| //===-- ObjectFileMachO.cpp -----------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/ADT/ScopeExit.h" |
| #include "llvm/ADT/StringRef.h" |
| |
| #include "Plugins/Process/Utility/RegisterContextDarwin_arm.h" |
| #include "Plugins/Process/Utility/RegisterContextDarwin_arm64.h" |
| #include "Plugins/Process/Utility/RegisterContextDarwin_i386.h" |
| #include "Plugins/Process/Utility/RegisterContextDarwin_x86_64.h" |
| #include "lldb/Core/Debugger.h" |
| #include "lldb/Core/FileSpecList.h" |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/ModuleSpec.h" |
| #include "lldb/Core/PluginManager.h" |
| #include "lldb/Core/Progress.h" |
| #include "lldb/Core/Section.h" |
| #include "lldb/Core/StreamFile.h" |
| #include "lldb/Host/Host.h" |
| #include "lldb/Symbol/DWARFCallFrameInfo.h" |
| #include "lldb/Symbol/LocateSymbolFile.h" |
| #include "lldb/Symbol/ObjectFile.h" |
| #include "lldb/Target/DynamicLoader.h" |
| #include "lldb/Target/MemoryRegionInfo.h" |
| #include "lldb/Target/Platform.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/SectionLoadList.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Target/Thread.h" |
| #include "lldb/Target/ThreadList.h" |
| #include "lldb/Utility/ArchSpec.h" |
| #include "lldb/Utility/DataBuffer.h" |
| #include "lldb/Utility/FileSpec.h" |
| #include "lldb/Utility/LLDBLog.h" |
| #include "lldb/Utility/Log.h" |
| #include "lldb/Utility/RangeMap.h" |
| #include "lldb/Utility/RegisterValue.h" |
| #include "lldb/Utility/Status.h" |
| #include "lldb/Utility/StreamString.h" |
| #include "lldb/Utility/Timer.h" |
| #include "lldb/Utility/UUID.h" |
| |
| #include "lldb/Host/SafeMachO.h" |
| |
| #include "llvm/ADT/DenseSet.h" |
| #include "llvm/Support/FormatVariadic.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| |
| #include "ObjectFileMachO.h" |
| |
| #if defined(__APPLE__) |
| #include <TargetConditionals.h> |
| // GetLLDBSharedCacheUUID() needs to call dlsym() |
| #include <dlfcn.h> |
| #include <mach/mach_init.h> |
| #include <mach/vm_map.h> |
| #include <lldb/Host/SafeMachO.h> |
| #endif |
| |
| #ifndef __APPLE__ |
| #include "Utility/UuidCompatibility.h" |
| #else |
| #include <uuid/uuid.h> |
| #endif |
| |
| #include <bitset> |
| #include <memory> |
| |
| // Unfortunately the signpost header pulls in the system MachO header, too. |
| #ifdef CPU_TYPE_ARM |
| #undef CPU_TYPE_ARM |
| #endif |
| #ifdef CPU_TYPE_ARM64 |
| #undef CPU_TYPE_ARM64 |
| #endif |
| #ifdef CPU_TYPE_ARM64_32 |
| #undef CPU_TYPE_ARM64_32 |
| #endif |
| #ifdef CPU_TYPE_I386 |
| #undef CPU_TYPE_I386 |
| #endif |
| #ifdef CPU_TYPE_X86_64 |
| #undef CPU_TYPE_X86_64 |
| #endif |
| #ifdef MH_DYLINKER |
| #undef MH_DYLINKER |
| #endif |
| #ifdef MH_OBJECT |
| #undef MH_OBJECT |
| #endif |
| #ifdef LC_VERSION_MIN_MACOSX |
| #undef LC_VERSION_MIN_MACOSX |
| #endif |
| #ifdef LC_VERSION_MIN_IPHONEOS |
| #undef LC_VERSION_MIN_IPHONEOS |
| #endif |
| #ifdef LC_VERSION_MIN_TVOS |
| #undef LC_VERSION_MIN_TVOS |
| #endif |
| #ifdef LC_VERSION_MIN_WATCHOS |
| #undef LC_VERSION_MIN_WATCHOS |
| #endif |
| #ifdef LC_BUILD_VERSION |
| #undef LC_BUILD_VERSION |
| #endif |
| #ifdef PLATFORM_MACOS |
| #undef PLATFORM_MACOS |
| #endif |
| #ifdef PLATFORM_MACCATALYST |
| #undef PLATFORM_MACCATALYST |
| #endif |
| #ifdef PLATFORM_IOS |
| #undef PLATFORM_IOS |
| #endif |
| #ifdef PLATFORM_IOSSIMULATOR |
| #undef PLATFORM_IOSSIMULATOR |
| #endif |
| #ifdef PLATFORM_TVOS |
| #undef PLATFORM_TVOS |
| #endif |
| #ifdef PLATFORM_TVOSSIMULATOR |
| #undef PLATFORM_TVOSSIMULATOR |
| #endif |
| #ifdef PLATFORM_WATCHOS |
| #undef PLATFORM_WATCHOS |
| #endif |
| #ifdef PLATFORM_WATCHOSSIMULATOR |
| #undef PLATFORM_WATCHOSSIMULATOR |
| #endif |
| |
| #define THUMB_ADDRESS_BIT_MASK 0xfffffffffffffffeull |
| using namespace lldb; |
| using namespace lldb_private; |
| using namespace llvm::MachO; |
| |
| LLDB_PLUGIN_DEFINE(ObjectFileMachO) |
| |
| // Some structure definitions needed for parsing the dyld shared cache files |
| // found on iOS devices. |
| |
| struct lldb_copy_dyld_cache_header_v1 { |
| char magic[16]; // e.g. "dyld_v0 i386", "dyld_v1 armv7", etc. |
| uint32_t mappingOffset; // file offset to first dyld_cache_mapping_info |
| uint32_t mappingCount; // number of dyld_cache_mapping_info entries |
| uint32_t imagesOffset; |
| uint32_t imagesCount; |
| uint64_t dyldBaseAddress; |
| uint64_t codeSignatureOffset; |
| uint64_t codeSignatureSize; |
| uint64_t slideInfoOffset; |
| uint64_t slideInfoSize; |
| uint64_t localSymbolsOffset; |
| uint64_t localSymbolsSize; |
| uint8_t uuid[16]; // v1 and above, also recorded in dyld_all_image_infos v13 |
| // and later |
| }; |
| |
| static void PrintRegisterValue(RegisterContext *reg_ctx, const char *name, |
| const char *alt_name, size_t reg_byte_size, |
| Stream &data) { |
| const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoByName(name); |
| if (reg_info == nullptr) |
| reg_info = reg_ctx->GetRegisterInfoByName(alt_name); |
| if (reg_info) { |
| lldb_private::RegisterValue reg_value; |
| if (reg_ctx->ReadRegister(reg_info, reg_value)) { |
| if (reg_info->byte_size >= reg_byte_size) |
| data.Write(reg_value.GetBytes(), reg_byte_size); |
| else { |
| data.Write(reg_value.GetBytes(), reg_info->byte_size); |
| for (size_t i = 0, n = reg_byte_size - reg_info->byte_size; i < n; ++i) |
| data.PutChar(0); |
| } |
| return; |
| } |
| } |
| // Just write zeros if all else fails |
| for (size_t i = 0; i < reg_byte_size; ++i) |
| data.PutChar(0); |
| } |
| |
| class RegisterContextDarwin_x86_64_Mach : public RegisterContextDarwin_x86_64 { |
| public: |
| RegisterContextDarwin_x86_64_Mach(lldb_private::Thread &thread, |
| const DataExtractor &data) |
| : RegisterContextDarwin_x86_64(thread, 0) { |
| SetRegisterDataFrom_LC_THREAD(data); |
| } |
| |
| void InvalidateAllRegisters() override { |
| // Do nothing... registers are always valid... |
| } |
| |
| void SetRegisterDataFrom_LC_THREAD(const DataExtractor &data) { |
| lldb::offset_t offset = 0; |
| SetError(GPRRegSet, Read, -1); |
| SetError(FPURegSet, Read, -1); |
| SetError(EXCRegSet, Read, -1); |
| bool done = false; |
| |
| while (!done) { |
| int flavor = data.GetU32(&offset); |
| if (flavor == 0) |
| done = true; |
| else { |
| uint32_t i; |
| uint32_t count = data.GetU32(&offset); |
| switch (flavor) { |
| case GPRRegSet: |
| for (i = 0; i < count; ++i) |
| (&gpr.rax)[i] = data.GetU64(&offset); |
| SetError(GPRRegSet, Read, 0); |
| done = true; |
| |
| break; |
| case FPURegSet: |
| // TODO: fill in FPU regs.... |
| // SetError (FPURegSet, Read, -1); |
| done = true; |
| |
| break; |
| case EXCRegSet: |
| exc.trapno = data.GetU32(&offset); |
| exc.err = data.GetU32(&offset); |
| exc.faultvaddr = data.GetU64(&offset); |
| SetError(EXCRegSet, Read, 0); |
| done = true; |
| break; |
| case 7: |
| case 8: |
| case 9: |
| // fancy flavors that encapsulate of the above flavors... |
| break; |
| |
| default: |
| done = true; |
| break; |
| } |
| } |
| } |
| } |
| |
| static bool Create_LC_THREAD(Thread *thread, Stream &data) { |
| RegisterContextSP reg_ctx_sp(thread->GetRegisterContext()); |
| if (reg_ctx_sp) { |
| RegisterContext *reg_ctx = reg_ctx_sp.get(); |
| |
| data.PutHex32(GPRRegSet); // Flavor |
| data.PutHex32(GPRWordCount); |
| PrintRegisterValue(reg_ctx, "rax", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "rbx", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "rcx", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "rdx", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "rdi", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "rsi", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "rbp", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "rsp", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "r8", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "r9", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "r10", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "r11", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "r12", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "r13", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "r14", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "r15", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "rip", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "rflags", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "cs", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "fs", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "gs", nullptr, 8, data); |
| |
| // // Write out the FPU registers |
| // const size_t fpu_byte_size = sizeof(FPU); |
| // size_t bytes_written = 0; |
| // data.PutHex32 (FPURegSet); |
| // data.PutHex32 (fpu_byte_size/sizeof(uint64_t)); |
| // bytes_written += data.PutHex32(0); // uint32_t pad[0] |
| // bytes_written += data.PutHex32(0); // uint32_t pad[1] |
| // bytes_written += WriteRegister (reg_ctx, "fcw", "fctrl", 2, |
| // data); // uint16_t fcw; // "fctrl" |
| // bytes_written += WriteRegister (reg_ctx, "fsw" , "fstat", 2, |
| // data); // uint16_t fsw; // "fstat" |
| // bytes_written += WriteRegister (reg_ctx, "ftw" , "ftag", 1, |
| // data); // uint8_t ftw; // "ftag" |
| // bytes_written += data.PutHex8 (0); // uint8_t pad1; |
| // bytes_written += WriteRegister (reg_ctx, "fop" , NULL, 2, |
| // data); // uint16_t fop; // "fop" |
| // bytes_written += WriteRegister (reg_ctx, "fioff", "ip", 4, |
| // data); // uint32_t ip; // "fioff" |
| // bytes_written += WriteRegister (reg_ctx, "fiseg", NULL, 2, |
| // data); // uint16_t cs; // "fiseg" |
| // bytes_written += data.PutHex16 (0); // uint16_t pad2; |
| // bytes_written += WriteRegister (reg_ctx, "dp", "fooff" , 4, |
| // data); // uint32_t dp; // "fooff" |
| // bytes_written += WriteRegister (reg_ctx, "foseg", NULL, 2, |
| // data); // uint16_t ds; // "foseg" |
| // bytes_written += data.PutHex16 (0); // uint16_t pad3; |
| // bytes_written += WriteRegister (reg_ctx, "mxcsr", NULL, 4, |
| // data); // uint32_t mxcsr; |
| // bytes_written += WriteRegister (reg_ctx, "mxcsrmask", NULL, |
| // 4, data);// uint32_t mxcsrmask; |
| // bytes_written += WriteRegister (reg_ctx, "stmm0", NULL, |
| // sizeof(MMSReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "stmm1", NULL, |
| // sizeof(MMSReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "stmm2", NULL, |
| // sizeof(MMSReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "stmm3", NULL, |
| // sizeof(MMSReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "stmm4", NULL, |
| // sizeof(MMSReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "stmm5", NULL, |
| // sizeof(MMSReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "stmm6", NULL, |
| // sizeof(MMSReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "stmm7", NULL, |
| // sizeof(MMSReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm0" , NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm1" , NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm2" , NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm3" , NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm4" , NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm5" , NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm6" , NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm7" , NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm8" , NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm9" , NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm10", NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm11", NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm12", NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm13", NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm14", NULL, |
| // sizeof(XMMReg), data); |
| // bytes_written += WriteRegister (reg_ctx, "xmm15", NULL, |
| // sizeof(XMMReg), data); |
| // |
| // // Fill rest with zeros |
| // for (size_t i=0, n = fpu_byte_size - bytes_written; i<n; ++ |
| // i) |
| // data.PutChar(0); |
| |
| // Write out the EXC registers |
| data.PutHex32(EXCRegSet); |
| data.PutHex32(EXCWordCount); |
| PrintRegisterValue(reg_ctx, "trapno", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "err", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "faultvaddr", nullptr, 8, data); |
| return true; |
| } |
| return false; |
| } |
| |
| protected: |
| int DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) override { return 0; } |
| |
| int DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) override { return 0; } |
| |
| int DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) override { return 0; } |
| |
| int DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) override { |
| return 0; |
| } |
| |
| int DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) override { |
| return 0; |
| } |
| |
| int DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) override { |
| return 0; |
| } |
| }; |
| |
| class RegisterContextDarwin_i386_Mach : public RegisterContextDarwin_i386 { |
| public: |
| RegisterContextDarwin_i386_Mach(lldb_private::Thread &thread, |
| const DataExtractor &data) |
| : RegisterContextDarwin_i386(thread, 0) { |
| SetRegisterDataFrom_LC_THREAD(data); |
| } |
| |
| void InvalidateAllRegisters() override { |
| // Do nothing... registers are always valid... |
| } |
| |
| void SetRegisterDataFrom_LC_THREAD(const DataExtractor &data) { |
| lldb::offset_t offset = 0; |
| SetError(GPRRegSet, Read, -1); |
| SetError(FPURegSet, Read, -1); |
| SetError(EXCRegSet, Read, -1); |
| bool done = false; |
| |
| while (!done) { |
| int flavor = data.GetU32(&offset); |
| if (flavor == 0) |
| done = true; |
| else { |
| uint32_t i; |
| uint32_t count = data.GetU32(&offset); |
| switch (flavor) { |
| case GPRRegSet: |
| for (i = 0; i < count; ++i) |
| (&gpr.eax)[i] = data.GetU32(&offset); |
| SetError(GPRRegSet, Read, 0); |
| done = true; |
| |
| break; |
| case FPURegSet: |
| // TODO: fill in FPU regs.... |
| // SetError (FPURegSet, Read, -1); |
| done = true; |
| |
| break; |
| case EXCRegSet: |
| exc.trapno = data.GetU32(&offset); |
| exc.err = data.GetU32(&offset); |
| exc.faultvaddr = data.GetU32(&offset); |
| SetError(EXCRegSet, Read, 0); |
| done = true; |
| break; |
| case 7: |
| case 8: |
| case 9: |
| // fancy flavors that encapsulate of the above flavors... |
| break; |
| |
| default: |
| done = true; |
| break; |
| } |
| } |
| } |
| } |
| |
| static bool Create_LC_THREAD(Thread *thread, Stream &data) { |
| RegisterContextSP reg_ctx_sp(thread->GetRegisterContext()); |
| if (reg_ctx_sp) { |
| RegisterContext *reg_ctx = reg_ctx_sp.get(); |
| |
| data.PutHex32(GPRRegSet); // Flavor |
| data.PutHex32(GPRWordCount); |
| PrintRegisterValue(reg_ctx, "eax", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "ebx", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "ecx", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "edx", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "edi", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "esi", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "ebp", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "esp", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "ss", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "eflags", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "eip", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "cs", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "ds", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "es", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "fs", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "gs", nullptr, 4, data); |
| |
| // Write out the EXC registers |
| data.PutHex32(EXCRegSet); |
| data.PutHex32(EXCWordCount); |
| PrintRegisterValue(reg_ctx, "trapno", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "err", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "faultvaddr", nullptr, 4, data); |
| return true; |
| } |
| return false; |
| } |
| |
| protected: |
| int DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) override { return 0; } |
| |
| int DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) override { return 0; } |
| |
| int DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) override { return 0; } |
| |
| int DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) override { |
| return 0; |
| } |
| |
| int DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) override { |
| return 0; |
| } |
| |
| int DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) override { |
| return 0; |
| } |
| }; |
| |
| class RegisterContextDarwin_arm_Mach : public RegisterContextDarwin_arm { |
| public: |
| RegisterContextDarwin_arm_Mach(lldb_private::Thread &thread, |
| const DataExtractor &data) |
| : RegisterContextDarwin_arm(thread, 0) { |
| SetRegisterDataFrom_LC_THREAD(data); |
| } |
| |
| void InvalidateAllRegisters() override { |
| // Do nothing... registers are always valid... |
| } |
| |
| void SetRegisterDataFrom_LC_THREAD(const DataExtractor &data) { |
| lldb::offset_t offset = 0; |
| SetError(GPRRegSet, Read, -1); |
| SetError(FPURegSet, Read, -1); |
| SetError(EXCRegSet, Read, -1); |
| bool done = false; |
| |
| while (!done) { |
| int flavor = data.GetU32(&offset); |
| uint32_t count = data.GetU32(&offset); |
| lldb::offset_t next_thread_state = offset + (count * 4); |
| switch (flavor) { |
| case GPRAltRegSet: |
| case GPRRegSet: |
| // On ARM, the CPSR register is also included in the count but it is |
| // not included in gpr.r so loop until (count-1). |
| for (uint32_t i = 0; i < (count - 1); ++i) { |
| gpr.r[i] = data.GetU32(&offset); |
| } |
| // Save cpsr explicitly. |
| gpr.cpsr = data.GetU32(&offset); |
| |
| SetError(GPRRegSet, Read, 0); |
| offset = next_thread_state; |
| break; |
| |
| case FPURegSet: { |
| uint8_t *fpu_reg_buf = (uint8_t *)&fpu.floats.s[0]; |
| const int fpu_reg_buf_size = sizeof(fpu.floats); |
| if (data.ExtractBytes(offset, fpu_reg_buf_size, eByteOrderLittle, |
| fpu_reg_buf) == fpu_reg_buf_size) { |
| offset += fpu_reg_buf_size; |
| fpu.fpscr = data.GetU32(&offset); |
| SetError(FPURegSet, Read, 0); |
| } else { |
| done = true; |
| } |
| } |
| offset = next_thread_state; |
| break; |
| |
| case EXCRegSet: |
| if (count == 3) { |
| exc.exception = data.GetU32(&offset); |
| exc.fsr = data.GetU32(&offset); |
| exc.far = data.GetU32(&offset); |
| SetError(EXCRegSet, Read, 0); |
| } |
| done = true; |
| offset = next_thread_state; |
| break; |
| |
| // Unknown register set flavor, stop trying to parse. |
| default: |
| done = true; |
| } |
| } |
| } |
| |
| static bool Create_LC_THREAD(Thread *thread, Stream &data) { |
| RegisterContextSP reg_ctx_sp(thread->GetRegisterContext()); |
| if (reg_ctx_sp) { |
| RegisterContext *reg_ctx = reg_ctx_sp.get(); |
| |
| data.PutHex32(GPRRegSet); // Flavor |
| data.PutHex32(GPRWordCount); |
| PrintRegisterValue(reg_ctx, "r0", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "r1", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "r2", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "r3", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "r4", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "r5", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "r6", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "r7", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "r8", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "r9", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "r10", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "r11", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "r12", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "sp", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "lr", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "pc", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "cpsr", nullptr, 4, data); |
| |
| // Write out the EXC registers |
| // data.PutHex32 (EXCRegSet); |
| // data.PutHex32 (EXCWordCount); |
| // WriteRegister (reg_ctx, "exception", NULL, 4, data); |
| // WriteRegister (reg_ctx, "fsr", NULL, 4, data); |
| // WriteRegister (reg_ctx, "far", NULL, 4, data); |
| return true; |
| } |
| return false; |
| } |
| |
| protected: |
| int DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) override { return -1; } |
| |
| int DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) override { return -1; } |
| |
| int DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) override { return -1; } |
| |
| int DoReadDBG(lldb::tid_t tid, int flavor, DBG &dbg) override { return -1; } |
| |
| int DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) override { |
| return 0; |
| } |
| |
| int DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) override { |
| return 0; |
| } |
| |
| int DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) override { |
| return 0; |
| } |
| |
| int DoWriteDBG(lldb::tid_t tid, int flavor, const DBG &dbg) override { |
| return -1; |
| } |
| }; |
| |
| class RegisterContextDarwin_arm64_Mach : public RegisterContextDarwin_arm64 { |
| public: |
| RegisterContextDarwin_arm64_Mach(lldb_private::Thread &thread, |
| const DataExtractor &data) |
| : RegisterContextDarwin_arm64(thread, 0) { |
| SetRegisterDataFrom_LC_THREAD(data); |
| } |
| |
| void InvalidateAllRegisters() override { |
| // Do nothing... registers are always valid... |
| } |
| |
| void SetRegisterDataFrom_LC_THREAD(const DataExtractor &data) { |
| lldb::offset_t offset = 0; |
| SetError(GPRRegSet, Read, -1); |
| SetError(FPURegSet, Read, -1); |
| SetError(EXCRegSet, Read, -1); |
| bool done = false; |
| while (!done) { |
| int flavor = data.GetU32(&offset); |
| uint32_t count = data.GetU32(&offset); |
| lldb::offset_t next_thread_state = offset + (count * 4); |
| switch (flavor) { |
| case GPRRegSet: |
| // x0-x29 + fp + lr + sp + pc (== 33 64-bit registers) plus cpsr (1 |
| // 32-bit register) |
| if (count >= (33 * 2) + 1) { |
| for (uint32_t i = 0; i < 29; ++i) |
| gpr.x[i] = data.GetU64(&offset); |
| gpr.fp = data.GetU64(&offset); |
| gpr.lr = data.GetU64(&offset); |
| gpr.sp = data.GetU64(&offset); |
| gpr.pc = data.GetU64(&offset); |
| gpr.cpsr = data.GetU32(&offset); |
| SetError(GPRRegSet, Read, 0); |
| } |
| offset = next_thread_state; |
| break; |
| case FPURegSet: { |
| uint8_t *fpu_reg_buf = (uint8_t *)&fpu.v[0]; |
| const int fpu_reg_buf_size = sizeof(fpu); |
| if (fpu_reg_buf_size == count * sizeof(uint32_t) && |
| data.ExtractBytes(offset, fpu_reg_buf_size, eByteOrderLittle, |
| fpu_reg_buf) == fpu_reg_buf_size) { |
| SetError(FPURegSet, Read, 0); |
| } else { |
| done = true; |
| } |
| } |
| offset = next_thread_state; |
| break; |
| case EXCRegSet: |
| if (count == 4) { |
| exc.far = data.GetU64(&offset); |
| exc.esr = data.GetU32(&offset); |
| exc.exception = data.GetU32(&offset); |
| SetError(EXCRegSet, Read, 0); |
| } |
| offset = next_thread_state; |
| break; |
| default: |
| done = true; |
| break; |
| } |
| } |
| } |
| |
| static bool Create_LC_THREAD(Thread *thread, Stream &data) { |
| RegisterContextSP reg_ctx_sp(thread->GetRegisterContext()); |
| if (reg_ctx_sp) { |
| RegisterContext *reg_ctx = reg_ctx_sp.get(); |
| |
| data.PutHex32(GPRRegSet); // Flavor |
| data.PutHex32(GPRWordCount); |
| PrintRegisterValue(reg_ctx, "x0", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x1", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x2", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x3", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x4", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x5", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x6", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x7", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x8", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x9", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x10", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x11", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x12", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x13", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x14", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x15", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x16", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x17", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x18", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x19", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x20", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x21", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x22", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x23", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x24", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x25", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x26", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x27", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "x28", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "fp", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "lr", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "sp", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "pc", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "cpsr", nullptr, 4, data); |
| data.PutHex32(0); // uint32_t pad at the end |
| |
| // Write out the EXC registers |
| data.PutHex32(EXCRegSet); |
| data.PutHex32(EXCWordCount); |
| PrintRegisterValue(reg_ctx, "far", nullptr, 8, data); |
| PrintRegisterValue(reg_ctx, "esr", nullptr, 4, data); |
| PrintRegisterValue(reg_ctx, "exception", nullptr, 4, data); |
| return true; |
| } |
| return false; |
| } |
| |
| protected: |
| int DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) override { return -1; } |
| |
| int DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) override { return -1; } |
| |
| int DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) override { return -1; } |
| |
| int DoReadDBG(lldb::tid_t tid, int flavor, DBG &dbg) override { return -1; } |
| |
| int DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) override { |
| return 0; |
| } |
| |
| int DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) override { |
| return 0; |
| } |
| |
| int DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) override { |
| return 0; |
| } |
| |
| int DoWriteDBG(lldb::tid_t tid, int flavor, const DBG &dbg) override { |
| return -1; |
| } |
| }; |
| |
| static uint32_t MachHeaderSizeFromMagic(uint32_t magic) { |
| switch (magic) { |
| case MH_MAGIC: |
| case MH_CIGAM: |
| return sizeof(struct llvm::MachO::mach_header); |
| |
| case MH_MAGIC_64: |
| case MH_CIGAM_64: |
| return sizeof(struct llvm::MachO::mach_header_64); |
| break; |
| |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| #define MACHO_NLIST_ARM_SYMBOL_IS_THUMB 0x0008 |
| |
| char ObjectFileMachO::ID; |
| |
| void ObjectFileMachO::Initialize() { |
| PluginManager::RegisterPlugin( |
| GetPluginNameStatic(), GetPluginDescriptionStatic(), CreateInstance, |
| CreateMemoryInstance, GetModuleSpecifications, SaveCore); |
| } |
| |
| void ObjectFileMachO::Terminate() { |
| PluginManager::UnregisterPlugin(CreateInstance); |
| } |
| |
| ObjectFile *ObjectFileMachO::CreateInstance(const lldb::ModuleSP &module_sp, |
| DataBufferSP data_sp, |
| lldb::offset_t data_offset, |
| const FileSpec *file, |
| lldb::offset_t file_offset, |
| lldb::offset_t length) { |
| if (!data_sp) { |
| data_sp = MapFileData(*file, length, file_offset); |
| if (!data_sp) |
| return nullptr; |
| data_offset = 0; |
| } |
| |
| if (!ObjectFileMachO::MagicBytesMatch(data_sp, data_offset, length)) |
| return nullptr; |
| |
| // Update the data to contain the entire file if it doesn't already |
| if (data_sp->GetByteSize() < length) { |
| data_sp = MapFileData(*file, length, file_offset); |
| if (!data_sp) |
| return nullptr; |
| data_offset = 0; |
| } |
| auto objfile_up = std::make_unique<ObjectFileMachO>( |
| module_sp, data_sp, data_offset, file, file_offset, length); |
| if (!objfile_up || !objfile_up->ParseHeader()) |
| return nullptr; |
| |
| return objfile_up.release(); |
| } |
| |
| ObjectFile *ObjectFileMachO::CreateMemoryInstance( |
| const lldb::ModuleSP &module_sp, WritableDataBufferSP data_sp, |
| const ProcessSP &process_sp, lldb::addr_t header_addr) { |
| if (ObjectFileMachO::MagicBytesMatch(data_sp, 0, data_sp->GetByteSize())) { |
| std::unique_ptr<ObjectFile> objfile_up( |
| new ObjectFileMachO(module_sp, data_sp, process_sp, header_addr)); |
| if (objfile_up.get() && objfile_up->ParseHeader()) |
| return objfile_up.release(); |
| } |
| return nullptr; |
| } |
| |
| size_t ObjectFileMachO::GetModuleSpecifications( |
| const lldb_private::FileSpec &file, lldb::DataBufferSP &data_sp, |
| lldb::offset_t data_offset, lldb::offset_t file_offset, |
| lldb::offset_t length, lldb_private::ModuleSpecList &specs) { |
| const size_t initial_count = specs.GetSize(); |
| |
| if (ObjectFileMachO::MagicBytesMatch(data_sp, 0, data_sp->GetByteSize())) { |
| DataExtractor data; |
| data.SetData(data_sp); |
| llvm::MachO::mach_header header; |
| if (ParseHeader(data, &data_offset, header)) { |
| size_t header_and_load_cmds = |
| header.sizeofcmds + MachHeaderSizeFromMagic(header.magic); |
| if (header_and_load_cmds >= data_sp->GetByteSize()) { |
| data_sp = MapFileData(file, header_and_load_cmds, file_offset); |
| data.SetData(data_sp); |
| data_offset = MachHeaderSizeFromMagic(header.magic); |
| } |
| if (data_sp) { |
| ModuleSpec base_spec; |
| base_spec.GetFileSpec() = file; |
| base_spec.SetObjectOffset(file_offset); |
| base_spec.SetObjectSize(length); |
| GetAllArchSpecs(header, data, data_offset, base_spec, specs); |
| } |
| } |
| } |
| return specs.GetSize() - initial_count; |
| } |
| |
| ConstString ObjectFileMachO::GetSegmentNameTEXT() { |
| static ConstString g_segment_name_TEXT("__TEXT"); |
| return g_segment_name_TEXT; |
| } |
| |
| ConstString ObjectFileMachO::GetSegmentNameDATA() { |
| static ConstString g_segment_name_DATA("__DATA"); |
| return g_segment_name_DATA; |
| } |
| |
| ConstString ObjectFileMachO::GetSegmentNameDATA_DIRTY() { |
| static ConstString g_segment_name("__DATA_DIRTY"); |
| return g_segment_name; |
| } |
| |
| ConstString ObjectFileMachO::GetSegmentNameDATA_CONST() { |
| static ConstString g_segment_name("__DATA_CONST"); |
| return g_segment_name; |
| } |
| |
| ConstString ObjectFileMachO::GetSegmentNameOBJC() { |
| static ConstString g_segment_name_OBJC("__OBJC"); |
| return g_segment_name_OBJC; |
| } |
| |
| ConstString ObjectFileMachO::GetSegmentNameLINKEDIT() { |
| static ConstString g_section_name_LINKEDIT("__LINKEDIT"); |
| return g_section_name_LINKEDIT; |
| } |
| |
| ConstString ObjectFileMachO::GetSegmentNameDWARF() { |
| static ConstString g_section_name("__DWARF"); |
| return g_section_name; |
| } |
| |
| ConstString ObjectFileMachO::GetSectionNameEHFrame() { |
| static ConstString g_section_name_eh_frame("__eh_frame"); |
| return g_section_name_eh_frame; |
| } |
| |
| bool ObjectFileMachO::MagicBytesMatch(DataBufferSP data_sp, |
| lldb::addr_t data_offset, |
| lldb::addr_t data_length) { |
| DataExtractor data; |
| data.SetData(data_sp, data_offset, data_length); |
| lldb::offset_t offset = 0; |
| uint32_t magic = data.GetU32(&offset); |
| return MachHeaderSizeFromMagic(magic) != 0; |
| } |
| |
| ObjectFileMachO::ObjectFileMachO(const lldb::ModuleSP &module_sp, |
| DataBufferSP data_sp, |
| lldb::offset_t data_offset, |
| const FileSpec *file, |
| lldb::offset_t file_offset, |
| lldb::offset_t length) |
| : ObjectFile(module_sp, file, file_offset, length, data_sp, data_offset), |
| m_mach_segments(), m_mach_sections(), m_entry_point_address(), |
| m_thread_context_offsets(), m_thread_context_offsets_valid(false), |
| m_reexported_dylibs(), m_allow_assembly_emulation_unwind_plans(true) { |
| ::memset(&m_header, 0, sizeof(m_header)); |
| ::memset(&m_dysymtab, 0, sizeof(m_dysymtab)); |
| } |
| |
| ObjectFileMachO::ObjectFileMachO(const lldb::ModuleSP &module_sp, |
| lldb::WritableDataBufferSP header_data_sp, |
| const lldb::ProcessSP &process_sp, |
| lldb::addr_t header_addr) |
| : ObjectFile(module_sp, process_sp, header_addr, header_data_sp), |
| m_mach_segments(), m_mach_sections(), m_entry_point_address(), |
| m_thread_context_offsets(), m_thread_context_offsets_valid(false), |
| m_reexported_dylibs(), m_allow_assembly_emulation_unwind_plans(true) { |
| ::memset(&m_header, 0, sizeof(m_header)); |
| ::memset(&m_dysymtab, 0, sizeof(m_dysymtab)); |
| } |
| |
| bool ObjectFileMachO::ParseHeader(DataExtractor &data, |
| lldb::offset_t *data_offset_ptr, |
| llvm::MachO::mach_header &header) { |
| data.SetByteOrder(endian::InlHostByteOrder()); |
| // Leave magic in the original byte order |
| header.magic = data.GetU32(data_offset_ptr); |
| bool can_parse = false; |
| bool is_64_bit = false; |
| switch (header.magic) { |
| case MH_MAGIC: |
| data.SetByteOrder(endian::InlHostByteOrder()); |
| data.SetAddressByteSize(4); |
| can_parse = true; |
| break; |
| |
| case MH_MAGIC_64: |
| data.SetByteOrder(endian::InlHostByteOrder()); |
| data.SetAddressByteSize(8); |
| can_parse = true; |
| is_64_bit = true; |
| break; |
| |
| case MH_CIGAM: |
| data.SetByteOrder(endian::InlHostByteOrder() == eByteOrderBig |
| ? eByteOrderLittle |
| : eByteOrderBig); |
| data.SetAddressByteSize(4); |
| can_parse = true; |
| break; |
| |
| case MH_CIGAM_64: |
| data.SetByteOrder(endian::InlHostByteOrder() == eByteOrderBig |
| ? eByteOrderLittle |
| : eByteOrderBig); |
| data.SetAddressByteSize(8); |
| is_64_bit = true; |
| can_parse = true; |
| break; |
| |
| default: |
| break; |
| } |
| |
| if (can_parse) { |
| data.GetU32(data_offset_ptr, &header.cputype, 6); |
| if (is_64_bit) |
| *data_offset_ptr += 4; |
| return true; |
| } else { |
| memset(&header, 0, sizeof(header)); |
| } |
| return false; |
| } |
| |
| bool ObjectFileMachO::ParseHeader() { |
| ModuleSP module_sp(GetModule()); |
| if (!module_sp) |
| return false; |
| |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| bool can_parse = false; |
| lldb::offset_t offset = 0; |
| m_data.SetByteOrder(endian::InlHostByteOrder()); |
| // Leave magic in the original byte order |
| m_header.magic = m_data.GetU32(&offset); |
| switch (m_header.magic) { |
| case MH_MAGIC: |
| m_data.SetByteOrder(endian::InlHostByteOrder()); |
| m_data.SetAddressByteSize(4); |
| can_parse = true; |
| break; |
| |
| case MH_MAGIC_64: |
| m_data.SetByteOrder(endian::InlHostByteOrder()); |
| m_data.SetAddressByteSize(8); |
| can_parse = true; |
| break; |
| |
| case MH_CIGAM: |
| m_data.SetByteOrder(endian::InlHostByteOrder() == eByteOrderBig |
| ? eByteOrderLittle |
| : eByteOrderBig); |
| m_data.SetAddressByteSize(4); |
| can_parse = true; |
| break; |
| |
| case MH_CIGAM_64: |
| m_data.SetByteOrder(endian::InlHostByteOrder() == eByteOrderBig |
| ? eByteOrderLittle |
| : eByteOrderBig); |
| m_data.SetAddressByteSize(8); |
| can_parse = true; |
| break; |
| |
| default: |
| break; |
| } |
| |
| if (can_parse) { |
| m_data.GetU32(&offset, &m_header.cputype, 6); |
| |
| ModuleSpecList all_specs; |
| ModuleSpec base_spec; |
| GetAllArchSpecs(m_header, m_data, MachHeaderSizeFromMagic(m_header.magic), |
| base_spec, all_specs); |
| |
| for (unsigned i = 0, e = all_specs.GetSize(); i != e; ++i) { |
| ArchSpec mach_arch = |
| all_specs.GetModuleSpecRefAtIndex(i).GetArchitecture(); |
| |
| // Check if the module has a required architecture |
| const ArchSpec &module_arch = module_sp->GetArchitecture(); |
| if (module_arch.IsValid() && !module_arch.IsCompatibleMatch(mach_arch)) |
| continue; |
| |
| if (SetModulesArchitecture(mach_arch)) { |
| const size_t header_and_lc_size = |
| m_header.sizeofcmds + MachHeaderSizeFromMagic(m_header.magic); |
| if (m_data.GetByteSize() < header_and_lc_size) { |
| DataBufferSP data_sp; |
| ProcessSP process_sp(m_process_wp.lock()); |
| if (process_sp) { |
| data_sp = ReadMemory(process_sp, m_memory_addr, header_and_lc_size); |
| } else { |
| // Read in all only the load command data from the file on disk |
| data_sp = MapFileData(m_file, header_and_lc_size, m_file_offset); |
| if (data_sp->GetByteSize() != header_and_lc_size) |
| continue; |
| } |
| if (data_sp) |
| m_data.SetData(data_sp); |
| } |
| } |
| return true; |
| } |
| // None found. |
| return false; |
| } else { |
| memset(&m_header, 0, sizeof(struct llvm::MachO::mach_header)); |
| } |
| return false; |
| } |
| |
| ByteOrder ObjectFileMachO::GetByteOrder() const { |
| return m_data.GetByteOrder(); |
| } |
| |
| bool ObjectFileMachO::IsExecutable() const { |
| return m_header.filetype == MH_EXECUTE; |
| } |
| |
| bool ObjectFileMachO::IsDynamicLoader() const { |
| return m_header.filetype == MH_DYLINKER; |
| } |
| |
| bool ObjectFileMachO::IsSharedCacheBinary() const { |
| return m_header.flags & MH_DYLIB_IN_CACHE; |
| } |
| |
| uint32_t ObjectFileMachO::GetAddressByteSize() const { |
| return m_data.GetAddressByteSize(); |
| } |
| |
| AddressClass ObjectFileMachO::GetAddressClass(lldb::addr_t file_addr) { |
| Symtab *symtab = GetSymtab(); |
| if (!symtab) |
| return AddressClass::eUnknown; |
| |
| Symbol *symbol = symtab->FindSymbolContainingFileAddress(file_addr); |
| if (symbol) { |
| if (symbol->ValueIsAddress()) { |
| SectionSP section_sp(symbol->GetAddressRef().GetSection()); |
| if (section_sp) { |
| const lldb::SectionType section_type = section_sp->GetType(); |
| switch (section_type) { |
| case eSectionTypeInvalid: |
| return AddressClass::eUnknown; |
| |
| case eSectionTypeCode: |
| if (m_header.cputype == llvm::MachO::CPU_TYPE_ARM) { |
| // For ARM we have a bit in the n_desc field of the symbol that |
| // tells us ARM/Thumb which is bit 0x0008. |
| if (symbol->GetFlags() & MACHO_NLIST_ARM_SYMBOL_IS_THUMB) |
| return AddressClass::eCodeAlternateISA; |
| } |
| return AddressClass::eCode; |
| |
| case eSectionTypeContainer: |
| return AddressClass::eUnknown; |
| |
| case eSectionTypeData: |
| case eSectionTypeDataCString: |
| case eSectionTypeDataCStringPointers: |
| case eSectionTypeDataSymbolAddress: |
| case eSectionTypeData4: |
| case eSectionTypeData8: |
| case eSectionTypeData16: |
| case eSectionTypeDataPointers: |
| case eSectionTypeZeroFill: |
| case eSectionTypeDataObjCMessageRefs: |
| case eSectionTypeDataObjCCFStrings: |
| case eSectionTypeGoSymtab: |
| return AddressClass::eData; |
| |
| case eSectionTypeDebug: |
| case eSectionTypeDWARFDebugAbbrev: |
| case eSectionTypeDWARFDebugAbbrevDwo: |
| case eSectionTypeDWARFDebugAddr: |
| case eSectionTypeDWARFDebugAranges: |
| case eSectionTypeDWARFDebugCuIndex: |
| case eSectionTypeDWARFDebugFrame: |
| case eSectionTypeDWARFDebugInfo: |
| case eSectionTypeDWARFDebugInfoDwo: |
| case eSectionTypeDWARFDebugLine: |
| case eSectionTypeDWARFDebugLineStr: |
| case eSectionTypeDWARFDebugLoc: |
| case eSectionTypeDWARFDebugLocDwo: |
| case eSectionTypeDWARFDebugLocLists: |
| case eSectionTypeDWARFDebugLocListsDwo: |
| case eSectionTypeDWARFDebugMacInfo: |
| case eSectionTypeDWARFDebugMacro: |
| case eSectionTypeDWARFDebugNames: |
| case eSectionTypeDWARFDebugPubNames: |
| case eSectionTypeDWARFDebugPubTypes: |
| case eSectionTypeDWARFDebugRanges: |
| case eSectionTypeDWARFDebugRngLists: |
| case eSectionTypeDWARFDebugRngListsDwo: |
| case eSectionTypeDWARFDebugStr: |
| case eSectionTypeDWARFDebugStrDwo: |
| case eSectionTypeDWARFDebugStrOffsets: |
| case eSectionTypeDWARFDebugStrOffsetsDwo: |
| case eSectionTypeDWARFDebugTuIndex: |
| case eSectionTypeDWARFDebugTypes: |
| case eSectionTypeDWARFDebugTypesDwo: |
| case eSectionTypeDWARFAppleNames: |
| case eSectionTypeDWARFAppleTypes: |
| case eSectionTypeDWARFAppleNamespaces: |
| case eSectionTypeDWARFAppleObjC: |
| case eSectionTypeDWARFGNUDebugAltLink: |
| return AddressClass::eDebug; |
| |
| case eSectionTypeEHFrame: |
| case eSectionTypeARMexidx: |
| case eSectionTypeARMextab: |
| case eSectionTypeCompactUnwind: |
| return AddressClass::eRuntime; |
| |
| case eSectionTypeAbsoluteAddress: |
| case eSectionTypeELFSymbolTable: |
| case eSectionTypeELFDynamicSymbols: |
| case eSectionTypeELFRelocationEntries: |
| case eSectionTypeELFDynamicLinkInfo: |
| case eSectionTypeOther: |
| return AddressClass::eUnknown; |
| } |
| } |
| } |
| |
| const SymbolType symbol_type = symbol->GetType(); |
| switch (symbol_type) { |
| case eSymbolTypeAny: |
| return AddressClass::eUnknown; |
| case eSymbolTypeAbsolute: |
| return AddressClass::eUnknown; |
| |
| case eSymbolTypeCode: |
| case eSymbolTypeTrampoline: |
| case eSymbolTypeResolver: |
| if (m_header.cputype == llvm::MachO::CPU_TYPE_ARM) { |
| // For ARM we have a bit in the n_desc field of the symbol that tells |
| // us ARM/Thumb which is bit 0x0008. |
| if (symbol->GetFlags() & MACHO_NLIST_ARM_SYMBOL_IS_THUMB) |
| return AddressClass::eCodeAlternateISA; |
| } |
| return AddressClass::eCode; |
| |
| case eSymbolTypeData: |
| return AddressClass::eData; |
| case eSymbolTypeRuntime: |
| return AddressClass::eRuntime; |
| case eSymbolTypeException: |
| return AddressClass::eRuntime; |
| case eSymbolTypeSourceFile: |
| return AddressClass::eDebug; |
| case eSymbolTypeHeaderFile: |
| return AddressClass::eDebug; |
| case eSymbolTypeObjectFile: |
| return AddressClass::eDebug; |
| case eSymbolTypeCommonBlock: |
| return AddressClass::eDebug; |
| case eSymbolTypeBlock: |
| return AddressClass::eDebug; |
| case eSymbolTypeLocal: |
| return AddressClass::eData; |
| case eSymbolTypeParam: |
| return AddressClass::eData; |
| case eSymbolTypeVariable: |
| return AddressClass::eData; |
| case eSymbolTypeVariableType: |
| return AddressClass::eDebug; |
| case eSymbolTypeLineEntry: |
| return AddressClass::eDebug; |
| case eSymbolTypeLineHeader: |
| return AddressClass::eDebug; |
| case eSymbolTypeScopeBegin: |
| return AddressClass::eDebug; |
| case eSymbolTypeScopeEnd: |
| return AddressClass::eDebug; |
| case eSymbolTypeAdditional: |
| return AddressClass::eUnknown; |
| case eSymbolTypeCompiler: |
| return AddressClass::eDebug; |
| case eSymbolTypeInstrumentation: |
| return AddressClass::eDebug; |
| case eSymbolTypeUndefined: |
| return AddressClass::eUnknown; |
| case eSymbolTypeObjCClass: |
| return AddressClass::eRuntime; |
| case eSymbolTypeObjCMetaClass: |
| return AddressClass::eRuntime; |
| case eSymbolTypeObjCIVar: |
| return AddressClass::eRuntime; |
| case eSymbolTypeReExported: |
| return AddressClass::eRuntime; |
| } |
| } |
| return AddressClass::eUnknown; |
| } |
| |
| bool ObjectFileMachO::IsStripped() { |
| if (m_dysymtab.cmd == 0) { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const lldb::offset_t load_cmd_offset = offset; |
| |
| llvm::MachO::load_command lc = {}; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == nullptr) |
| break; |
| if (lc.cmd == LC_DYSYMTAB) { |
| m_dysymtab.cmd = lc.cmd; |
| m_dysymtab.cmdsize = lc.cmdsize; |
| if (m_data.GetU32(&offset, &m_dysymtab.ilocalsym, |
| (sizeof(m_dysymtab) / sizeof(uint32_t)) - 2) == |
| nullptr) { |
| // Clear m_dysymtab if we were unable to read all items from the |
| // load command |
| ::memset(&m_dysymtab, 0, sizeof(m_dysymtab)); |
| } |
| } |
| offset = load_cmd_offset + lc.cmdsize; |
| } |
| } |
| } |
| if (m_dysymtab.cmd) |
| return m_dysymtab.nlocalsym <= 1; |
| return false; |
| } |
| |
| ObjectFileMachO::EncryptedFileRanges ObjectFileMachO::GetEncryptedFileRanges() { |
| EncryptedFileRanges result; |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| |
| llvm::MachO::encryption_info_command encryption_cmd; |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const lldb::offset_t load_cmd_offset = offset; |
| if (m_data.GetU32(&offset, &encryption_cmd, 2) == nullptr) |
| break; |
| |
| // LC_ENCRYPTION_INFO and LC_ENCRYPTION_INFO_64 have the same sizes for the |
| // 3 fields we care about, so treat them the same. |
| if (encryption_cmd.cmd == LC_ENCRYPTION_INFO || |
| encryption_cmd.cmd == LC_ENCRYPTION_INFO_64) { |
| if (m_data.GetU32(&offset, &encryption_cmd.cryptoff, 3)) { |
| if (encryption_cmd.cryptid != 0) { |
| EncryptedFileRanges::Entry entry; |
| entry.SetRangeBase(encryption_cmd.cryptoff); |
| entry.SetByteSize(encryption_cmd.cryptsize); |
| result.Append(entry); |
| } |
| } |
| } |
| offset = load_cmd_offset + encryption_cmd.cmdsize; |
| } |
| |
| return result; |
| } |
| |
| void ObjectFileMachO::SanitizeSegmentCommand( |
| llvm::MachO::segment_command_64 &seg_cmd, uint32_t cmd_idx) { |
| if (m_length == 0 || seg_cmd.filesize == 0) |
| return; |
| |
| if (IsSharedCacheBinary() && !IsInMemory()) { |
| // In shared cache images, the load commands are relative to the |
| // shared cache file, and not the specific image we are |
| // examining. Let's fix this up so that it looks like a normal |
| // image. |
| if (strncmp(seg_cmd.segname, "__TEXT", sizeof(seg_cmd.segname)) == 0) |
| m_text_address = seg_cmd.vmaddr; |
| if (strncmp(seg_cmd.segname, "__LINKEDIT", sizeof(seg_cmd.segname)) == 0) |
| m_linkedit_original_offset = seg_cmd.fileoff; |
| |
| seg_cmd.fileoff = seg_cmd.vmaddr - m_text_address; |
| } |
| |
| if (seg_cmd.fileoff > m_length) { |
| // We have a load command that says it extends past the end of the file. |
| // This is likely a corrupt file. We don't have any way to return an error |
| // condition here (this method was likely invoked from something like |
| // ObjectFile::GetSectionList()), so we just null out the section contents, |
| // and dump a message to stdout. The most common case here is core file |
| // debugging with a truncated file. |
| const char *lc_segment_name = |
| seg_cmd.cmd == LC_SEGMENT_64 ? "LC_SEGMENT_64" : "LC_SEGMENT"; |
| GetModule()->ReportWarning( |
| "load command %u %s has a fileoff (0x%" PRIx64 |
| ") that extends beyond the end of the file (0x%" PRIx64 |
| "), ignoring this section", |
| cmd_idx, lc_segment_name, seg_cmd.fileoff, m_length); |
| |
| seg_cmd.fileoff = 0; |
| seg_cmd.filesize = 0; |
| } |
| |
| if (seg_cmd.fileoff + seg_cmd.filesize > m_length) { |
| // We have a load command that says it extends past the end of the file. |
| // This is likely a corrupt file. We don't have any way to return an error |
| // condition here (this method was likely invoked from something like |
| // ObjectFile::GetSectionList()), so we just null out the section contents, |
| // and dump a message to stdout. The most common case here is core file |
| // debugging with a truncated file. |
| const char *lc_segment_name = |
| seg_cmd.cmd == LC_SEGMENT_64 ? "LC_SEGMENT_64" : "LC_SEGMENT"; |
| GetModule()->ReportWarning( |
| "load command %u %s has a fileoff + filesize (0x%" PRIx64 |
| ") that extends beyond the end of the file (0x%" PRIx64 |
| "), the segment will be truncated to match", |
| cmd_idx, lc_segment_name, seg_cmd.fileoff + seg_cmd.filesize, m_length); |
| |
| // Truncate the length |
| seg_cmd.filesize = m_length - seg_cmd.fileoff; |
| } |
| } |
| |
| static uint32_t |
| GetSegmentPermissions(const llvm::MachO::segment_command_64 &seg_cmd) { |
| uint32_t result = 0; |
| if (seg_cmd.initprot & VM_PROT_READ) |
| result |= ePermissionsReadable; |
| if (seg_cmd.initprot & VM_PROT_WRITE) |
| result |= ePermissionsWritable; |
| if (seg_cmd.initprot & VM_PROT_EXECUTE) |
| result |= ePermissionsExecutable; |
| return result; |
| } |
| |
| static lldb::SectionType GetSectionType(uint32_t flags, |
| ConstString section_name) { |
| |
| if (flags & (S_ATTR_PURE_INSTRUCTIONS | S_ATTR_SOME_INSTRUCTIONS)) |
| return eSectionTypeCode; |
| |
| uint32_t mach_sect_type = flags & SECTION_TYPE; |
| static ConstString g_sect_name_objc_data("__objc_data"); |
| static ConstString g_sect_name_objc_msgrefs("__objc_msgrefs"); |
| static ConstString g_sect_name_objc_selrefs("__objc_selrefs"); |
| static ConstString g_sect_name_objc_classrefs("__objc_classrefs"); |
| static ConstString g_sect_name_objc_superrefs("__objc_superrefs"); |
| static ConstString g_sect_name_objc_const("__objc_const"); |
| static ConstString g_sect_name_objc_classlist("__objc_classlist"); |
| static ConstString g_sect_name_cfstring("__cfstring"); |
| |
| static ConstString g_sect_name_dwarf_debug_abbrev("__debug_abbrev"); |
| static ConstString g_sect_name_dwarf_debug_aranges("__debug_aranges"); |
| static ConstString g_sect_name_dwarf_debug_frame("__debug_frame"); |
| static ConstString g_sect_name_dwarf_debug_info("__debug_info"); |
| static ConstString g_sect_name_dwarf_debug_line("__debug_line"); |
| static ConstString g_sect_name_dwarf_debug_loc("__debug_loc"); |
| static ConstString g_sect_name_dwarf_debug_loclists("__debug_loclists"); |
| static ConstString g_sect_name_dwarf_debug_macinfo("__debug_macinfo"); |
| static ConstString g_sect_name_dwarf_debug_names("__debug_names"); |
| static ConstString g_sect_name_dwarf_debug_pubnames("__debug_pubnames"); |
| static ConstString g_sect_name_dwarf_debug_pubtypes("__debug_pubtypes"); |
| static ConstString g_sect_name_dwarf_debug_ranges("__debug_ranges"); |
| static ConstString g_sect_name_dwarf_debug_str("__debug_str"); |
| static ConstString g_sect_name_dwarf_debug_types("__debug_types"); |
| static ConstString g_sect_name_dwarf_apple_names("__apple_names"); |
| static ConstString g_sect_name_dwarf_apple_types("__apple_types"); |
| static ConstString g_sect_name_dwarf_apple_namespaces("__apple_namespac"); |
| static ConstString g_sect_name_dwarf_apple_objc("__apple_objc"); |
| static ConstString g_sect_name_eh_frame("__eh_frame"); |
| static ConstString g_sect_name_compact_unwind("__unwind_info"); |
| static ConstString g_sect_name_text("__text"); |
| static ConstString g_sect_name_data("__data"); |
| static ConstString g_sect_name_go_symtab("__gosymtab"); |
| |
| if (section_name == g_sect_name_dwarf_debug_abbrev) |
| return eSectionTypeDWARFDebugAbbrev; |
| if (section_name == g_sect_name_dwarf_debug_aranges) |
| return eSectionTypeDWARFDebugAranges; |
| if (section_name == g_sect_name_dwarf_debug_frame) |
| return eSectionTypeDWARFDebugFrame; |
| if (section_name == g_sect_name_dwarf_debug_info) |
| return eSectionTypeDWARFDebugInfo; |
| if (section_name == g_sect_name_dwarf_debug_line) |
| return eSectionTypeDWARFDebugLine; |
| if (section_name == g_sect_name_dwarf_debug_loc) |
| return eSectionTypeDWARFDebugLoc; |
| if (section_name == g_sect_name_dwarf_debug_loclists) |
| return eSectionTypeDWARFDebugLocLists; |
| if (section_name == g_sect_name_dwarf_debug_macinfo) |
| return eSectionTypeDWARFDebugMacInfo; |
| if (section_name == g_sect_name_dwarf_debug_names) |
| return eSectionTypeDWARFDebugNames; |
| if (section_name == g_sect_name_dwarf_debug_pubnames) |
| return eSectionTypeDWARFDebugPubNames; |
| if (section_name == g_sect_name_dwarf_debug_pubtypes) |
| return eSectionTypeDWARFDebugPubTypes; |
| if (section_name == g_sect_name_dwarf_debug_ranges) |
| return eSectionTypeDWARFDebugRanges; |
| if (section_name == g_sect_name_dwarf_debug_str) |
| return eSectionTypeDWARFDebugStr; |
| if (section_name == g_sect_name_dwarf_debug_types) |
| return eSectionTypeDWARFDebugTypes; |
| if (section_name == g_sect_name_dwarf_apple_names) |
| return eSectionTypeDWARFAppleNames; |
| if (section_name == g_sect_name_dwarf_apple_types) |
| return eSectionTypeDWARFAppleTypes; |
| if (section_name == g_sect_name_dwarf_apple_namespaces) |
| return eSectionTypeDWARFAppleNamespaces; |
| if (section_name == g_sect_name_dwarf_apple_objc) |
| return eSectionTypeDWARFAppleObjC; |
| if (section_name == g_sect_name_objc_selrefs) |
| return eSectionTypeDataCStringPointers; |
| if (section_name == g_sect_name_objc_msgrefs) |
| return eSectionTypeDataObjCMessageRefs; |
| if (section_name == g_sect_name_eh_frame) |
| return eSectionTypeEHFrame; |
| if (section_name == g_sect_name_compact_unwind) |
| return eSectionTypeCompactUnwind; |
| if (section_name == g_sect_name_cfstring) |
| return eSectionTypeDataObjCCFStrings; |
| if (section_name == g_sect_name_go_symtab) |
| return eSectionTypeGoSymtab; |
| if (section_name == g_sect_name_objc_data || |
| section_name == g_sect_name_objc_classrefs || |
| section_name == g_sect_name_objc_superrefs || |
| section_name == g_sect_name_objc_const || |
| section_name == g_sect_name_objc_classlist) { |
| return eSectionTypeDataPointers; |
| } |
| |
| switch (mach_sect_type) { |
| // TODO: categorize sections by other flags for regular sections |
| case S_REGULAR: |
| if (section_name == g_sect_name_text) |
| return eSectionTypeCode; |
| if (section_name == g_sect_name_data) |
| return eSectionTypeData; |
| return eSectionTypeOther; |
| case S_ZEROFILL: |
| return eSectionTypeZeroFill; |
| case S_CSTRING_LITERALS: // section with only literal C strings |
| return eSectionTypeDataCString; |
| case S_4BYTE_LITERALS: // section with only 4 byte literals |
| return eSectionTypeData4; |
| case S_8BYTE_LITERALS: // section with only 8 byte literals |
| return eSectionTypeData8; |
| case S_LITERAL_POINTERS: // section with only pointers to literals |
| return eSectionTypeDataPointers; |
| case S_NON_LAZY_SYMBOL_POINTERS: // section with only non-lazy symbol pointers |
| return eSectionTypeDataPointers; |
| case S_LAZY_SYMBOL_POINTERS: // section with only lazy symbol pointers |
| return eSectionTypeDataPointers; |
| case S_SYMBOL_STUBS: // section with only symbol stubs, byte size of stub in |
| // the reserved2 field |
| return eSectionTypeCode; |
| case S_MOD_INIT_FUNC_POINTERS: // section with only function pointers for |
| // initialization |
| return eSectionTypeDataPointers; |
| case S_MOD_TERM_FUNC_POINTERS: // section with only function pointers for |
| // termination |
| return eSectionTypeDataPointers; |
| case S_COALESCED: |
| return eSectionTypeOther; |
| case S_GB_ZEROFILL: |
| return eSectionTypeZeroFill; |
| case S_INTERPOSING: // section with only pairs of function pointers for |
| // interposing |
| return eSectionTypeCode; |
| case S_16BYTE_LITERALS: // section with only 16 byte literals |
| return eSectionTypeData16; |
| case S_DTRACE_DOF: |
| return eSectionTypeDebug; |
| case S_LAZY_DYLIB_SYMBOL_POINTERS: |
| return eSectionTypeDataPointers; |
| default: |
| return eSectionTypeOther; |
| } |
| } |
| |
| struct ObjectFileMachO::SegmentParsingContext { |
| const EncryptedFileRanges EncryptedRanges; |
| lldb_private::SectionList &UnifiedList; |
| uint32_t NextSegmentIdx = 0; |
| uint32_t NextSectionIdx = 0; |
| bool FileAddressesChanged = false; |
| |
| SegmentParsingContext(EncryptedFileRanges EncryptedRanges, |
| lldb_private::SectionList &UnifiedList) |
| : EncryptedRanges(std::move(EncryptedRanges)), UnifiedList(UnifiedList) {} |
| }; |
| |
| void ObjectFileMachO::ProcessSegmentCommand( |
| const llvm::MachO::load_command &load_cmd_, lldb::offset_t offset, |
| uint32_t cmd_idx, SegmentParsingContext &context) { |
| llvm::MachO::segment_command_64 load_cmd; |
| memcpy(&load_cmd, &load_cmd_, sizeof(load_cmd_)); |
| |
| if (!m_data.GetU8(&offset, (uint8_t *)load_cmd.segname, 16)) |
| return; |
| |
| ModuleSP module_sp = GetModule(); |
| const bool is_core = GetType() == eTypeCoreFile; |
| const bool is_dsym = (m_header.filetype == MH_DSYM); |
| bool add_section = true; |
| bool add_to_unified = true; |
| ConstString const_segname( |
| load_cmd.segname, strnlen(load_cmd.segname, sizeof(load_cmd.segname))); |
| |
| SectionSP unified_section_sp( |
| context.UnifiedList.FindSectionByName(const_segname)); |
| if (is_dsym && unified_section_sp) { |
| if (const_segname == GetSegmentNameLINKEDIT()) { |
| // We need to keep the __LINKEDIT segment private to this object file |
| // only |
| add_to_unified = false; |
| } else { |
| // This is the dSYM file and this section has already been created by the |
| // object file, no need to create it. |
| add_section = false; |
| } |
| } |
| load_cmd.vmaddr = m_data.GetAddress(&offset); |
| load_cmd.vmsize = m_data.GetAddress(&offset); |
| load_cmd.fileoff = m_data.GetAddress(&offset); |
| load_cmd.filesize = m_data.GetAddress(&offset); |
| if (!m_data.GetU32(&offset, &load_cmd.maxprot, 4)) |
| return; |
| |
| SanitizeSegmentCommand(load_cmd, cmd_idx); |
| |
| const uint32_t segment_permissions = GetSegmentPermissions(load_cmd); |
| const bool segment_is_encrypted = |
| (load_cmd.flags & SG_PROTECTED_VERSION_1) != 0; |
| |
| // Keep a list of mach segments around in case we need to get at data that |
| // isn't stored in the abstracted Sections. |
| m_mach_segments.push_back(load_cmd); |
| |
| // Use a segment ID of the segment index shifted left by 8 so they never |
| // conflict with any of the sections. |
| SectionSP segment_sp; |
| if (add_section && (const_segname || is_core)) { |
| segment_sp = std::make_shared<Section>( |
| module_sp, // Module to which this section belongs |
| this, // Object file to which this sections belongs |
| ++context.NextSegmentIdx |
| << 8, // Section ID is the 1 based segment index |
| // shifted right by 8 bits as not to collide with any of the 256 |
| // section IDs that are possible |
| const_segname, // Name of this section |
| eSectionTypeContainer, // This section is a container of other |
| // sections. |
| load_cmd.vmaddr, // File VM address == addresses as they are |
| // found in the object file |
| load_cmd.vmsize, // VM size in bytes of this section |
| load_cmd.fileoff, // Offset to the data for this section in |
| // the file |
| load_cmd.filesize, // Size in bytes of this section as found |
| // in the file |
| 0, // Segments have no alignment information |
| load_cmd.flags); // Flags for this section |
| |
| segment_sp->SetIsEncrypted(segment_is_encrypted); |
| m_sections_up->AddSection(segment_sp); |
| segment_sp->SetPermissions(segment_permissions); |
| if (add_to_unified) |
| context.UnifiedList.AddSection(segment_sp); |
| } else if (unified_section_sp) { |
| // If this is a dSYM and the file addresses in the dSYM differ from the |
| // file addresses in the ObjectFile, we must use the file base address for |
| // the Section from the dSYM for the DWARF to resolve correctly. |
| // This only happens with binaries in the shared cache in practice; |
| // normally a mismatch like this would give a binary & dSYM that do not |
| // match UUIDs. When a binary is included in the shared cache, its |
| // segments are rearranged to optimize the shared cache, so its file |
| // addresses will differ from what the ObjectFile had originally, |
| // and what the dSYM has. |
| if (is_dsym && unified_section_sp->GetFileAddress() != load_cmd.vmaddr) { |
| Log *log = GetLog(LLDBLog::Symbols); |
| if (log) { |
| log->Printf( |
| "Installing dSYM's %s segment file address over ObjectFile's " |
| "so symbol table/debug info resolves correctly for %s", |
| const_segname.AsCString(), |
| module_sp->GetFileSpec().GetFilename().AsCString()); |
| } |
| |
| // Make sure we've parsed the symbol table from the ObjectFile before |
| // we go around changing its Sections. |
| module_sp->GetObjectFile()->GetSymtab(); |
| // eh_frame would present the same problems but we parse that on a per- |
| // function basis as-needed so it's more difficult to remove its use of |
| // the Sections. Realistically, the environments where this code path |
| // will be taken will not have eh_frame sections. |
| |
| unified_section_sp->SetFileAddress(load_cmd.vmaddr); |
| |
| // Notify the module that the section addresses have been changed once |
| // we're done so any file-address caches can be updated. |
| context.FileAddressesChanged = true; |
| } |
| m_sections_up->AddSection(unified_section_sp); |
| } |
| |
| llvm::MachO::section_64 sect64; |
| ::memset(§64, 0, sizeof(sect64)); |
| // Push a section into our mach sections for the section at index zero |
| // (NO_SECT) if we don't have any mach sections yet... |
| if (m_mach_sections.empty()) |
| m_mach_sections.push_back(sect64); |
| uint32_t segment_sect_idx; |
| const lldb::user_id_t first_segment_sectID = context.NextSectionIdx + 1; |
| |
| const uint32_t num_u32s = load_cmd.cmd == LC_SEGMENT ? 7 : 8; |
| for (segment_sect_idx = 0; segment_sect_idx < load_cmd.nsects; |
| ++segment_sect_idx) { |
| if (m_data.GetU8(&offset, (uint8_t *)sect64.sectname, |
| sizeof(sect64.sectname)) == nullptr) |
| break; |
| if (m_data.GetU8(&offset, (uint8_t *)sect64.segname, |
| sizeof(sect64.segname)) == nullptr) |
| break; |
| sect64.addr = m_data.GetAddress(&offset); |
| sect64.size = m_data.GetAddress(&offset); |
| |
| if (m_data.GetU32(&offset, §64.offset, num_u32s) == nullptr) |
| break; |
| |
| if (IsSharedCacheBinary() && !IsInMemory()) { |
| sect64.offset = sect64.addr - m_text_address; |
| } |
| |
| // Keep a list of mach sections around in case we need to get at data that |
| // isn't stored in the abstracted Sections. |
| m_mach_sections.push_back(sect64); |
| |
| if (add_section) { |
| ConstString section_name( |
| sect64.sectname, strnlen(sect64.sectname, sizeof(sect64.sectname))); |
| if (!const_segname) { |
| // We have a segment with no name so we need to conjure up segments |
| // that correspond to the section's segname if there isn't already such |
| // a section. If there is such a section, we resize the section so that |
| // it spans all sections. We also mark these sections as fake so |
| // address matches don't hit if they land in the gaps between the child |
| // sections. |
| const_segname.SetTrimmedCStringWithLength(sect64.segname, |
| sizeof(sect64.segname)); |
| segment_sp = context.UnifiedList.FindSectionByName(const_segname); |
| if (segment_sp.get()) { |
| Section *segment = segment_sp.get(); |
| // Grow the section size as needed. |
| const lldb::addr_t sect64_min_addr = sect64.addr; |
| const lldb::addr_t sect64_max_addr = sect64_min_addr + sect64.size; |
| const lldb::addr_t curr_seg_byte_size = segment->GetByteSize(); |
| const lldb::addr_t curr_seg_min_addr = segment->GetFileAddress(); |
| const lldb::addr_t curr_seg_max_addr = |
| curr_seg_min_addr + curr_seg_byte_size; |
| if (sect64_min_addr >= curr_seg_min_addr) { |
| const lldb::addr_t new_seg_byte_size = |
| sect64_max_addr - curr_seg_min_addr; |
| // Only grow the section size if needed |
| if (new_seg_byte_size > curr_seg_byte_size) |
| segment->SetByteSize(new_seg_byte_size); |
| } else { |
| // We need to change the base address of the segment and adjust the |
| // child section offsets for all existing children. |
| const lldb::addr_t slide_amount = |
| sect64_min_addr - curr_seg_min_addr; |
| segment->Slide(slide_amount, false); |
| segment->GetChildren().Slide(-slide_amount, false); |
| segment->SetByteSize(curr_seg_max_addr - sect64_min_addr); |
| } |
| |
| // Grow the section size as needed. |
| if (sect64.offset) { |
| const lldb::addr_t segment_min_file_offset = |
| segment->GetFileOffset(); |
| const lldb::addr_t segment_max_file_offset = |
| segment_min_file_offset + segment->GetFileSize(); |
| |
| const lldb::addr_t section_min_file_offset = sect64.offset; |
| const lldb::addr_t section_max_file_offset = |
| section_min_file_offset + sect64.size; |
| const lldb::addr_t new_file_offset = |
| std::min(section_min_file_offset, segment_min_file_offset); |
| const lldb::addr_t new_file_size = |
| std::max(section_max_file_offset, segment_max_file_offset) - |
| new_file_offset; |
| segment->SetFileOffset(new_file_offset); |
| segment->SetFileSize(new_file_size); |
| } |
| } else { |
| // Create a fake section for the section's named segment |
| segment_sp = std::make_shared<Section>( |
| segment_sp, // Parent section |
| module_sp, // Module to which this section belongs |
| this, // Object file to which this section belongs |
| ++context.NextSegmentIdx |
| << 8, // Section ID is the 1 based segment index |
| // shifted right by 8 bits as not to |
| // collide with any of the 256 section IDs |
| // that are possible |
| const_segname, // Name of this section |
| eSectionTypeContainer, // This section is a container of |
| // other sections. |
| sect64.addr, // File VM address == addresses as they are |
| // found in the object file |
| sect64.size, // VM size in bytes of this section |
| sect64.offset, // Offset to the data for this section in |
| // the file |
| sect64.offset ? sect64.size : 0, // Size in bytes of |
| // this section as |
| // found in the file |
| sect64.align, |
| load_cmd.flags); // Flags for this section |
| segment_sp->SetIsFake(true); |
| segment_sp->SetPermissions(segment_permissions); |
| m_sections_up->AddSection(segment_sp); |
| if (add_to_unified) |
| context.UnifiedList.AddSection(segment_sp); |
| segment_sp->SetIsEncrypted(segment_is_encrypted); |
| } |
| } |
| assert(segment_sp.get()); |
| |
| lldb::SectionType sect_type = GetSectionType(sect64.flags, section_name); |
| |
| SectionSP section_sp(new Section( |
| segment_sp, module_sp, this, ++context.NextSectionIdx, section_name, |
| sect_type, sect64.addr - segment_sp->GetFileAddress(), sect64.size, |
| sect64.offset, sect64.offset == 0 ? 0 : sect64.size, sect64.align, |
| sect64.flags)); |
| // Set the section to be encrypted to match the segment |
| |
| bool section_is_encrypted = false; |
| if (!segment_is_encrypted && load_cmd.filesize != 0) |
| section_is_encrypted = context.EncryptedRanges.FindEntryThatContains( |
| sect64.offset) != nullptr; |
| |
| section_sp->SetIsEncrypted(segment_is_encrypted || section_is_encrypted); |
| section_sp->SetPermissions(segment_permissions); |
| segment_sp->GetChildren().AddSection(section_sp); |
| |
| if (segment_sp->IsFake()) { |
| segment_sp.reset(); |
| const_segname.Clear(); |
| } |
| } |
| } |
| if (segment_sp && is_dsym) { |
| if (first_segment_sectID <= context.NextSectionIdx) { |
| lldb::user_id_t sect_uid; |
| for (sect_uid = first_segment_sectID; sect_uid <= context.NextSectionIdx; |
| ++sect_uid) { |
| SectionSP curr_section_sp( |
| segment_sp->GetChildren().FindSectionByID(sect_uid)); |
| SectionSP next_section_sp; |
| if (sect_uid + 1 <= context.NextSectionIdx) |
| next_section_sp = |
| segment_sp->GetChildren().FindSectionByID(sect_uid + 1); |
| |
| if (curr_section_sp.get()) { |
| if (curr_section_sp->GetByteSize() == 0) { |
| if (next_section_sp.get() != nullptr) |
| curr_section_sp->SetByteSize(next_section_sp->GetFileAddress() - |
| curr_section_sp->GetFileAddress()); |
| else |
| curr_section_sp->SetByteSize(load_cmd.vmsize); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| void ObjectFileMachO::ProcessDysymtabCommand( |
| const llvm::MachO::load_command &load_cmd, lldb::offset_t offset) { |
| m_dysymtab.cmd = load_cmd.cmd; |
| m_dysymtab.cmdsize = load_cmd.cmdsize; |
| m_data.GetU32(&offset, &m_dysymtab.ilocalsym, |
| (sizeof(m_dysymtab) / sizeof(uint32_t)) - 2); |
| } |
| |
| void ObjectFileMachO::CreateSections(SectionList &unified_section_list) { |
| if (m_sections_up) |
| return; |
| |
| m_sections_up = std::make_unique<SectionList>(); |
| |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| // bool dump_sections = false; |
| ModuleSP module_sp(GetModule()); |
| |
| offset = MachHeaderSizeFromMagic(m_header.magic); |
| |
| SegmentParsingContext context(GetEncryptedFileRanges(), unified_section_list); |
| llvm::MachO::load_command load_cmd; |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const lldb::offset_t load_cmd_offset = offset; |
| if (m_data.GetU32(&offset, &load_cmd, 2) == nullptr) |
| break; |
| |
| if (load_cmd.cmd == LC_SEGMENT || load_cmd.cmd == LC_SEGMENT_64) |
| ProcessSegmentCommand(load_cmd, offset, i, context); |
| else if (load_cmd.cmd == LC_DYSYMTAB) |
| ProcessDysymtabCommand(load_cmd, offset); |
| |
| offset = load_cmd_offset + load_cmd.cmdsize; |
| } |
| |
| if (context.FileAddressesChanged && module_sp) |
| module_sp->SectionFileAddressesChanged(); |
| } |
| |
| class MachSymtabSectionInfo { |
| public: |
| MachSymtabSectionInfo(SectionList *section_list) |
| : m_section_list(section_list), m_section_infos() { |
| // Get the number of sections down to a depth of 1 to include all segments |
| // and their sections, but no other sections that may be added for debug |
| // map or |
| m_section_infos.resize(section_list->GetNumSections(1)); |
| } |
| |
| SectionSP GetSection(uint8_t n_sect, addr_t file_addr) { |
| if (n_sect == 0) |
| return SectionSP(); |
| if (n_sect < m_section_infos.size()) { |
| if (!m_section_infos[n_sect].section_sp) { |
| SectionSP section_sp(m_section_list->FindSectionByID(n_sect)); |
| m_section_infos[n_sect].section_sp = section_sp; |
| if (section_sp) { |
| m_section_infos[n_sect].vm_range.SetBaseAddress( |
| section_sp->GetFileAddress()); |
| m_section_infos[n_sect].vm_range.SetByteSize( |
| section_sp->GetByteSize()); |
| } else { |
| std::string filename = "<unknown>"; |
| SectionSP first_section_sp(m_section_list->GetSectionAtIndex(0)); |
| if (first_section_sp) |
| filename = first_section_sp->GetObjectFile()->GetFileSpec().GetPath(); |
| |
| Debugger::ReportError( |
| llvm::formatv("unable to find section {0} for a symbol in " |
| "{1}, corrupt file?", |
| n_sect, filename)); |
| } |
| } |
| if (m_section_infos[n_sect].vm_range.Contains(file_addr)) { |
| // Symbol is in section. |
| return m_section_infos[n_sect].section_sp; |
| } else if (m_section_infos[n_sect].vm_range.GetByteSize() == 0 && |
| m_section_infos[n_sect].vm_range.GetBaseAddress() == |
| file_addr) { |
| // Symbol is in section with zero size, but has the same start address |
| // as the section. This can happen with linker symbols (symbols that |
| // start with the letter 'l' or 'L'. |
| return m_section_infos[n_sect].section_sp; |
| } |
| } |
| return m_section_list->FindSectionContainingFileAddress(file_addr); |
| } |
| |
| protected: |
| struct SectionInfo { |
| SectionInfo() : vm_range(), section_sp() {} |
| |
| VMRange vm_range; |
| SectionSP section_sp; |
| }; |
| SectionList *m_section_list; |
| std::vector<SectionInfo> m_section_infos; |
| }; |
| |
| #define TRIE_SYMBOL_IS_THUMB (1ULL << 63) |
| struct TrieEntry { |
| void Dump() const { |
| printf("0x%16.16llx 0x%16.16llx 0x%16.16llx \"%s\"", |
| static_cast<unsigned long long>(address), |
| static_cast<unsigned long long>(flags), |
| static_cast<unsigned long long>(other), name.GetCString()); |
| if (import_name) |
| printf(" -> \"%s\"\n", import_name.GetCString()); |
| else |
| printf("\n"); |
| } |
| ConstString name; |
| uint64_t address = LLDB_INVALID_ADDRESS; |
| uint64_t flags = |
| 0; // EXPORT_SYMBOL_FLAGS_REEXPORT, EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER, |
| // TRIE_SYMBOL_IS_THUMB |
| uint64_t other = 0; |
| ConstString import_name; |
| }; |
| |
| struct TrieEntryWithOffset { |
| lldb::offset_t nodeOffset; |
| TrieEntry entry; |
| |
| TrieEntryWithOffset(lldb::offset_t offset) : nodeOffset(offset), entry() {} |
| |
| void Dump(uint32_t idx) const { |
| printf("[%3u] 0x%16.16llx: ", idx, |
| static_cast<unsigned long long>(nodeOffset)); |
| entry.Dump(); |
| } |
| |
| bool operator<(const TrieEntryWithOffset &other) const { |
| return (nodeOffset < other.nodeOffset); |
| } |
| }; |
| |
| static bool ParseTrieEntries(DataExtractor &data, lldb::offset_t offset, |
| const bool is_arm, addr_t text_seg_base_addr, |
| std::vector<llvm::StringRef> &nameSlices, |
| std::set<lldb::addr_t> &resolver_addresses, |
| std::vector<TrieEntryWithOffset> &reexports, |
| std::vector<TrieEntryWithOffset> &ext_symbols) { |
| if (!data.ValidOffset(offset)) |
| return true; |
| |
| // Terminal node -- end of a branch, possibly add this to |
| // the symbol table or resolver table. |
| const uint64_t terminalSize = data.GetULEB128(&offset); |
| lldb::offset_t children_offset = offset + terminalSize; |
| if (terminalSize != 0) { |
| TrieEntryWithOffset e(offset); |
| e.entry.flags = data.GetULEB128(&offset); |
| const char *import_name = nullptr; |
| if (e.entry.flags & EXPORT_SYMBOL_FLAGS_REEXPORT) { |
| e.entry.address = 0; |
| e.entry.other = data.GetULEB128(&offset); // dylib ordinal |
| import_name = data.GetCStr(&offset); |
| } else { |
| e.entry.address = data.GetULEB128(&offset); |
| if (text_seg_base_addr != LLDB_INVALID_ADDRESS) |
| e.entry.address += text_seg_base_addr; |
| if (e.entry.flags & EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER) { |
| e.entry.other = data.GetULEB128(&offset); |
| uint64_t resolver_addr = e.entry.other; |
| if (text_seg_base_addr != LLDB_INVALID_ADDRESS) |
| resolver_addr += text_seg_base_addr; |
| if (is_arm) |
| resolver_addr &= THUMB_ADDRESS_BIT_MASK; |
| resolver_addresses.insert(resolver_addr); |
| } else |
| e.entry.other = 0; |
| } |
| bool add_this_entry = false; |
| if (Flags(e.entry.flags).Test(EXPORT_SYMBOL_FLAGS_REEXPORT) && |
| import_name && import_name[0]) { |
| // add symbols that are reexport symbols with a valid import name. |
| add_this_entry = true; |
| } else if (e.entry.flags == 0 && |
| (import_name == nullptr || import_name[0] == '\0')) { |
| // add externally visible symbols, in case the nlist record has |
| // been stripped/omitted. |
| add_this_entry = true; |
| } |
| if (add_this_entry) { |
| std::string name; |
| if (!nameSlices.empty()) { |
| for (auto name_slice : nameSlices) |
| name.append(name_slice.data(), name_slice.size()); |
| } |
| if (name.size() > 1) { |
| // Skip the leading '_' |
| e.entry.name.SetCStringWithLength(name.c_str() + 1, name.size() - 1); |
| } |
| if (import_name) { |
| // Skip the leading '_' |
| e.entry.import_name.SetCString(import_name + 1); |
| } |
| if (Flags(e.entry.flags).Test(EXPORT_SYMBOL_FLAGS_REEXPORT)) { |
| reexports.push_back(e); |
| } else { |
| if (is_arm && (e.entry.address & 1)) { |
| e.entry.flags |= TRIE_SYMBOL_IS_THUMB; |
| e.entry.address &= THUMB_ADDRESS_BIT_MASK; |
| } |
| ext_symbols.push_back(e); |
| } |
| } |
| } |
| |
| const uint8_t childrenCount = data.GetU8(&children_offset); |
| for (uint8_t i = 0; i < childrenCount; ++i) { |
| const char *cstr = data.GetCStr(&children_offset); |
| if (cstr) |
| nameSlices.push_back(llvm::StringRef(cstr)); |
| else |
| return false; // Corrupt data |
| lldb::offset_t childNodeOffset = data.GetULEB128(&children_offset); |
| if (childNodeOffset) { |
| if (!ParseTrieEntries(data, childNodeOffset, is_arm, text_seg_base_addr, |
| nameSlices, resolver_addresses, reexports, |
| ext_symbols)) { |
| return false; |
| } |
| } |
| nameSlices.pop_back(); |
| } |
| return true; |
| } |
| |
| static SymbolType GetSymbolType(const char *&symbol_name, |
| bool &demangled_is_synthesized, |
| const SectionSP &text_section_sp, |
| const SectionSP &data_section_sp, |
| const SectionSP &data_dirty_section_sp, |
| const SectionSP &data_const_section_sp, |
| const SectionSP &symbol_section) { |
| SymbolType type = eSymbolTypeInvalid; |
| |
| const char *symbol_sect_name = symbol_section->GetName().AsCString(); |
| if (symbol_section->IsDescendant(text_section_sp.get())) { |
| if (symbol_section->IsClear(S_ATTR_PURE_INSTRUCTIONS | |
| S_ATTR_SELF_MODIFYING_CODE | |
| S_ATTR_SOME_INSTRUCTIONS)) |
| type = eSymbolTypeData; |
| else |
| type = eSymbolTypeCode; |
| } else if (symbol_section->IsDescendant(data_section_sp.get()) || |
| symbol_section->IsDescendant(data_dirty_section_sp.get()) || |
| symbol_section->IsDescendant(data_const_section_sp.get())) { |
| if (symbol_sect_name && |
| ::strstr(symbol_sect_name, "__objc") == symbol_sect_name) { |
| type = eSymbolTypeRuntime; |
| |
| if (symbol_name) { |
| llvm::StringRef symbol_name_ref(symbol_name); |
| if (symbol_name_ref.startswith("OBJC_")) { |
| static const llvm::StringRef g_objc_v2_prefix_class("OBJC_CLASS_$_"); |
| static const llvm::StringRef g_objc_v2_prefix_metaclass( |
| "OBJC_METACLASS_$_"); |
| static const llvm::StringRef g_objc_v2_prefix_ivar("OBJC_IVAR_$_"); |
| if (symbol_name_ref.startswith(g_objc_v2_prefix_class)) { |
| symbol_name = symbol_name + g_objc_v2_prefix_class.size(); |
| type = eSymbolTypeObjCClass; |
| demangled_is_synthesized = true; |
| } else if (symbol_name_ref.startswith(g_objc_v2_prefix_metaclass)) { |
| symbol_name = symbol_name + g_objc_v2_prefix_metaclass.size(); |
| type = eSymbolTypeObjCMetaClass; |
| demangled_is_synthesized = true; |
| } else if (symbol_name_ref.startswith(g_objc_v2_prefix_ivar)) { |
| symbol_name = symbol_name + g_objc_v2_prefix_ivar.size(); |
| type = eSymbolTypeObjCIVar; |
| demangled_is_synthesized = true; |
| } |
| } |
| } |
| } else if (symbol_sect_name && |
| ::strstr(symbol_sect_name, "__gcc_except_tab") == |
| symbol_sect_name) { |
| type = eSymbolTypeException; |
| } else { |
| type = eSymbolTypeData; |
| } |
| } else if (symbol_sect_name && |
| ::strstr(symbol_sect_name, "__IMPORT") == symbol_sect_name) { |
| type = eSymbolTypeTrampoline; |
| } |
| return type; |
| } |
| |
| // Read the UUID out of a dyld_shared_cache file on-disk. |
| UUID ObjectFileMachO::GetSharedCacheUUID(FileSpec dyld_shared_cache, |
| const ByteOrder byte_order, |
| const uint32_t addr_byte_size) { |
| UUID dsc_uuid; |
| DataBufferSP DscData = MapFileData( |
| dyld_shared_cache, sizeof(struct lldb_copy_dyld_cache_header_v1), 0); |
| if (!DscData) |
| return dsc_uuid; |
| DataExtractor dsc_header_data(DscData, byte_order, addr_byte_size); |
| |
| char version_str[7]; |
| lldb::offset_t offset = 0; |
| memcpy(version_str, dsc_header_data.GetData(&offset, 6), 6); |
| version_str[6] = '\0'; |
| if (strcmp(version_str, "dyld_v") == 0) { |
| offset = offsetof(struct lldb_copy_dyld_cache_header_v1, uuid); |
| dsc_uuid = UUID::fromOptionalData( |
| dsc_header_data.GetData(&offset, sizeof(uuid_t)), sizeof(uuid_t)); |
| } |
| Log *log = GetLog(LLDBLog::Symbols); |
| if (log && dsc_uuid.IsValid()) { |
| LLDB_LOGF(log, "Shared cache %s has UUID %s", |
| dyld_shared_cache.GetPath().c_str(), |
| dsc_uuid.GetAsString().c_str()); |
| } |
| return dsc_uuid; |
| } |
| |
| static llvm::Optional<struct nlist_64> |
| ParseNList(DataExtractor &nlist_data, lldb::offset_t &nlist_data_offset, |
| size_t nlist_byte_size) { |
| struct nlist_64 nlist; |
| if (!nlist_data.ValidOffsetForDataOfSize(nlist_data_offset, nlist_byte_size)) |
| return {}; |
| nlist.n_strx = nlist_data.GetU32_unchecked(&nlist_data_offset); |
| nlist.n_type = nlist_data.GetU8_unchecked(&nlist_data_offset); |
| nlist.n_sect = nlist_data.GetU8_unchecked(&nlist_data_offset); |
| nlist.n_desc = nlist_data.GetU16_unchecked(&nlist_data_offset); |
| nlist.n_value = nlist_data.GetAddress_unchecked(&nlist_data_offset); |
| return nlist; |
| } |
| |
| enum { DebugSymbols = true, NonDebugSymbols = false }; |
| |
| void ObjectFileMachO::ParseSymtab(Symtab &symtab) { |
| ModuleSP module_sp(GetModule()); |
| if (!module_sp) |
| return; |
| |
| const FileSpec &file = m_file ? m_file : module_sp->GetFileSpec(); |
| const char *file_name = file.GetFilename().AsCString("<Unknown>"); |
| LLDB_SCOPED_TIMERF("ObjectFileMachO::ParseSymtab () module = %s", file_name); |
| Progress progress(llvm::formatv("Parsing symbol table for {0}", file_name)); |
| |
| llvm::MachO::symtab_command symtab_load_command = {0, 0, 0, 0, 0, 0}; |
| llvm::MachO::linkedit_data_command function_starts_load_command = {0, 0, 0, 0}; |
| llvm::MachO::linkedit_data_command exports_trie_load_command = {0, 0, 0, 0}; |
| llvm::MachO::dyld_info_command dyld_info = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; |
| llvm::MachO::dysymtab_command dysymtab = m_dysymtab; |
| // The data element of type bool indicates that this entry is thumb |
| // code. |
| typedef AddressDataArray<lldb::addr_t, bool, 100> FunctionStarts; |
| |
| // Record the address of every function/data that we add to the symtab. |
| // We add symbols to the table in the order of most information (nlist |
| // records) to least (function starts), and avoid duplicating symbols |
| // via this set. |
| llvm::DenseSet<addr_t> symbols_added; |
| |
| // We are using a llvm::DenseSet for "symbols_added" so we must be sure we |
| // do not add the tombstone or empty keys to the set. |
| auto add_symbol_addr = [&symbols_added](lldb::addr_t file_addr) { |
| // Don't add the tombstone or empty keys. |
| if (file_addr == UINT64_MAX || file_addr == UINT64_MAX - 1) |
| return; |
| symbols_added.insert(file_addr); |
| }; |
| FunctionStarts function_starts; |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| uint32_t i; |
| FileSpecList dylib_files; |
| Log *log = GetLog(LLDBLog::Symbols); |
| llvm::StringRef g_objc_v2_prefix_class("_OBJC_CLASS_$_"); |
| llvm::StringRef g_objc_v2_prefix_metaclass("_OBJC_METACLASS_$_"); |
| llvm::StringRef g_objc_v2_prefix_ivar("_OBJC_IVAR_$_"); |
| UUID image_uuid; |
| |
| for (i = 0; i < m_header.ncmds; ++i) { |
| const lldb::offset_t cmd_offset = offset; |
| // Read in the load command and load command size |
| llvm::MachO::load_command lc; |
| if (m_data.GetU32(&offset, &lc, 2) == nullptr) |
| break; |
| // Watch for the symbol table load command |
| switch (lc.cmd) { |
| case LC_SYMTAB: |
| symtab_load_command.cmd = lc.cmd; |
| symtab_load_command.cmdsize = lc.cmdsize; |
| // Read in the rest of the symtab load command |
| if (m_data.GetU32(&offset, &symtab_load_command.symoff, 4) == |
| nullptr) // fill in symoff, nsyms, stroff, strsize fields |
| return; |
| break; |
| |
| case LC_DYLD_INFO: |
| case LC_DYLD_INFO_ONLY: |
| if (m_data.GetU32(&offset, &dyld_info.rebase_off, 10)) { |
| dyld_info.cmd = lc.cmd; |
| dyld_info.cmdsize = lc.cmdsize; |
| } else { |
| memset(&dyld_info, 0, sizeof(dyld_info)); |
| } |
| break; |
| |
| case LC_LOAD_DYLIB: |
| case LC_LOAD_WEAK_DYLIB: |
| case LC_REEXPORT_DYLIB: |
| case LC_LOADFVMLIB: |
| case LC_LOAD_UPWARD_DYLIB: { |
| uint32_t name_offset = cmd_offset + m_data.GetU32(&offset); |
| const char *path = m_data.PeekCStr(name_offset); |
| if (path) { |
| FileSpec file_spec(path); |
| // Strip the path if there is @rpath, @executable, etc so we just use |
| // the basename |
| if (path[0] == '@') |
| file_spec.ClearDirectory(); |
| |
| if (lc.cmd == LC_REEXPORT_DYLIB) { |
| m_reexported_dylibs.AppendIfUnique(file_spec); |
| } |
| |
| dylib_files.Append(file_spec); |
| } |
| } break; |
| |
| case LC_DYLD_EXPORTS_TRIE: |
| exports_trie_load_command.cmd = lc.cmd; |
| exports_trie_load_command.cmdsize = lc.cmdsize; |
| if (m_data.GetU32(&offset, &exports_trie_load_command.dataoff, 2) == |
| nullptr) // fill in offset and size fields |
| memset(&exports_trie_load_command, 0, |
| sizeof(exports_trie_load_command)); |
| break; |
| case LC_FUNCTION_STARTS: |
| function_starts_load_command.cmd = lc.cmd; |
| function_starts_load_command.cmdsize = lc.cmdsize; |
| if (m_data.GetU32(&offset, &function_starts_load_command.dataoff, 2) == |
| nullptr) // fill in data offset and size fields |
| memset(&function_starts_load_command, 0, |
| sizeof(function_starts_load_command)); |
| break; |
| |
| case LC_UUID: { |
| const uint8_t *uuid_bytes = m_data.PeekData(offset, 16); |
| |
| if (uuid_bytes) |
| image_uuid = UUID::fromOptionalData(uuid_bytes, 16); |
| break; |
| } |
| |
| default: |
| break; |
| } |
| offset = cmd_offset + lc.cmdsize; |
| } |
| |
| if (!symtab_load_command.cmd) |
| return; |
| |
| SectionList *section_list = GetSectionList(); |
| if (section_list == nullptr) |
| return; |
| |
| const uint32_t addr_byte_size = m_data.GetAddressByteSize(); |
| const ByteOrder byte_order = m_data.GetByteOrder(); |
| bool bit_width_32 = addr_byte_size == 4; |
| const size_t nlist_byte_size = |
| bit_width_32 ? sizeof(struct nlist) : sizeof(struct nlist_64); |
| |
| DataExtractor nlist_data(nullptr, 0, byte_order, addr_byte_size); |
| DataExtractor strtab_data(nullptr, 0, byte_order, addr_byte_size); |
| DataExtractor function_starts_data(nullptr, 0, byte_order, addr_byte_size); |
| DataExtractor indirect_symbol_index_data(nullptr, 0, byte_order, |
| addr_byte_size); |
| DataExtractor dyld_trie_data(nullptr, 0, byte_order, addr_byte_size); |
| |
| const addr_t nlist_data_byte_size = |
| symtab_load_command.nsyms * nlist_byte_size; |
| const addr_t strtab_data_byte_size = symtab_load_command.strsize; |
| addr_t strtab_addr = LLDB_INVALID_ADDRESS; |
| |
| ProcessSP process_sp(m_process_wp.lock()); |
| Process *process = process_sp.get(); |
| |
| uint32_t memory_module_load_level = eMemoryModuleLoadLevelComplete; |
| bool is_shared_cache_image = IsSharedCacheBinary(); |
| bool is_local_shared_cache_image = is_shared_cache_image && !IsInMemory(); |
| SectionSP linkedit_section_sp( |
| section_list->FindSectionByName(GetSegmentNameLINKEDIT())); |
| |
| if (process && m_header.filetype != llvm::MachO::MH_OBJECT && |
| !is_local_shared_cache_image) { |
| Target &target = process->GetTarget(); |
| |
| memory_module_load_level = target.GetMemoryModuleLoadLevel(); |
| |
| // Reading mach file from memory in a process or core file... |
| |
| if (linkedit_section_sp) { |
| addr_t linkedit_load_addr = |
| linkedit_section_sp->GetLoadBaseAddress(&target); |
| if (linkedit_load_addr == LLDB_INVALID_ADDRESS) { |
| // We might be trying to access the symbol table before the |
| // __LINKEDIT's load address has been set in the target. We can't |
| // fail to read the symbol table, so calculate the right address |
| // manually |
| linkedit_load_addr = CalculateSectionLoadAddressForMemoryImage( |
| m_memory_addr, GetMachHeaderSection(), linkedit_section_sp.get()); |
| } |
| |
| const addr_t linkedit_file_offset = linkedit_section_sp->GetFileOffset(); |
| const addr_t symoff_addr = linkedit_load_addr + |
| symtab_load_command.symoff - |
| linkedit_file_offset; |
| strtab_addr = linkedit_load_addr + symtab_load_command.stroff - |
| linkedit_file_offset; |
| |
| // Always load dyld - the dynamic linker - from memory if we didn't |
| // find a binary anywhere else. lldb will not register |
| // dylib/framework/bundle loads/unloads if we don't have the dyld |
| // symbols, we force dyld to load from memory despite the user's |
| // target.memory-module-load-level setting. |
| if (memory_module_load_level == eMemoryModuleLoadLevelComplete || |
| m_header.filetype == llvm::MachO::MH_DYLINKER) { |
| DataBufferSP nlist_data_sp( |
| ReadMemory(process_sp, symoff_addr, nlist_data_byte_size)); |
| if (nlist_data_sp) |
| nlist_data.SetData(nlist_data_sp, 0, nlist_data_sp->GetByteSize()); |
| if (dysymtab.nindirectsyms != 0) { |
| const addr_t indirect_syms_addr = linkedit_load_addr + |
| dysymtab.indirectsymoff - |
| linkedit_file_offset; |
| DataBufferSP indirect_syms_data_sp(ReadMemory( |
| process_sp, indirect_syms_addr, dysymtab.nindirectsyms * 4)); |
| if (indirect_syms_data_sp) |
| indirect_symbol_index_data.SetData( |
| indirect_syms_data_sp, 0, |
| indirect_syms_data_sp->GetByteSize()); |
| // If this binary is outside the shared cache, |
| // cache the string table. |
| // Binaries in the shared cache all share a giant string table, |
| // and we can't share the string tables across multiple |
| // ObjectFileMachO's, so we'd end up re-reading this mega-strtab |
| // for every binary in the shared cache - it would be a big perf |
| // problem. For binaries outside the shared cache, it's faster to |
| // read the entire strtab at once instead of piece-by-piece as we |
| // process the nlist records. |
| if (!is_shared_cache_image) { |
| DataBufferSP strtab_data_sp( |
| ReadMemory(process_sp, strtab_addr, strtab_data_byte_size)); |
| if (strtab_data_sp) { |
| strtab_data.SetData(strtab_data_sp, 0, |
| strtab_data_sp->GetByteSize()); |
| } |
| } |
| } |
| if (memory_module_load_level >= eMemoryModuleLoadLevelPartial) { |
| if (function_starts_load_command.cmd) { |
| const addr_t func_start_addr = |
| linkedit_load_addr + function_starts_load_command.dataoff - |
| linkedit_file_offset; |
| DataBufferSP func_start_data_sp( |
| ReadMemory(process_sp, func_start_addr, |
| function_starts_load_command.datasize)); |
| if (func_start_data_sp) |
| function_starts_data.SetData(func_start_data_sp, 0, |
| func_start_data_sp->GetByteSize()); |
| } |
| } |
| } |
| } |
| } else { |
| if (is_local_shared_cache_image) { |
| // The load commands in shared cache images are relative to the |
| // beginning of the shared cache, not the library image. The |
| // data we get handed when creating the ObjectFileMachO starts |
| // at the beginning of a specific library and spans to the end |
| // of the cache to be able to reach the shared LINKEDIT |
| // segments. We need to convert the load command offsets to be |
| // relative to the beginning of our specific image. |
| lldb::addr_t linkedit_offset = linkedit_section_sp->GetFileOffset(); |
| lldb::offset_t linkedit_slide = |
| linkedit_offset - m_linkedit_original_offset; |
| symtab_load_command.symoff += linkedit_slide; |
| symtab_load_command.stroff += linkedit_slide; |
| dyld_info.export_off += linkedit_slide; |
| dysymtab.indirectsymoff += linkedit_slide; |
| function_starts_load_command.dataoff += linkedit_slide; |
| exports_trie_load_command.dataoff += linkedit_slide; |
| } |
| |
| nlist_data.SetData(m_data, symtab_load_command.symoff, |
| nlist_data_byte_size); |
| strtab_data.SetData(m_data, symtab_load_command.stroff, |
| strtab_data_byte_size); |
| |
| // We shouldn't have exports data from both the LC_DYLD_INFO command |
| // AND the LC_DYLD_EXPORTS_TRIE command in the same binary: |
| lldbassert(!((dyld_info.export_size > 0) |
| && (exports_trie_load_command.datasize > 0))); |
| if (dyld_info.export_size > 0) { |
| dyld_trie_data.SetData(m_data, dyld_info.export_off, |
| dyld_info.export_size); |
| } else if (exports_trie_load_command.datasize > 0) { |
| dyld_trie_data.SetData(m_data, exports_trie_load_command.dataoff, |
| exports_trie_load_command.datasize); |
| } |
| |
| if (dysymtab.nindirectsyms != 0) { |
| indirect_symbol_index_data.SetData(m_data, dysymtab.indirectsymoff, |
| dysymtab.nindirectsyms * 4); |
| } |
| if (function_starts_load_command.cmd) { |
| function_starts_data.SetData(m_data, function_starts_load_command.dataoff, |
| function_starts_load_command.datasize); |
| } |
| } |
| |
| const bool have_strtab_data = strtab_data.GetByteSize() > 0; |
| |
| ConstString g_segment_name_TEXT = GetSegmentNameTEXT(); |
| ConstString g_segment_name_DATA = GetSegmentNameDATA(); |
| ConstString g_segment_name_DATA_DIRTY = GetSegmentNameDATA_DIRTY(); |
| ConstString g_segment_name_DATA_CONST = GetSegmentNameDATA_CONST(); |
| ConstString g_segment_name_OBJC = GetSegmentNameOBJC(); |
| ConstString g_section_name_eh_frame = GetSectionNameEHFrame(); |
| SectionSP text_section_sp( |
| section_list->FindSectionByName(g_segment_name_TEXT)); |
| SectionSP data_section_sp( |
| section_list->FindSectionByName(g_segment_name_DATA)); |
| SectionSP data_dirty_section_sp( |
| section_list->FindSectionByName(g_segment_name_DATA_DIRTY)); |
| SectionSP data_const_section_sp( |
| section_list->FindSectionByName(g_segment_name_DATA_CONST)); |
| SectionSP objc_section_sp( |
| section_list->FindSectionByName(g_segment_name_OBJC)); |
| SectionSP eh_frame_section_sp; |
| if (text_section_sp.get()) |
| eh_frame_section_sp = text_section_sp->GetChildren().FindSectionByName( |
| g_section_name_eh_frame); |
| else |
| eh_frame_section_sp = |
| section_list->FindSectionByName(g_section_name_eh_frame); |
| |
| const bool is_arm = (m_header.cputype == llvm::MachO::CPU_TYPE_ARM); |
| const bool always_thumb = GetArchitecture().IsAlwaysThumbInstructions(); |
| |
| // lldb works best if it knows the start address of all functions in a |
| // module. Linker symbols or debug info are normally the best source of |
| // information for start addr / size but they may be stripped in a released |
| // binary. Two additional sources of information exist in Mach-O binaries: |
| // LC_FUNCTION_STARTS - a list of ULEB128 encoded offsets of each |
| // function's start address in the |
| // binary, relative to the text section. |
| // eh_frame - the eh_frame FDEs have the start addr & size of |
| // each function |
| // LC_FUNCTION_STARTS is the fastest source to read in, and is present on |
| // all modern binaries. |
| // Binaries built to run on older releases may need to use eh_frame |
| // information. |
| |
| if (text_section_sp && function_starts_data.GetByteSize()) { |
| FunctionStarts::Entry function_start_entry; |
| function_start_entry.data = false; |
| lldb::offset_t function_start_offset = 0; |
| function_start_entry.addr = text_section_sp->GetFileAddress(); |
| uint64_t delta; |
| while ((delta = function_starts_data.GetULEB128(&function_start_offset)) > |
| 0) { |
| // Now append the current entry |
| function_start_entry.addr += delta; |
| if (is_arm) { |
| if (function_start_entry.addr & 1) { |
| function_start_entry.addr &= THUMB_ADDRESS_BIT_MASK; |
| function_start_entry.data = true; |
| } else if (always_thumb) { |
| function_start_entry.data = true; |
| } |
| } |
| function_starts.Append(function_start_entry); |
| } |
| } else { |
| // If m_type is eTypeDebugInfo, then this is a dSYM - it will have the |
| // load command claiming an eh_frame but it doesn't actually have the |
| // eh_frame content. And if we have a dSYM, we don't need to do any of |
| // this fill-in-the-missing-symbols works anyway - the debug info should |
| // give us all the functions in the module. |
| if (text_section_sp.get() && eh_frame_section_sp.get() && |
| m_type != eTypeDebugInfo) { |
| DWARFCallFrameInfo eh_frame(*this, eh_frame_section_sp, |
| DWARFCallFrameInfo::EH); |
| DWARFCallFrameInfo::FunctionAddressAndSizeVector functions; |
| eh_frame.GetFunctionAddressAndSizeVector(functions); |
| addr_t text_base_addr = text_section_sp->GetFileAddress(); |
| size_t count = functions.GetSize(); |
| for (size_t i = 0; i < count; ++i) { |
| const DWARFCallFrameInfo::FunctionAddressAndSizeVector::Entry *func = |
| functions.GetEntryAtIndex(i); |
| if (func) { |
| FunctionStarts::Entry function_start_entry; |
| function_start_entry.addr = func->base - text_base_addr; |
| if (is_arm) { |
| if (function_start_entry.addr & 1) { |
| function_start_entry.addr &= THUMB_ADDRESS_BIT_MASK; |
| function_start_entry.data = true; |
| } else if (always_thumb) { |
| function_start_entry.data = true; |
| } |
| } |
| function_starts.Append(function_start_entry); |
| } |
| } |
| } |
| } |
| |
| const size_t function_starts_count = function_starts.GetSize(); |
| |
| // For user process binaries (executables, dylibs, frameworks, bundles), if |
| // we don't have LC_FUNCTION_STARTS/eh_frame section in this binary, we're |
| // going to assume the binary has been stripped. Don't allow assembly |
| // language instruction emulation because we don't know proper function |
| // start boundaries. |
| // |
| // For all other types of binaries (kernels, stand-alone bare board |
| // binaries, kexts), they may not have LC_FUNCTION_STARTS / eh_frame |
| // sections - we should not make any assumptions about them based on that. |
| if (function_starts_count == 0 && CalculateStrata() == eStrataUser) { |
| m_allow_assembly_emulation_unwind_plans = false; |
| Log *unwind_or_symbol_log(GetLog(LLDBLog::Symbols | LLDBLog::Unwind)); |
| |
| if (unwind_or_symbol_log) |
| module_sp->LogMessage( |
| unwind_or_symbol_log, |
| "no LC_FUNCTION_STARTS, will not allow assembly profiled unwinds"); |
| } |
| |
| const user_id_t TEXT_eh_frame_sectID = eh_frame_section_sp.get() |
| ? eh_frame_section_sp->GetID() |
| : static_cast<user_id_t>(NO_SECT); |
| |
| uint32_t N_SO_index = UINT32_MAX; |
| |
| MachSymtabSectionInfo section_info(section_list); |
| std::vector<uint32_t> N_FUN_indexes; |
| std::vector<uint32_t> N_NSYM_indexes; |
| std::vector<uint32_t> N_INCL_indexes; |
| std::vector<uint32_t> N_BRAC_indexes; |
| std::vector<uint32_t> N_COMM_indexes; |
| typedef std::multimap<uint64_t, uint32_t> ValueToSymbolIndexMap; |
| typedef llvm::DenseMap<uint32_t, uint32_t> NListIndexToSymbolIndexMap; |
| typedef llvm::DenseMap<const char *, uint32_t> ConstNameToSymbolIndexMap; |
| ValueToSymbolIndexMap N_FUN_addr_to_sym_idx; |
| ValueToSymbolIndexMap N_STSYM_addr_to_sym_idx; |
| ConstNameToSymbolIndexMap N_GSYM_name_to_sym_idx; |
| // Any symbols that get merged into another will get an entry in this map |
| // so we know |
| NListIndexToSymbolIndexMap m_nlist_idx_to_sym_idx; |
| uint32_t nlist_idx = 0; |
| Symbol *symbol_ptr = nullptr; |
| |
| uint32_t sym_idx = 0; |
| Symbol *sym = nullptr; |
| size_t num_syms = 0; |
| std::string memory_symbol_name; |
| uint32_t unmapped_local_symbols_found = 0; |
| |
| std::vector<TrieEntryWithOffset> reexport_trie_entries; |
| std::vector<TrieEntryWithOffset> external_sym_trie_entries; |
| std::set<lldb::addr_t> resolver_addresses; |
| |
| if (dyld_trie_data.GetByteSize() > 0) { |
| ConstString text_segment_name("__TEXT"); |
| SectionSP text_segment_sp = |
| GetSectionList()->FindSectionByName(text_segment_name); |
| lldb::addr_t text_segment_file_addr = LLDB_INVALID_ADDRESS; |
| if (text_segment_sp) |
| text_segment_file_addr = text_segment_sp->GetFileAddress(); |
| std::vector<llvm::StringRef> nameSlices; |
| ParseTrieEntries(dyld_trie_data, 0, is_arm, text_segment_file_addr, |
| nameSlices, resolver_addresses, reexport_trie_entries, |
| external_sym_trie_entries); |
| } |
| |
| typedef std::set<ConstString> IndirectSymbols; |
| IndirectSymbols indirect_symbol_names; |
| |
| #if TARGET_OS_IPHONE |
| |
| // Some recent builds of the dyld_shared_cache (hereafter: DSC) have been |
| // optimized by moving LOCAL symbols out of the memory mapped portion of |
| // the DSC. The symbol information has all been retained, but it isn't |
| // available in the normal nlist data. However, there *are* duplicate |
| // entries of *some* |
| // LOCAL symbols in the normal nlist data. To handle this situation |
| // correctly, we must first attempt |
| // to parse any DSC unmapped symbol information. If we find any, we set a |
| // flag that tells the normal nlist parser to ignore all LOCAL symbols. |
| |
| if (IsSharedCacheBinary()) { |
| // Before we can start mapping the DSC, we need to make certain the |
| // target process is actually using the cache we can find. |
| |
| // Next we need to determine the correct path for the dyld shared cache. |
| |
| ArchSpec header_arch = GetArchitecture(); |
| |
| UUID dsc_uuid; |
| UUID process_shared_cache_uuid; |
| addr_t process_shared_cache_base_addr; |
| |
| if (process) { |
| GetProcessSharedCacheUUID(process, process_shared_cache_base_addr, |
| process_shared_cache_uuid); |
| } |
| |
| __block bool found_image = false; |
| __block void *nlist_buffer = nullptr; |
| __block unsigned nlist_count = 0; |
| __block char *string_table = nullptr; |
| __block vm_offset_t vm_nlist_memory = 0; |
| __block mach_msg_type_number_t vm_nlist_bytes_read = 0; |
| __block vm_offset_t vm_string_memory = 0; |
| __block mach_msg_type_number_t vm_string_bytes_read = 0; |
| |
| auto _ = llvm::make_scope_exit(^{ |
| if (vm_nlist_memory) |
| vm_deallocate(mach_task_self(), vm_nlist_memory, vm_nlist_bytes_read); |
| if (vm_string_memory) |
| vm_deallocate(mach_task_self(), vm_string_memory, vm_string_bytes_read); |
| }); |
| |
| typedef llvm::DenseMap<ConstString, uint16_t> UndefinedNameToDescMap; |
| typedef llvm::DenseMap<uint32_t, ConstString> SymbolIndexToName; |
| UndefinedNameToDescMap undefined_name_to_desc; |
| SymbolIndexToName reexport_shlib_needs_fixup; |
| |
| dyld_for_each_installed_shared_cache(^(dyld_shared_cache_t shared_cache) { |
| uuid_t cache_uuid; |
| dyld_shared_cache_copy_uuid(shared_cache, &cache_uuid); |
| if (found_image) |
| return; |
| |
| if (process_shared_cache_uuid.IsValid() && |
| process_shared_cache_uuid != UUID::fromOptionalData(&cache_uuid, 16)) |
| return; |
| |
| dyld_shared_cache_for_each_image(shared_cache, ^(dyld_image_t image) { |
| uuid_t dsc_image_uuid; |
| if (found_image) |
| return; |
| |
| dyld_image_copy_uuid(image, &dsc_image_uuid); |
| if (image_uuid != UUID::fromOptionalData(dsc_image_uuid, 16)) |
| return; |
| |
| found_image = true; |
| |
| // Compute the size of the string table. We need to ask dyld for a |
| // new SPI to avoid this step. |
| dyld_image_local_nlist_content_4Symbolication( |
| image, ^(const void *nlistStart, uint64_t nlistCount, |
| const char *stringTable) { |
| if (!nlistStart || !nlistCount) |
| return; |
| |
| // The buffers passed here are valid only inside the block. |
| // Use vm_read to make a cheap copy of them available for our |
| // processing later. |
| kern_return_t ret = |
| vm_read(mach_task_self(), (vm_address_t)nlistStart, |
| nlist_byte_size * nlistCount, &vm_nlist_memory, |
| &vm_nlist_bytes_read); |
| if (ret != KERN_SUCCESS) |
| return; |
| assert(vm_nlist_bytes_read == nlist_byte_size * nlistCount); |
| |
| // We don't know the size of the string table. It's cheaper |
| // to map the whol VM region than to determine the size by |
| // parsing all teh nlist entries. |
| vm_address_t string_address = (vm_address_t)stringTable; |
| vm_size_t region_size; |
| mach_msg_type_number_t info_count = VM_REGION_BASIC_INFO_COUNT_64; |
| vm_region_basic_info_data_t info; |
| memory_object_name_t object; |
| ret = vm_region_64(mach_task_self(), &string_address, |
| ®ion_size, VM_REGION_BASIC_INFO_64, |
| (vm_region_info_t)&info, &info_count, &object); |
| if (ret != KERN_SUCCESS) |
| return; |
| |
| ret = vm_read(mach_task_self(), (vm_address_t)stringTable, |
| region_size - |
| ((vm_address_t)stringTable - string_address), |
| &vm_string_memory, &vm_string_bytes_read); |
| if (ret != KERN_SUCCESS) |
| return; |
| |
| nlist_buffer = (void *)vm_nlist_memory; |
| string_table = (char *)vm_string_memory; |
| nlist_count = nlistCount; |
| }); |
| }); |
| }); |
| if (nlist_buffer) { |
| DataExtractor dsc_local_symbols_data(nlist_buffer, |
| nlist_count * nlist_byte_size, |
| byte_order, addr_byte_size); |
| unmapped_local_symbols_found = nlist_count; |
| |
| // The normal nlist code cannot correctly size the Symbols |
| // array, we need to allocate it here. |
| sym = symtab.Resize( |
| symtab_load_command.nsyms + m_dysymtab.nindirectsyms + |
| unmapped_local_symbols_found - m_dysymtab.nlocalsym); |
| num_syms = symtab.GetNumSymbols(); |
| |
| lldb::offset_t nlist_data_offset = 0; |
| |
| for (uint32_t nlist_index = 0; |
| nlist_index < nlist_count; |
| nlist_index++) { |
| ///////////////////////////// |
| { |
| llvm::Optional<struct nlist_64> nlist_maybe = |
| ParseNList(dsc_local_symbols_data, nlist_data_offset, |
| nlist_byte_size); |
| if (!nlist_maybe) |
| break; |
| struct nlist_64 nlist = *nlist_maybe; |
| |
| SymbolType type = eSymbolTypeInvalid; |
| const char *symbol_name = string_table + nlist.n_strx; |
| |
| if (symbol_name == NULL) { |
| // No symbol should be NULL, even the symbols with no |
| // string values should have an offset zero which |
| // points to an empty C-string |
| Debugger::ReportError(llvm::formatv( |
| "DSC unmapped local symbol[{0}] has invalid " |
| "string table offset {1:x} in {2}, ignoring symbol", |
| nlist_index, nlist.n_strx, |
| module_sp->GetFileSpec().GetPath()); |
| continue; |
| } |
| if (symbol_name[0] == '\0') |
| symbol_name = NULL; |
| |
| const char *symbol_name_non_abi_mangled = NULL; |
| |
| SectionSP symbol_section; |
| uint32_t symbol_byte_size = 0; |
| bool add_nlist = true; |
| bool is_debug = ((nlist.n_type & N_STAB) != 0); |
| bool demangled_is_synthesized = false; |
| bool is_gsym = false; |
| bool set_value = true; |
| |
| assert(sym_idx < num_syms); |
| |
| sym[sym_idx].SetDebug(is_debug); |
| |
| if (is_debug) { |
| switch (nlist.n_type) { |
| case N_GSYM: |
| // global symbol: name,,NO_SECT,type,0 |
| // Sometimes the N_GSYM value contains the address. |
| |
| // FIXME: In the .o files, we have a GSYM and a debug |
| // symbol for all the ObjC data. They |
| // have the same address, but we want to ensure that |
| // we always find only the real symbol, 'cause we |
| // don't currently correctly attribute the |
| // GSYM one to the ObjCClass/Ivar/MetaClass |
| // symbol type. This is a temporary hack to make |
| // sure the ObjectiveC symbols get treated correctly. |
| // To do this right, we should coalesce all the GSYM |
| // & global symbols that have the same address. |
| |
| is_gsym = true; |
| sym[sym_idx].SetExternal(true); |
| |
| if (symbol_name && symbol_name[0] == '_' && |
| symbol_name[1] == 'O') { |
| llvm::StringRef symbol_name_ref(symbol_name); |
| if (symbol_name_ref.startswith( |
| g_objc_v2_prefix_class)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = |
| symbol_name + g_objc_v2_prefix_class.size(); |
| type = eSymbolTypeObjCClass; |
| demangled_is_synthesized = true; |
| |
| } else if (symbol_name_ref.startswith( |
| g_objc_v2_prefix_metaclass)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = |
| symbol_name + g_objc_v2_prefix_metaclass.size(); |
| type = eSymbolTypeObjCMetaClass; |
| demangled_is_synthesized = true; |
| } else if (symbol_name_ref.startswith( |
| g_objc_v2_prefix_ivar)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = |
| symbol_name + g_objc_v2_prefix_ivar.size(); |
| type = eSymbolTypeObjCIVar; |
| demangled_is_synthesized = true; |
| } |
| } else { |
| if (nlist.n_value != 0) |
| symbol_section = section_info.GetSection( |
| nlist.n_sect, nlist.n_value); |
| type = eSymbolTypeData; |
| } |
| break; |
| |
| case N_FNAME: |
| // procedure name (f77 kludge): name,,NO_SECT,0,0 |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_FUN: |
| // procedure: name,,n_sect,linenumber,address |
| if (symbol_name) { |
| type = eSymbolTypeCode; |
| symbol_section = section_info.GetSection( |
| nlist.n_sect, nlist.n_value); |
| |
| N_FUN_addr_to_sym_idx.insert( |
| std::make_pair(nlist.n_value, sym_idx)); |
| // We use the current number of symbols in the |
| // symbol table in lieu of using nlist_idx in case |
| // we ever start trimming entries out |
| N_FUN_indexes.push_back(sym_idx); |
| } else { |
| type = eSymbolTypeCompiler; |
| |
| if (!N_FUN_indexes.empty()) { |
| // Copy the size of the function into the |
| // original |
| // STAB entry so we don't have |
| // to hunt for it later |
| symtab.SymbolAtIndex(N_FUN_indexes.back()) |
| ->SetByteSize(nlist.n_value); |
| N_FUN_indexes.pop_back(); |
| // We don't really need the end function STAB as |
| // it contains the size which we already placed |
| // with the original symbol, so don't add it if |
| // we want a minimal symbol table |
| add_nlist = false; |
| } |
| } |
| break; |
| |
| case N_STSYM: |
| // static symbol: name,,n_sect,type,address |
| N_STSYM_addr_to_sym_idx.insert( |
| std::make_pair(nlist.n_value, sym_idx)); |
| symbol_section = section_info.GetSection(nlist.n_sect, |
| nlist.n_value); |
| if (symbol_name && symbol_name[0]) { |
| type = ObjectFile::GetSymbolTypeFromName( |
| symbol_name + 1, eSymbolTypeData); |
| } |
| break; |
| |
| case N_LCSYM: |
| // .lcomm symbol: name,,n_sect,type,address |
| symbol_section = section_info.GetSection(nlist.n_sect, |
| nlist.n_value); |
| type = eSymbolTypeCommonBlock; |
| break; |
| |
| case N_BNSYM: |
| // We use the current number of symbols in the symbol |
| // table in lieu of using nlist_idx in case we ever |
| // start trimming entries out Skip these if we want |
| // minimal symbol tables |
| add_nlist = false; |
| break; |
| |
| case N_ENSYM: |
| // Set the size of the N_BNSYM to the terminating |
| // index of this N_ENSYM so that we can always skip |
| // the entire symbol if we need to navigate more |
| // quickly at the source level when parsing STABS |
| // Skip these if we want minimal symbol tables |
| add_nlist = false; |
| break; |
| |
| case N_OPT: |
| // emitted with gcc2_compiled and in gcc source |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_RSYM: |
| // register sym: name,,NO_SECT,type,register |
| type = eSymbolTypeVariable; |
| break; |
| |
| case N_SLINE: |
| // src line: 0,,n_sect,linenumber,address |
| symbol_section = section_info.GetSection(nlist.n_sect, |
| nlist.n_value); |
| type = eSymbolTypeLineEntry; |
| break; |
| |
| case N_SSYM: |
| // structure elt: name,,NO_SECT,type,struct_offset |
| type = eSymbolTypeVariableType; |
| break; |
| |
| case N_SO: |
| // source file name |
| type = eSymbolTypeSourceFile; |
| if (symbol_name == NULL) { |
| add_nlist = false; |
| if (N_SO_index != UINT32_MAX) { |
| // Set the size of the N_SO to the terminating |
| // index of this N_SO so that we can always skip |
| // the entire N_SO if we need to navigate more |
| // quickly at the source level when parsing STABS |
| symbol_ptr = symtab.SymbolAtIndex(N_SO_index); |
| symbol_ptr->SetByteSize(sym_idx); |
| symbol_ptr->SetSizeIsSibling(true); |
| } |
| N_NSYM_indexes.clear(); |
| N_INCL_indexes.clear(); |
| N_BRAC_indexes.clear(); |
| N_COMM_indexes.clear(); |
| N_FUN_indexes.clear(); |
| N_SO_index = UINT32_MAX; |
| } else { |
| // We use the current number of symbols in the |
| // symbol table in lieu of using nlist_idx in case |
| // we ever start trimming entries out |
| const bool N_SO_has_full_path = symbol_name[0] == '/'; |
| if (N_SO_has_full_path) { |
| if ((N_SO_index == sym_idx - 1) && |
| ((sym_idx - 1) < num_syms)) { |
| // We have two consecutive N_SO entries where |
| // the first contains a directory and the |
| // second contains a full path. |
| sym[sym_idx - 1].GetMangled().SetValue( |
| ConstString(symbol_name), false); |
| m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1; |
| add_nlist = false; |
| } else { |
| // This is the first entry in a N_SO that |
| // contains a directory or |
| // a full path to the source file |
| N_SO_index = sym_idx; |
| } |
| } else if ((N_SO_index == sym_idx - 1) && |
| ((sym_idx - 1) < num_syms)) { |
| // This is usually the second N_SO entry that |
| // contains just the filename, so here we combine |
| // it with the first one if we are minimizing the |
| // symbol table |
| const char *so_path = sym[sym_idx - 1] |
| .GetMangled() |
| .GetDemangledName() |
| .AsCString(); |
| if (so_path && so_path[0]) { |
| std::string full_so_path(so_path); |
| const size_t double_slash_pos = |
| full_so_path.find("//"); |
| if (double_slash_pos != std::string::npos) { |
| // The linker has been generating bad N_SO |
| // entries with doubled up paths |
| // in the format "%s%s" where the first |
| // string in the DW_AT_comp_dir, and the |
| // second is the directory for the source |
| // file so you end up with a path that looks |
| // like "/tmp/src//tmp/src/" |
| FileSpec so_dir(so_path); |
| if (!FileSystem::Instance().Exists(so_dir)) { |
| so_dir.SetFile( |
| &full_so_path[double_slash_pos + 1], |
| FileSpec::Style::native); |
| if (FileSystem::Instance().Exists(so_dir)) { |
| // Trim off the incorrect path |
| full_so_path.erase(0, double_slash_pos + 1); |
| } |
| } |
| } |
| if (*full_so_path.rbegin() != '/') |
| full_so_path += '/'; |
| full_so_path += symbol_name; |
| sym[sym_idx - 1].GetMangled().SetValue( |
| ConstString(full_so_path.c_str()), false); |
| add_nlist = false; |
| m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1; |
| } |
| } else { |
| // This could be a relative path to a N_SO |
| N_SO_index = sym_idx; |
| } |
| } |
| break; |
| |
| case N_OSO: |
| // object file name: name,,0,0,st_mtime |
| type = eSymbolTypeObjectFile; |
| break; |
| |
| case N_LSYM: |
| // local sym: name,,NO_SECT,type,offset |
| type = eSymbolTypeLocal; |
| break; |
| |
| // INCL scopes |
| case N_BINCL: |
| // include file beginning: name,,NO_SECT,0,sum We use |
| // the current number of symbols in the symbol table |
| // in lieu of using nlist_idx in case we ever start |
| // trimming entries out |
| N_INCL_indexes.push_back(sym_idx); |
| type = eSymbolTypeScopeBegin; |
| break; |
| |
| case N_EINCL: |
| // include file end: name,,NO_SECT,0,0 |
| // Set the size of the N_BINCL to the terminating |
| // index of this N_EINCL so that we can always skip |
| // the entire symbol if we need to navigate more |
| // quickly at the source level when parsing STABS |
| if (!N_INCL_indexes.empty()) { |
| symbol_ptr = |
| symtab.SymbolAtIndex(N_INCL_indexes.back()); |
| symbol_ptr->SetByteSize(sym_idx + 1); |
| symbol_ptr->SetSizeIsSibling(true); |
| N_INCL_indexes.pop_back(); |
| } |
| type = eSymbolTypeScopeEnd; |
| break; |
| |
| case N_SOL: |
| // #included file name: name,,n_sect,0,address |
| type = eSymbolTypeHeaderFile; |
| |
| // We currently don't use the header files on darwin |
| add_nlist = false; |
| break; |
| |
| case N_PARAMS: |
| // compiler parameters: name,,NO_SECT,0,0 |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_VERSION: |
| // compiler version: name,,NO_SECT,0,0 |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_OLEVEL: |
| // compiler -O level: name,,NO_SECT,0,0 |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_PSYM: |
| // parameter: name,,NO_SECT,type,offset |
| type = eSymbolTypeVariable; |
| break; |
| |
| case N_ENTRY: |
| // alternate entry: name,,n_sect,linenumber,address |
| symbol_section = section_info.GetSection(nlist.n_sect, |
| nlist.n_value); |
| type = eSymbolTypeLineEntry; |
| break; |
| |
| // Left and Right Braces |
| case N_LBRAC: |
| // left bracket: 0,,NO_SECT,nesting level,address We |
| // use the current number of symbols in the symbol |
| // table in lieu of using nlist_idx in case we ever |
| // start trimming entries out |
| symbol_section = section_info.GetSection(nlist.n_sect, |
| nlist.n_value); |
| N_BRAC_indexes.push_back(sym_idx); |
| type = eSymbolTypeScopeBegin; |
| break; |
| |
| case N_RBRAC: |
| // right bracket: 0,,NO_SECT,nesting level,address |
| // Set the size of the N_LBRAC to the terminating |
| // index of this N_RBRAC so that we can always skip |
| // the entire symbol if we need to navigate more |
| // quickly at the source level when parsing STABS |
| symbol_section = section_info.GetSection(nlist.n_sect, |
| nlist.n_value); |
| if (!N_BRAC_indexes.empty()) { |
| symbol_ptr = |
| symtab.SymbolAtIndex(N_BRAC_indexes.back()); |
| symbol_ptr->SetByteSize(sym_idx + 1); |
| symbol_ptr->SetSizeIsSibling(true); |
| N_BRAC_indexes.pop_back(); |
| } |
| type = eSymbolTypeScopeEnd; |
| break; |
| |
| case N_EXCL: |
| // deleted include file: name,,NO_SECT,0,sum |
| type = eSymbolTypeHeaderFile; |
| break; |
| |
| // COMM scopes |
| case N_BCOMM: |
| // begin common: name,,NO_SECT,0,0 |
| // We use the current number of symbols in the symbol |
| // table in lieu of using nlist_idx in case we ever |
| // start trimming entries out |
| type = eSymbolTypeScopeBegin; |
| N_COMM_indexes.push_back(sym_idx); |
| break; |
| |
| case N_ECOML: |
| // end common (local name): 0,,n_sect,0,address |
| symbol_section = section_info.GetSection(nlist.n_sect, |
| nlist.n_value); |
| // Fall through |
| |
| case N_ECOMM: |
| // end common: name,,n_sect,0,0 |
| // Set the size of the N_BCOMM to the terminating |
| // index of this N_ECOMM/N_ECOML so that we can |
| // always skip the entire symbol if we need to |
| // navigate more quickly at the source level when |
| // parsing STABS |
| if (!N_COMM_indexes.empty()) { |
| symbol_ptr = |
| symtab.SymbolAtIndex(N_COMM_indexes.back()); |
| symbol_ptr->SetByteSize(sym_idx + 1); |
| symbol_ptr->SetSizeIsSibling(true); |
| N_COMM_indexes.pop_back(); |
| } |
| type = eSymbolTypeScopeEnd; |
| break; |
| |
| case N_LENG: |
| // second stab entry with length information |
| type = eSymbolTypeAdditional; |
| break; |
| |
| default: |
| break; |
| } |
| } else { |
| // uint8_t n_pext = N_PEXT & nlist.n_type; |
| uint8_t n_type = N_TYPE & nlist.n_type; |
| sym[sym_idx].SetExternal((N_EXT & nlist.n_type) != 0); |
| |
| switch (n_type) { |
| case N_INDR: { |
| const char *reexport_name_cstr = |
| strtab_data.PeekCStr(nlist.n_value); |
| if (reexport_name_cstr && reexport_name_cstr[0]) { |
| type = eSymbolTypeReExported; |
| ConstString reexport_name( |
| reexport_name_cstr + |
| ((reexport_name_cstr[0] == '_') ? 1 : 0)); |
| sym[sym_idx].SetReExportedSymbolName(reexport_name); |
| set_value = false; |
| reexport_shlib_needs_fixup[sym_idx] = reexport_name; |
| indirect_symbol_names.insert(ConstString( |
| symbol_name + ((symbol_name[0] == '_') ? 1 : 0))); |
| } else |
| type = eSymbolTypeUndefined; |
| } break; |
| |
| case N_UNDF: |
| if (symbol_name && symbol_name[0]) { |
| ConstString undefined_name( |
| symbol_name + ((symbol_name[0] == '_') ? 1 : 0)); |
| undefined_name_to_desc[undefined_name] = nlist.n_desc; |
| } |
| // Fall through |
| case N_PBUD: |
| type = eSymbolTypeUndefined; |
| break; |
| |
| case N_ABS: |
| type = eSymbolTypeAbsolute; |
| break; |
| |
| case N_SECT: { |
| symbol_section = section_info.GetSection(nlist.n_sect, |
| nlist.n_value); |
| |
| if (symbol_section == NULL) { |
| // TODO: warn about this? |
| add_nlist = false; |
| break; |
| } |
| |
| if (TEXT_eh_frame_sectID == nlist.n_sect) { |
| type = eSymbolTypeException; |
| } else { |
| uint32_t section_type = |
| symbol_section->Get() & SECTION_TYPE; |
| |
| switch (section_type) { |
| case S_CSTRING_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only literal C strings |
| case S_4BYTE_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only 4 byte literals |
| case S_8BYTE_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only 8 byte literals |
| case S_LITERAL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only pointers to literals |
| case S_NON_LAZY_SYMBOL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only non-lazy symbol |
| // pointers |
| case S_LAZY_SYMBOL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only lazy symbol pointers |
| case S_SYMBOL_STUBS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only symbol stubs, byte |
| // size of stub in the reserved2 field |
| case S_MOD_INIT_FUNC_POINTERS: |
| type = eSymbolTypeCode; |
| break; // section with only function pointers for |
| // initialization |
| case S_MOD_TERM_FUNC_POINTERS: |
| type = eSymbolTypeCode; |
| break; // section with only function pointers for |
| // termination |
| case S_INTERPOSING: |
| type = eSymbolTypeTrampoline; |
| break; // section with only pairs of function |
| // pointers for interposing |
| case S_16BYTE_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only 16 byte literals |
| case S_DTRACE_DOF: |
| type = eSymbolTypeInstrumentation; |
| break; |
| case S_LAZY_DYLIB_SYMBOL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; |
| default: |
| switch (symbol_section->GetType()) { |
| case lldb::eSectionTypeCode: |
| type = eSymbolTypeCode; |
| break; |
| case eSectionTypeData: |
| case eSectionTypeDataCString: // Inlined C string |
| // data |
| case eSectionTypeDataCStringPointers: // Pointers |
| // to C |
| // string |
| // data |
| case eSectionTypeDataSymbolAddress: // Address of |
| // a symbol in |
| // the symbol |
| // table |
| case eSectionTypeData4: |
| case eSectionTypeData8: |
| case eSectionTypeData16: |
| type = eSymbolTypeData; |
| break; |
| default: |
| break; |
| } |
| break; |
| } |
| |
| if (type == eSymbolTypeInvalid) { |
| const char *symbol_sect_name = |
| symbol_section->GetName().AsCString(); |
| if (symbol_section->IsDescendant( |
| text_section_sp.get())) { |
| if (symbol_section->IsClear( |
| S_ATTR_PURE_INSTRUCTIONS | |
| S_ATTR_SELF_MODIFYING_CODE | |
| S_ATTR_SOME_INSTRUCTIONS)) |
| type = eSymbolTypeData; |
| else |
| type = eSymbolTypeCode; |
| } else if (symbol_section->IsDescendant( |
| data_section_sp.get()) || |
| symbol_section->IsDescendant( |
| data_dirty_section_sp.get()) || |
| symbol_section->IsDescendant( |
| data_const_section_sp.get())) { |
| if (symbol_sect_name && |
| ::strstr(symbol_sect_name, "__objc") == |
| symbol_sect_name) { |
| type = eSymbolTypeRuntime; |
| |
| if (symbol_name) { |
| llvm::StringRef symbol_name_ref(symbol_name); |
| if (symbol_name_ref.startswith("_OBJC_")) { |
| llvm::StringRef |
| g_objc_v2_prefix_class( |
| "_OBJC_CLASS_$_"); |
| llvm::StringRef |
| g_objc_v2_prefix_metaclass( |
| "_OBJC_METACLASS_$_"); |
| llvm::StringRef |
| g_objc_v2_prefix_ivar("_OBJC_IVAR_$_"); |
| if (symbol_name_ref.startswith( |
| g_objc_v2_prefix_class)) { |
| symbol_name_non_abi_mangled = |
| symbol_name + 1; |
| symbol_name = |
| symbol_name + |
| g_objc_v2_prefix_class.size(); |
| type = eSymbolTypeObjCClass; |
| demangled_is_synthesized = true; |
| } else if ( |
| symbol_name_ref.startswith( |
| g_objc_v2_prefix_metaclass)) { |
| symbol_name_non_abi_mangled = |
| symbol_name + 1; |
| symbol_name = |
| symbol_name + |
| g_objc_v2_prefix_metaclass.size(); |
| type = eSymbolTypeObjCMetaClass; |
| demangled_is_synthesized = true; |
| } else if (symbol_name_ref.startswith( |
| g_objc_v2_prefix_ivar)) { |
| symbol_name_non_abi_mangled = |
| symbol_name + 1; |
| symbol_name = |
| symbol_name + |
| g_objc_v2_prefix_ivar.size(); |
| type = eSymbolTypeObjCIVar; |
| demangled_is_synthesized = true; |
| } |
| } |
| } |
| } else if (symbol_sect_name && |
| ::strstr(symbol_sect_name, |
| "__gcc_except_tab") == |
| symbol_sect_name) { |
| type = eSymbolTypeException; |
| } else { |
| type = eSymbolTypeData; |
| } |
| } else if (symbol_sect_name && |
| ::strstr(symbol_sect_name, "__IMPORT") == |
| symbol_sect_name) { |
| type = eSymbolTypeTrampoline; |
| } else if (symbol_section->IsDescendant( |
| objc_section_sp.get())) { |
| type = eSymbolTypeRuntime; |
| if (symbol_name && symbol_name[0] == '.') { |
| llvm::StringRef symbol_name_ref(symbol_name); |
| llvm::StringRef |
| g_objc_v1_prefix_class(".objc_class_name_"); |
| if (symbol_name_ref.startswith( |
| g_objc_v1_prefix_class)) { |
| symbol_name_non_abi_mangled = symbol_name; |
| symbol_name = symbol_name + |
| g_objc_v1_prefix_class.size(); |
| type = eSymbolTypeObjCClass; |
| demangled_is_synthesized = true; |
| } |
| } |
| } |
| } |
| } |
| } break; |
| } |
| } |
| |
| if (add_nlist) { |
| uint64_t symbol_value = nlist.n_value; |
| if (symbol_name_non_abi_mangled) { |
| sym[sym_idx].GetMangled().SetMangledName( |
| ConstString(symbol_name_non_abi_mangled)); |
| sym[sym_idx].GetMangled().SetDemangledName( |
| ConstString(symbol_name)); |
| } else { |
| bool symbol_name_is_mangled = false; |
| |
| if (symbol_name && symbol_name[0] == '_') { |
| symbol_name_is_mangled = symbol_name[1] == '_'; |
| symbol_name++; // Skip the leading underscore |
| } |
| |
| if (symbol_name) { |
| ConstString const_symbol_name(symbol_name); |
| sym[sym_idx].GetMangled().SetValue( |
| const_symbol_name, symbol_name_is_mangled); |
| if (is_gsym && is_debug) { |
| const char *gsym_name = |
| sym[sym_idx] |
| .GetMangled() |
| .GetName(Mangled::ePreferMangled) |
| .GetCString(); |
| if (gsym_name) |
| N_GSYM_name_to_sym_idx[gsym_name] = sym_idx; |
| } |
| } |
| } |
| if (symbol_section) { |
| const addr_t section_file_addr = |
| symbol_section->GetFileAddress(); |
| if (symbol_byte_size == 0 && |
| function_starts_count > 0) { |
| addr_t symbol_lookup_file_addr = nlist.n_value; |
| // Do an exact address match for non-ARM addresses, |
| // else get the closest since the symbol might be a |
| // thumb symbol which has an address with bit zero |
| // set |
| FunctionStarts::Entry *func_start_entry = |
| function_starts.FindEntry(symbol_lookup_file_addr, |
| !is_arm); |
| if (is_arm && func_start_entry) { |
| // Verify that the function start address is the |
| // symbol address (ARM) or the symbol address + 1 |
| // (thumb) |
| if (func_start_entry->addr != |
| symbol_lookup_file_addr && |
| func_start_entry->addr != |
| (symbol_lookup_file_addr + 1)) { |
| // Not the right entry, NULL it out... |
| func_start_entry = NULL; |
| } |
| } |
| if (func_start_entry) { |
| func_start_entry->data = true; |
| |
| addr_t symbol_file_addr = func_start_entry->addr; |
| uint32_t symbol_flags = 0; |
| if (is_arm) { |
| if (symbol_file_addr & 1) |
| symbol_flags = MACHO_NLIST_ARM_SYMBOL_IS_THUMB; |
| symbol_file_addr &= THUMB_ADDRESS_BIT_MASK; |
| } |
| |
| const FunctionStarts::Entry *next_func_start_entry = |
| function_starts.FindNextEntry(func_start_entry); |
| const addr_t section_end_file_addr = |
| section_file_addr + |
| symbol_section->GetByteSize(); |
| if (next_func_start_entry) { |
| addr_t next_symbol_file_addr = |
| next_func_start_entry->addr; |
| // Be sure the clear the Thumb address bit when |
| // we calculate the size from the current and |
| // next address |
| if (is_arm) |
| next_symbol_file_addr &= THUMB_ADDRESS_BIT_MASK; |
| symbol_byte_size = std::min<lldb::addr_t>( |
| next_symbol_file_addr - symbol_file_addr, |
| section_end_file_addr - symbol_file_addr); |
| } else { |
| symbol_byte_size = |
| section_end_file_addr - symbol_file_addr; |
| } |
| } |
| } |
| symbol_value -= section_file_addr; |
| } |
| |
| if (is_debug == false) { |
| if (type == eSymbolTypeCode) { |
| // See if we can find a N_FUN entry for any code |
| // symbols. If we do find a match, and the name |
| // matches, then we can merge the two into just the |
| // function symbol to avoid duplicate entries in |
| // the symbol table |
| auto range = |
| N_FUN_addr_to_sym_idx.equal_range(nlist.n_value); |
| if (range.first != range.second) { |
| bool found_it = false; |
| for (auto pos = range.first; pos != range.second; |
| ++pos) { |
| if (sym[sym_idx].GetMangled().GetName( |
| Mangled::ePreferMangled) == |
| sym[pos->second].GetMangled().GetName( |
| Mangled::ePreferMangled)) { |
| m_nlist_idx_to_sym_idx[nlist_idx] = pos->second; |
| // We just need the flags from the linker |
| // symbol, so put these flags |
| // into the N_FUN flags to avoid duplicate |
| // symbols in the symbol table |
| sym[pos->second].SetExternal( |
| sym[sym_idx].IsExternal()); |
| sym[pos->second].SetFlags(nlist.n_type << 16 | |
| nlist.n_desc); |
| if (resolver_addresses.find(nlist.n_value) != |
| resolver_addresses.end()) |
| sym[pos->second].SetType(eSymbolTypeResolver); |
| sym[sym_idx].Clear(); |
| found_it = true; |
| break; |
| } |
| } |
| if (found_it) |
| continue; |
| } else { |
| if (resolver_addresses.find(nlist.n_value) != |
| resolver_addresses.end()) |
| type = eSymbolTypeResolver; |
| } |
| } else if (type == eSymbolTypeData || |
| type == eSymbolTypeObjCClass || |
| type == eSymbolTypeObjCMetaClass || |
| type == eSymbolTypeObjCIVar) { |
| // See if we can find a N_STSYM entry for any data |
| // symbols. If we do find a match, and the name |
| // matches, then we can merge the two into just the |
| // Static symbol to avoid duplicate entries in the |
| // symbol table |
| auto range = N_STSYM_addr_to_sym_idx.equal_range( |
| nlist.n_value); |
| if (range.first != range.second) { |
| bool found_it = false; |
| for (auto pos = range.first; pos != range.second; |
| ++pos) { |
| if (sym[sym_idx].GetMangled().GetName( |
| Mangled::ePreferMangled) == |
| sym[pos->second].GetMangled().GetName( |
| Mangled::ePreferMangled)) { |
| m_nlist_idx_to_sym_idx[nlist_idx] = pos->second; |
| // We just need the flags from the linker |
| // symbol, so put these flags |
| // into the N_STSYM flags to avoid duplicate |
| // symbols in the symbol table |
| sym[pos->second].SetExternal( |
| sym[sym_idx].IsExternal()); |
| sym[pos->second].SetFlags(nlist.n_type << 16 | |
| nlist.n_desc); |
| sym[sym_idx].Clear(); |
| found_it = true; |
| break; |
| } |
| } |
| if (found_it) |
| continue; |
| } else { |
| const char *gsym_name = |
| sym[sym_idx] |
| .GetMangled() |
| .GetName(Mangled::ePreferMangled) |
| .GetCString(); |
| if (gsym_name) { |
| // Combine N_GSYM stab entries with the non |
| // stab symbol |
| ConstNameToSymbolIndexMap::const_iterator pos = |
| N_GSYM_name_to_sym_idx.find(gsym_name); |
| if (pos != N_GSYM_name_to_sym_idx.end()) { |
| const uint32_t GSYM_sym_idx = pos->second; |
| m_nlist_idx_to_sym_idx[nlist_idx] = |
| GSYM_sym_idx; |
| // Copy the address, because often the N_GSYM |
| // address has an invalid address of zero |
| // when the global is a common symbol |
| sym[GSYM_sym_idx].GetAddressRef().SetSection( |
| symbol_section); |
| sym[GSYM_sym_idx].GetAddressRef().SetOffset( |
| symbol_value); |
| add_symbol_addr(sym[GSYM_sym_idx] |
| .GetAddress() |
| .GetFileAddress()); |
| // We just need the flags from the linker |
| // symbol, so put these flags |
| // into the N_GSYM flags to avoid duplicate |
| // symbols in the symbol table |
| sym[GSYM_sym_idx].SetFlags(nlist.n_type << 16 | |
| nlist.n_desc); |
| sym[sym_idx].Clear(); |
| continue; |
| } |
| } |
| } |
| } |
| } |
| |
| sym[sym_idx].SetID(nlist_idx); |
| sym[sym_idx].SetType(type); |
| if (set_value) { |
| sym[sym_idx].GetAddressRef().SetSection(symbol_section); |
| sym[sym_idx].GetAddressRef().SetOffset(symbol_value); |
| add_symbol_addr( |
| sym[sym_idx].GetAddress().GetFileAddress()); |
| } |
| sym[sym_idx].SetFlags(nlist.n_type << 16 | nlist.n_desc); |
| |
| if (symbol_byte_size > 0) |
| sym[sym_idx].SetByteSize(symbol_byte_size); |
| |
| if (demangled_is_synthesized) |
| sym[sym_idx].SetDemangledNameIsSynthesized(true); |
| ++sym_idx; |
| } else { |
| sym[sym_idx].Clear(); |
| } |
| } |
| ///////////////////////////// |
| } |
| } |
| |
| for (const auto &pos : reexport_shlib_needs_fixup) { |
| const auto undef_pos = undefined_name_to_desc.find(pos.second); |
| if (undef_pos != undefined_name_to_desc.end()) { |
| const uint8_t dylib_ordinal = |
| llvm::MachO::GET_LIBRARY_ORDINAL(undef_pos->second); |
| if (dylib_ordinal > 0 && dylib_ordinal < dylib_files.GetSize()) |
| sym[pos.first].SetReExportedSymbolSharedLibrary( |
| dylib_files.GetFileSpecAtIndex(dylib_ordinal - 1)); |
| } |
| } |
| } |
| |
| #endif |
| lldb::offset_t nlist_data_offset = 0; |
| |
| if (nlist_data.GetByteSize() > 0) { |
| |
| // If the sym array was not created while parsing the DSC unmapped |
| // symbols, create it now. |
| if (sym == nullptr) { |
| sym = |
| symtab.Resize(symtab_load_command.nsyms + m_dysymtab.nindirectsyms); |
| num_syms = symtab.GetNumSymbols(); |
| } |
| |
| if (unmapped_local_symbols_found) { |
| assert(m_dysymtab.ilocalsym == 0); |
| nlist_data_offset += (m_dysymtab.nlocalsym * nlist_byte_size); |
| nlist_idx = m_dysymtab.nlocalsym; |
| } else { |
| nlist_idx = 0; |
| } |
| |
| typedef llvm::DenseMap<ConstString, uint16_t> UndefinedNameToDescMap; |
| typedef llvm::DenseMap<uint32_t, ConstString> SymbolIndexToName; |
| UndefinedNameToDescMap undefined_name_to_desc; |
| SymbolIndexToName reexport_shlib_needs_fixup; |
| |
| // Symtab parsing is a huge mess. Everything is entangled and the code |
| // requires access to a ridiculous amount of variables. LLDB depends |
| // heavily on the proper merging of symbols and to get that right we need |
| // to make sure we have parsed all the debug symbols first. Therefore we |
| // invoke the lambda twice, once to parse only the debug symbols and then |
| // once more to parse the remaining symbols. |
| auto ParseSymbolLambda = [&](struct nlist_64 &nlist, uint32_t nlist_idx, |
| bool debug_only) { |
| const bool is_debug = ((nlist.n_type & N_STAB) != 0); |
| if (is_debug != debug_only) |
| return true; |
| |
| const char *symbol_name_non_abi_mangled = nullptr; |
| const char *symbol_name = nullptr; |
| |
| if (have_strtab_data) { |
| symbol_name = strtab_data.PeekCStr(nlist.n_strx); |
| |
| if (symbol_name == nullptr) { |
| // No symbol should be NULL, even the symbols with no string values |
| // should have an offset zero which points to an empty C-string |
| Debugger::ReportError(llvm::formatv( |
| "symbol[{0}] has invalid string table offset {1:x} in {2}, " |
| "ignoring symbol", |
| nlist_idx, nlist.n_strx, module_sp->GetFileSpec().GetPath())); |
| return true; |
| } |
| if (symbol_name[0] == '\0') |
| symbol_name = nullptr; |
| } else { |
| const addr_t str_addr = strtab_addr + nlist.n_strx; |
| Status str_error; |
| if (process->ReadCStringFromMemory(str_addr, memory_symbol_name, |
| str_error)) |
| symbol_name = memory_symbol_name.c_str(); |
| } |
| |
| SymbolType type = eSymbolTypeInvalid; |
| SectionSP symbol_section; |
| lldb::addr_t symbol_byte_size = 0; |
| bool add_nlist = true; |
| bool is_gsym = false; |
| bool demangled_is_synthesized = false; |
| bool set_value = true; |
| |
| assert(sym_idx < num_syms); |
| sym[sym_idx].SetDebug(is_debug); |
| |
| if (is_debug) { |
| switch (nlist.n_type) { |
| case N_GSYM: |
| // global symbol: name,,NO_SECT,type,0 |
| // Sometimes the N_GSYM value contains the address. |
| |
| // FIXME: In the .o files, we have a GSYM and a debug symbol for all |
| // the ObjC data. They |
| // have the same address, but we want to ensure that we always find |
| // only the real symbol, 'cause we don't currently correctly |
| // attribute the GSYM one to the ObjCClass/Ivar/MetaClass symbol |
| // type. This is a temporary hack to make sure the ObjectiveC |
| // symbols get treated correctly. To do this right, we should |
| // coalesce all the GSYM & global symbols that have the same |
| // address. |
| is_gsym = true; |
| sym[sym_idx].SetExternal(true); |
| |
| if (symbol_name && symbol_name[0] == '_' && symbol_name[1] == 'O') { |
| llvm::StringRef symbol_name_ref(symbol_name); |
| if (symbol_name_ref.startswith(g_objc_v2_prefix_class)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = symbol_name + g_objc_v2_prefix_class.size(); |
| type = eSymbolTypeObjCClass; |
| demangled_is_synthesized = true; |
| |
| } else if (symbol_name_ref.startswith(g_objc_v2_prefix_metaclass)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = symbol_name + g_objc_v2_prefix_metaclass.size(); |
| type = eSymbolTypeObjCMetaClass; |
| demangled_is_synthesized = true; |
| } else if (symbol_name_ref.startswith(g_objc_v2_prefix_ivar)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = symbol_name + g_objc_v2_prefix_ivar.size(); |
| type = eSymbolTypeObjCIVar; |
| demangled_is_synthesized = true; |
| } |
| } else { |
| if (nlist.n_value != 0) |
| symbol_section = |
| section_info.GetSection(nlist.n_sect, nlist.n_value); |
| type = eSymbolTypeData; |
| } |
| break; |
| |
| case N_FNAME: |
| // procedure name (f77 kludge): name,,NO_SECT,0,0 |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_FUN: |
| // procedure: name,,n_sect,linenumber,address |
| if (symbol_name) { |
| type = eSymbolTypeCode; |
| symbol_section = |
| section_info.GetSection(nlist.n_sect, nlist.n_value); |
| |
| N_FUN_addr_to_sym_idx.insert( |
| std::make_pair(nlist.n_value, sym_idx)); |
| // We use the current number of symbols in the symbol table in |
| // lieu of using nlist_idx in case we ever start trimming entries |
| // out |
| N_FUN_indexes.push_back(sym_idx); |
| } else { |
| type = eSymbolTypeCompiler; |
| |
| if (!N_FUN_indexes.empty()) { |
| // Copy the size of the function into the original STAB entry |
| // so we don't have to hunt for it later |
| symtab.SymbolAtIndex(N_FUN_indexes.back()) |
| ->SetByteSize(nlist.n_value); |
| N_FUN_indexes.pop_back(); |
| // We don't really need the end function STAB as it contains |
| // the size which we already placed with the original symbol, |
| // so don't add it if we want a minimal symbol table |
| add_nlist = false; |
| } |
| } |
| break; |
| |
| case N_STSYM: |
| // static symbol: name,,n_sect,type,address |
| N_STSYM_addr_to_sym_idx.insert( |
| std::make_pair(nlist.n_value, sym_idx)); |
| symbol_section = section_info.GetSection(nlist.n_sect, nlist.n_value); |
| if (symbol_name && symbol_name[0]) { |
| type = ObjectFile::GetSymbolTypeFromName(symbol_name + 1, |
| eSymbolTypeData); |
| } |
| break; |
| |
| case N_LCSYM: |
| // .lcomm symbol: name,,n_sect,type,address |
| symbol_section = section_info.GetSection(nlist.n_sect, nlist.n_value); |
| type = eSymbolTypeCommonBlock; |
| break; |
| |
| case N_BNSYM: |
| // We use the current number of symbols in the symbol table in lieu |
| // of using nlist_idx in case we ever start trimming entries out |
| // Skip these if we want minimal symbol tables |
| add_nlist = false; |
| break; |
| |
| case N_ENSYM: |
| // Set the size of the N_BNSYM to the terminating index of this |
| // N_ENSYM so that we can always skip the entire symbol if we need |
| // to navigate more quickly at the source level when parsing STABS |
| // Skip these if we want minimal symbol tables |
| add_nlist = false; |
| break; |
| |
| case N_OPT: |
| // emitted with gcc2_compiled and in gcc source |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_RSYM: |
| // register sym: name,,NO_SECT,type,register |
| type = eSymbolTypeVariable; |
| break; |
| |
| case N_SLINE: |
| // src line: 0,,n_sect,linenumber,address |
| symbol_section = section_info.GetSection(nlist.n_sect, nlist.n_value); |
| type = eSymbolTypeLineEntry; |
| break; |
| |
| case N_SSYM: |
| // structure elt: name,,NO_SECT,type,struct_offset |
| type = eSymbolTypeVariableType; |
| break; |
| |
| case N_SO: |
| // source file name |
| type = eSymbolTypeSourceFile; |
| if (symbol_name == nullptr) { |
| add_nlist = false; |
| if (N_SO_index != UINT32_MAX) { |
| // Set the size of the N_SO to the terminating index of this |
| // N_SO so that we can always skip the entire N_SO if we need |
| // to navigate more quickly at the source level when parsing |
| // STABS |
| symbol_ptr = symtab.SymbolAtIndex(N_SO_index); |
| symbol_ptr->SetByteSize(sym_idx); |
| symbol_ptr->SetSizeIsSibling(true); |
| } |
| N_NSYM_indexes.clear(); |
| N_INCL_indexes.clear(); |
| N_BRAC_indexes.clear(); |
| N_COMM_indexes.clear(); |
| N_FUN_indexes.clear(); |
| N_SO_index = UINT32_MAX; |
| } else { |
| // We use the current number of symbols in the symbol table in |
| // lieu of using nlist_idx in case we ever start trimming entries |
| // out |
| const bool N_SO_has_full_path = symbol_name[0] == '/'; |
| if (N_SO_has_full_path) { |
| if ((N_SO_index == sym_idx - 1) && ((sym_idx - 1) < num_syms)) { |
| // We have two consecutive N_SO entries where the first |
| // contains a directory and the second contains a full path. |
| sym[sym_idx - 1].GetMangled().SetValue(ConstString(symbol_name), |
| false); |
| m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1; |
| add_nlist = false; |
| } else { |
| // This is the first entry in a N_SO that contains a |
| // directory or a full path to the source file |
| N_SO_index = sym_idx; |
| } |
| } else if ((N_SO_index == sym_idx - 1) && |
| ((sym_idx - 1) < num_syms)) { |
| // This is usually the second N_SO entry that contains just the |
| // filename, so here we combine it with the first one if we are |
| // minimizing the symbol table |
| const char *so_path = |
| sym[sym_idx - 1].GetMangled().GetDemangledName().AsCString(); |
| if (so_path && so_path[0]) { |
| std::string full_so_path(so_path); |
| const size_t double_slash_pos = full_so_path.find("//"); |
| if (double_slash_pos != std::string::npos) { |
| // The linker has been generating bad N_SO entries with |
| // doubled up paths in the format "%s%s" where the first |
| // string in the DW_AT_comp_dir, and the second is the |
| // directory for the source file so you end up with a path |
| // that looks like "/tmp/src//tmp/src/" |
| FileSpec so_dir(so_path); |
| if (!FileSystem::Instance().Exists(so_dir)) { |
| so_dir.SetFile(&full_so_path[double_slash_pos + 1], |
| FileSpec::Style::native); |
| if (FileSystem::Instance().Exists(so_dir)) { |
| // Trim off the incorrect path |
| full_so_path.erase(0, double_slash_pos + 1); |
| } |
| } |
| } |
| if (*full_so_path.rbegin() != '/') |
| full_so_path += '/'; |
| full_so_path += symbol_name; |
| sym[sym_idx - 1].GetMangled().SetValue( |
| ConstString(full_so_path.c_str()), false); |
| add_nlist = false; |
| m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1; |
| } |
| } else { |
| // This could be a relative path to a N_SO |
| N_SO_index = sym_idx; |
| } |
| } |
| break; |
| |
| case N_OSO: |
| // object file name: name,,0,0,st_mtime |
| type = eSymbolTypeObjectFile; |
| break; |
| |
| case N_LSYM: |
| // local sym: name,,NO_SECT,type,offset |
| type = eSymbolTypeLocal; |
| break; |
| |
| // INCL scopes |
| case N_BINCL: |
| // include file beginning: name,,NO_SECT,0,sum We use the current |
| // number of symbols in the symbol table in lieu of using nlist_idx |
| // in case we ever start trimming entries out |
| N_INCL_indexes.push_back(sym_idx); |
| type = eSymbolTypeScopeBegin; |
| break; |
| |
| case N_EINCL: |
| // include file end: name,,NO_SECT,0,0 |
| // Set the size of the N_BINCL to the terminating index of this |
| // N_EINCL so that we can always skip the entire symbol if we need |
| // to navigate more quickly at the source level when parsing STABS |
| if (!N_INCL_indexes.empty()) { |
| symbol_ptr = symtab.SymbolAtIndex(N_INCL_indexes.back()); |
| symbol_ptr->SetByteSize(sym_idx + 1); |
| symbol_ptr->SetSizeIsSibling(true); |
| N_INCL_indexes.pop_back(); |
| } |
| type = eSymbolTypeScopeEnd; |
| break; |
| |
| case N_SOL: |
| // #included file name: name,,n_sect,0,address |
| type = eSymbolTypeHeaderFile; |
| |
| // We currently don't use the header files on darwin |
| add_nlist = false; |
| break; |
| |
| case N_PARAMS: |
| // compiler parameters: name,,NO_SECT,0,0 |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_VERSION: |
| // compiler version: name,,NO_SECT,0,0 |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_OLEVEL: |
| // compiler -O level: name,,NO_SECT,0,0 |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_PSYM: |
| // parameter: name,,NO_SECT,type,offset |
| type = eSymbolTypeVariable; |
| break; |
| |
| case N_ENTRY: |
| // alternate entry: name,,n_sect,linenumber,address |
| symbol_section = section_info.GetSection(nlist.n_sect, nlist.n_value); |
| type = eSymbolTypeLineEntry; |
| break; |
| |
| // Left and Right Braces |
| case N_LBRAC: |
| // left bracket: 0,,NO_SECT,nesting level,address We use the |
| // current number of symbols in the symbol table in lieu of using |
| // nlist_idx in case we ever start trimming entries out |
| symbol_section = section_info.GetSection(nlist.n_sect, nlist.n_value); |
| N_BRAC_indexes.push_back(sym_idx); |
| type = eSymbolTypeScopeBegin; |
| break; |
| |
| case N_RBRAC: |
| // right bracket: 0,,NO_SECT,nesting level,address Set the size of |
| // the N_LBRAC to the terminating index of this N_RBRAC so that we |
| // can always skip the entire symbol if we need to navigate more |
| // quickly at the source level when parsing STABS |
| symbol_section = section_info.GetSection(nlist.n_sect, nlist.n_value); |
| if (!N_BRAC_indexes.empty()) { |
| symbol_ptr = symtab.SymbolAtIndex(N_BRAC_indexes.back()); |
| symbol_ptr->SetByteSize(sym_idx + 1); |
| symbol_ptr->SetSizeIsSibling(true); |
| N_BRAC_indexes.pop_back(); |
| } |
| type = eSymbolTypeScopeEnd; |
| break; |
| |
| case N_EXCL: |
| // deleted include file: name,,NO_SECT,0,sum |
| type = eSymbolTypeHeaderFile; |
| break; |
| |
| // COMM scopes |
| case N_BCOMM: |
| // begin common: name,,NO_SECT,0,0 |
| // We use the current number of symbols in the symbol table in lieu |
| // of using nlist_idx in case we ever start trimming entries out |
| type = eSymbolTypeScopeBegin; |
| N_COMM_indexes.push_back(sym_idx); |
| break; |
| |
| case N_ECOML: |
| // end common (local name): 0,,n_sect,0,address |
| symbol_section = section_info.GetSection(nlist.n_sect, nlist.n_value); |
| LLVM_FALLTHROUGH; |
| |
| case N_ECOMM: |
| // end common: name,,n_sect,0,0 |
| // Set the size of the N_BCOMM to the terminating index of this |
| // N_ECOMM/N_ECOML so that we can always skip the entire symbol if |
| // we need to navigate more quickly at the source level when |
| // parsing STABS |
| if (!N_COMM_indexes.empty()) { |
| symbol_ptr = symtab.SymbolAtIndex(N_COMM_indexes.back()); |
| symbol_ptr->SetByteSize(sym_idx + 1); |
| symbol_ptr->SetSizeIsSibling(true); |
| N_COMM_indexes.pop_back(); |
| } |
| type = eSymbolTypeScopeEnd; |
| break; |
| |
| case N_LENG: |
| // second stab entry with length information |
| type = eSymbolTypeAdditional; |
| break; |
| |
| default: |
| break; |
| } |
| } else { |
| uint8_t n_type = N_TYPE & nlist.n_type; |
| sym[sym_idx].SetExternal((N_EXT & nlist.n_type) != 0); |
| |
| switch (n_type) { |
| case N_INDR: { |
| const char *reexport_name_cstr = strtab_data.PeekCStr(nlist.n_value); |
| if (reexport_name_cstr && reexport_name_cstr[0]) { |
| type = eSymbolTypeReExported; |
| ConstString reexport_name(reexport_name_cstr + |
| ((reexport_name_cstr[0] == '_') ? 1 : 0)); |
| sym[sym_idx].SetReExportedSymbolName(reexport_name); |
| set_value = false; |
| reexport_shlib_needs_fixup[sym_idx] = reexport_name; |
| indirect_symbol_names.insert( |
| ConstString(symbol_name + ((symbol_name[0] == '_') ? 1 : 0))); |
| } else |
| type = eSymbolTypeUndefined; |
| } break; |
| |
| case N_UNDF: |
| if (symbol_name && symbol_name[0]) { |
| ConstString undefined_name(symbol_name + |
| ((symbol_name[0] == '_') ? 1 : 0)); |
| undefined_name_to_desc[undefined_name] = nlist.n_desc; |
| } |
| LLVM_FALLTHROUGH; |
| |
| case N_PBUD: |
| type = eSymbolTypeUndefined; |
| break; |
| |
| case N_ABS: |
| type = eSymbolTypeAbsolute; |
| break; |
| |
| case N_SECT: { |
| symbol_section = section_info.GetSection(nlist.n_sect, nlist.n_value); |
| |
| if (!symbol_section) { |
| // TODO: warn about this? |
| add_nlist = false; |
| break; |
| } |
| |
| if (TEXT_eh_frame_sectID == nlist.n_sect) { |
| type = eSymbolTypeException; |
| } else { |
| uint32_t section_type = symbol_section->Get() & SECTION_TYPE; |
| |
| switch (section_type) { |
| case S_CSTRING_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only literal C strings |
| case S_4BYTE_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only 4 byte literals |
| case S_8BYTE_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only 8 byte literals |
| case S_LITERAL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only pointers to literals |
| case S_NON_LAZY_SYMBOL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only non-lazy symbol pointers |
| case S_LAZY_SYMBOL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only lazy symbol pointers |
| case S_SYMBOL_STUBS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only symbol stubs, byte size of stub in |
| // the reserved2 field |
| case S_MOD_INIT_FUNC_POINTERS: |
| type = eSymbolTypeCode; |
| break; // section with only function pointers for initialization |
| case S_MOD_TERM_FUNC_POINTERS: |
| type = eSymbolTypeCode; |
| break; // section with only function pointers for termination |
| case S_INTERPOSING: |
| type = eSymbolTypeTrampoline; |
| break; // section with only pairs of function pointers for |
| // interposing |
| case S_16BYTE_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only 16 byte literals |
| case S_DTRACE_DOF: |
| type = eSymbolTypeInstrumentation; |
| break; |
| case S_LAZY_DYLIB_SYMBOL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; |
| default: |
| switch (symbol_section->GetType()) { |
| case lldb::eSectionTypeCode: |
| type = eSymbolTypeCode; |
| break; |
| case eSectionTypeData: |
| case eSectionTypeDataCString: // Inlined C string data |
| case eSectionTypeDataCStringPointers: // Pointers to C string |
| // data |
| case eSectionTypeDataSymbolAddress: // Address of a symbol in |
| // the symbol table |
| case eSectionTypeData4: |
| case eSectionTypeData8: |
| case eSectionTypeData16: |
| type = eSymbolTypeData; |
| break; |
| default: |
| break; |
| } |
| break; |
| } |
| |
| if (type == eSymbolTypeInvalid) { |
| const char *symbol_sect_name = |
| symbol_section->GetName().AsCString(); |
| if (symbol_section->IsDescendant(text_section_sp.get())) { |
| if (symbol_section->IsClear(S_ATTR_PURE_INSTRUCTIONS | |
| S_ATTR_SELF_MODIFYING_CODE | |
| S_ATTR_SOME_INSTRUCTIONS)) |
| type = eSymbolTypeData; |
| else |
| type = eSymbolTypeCode; |
| } else if (symbol_section->IsDescendant(data_section_sp.get()) || |
| symbol_section->IsDescendant( |
| data_dirty_section_sp.get()) || |
| symbol_section->IsDescendant( |
| data_const_section_sp.get())) { |
| if (symbol_sect_name && |
| ::strstr(symbol_sect_name, "__objc") == symbol_sect_name) { |
| type = eSymbolTypeRuntime; |
| |
| if (symbol_name) { |
| llvm::StringRef symbol_name_ref(symbol_name); |
| if (symbol_name_ref.startswith("_OBJC_")) { |
| llvm::StringRef g_objc_v2_prefix_class( |
| "_OBJC_CLASS_$_"); |
| llvm::StringRef g_objc_v2_prefix_metaclass( |
| "_OBJC_METACLASS_$_"); |
| llvm::StringRef g_objc_v2_prefix_ivar( |
| "_OBJC_IVAR_$_"); |
| if (symbol_name_ref.startswith(g_objc_v2_prefix_class)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = |
| symbol_name + g_objc_v2_prefix_class.size(); |
| type = eSymbolTypeObjCClass; |
| demangled_is_synthesized = true; |
| } else if (symbol_name_ref.startswith( |
| g_objc_v2_prefix_metaclass)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = |
| symbol_name + g_objc_v2_prefix_metaclass.size(); |
| type = eSymbolTypeObjCMetaClass; |
| demangled_is_synthesized = true; |
| } else if (symbol_name_ref.startswith( |
| g_objc_v2_prefix_ivar)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = |
| symbol_name + g_objc_v2_prefix_ivar.size(); |
| type = eSymbolTypeObjCIVar; |
| demangled_is_synthesized = true; |
| } |
| } |
| } |
| } else if (symbol_sect_name && |
| ::strstr(symbol_sect_name, "__gcc_except_tab") == |
| symbol_sect_name) { |
| type = eSymbolTypeException; |
| } else { |
| type = eSymbolTypeData; |
| } |
| } else if (symbol_sect_name && |
| ::strstr(symbol_sect_name, "__IMPORT") == |
| symbol_sect_name) { |
| type = eSymbolTypeTrampoline; |
| } else if (symbol_section->IsDescendant(objc_section_sp.get())) { |
| type = eSymbolTypeRuntime; |
| if (symbol_name && symbol_name[0] == '.') { |
| llvm::StringRef symbol_name_ref(symbol_name); |
| llvm::StringRef g_objc_v1_prefix_class( |
| ".objc_class_name_"); |
| if (symbol_name_ref.startswith(g_objc_v1_prefix_class)) { |
| symbol_name_non_abi_mangled = symbol_name; |
| symbol_name = symbol_name + g_objc_v1_prefix_class.size(); |
| type = eSymbolTypeObjCClass; |
| demangled_is_synthesized = true; |
| } |
| } |
| } |
| } |
| } |
| } break; |
| } |
| } |
| |
| if (!add_nlist) { |
| sym[sym_idx].Clear(); |
| return true; |
| } |
| |
| uint64_t symbol_value = nlist.n_value; |
| |
| if (symbol_name_non_abi_mangled) { |
| sym[sym_idx].GetMangled().SetMangledName( |
| ConstString(symbol_name_non_abi_mangled)); |
| sym[sym_idx].GetMangled().SetDemangledName(ConstString(symbol_name)); |
| } else { |
| bool symbol_name_is_mangled = false; |
| |
| if (symbol_name && symbol_name[0] == '_') { |
| symbol_name_is_mangled = symbol_name[1] == '_'; |
| symbol_name++; // Skip the leading underscore |
| } |
| |
| if (symbol_name) { |
| ConstString const_symbol_name(symbol_name); |
| sym[sym_idx].GetMangled().SetValue(const_symbol_name, |
| symbol_name_is_mangled); |
| } |
| } |
| |
| if (is_gsym) { |
| const char *gsym_name = sym[sym_idx] |
| .GetMangled() |
| .GetName(Mangled::ePreferMangled) |
| .GetCString(); |
| if (gsym_name) |
| N_GSYM_name_to_sym_idx[gsym_name] = sym_idx; |
| } |
| |
| if (symbol_section) { |
| const addr_t section_file_addr = symbol_section->GetFileAddress(); |
| if (symbol_byte_size == 0 && function_starts_count > 0) { |
| addr_t symbol_lookup_file_addr = nlist.n_value; |
| // Do an exact address match for non-ARM addresses, else get the |
| // closest since the symbol might be a thumb symbol which has an |
| // address with bit zero set. |
| FunctionStarts::Entry *func_start_entry = |
| function_starts.FindEntry(symbol_lookup_file_addr, !is_arm); |
| if (is_arm && func_start_entry) { |
| // Verify that the function start address is the symbol address |
| // (ARM) or the symbol address + 1 (thumb). |
| if (func_start_entry->addr != symbol_lookup_file_addr && |
| func_start_entry->addr != (symbol_lookup_file_addr + 1)) { |
| // Not the right entry, NULL it out... |
| func_start_entry = nullptr; |
| } |
| } |
| if (func_start_entry) { |
| func_start_entry->data = true; |
| |
| addr_t symbol_file_addr = func_start_entry->addr; |
| if (is_arm) |
| symbol_file_addr &= THUMB_ADDRESS_BIT_MASK; |
| |
| const FunctionStarts::Entry *next_func_start_entry = |
| function_starts.FindNextEntry(func_start_entry); |
| const addr_t section_end_file_addr = |
| section_file_addr + symbol_section->GetByteSize(); |
| if (next_func_start_entry) { |
| addr_t next_symbol_file_addr = next_func_start_entry->addr; |
| // Be sure the clear the Thumb address bit when we calculate the |
| // size from the current and next address |
| if (is_arm) |
| next_symbol_file_addr &= THUMB_ADDRESS_BIT_MASK; |
| symbol_byte_size = std::min<lldb::addr_t>( |
| next_symbol_file_addr - symbol_file_addr, |
| section_end_file_addr - symbol_file_addr); |
| } else { |
| symbol_byte_size = section_end_file_addr - symbol_file_addr; |
| } |
| } |
| } |
| symbol_value -= section_file_addr; |
| } |
| |
| if (!is_debug) { |
| if (type == eSymbolTypeCode) { |
| // See if we can find a N_FUN entry for any code symbols. If we do |
| // find a match, and the name matches, then we can merge the two into |
| // just the function symbol to avoid duplicate entries in the symbol |
| // table. |
| std::pair<ValueToSymbolIndexMap::const_iterator, |
| ValueToSymbolIndexMap::const_iterator> |
| range; |
| range = N_FUN_addr_to_sym_idx.equal_range(nlist.n_value); |
| if (range.first != range.second) { |
| for (ValueToSymbolIndexMap::const_iterator pos = range.first; |
| pos != range.second; ++pos) { |
| if (sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled) == |
| sym[pos->second].GetMangled().GetName( |
| Mangled::ePreferMangled)) { |
| m_nlist_idx_to_sym_idx[nlist_idx] = pos->second; |
| // We just need the flags from the linker symbol, so put these |
| // flags into the N_FUN flags to avoid duplicate symbols in the |
| // symbol table. |
| sym[pos->second].SetExternal(sym[sym_idx].IsExternal()); |
| sym[pos->second].SetFlags(nlist.n_type << 16 | nlist.n_desc); |
| if (resolver_addresses.find(nlist.n_value) != |
| resolver_addresses.end()) |
| sym[pos->second].SetType(eSymbolTypeResolver); |
| sym[sym_idx].Clear(); |
| return true; |
| } |
| } |
| } else { |
| if (resolver_addresses.find(nlist.n_value) != |
| resolver_addresses.end()) |
| type = eSymbolTypeResolver; |
| } |
| } else if (type == eSymbolTypeData || type == eSymbolTypeObjCClass || |
| type == eSymbolTypeObjCMetaClass || |
| type == eSymbolTypeObjCIVar) { |
| // See if we can find a N_STSYM entry for any data symbols. If we do |
| // find a match, and the name matches, then we can merge the two into |
| // just the Static symbol to avoid duplicate entries in the symbol |
| // table. |
| std::pair<ValueToSymbolIndexMap::const_iterator, |
| ValueToSymbolIndexMap::const_iterator> |
| range; |
| range = N_STSYM_addr_to_sym_idx.equal_range(nlist.n_value); |
| if (range.first != range.second) { |
| for (ValueToSymbolIndexMap::const_iterator pos = range.first; |
| pos != range.second; ++pos) { |
| if (sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled) == |
| sym[pos->second].GetMangled().GetName( |
| Mangled::ePreferMangled)) { |
| m_nlist_idx_to_sym_idx[nlist_idx] = pos->second; |
| // We just need the flags from the linker symbol, so put these |
| // flags into the N_STSYM flags to avoid duplicate symbols in |
| // the symbol table. |
| sym[pos->second].SetExternal(sym[sym_idx].IsExternal()); |
| sym[pos->second].SetFlags(nlist.n_type << 16 | nlist.n_desc); |
| sym[sym_idx].Clear(); |
| return true; |
| } |
| } |
| } else { |
| // Combine N_GSYM stab entries with the non stab symbol. |
| const char *gsym_name = sym[sym_idx] |
| .GetMangled() |
| .GetName(Mangled::ePreferMangled) |
| .GetCString(); |
| if (gsym_name) { |
| ConstNameToSymbolIndexMap::const_iterator pos = |
| N_GSYM_name_to_sym_idx.find(gsym_name); |
| if (pos != N_GSYM_name_to_sym_idx.end()) { |
| const uint32_t GSYM_sym_idx = pos->second; |
| m_nlist_idx_to_sym_idx[nlist_idx] = GSYM_sym_idx; |
| // Copy the address, because often the N_GSYM address has an |
| // invalid address of zero when the global is a common symbol. |
| sym[GSYM_sym_idx].GetAddressRef().SetSection(symbol_section); |
| sym[GSYM_sym_idx].GetAddressRef().SetOffset(symbol_value); |
| add_symbol_addr( |
| sym[GSYM_sym_idx].GetAddress().GetFileAddress()); |
| // We just need the flags from the linker symbol, so put these |
| // flags into the N_GSYM flags to avoid duplicate symbols in |
| // the symbol table. |
| sym[GSYM_sym_idx].SetFlags(nlist.n_type << 16 | nlist.n_desc); |
| sym[sym_idx].Clear(); |
| return true; |
| } |
| } |
| } |
| } |
| } |
| |
| sym[sym_idx].SetID(nlist_idx); |
| sym[sym_idx].SetType(type); |
| if (set_value) { |
| sym[sym_idx].GetAddressRef().SetSection(symbol_section); |
| sym[sym_idx].GetAddressRef().SetOffset(symbol_value); |
| if (symbol_section) |
| add_symbol_addr(sym[sym_idx].GetAddress().GetFileAddress()); |
| } |
| sym[sym_idx].SetFlags(nlist.n_type << 16 | nlist.n_desc); |
| if (nlist.n_desc & N_WEAK_REF) |
| sym[sym_idx].SetIsWeak(true); |
| |
| if (symbol_byte_size > 0) |
| sym[sym_idx].SetByteSize(symbol_byte_size); |
| |
| if (demangled_is_synthesized) |
| sym[sym_idx].SetDemangledNameIsSynthesized(true); |
| |
| ++sym_idx; |
| return true; |
| }; |
| |
| // First parse all the nlists but don't process them yet. See the next |
| // comment for an explanation why. |
| std::vector<struct nlist_64> nlists; |
| nlists.reserve(symtab_load_command.nsyms); |
| for (; nlist_idx < symtab_load_command.nsyms; ++nlist_idx) { |
| if (auto nlist = |
| ParseNList(nlist_data, nlist_data_offset, nlist_byte_size)) |
| nlists.push_back(*nlist); |
| else |
| break; |
| } |
| |
| // Now parse all the debug symbols. This is needed to merge non-debug |
| // symbols in the next step. Non-debug symbols are always coalesced into |
| // the debug symbol. Doing this in one step would mean that some symbols |
| // won't be merged. |
| nlist_idx = 0; |
| for (auto &nlist : nlists) { |
| if (!ParseSymbolLambda(nlist, nlist_idx++, DebugSymbols)) |
| break; |
| } |
| |
| // Finally parse all the non debug symbols. |
| nlist_idx = 0; |
| for (auto &nlist : nlists) { |
| if (!ParseSymbolLambda(nlist, nlist_idx++, NonDebugSymbols)) |
| break; |
| } |
| |
| for (const auto &pos : reexport_shlib_needs_fixup) { |
| const auto undef_pos = undefined_name_to_desc.find(pos.second); |
| if (undef_pos != undefined_name_to_desc.end()) { |
| const uint8_t dylib_ordinal = |
| llvm::MachO::GET_LIBRARY_ORDINAL(undef_pos->second); |
| if (dylib_ordinal > 0 && dylib_ordinal < dylib_files.GetSize()) |
| sym[pos.first].SetReExportedSymbolSharedLibrary( |
| dylib_files.GetFileSpecAtIndex(dylib_ordinal - 1)); |
| } |
| } |
| } |
| |
| // Count how many trie symbols we'll add to the symbol table |
| int trie_symbol_table_augment_count = 0; |
| for (auto &e : external_sym_trie_entries) { |
| if (symbols_added.find(e.entry.address) == symbols_added.end()) |
| trie_symbol_table_augment_count++; |
| } |
| |
| if (num_syms < sym_idx + trie_symbol_table_augment_count) { |
| num_syms = sym_idx + trie_symbol_table_augment_count; |
| sym = symtab.Resize(num_syms); |
| } |
| uint32_t synthetic_sym_id = symtab_load_command.nsyms; |
| |
| // Add symbols from the trie to the symbol table. |
| for (auto &e : external_sym_trie_entries) { |
| if (symbols_added.contains(e.entry.address)) |
| continue; |
| |
| // Find the section that this trie address is in, use that to annotate |
| // symbol type as we add the trie address and name to the symbol table. |
| Address symbol_addr; |
| if (module_sp->ResolveFileAddress(e.entry.address, symbol_addr)) { |
| SectionSP symbol_section(symbol_addr.GetSection()); |
| const char *symbol_name = e.entry.name.GetCString(); |
| bool demangled_is_synthesized = false; |
| SymbolType type = |
| GetSymbolType(symbol_name, demangled_is_synthesized, text_section_sp, |
| data_section_sp, data_dirty_section_sp, |
| data_const_section_sp, symbol_section); |
| |
| sym[sym_idx].SetType(type); |
| if (symbol_section) { |
| sym[sym_idx].SetID(synthetic_sym_id++); |
| sym[sym_idx].GetMangled().SetMangledName(ConstString(symbol_name)); |
| if (demangled_is_synthesized) |
| sym[sym_idx].SetDemangledNameIsSynthesized(true); |
| sym[sym_idx].SetIsSynthetic(true); |
| sym[sym_idx].SetExternal(true); |
| sym[sym_idx].GetAddressRef() = symbol_addr; |
| add_symbol_addr(symbol_addr.GetFileAddress()); |
| if (e.entry.flags & TRIE_SYMBOL_IS_THUMB) |
| sym[sym_idx].SetFlags(MACHO_NLIST_ARM_SYMBOL_IS_THUMB); |
| ++sym_idx; |
| } |
| } |
| } |
| |
| if (function_starts_count > 0) { |
| uint32_t num_synthetic_function_symbols = 0; |
| for (i = 0; i < function_starts_count; ++i) { |
| if (symbols_added.find(function_starts.GetEntryRef(i).addr) == |
| symbols_added.end()) |
| ++num_synthetic_function_symbols; |
| } |
| |
| if (num_synthetic_function_symbols > 0) { |
| if (num_syms < sym_idx + num_synthetic_function_symbols) { |
| num_syms = sym_idx + num_synthetic_function_symbols; |
| sym = symtab.Resize(num_syms); |
| } |
| for (i = 0; i < function_starts_count; ++i) { |
| const FunctionStarts::Entry *func_start_entry = |
| function_starts.GetEntryAtIndex(i); |
| if (symbols_added.find(func_start_entry->addr) == symbols_added.end()) { |
| addr_t symbol_file_addr = func_start_entry->addr; |
| uint32_t symbol_flags = 0; |
| if (func_start_entry->data) |
| symbol_flags = MACHO_NLIST_ARM_SYMBOL_IS_THUMB; |
| Address symbol_addr; |
| if (module_sp->ResolveFileAddress(symbol_file_addr, symbol_addr)) { |
| SectionSP symbol_section(symbol_addr.GetSection()); |
| uint32_t symbol_byte_size = 0; |
| if (symbol_section) { |
| const addr_t section_file_addr = symbol_section->GetFileAddress(); |
| const FunctionStarts::Entry *next_func_start_entry = |
| function_starts.FindNextEntry(func_start_entry); |
| const addr_t section_end_file_addr = |
| section_file_addr + symbol_section->GetByteSize(); |
| if (next_func_start_entry) { |
| addr_t next_symbol_file_addr = next_func_start_entry->addr; |
| if (is_arm) |
| next_symbol_file_addr &= THUMB_ADDRESS_BIT_MASK; |
| symbol_byte_size = std::min<lldb::addr_t>( |
| next_symbol_file_addr - symbol_file_addr, |
| section_end_file_addr - symbol_file_addr); |
| } else { |
| symbol_byte_size = section_end_file_addr - symbol_file_addr; |
| } |
| sym[sym_idx].SetID(synthetic_sym_id++); |
| // Don't set the name for any synthetic symbols, the Symbol |
| // object will generate one if needed when the name is accessed |
| // via accessors. |
| sym[sym_idx].GetMangled().SetDemangledName(ConstString()); |
| sym[sym_idx].SetType(eSymbolTypeCode); |
| sym[sym_idx].SetIsSynthetic(true); |
| sym[sym_idx].GetAddressRef() = symbol_addr; |
| add_symbol_addr(symbol_addr.GetFileAddress()); |
| if (symbol_flags) |
| sym[sym_idx].SetFlags(symbol_flags); |
| if (symbol_byte_size) |
| sym[sym_idx].SetByteSize(symbol_byte_size); |
| ++sym_idx; |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| // Trim our symbols down to just what we ended up with after removing any |
| // symbols. |
| if (sym_idx < num_syms) { |
| num_syms = sym_idx; |
| sym = symtab.Resize(num_syms); |
| } |
| |
| // Now synthesize indirect symbols |
| if (m_dysymtab.nindirectsyms != 0) { |
| if (indirect_symbol_index_data.GetByteSize()) { |
| NListIndexToSymbolIndexMap::const_iterator end_index_pos = |
| m_nlist_idx_to_sym_idx.end(); |
| |
| for (uint32_t sect_idx = 1; sect_idx < m_mach_sections.size(); |
| ++sect_idx) { |
| if ((m_mach_sections[sect_idx].flags & SECTION_TYPE) == |
| S_SYMBOL_STUBS) { |
| uint32_t symbol_stub_byte_size = m_mach_sections[sect_idx].reserved2; |
| if (symbol_stub_byte_size == 0) |
| continue; |
| |
| const uint32_t num_symbol_stubs = |
| m_mach_sections[sect_idx].size / symbol_stub_byte_size; |
| |
| if (num_symbol_stubs == 0) |
| continue; |
| |
| const uint32_t symbol_stub_index_offset = |
| m_mach_sections[sect_idx].reserved1; |
| for (uint32_t stub_idx = 0; stub_idx < num_symbol_stubs; ++stub_idx) { |
| const uint32_t symbol_stub_index = |
| symbol_stub_index_offset + stub_idx; |
| const lldb::addr_t symbol_stub_addr = |
| m_mach_sections[sect_idx].addr + |
| (stub_idx * symbol_stub_byte_size); |
| lldb::offset_t symbol_stub_offset = symbol_stub_index * 4; |
| if (indirect_symbol_index_data.ValidOffsetForDataOfSize( |
| symbol_stub_offset, 4)) { |
| const uint32_t stub_sym_id = |
| indirect_symbol_index_data.GetU32(&symbol_stub_offset); |
| if (stub_sym_id & (INDIRECT_SYMBOL_ABS | INDIRECT_SYMBOL_LOCAL)) |
| continue; |
| |
| NListIndexToSymbolIndexMap::const_iterator index_pos = |
| m_nlist_idx_to_sym_idx.find(stub_sym_id); |
| Symbol *stub_symbol = nullptr; |
| if (index_pos != end_index_pos) { |
| // We have a remapping from the original nlist index to a |
| // current symbol index, so just look this up by index |
| stub_symbol = symtab.SymbolAtIndex(index_pos->second); |
| } else { |
| // We need to lookup a symbol using the original nlist symbol |
| // index since this index is coming from the S_SYMBOL_STUBS |
| stub_symbol = symtab.FindSymbolByID(stub_sym_id); |
| } |
| |
| if (stub_symbol) { |
| Address so_addr(symbol_stub_addr, section_list); |
| |
| if (stub_symbol->GetType() == eSymbolTypeUndefined) { |
| // Change the external symbol into a trampoline that makes |
| // sense These symbols were N_UNDF N_EXT, and are useless |
| // to us, so we can re-use them so we don't have to make up |
| // a synthetic symbol for no good reason. |
| if (resolver_addresses.find(symbol_stub_addr) == |
| resolver_addresses.end()) |
| stub_symbol->SetType(eSymbolTypeTrampoline); |
| else |
| stub_symbol->SetType(eSymbolTypeResolver); |
| stub_symbol->SetExternal(false); |
| stub_symbol->GetAddressRef() = so_addr; |
| stub_symbol->SetByteSize(symbol_stub_byte_size); |
| } else { |
| // Make a synthetic symbol to describe the trampoline stub |
| Mangled stub_symbol_mangled_name(stub_symbol->GetMangled()); |
| if (sym_idx >= num_syms) { |
| sym = symtab.Resize(++num_syms); |
| stub_symbol = nullptr; // this pointer no longer valid |
| } |
| sym[sym_idx].SetID(synthetic_sym_id++); |
| sym[sym_idx].GetMangled() = stub_symbol_mangled_name; |
| if (resolver_addresses.find(symbol_stub_addr) == |
| resolver_addresses.end()) |
| sym[sym_idx].SetType(eSymbolTypeTrampoline); |
| else |
| sym[sym_idx].SetType(eSymbolTypeResolver); |
| sym[sym_idx].SetIsSynthetic(true); |
| sym[sym_idx].GetAddressRef() = so_addr; |
| add_symbol_addr(so_addr.GetFileAddress()); |
| sym[sym_idx].SetByteSize(symbol_stub_byte_size); |
| ++sym_idx; |
| } |
| } else { |
| if (log) |
| log->Warning("symbol stub referencing symbol table symbol " |
| "%u that isn't in our minimal symbol table, " |
| "fix this!!!", |
| stub_sym_id); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| if (!reexport_trie_entries.empty()) { |
| for (const auto &e : reexport_trie_entries) { |
| if (e.entry.import_name) { |
| // Only add indirect symbols from the Trie entries if we didn't have |
| // a N_INDR nlist entry for this already |
| if (indirect_symbol_names.find(e.entry.name) == |
| indirect_symbol_names.end()) { |
| // Make a synthetic symbol to describe re-exported symbol. |
| if (sym_idx >= num_syms) |
| sym = symtab.Resize(++num_syms); |
| sym[sym_idx].SetID(synthetic_sym_id++); |
| sym[sym_idx].GetMangled() = Mangled(e.entry.name); |
| sym[sym_idx].SetType(eSymbolTypeReExported); |
| sym[sym_idx].SetIsSynthetic(true); |
| sym[sym_idx].SetReExportedSymbolName(e.entry.import_name); |
| if (e.entry.other > 0 && e.entry.other <= dylib_files.GetSize()) { |
| sym[sym_idx].SetReExportedSymbolSharedLibrary( |
| dylib_files.GetFileSpecAtIndex(e.entry.other - 1)); |
| } |
| ++sym_idx; |
| } |
| } |
| } |
| } |
| } |
| |
| void ObjectFileMachO::Dump(Stream *s) { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| s->Printf("%p: ", static_cast<void *>(this)); |
| s->Indent(); |
| if (m_header.magic == MH_MAGIC_64 || m_header.magic == MH_CIGAM_64) |
| s->PutCString("ObjectFileMachO64"); |
| else |
| s->PutCString("ObjectFileMachO32"); |
| |
| *s << ", file = '" << m_file; |
| ModuleSpecList all_specs; |
| ModuleSpec base_spec; |
| GetAllArchSpecs(m_header, m_data, MachHeaderSizeFromMagic(m_header.magic), |
| base_spec, all_specs); |
| for (unsigned i = 0, e = all_specs.GetSize(); i != e; ++i) { |
| *s << "', triple"; |
| if (e) |
| s->Printf("[%d]", i); |
| *s << " = "; |
| *s << all_specs.GetModuleSpecRefAtIndex(i) |
| .GetArchitecture() |
| .GetTriple() |
| .getTriple(); |
| } |
| *s << "\n"; |
| SectionList *sections = GetSectionList(); |
| if (sections) |
| sections->Dump(s->AsRawOstream(), s->GetIndentLevel(), nullptr, true, |
| UINT32_MAX); |
| |
| if (m_symtab_up) |
| m_symtab_up->Dump(s, nullptr, eSortOrderNone); |
| } |
| } |
| |
| UUID ObjectFileMachO::GetUUID(const llvm::MachO::mach_header &header, |
| const lldb_private::DataExtractor &data, |
| lldb::offset_t lc_offset) { |
| uint32_t i; |
| llvm::MachO::uuid_command load_cmd; |
| |
| lldb::offset_t offset = lc_offset; |
| for (i = 0; i < header.ncmds; ++i) { |
| const lldb::offset_t cmd_offset = offset; |
| if (data.GetU32(&offset, &load_cmd, 2) == nullptr) |
| break; |
| |
| if (load_cmd.cmd == LC_UUID) { |
| const uint8_t *uuid_bytes = data.PeekData(offset, 16); |
| |
| if (uuid_bytes) { |
| // OpenCL on Mac OS X uses the same UUID for each of its object files. |
| // We pretend these object files have no UUID to prevent crashing. |
| |
| const uint8_t opencl_uuid[] = {0x8c, 0x8e, 0xb3, 0x9b, 0x3b, 0xa8, |
| 0x4b, 0x16, 0xb6, 0xa4, 0x27, 0x63, |
| 0xbb, 0x14, 0xf0, 0x0d}; |
| |
| if (!memcmp(uuid_bytes, opencl_uuid, 16)) |
| return UUID(); |
| |
| return UUID::fromOptionalData(uuid_bytes, 16); |
| } |
| return UUID(); |
| } |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| return UUID(); |
| } |
| |
| static llvm::StringRef GetOSName(uint32_t cmd) { |
| switch (cmd) { |
| case llvm::MachO::LC_VERSION_MIN_IPHONEOS: |
| return llvm::Triple::getOSTypeName(llvm::Triple::IOS); |
| case llvm::MachO::LC_VERSION_MIN_MACOSX: |
| return llvm::Triple::getOSTypeName(llvm::Triple::MacOSX); |
| case llvm::MachO::LC_VERSION_MIN_TVOS: |
| return llvm::Triple::getOSTypeName(llvm::Triple::TvOS); |
| case llvm::MachO::LC_VERSION_MIN_WATCHOS: |
| return llvm::Triple::getOSTypeName(llvm::Triple::WatchOS); |
| default: |
| llvm_unreachable("unexpected LC_VERSION load command"); |
| } |
| } |
| |
| namespace { |
| struct OSEnv { |
| llvm::StringRef os_type; |
| llvm::StringRef environment; |
| OSEnv(uint32_t cmd) { |
| switch (cmd) { |
| case llvm::MachO::PLATFORM_MACOS: |
| os_type = llvm::Triple::getOSTypeName(llvm::Triple::MacOSX); |
| return; |
| case llvm::MachO::PLATFORM_IOS: |
| os_type = llvm::Triple::getOSTypeName(llvm::Triple::IOS); |
| return; |
| case llvm::MachO::PLATFORM_TVOS: |
| os_type = llvm::Triple::getOSTypeName(llvm::Triple::TvOS); |
| return; |
| case llvm::MachO::PLATFORM_WATCHOS: |
| os_type = llvm::Triple::getOSTypeName(llvm::Triple::WatchOS); |
| return; |
| // TODO: add BridgeOS & DriverKit once in llvm/lib/Support/Triple.cpp |
| // NEED_BRIDGEOS_TRIPLE |
| // case llvm::MachO::PLATFORM_BRIDGEOS: |
| // os_type = llvm::Triple::getOSTypeName(llvm::Triple::BridgeOS); |
| // return; |
| // case llvm::MachO::PLATFORM_DRIVERKIT: |
| // os_type = llvm::Triple::getOSTypeName(llvm::Triple::DriverKit); |
| // return; |
| case llvm::MachO::PLATFORM_MACCATALYST: |
| os_type = llvm::Triple::getOSTypeName(llvm::Triple::IOS); |
| environment = llvm::Triple::getEnvironmentTypeName(llvm::Triple::MacABI); |
| return; |
| case llvm::MachO::PLATFORM_IOSSIMULATOR: |
| os_type = llvm::Triple::getOSTypeName(llvm::Triple::IOS); |
| environment = |
| llvm::Triple::getEnvironmentTypeName(llvm::Triple::Simulator); |
| return; |
| case llvm::MachO::PLATFORM_TVOSSIMULATOR: |
| os_type = llvm::Triple::getOSTypeName(llvm::Triple::TvOS); |
| environment = |
| llvm::Triple::getEnvironmentTypeName(llvm::Triple::Simulator); |
| return; |
| case llvm::MachO::PLATFORM_WATCHOSSIMULATOR: |
| os_type = llvm::Triple::getOSTypeName(llvm::Triple::WatchOS); |
| environment = |
| llvm::Triple::getEnvironmentTypeName(llvm::Triple::Simulator); |
| return; |
| default: { |
| Log *log(GetLog(LLDBLog::Symbols | LLDBLog::Process)); |
| LLDB_LOGF(log, "unsupported platform in LC_BUILD_VERSION"); |
| } |
| } |
| } |
| }; |
| |
| struct MinOS { |
| uint32_t major_version, minor_version, patch_version; |
| MinOS(uint32_t version) |
| : major_version(version >> 16), minor_version((version >> 8) & 0xffu), |
| patch_version(version & 0xffu) {} |
| }; |
| } // namespace |
| |
| void ObjectFileMachO::GetAllArchSpecs(const llvm::MachO::mach_header &header, |
| const lldb_private::DataExtractor &data, |
| lldb::offset_t lc_offset, |
| ModuleSpec &base_spec, |
| lldb_private::ModuleSpecList &all_specs) { |
| auto &base_arch = base_spec.GetArchitecture(); |
| base_arch.SetArchitecture(eArchTypeMachO, header.cputype, header.cpusubtype); |
| if (!base_arch.IsValid()) |
| return; |
| |
| bool found_any = false; |
| auto add_triple = [&](const llvm::Triple &triple) { |
| auto spec = base_spec; |
| spec.GetArchitecture().GetTriple() = triple; |
| if (spec.GetArchitecture().IsValid()) { |
| spec.GetUUID() = ObjectFileMachO::GetUUID(header, data, lc_offset); |
| all_specs.Append(spec); |
| found_any = true; |
| } |
| }; |
| |
| // Set OS to an unspecified unknown or a "*" so it can match any OS |
| llvm::Triple base_triple = base_arch.GetTriple(); |
| base_triple.setOS(llvm::Triple::UnknownOS); |
| base_triple.setOSName(llvm::StringRef()); |
| |
| if (header.filetype == MH_PRELOAD) { |
| if (header.cputype == CPU_TYPE_ARM) { |
| // If this is a 32-bit arm binary, and it's a standalone binary, force |
| // the Vendor to Apple so we don't accidentally pick up the generic |
| // armv7 ABI at runtime. Apple's armv7 ABI always uses r7 for the |
| // frame pointer register; most other armv7 ABIs use a combination of |
| // r7 and r11. |
| base_triple.setVendor(llvm::Triple::Apple); |
| } else { |
| // Set vendor to an unspecified unknown or a "*" so it can match any |
| // vendor This is required for correct behavior of EFI debugging on |
| // x86_64 |
| base_triple.setVendor(llvm::Triple::UnknownVendor); |
| base_triple.setVendorName(llvm::StringRef()); |
| } |
| return add_triple(base_triple); |
| } |
| |
| llvm::MachO::load_command load_cmd; |
| |
| // See if there is an LC_VERSION_MIN_* load command that can give |
| // us the OS type. |
| lldb::offset_t offset = lc_offset; |
| for (uint32_t i = 0; i < header.ncmds; ++i) { |
| const lldb::offset_t cmd_offset = offset; |
| if (data.GetU32(&offset, &load_cmd, 2) == nullptr) |
| break; |
| |
| llvm::MachO::version_min_command version_min; |
| switch (load_cmd.cmd) { |
| case llvm::MachO::LC_VERSION_MIN_MACOSX: |
| case llvm::MachO::LC_VERSION_MIN_IPHONEOS: |
| case llvm::MachO::LC_VERSION_MIN_TVOS: |
| case llvm::MachO::LC_VERSION_MIN_WATCHOS: { |
| if (load_cmd.cmdsize != sizeof(version_min)) |
| break; |
| if (data.ExtractBytes(cmd_offset, sizeof(version_min), |
| data.GetByteOrder(), &version_min) == 0) |
| break; |
| MinOS min_os(version_min.version); |
| llvm::SmallString<32> os_name; |
| llvm::raw_svector_ostream os(os_name); |
| os << GetOSName(load_cmd.cmd) << min_os.major_version << '.' |
| << min_os.minor_version << '.' << min_os.patch_version; |
| |
| auto triple = base_triple; |
| triple.setOSName(os.str()); |
| |
| // Disambiguate legacy simulator platforms. |
| if (load_cmd.cmd != llvm::MachO::LC_VERSION_MIN_MACOSX && |
| (base_triple.getArch() == llvm::Triple::x86_64 || |
| base_triple.getArch() == llvm::Triple::x86)) { |
| // The combination of legacy LC_VERSION_MIN load command and |
| // x86 architecture always indicates a simulator environment. |
| // The combination of LC_VERSION_MIN and arm architecture only |
| // appears for native binaries. Back-deploying simulator |
| // binaries on Apple Silicon Macs use the modern unambigous |
| // LC_BUILD_VERSION load commands; no special handling required. |
| triple.setEnvironment(llvm::Triple::Simulator); |
| } |
| add_triple(triple); |
| break; |
| } |
| default: |
| break; |
| } |
| |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| |
| // See if there are LC_BUILD_VERSION load commands that can give |
| // us the OS type. |
| offset = lc_offset; |
| for (uint32_t i = 0; i < header.ncmds; ++i) { |
| const lldb::offset_t cmd_offset = offset; |
| if (data.GetU32(&offset, &load_cmd, 2) == nullptr) |
| break; |
| |
| do { |
| if (load_cmd.cmd == llvm::MachO::LC_BUILD_VERSION) { |
| llvm::MachO::build_version_command build_version; |
| if (load_cmd.cmdsize < sizeof(build_version)) { |
| // Malformed load command. |
| break; |
| } |
| if (data.ExtractBytes(cmd_offset, sizeof(build_version), |
| data.GetByteOrder(), &build_version) == 0) |
| break; |
| MinOS min_os(build_version.minos); |
| OSEnv os_env(build_version.platform); |
| llvm::SmallString<16> os_name; |
| llvm::raw_svector_ostream os(os_name); |
| os << os_env.os_type << min_os.major_version << '.' |
| << min_os.minor_version << '.' << min_os.patch_version; |
| auto triple = base_triple; |
| triple.setOSName(os.str()); |
| os_name.clear(); |
| if (!os_env.environment.empty()) |
| triple.setEnvironmentName(os_env.environment); |
| add_triple(triple); |
| } |
| } while (false); |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| |
| if (!found_any) { |
| add_triple(base_triple); |
| } |
| } |
| |
| ArchSpec ObjectFileMachO::GetArchitecture( |
| ModuleSP module_sp, const llvm::MachO::mach_header &header, |
| const lldb_private::DataExtractor &data, lldb::offset_t lc_offset) { |
| ModuleSpecList all_specs; |
| ModuleSpec base_spec; |
| GetAllArchSpecs(header, data, MachHeaderSizeFromMagic(header.magic), |
| base_spec, all_specs); |
| |
| // If the object file offers multiple alternative load commands, |
| // pick the one that matches the module. |
| if (module_sp) { |
| const ArchSpec &module_arch = module_sp->GetArchitecture(); |
| for (unsigned i = 0, e = all_specs.GetSize(); i != e; ++i) { |
| ArchSpec mach_arch = |
| all_specs.GetModuleSpecRefAtIndex(i).GetArchitecture(); |
| if (module_arch.IsCompatibleMatch(mach_arch)) |
| return mach_arch; |
| } |
| } |
| |
| // Return the first arch we found. |
| if (all_specs.GetSize() == 0) |
| return {}; |
| return all_specs.GetModuleSpecRefAtIndex(0).GetArchitecture(); |
| } |
| |
| UUID ObjectFileMachO::GetUUID() { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| return GetUUID(m_header, m_data, offset); |
| } |
| return UUID(); |
| } |
| |
| uint32_t ObjectFileMachO::GetDependentModules(FileSpecList &files) { |
| uint32_t count = 0; |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| llvm::MachO::load_command load_cmd; |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| std::vector<std::string> rpath_paths; |
| std::vector<std::string> rpath_relative_paths; |
| std::vector<std::string> at_exec_relative_paths; |
| uint32_t i; |
| for (i = 0; i < m_header.ncmds; ++i) { |
| const uint32_t cmd_offset = offset; |
| if (m_data.GetU32(&offset, &load_cmd, 2) == nullptr) |
| break; |
| |
| switch (load_cmd.cmd) { |
| case LC_RPATH: |
| case LC_LOAD_DYLIB: |
| case LC_LOAD_WEAK_DYLIB: |
| case LC_REEXPORT_DYLIB: |
| case LC_LOAD_DYLINKER: |
| case LC_LOADFVMLIB: |
| case LC_LOAD_UPWARD_DYLIB: { |
| uint32_t name_offset = cmd_offset + m_data.GetU32(&offset); |
| const char *path = m_data.PeekCStr(name_offset); |
| if (path) { |
| if (load_cmd.cmd == LC_RPATH) |
| rpath_paths.push_back(path); |
| else { |
| if (path[0] == '@') { |
| if (strncmp(path, "@rpath", strlen("@rpath")) == 0) |
| rpath_relative_paths.push_back(path + strlen("@rpath")); |
| else if (strncmp(path, "@executable_path", |
| strlen("@executable_path")) == 0) |
| at_exec_relative_paths.push_back(path + |
| strlen("@executable_path")); |
| } else { |
| FileSpec file_spec(path); |
| if (files.AppendIfUnique(file_spec)) |
| count++; |
| } |
| } |
| } |
| } break; |
| |
| default: |
| break; |
| } |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| |
| FileSpec this_file_spec(m_file); |
| FileSystem::Instance().Resolve(this_file_spec); |
| |
| if (!rpath_paths.empty()) { |
| // Fixup all LC_RPATH values to be absolute paths |
| std::string loader_path("@loader_path"); |
| std::string executable_path("@executable_path"); |
| for (auto &rpath : rpath_paths) { |
| if (llvm::StringRef(rpath).startswith(loader_path)) { |
| rpath.erase(0, loader_path.size()); |
| rpath.insert(0, this_file_spec.GetDirectory().GetCString()); |
| } else if (llvm::StringRef(rpath).startswith(executable_path)) { |
| rpath.erase(0, executable_path.size()); |
| rpath.insert(0, this_file_spec.GetDirectory().GetCString()); |
| } |
| } |
| |
| for (const auto &rpath_relative_path : rpath_relative_paths) { |
| for (const auto &rpath : rpath_paths) { |
| std::string path = rpath; |
| path += rpath_relative_path; |
| // It is OK to resolve this path because we must find a file on disk |
| // for us to accept it anyway if it is rpath relative. |
| FileSpec file_spec(path); |
| FileSystem::Instance().Resolve(file_spec); |
| if (FileSystem::Instance().Exists(file_spec) && |
| files.AppendIfUnique(file_spec)) { |
| count++; |
| break; |
| } |
| } |
| } |
| } |
| |
| // We may have @executable_paths but no RPATHS. Figure those out here. |
| // Only do this if this object file is the executable. We have no way to |
| // get back to the actual executable otherwise, so we won't get the right |
| // path. |
| if (!at_exec_relative_paths.empty() && CalculateType() == eTypeExecutable) { |
| FileSpec exec_dir = this_file_spec.CopyByRemovingLastPathComponent(); |
| for (const auto &at_exec_relative_path : at_exec_relative_paths) { |
| FileSpec file_spec = |
| exec_dir.CopyByAppendingPathComponent(at_exec_relative_path); |
| if (FileSystem::Instance().Exists(file_spec) && |
| files.AppendIfUnique(file_spec)) |
| count++; |
| } |
| } |
| } |
| return count; |
| } |
| |
| lldb_private::Address ObjectFileMachO::GetEntryPointAddress() { |
| // If the object file is not an executable it can't hold the entry point. |
| // m_entry_point_address is initialized to an invalid address, so we can just |
| // return that. If m_entry_point_address is valid it means we've found it |
| // already, so return the cached value. |
| |
| if ((!IsExecutable() && !IsDynamicLoader()) || |
| m_entry_point_address.IsValid()) { |
| return m_entry_point_address; |
| } |
| |
| // Otherwise, look for the UnixThread or Thread command. The data for the |
| // Thread command is given in /usr/include/mach-o.h, but it is basically: |
| // |
| // uint32_t flavor - this is the flavor argument you would pass to |
| // thread_get_state |
| // uint32_t count - this is the count of longs in the thread state data |
| // struct XXX_thread_state state - this is the structure from |
| // <machine/thread_status.h> corresponding to the flavor. |
| // <repeat this trio> |
| // |
| // So we just keep reading the various register flavors till we find the GPR |
| // one, then read the PC out of there. |
| // FIXME: We will need to have a "RegisterContext data provider" class at some |
| // point that can get all the registers |
| // out of data in this form & attach them to a given thread. That should |
| // underlie the MacOS X User process plugin, and we'll also need it for the |
| // MacOS X Core File process plugin. When we have that we can also use it |
| // here. |
| // |
| // For now we hard-code the offsets and flavors we need: |
| // |
| // |
| |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| llvm::MachO::load_command load_cmd; |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| uint32_t i; |
| lldb::addr_t start_address = LLDB_INVALID_ADDRESS; |
| bool done = false; |
| |
| for (i = 0; i < m_header.ncmds; ++i) { |
| const lldb::offset_t cmd_offset = offset; |
| if (m_data.GetU32(&offset, &load_cmd, 2) == nullptr) |
| break; |
| |
| switch (load_cmd.cmd) { |
| case LC_UNIXTHREAD: |
| case LC_THREAD: { |
| while (offset < cmd_offset + load_cmd.cmdsize) { |
| uint32_t flavor = m_data.GetU32(&offset); |
| uint32_t count = m_data.GetU32(&offset); |
| if (count == 0) { |
| // We've gotten off somehow, log and exit; |
| return m_entry_point_address; |
| } |
| |
| switch (m_header.cputype) { |
| case llvm::MachO::CPU_TYPE_ARM: |
| if (flavor == 1 || |
| flavor == 9) // ARM_THREAD_STATE/ARM_THREAD_STATE32 |
| // from mach/arm/thread_status.h |
| { |
| offset += 60; // This is the offset of pc in the GPR thread state |
| // data structure. |
| start_address = m_data.GetU32(&offset); |
| done = true; |
| } |
| break; |
| case llvm::MachO::CPU_TYPE_ARM64: |
| case llvm::MachO::CPU_TYPE_ARM64_32: |
| if (flavor == 6) // ARM_THREAD_STATE64 from mach/arm/thread_status.h |
| { |
| offset += 256; // This is the offset of pc in the GPR thread state |
| // data structure. |
| start_address = m_data.GetU64(&offset); |
| done = true; |
| } |
| break; |
| case llvm::MachO::CPU_TYPE_I386: |
| if (flavor == |
| 1) // x86_THREAD_STATE32 from mach/i386/thread_status.h |
| { |
| offset += 40; // This is the offset of eip in the GPR thread state |
| // data structure. |
| start_address = m_data.GetU32(&offset); |
| done = true; |
| } |
| break; |
| case llvm::MachO::CPU_TYPE_X86_64: |
| if (flavor == |
| 4) // x86_THREAD_STATE64 from mach/i386/thread_status.h |
| { |
| offset += 16 * 8; // This is the offset of rip in the GPR thread |
| // state data structure. |
| start_address = m_data.GetU64(&offset); |
| done = true; |
| } |
| break; |
| default: |
| return m_entry_point_address; |
| } |
| // Haven't found the GPR flavor yet, skip over the data for this |
| // flavor: |
| if (done) |
| break; |
| offset += count * 4; |
| } |
| } break; |
| case LC_MAIN: { |
| ConstString text_segment_name("__TEXT"); |
| uint64_t entryoffset = m_data.GetU64(&offset); |
| SectionSP text_segment_sp = |
| GetSectionList()->FindSectionByName(text_segment_name); |
| if (text_segment_sp) { |
| done = true; |
| start_address = text_segment_sp->GetFileAddress() + entryoffset; |
| } |
| } break; |
| |
| default: |
| break; |
| } |
| if (done) |
| break; |
| |
| // Go to the next load command: |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| |
| if (start_address == LLDB_INVALID_ADDRESS && IsDynamicLoader()) { |
| if (GetSymtab()) { |
| Symbol *dyld_start_sym = GetSymtab()->FindFirstSymbolWithNameAndType( |
| ConstString("_dyld_start"), SymbolType::eSymbolTypeCode, |
| Symtab::eDebugAny, Symtab::eVisibilityAny); |
| if (dyld_start_sym && dyld_start_sym->GetAddress().IsValid()) { |
| start_address = dyld_start_sym->GetAddress().GetFileAddress(); |
| } |
| } |
| } |
| |
| if (start_address != LLDB_INVALID_ADDRESS) { |
| // We got the start address from the load commands, so now resolve that |
| // address in the sections of this ObjectFile: |
| if (!m_entry_point_address.ResolveAddressUsingFileSections( |
| start_address, GetSectionList())) { |
| m_entry_point_address.Clear(); |
| } |
| } else { |
| // We couldn't read the UnixThread load command - maybe it wasn't there. |
| // As a fallback look for the "start" symbol in the main executable. |
| |
| ModuleSP module_sp(GetModule()); |
| |
| if (module_sp) { |
| SymbolContextList contexts; |
| SymbolContext context; |
| module_sp->FindSymbolsWithNameAndType(ConstString("start"), |
| eSymbolTypeCode, contexts); |
| if (contexts.GetSize()) { |
| if (contexts.GetContextAtIndex(0, context)) |
| m_entry_point_address = context.symbol->GetAddress(); |
| } |
| } |
| } |
| } |
| |
| return m_entry_point_address; |
| } |
| |
| lldb_private::Address ObjectFileMachO::GetBaseAddress() { |
| lldb_private::Address header_addr; |
| SectionList *section_list = GetSectionList(); |
| if (section_list) { |
| SectionSP text_segment_sp( |
| section_list->FindSectionByName(GetSegmentNameTEXT())); |
| if (text_segment_sp) { |
| header_addr.SetSection(text_segment_sp); |
| header_addr.SetOffset(0); |
| } |
| } |
| return header_addr; |
| } |
| |
| uint32_t ObjectFileMachO::GetNumThreadContexts() { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| if (!m_thread_context_offsets_valid) { |
| m_thread_context_offsets_valid = true; |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| FileRangeArray::Entry file_range; |
| llvm::MachO::thread_command thread_cmd; |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const uint32_t cmd_offset = offset; |
| if (m_data.GetU32(&offset, &thread_cmd, 2) == nullptr) |
| break; |
| |
| if (thread_cmd.cmd == LC_THREAD) { |
| file_range.SetRangeBase(offset); |
| file_range.SetByteSize(thread_cmd.cmdsize - 8); |
| m_thread_context_offsets.Append(file_range); |
| } |
| offset = cmd_offset + thread_cmd.cmdsize; |
| } |
| } |
| } |
| return m_thread_context_offsets.GetSize(); |
| } |
| |
| std::string ObjectFileMachO::GetIdentifierString() { |
| std::string result; |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| |
| // First, look over the load commands for an LC_NOTE load command with |
| // data_owner string "kern ver str" & use that if found. |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const uint32_t cmd_offset = offset; |
| llvm::MachO::load_command lc = {}; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == nullptr) |
| break; |
| if (lc.cmd == LC_NOTE) { |
| char data_owner[17]; |
| m_data.CopyData(offset, 16, data_owner); |
| data_owner[16] = '\0'; |
| offset += 16; |
| uint64_t fileoff = m_data.GetU64_unchecked(&offset); |
| uint64_t size = m_data.GetU64_unchecked(&offset); |
| |
| // "kern ver str" has a uint32_t version and then a nul terminated |
| // c-string. |
| if (strcmp("kern ver str", data_owner) == 0) { |
| offset = fileoff; |
| uint32_t version; |
| if (m_data.GetU32(&offset, &version, 1) != nullptr) { |
| if (version == 1) { |
| uint32_t strsize = size - sizeof(uint32_t); |
| char *buf = (char *)malloc(strsize); |
| if (buf) { |
| m_data.CopyData(offset, strsize, buf); |
| buf[strsize - 1] = '\0'; |
| result = buf; |
| if (buf) |
| free(buf); |
| return result; |
| } |
| } |
| } |
| } |
| } |
| offset = cmd_offset + lc.cmdsize; |
| } |
| |
| // Second, make a pass over the load commands looking for an obsolete |
| // LC_IDENT load command. |
| offset = MachHeaderSizeFromMagic(m_header.magic); |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const uint32_t cmd_offset = offset; |
| llvm::MachO::ident_command ident_command; |
| if (m_data.GetU32(&offset, &ident_command, 2) == nullptr) |
| break; |
| if (ident_command.cmd == LC_IDENT && ident_command.cmdsize != 0) { |
| char *buf = (char *)malloc(ident_command.cmdsize); |
| if (buf != nullptr && m_data.CopyData(offset, ident_command.cmdsize, |
| buf) == ident_command.cmdsize) { |
| buf[ident_command.cmdsize - 1] = '\0'; |
| result = buf; |
| } |
| if (buf) |
| free(buf); |
| } |
| offset = cmd_offset + ident_command.cmdsize; |
| } |
| } |
| return result; |
| } |
| |
| addr_t ObjectFileMachO::GetAddressMask() { |
| addr_t mask = 0; |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const uint32_t cmd_offset = offset; |
| llvm::MachO::load_command lc = {}; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == nullptr) |
| break; |
| if (lc.cmd == LC_NOTE) { |
| char data_owner[17]; |
| m_data.CopyData(offset, 16, data_owner); |
| data_owner[16] = '\0'; |
| offset += 16; |
| uint64_t fileoff = m_data.GetU64_unchecked(&offset); |
| |
| // "addrable bits" has a uint32_t version and a uint32_t |
| // number of bits used in addressing. |
| if (strcmp("addrable bits", data_owner) == 0) { |
| offset = fileoff; |
| uint32_t version; |
| if (m_data.GetU32(&offset, &version, 1) != nullptr) { |
| if (version == 3) { |
| uint32_t num_addr_bits = m_data.GetU32_unchecked(&offset); |
| if (num_addr_bits != 0) { |
| mask = ~((1ULL << num_addr_bits) - 1); |
| } |
| break; |
| } |
| } |
| } |
| } |
| offset = cmd_offset + lc.cmdsize; |
| } |
| } |
| return mask; |
| } |
| |
| bool ObjectFileMachO::GetCorefileMainBinaryInfo(addr_t &value, |
| bool &value_is_offset, |
| UUID &uuid, |
| ObjectFile::BinaryType &type) { |
| value = LLDB_INVALID_ADDRESS; |
| value_is_offset = false; |
| uuid.Clear(); |
| uint32_t log2_pagesize = 0; // not currently passed up to caller |
| uint32_t platform = 0; // not currently passed up to caller |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const uint32_t cmd_offset = offset; |
| llvm::MachO::load_command lc = {}; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == nullptr) |
| break; |
| if (lc.cmd == LC_NOTE) { |
| char data_owner[17]; |
| memset(data_owner, 0, sizeof(data_owner)); |
| m_data.CopyData(offset, 16, data_owner); |
| offset += 16; |
| uint64_t fileoff = m_data.GetU64_unchecked(&offset); |
| uint64_t size = m_data.GetU64_unchecked(&offset); |
| |
| // struct main_bin_spec |
| // { |
| // uint32_t version; // currently 2 |
| // uint32_t type; // 0 == unspecified, 1 == kernel, |
| // // 2 == user process, |
| // // 3 == standalone binary |
| // uint64_t address; // UINT64_MAX if address not specified |
| // uint64_t slide; // slide, UINT64_MAX if unspecified |
| // // 0 if no slide needs to be applied to |
| // // file address |
| // uuid_t uuid; // all zero's if uuid not specified |
| // uint32_t log2_pagesize; // process page size in log base 2, |
| // // e.g. 4k pages are 12. |
| // // 0 for unspecified |
| // uint32_t platform; // The Mach-O platform for this corefile. |
| // // 0 for unspecified. |
| // // The values are defined in |
| // // <mach-o/loader.h>, PLATFORM_*. |
| // } __attribute((packed)); |
| |
| // "main bin spec" (main binary specification) data payload is |
| // formatted: |
| // uint32_t version [currently 1] |
| // uint32_t type [0 == unspecified, 1 == kernel, |
| // 2 == user process, 3 == firmware ] |
| // uint64_t address [ UINT64_MAX if address not specified ] |
| // uuid_t uuid [ all zero's if uuid not specified ] |
| // uint32_t log2_pagesize [ process page size in log base |
| // 2, e.g. 4k pages are 12. |
| // 0 for unspecified ] |
| // uint32_t unused [ for alignment ] |
| |
| if (strcmp("main bin spec", data_owner) == 0 && size >= 32) { |
| offset = fileoff; |
| uint32_t version; |
| if (m_data.GetU32(&offset, &version, 1) != nullptr && version <= 2) { |
| uint32_t binspec_type = 0; |
| uuid_t raw_uuid; |
| memset(raw_uuid, 0, sizeof(uuid_t)); |
| |
| if (!m_data.GetU32(&offset, &binspec_type, 1)) |
| return false; |
| if (!m_data.GetU64(&offset, &value, 1)) |
| return false; |
| uint64_t slide = LLDB_INVALID_ADDRESS; |
| if (version > 1 && !m_data.GetU64(&offset, &slide, 1)) |
| return false; |
| if (value == LLDB_INVALID_ADDRESS && |
| slide != LLDB_INVALID_ADDRESS) { |
| value = slide; |
| value_is_offset = true; |
| } |
| |
| if (m_data.CopyData(offset, sizeof(uuid_t), raw_uuid) != 0) { |
| if (!uuid_is_null(raw_uuid)) |
| uuid = UUID::fromOptionalData(raw_uuid, sizeof(uuid_t)); |
| // convert the "main bin spec" type into our |
| // ObjectFile::BinaryType enum |
| switch (binspec_type) { |
| case 0: |
| type = eBinaryTypeUnknown; |
| break; |
| case 1: |
| type = eBinaryTypeKernel; |
| break; |
| case 2: |
| type = eBinaryTypeUser; |
| break; |
| case 3: |
| type = eBinaryTypeStandalone; |
| break; |
| } |
| if (!m_data.GetU32(&offset, &log2_pagesize, 1)) |
| return false; |
| if (version > 1 && !m_data.GetU32(&offset, &platform, 1)) |
| return false; |
| return true; |
| } |
| } |
| } |
| } |
| offset = cmd_offset + lc.cmdsize; |
| } |
| } |
| return false; |
| } |
| |
| lldb::RegisterContextSP |
| ObjectFileMachO::GetThreadContextAtIndex(uint32_t idx, |
| lldb_private::Thread &thread) { |
| lldb::RegisterContextSP reg_ctx_sp; |
| |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| if (!m_thread_context_offsets_valid) |
| GetNumThreadContexts(); |
| |
| const FileRangeArray::Entry *thread_context_file_range = |
| m_thread_context_offsets.GetEntryAtIndex(idx); |
| if (thread_context_file_range) { |
| |
| DataExtractor data(m_data, thread_context_file_range->GetRangeBase(), |
| thread_context_file_range->GetByteSize()); |
| |
| switch (m_header.cputype) { |
| case llvm::MachO::CPU_TYPE_ARM64: |
| case llvm::MachO::CPU_TYPE_ARM64_32: |
| reg_ctx_sp = |
| std::make_shared<RegisterContextDarwin_arm64_Mach>(thread, data); |
| break; |
| |
| case llvm::MachO::CPU_TYPE_ARM: |
| reg_ctx_sp = |
| std::make_shared<RegisterContextDarwin_arm_Mach>(thread, data); |
| break; |
| |
| case llvm::MachO::CPU_TYPE_I386: |
| reg_ctx_sp = |
| std::make_shared<RegisterContextDarwin_i386_Mach>(thread, data); |
| break; |
| |
| case llvm::MachO::CPU_TYPE_X86_64: |
| reg_ctx_sp = |
| std::make_shared<RegisterContextDarwin_x86_64_Mach>(thread, data); |
| break; |
| } |
| } |
| } |
| return reg_ctx_sp; |
| } |
| |
| ObjectFile::Type ObjectFileMachO::CalculateType() { |
| switch (m_header.filetype) { |
| case MH_OBJECT: // 0x1u |
| if (GetAddressByteSize() == 4) { |
| // 32 bit kexts are just object files, but they do have a valid |
| // UUID load command. |
| if (GetUUID()) { |
| // this checking for the UUID load command is not enough we could |
| // eventually look for the symbol named "OSKextGetCurrentIdentifier" as |
| // this is required of kexts |
| if (m_strata == eStrataInvalid) |
| m_strata = eStrataKernel; |
| return eTypeSharedLibrary; |
| } |
| } |
| return eTypeObjectFile; |
| |
| case MH_EXECUTE: |
| return eTypeExecutable; // 0x2u |
| case MH_FVMLIB: |
| return eTypeSharedLibrary; // 0x3u |
| case MH_CORE: |
| return eTypeCoreFile; // 0x4u |
| case MH_PRELOAD: |
| return eTypeSharedLibrary; // 0x5u |
| case MH_DYLIB: |
| return eTypeSharedLibrary; // 0x6u |
| case MH_DYLINKER: |
| return eTypeDynamicLinker; // 0x7u |
| case MH_BUNDLE: |
| return eTypeSharedLibrary; // 0x8u |
| case MH_DYLIB_STUB: |
| return eTypeStubLibrary; // 0x9u |
| case MH_DSYM: |
| return eTypeDebugInfo; // 0xAu |
| case MH_KEXT_BUNDLE: |
| return eTypeSharedLibrary; // 0xBu |
| default: |
| break; |
| } |
| return eTypeUnknown; |
| } |
| |
| ObjectFile::Strata ObjectFileMachO::CalculateStrata() { |
| switch (m_header.filetype) { |
| case MH_OBJECT: // 0x1u |
| { |
| // 32 bit kexts are just object files, but they do have a valid |
| // UUID load command. |
| if (GetUUID()) { |
| // this checking for the UUID load command is not enough we could |
| // eventually look for the symbol named "OSKextGetCurrentIdentifier" as |
| // this is required of kexts |
| if (m_type == eTypeInvalid) |
| m_type = eTypeSharedLibrary; |
| |
| return eStrataKernel; |
| } |
| } |
| return eStrataUnknown; |
| |
| case MH_EXECUTE: // 0x2u |
| // Check for the MH_DYLDLINK bit in the flags |
| if (m_header.flags & MH_DYLDLINK) { |
| return eStrataUser; |
| } else { |
| SectionList *section_list = GetSectionList(); |
| if (section_list) { |
| static ConstString g_kld_section_name("__KLD"); |
| if (section_list->FindSectionByName(g_kld_section_name)) |
| return eStrataKernel; |
| } |
| } |
| return eStrataRawImage; |
| |
| case MH_FVMLIB: |
| return eStrataUser; // 0x3u |
| case MH_CORE: |
| return eStrataUnknown; // 0x4u |
| case MH_PRELOAD: |
| return eStrataRawImage; // 0x5u |
| case MH_DYLIB: |
| return eStrataUser; // 0x6u |
| case MH_DYLINKER: |
| return eStrataUser; // 0x7u |
| case MH_BUNDLE: |
| return eStrataUser; // 0x8u |
| case MH_DYLIB_STUB: |
| return eStrataUser; // 0x9u |
| case MH_DSYM: |
| return eStrataUnknown; // 0xAu |
| case MH_KEXT_BUNDLE: |
| return eStrataKernel; // 0xBu |
| default: |
| break; |
| } |
| return eStrataUnknown; |
| } |
| |
| llvm::VersionTuple ObjectFileMachO::GetVersion() { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| llvm::MachO::dylib_command load_cmd; |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| uint32_t version_cmd = 0; |
| uint64_t version = 0; |
| uint32_t i; |
| for (i = 0; i < m_header.ncmds; ++i) { |
| const lldb::offset_t cmd_offset = offset; |
| if (m_data.GetU32(&offset, &load_cmd, 2) == nullptr) |
| break; |
| |
| if (load_cmd.cmd == LC_ID_DYLIB) { |
| if (version_cmd == 0) { |
| version_cmd = load_cmd.cmd; |
| if (m_data.GetU32(&offset, &load_cmd.dylib, 4) == nullptr) |
| break; |
| version = load_cmd.dylib.current_version; |
| } |
| break; // Break for now unless there is another more complete version |
| // number load command in the future. |
| } |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| |
| if (version_cmd == LC_ID_DYLIB) { |
| unsigned major = (version & 0xFFFF0000ull) >> 16; |
| unsigned minor = (version & 0x0000FF00ull) >> 8; |
| unsigned subminor = (version & 0x000000FFull); |
| return llvm::VersionTuple(major, minor, subminor); |
| } |
| } |
| return llvm::VersionTuple(); |
| } |
| |
| ArchSpec ObjectFileMachO::GetArchitecture() { |
| ModuleSP module_sp(GetModule()); |
| ArchSpec arch; |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| |
| return GetArchitecture(module_sp, m_header, m_data, |
| MachHeaderSizeFromMagic(m_header.magic)); |
| } |
| return arch; |
| } |
| |
| void ObjectFileMachO::GetProcessSharedCacheUUID(Process *process, |
| addr_t &base_addr, UUID &uuid) { |
| uuid.Clear(); |
| base_addr = LLDB_INVALID_ADDRESS; |
| if (process && process->GetDynamicLoader()) { |
| DynamicLoader *dl = process->GetDynamicLoader(); |
| LazyBool using_shared_cache; |
| LazyBool private_shared_cache; |
| dl->GetSharedCacheInformation(base_addr, uuid, using_shared_cache, |
| private_shared_cache); |
| } |
| Log *log(GetLog(LLDBLog::Symbols | LLDBLog::Process)); |
| LLDB_LOGF( |
| log, |
| "inferior process shared cache has a UUID of %s, base address 0x%" PRIx64, |
| uuid.GetAsString().c_str(), base_addr); |
| } |
| |
| // From dyld SPI header dyld_process_info.h |
| typedef void *dyld_process_info; |
| struct lldb_copy__dyld_process_cache_info { |
| uuid_t cacheUUID; // UUID of cache used by process |
| uint64_t cacheBaseAddress; // load address of dyld shared cache |
| bool noCache; // process is running without a dyld cache |
| bool privateCache; // process is using a private copy of its dyld cache |
| }; |
| |
| // #including mach/mach.h pulls in machine.h & CPU_TYPE_ARM etc conflicts with |
| // llvm enum definitions llvm::MachO::CPU_TYPE_ARM turning them into compile |
| // errors. So we need to use the actual underlying types of task_t and |
| // kern_return_t below. |
| extern "C" unsigned int /*task_t*/ mach_task_self(); |
| |
| void ObjectFileMachO::GetLLDBSharedCacheUUID(addr_t &base_addr, UUID &uuid) { |
| uuid.Clear(); |
| base_addr = LLDB_INVALID_ADDRESS; |
| |
| #if defined(__APPLE__) |
| uint8_t *(*dyld_get_all_image_infos)(void); |
| dyld_get_all_image_infos = |
| (uint8_t * (*)()) dlsym(RTLD_DEFAULT, "_dyld_get_all_image_infos"); |
| if (dyld_get_all_image_infos) { |
| uint8_t *dyld_all_image_infos_address = dyld_get_all_image_infos(); |
| if (dyld_all_image_infos_address) { |
| uint32_t *version = (uint32_t *) |
| dyld_all_image_infos_address; // version <mach-o/dyld_images.h> |
| if (*version >= 13) { |
| uuid_t *sharedCacheUUID_address = 0; |
| int wordsize = sizeof(uint8_t *); |
| if (wordsize == 8) { |
| sharedCacheUUID_address = |
| (uuid_t *)((uint8_t *)dyld_all_image_infos_address + |
| 160); // sharedCacheUUID <mach-o/dyld_images.h> |
| if (*version >= 15) |
| base_addr = |
| *(uint64_t |
| *)((uint8_t *)dyld_all_image_infos_address + |
| 176); // sharedCacheBaseAddress <mach-o/dyld_images.h> |
| } else { |
| sharedCacheUUID_address = |
| (uuid_t *)((uint8_t *)dyld_all_image_infos_address + |
| 84); // sharedCacheUUID <mach-o/dyld_images.h> |
| if (*version >= 15) { |
| base_addr = 0; |
| base_addr = |
| *(uint32_t |
| *)((uint8_t *)dyld_all_image_infos_address + |
| 100); // sharedCacheBaseAddress <mach-o/dyld_images.h> |
| } |
| } |
| uuid = UUID::fromOptionalData(sharedCacheUUID_address, sizeof(uuid_t)); |
| } |
| } |
| } else { |
| // Exists in macOS 10.12 and later, iOS 10.0 and later - dyld SPI |
| dyld_process_info (*dyld_process_info_create)( |
| unsigned int /* task_t */ task, uint64_t timestamp, |
| unsigned int /*kern_return_t*/ *kernelError); |
| void (*dyld_process_info_get_cache)(void *info, void *cacheInfo); |
| void (*dyld_process_info_release)(dyld_process_info info); |
| |
| dyld_process_info_create = (void *(*)(unsigned int /* task_t */, uint64_t, |
| unsigned int /*kern_return_t*/ *)) |
| dlsym(RTLD_DEFAULT, "_dyld_process_info_create"); |
| dyld_process_info_get_cache = (void (*)(void *, void *))dlsym( |
| RTLD_DEFAULT, "_dyld_process_info_get_cache"); |
| dyld_process_info_release = |
| (void (*)(void *))dlsym(RTLD_DEFAULT, "_dyld_process_info_release"); |
| |
| if (dyld_process_info_create && dyld_process_info_get_cache) { |
| unsigned int /*kern_return_t */ kern_ret; |
| dyld_process_info process_info = |
| dyld_process_info_create(::mach_task_self(), 0, &kern_ret); |
| if (process_info) { |
| struct lldb_copy__dyld_process_cache_info sc_info; |
| memset(&sc_info, 0, sizeof(struct lldb_copy__dyld_process_cache_info)); |
| dyld_process_info_get_cache(process_info, &sc_info); |
| if (sc_info.cacheBaseAddress != 0) { |
| base_addr = sc_info.cacheBaseAddress; |
| uuid = UUID::fromOptionalData(sc_info.cacheUUID, sizeof(uuid_t)); |
| } |
| dyld_process_info_release(process_info); |
| } |
| } |
| } |
| Log *log(GetLog(LLDBLog::Symbols | LLDBLog::Process)); |
| if (log && uuid.IsValid()) |
| LLDB_LOGF(log, |
| "lldb's in-memory shared cache has a UUID of %s base address of " |
| "0x%" PRIx64, |
| uuid.GetAsString().c_str(), base_addr); |
| #endif |
| } |
| |
| llvm::VersionTuple ObjectFileMachO::GetMinimumOSVersion() { |
| if (!m_min_os_version) { |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const lldb::offset_t load_cmd_offset = offset; |
| |
| llvm::MachO::version_min_command lc = {}; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == nullptr) |
| break; |
| if (lc.cmd == llvm::MachO::LC_VERSION_MIN_MACOSX || |
| lc.cmd == llvm::MachO::LC_VERSION_MIN_IPHONEOS || |
| lc.cmd == llvm::MachO::LC_VERSION_MIN_TVOS || |
| lc.cmd == llvm::MachO::LC_VERSION_MIN_WATCHOS) { |
| if (m_data.GetU32(&offset, &lc.version, |
| (sizeof(lc) / sizeof(uint32_t)) - 2)) { |
| const uint32_t xxxx = lc.version >> 16; |
| const uint32_t yy = (lc.version >> 8) & 0xffu; |
| const uint32_t zz = lc.version & 0xffu; |
| if (xxxx) { |
| m_min_os_version = llvm::VersionTuple(xxxx, yy, zz); |
| break; |
| } |
| } |
| } else if (lc.cmd == llvm::MachO::LC_BUILD_VERSION) { |
| // struct build_version_command { |
| // uint32_t cmd; /* LC_BUILD_VERSION */ |
| // uint32_t cmdsize; /* sizeof(struct |
| // build_version_command) plus */ |
| // /* ntools * sizeof(struct |
| // build_tool_version) */ |
| // uint32_t platform; /* platform */ |
| // uint32_t minos; /* X.Y.Z is encoded in nibbles |
| // xxxx.yy.zz */ uint32_t sdk; /* X.Y.Z is encoded in |
| // nibbles xxxx.yy.zz */ uint32_t ntools; /* number of |
| // tool entries following this */ |
| // }; |
| |
| offset += 4; // skip platform |
| uint32_t minos = m_data.GetU32(&offset); |
| |
| const uint32_t xxxx = minos >> 16; |
| const uint32_t yy = (minos >> 8) & 0xffu; |
| const uint32_t zz = minos & 0xffu; |
| if (xxxx) { |
| m_min_os_version = llvm::VersionTuple(xxxx, yy, zz); |
| break; |
| } |
| } |
| |
| offset = load_cmd_offset + lc.cmdsize; |
| } |
| |
| if (!m_min_os_version) { |
| // Set version to an empty value so we don't keep trying to |
| m_min_os_version = llvm::VersionTuple(); |
| } |
| } |
| |
| return *m_min_os_version; |
| } |
| |
| llvm::VersionTuple ObjectFileMachO::GetSDKVersion() { |
| if (!m_sdk_versions) { |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const lldb::offset_t load_cmd_offset = offset; |
| |
| llvm::MachO::version_min_command lc = {}; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == nullptr) |
| break; |
| if (lc.cmd == llvm::MachO::LC_VERSION_MIN_MACOSX || |
| lc.cmd == llvm::MachO::LC_VERSION_MIN_IPHONEOS || |
| lc.cmd == llvm::MachO::LC_VERSION_MIN_TVOS || |
| lc.cmd == llvm::MachO::LC_VERSION_MIN_WATCHOS) { |
| if (m_data.GetU32(&offset, &lc.version, |
| (sizeof(lc) / sizeof(uint32_t)) - 2)) { |
| const uint32_t xxxx = lc.sdk >> 16; |
| const uint32_t yy = (lc.sdk >> 8) & 0xffu; |
| const uint32_t zz = lc.sdk & 0xffu; |
| if (xxxx) { |
| m_sdk_versions = llvm::VersionTuple(xxxx, yy, zz); |
| break; |
| } else { |
| GetModule()->ReportWarning("minimum OS version load command with " |
| "invalid (0) version found."); |
| } |
| } |
| } |
| offset = load_cmd_offset + lc.cmdsize; |
| } |
| |
| if (!m_sdk_versions) { |
| offset = MachHeaderSizeFromMagic(m_header.magic); |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const lldb::offset_t load_cmd_offset = offset; |
| |
| llvm::MachO::version_min_command lc = {}; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == nullptr) |
| break; |
| if (lc.cmd == llvm::MachO::LC_BUILD_VERSION) { |
| // struct build_version_command { |
| // uint32_t cmd; /* LC_BUILD_VERSION */ |
| // uint32_t cmdsize; /* sizeof(struct |
| // build_version_command) plus */ |
| // /* ntools * sizeof(struct |
| // build_tool_version) */ |
| // uint32_t platform; /* platform */ |
| // uint32_t minos; /* X.Y.Z is encoded in nibbles |
| // xxxx.yy.zz */ uint32_t sdk; /* X.Y.Z is encoded |
| // in nibbles xxxx.yy.zz */ uint32_t ntools; /* number |
| // of tool entries following this */ |
| // }; |
| |
| offset += 4; // skip platform |
| uint32_t minos = m_data.GetU32(&offset); |
| |
| const uint32_t xxxx = minos >> 16; |
| const uint32_t yy = (minos >> 8) & 0xffu; |
| const uint32_t zz = minos & 0xffu; |
| if (xxxx) { |
| m_sdk_versions = llvm::VersionTuple(xxxx, yy, zz); |
| break; |
| } |
| } |
| offset = load_cmd_offset + lc.cmdsize; |
| } |
| } |
| |
| if (!m_sdk_versions) |
| m_sdk_versions = llvm::VersionTuple(); |
| } |
| |
| return *m_sdk_versions; |
| } |
| |
| bool ObjectFileMachO::GetIsDynamicLinkEditor() { |
| return m_header.filetype == llvm::MachO::MH_DYLINKER; |
| } |
| |
| bool ObjectFileMachO::AllowAssemblyEmulationUnwindPlans() { |
| return m_allow_assembly_emulation_unwind_plans; |
| } |
| |
| Section *ObjectFileMachO::GetMachHeaderSection() { |
| // Find the first address of the mach header which is the first non-zero file |
| // sized section whose file offset is zero. This is the base file address of |
| // the mach-o file which can be subtracted from the vmaddr of the other |
| // segments found in memory and added to the load address |
| ModuleSP module_sp = GetModule(); |
| if (!module_sp) |
| return nullptr; |
| SectionList *section_list = GetSectionList(); |
| if (!section_list) |
| return nullptr; |
| const size_t num_sections = section_list->GetSize(); |
| for (size_t sect_idx = 0; sect_idx < num_sections; ++sect_idx) { |
| Section *section = section_list->GetSectionAtIndex(sect_idx).get(); |
| if (section->GetFileOffset() == 0 && SectionIsLoadable(section)) |
| return section; |
| } |
| |
| // We may have a binary in the shared cache that has a non-zero |
| // file address for its first segment, traditionally the __TEXT segment. |
| // Search for it by name and return it as our next best guess. |
| SectionSP text_segment_sp = |
| GetSectionList()->FindSectionByName(GetSegmentNameTEXT()); |
| if (text_segment_sp.get() && SectionIsLoadable(text_segment_sp.get())) |
| return text_segment_sp.get(); |
| |
| return nullptr; |
| } |
| |
| bool ObjectFileMachO::SectionIsLoadable(const Section *section) { |
| if (!section) |
| return false; |
| const bool is_dsym = (m_header.filetype == MH_DSYM); |
| if (section->GetFileSize() == 0 && !is_dsym) |
| return false; |
| if (section->IsThreadSpecific()) |
| return false; |
| if (GetModule().get() != section->GetModule().get()) |
| return false; |
| // Be careful with __LINKEDIT and __DWARF segments |
| if (section->GetName() == GetSegmentNameLINKEDIT() || |
| section->GetName() == GetSegmentNameDWARF()) { |
| // Only map __LINKEDIT and __DWARF if we have an in memory image and |
| // this isn't a kernel binary like a kext or mach_kernel. |
| const bool is_memory_image = (bool)m_process_wp.lock(); |
| const Strata strata = GetStrata(); |
| if (is_memory_image == false || strata == eStrataKernel) |
| return false; |
| } |
| return true; |
| } |
| |
| lldb::addr_t ObjectFileMachO::CalculateSectionLoadAddressForMemoryImage( |
| lldb::addr_t header_load_address, const Section *header_section, |
| const Section *section) { |
| ModuleSP module_sp = GetModule(); |
| if (module_sp && header_section && section && |
| header_load_address != LLDB_INVALID_ADDRESS) { |
| lldb::addr_t file_addr = header_section->GetFileAddress(); |
| if (file_addr != LLDB_INVALID_ADDRESS && SectionIsLoadable(section)) |
| return section->GetFileAddress() - file_addr + header_load_address; |
| } |
| return LLDB_INVALID_ADDRESS; |
| } |
| |
| bool ObjectFileMachO::SetLoadAddress(Target &target, lldb::addr_t value, |
| bool value_is_offset) { |
| ModuleSP module_sp = GetModule(); |
| if (!module_sp) |
| return false; |
| |
| SectionList *section_list = GetSectionList(); |
| if (!section_list) |
| return false; |
| |
| size_t num_loaded_sections = 0; |
| const size_t num_sections = section_list->GetSize(); |
| |
| if (value_is_offset) { |
| // "value" is an offset to apply to each top level segment |
| for (size_t sect_idx = 0; sect_idx < num_sections; ++sect_idx) { |
| // Iterate through the object file sections to find all of the |
| // sections that size on disk (to avoid __PAGEZERO) and load them |
| SectionSP section_sp(section_list->GetSectionAtIndex(sect_idx)); |
| if (SectionIsLoadable(section_sp.get())) |
| if (target.GetSectionLoadList().SetSectionLoadAddress( |
| section_sp, section_sp->GetFileAddress() + value)) |
| ++num_loaded_sections; |
| } |
| } else { |
| // "value" is the new base address of the mach_header, adjust each |
| // section accordingly |
| |
| Section *mach_header_section = GetMachHeaderSection(); |
| if (mach_header_section) { |
| for (size_t sect_idx = 0; sect_idx < num_sections; ++sect_idx) { |
| SectionSP section_sp(section_list->GetSectionAtIndex(sect_idx)); |
| |
| lldb::addr_t section_load_addr = |
| CalculateSectionLoadAddressForMemoryImage( |
| value, mach_header_section, section_sp.get()); |
| if (section_load_addr != LLDB_INVALID_ADDRESS) { |
| if (target.GetSectionLoadList().SetSectionLoadAddress( |
| section_sp, section_load_addr)) |
| ++num_loaded_sections; |
| } |
| } |
| } |
| } |
| return num_loaded_sections > 0; |
| } |
| |
| struct all_image_infos_header { |
| uint32_t version; // currently 1 |
| uint32_t imgcount; // number of binary images |
| uint64_t entries_fileoff; // file offset in the corefile of where the array of |
| // struct entry's begin. |
| uint32_t entries_size; // size of 'struct entry'. |
| uint32_t unused; |
| }; |
| |
| struct image_entry { |
| uint64_t filepath_offset; // offset in corefile to c-string of the file path, |
| // UINT64_MAX if unavailable. |
| uuid_t uuid; // uint8_t[16]. should be set to all zeroes if |
| // uuid is unknown. |
| uint64_t load_address; // UINT64_MAX if unknown. |
| uint64_t seg_addrs_offset; // offset to the array of struct segment_vmaddr's. |
| uint32_t segment_count; // The number of segments for this binary. |
| uint32_t unused; |
| |
| image_entry() { |
| filepath_offset = UINT64_MAX; |
| memset(&uuid, 0, sizeof(uuid_t)); |
| segment_count = 0; |
| load_address = UINT64_MAX; |
| seg_addrs_offset = UINT64_MAX; |
| unused = 0; |
| } |
| image_entry(const image_entry &rhs) { |
| filepath_offset = rhs.filepath_offset; |
| memcpy(&uuid, &rhs.uuid, sizeof(uuid_t)); |
| segment_count = rhs.segment_count; |
| seg_addrs_offset = rhs.seg_addrs_offset; |
| load_address = rhs.load_address; |
| unused = rhs.unused; |
| } |
| }; |
| |
| struct segment_vmaddr { |
| char segname[16]; |
| uint64_t vmaddr; |
| uint64_t unused; |
| |
| segment_vmaddr() { |
| memset(&segname, 0, 16); |
| vmaddr = UINT64_MAX; |
| unused = 0; |
| } |
| segment_vmaddr(const segment_vmaddr &rhs) { |
| memcpy(&segname, &rhs.segname, 16); |
| vmaddr = rhs.vmaddr; |
| unused = rhs.unused; |
| } |
| }; |
| |
| // Write the payload for the "all image infos" LC_NOTE into |
| // the supplied all_image_infos_payload, assuming that this |
| // will be written into the corefile starting at |
| // initial_file_offset. |
| // |
| // The placement of this payload is a little tricky. We're |
| // laying this out as |
| // |
| // 1. header (struct all_image_info_header) |
| // 2. Array of fixed-size (struct image_entry)'s, one |
| // per binary image present in the process. |
| // 3. Arrays of (struct segment_vmaddr)'s, a varying number |
| // for each binary image. |
| // 4. Variable length c-strings of binary image filepaths, |
| // one per binary. |
| // |
| // To compute where everything will be laid out in the |
| // payload, we need to iterate over the images and calculate |
| // how many segment_vmaddr structures each image will need, |
| // and how long each image's filepath c-string is. There |
| // are some multiple passes over the image list while calculating |
| // everything. |
| |
| static offset_t CreateAllImageInfosPayload( |
| const lldb::ProcessSP &process_sp, offset_t initial_file_offset, |
| StreamString &all_image_infos_payload, SaveCoreStyle core_style) { |
| Target &target = process_sp->GetTarget(); |
| ModuleList modules = target.GetImages(); |
| |
| // stack-only corefiles have no reason to include binaries that |
| // are not executing; we're trying to make the smallest corefile |
| // we can, so leave the rest out. |
| if (core_style == SaveCoreStyle::eSaveCoreStackOnly) |
| modules.Clear(); |
| |
| std::set<std::string> executing_uuids; |
| ThreadList &thread_list(process_sp->GetThreadList()); |
| for (uint32_t i = 0; i < thread_list.GetSize(); i++) { |
| ThreadSP thread_sp = thread_list.GetThreadAtIndex(i); |
| uint32_t stack_frame_count = thread_sp->GetStackFrameCount(); |
| for (uint32_t j = 0; j < stack_frame_count; j++) { |
| StackFrameSP stack_frame_sp = thread_sp->GetStackFrameAtIndex(j); |
| Address pc = stack_frame_sp->GetFrameCodeAddress(); |
| ModuleSP module_sp = pc.GetModule(); |
| if (module_sp) { |
| UUID uuid = module_sp->GetUUID(); |
| if (uuid.IsValid()) { |
| executing_uuids.insert(uuid.GetAsString()); |
| modules.AppendIfNeeded(module_sp); |
| } |
| } |
| } |
| } |
| size_t modules_count = modules.GetSize(); |
| |
| struct all_image_infos_header infos; |
| infos.version = 1; |
| infos.imgcount = modules_count; |
| infos.entries_size = sizeof(image_entry); |
| infos.entries_fileoff = initial_file_offset + sizeof(all_image_infos_header); |
| infos.unused = 0; |
| |
| all_image_infos_payload.PutHex32(infos.version); |
| all_image_infos_payload.PutHex32(infos.imgcount); |
| all_image_infos_payload.PutHex64(infos.entries_fileoff); |
| all_image_infos_payload.PutHex32(infos.entries_size); |
| all_image_infos_payload.PutHex32(infos.unused); |
| |
| // First create the structures for all of the segment name+vmaddr vectors |
| // for each module, so we will know the size of them as we add the |
| // module entries. |
| std::vector<std::vector<segment_vmaddr>> modules_segment_vmaddrs; |
| for (size_t i = 0; i < modules_count; i++) { |
| ModuleSP module = modules.GetModuleAtIndex(i); |
| |
| SectionList *sections = module->GetSectionList(); |
| size_t sections_count = sections->GetSize(); |
| std::vector<segment_vmaddr> segment_vmaddrs; |
| for (size_t j = 0; j < sections_count; j++) { |
| SectionSP section = sections->GetSectionAtIndex(j); |
| if (!section->GetParent().get()) { |
| addr_t vmaddr = section->GetLoadBaseAddress(&target); |
| if (vmaddr == LLDB_INVALID_ADDRESS) |
| continue; |
| ConstString name = section->GetName(); |
| segment_vmaddr seg_vmaddr; |
| strncpy(seg_vmaddr.segname, name.AsCString(), |
| sizeof(seg_vmaddr.segname)); |
| seg_vmaddr.vmaddr = vmaddr; |
| seg_vmaddr.unused = 0; |
| segment_vmaddrs.push_back(seg_vmaddr); |
| } |
| } |
| modules_segment_vmaddrs.push_back(segment_vmaddrs); |
| } |
| |
| offset_t size_of_vmaddr_structs = 0; |
| for (size_t i = 0; i < modules_segment_vmaddrs.size(); i++) { |
| size_of_vmaddr_structs += |
| modules_segment_vmaddrs[i].size() * sizeof(segment_vmaddr); |
| } |
| |
| offset_t size_of_filepath_cstrings = 0; |
| for (size_t i = 0; i < modules_count; i++) { |
| ModuleSP module_sp = modules.GetModuleAtIndex(i); |
| size_of_filepath_cstrings += module_sp->GetFileSpec().GetPath().size() + 1; |
| } |
| |
| // Calculate the file offsets of our "all image infos" payload in the |
| // corefile. initial_file_offset the original value passed in to this method. |
| |
| offset_t start_of_entries = |
| initial_file_offset + sizeof(all_image_infos_header); |
| offset_t start_of_seg_vmaddrs = |
| start_of_entries + sizeof(image_entry) * modules_count; |
| offset_t start_of_filenames = start_of_seg_vmaddrs + size_of_vmaddr_structs; |
| |
| offset_t final_file_offset = start_of_filenames + size_of_filepath_cstrings; |
| |
| // Now write the one-per-module 'struct image_entry' into the |
| // StringStream; keep track of where the struct segment_vmaddr |
| // entries for each module will end up in the corefile. |
| |
| offset_t current_string_offset = start_of_filenames; |
| offset_t current_segaddrs_offset = start_of_seg_vmaddrs; |
| std::vector<struct image_entry> image_entries; |
| for (size_t i = 0; i < modules_count; i++) { |
| ModuleSP module_sp = modules.GetModuleAtIndex(i); |
| |
| struct image_entry ent; |
| memcpy(&ent.uuid, module_sp->GetUUID().GetBytes().data(), sizeof(ent.uuid)); |
| if (modules_segment_vmaddrs[i].size() > 0) { |
| ent.segment_count = modules_segment_vmaddrs[i].size(); |
| ent.seg_addrs_offset = current_segaddrs_offset; |
| } |
| ent.filepath_offset = current_string_offset; |
| ObjectFile *objfile = module_sp->GetObjectFile(); |
| if (objfile) { |
| Address base_addr(objfile->GetBaseAddress()); |
| if (base_addr.IsValid()) { |
| ent.load_address = base_addr.GetLoadAddress(&target); |
| } |
| } |
| |
| all_image_infos_payload.PutHex64(ent.filepath_offset); |
| all_image_infos_payload.PutRawBytes(ent.uuid, sizeof(ent.uuid)); |
| all_image_infos_payload.PutHex64(ent.load_address); |
| all_image_infos_payload.PutHex64(ent.seg_addrs_offset); |
| all_image_infos_payload.PutHex32(ent.segment_count); |
| |
| if (executing_uuids.find(module_sp->GetUUID().GetAsString()) != |
| executing_uuids.end()) |
| all_image_infos_payload.PutHex32(1); |
| else |
| all_image_infos_payload.PutHex32(0); |
| |
| current_segaddrs_offset += ent.segment_count * sizeof(segment_vmaddr); |
| current_string_offset += module_sp->GetFileSpec().GetPath().size() + 1; |
| } |
| |
| // Now write the struct segment_vmaddr entries into the StringStream. |
| |
| for (size_t i = 0; i < modules_segment_vmaddrs.size(); i++) { |
| if (modules_segment_vmaddrs[i].size() == 0) |
| continue; |
| for (struct segment_vmaddr segvm : modules_segment_vmaddrs[i]) { |
| all_image_infos_payload.PutRawBytes(segvm.segname, sizeof(segvm.segname)); |
| all_image_infos_payload.PutHex64(segvm.vmaddr); |
| all_image_infos_payload.PutHex64(segvm.unused); |
| } |
| } |
| |
| for (size_t i = 0; i < modules_count; i++) { |
| ModuleSP module_sp = modules.GetModuleAtIndex(i); |
| std::string filepath = module_sp->GetFileSpec().GetPath(); |
| all_image_infos_payload.PutRawBytes(filepath.data(), filepath.size() + 1); |
| } |
| |
| return final_file_offset; |
| } |
| |
| // Temp struct used to combine contiguous memory regions with |
| // identical permissions. |
| struct page_object { |
| addr_t addr; |
| addr_t size; |
| uint32_t prot; |
| }; |
| |
| bool ObjectFileMachO::SaveCore(const lldb::ProcessSP &process_sp, |
| const FileSpec &outfile, |
| lldb::SaveCoreStyle &core_style, Status &error) { |
| if (!process_sp) |
| return false; |
| |
| // Default on macOS is to create a dirty-memory-only corefile. |
| if (core_style == SaveCoreStyle::eSaveCoreUnspecified) { |
| core_style = SaveCoreStyle::eSaveCoreDirtyOnly; |
| } |
| |
| Target &target = process_sp->GetTarget(); |
| const ArchSpec target_arch = target.GetArchitecture(); |
| const llvm::Triple &target_triple = target_arch.GetTriple(); |
| if (target_triple.getVendor() == llvm::Triple::Apple && |
| (target_triple.getOS() == llvm::Triple::MacOSX || |
| target_triple.getOS() == llvm::Triple::IOS || |
| target_triple.getOS() == llvm::Triple::WatchOS || |
| target_triple.getOS() == llvm::Triple::TvOS)) { |
| // NEED_BRIDGEOS_TRIPLE target_triple.getOS() == llvm::Triple::BridgeOS)) |
| // { |
| bool make_core = false; |
| switch (target_arch.GetMachine()) { |
| case llvm::Triple::aarch64: |
| case llvm::Triple::aarch64_32: |
| case llvm::Triple::arm: |
| case llvm::Triple::thumb: |
| case llvm::Triple::x86: |
| case llvm::Triple::x86_64: |
| make_core = true; |
| break; |
| default: |
| error.SetErrorStringWithFormat("unsupported core architecture: %s", |
| target_triple.str().c_str()); |
| break; |
| } |
| |
| if (make_core) { |
| std::vector<llvm::MachO::segment_command_64> segment_load_commands; |
| // uint32_t range_info_idx = 0; |
| MemoryRegionInfo range_info; |
| Status range_error = process_sp->GetMemoryRegionInfo(0, range_info); |
| const uint32_t addr_byte_size = target_arch.GetAddressByteSize(); |
| const ByteOrder byte_order = target_arch.GetByteOrder(); |
| std::vector<page_object> pages_to_copy; |
| |
| if (range_error.Success()) { |
| while (range_info.GetRange().GetRangeBase() != LLDB_INVALID_ADDRESS) { |
| // Calculate correct protections |
| uint32_t prot = 0; |
| if (range_info.GetReadable() == MemoryRegionInfo::eYes) |
| prot |= VM_PROT_READ; |
| if (range_info.GetWritable() == MemoryRegionInfo::eYes) |
| prot |= VM_PROT_WRITE; |
| if (range_info.GetExecutable() == MemoryRegionInfo::eYes) |
| prot |= VM_PROT_EXECUTE; |
| |
| const addr_t addr = range_info.GetRange().GetRangeBase(); |
| const addr_t size = range_info.GetRange().GetByteSize(); |
| |
| if (size == 0) |
| break; |
| |
| bool include_this_region = true; |
| bool dirty_pages_only = false; |
| if (core_style == SaveCoreStyle::eSaveCoreStackOnly) { |
| dirty_pages_only = true; |
| if (range_info.IsStackMemory() != MemoryRegionInfo::eYes) { |
| include_this_region = false; |
| } |
| } |
| if (core_style == SaveCoreStyle::eSaveCoreDirtyOnly) { |
| dirty_pages_only = true; |
| } |
| |
| if (prot != 0 && include_this_region) { |
| addr_t pagesize = range_info.GetPageSize(); |
| const llvm::Optional<std::vector<addr_t>> &dirty_page_list = |
| range_info.GetDirtyPageList(); |
| if (dirty_pages_only && dirty_page_list) { |
| for (addr_t dirtypage : dirty_page_list.value()) { |
| page_object obj; |
| obj.addr = dirtypage; |
| obj.size = pagesize; |
| obj.prot = prot; |
| pages_to_copy.push_back(obj); |
| } |
| } else { |
| page_object obj; |
| obj.addr = addr; |
| obj.size = size; |
| obj.prot = prot; |
| pages_to_copy.push_back(obj); |
| } |
| } |
| |
| range_error = process_sp->GetMemoryRegionInfo( |
| range_info.GetRange().GetRangeEnd(), range_info); |
| if (range_error.Fail()) |
| break; |
| } |
| |
| // Combine contiguous entries that have the same |
| // protections so we don't have an excess of |
| // load commands. |
| std::vector<page_object> combined_page_objects; |
| page_object last_obj; |
| last_obj.addr = LLDB_INVALID_ADDRESS; |
| last_obj.size = 0; |
| for (page_object obj : pages_to_copy) { |
| if (last_obj.addr == LLDB_INVALID_ADDRESS) { |
| last_obj = obj; |
| continue; |
| } |
| if (last_obj.addr + last_obj.size == obj.addr && |
| last_obj.prot == obj.prot) { |
| last_obj.size += obj.size; |
| continue; |
| } |
| combined_page_objects.push_back(last_obj); |
| last_obj = obj; |
| } |
| // Add the last entry we were looking to combine |
| // on to the array. |
| if (last_obj.addr != LLDB_INVALID_ADDRESS && last_obj.size != 0) |
| combined_page_objects.push_back(last_obj); |
| |
| for (page_object obj : combined_page_objects) { |
| uint32_t cmd_type = LC_SEGMENT_64; |
| uint32_t segment_size = sizeof(llvm::MachO::segment_command_64); |
| if (addr_byte_size == 4) { |
| cmd_type = LC_SEGMENT; |
| segment_size = sizeof(llvm::MachO::segment_command); |
| } |
| llvm::MachO::segment_command_64 segment = { |
| cmd_type, // uint32_t cmd; |
| segment_size, // uint32_t cmdsize; |
| {0}, // char segname[16]; |
| obj.addr, // uint64_t vmaddr; // uint32_t for 32-bit |
| // Mach-O |
| obj.size, // uint64_t vmsize; // uint32_t for 32-bit |
| // Mach-O |
| 0, // uint64_t fileoff; // uint32_t for 32-bit Mach-O |
| obj.size, // uint64_t filesize; // uint32_t for 32-bit |
| // Mach-O |
| obj.prot, // uint32_t maxprot; |
| obj.prot, // uint32_t initprot; |
| 0, // uint32_t nsects; |
| 0}; // uint32_t flags; |
| segment_load_commands.push_back(segment); |
| } |
| |
| StreamString buffer(Stream::eBinary, addr_byte_size, byte_order); |
| |
| llvm::MachO::mach_header_64 mach_header; |
| if (addr_byte_size == 8) { |
| mach_header.magic = MH_MAGIC_64; |
| } else { |
| mach_header.magic = MH_MAGIC; |
| } |
| mach_header.cputype = target_arch.GetMachOCPUType(); |
| mach_header.cpusubtype = target_arch.GetMachOCPUSubType(); |
| mach_header.filetype = MH_CORE; |
| mach_header.ncmds = segment_load_commands.size(); |
| mach_header.flags = 0; |
| mach_header.reserved = 0; |
| ThreadList &thread_list = process_sp->GetThreadList(); |
| const uint32_t num_threads = thread_list.GetSize(); |
| |
| // Make an array of LC_THREAD data items. Each one contains the |
| // contents of the LC_THREAD load command. The data doesn't contain |
| // the load command + load command size, we will add the load command |
| // and load command size as we emit the data. |
| std::vector<StreamString> LC_THREAD_datas(num_threads); |
| for (auto &LC_THREAD_data : LC_THREAD_datas) { |
| LC_THREAD_data.GetFlags().Set(Stream::eBinary); |
| LC_THREAD_data.SetAddressByteSize(addr_byte_size); |
| LC_THREAD_data.SetByteOrder(byte_order); |
| } |
| for (uint32_t thread_idx = 0; thread_idx < num_threads; ++thread_idx) { |
| ThreadSP thread_sp(thread_list.GetThreadAtIndex(thread_idx)); |
| if (thread_sp) { |
| switch (mach_header.cputype) { |
| case llvm::MachO::CPU_TYPE_ARM64: |
| case llvm::MachO::CPU_TYPE_ARM64_32: |
| RegisterContextDarwin_arm64_Mach::Create_LC_THREAD( |
| thread_sp.get(), LC_THREAD_datas[thread_idx]); |
| break; |
| |
| case llvm::MachO::CPU_TYPE_ARM: |
| RegisterContextDarwin_arm_Mach::Create_LC_THREAD( |
| thread_sp.get(), LC_THREAD_datas[thread_idx]); |
| break; |
| |
| case llvm::MachO::CPU_TYPE_I386: |
| RegisterContextDarwin_i386_Mach::Create_LC_THREAD( |
| thread_sp.get(), LC_THREAD_datas[thread_idx]); |
| break; |
| |
| case llvm::MachO::CPU_TYPE_X86_64: |
| RegisterContextDarwin_x86_64_Mach::Create_LC_THREAD( |
| thread_sp.get(), LC_THREAD_datas[thread_idx]); |
| break; |
| } |
| } |
| } |
| |
| // The size of the load command is the size of the segments... |
| if (addr_byte_size == 8) { |
| mach_header.sizeofcmds = segment_load_commands.size() * |
| sizeof(llvm::MachO::segment_command_64); |
| } else { |
| mach_header.sizeofcmds = segment_load_commands.size() * |
| sizeof(llvm::MachO::segment_command); |
| } |
| |
| // and the size of all LC_THREAD load command |
| for (const auto &LC_THREAD_data : LC_THREAD_datas) { |
| ++mach_header.ncmds; |
| mach_header.sizeofcmds += 8 + LC_THREAD_data.GetSize(); |
| } |
| |
| // Bits will be set to indicate which bits are NOT used in |
| // addressing in this process or 0 for unknown. |
| uint64_t address_mask = process_sp->GetCodeAddressMask(); |
| if (address_mask != 0) { |
| // LC_NOTE "addrable bits" |
| mach_header.ncmds++; |
| mach_header.sizeofcmds += sizeof(llvm::MachO::note_command); |
| } |
| |
| // LC_NOTE "all image infos" |
| mach_header.ncmds++; |
| mach_header.sizeofcmds += sizeof(llvm::MachO::note_command); |
| |
| // Write the mach header |
| buffer.PutHex32(mach_header.magic); |
| buffer.PutHex32(mach_header.cputype); |
| buffer.PutHex32(mach_header.cpusubtype); |
| buffer.PutHex32(mach_header.filetype); |
| buffer.PutHex32(mach_header.ncmds); |
| buffer.PutHex32(mach_header.sizeofcmds); |
| buffer.PutHex32(mach_header.flags); |
| if (addr_byte_size == 8) { |
| buffer.PutHex32(mach_header.reserved); |
| } |
| |
| // Skip the mach header and all load commands and align to the next |
| // 0x1000 byte boundary |
| addr_t file_offset = buffer.GetSize() + mach_header.sizeofcmds; |
| |
| file_offset = llvm::alignTo(file_offset, 16); |
| std::vector<std::unique_ptr<LCNoteEntry>> lc_notes; |
| |
| // Add "addrable bits" LC_NOTE when an address mask is available |
| if (address_mask != 0) { |
| std::unique_ptr<LCNoteEntry> addrable_bits_lcnote_up( |
| new LCNoteEntry(addr_byte_size, byte_order)); |
| addrable_bits_lcnote_up->name = "addrable bits"; |
| addrable_bits_lcnote_up->payload_file_offset = file_offset; |
| int bits = std::bitset<64>(~address_mask).count(); |
| addrable_bits_lcnote_up->payload.PutHex32(3); // version |
| addrable_bits_lcnote_up->payload.PutHex32( |
| bits); // # of bits used for addressing |
| addrable_bits_lcnote_up->payload.PutHex64(0); // unused |
| |
| file_offset += addrable_bits_lcnote_up->payload.GetSize(); |
| |
| lc_notes.push_back(std::move(addrable_bits_lcnote_up)); |
| } |
| |
| // Add "all image infos" LC_NOTE |
| std::unique_ptr<LCNoteEntry> all_image_infos_lcnote_up( |
| new LCNoteEntry(addr_byte_size, byte_order)); |
| all_image_infos_lcnote_up->name = "all image infos"; |
| all_image_infos_lcnote_up->payload_file_offset = file_offset; |
| file_offset = CreateAllImageInfosPayload( |
| process_sp, file_offset, all_image_infos_lcnote_up->payload, |
| core_style); |
| lc_notes.push_back(std::move(all_image_infos_lcnote_up)); |
| |
| // Add LC_NOTE load commands |
| for (auto &lcnote : lc_notes) { |
| // Add the LC_NOTE load command to the file. |
| buffer.PutHex32(LC_NOTE); |
| buffer.PutHex32(sizeof(llvm::MachO::note_command)); |
| char namebuf[16]; |
| memset(namebuf, 0, sizeof(namebuf)); |
| // this is the uncommon case where strncpy is exactly |
| // the right one, doesn't need to be nul terminated. |
| strncpy(namebuf, lcnote->name.c_str(), sizeof(namebuf)); |
| buffer.PutRawBytes(namebuf, sizeof(namebuf)); |
| buffer.PutHex64(lcnote->payload_file_offset); |
| buffer.PutHex64(lcnote->payload.GetSize()); |
| } |
| |
| // Align to 4096-byte page boundary for the LC_SEGMENTs. |
| file_offset = llvm::alignTo(file_offset, 4096); |
| |
| for (auto &segment : segment_load_commands) { |
| segment.fileoff = file_offset; |
| file_offset += segment.filesize; |
| } |
| |
| // Write out all of the LC_THREAD load commands |
| for (const auto &LC_THREAD_data : LC_THREAD_datas) { |
| const size_t LC_THREAD_data_size = LC_THREAD_data.GetSize(); |
| buffer.PutHex32(LC_THREAD); |
| buffer.PutHex32(8 + LC_THREAD_data_size); // cmd + cmdsize + data |
| buffer.Write(LC_THREAD_data.GetString().data(), LC_THREAD_data_size); |
| } |
| |
| // Write out all of the segment load commands |
| for (const auto &segment : segment_load_commands) { |
| buffer.PutHex32(segment.cmd); |
| buffer.PutHex32(segment.cmdsize); |
| buffer.PutRawBytes(segment.segname, sizeof(segment.segname)); |
| if (addr_byte_size == 8) { |
| buffer.PutHex64(segment.vmaddr); |
| buffer.PutHex64(segment.vmsize); |
| buffer.PutHex64(segment.fileoff); |
| buffer.PutHex64(segment.filesize); |
| } else { |
| buffer.PutHex32(static_cast<uint32_t>(segment.vmaddr)); |
| buffer.PutHex32(static_cast<uint32_t>(segment.vmsize)); |
| buffer.PutHex32(static_cast<uint32_t>(segment.fileoff)); |
| buffer.PutHex32(static_cast<uint32_t>(segment.filesize)); |
| } |
| buffer.PutHex32(segment.maxprot); |
| buffer.PutHex32(segment.initprot); |
| buffer.PutHex32(segment.nsects); |
| buffer.PutHex32(segment.flags); |
| } |
| |
| std::string core_file_path(outfile.GetPath()); |
| auto core_file = FileSystem::Instance().Open( |
| outfile, File::eOpenOptionWriteOnly | File::eOpenOptionTruncate | |
| File::eOpenOptionCanCreate); |
| if (!core_file) { |
| error = core_file.takeError(); |
| } else { |
| // Read 1 page at a time |
| uint8_t bytes[0x1000]; |
| // Write the mach header and load commands out to the core file |
| size_t bytes_written = buffer.GetString().size(); |
| error = |
| core_file.get()->Write(buffer.GetString().data(), bytes_written); |
| if (error.Success()) { |
| |
| for (auto &lcnote : lc_notes) { |
| if (core_file.get()->SeekFromStart(lcnote->payload_file_offset) == |
| -1) { |
| error.SetErrorStringWithFormat("Unable to seek to corefile pos " |
| "to write '%s' LC_NOTE payload", |
| lcnote->name.c_str()); |
| return false; |
| } |
| bytes_written = lcnote->payload.GetSize(); |
| error = core_file.get()->Write(lcnote->payload.GetData(), |
| bytes_written); |
| if (!error.Success()) |
| return false; |
| } |
| |
| // Now write the file data for all memory segments in the process |
| for (const auto &segment : segment_load_commands) { |
| if (core_file.get()->SeekFromStart(segment.fileoff) == -1) { |
| error.SetErrorStringWithFormat( |
| "unable to seek to offset 0x%" PRIx64 " in '%s'", |
| segment.fileoff, core_file_path.c_str()); |
| break; |
| } |
| |
| target.GetDebugger().GetAsyncOutputStream()->Printf( |
| "Saving %" PRId64 |
| " bytes of data for memory region at 0x%" PRIx64 "\n", |
| segment.vmsize, segment.vmaddr); |
| addr_t bytes_left = segment.vmsize; |
| addr_t addr = segment.vmaddr; |
| Status memory_read_error; |
| while (bytes_left > 0 && error.Success()) { |
| const size_t bytes_to_read = |
| bytes_left > sizeof(bytes) ? sizeof(bytes) : bytes_left; |
| |
| // In a savecore setting, we don't really care about caching, |
| // as the data is dumped and very likely never read again, |
| // so we call ReadMemoryFromInferior to bypass it. |
| const size_t bytes_read = process_sp->ReadMemoryFromInferior( |
| addr, bytes, bytes_to_read, memory_read_error); |
| |
| if (bytes_read == bytes_to_read) { |
| size_t bytes_written = bytes_read; |
| error = core_file.get()->Write(bytes, bytes_written); |
| bytes_left -= bytes_read; |
| addr += bytes_read; |
| } else { |
| // Some pages within regions are not readable, those should |
| // be zero filled |
| memset(bytes, 0, bytes_to_read); |
| size_t bytes_written = bytes_to_read; |
| error = core_file.get()->Write(bytes, bytes_written); |
| bytes_left -= bytes_to_read; |
| addr += bytes_to_read; |
| } |
| } |
| } |
| } |
| } |
| } else { |
| error.SetErrorString( |
| "process doesn't support getting memory region info"); |
| } |
| } |
| return true; // This is the right plug to handle saving core files for |
| // this process |
| } |
| return false; |
| } |
| |
| ObjectFileMachO::MachOCorefileAllImageInfos |
| ObjectFileMachO::GetCorefileAllImageInfos() { |
| MachOCorefileAllImageInfos image_infos; |
| |
| // Look for an "all image infos" LC_NOTE. |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const uint32_t cmd_offset = offset; |
| llvm::MachO::load_command lc = {}; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == nullptr) |
| break; |
| if (lc.cmd == LC_NOTE) { |
| char data_owner[17]; |
| m_data.CopyData(offset, 16, data_owner); |
| data_owner[16] = '\0'; |
| offset += 16; |
| uint64_t fileoff = m_data.GetU64_unchecked(&offset); |
| offset += 4; /* size unused */ |
| |
| if (strcmp("all image infos", data_owner) == 0) { |
| offset = fileoff; |
| // Read the struct all_image_infos_header. |
| uint32_t version = m_data.GetU32(&offset); |
| if (version != 1) { |
| return image_infos; |
| } |
| uint32_t imgcount = m_data.GetU32(&offset); |
| uint64_t entries_fileoff = m_data.GetU64(&offset); |
| offset += 4; // uint32_t entries_size; |
| offset += 4; // uint32_t unused; |
| |
| offset = entries_fileoff; |
| for (uint32_t i = 0; i < imgcount; i++) { |
| // Read the struct image_entry. |
| offset_t filepath_offset = m_data.GetU64(&offset); |
| uuid_t uuid; |
| memcpy(&uuid, m_data.GetData(&offset, sizeof(uuid_t)), |
| sizeof(uuid_t)); |
| uint64_t load_address = m_data.GetU64(&offset); |
| offset_t seg_addrs_offset = m_data.GetU64(&offset); |
| uint32_t segment_count = m_data.GetU32(&offset); |
| uint32_t currently_executing = m_data.GetU32(&offset); |
| |
| MachOCorefileImageEntry image_entry; |
| image_entry.filename = (const char *)m_data.GetCStr(&filepath_offset); |
| if (!uuid_is_null(uuid)) |
| image_entry.uuid = UUID::fromData(uuid, sizeof(uuid_t)); |
| image_entry.load_address = load_address; |
| image_entry.currently_executing = currently_executing; |
| |
| offset_t seg_vmaddrs_offset = seg_addrs_offset; |
| for (uint32_t j = 0; j < segment_count; j++) { |
| char segname[17]; |
| m_data.CopyData(seg_vmaddrs_offset, 16, segname); |
| segname[16] = '\0'; |
| seg_vmaddrs_offset += 16; |
| uint64_t vmaddr = m_data.GetU64(&seg_vmaddrs_offset); |
| seg_vmaddrs_offset += 8; /* unused */ |
| |
| std::tuple<ConstString, addr_t> new_seg{ConstString(segname), |
| vmaddr}; |
| image_entry.segment_load_addresses.push_back(new_seg); |
| } |
| image_infos.all_image_infos.push_back(image_entry); |
| } |
| } else if (strcmp("load binary", data_owner) == 0) { |
| uint32_t version = m_data.GetU32(&fileoff); |
| if (version == 1) { |
| uuid_t uuid; |
| memcpy(&uuid, m_data.GetData(&fileoff, sizeof(uuid_t)), |
| sizeof(uuid_t)); |
| uint64_t load_address = m_data.GetU64(&fileoff); |
| uint64_t slide = m_data.GetU64(&fileoff); |
| std::string filename = m_data.GetCStr(&fileoff); |
| |
| MachOCorefileImageEntry image_entry; |
| image_entry.filename = filename; |
| if (!uuid_is_null(uuid)) |
| image_entry.uuid = UUID::fromData(uuid, sizeof(uuid_t)); |
| image_entry.load_address = load_address; |
| image_entry.slide = slide; |
| image_entry.currently_executing = true; |
| image_infos.all_image_infos.push_back(image_entry); |
| } |
| } |
| } |
| offset = cmd_offset + lc.cmdsize; |
| } |
| |
| return image_infos; |
| } |
| |
| bool ObjectFileMachO::LoadCoreFileImages(lldb_private::Process &process) { |
| MachOCorefileAllImageInfos image_infos = GetCorefileAllImageInfos(); |
| Log *log = GetLog(LLDBLog::DynamicLoader); |
| |
| ModuleList added_modules; |
| for (const MachOCorefileImageEntry &image : image_infos.all_image_infos) { |
| ModuleSP module_sp; |
| |
| if (!image.filename.empty()) { |
| Status error; |
| ModuleSpec module_spec; |
| module_spec.GetUUID() = image.uuid; |
| module_spec.GetFileSpec() = FileSpec(image.filename.c_str()); |
| if (image.currently_executing) { |
| Symbols::DownloadObjectAndSymbolFile(module_spec, error, true); |
| if (FileSystem::Instance().Exists(module_spec.GetFileSpec())) { |
| process.GetTarget().GetOrCreateModule(module_spec, false); |
| } |
| } |
| module_sp = |
| process.GetTarget().GetOrCreateModule(module_spec, false, &error); |
| process.GetTarget().GetImages().AppendIfNeeded(module_sp, |
| false /* notify */); |
| } else { |
| if (image.load_address != LLDB_INVALID_ADDRESS) { |
| module_sp = DynamicLoader::LoadBinaryWithUUIDAndAddress( |
| &process, image.uuid, image.load_address, |
| false /* value_is_offset */, image.currently_executing, |
| false /* notify */); |
| } else if (image.slide != LLDB_INVALID_ADDRESS) { |
| module_sp = DynamicLoader::LoadBinaryWithUUIDAndAddress( |
| &process, image.uuid, image.slide, true /* value_is_offset */, |
| image.currently_executing, false /* notify */); |
| } |
| } |
| |
| if (module_sp.get()) { |
| // Will call ModulesDidLoad with all modules once they've all |
| // been added to the Target with load addresses. Don't notify |
| // here, before the load address is set. |
| added_modules.Append(module_sp, false /* notify */); |
| if (image.segment_load_addresses.size() > 0) { |
| if (log) { |
| std::string uuidstr = image.uuid.GetAsString(); |
| log->Printf("ObjectFileMachO::LoadCoreFileImages adding binary '%s' " |
| "UUID %s with section load addresses", |
| image.filename.c_str(), uuidstr.c_str()); |
| } |
| for (auto name_vmaddr_tuple : image.segment_load_addresses) { |
| SectionList *sectlist = module_sp->GetObjectFile()->GetSectionList(); |
| if (sectlist) { |
| SectionSP sect_sp = |
| sectlist->FindSectionByName(std::get<0>(name_vmaddr_tuple)); |
| if (sect_sp) { |
| process.GetTarget().SetSectionLoadAddress( |
| sect_sp, std::get<1>(name_vmaddr_tuple)); |
| } |
| } |
| } |
| } else if (image.load_address != LLDB_INVALID_ADDRESS) { |
| if (log) { |
| std::string uuidstr = image.uuid.GetAsString(); |
| log->Printf("ObjectFileMachO::LoadCoreFileImages adding binary '%s' " |
| "UUID %s with load address 0x%" PRIx64, |
| image.filename.c_str(), uuidstr.c_str(), |
| image.load_address); |
| } |
| const bool address_is_slide = false; |
| bool changed = false; |
| module_sp->SetLoadAddress(process.GetTarget(), image.load_address, |
| address_is_slide, changed); |
| } else if (image.slide != 0) { |
| if (log) { |
| std::string uuidstr = image.uuid.GetAsString(); |
| log->Printf("ObjectFileMachO::LoadCoreFileImages adding binary '%s' " |
| "UUID %s with slide amount 0x%" PRIx64, |
| image.filename.c_str(), uuidstr.c_str(), image.slide); |
| } |
| const bool address_is_slide = true; |
| bool changed = false; |
| module_sp->SetLoadAddress(process.GetTarget(), image.slide, |
| address_is_slide, changed); |
| } else { |
| if (log) { |
| std::string uuidstr = image.uuid.GetAsString(); |
| log->Printf("ObjectFileMachO::LoadCoreFileImages adding binary '%s' " |
| "UUID %s at its file address, no slide applied", |
| image.filename.c_str(), uuidstr.c_str()); |
| } |
| const bool address_is_slide = true; |
| bool changed = false; |
| module_sp->SetLoadAddress(process.GetTarget(), 0, address_is_slide, |
| changed); |
| } |
| } |
| } |
| if (added_modules.GetSize() > 0) { |
| process.GetTarget().ModulesDidLoad(added_modules); |
| process.Flush(); |
| return true; |
| } |
| return false; |
| } |