| //===-- ObjectFileMachO.cpp -------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/ADT/StringRef.h" |
| |
| #include "lldb/lldb-private-log.h" |
| #include "lldb/Core/ArchSpec.h" |
| #include "lldb/Core/DataBuffer.h" |
| #include "lldb/Core/Debugger.h" |
| #include "lldb/Core/Error.h" |
| #include "lldb/Core/FileSpecList.h" |
| #include "lldb/Core/Log.h" |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/ModuleSpec.h" |
| #include "lldb/Core/PluginManager.h" |
| #include "lldb/Core/RangeMap.h" |
| #include "lldb/Core/Section.h" |
| #include "lldb/Core/StreamFile.h" |
| #include "lldb/Core/StreamString.h" |
| #include "lldb/Core/Timer.h" |
| #include "lldb/Core/UUID.h" |
| #include "lldb/Host/Host.h" |
| #include "lldb/Host/FileSpec.h" |
| #include "lldb/Symbol/ClangNamespaceDecl.h" |
| #include "lldb/Symbol/DWARFCallFrameInfo.h" |
| #include "lldb/Symbol/ObjectFile.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 "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/Utility/SafeMachO.h" |
| |
| #include "ObjectFileMachO.h" |
| |
| #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__)) |
| // GetLLDBSharedCacheUUID() needs to call dlsym() |
| #include <dlfcn.h> |
| #endif |
| |
| #ifndef __APPLE__ |
| #include "Utility/UuidCompatibility.h" |
| #endif |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| using namespace llvm::MachO; |
| |
| 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); |
| } |
| |
| virtual void |
| InvalidateAllRegisters () |
| { |
| // 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 size_t |
| WriteRegister (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 == NULL) |
| 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 reg_byte_size; |
| } |
| } |
| // Just write zeros if all else fails |
| for (size_t i=0; i<reg_byte_size; ++ i) |
| data.PutChar(0); |
| return reg_byte_size; |
| } |
| |
| 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 (sizeof(GPR)/sizeof(uint64_t)); // Number of uint64_t values that follow |
| WriteRegister (reg_ctx, "rax", NULL, 8, data); |
| WriteRegister (reg_ctx, "rbx", NULL, 8, data); |
| WriteRegister (reg_ctx, "rcx", NULL, 8, data); |
| WriteRegister (reg_ctx, "rdx", NULL, 8, data); |
| WriteRegister (reg_ctx, "rdi", NULL, 8, data); |
| WriteRegister (reg_ctx, "rsi", NULL, 8, data); |
| WriteRegister (reg_ctx, "rbp", NULL, 8, data); |
| WriteRegister (reg_ctx, "rsp", NULL, 8, data); |
| WriteRegister (reg_ctx, "r8", NULL, 8, data); |
| WriteRegister (reg_ctx, "r9", NULL, 8, data); |
| WriteRegister (reg_ctx, "r10", NULL, 8, data); |
| WriteRegister (reg_ctx, "r11", NULL, 8, data); |
| WriteRegister (reg_ctx, "r12", NULL, 8, data); |
| WriteRegister (reg_ctx, "r13", NULL, 8, data); |
| WriteRegister (reg_ctx, "r14", NULL, 8, data); |
| WriteRegister (reg_ctx, "r15", NULL, 8, data); |
| WriteRegister (reg_ctx, "rip", NULL, 8, data); |
| WriteRegister (reg_ctx, "rflags", NULL, 8, data); |
| WriteRegister (reg_ctx, "cs", NULL, 8, data); |
| WriteRegister (reg_ctx, "fs", NULL, 8, data); |
| WriteRegister (reg_ctx, "gs", NULL, 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 (sizeof(EXC)/sizeof(uint64_t)); |
| WriteRegister (reg_ctx, "trapno", NULL, 4, data); |
| WriteRegister (reg_ctx, "err", NULL, 4, data); |
| WriteRegister (reg_ctx, "faultvaddr", NULL, 8, data); |
| return true; |
| } |
| return false; |
| } |
| |
| protected: |
| virtual int |
| DoReadGPR (lldb::tid_t tid, int flavor, GPR &gpr) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoReadFPU (lldb::tid_t tid, int flavor, FPU &fpu) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoReadEXC (lldb::tid_t tid, int flavor, EXC &exc) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoWriteGPR (lldb::tid_t tid, int flavor, const GPR &gpr) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoWriteFPU (lldb::tid_t tid, int flavor, const FPU &fpu) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoWriteEXC (lldb::tid_t tid, int flavor, const EXC &exc) |
| { |
| 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); |
| } |
| |
| virtual void |
| InvalidateAllRegisters () |
| { |
| // 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; |
| } |
| } |
| } |
| } |
| protected: |
| virtual int |
| DoReadGPR (lldb::tid_t tid, int flavor, GPR &gpr) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoReadFPU (lldb::tid_t tid, int flavor, FPU &fpu) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoReadEXC (lldb::tid_t tid, int flavor, EXC &exc) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoWriteGPR (lldb::tid_t tid, int flavor, const GPR &gpr) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoWriteFPU (lldb::tid_t tid, int flavor, const FPU &fpu) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoWriteEXC (lldb::tid_t tid, int flavor, const EXC &exc) |
| { |
| 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); |
| } |
| |
| virtual void |
| InvalidateAllRegisters () |
| { |
| // 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: |
| for (uint32_t i=0; i<count; ++i) |
| { |
| gpr.r[i] = data.GetU32(&offset); |
| } |
| |
| // Note that gpr.cpsr is also copied by the above loop; this loop technically extends |
| // one element past the end of the gpr.r[] array. |
| |
| 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; |
| } |
| } |
| } |
| protected: |
| virtual int |
| DoReadGPR (lldb::tid_t tid, int flavor, GPR &gpr) |
| { |
| return -1; |
| } |
| |
| virtual int |
| DoReadFPU (lldb::tid_t tid, int flavor, FPU &fpu) |
| { |
| return -1; |
| } |
| |
| virtual int |
| DoReadEXC (lldb::tid_t tid, int flavor, EXC &exc) |
| { |
| return -1; |
| } |
| |
| virtual int |
| DoReadDBG (lldb::tid_t tid, int flavor, DBG &dbg) |
| { |
| return -1; |
| } |
| |
| virtual int |
| DoWriteGPR (lldb::tid_t tid, int flavor, const GPR &gpr) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoWriteFPU (lldb::tid_t tid, int flavor, const FPU &fpu) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoWriteEXC (lldb::tid_t tid, int flavor, const EXC &exc) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoWriteDBG (lldb::tid_t tid, int flavor, const DBG &dbg) |
| { |
| 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); |
| } |
| |
| virtual void |
| InvalidateAllRegisters () |
| { |
| // 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<33; ++i) |
| gpr.x[i] = 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 |
| && 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; |
| } |
| } |
| } |
| protected: |
| virtual int |
| DoReadGPR (lldb::tid_t tid, int flavor, GPR &gpr) |
| { |
| return -1; |
| } |
| |
| virtual int |
| DoReadFPU (lldb::tid_t tid, int flavor, FPU &fpu) |
| { |
| return -1; |
| } |
| |
| virtual int |
| DoReadEXC (lldb::tid_t tid, int flavor, EXC &exc) |
| { |
| return -1; |
| } |
| |
| virtual int |
| DoReadDBG (lldb::tid_t tid, int flavor, DBG &dbg) |
| { |
| return -1; |
| } |
| |
| virtual int |
| DoWriteGPR (lldb::tid_t tid, int flavor, const GPR &gpr) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoWriteFPU (lldb::tid_t tid, int flavor, const FPU &fpu) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoWriteEXC (lldb::tid_t tid, int flavor, const EXC &exc) |
| { |
| return 0; |
| } |
| |
| virtual int |
| DoWriteDBG (lldb::tid_t tid, int flavor, const DBG &dbg) |
| { |
| return -1; |
| } |
| }; |
| |
| static uint32_t |
| MachHeaderSizeFromMagic(uint32_t magic) |
| { |
| switch (magic) |
| { |
| case MH_MAGIC: |
| case MH_CIGAM: |
| return sizeof(struct mach_header); |
| |
| case MH_MAGIC_64: |
| case MH_CIGAM_64: |
| return sizeof(struct mach_header_64); |
| break; |
| |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| #define MACHO_NLIST_ARM_SYMBOL_IS_THUMB 0x0008 |
| |
| void |
| ObjectFileMachO::Initialize() |
| { |
| PluginManager::RegisterPlugin (GetPluginNameStatic(), |
| GetPluginDescriptionStatic(), |
| CreateInstance, |
| CreateMemoryInstance, |
| GetModuleSpecifications, |
| SaveCore); |
| } |
| |
| void |
| ObjectFileMachO::Terminate() |
| { |
| PluginManager::UnregisterPlugin (CreateInstance); |
| } |
| |
| |
| lldb_private::ConstString |
| ObjectFileMachO::GetPluginNameStatic() |
| { |
| static ConstString g_name("mach-o"); |
| return g_name; |
| } |
| |
| const char * |
| ObjectFileMachO::GetPluginDescriptionStatic() |
| { |
| return "Mach-o object file reader (32 and 64 bit)"; |
| } |
| |
| 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 = file->MemoryMapFileContents(file_offset, length); |
| data_offset = 0; |
| } |
| |
| if (ObjectFileMachO::MagicBytesMatch(data_sp, data_offset, length)) |
| { |
| // Update the data to contain the entire file if it doesn't already |
| if (data_sp->GetByteSize() < length) |
| { |
| data_sp = file->MemoryMapFileContents(file_offset, length); |
| data_offset = 0; |
| } |
| std::unique_ptr<ObjectFile> objfile_ap(new ObjectFileMachO (module_sp, data_sp, data_offset, file, file_offset, length)); |
| if (objfile_ap.get() && objfile_ap->ParseHeader()) |
| return objfile_ap.release(); |
| } |
| return NULL; |
| } |
| |
| ObjectFile * |
| ObjectFileMachO::CreateMemoryInstance (const lldb::ModuleSP &module_sp, |
| DataBufferSP& 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_ap(new ObjectFileMachO (module_sp, data_sp, process_sp, header_addr)); |
| if (objfile_ap.get() && objfile_ap->ParseHeader()) |
| return objfile_ap.release(); |
| } |
| return NULL; |
| } |
| |
| 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 = file.ReadFileContents(file_offset, header_and_load_cmds); |
| data.SetData(data_sp); |
| data_offset = MachHeaderSizeFromMagic(header.magic); |
| } |
| if (data_sp) |
| { |
| ModuleSpec spec; |
| spec.GetFileSpec() = file; |
| spec.SetObjectOffset(file_offset); |
| |
| if (GetArchitecture (header, data, data_offset, spec.GetArchitecture())) |
| { |
| if (spec.GetArchitecture().IsValid()) |
| { |
| GetUUID (header, data, data_offset, spec.GetUUID()); |
| specs.Append(spec); |
| } |
| } |
| } |
| } |
| } |
| return specs.GetSize() - initial_count; |
| } |
| |
| |
| |
| const ConstString & |
| ObjectFileMachO::GetSegmentNameTEXT() |
| { |
| static ConstString g_segment_name_TEXT ("__TEXT"); |
| return g_segment_name_TEXT; |
| } |
| |
| const ConstString & |
| ObjectFileMachO::GetSegmentNameDATA() |
| { |
| static ConstString g_segment_name_DATA ("__DATA"); |
| return g_segment_name_DATA; |
| } |
| |
| const ConstString & |
| ObjectFileMachO::GetSegmentNameOBJC() |
| { |
| static ConstString g_segment_name_OBJC ("__OBJC"); |
| return g_segment_name_OBJC; |
| } |
| |
| const ConstString & |
| ObjectFileMachO::GetSegmentNameLINKEDIT() |
| { |
| static ConstString g_section_name_LINKEDIT ("__LINKEDIT"); |
| return g_section_name_LINKEDIT; |
| } |
| |
| const 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) |
| { |
| ::memset (&m_header, 0, sizeof(m_header)); |
| ::memset (&m_dysymtab, 0, sizeof(m_dysymtab)); |
| } |
| |
| ObjectFileMachO::ObjectFileMachO (const lldb::ModuleSP &module_sp, |
| lldb::DataBufferSP& 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) |
| { |
| ::memset (&m_header, 0, sizeof(m_header)); |
| ::memset (&m_dysymtab, 0, sizeof(m_dysymtab)); |
| } |
| |
| ObjectFileMachO::~ObjectFileMachO() |
| { |
| } |
| |
| bool |
| ObjectFileMachO::ParseHeader (DataExtractor &data, |
| lldb::offset_t *data_offset_ptr, |
| llvm::MachO::mach_header &header) |
| { |
| data.SetByteOrder (lldb::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 (lldb::endian::InlHostByteOrder()); |
| data.SetAddressByteSize(4); |
| can_parse = true; |
| break; |
| |
| case MH_MAGIC_64: |
| data.SetByteOrder (lldb::endian::InlHostByteOrder()); |
| data.SetAddressByteSize(8); |
| can_parse = true; |
| is_64_bit = true; |
| break; |
| |
| case MH_CIGAM: |
| data.SetByteOrder(lldb::endian::InlHostByteOrder() == eByteOrderBig ? eByteOrderLittle : eByteOrderBig); |
| data.SetAddressByteSize(4); |
| can_parse = true; |
| break; |
| |
| case MH_CIGAM_64: |
| data.SetByteOrder(lldb::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) |
| { |
| lldb_private::Mutex::Locker locker(module_sp->GetMutex()); |
| bool can_parse = false; |
| lldb::offset_t offset = 0; |
| m_data.SetByteOrder (lldb::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 (lldb::endian::InlHostByteOrder()); |
| m_data.SetAddressByteSize(4); |
| can_parse = true; |
| break; |
| |
| case MH_MAGIC_64: |
| m_data.SetByteOrder (lldb::endian::InlHostByteOrder()); |
| m_data.SetAddressByteSize(8); |
| can_parse = true; |
| break; |
| |
| case MH_CIGAM: |
| m_data.SetByteOrder(lldb::endian::InlHostByteOrder() == eByteOrderBig ? eByteOrderLittle : eByteOrderBig); |
| m_data.SetAddressByteSize(4); |
| can_parse = true; |
| break; |
| |
| case MH_CIGAM_64: |
| m_data.SetByteOrder(lldb::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); |
| |
| |
| ArchSpec mach_arch; |
| |
| if (GetArchitecture (mach_arch)) |
| { |
| // Check if the module has a required architecture |
| const ArchSpec &module_arch = module_sp->GetArchitecture(); |
| if (module_arch.IsValid() && !module_arch.IsCompatibleMatch(mach_arch)) |
| return false; |
| |
| 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 = m_file.ReadFileContents(m_file_offset, header_and_lc_size); |
| if (data_sp->GetByteSize() != header_and_lc_size) |
| return false; |
| } |
| if (data_sp) |
| m_data.SetData (data_sp); |
| } |
| } |
| return true; |
| } |
| } |
| else |
| { |
| memset(&m_header, 0, sizeof(struct mach_header)); |
| } |
| } |
| return false; |
| } |
| |
| |
| ByteOrder |
| ObjectFileMachO::GetByteOrder () const |
| { |
| return m_data.GetByteOrder (); |
| } |
| |
| bool |
| ObjectFileMachO::IsExecutable() const |
| { |
| return m_header.filetype == MH_EXECUTE; |
| } |
| |
| uint32_t |
| ObjectFileMachO::GetAddressByteSize () const |
| { |
| return m_data.GetAddressByteSize (); |
| } |
| |
| AddressClass |
| ObjectFileMachO::GetAddressClass (lldb::addr_t file_addr) |
| { |
| Symtab *symtab = GetSymtab(); |
| if (symtab) |
| { |
| Symbol *symbol = symtab->FindSymbolContainingFileAddress(file_addr); |
| if (symbol) |
| { |
| if (symbol->ValueIsAddress()) |
| { |
| SectionSP section_sp (symbol->GetAddress().GetSection()); |
| if (section_sp) |
| { |
| const lldb::SectionType section_type = section_sp->GetType(); |
| switch (section_type) |
| { |
| case eSectionTypeInvalid: return eAddressClassUnknown; |
| 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 eAddressClassCodeAlternateISA; |
| } |
| return eAddressClassCode; |
| |
| case eSectionTypeContainer: return eAddressClassUnknown; |
| case eSectionTypeData: |
| case eSectionTypeDataCString: |
| case eSectionTypeDataCStringPointers: |
| case eSectionTypeDataSymbolAddress: |
| case eSectionTypeData4: |
| case eSectionTypeData8: |
| case eSectionTypeData16: |
| case eSectionTypeDataPointers: |
| case eSectionTypeZeroFill: |
| case eSectionTypeDataObjCMessageRefs: |
| case eSectionTypeDataObjCCFStrings: |
| return eAddressClassData; |
| case eSectionTypeDebug: |
| case eSectionTypeDWARFDebugAbbrev: |
| case eSectionTypeDWARFDebugAranges: |
| case eSectionTypeDWARFDebugFrame: |
| case eSectionTypeDWARFDebugInfo: |
| case eSectionTypeDWARFDebugLine: |
| case eSectionTypeDWARFDebugLoc: |
| case eSectionTypeDWARFDebugMacInfo: |
| case eSectionTypeDWARFDebugPubNames: |
| case eSectionTypeDWARFDebugPubTypes: |
| case eSectionTypeDWARFDebugRanges: |
| case eSectionTypeDWARFDebugStr: |
| case eSectionTypeDWARFAppleNames: |
| case eSectionTypeDWARFAppleTypes: |
| case eSectionTypeDWARFAppleNamespaces: |
| case eSectionTypeDWARFAppleObjC: |
| return eAddressClassDebug; |
| case eSectionTypeEHFrame: return eAddressClassRuntime; |
| case eSectionTypeELFSymbolTable: |
| case eSectionTypeELFDynamicSymbols: |
| case eSectionTypeELFRelocationEntries: |
| case eSectionTypeELFDynamicLinkInfo: |
| case eSectionTypeOther: return eAddressClassUnknown; |
| } |
| } |
| } |
| |
| const SymbolType symbol_type = symbol->GetType(); |
| switch (symbol_type) |
| { |
| case eSymbolTypeAny: return eAddressClassUnknown; |
| case eSymbolTypeAbsolute: return eAddressClassUnknown; |
| |
| 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 eAddressClassCodeAlternateISA; |
| } |
| return eAddressClassCode; |
| |
| case eSymbolTypeData: return eAddressClassData; |
| case eSymbolTypeRuntime: return eAddressClassRuntime; |
| case eSymbolTypeException: return eAddressClassRuntime; |
| case eSymbolTypeSourceFile: return eAddressClassDebug; |
| case eSymbolTypeHeaderFile: return eAddressClassDebug; |
| case eSymbolTypeObjectFile: return eAddressClassDebug; |
| case eSymbolTypeCommonBlock: return eAddressClassDebug; |
| case eSymbolTypeBlock: return eAddressClassDebug; |
| case eSymbolTypeLocal: return eAddressClassData; |
| case eSymbolTypeParam: return eAddressClassData; |
| case eSymbolTypeVariable: return eAddressClassData; |
| case eSymbolTypeVariableType: return eAddressClassDebug; |
| case eSymbolTypeLineEntry: return eAddressClassDebug; |
| case eSymbolTypeLineHeader: return eAddressClassDebug; |
| case eSymbolTypeScopeBegin: return eAddressClassDebug; |
| case eSymbolTypeScopeEnd: return eAddressClassDebug; |
| case eSymbolTypeAdditional: return eAddressClassUnknown; |
| case eSymbolTypeCompiler: return eAddressClassDebug; |
| case eSymbolTypeInstrumentation:return eAddressClassDebug; |
| case eSymbolTypeUndefined: return eAddressClassUnknown; |
| case eSymbolTypeObjCClass: return eAddressClassRuntime; |
| case eSymbolTypeObjCMetaClass: return eAddressClassRuntime; |
| case eSymbolTypeObjCIVar: return eAddressClassRuntime; |
| case eSymbolTypeReExported: return eAddressClassRuntime; |
| } |
| } |
| } |
| return eAddressClassUnknown; |
| } |
| |
| Symtab * |
| ObjectFileMachO::GetSymtab() |
| { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) |
| { |
| lldb_private::Mutex::Locker locker(module_sp->GetMutex()); |
| if (m_symtab_ap.get() == NULL) |
| { |
| m_symtab_ap.reset(new Symtab(this)); |
| Mutex::Locker symtab_locker (m_symtab_ap->GetMutex()); |
| ParseSymtab (); |
| m_symtab_ap->Finalize (); |
| } |
| } |
| return m_symtab_ap.get(); |
| } |
| |
| 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; |
| |
| load_command lc; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL) |
| 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) == NULL) |
| { |
| // 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; |
| } |
| |
| void |
| ObjectFileMachO::CreateSections (SectionList &unified_section_list) |
| { |
| if (!m_sections_ap.get()) |
| { |
| m_sections_ap.reset(new SectionList()); |
| |
| const bool is_dsym = (m_header.filetype == MH_DSYM); |
| lldb::user_id_t segID = 0; |
| lldb::user_id_t sectID = 0; |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| uint32_t i; |
| const bool is_core = GetType() == eTypeCoreFile; |
| //bool dump_sections = false; |
| ModuleSP module_sp (GetModule()); |
| // First look up any LC_ENCRYPTION_INFO load commands |
| typedef RangeArray<uint32_t, uint32_t, 8> EncryptedFileRanges; |
| EncryptedFileRanges encrypted_file_ranges; |
| encryption_info_command encryption_cmd; |
| for (i=0; i<m_header.ncmds; ++i) |
| { |
| const lldb::offset_t load_cmd_offset = offset; |
| if (m_data.GetU32(&offset, &encryption_cmd, 2) == NULL) |
| break; |
| |
| if (encryption_cmd.cmd == LC_ENCRYPTION_INFO) |
| { |
| 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); |
| encrypted_file_ranges.Append(entry); |
| } |
| } |
| } |
| offset = load_cmd_offset + encryption_cmd.cmdsize; |
| } |
| |
| offset = MachHeaderSizeFromMagic(m_header.magic); |
| |
| struct segment_command_64 load_cmd; |
| for (i=0; i<m_header.ncmds; ++i) |
| { |
| const lldb::offset_t load_cmd_offset = offset; |
| if (m_data.GetU32(&offset, &load_cmd, 2) == NULL) |
| break; |
| |
| if (load_cmd.cmd == LC_SEGMENT || load_cmd.cmd == LC_SEGMENT_64) |
| { |
| if (m_data.GetU8(&offset, (uint8_t*)load_cmd.segname, 16)) |
| { |
| bool add_section = true; |
| bool add_to_unified = true; |
| ConstString const_segname (load_cmd.segname, std::min<size_t>(strlen(load_cmd.segname), sizeof(load_cmd.segname))); |
| |
| SectionSP unified_section_sp(unified_section_list.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_length != 0 && load_cmd.filesize != 0) |
| { |
| if (load_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()) -- all we can do |
| // is null out the SectionList vector and if a process has been set up, dump a message |
| // to stdout. The most common case here is core file debugging with a truncated file. |
| const char *lc_segment_name = load_cmd.cmd == LC_SEGMENT_64 ? "LC_SEGMENT_64" : "LC_SEGMENT"; |
| module_sp->ReportWarning("load command %u %s has a fileoff (0x%" PRIx64 ") that extends beyond the end of the file (0x%" PRIx64 "), ignoring this section", |
| i, |
| lc_segment_name, |
| load_cmd.fileoff, |
| m_length); |
| |
| load_cmd.fileoff = 0; |
| load_cmd.filesize = 0; |
| } |
| |
| if (load_cmd.fileoff + load_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()) -- all we can do |
| // is null out the SectionList vector and if a process has been set up, dump a message |
| // to stdout. The most common case here is core file debugging with a truncated file. |
| const char *lc_segment_name = load_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", |
| i, |
| lc_segment_name, |
| load_cmd.fileoff + load_cmd.filesize, |
| m_length); |
| |
| // Tuncase the length |
| load_cmd.filesize = m_length - load_cmd.fileoff; |
| } |
| } |
| if (m_data.GetU32(&offset, &load_cmd.maxprot, 4)) |
| { |
| |
| 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.reset(new Section (module_sp, // Module to which this section belongs |
| this, // Object file to which this sections belongs |
| ++segID << 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_ap->AddSection(segment_sp); |
| if (add_to_unified) |
| unified_section_list.AddSection(segment_sp); |
| } |
| else if (unified_section_sp) |
| { |
| if (is_dsym && unified_section_sp->GetFileAddress() != load_cmd.vmaddr) |
| { |
| // Check to see if the module was read from memory? |
| if (module_sp->GetObjectFile()->GetHeaderAddress().IsValid()) |
| { |
| // We have a module that is in memory and needs to have its |
| // file address adjusted. We need to do this because when we |
| // load a file from memory, its addresses will be slid already, |
| // yet the addresses in the new symbol file will still be unslid. |
| // Since everything is stored as section offset, this shouldn't |
| // cause any problems. |
| |
| // 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); |
| } |
| } |
| m_sections_ap->AddSection(unified_section_sp); |
| } |
| |
| struct 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 = sectID + 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)) == NULL) |
| break; |
| if (m_data.GetU8(&offset, (uint8_t*)sect64.segname, sizeof(sect64.segname)) == NULL) |
| break; |
| sect64.addr = m_data.GetAddress(&offset); |
| sect64.size = m_data.GetAddress(&offset); |
| |
| if (m_data.GetU32(&offset, §64.offset, num_u32s) == NULL) |
| break; |
| |
| // 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, std::min<size_t>(strlen(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 = unified_section_list.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.reset(new Section (segment_sp, // Parent section |
| module_sp, // Module to which this section belongs |
| this, // Object file to which this section belongs |
| ++segID << 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); |
| |
| m_sections_ap->AddSection(segment_sp); |
| if (add_to_unified) |
| unified_section_list.AddSection(segment_sp); |
| segment_sp->SetIsEncrypted (segment_is_encrypted); |
| } |
| } |
| assert (segment_sp.get()); |
| |
| lldb::SectionType sect_type = eSectionTypeOther; |
| |
| if (sect64.flags & (S_ATTR_PURE_INSTRUCTIONS | S_ATTR_SOME_INSTRUCTIONS)) |
| sect_type = eSectionTypeCode; |
| else |
| { |
| uint32_t mach_sect_type = sect64.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_macinfo ("__debug_macinfo"); |
| 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_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_text ("__text"); |
| static ConstString g_sect_name_data ("__data"); |
| |
| |
| if (section_name == g_sect_name_dwarf_debug_abbrev) |
| sect_type = eSectionTypeDWARFDebugAbbrev; |
| else if (section_name == g_sect_name_dwarf_debug_aranges) |
| sect_type = eSectionTypeDWARFDebugAranges; |
| else if (section_name == g_sect_name_dwarf_debug_frame) |
| sect_type = eSectionTypeDWARFDebugFrame; |
| else if (section_name == g_sect_name_dwarf_debug_info) |
| sect_type = eSectionTypeDWARFDebugInfo; |
| else if (section_name == g_sect_name_dwarf_debug_line) |
| sect_type = eSectionTypeDWARFDebugLine; |
| else if (section_name == g_sect_name_dwarf_debug_loc) |
| sect_type = eSectionTypeDWARFDebugLoc; |
| else if (section_name == g_sect_name_dwarf_debug_macinfo) |
| sect_type = eSectionTypeDWARFDebugMacInfo; |
| else if (section_name == g_sect_name_dwarf_debug_pubnames) |
| sect_type = eSectionTypeDWARFDebugPubNames; |
| else if (section_name == g_sect_name_dwarf_debug_pubtypes) |
| sect_type = eSectionTypeDWARFDebugPubTypes; |
| else if (section_name == g_sect_name_dwarf_debug_ranges) |
| sect_type = eSectionTypeDWARFDebugRanges; |
| else if (section_name == g_sect_name_dwarf_debug_str) |
| sect_type = eSectionTypeDWARFDebugStr; |
| else if (section_name == g_sect_name_dwarf_apple_names) |
| sect_type = eSectionTypeDWARFAppleNames; |
| else if (section_name == g_sect_name_dwarf_apple_types) |
| sect_type = eSectionTypeDWARFAppleTypes; |
| else if (section_name == g_sect_name_dwarf_apple_namespaces) |
| sect_type = eSectionTypeDWARFAppleNamespaces; |
| else if (section_name == g_sect_name_dwarf_apple_objc) |
| sect_type = eSectionTypeDWARFAppleObjC; |
| else if (section_name == g_sect_name_objc_selrefs) |
| sect_type = eSectionTypeDataCStringPointers; |
| else if (section_name == g_sect_name_objc_msgrefs) |
| sect_type = eSectionTypeDataObjCMessageRefs; |
| else if (section_name == g_sect_name_eh_frame) |
| sect_type = eSectionTypeEHFrame; |
| else if (section_name == g_sect_name_cfstring) |
| sect_type = eSectionTypeDataObjCCFStrings; |
| else 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) |
| { |
| sect_type = eSectionTypeDataPointers; |
| } |
| |
| if (sect_type == eSectionTypeOther) |
| { |
| switch (mach_sect_type) |
| { |
| // TODO: categorize sections by other flags for regular sections |
| case S_REGULAR: |
| if (section_name == g_sect_name_text) |
| sect_type = eSectionTypeCode; |
| else if (section_name == g_sect_name_data) |
| sect_type = eSectionTypeData; |
| else |
| sect_type = eSectionTypeOther; |
| break; |
| case S_ZEROFILL: sect_type = eSectionTypeZeroFill; break; |
| case S_CSTRING_LITERALS: sect_type = eSectionTypeDataCString; break; // section with only literal C strings |
| case S_4BYTE_LITERALS: sect_type = eSectionTypeData4; break; // section with only 4 byte literals |
| case S_8BYTE_LITERALS: sect_type = eSectionTypeData8; break; // section with only 8 byte literals |
| case S_LITERAL_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only pointers to literals |
| case S_NON_LAZY_SYMBOL_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only non-lazy symbol pointers |
| case S_LAZY_SYMBOL_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only lazy symbol pointers |
| case S_SYMBOL_STUBS: sect_type = eSectionTypeCode; break; // section with only symbol stubs, byte size of stub in the reserved2 field |
| case S_MOD_INIT_FUNC_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only function pointers for initialization |
| case S_MOD_TERM_FUNC_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only function pointers for termination |
| case S_COALESCED: sect_type = eSectionTypeOther; break; |
| case S_GB_ZEROFILL: sect_type = eSectionTypeZeroFill; break; |
| case S_INTERPOSING: sect_type = eSectionTypeCode; break; // section with only pairs of function pointers for interposing |
| case S_16BYTE_LITERALS: sect_type = eSectionTypeData16; break; // section with only 16 byte literals |
| case S_DTRACE_DOF: sect_type = eSectionTypeDebug; break; |
| case S_LAZY_DYLIB_SYMBOL_POINTERS: sect_type = eSectionTypeDataPointers; break; |
| default: break; |
| } |
| } |
| } |
| |
| SectionSP section_sp(new Section (segment_sp, |
| module_sp, |
| this, |
| ++sectID, |
| 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 = encrypted_file_ranges.FindEntryThatContains(sect64.offset) != NULL; |
| |
| section_sp->SetIsEncrypted (segment_is_encrypted || section_is_encrypted); |
| 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 <= sectID) |
| { |
| lldb::user_id_t sect_uid; |
| for (sect_uid = first_segment_sectID; sect_uid <= sectID; ++sect_uid) |
| { |
| SectionSP curr_section_sp(segment_sp->GetChildren().FindSectionByID (sect_uid)); |
| SectionSP next_section_sp; |
| if (sect_uid + 1 <= sectID) |
| 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() != NULL) |
| curr_section_sp->SetByteSize ( next_section_sp->GetFileAddress() - curr_section_sp->GetFileAddress() ); |
| else |
| curr_section_sp->SetByteSize ( load_cmd.vmsize ); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| else if (load_cmd.cmd == LC_DYSYMTAB) |
| { |
| 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); |
| } |
| |
| offset = load_cmd_offset + load_cmd.cmdsize; |
| } |
| } |
| } |
| |
| 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 |
| { |
| Host::SystemLog (Host::eSystemLogError, "error: unable to find section for section %u\n", n_sect); |
| } |
| } |
| 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; |
| }; |
| |
| struct TrieEntry |
| { |
| TrieEntry () : |
| name(), |
| address(LLDB_INVALID_ADDRESS), |
| flags (0), |
| other(0), |
| import_name() |
| { |
| } |
| |
| void |
| Clear () |
| { |
| name.Clear(); |
| address = LLDB_INVALID_ADDRESS; |
| flags = 0; |
| other = 0; |
| import_name.Clear(); |
| } |
| |
| 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; |
| uint64_t flags; |
| uint64_t other; |
| 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 void |
| ParseTrieEntries (DataExtractor &data, |
| lldb::offset_t offset, |
| std::vector<llvm::StringRef> &nameSlices, |
| std::set<lldb::addr_t> &resolver_addresses, |
| std::vector<TrieEntryWithOffset>& output) |
| { |
| if (!data.ValidOffset(offset)) |
| return; |
| |
| 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 = NULL; |
| 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 ( e.entry.flags & EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER ) |
| { |
| //resolver_addresses.insert(e.entry.address); |
| e.entry.other = data.GetULEB128(&offset); |
| resolver_addresses.insert(e.entry.other); |
| } |
| else |
| e.entry.other = 0; |
| } |
| // Only add symbols that are reexport symbols with a valid import name |
| if (EXPORT_SYMBOL_FLAGS_REEXPORT & e.entry.flags && import_name && import_name[0]) |
| { |
| 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); |
| } |
| output.push_back(e); |
| } |
| } |
| |
| const uint8_t childrenCount = data.GetU8(&children_offset); |
| for (uint8_t i=0; i < childrenCount; ++i) { |
| nameSlices.push_back(data.GetCStr(&children_offset)); |
| lldb::offset_t childNodeOffset = data.GetULEB128(&children_offset); |
| if (childNodeOffset) |
| { |
| ParseTrieEntries(data, |
| childNodeOffset, |
| nameSlices, |
| resolver_addresses, |
| output); |
| } |
| nameSlices.pop_back(); |
| } |
| } |
| |
| size_t |
| ObjectFileMachO::ParseSymtab () |
| { |
| Timer scoped_timer(__PRETTY_FUNCTION__, |
| "ObjectFileMachO::ParseSymtab () module = %s", |
| m_file.GetFilename().AsCString("")); |
| ModuleSP module_sp (GetModule()); |
| if (!module_sp) |
| return 0; |
| |
| struct symtab_command symtab_load_command = { 0, 0, 0, 0, 0, 0 }; |
| struct linkedit_data_command function_starts_load_command = { 0, 0, 0, 0 }; |
| struct dyld_info_command dyld_info = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; |
| typedef AddressDataArray<lldb::addr_t, bool, 100> FunctionStarts; |
| FunctionStarts function_starts; |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| uint32_t i; |
| FileSpecList dylib_files; |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SYMBOLS)); |
| |
| for (i=0; i<m_header.ncmds; ++i) |
| { |
| const lldb::offset_t cmd_offset = offset; |
| // Read in the load command and load command size |
| struct load_command lc; |
| if (m_data.GetU32(&offset, &lc, 2) == NULL) |
| 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) == 0) // fill in symoff, nsyms, stroff, strsize fields |
| return 0; |
| if (symtab_load_command.symoff == 0) |
| { |
| if (log) |
| module_sp->LogMessage(log, "LC_SYMTAB.symoff == 0"); |
| return 0; |
| } |
| |
| if (symtab_load_command.stroff == 0) |
| { |
| if (log) |
| module_sp->LogMessage(log, "LC_SYMTAB.stroff == 0"); |
| return 0; |
| } |
| |
| if (symtab_load_command.nsyms == 0) |
| { |
| if (log) |
| module_sp->LogMessage(log, "LC_SYMTAB.nsyms == 0"); |
| return 0; |
| } |
| |
| if (symtab_load_command.strsize == 0) |
| { |
| if (log) |
| module_sp->LogMessage(log, "LC_SYMTAB.strsize == 0"); |
| return 0; |
| } |
| 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, false); |
| // Strip the path if there is @rpath, @executable, etc so we just use the basename |
| if (path[0] == '@') |
| file_spec.GetDirectory().Clear(); |
| |
| if (lc.cmd == LC_REEXPORT_DYLIB) |
| { |
| m_reexported_dylibs.AppendIfUnique(file_spec); |
| } |
| |
| dylib_files.Append(file_spec); |
| } |
| } |
| 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) == NULL) // fill in symoff, nsyms, stroff, strsize fields |
| memset (&function_starts_load_command, 0, sizeof(function_starts_load_command)); |
| break; |
| |
| default: |
| break; |
| } |
| offset = cmd_offset + lc.cmdsize; |
| } |
| |
| if (symtab_load_command.cmd) |
| { |
| Symtab *symtab = m_symtab_ap.get(); |
| SectionList *section_list = GetSectionList(); |
| if (section_list == NULL) |
| return 0; |
| |
| 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 (NULL, 0, byte_order, addr_byte_size); |
| DataExtractor strtab_data (NULL, 0, byte_order, addr_byte_size); |
| DataExtractor function_starts_data (NULL, 0, byte_order, addr_byte_size); |
| DataExtractor indirect_symbol_index_data (NULL, 0, byte_order, addr_byte_size); |
| DataExtractor dyld_trie_data (NULL, 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; |
| |
| if (process && m_header.filetype != llvm::MachO::MH_OBJECT) |
| { |
| Target &target = process->GetTarget(); |
| |
| memory_module_load_level = target.GetMemoryModuleLoadLevel(); |
| |
| SectionSP linkedit_section_sp(section_list->FindSectionByName(GetSegmentNameLINKEDIT())); |
| // Reading mach file from memory in a process or core file... |
| |
| if (linkedit_section_sp) |
| { |
| const addr_t linkedit_load_addr = linkedit_section_sp->GetLoadBaseAddress(&target); |
| 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; |
| |
| bool data_was_read = false; |
| |
| #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__)) |
| if (m_header.flags & 0x80000000u && process->GetAddressByteSize() == sizeof (void*)) |
| { |
| // This mach-o memory file is in the dyld shared cache. If this |
| // program is not remote and this is iOS, then this process will |
| // share the same shared cache as the process we are debugging and |
| // we can read the entire __LINKEDIT from the address space in this |
| // process. This is a needed optimization that is used for local iOS |
| // debugging only since all shared libraries in the shared cache do |
| // not have corresponding files that exist in the file system of the |
| // device. They have been combined into a single file. This means we |
| // always have to load these files from memory. All of the symbol and |
| // string tables from all of the __LINKEDIT sections from the shared |
| // libraries in the shared cache have been merged into a single large |
| // symbol and string table. Reading all of this symbol and string table |
| // data across can slow down debug launch times, so we optimize this by |
| // reading the memory for the __LINKEDIT section from this process. |
| |
| UUID lldb_shared_cache(GetLLDBSharedCacheUUID()); |
| UUID process_shared_cache(GetProcessSharedCacheUUID(process)); |
| bool use_lldb_cache = true; |
| if (lldb_shared_cache.IsValid() && process_shared_cache.IsValid() && lldb_shared_cache != process_shared_cache) |
| { |
| use_lldb_cache = false; |
| ModuleSP module_sp (GetModule()); |
| if (module_sp) |
| module_sp->ReportWarning ("shared cache in process does not match lldb's own shared cache, startup will be slow."); |
| |
| } |
| |
| PlatformSP platform_sp (target.GetPlatform()); |
| if (platform_sp && platform_sp->IsHost() && use_lldb_cache) |
| { |
| data_was_read = true; |
| nlist_data.SetData((void *)symoff_addr, nlist_data_byte_size, eByteOrderLittle); |
| strtab_data.SetData((void *)strtab_addr, strtab_data_byte_size, eByteOrderLittle); |
| if (function_starts_load_command.cmd) |
| { |
| const addr_t func_start_addr = linkedit_load_addr + function_starts_load_command.dataoff - linkedit_file_offset; |
| function_starts_data.SetData ((void *)func_start_addr, function_starts_load_command.datasize, eByteOrderLittle); |
| } |
| } |
| } |
| #endif |
| |
| if (!data_was_read) |
| { |
| if (memory_module_load_level == eMemoryModuleLoadLevelComplete) |
| { |
| 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()); |
| // Load strings individually from memory when loading from memory since shared cache |
| // string tables contain strings for all symbols from all shared cached libraries |
| //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 (m_dysymtab.nindirectsyms != 0) |
| { |
| const addr_t indirect_syms_addr = linkedit_load_addr + m_dysymtab.indirectsymoff - linkedit_file_offset; |
| DataBufferSP indirect_syms_data_sp (ReadMemory (process_sp, indirect_syms_addr, m_dysymtab.nindirectsyms * 4)); |
| if (indirect_syms_data_sp) |
| indirect_symbol_index_data.SetData (indirect_syms_data_sp, 0, indirect_syms_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 |
| { |
| 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); |
| |
| if (dyld_info.export_size > 0) |
| { |
| dyld_trie_data.SetData (m_data, |
| dyld_info.export_off, |
| dyld_info.export_size); |
| } |
| |
| if (m_dysymtab.nindirectsyms != 0) |
| { |
| indirect_symbol_index_data.SetData (m_data, |
| m_dysymtab.indirectsymoff, |
| m_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); |
| } |
| } |
| |
| if (nlist_data.GetByteSize() == 0 && memory_module_load_level == eMemoryModuleLoadLevelComplete) |
| { |
| if (log) |
| module_sp->LogMessage(log, "failed to read nlist data"); |
| return 0; |
| } |
| |
| |
| const bool have_strtab_data = strtab_data.GetByteSize() > 0; |
| if (!have_strtab_data) |
| { |
| if (process) |
| { |
| if (strtab_addr == LLDB_INVALID_ADDRESS) |
| { |
| if (log) |
| module_sp->LogMessage(log, "failed to locate the strtab in memory"); |
| return 0; |
| } |
| } |
| else |
| { |
| if (log) |
| module_sp->LogMessage(log, "failed to read strtab data"); |
| return 0; |
| } |
| } |
| |
| const ConstString &g_segment_name_TEXT = GetSegmentNameTEXT(); |
| const ConstString &g_segment_name_DATA = GetSegmentNameDATA(); |
| const ConstString &g_segment_name_OBJC = GetSegmentNameOBJC(); |
| const 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 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); |
| |
| // 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; |
| 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, eRegisterKindGCC, true); |
| 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; |
| function_starts.Append(function_start_entry); |
| } |
| } |
| } |
| } |
| |
| const size_t function_starts_count = function_starts.GetSize(); |
| |
| const user_id_t TEXT_eh_frame_sectID = eh_frame_section_sp.get() ? eh_frame_section_sp->GetID() : NO_SECT; |
| |
| lldb::offset_t nlist_data_offset = 0; |
| |
| 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 std::map <uint32_t, uint32_t> NListIndexToSymbolIndexMap; |
| typedef std::map <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 = NULL; |
| |
| uint32_t sym_idx = 0; |
| Symbol *sym = NULL; |
| size_t num_syms = 0; |
| std::string memory_symbol_name; |
| uint32_t unmapped_local_symbols_found = 0; |
| |
| std::vector<TrieEntryWithOffset> trie_entries; |
| std::set<lldb::addr_t> resolver_addresses; |
| |
| if (dyld_trie_data.GetByteSize() > 0) |
| { |
| std::vector<llvm::StringRef> nameSlices; |
| ParseTrieEntries (dyld_trie_data, |
| 0, |
| nameSlices, |
| resolver_addresses, |
| trie_entries); |
| |
| ConstString text_segment_name ("__TEXT"); |
| SectionSP text_segment_sp = GetSectionList()->FindSectionByName(text_segment_name); |
| if (text_segment_sp) |
| { |
| const lldb::addr_t text_segment_file_addr = text_segment_sp->GetFileAddress(); |
| if (text_segment_file_addr != LLDB_INVALID_ADDRESS) |
| { |
| for (auto &e : trie_entries) |
| e.entry.address += text_segment_file_addr; |
| } |
| } |
| } |
| |
| #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__)) |
| |
| // 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 (m_header.flags & 0x80000000u) |
| { |
| // 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(header_arch); |
| char dsc_path[PATH_MAX]; |
| |
| snprintf(dsc_path, sizeof(dsc_path), "%s%s%s", |
| "/System/Library/Caches/com.apple.dyld/", /* IPHONE_DYLD_SHARED_CACHE_DIR */ |
| "dyld_shared_cache_", /* DYLD_SHARED_CACHE_BASE_NAME */ |
| header_arch.GetArchitectureName()); |
| |
| FileSpec dsc_filespec(dsc_path, false); |
| |
| // We need definitions of two structures in the on-disk DSC, copy them here manually |
| struct lldb_copy_dyld_cache_header_v0 |
| { |
| 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; // file offset of where local symbols are stored |
| uint64_t localSymbolsSize; // size of local symbols information |
| }; |
| 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 |
| }; |
| |
| struct lldb_copy_dyld_cache_mapping_info |
| { |
| uint64_t address; |
| uint64_t size; |
| uint64_t fileOffset; |
| uint32_t maxProt; |
| uint32_t initProt; |
| }; |
| |
| struct lldb_copy_dyld_cache_local_symbols_info |
| { |
| uint32_t nlistOffset; |
| uint32_t nlistCount; |
| uint32_t stringsOffset; |
| uint32_t stringsSize; |
| uint32_t entriesOffset; |
| uint32_t entriesCount; |
| }; |
| struct lldb_copy_dyld_cache_local_symbols_entry |
| { |
| uint32_t dylibOffset; |
| uint32_t nlistStartIndex; |
| uint32_t nlistCount; |
| }; |
| |
| /* The dyld_cache_header has a pointer to the dyld_cache_local_symbols_info structure (localSymbolsOffset). |
| The dyld_cache_local_symbols_info structure gives us three things: |
| 1. The start and count of the nlist records in the dyld_shared_cache file |
| 2. The start and size of the strings for these nlist records |
| 3. The start and count of dyld_cache_local_symbols_entry entries |
| |
| There is one dyld_cache_local_symbols_entry per dylib/framework in the dyld shared cache. |
| The "dylibOffset" field is the Mach-O header of this dylib/framework in the dyld shared cache. |
| The dyld_cache_local_symbols_entry also lists the start of this dylib/framework's nlist records |
| and the count of how many nlist records there are for this dylib/framework. |
| */ |
| |
| // Process the dsc header to find the unmapped symbols |
| // |
| // Save some VM space, do not map the entire cache in one shot. |
| |
| DataBufferSP dsc_data_sp; |
| dsc_data_sp = dsc_filespec.MemoryMapFileContents(0, sizeof(struct lldb_copy_dyld_cache_header_v1)); |
| |
| if (dsc_data_sp) |
| { |
| DataExtractor dsc_header_data(dsc_data_sp, byte_order, addr_byte_size); |
| |
| char version_str[17]; |
| int version = -1; |
| lldb::offset_t offset = 0; |
| memcpy (version_str, dsc_header_data.GetData (&offset, 16), 16); |
| version_str[16] = '\0'; |
| if (strncmp (version_str, "dyld_v", 6) == 0 && isdigit (version_str[6])) |
| { |
| int v; |
| if (::sscanf (version_str + 6, "%d", &v) == 1) |
| { |
| version = v; |
| } |
| } |
| |
| UUID dsc_uuid; |
| if (version >= 1) |
| { |
| offset = offsetof (struct lldb_copy_dyld_cache_header_v1, uuid); |
| uint8_t uuid_bytes[sizeof (uuid_t)]; |
| memcpy (uuid_bytes, dsc_header_data.GetData (&offset, sizeof (uuid_t)), sizeof (uuid_t)); |
| dsc_uuid.SetBytes (uuid_bytes); |
| } |
| |
| bool uuid_match = true; |
| if (dsc_uuid.IsValid() && process) |
| { |
| UUID shared_cache_uuid(GetProcessSharedCacheUUID(process)); |
| |
| if (shared_cache_uuid.IsValid() && dsc_uuid != shared_cache_uuid) |
| { |
| // The on-disk dyld_shared_cache file is not the same as the one in this |
| // process' memory, don't use it. |
| uuid_match = false; |
| ModuleSP module_sp (GetModule()); |
| if (module_sp) |
| module_sp->ReportWarning ("process shared cache does not match on-disk dyld_shared_cache file, some symbol names will be missing."); |
| } |
| } |
| |
| offset = offsetof (struct lldb_copy_dyld_cache_header_v1, mappingOffset); |
| |
| uint32_t mappingOffset = dsc_header_data.GetU32(&offset); |
| |
| // If the mappingOffset points to a location inside the header, we've |
| // opened an old dyld shared cache, and should not proceed further. |
| if (uuid_match && mappingOffset >= sizeof(struct lldb_copy_dyld_cache_header_v0)) |
| { |
| |
| DataBufferSP dsc_mapping_info_data_sp = dsc_filespec.MemoryMapFileContents(mappingOffset, sizeof (struct lldb_copy_dyld_cache_mapping_info)); |
| DataExtractor dsc_mapping_info_data(dsc_mapping_info_data_sp, byte_order, addr_byte_size); |
| offset = 0; |
| |
| // The File addresses (from the in-memory Mach-O load commands) for the shared libraries |
| // in the shared library cache need to be adjusted by an offset to match up with the |
| // dylibOffset identifying field in the dyld_cache_local_symbol_entry's. This offset is |
| // recorded in mapping_offset_value. |
| const uint64_t mapping_offset_value = dsc_mapping_info_data.GetU64(&offset); |
| |
| offset = offsetof (struct lldb_copy_dyld_cache_header_v1, localSymbolsOffset); |
| uint64_t localSymbolsOffset = dsc_header_data.GetU64(&offset); |
| uint64_t localSymbolsSize = dsc_header_data.GetU64(&offset); |
| |
| if (localSymbolsOffset && localSymbolsSize) |
| { |
| // Map the local symbols |
| if (DataBufferSP dsc_local_symbols_data_sp = dsc_filespec.MemoryMapFileContents(localSymbolsOffset, localSymbolsSize)) |
| { |
| DataExtractor dsc_local_symbols_data(dsc_local_symbols_data_sp, byte_order, addr_byte_size); |
| |
| offset = 0; |
| |
| // Read the local_symbols_infos struct in one shot |
| struct lldb_copy_dyld_cache_local_symbols_info local_symbols_info; |
| dsc_local_symbols_data.GetU32(&offset, &local_symbols_info.nlistOffset, 6); |
| |
| SectionSP text_section_sp(section_list->FindSectionByName(GetSegmentNameTEXT())); |
| |
| uint32_t header_file_offset = (text_section_sp->GetFileAddress() - mapping_offset_value); |
| |
| offset = local_symbols_info.entriesOffset; |
| for (uint32_t entry_index = 0; entry_index < local_symbols_info.entriesCount; entry_index++) |
| { |
| struct lldb_copy_dyld_cache_local_symbols_entry local_symbols_entry; |
| local_symbols_entry.dylibOffset = dsc_local_symbols_data.GetU32(&offset); |
| local_symbols_entry.nlistStartIndex = dsc_local_symbols_data.GetU32(&offset); |
| local_symbols_entry.nlistCount = dsc_local_symbols_data.GetU32(&offset); |
| |
| if (header_file_offset == local_symbols_entry.dylibOffset) |
| { |
| unmapped_local_symbols_found = local_symbols_entry.nlistCount; |
| |
| // 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(); |
| |
| nlist_data_offset = local_symbols_info.nlistOffset + (nlist_byte_size * local_symbols_entry.nlistStartIndex); |
| uint32_t string_table_offset = local_symbols_info.stringsOffset; |
| |
| for (uint32_t nlist_index = 0; nlist_index < local_symbols_entry.nlistCount; nlist_index++) |
| { |
| ///////////////////////////// |
| { |
| struct nlist_64 nlist; |
| if (!dsc_local_symbols_data.ValidOffsetForDataOfSize(nlist_data_offset, nlist_byte_size)) |
| break; |
| |
| nlist.n_strx = dsc_local_symbols_data.GetU32_unchecked(&nlist_data_offset); |
| nlist.n_type = dsc_local_symbols_data.GetU8_unchecked (&nlist_data_offset); |
| nlist.n_sect = dsc_local_symbols_data.GetU8_unchecked (&nlist_data_offset); |
| nlist.n_desc = dsc_local_symbols_data.GetU16_unchecked (&nlist_data_offset); |
| nlist.n_value = dsc_local_symbols_data.GetAddress_unchecked (&nlist_data_offset); |
| |
| SymbolType type = eSymbolTypeInvalid; |
| const char *symbol_name = dsc_local_symbols_data.PeekCStr(string_table_offset + 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 |
| Host::SystemLog (Host::eSystemLogError, |
| "error: DSC unmapped local symbol[%u] has invalid string table offset 0x%x in %s, ignoring symbol\n", |
| entry_index, |
| nlist.n_strx, |
| module_sp->GetFileSpec().GetPath().c_str()); |
| 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; |
| |
| 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. |
| |
| if (symbol_name && symbol_name[0] == '_' && symbol_name[1] == 'O' |
| && (strncmp (symbol_name, "_OBJC_IVAR_$_", strlen ("_OBJC_IVAR_$_")) == 0 |
| || strncmp (symbol_name, "_OBJC_CLASS_$_", strlen ("_OBJC_CLASS_$_")) == 0 |
| || strncmp (symbol_name, "_OBJC_METACLASS_$_", strlen ("_OBJC_METACLASS_$_")) == 0)) |
| add_nlist = false; |
| else |
| { |
| is_gsym = true; |
| sym[sym_idx].SetExternal(true); |
| 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); |
| type = 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, false); |
| if (!so_dir.Exists()) |
| { |
| so_dir.SetFile(&full_so_path[double_slash_pos + 1], false); |
| if (so_dir.Exists()) |
| { |
| // 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: // Fall through |
| case N_PBUD: // Fall through |
| case N_UNDF: |
| 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())) |
| { |
| if (symbol_sect_name && ::strstr (symbol_sect_name, "__objc") == symbol_sect_name) |
| { |
| type = eSymbolTypeRuntime; |
| |
| if (symbol_name && |
| symbol_name[0] == '_' && |
| symbol_name[1] == 'O' && |
| symbol_name[2] == 'B') |
| { |
| llvm::StringRef symbol_name_ref(symbol_name); |
| 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_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); |
| static const 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) |
| N_GSYM_name_to_sym_idx[sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled).GetCString()] = 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 &= 0xfffffffffffffffeull; |
| } |
| |
| 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 &= 0xfffffffffffffffeull; |
| 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 |
| 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) |
| { |
| bool found_it = false; |
| 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(); |
| 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) |
| { |
| // 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) |
| { |
| bool found_it = false; |
| 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(); |
| found_it = true; |
| break; |
| } |
| } |
| if (found_it) |
| continue; |
| } |
| else |
| { |
| // Combine N_GSYM stab entries with the non stab symbol |
| ConstNameToSymbolIndexMap::const_iterator pos = N_GSYM_name_to_sym_idx.find(sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled).GetCString()); |
| 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].GetAddress().SetSection (symbol_section); |
| sym[GSYM_sym_idx].GetAddress().SetOffset (symbol_value); |
| // 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[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); |
| sym[sym_idx].GetAddress().SetSection (symbol_section); |
| sym[sym_idx].GetAddress().SetOffset (symbol_value); |
| 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(); |
| } |
| |
| } |
| ///////////////////////////// |
| } |
| break; // No more entries to consider |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| // Must reset this in case it was mutated above! |
| nlist_data_offset = 0; |
| #endif |
| |
| if (nlist_data.GetByteSize() > 0) |
| { |
| |
| // If the sym array was not created while parsing the DSC unmapped |
| // symbols, create it now. |
| if (sym == NULL) |
| { |
| 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; |
| } |
| |
| for (; nlist_idx < symtab_load_command.nsyms; ++nlist_idx) |
| { |
| struct nlist_64 nlist; |
| if (!nlist_data.ValidOffsetForDataOfSize(nlist_data_offset, nlist_byte_size)) |
| break; |
| |
| 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); |
| |
| SymbolType type = eSymbolTypeInvalid; |
| const char *symbol_name = NULL; |
| |
| if (have_strtab_data) |
| { |
| symbol_name = strtab_data.PeekCStr(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 |
| Host::SystemLog (Host::eSystemLogError, |
| "error: symbol[%u] has invalid string table offset 0x%x in %s, ignoring symbol\n", |
| nlist_idx, |
| nlist.n_strx, |
| module_sp->GetFileSpec().GetPath().c_str()); |
| continue; |
| } |
| if (symbol_name[0] == '\0') |
| symbol_name = NULL; |
| } |
| else |
| { |
| const addr_t str_addr = strtab_addr + nlist.n_strx; |
| Error str_error; |
| if (process->ReadCStringFromMemory(str_addr, memory_symbol_name, str_error)) |
| symbol_name = memory_symbol_name.c_str(); |
| } |
| const char *symbol_name_non_abi_mangled = NULL; |
| |
| SectionSP symbol_section; |
| lldb::addr_t symbol_byte_size = 0; |
| bool add_nlist = true; |
| bool is_gsym = false; |
| bool is_debug = ((nlist.n_type & N_STAB) != 0); |
| bool demangled_is_synthesized = false; |
| |
| 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. |
| |
| if (symbol_name && symbol_name[0] == '_' && symbol_name[1] == 'O' |
| && (strncmp (symbol_name, "_OBJC_IVAR_$_", strlen ("_OBJC_IVAR_$_")) == 0 |
| || strncmp (symbol_name, "_OBJC_CLASS_$_", strlen ("_OBJC_CLASS_$_")) == 0 |
| || strncmp (symbol_name, "_OBJC_METACLASS_$_", strlen ("_OBJC_METACLASS_$_")) == 0)) |
| add_nlist = false; |
| else |
| { |
| is_gsym = true; |
| sym[sym_idx].SetExternal(true); |
| 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); |
| type = 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, false); |
| if (!so_dir.Exists()) |
| { |
| so_dir.SetFile(&full_so_path[double_slash_pos + 1], false); |
| if (so_dir.Exists()) |
| { |
| // 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:// Fall through |
| case N_PBUD:// Fall through |
| case N_UNDF: |
| 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())) |
| { |
| if (symbol_sect_name && ::strstr (symbol_sect_name, "__objc") == symbol_sect_name) |
| { |
| type = eSymbolTypeRuntime; |
| |
| if (symbol_name && |
| symbol_name[0] == '_' && |
| symbol_name[1] == 'O' && |
| symbol_name[2] == 'B') |
| { |
| llvm::StringRef symbol_name_ref(symbol_name); |
| 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_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); |
| static const 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) |
| { |
| N_GSYM_name_to_sym_idx[sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled).GetCString()] = 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; |
| if (is_arm) |
| symbol_file_addr &= 0xfffffffffffffffeull; |
| |
| 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 &= 0xfffffffffffffffeull; |
| 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 |
| 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) |
| { |
| bool found_it = false; |
| 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(); |
| 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) |
| { |
| // 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) |
| { |
| bool found_it = false; |
| 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(); |
| found_it = true; |
| break; |
| } |
| } |
| if (found_it) |
| continue; |
| } |
| else |
| { |
| // Combine N_GSYM stab entries with the non stab symbol |
| ConstNameToSymbolIndexMap::const_iterator pos = N_GSYM_name_to_sym_idx.find(sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled).GetCString()); |
| 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].GetAddress().SetSection (symbol_section); |
| sym[GSYM_sym_idx].GetAddress().SetOffset (symbol_value); |
| // 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[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); |
| sym[sym_idx].GetAddress().SetSection (symbol_section); |
| sym[sym_idx].GetAddress().SetOffset (symbol_value); |
| 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(); |
| } |
| } |
| } |
| |
| uint32_t synthetic_sym_id = symtab_load_command.nsyms; |
| |
| if (function_starts_count > 0) |
| { |
| char synthetic_function_symbol[PATH_MAX]; |
| uint32_t num_synthetic_function_symbols = 0; |
| for (i=0; i<function_starts_count; ++i) |
| { |
| if (function_starts.GetEntryRef (i).data == false) |
| ++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); |
| } |
| uint32_t synthetic_function_symbol_idx = 0; |
| for (i=0; i<function_starts_count; ++i) |
| { |
| const FunctionStarts::Entry *func_start_entry = function_starts.GetEntryAtIndex (i); |
| if (func_start_entry->data == false) |
| { |
| 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 &= 0xfffffffffffffffeull; |
| } |
| 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 &= 0xfffffffffffffffeull; |
| 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; |
| } |
| snprintf (synthetic_function_symbol, |
| sizeof(synthetic_function_symbol), |
| "___lldb_unnamed_function%u$$%s", |
| ++synthetic_function_symbol_idx, |
| module_sp->GetFileSpec().GetFilename().GetCString()); |
| sym[sym_idx].SetID (synthetic_sym_id++); |
| sym[sym_idx].GetMangled().SetDemangledName(ConstString(synthetic_function_symbol)); |
| sym[sym_idx].SetType (eSymbolTypeCode); |
| sym[sym_idx].SetIsSynthetic (true); |
| sym[sym_idx].GetAddress() = symbol_addr; |
| 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 = NULL; |
| 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->GetAddress() = 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 = NULL; // 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].GetAddress() = so_addr; |
| 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 (!trie_entries.empty()) |
| { |
| for (const auto &e : trie_entries) |
| { |
| if (e.entry.import_name) |
| { |
| // 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; |
| } |
| } |
| } |
| |
| |
| |
| // StreamFile s(stdout, false); |
| // s.Printf ("Symbol table before CalculateSymbolSizes():\n"); |
| // symtab->Dump(&s, NULL, eSortOrderNone); |
| // Set symbol byte sizes correctly since mach-o nlist entries don't have sizes |
| symtab->CalculateSymbolSizes(); |
| |
| // s.Printf ("Symbol table after CalculateSymbolSizes():\n"); |
| // symtab->Dump(&s, NULL, eSortOrderNone); |
| |
| return symtab->GetNumSymbols(); |
| } |
| return 0; |
| } |
| |
| |
| void |
| ObjectFileMachO::Dump (Stream *s) |
| { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) |
| { |
| lldb_private::Mutex::Locker locker(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"); |
| |
| ArchSpec header_arch; |
| GetArchitecture(header_arch); |
| |
| *s << ", file = '" << m_file << "', arch = " << header_arch.GetArchitectureName() << "\n"; |
| |
| SectionList *sections = GetSectionList(); |
| if (sections) |
| sections->Dump(s, NULL, true, UINT32_MAX); |
| |
| if (m_symtab_ap.get()) |
| m_symtab_ap->Dump(s, NULL, eSortOrderNone); |
| } |
| } |
| |
| bool |
| ObjectFileMachO::GetUUID (const llvm::MachO::mach_header &header, |
| const lldb_private::DataExtractor &data, |
| lldb::offset_t lc_offset, |
| lldb_private::UUID& uuid) |
| { |
| uint32_t i; |
| struct 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) == NULL) |
| 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 false; |
| |
| uuid.SetBytes (uuid_bytes); |
| return true; |
| } |
| return false; |
| } |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| return false; |
| } |
| |
| |
| bool |
| ObjectFileMachO::GetArchitecture (const llvm::MachO::mach_header &header, |
| const lldb_private::DataExtractor &data, |
| lldb::offset_t lc_offset, |
| ArchSpec &arch) |
| { |
| arch.SetArchitecture (eArchTypeMachO, header.cputype, header.cpusubtype); |
| |
| if (arch.IsValid()) |
| { |
| llvm::Triple &triple = arch.GetTriple(); |
| if (header.filetype == MH_PRELOAD) |
| { |
| // Set OS to "unknown" - this is a standalone binary with no dyld et al |
| triple.setOS(llvm::Triple::UnknownOS); |
| return true; |
| } |
| else |
| { |
| struct load_command load_cmd; |
| |
| 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) == NULL) |
| break; |
| |
| switch (load_cmd.cmd) |
| { |
| case LC_VERSION_MIN_IPHONEOS: |
| triple.setOS (llvm::Triple::IOS); |
| return true; |
| |
| case LC_VERSION_MIN_MACOSX: |
| triple.setOS (llvm::Triple::MacOSX); |
| return true; |
| |
| default: |
| break; |
| } |
| |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| |
| if (header.cputype == CPU_TYPE_ARM || header.cputype == CPU_TYPE_ARM64) |
| triple.setOS (llvm::Triple::IOS); |
| else |
| triple.setOS (llvm::Triple::MacOSX); |
| } |
| } |
| return arch.IsValid(); |
| } |
| |
| bool |
| ObjectFileMachO::GetUUID (lldb_private::UUID* uuid) |
| { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) |
| { |
| lldb_private::Mutex::Locker locker(module_sp->GetMutex()); |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| return GetUUID (m_header, m_data, offset, *uuid); |
| } |
| return false; |
| } |
| |
| |
| uint32_t |
| ObjectFileMachO::GetDependentModules (FileSpecList& files) |
| { |
| uint32_t count = 0; |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) |
| { |
| lldb_private::Mutex::Locker locker(module_sp->GetMutex()); |
| struct load_command load_cmd; |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| const bool resolve_path = false; // Don't resolve the dependent file paths since they may not reside on this system |
| 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) == NULL) |
| break; |
| |
| switch (load_cmd.cmd) |
| { |
| 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); |
| // Skip any path that starts with '@' since these are usually: |
| // @executable_path/.../file |
| // @rpath/.../file |
| if (path && path[0] != '@') |
| { |
| FileSpec file_spec(path, resolve_path); |
| if (files.AppendIfUnique(file_spec)) |
| count++; |
| } |
| } |
| break; |
| |
| default: |
| break; |
| } |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| } |
| 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() || 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) |
| { |
| lldb_private::Mutex::Locker locker(module_sp->GetMutex()); |
| struct 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) == NULL) |
| 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) // ARM_THREAD_STATE 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: |
| 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; |
| } |
| } |
| |
| default: |
| break; |
| } |
| if (done) |
| break; |
| |
| // Go to the next load command: |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| |
| 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; |
| if (module_sp->FindSymbolsWithNameAndType(ConstString ("start"), eSymbolTypeCode, contexts)) |
| { |
| if (contexts.GetContextAtIndex(0, context)) |
| m_entry_point_address = context.symbol->GetAddress(); |
| } |
| } |
| } |
| } |
| |
| return m_entry_point_address; |
| |
| } |
| |
| lldb_private::Address |
| ObjectFileMachO::GetHeaderAddress () |
| { |
| 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) |
| { |
| lldb_private::Mutex::Locker locker(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; |
| 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) == NULL) |
| 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(); |
| } |
| |
| lldb::RegisterContextSP |
| ObjectFileMachO::GetThreadContextAtIndex (uint32_t idx, lldb_private::Thread &thread) |
| { |
| lldb::RegisterContextSP reg_ctx_sp; |
| |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) |
| { |
| lldb_private::Mutex::Locker locker(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: |
| reg_ctx_sp.reset (new RegisterContextDarwin_arm64_Mach (thread, data)); |
| break; |
| |
| case llvm::MachO::CPU_TYPE_ARM: |
| reg_ctx_sp.reset (new RegisterContextDarwin_arm_Mach (thread, data)); |
| break; |
| |
| case llvm::MachO::CPU_TYPE_I386: |
| reg_ctx_sp.reset (new RegisterContextDarwin_i386_Mach (thread, data)); |
| break; |
| |
| case llvm::MachO::CPU_TYPE_X86_64: |
| reg_ctx_sp.reset (new 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. |
| UUID uuid; |
| if (GetUUID(&uuid)) |
| { |
| // 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. |
| UUID uuid; |
| if (GetUUID(&uuid)) |
| { |
| // 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; |
| } |
| |
| |
| uint32_t |
| ObjectFileMachO::GetVersion (uint32_t *versions, uint32_t num_versions) |
| { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) |
| { |
| lldb_private::Mutex::Locker locker(module_sp->GetMutex()); |
| struct 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) == NULL) |
| 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) == NULL) |
| 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) |
| { |
| if (versions != NULL && num_versions > 0) |
| { |
| if (num_versions > 0) |
| versions[0] = (version & 0xFFFF0000ull) >> 16; |
| if (num_versions > 1) |
| versions[1] = (version & 0x0000FF00ull) >> 8; |
| if (num_versions > 2) |
| versions[2] = (version & 0x000000FFull); |
| // Fill in an remaining version numbers with invalid values |
| for (i=3; i<num_versions; ++i) |
| versions[i] = UINT32_MAX; |
| } |
| // The LC_ID_DYLIB load command has a version with 3 version numbers |
| // in it, so always return 3 |
| return 3; |
| } |
| } |
| return false; |
| } |
| |
| bool |
| ObjectFileMachO::GetArchitecture (ArchSpec &arch) |
| { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) |
| { |
| lldb_private::Mutex::Locker locker(module_sp->GetMutex()); |
| return GetArchitecture (m_header, m_data, MachHeaderSizeFromMagic(m_header.magic), arch); |
| } |
| return false; |
| } |
| |
| |
| UUID |
| ObjectFileMachO::GetProcessSharedCacheUUID (Process *process) |
| { |
| UUID uuid; |
| if (process) |
| { |
| addr_t all_image_infos = process->GetImageInfoAddress(); |
| |
| // The address returned by GetImageInfoAddress may be the address of dyld (don't want) |
| // or it may be the address of the dyld_all_image_infos structure (want). The first four |
| // bytes will be either the version field (all_image_infos) or a Mach-O file magic constant. |
| // Version 13 and higher of dyld_all_image_infos is required to get the sharedCacheUUID field. |
| |
| Error err; |
| uint32_t version_or_magic = process->ReadUnsignedIntegerFromMemory (all_image_infos, 4, -1, err); |
| if (version_or_magic != static_cast<uint32_t>(-1) |
| && version_or_magic != MH_MAGIC |
| && version_or_magic != MH_CIGAM |
| && version_or_magic != MH_MAGIC_64 |
| && version_or_magic != MH_CIGAM_64 |
| && version_or_magic >= 13) |
| { |
| addr_t sharedCacheUUID_address = LLDB_INVALID_ADDRESS; |
| int wordsize = process->GetAddressByteSize(); |
| if (wordsize == 8) |
| { |
| sharedCacheUUID_address = all_image_infos + 160; // sharedCacheUUID <mach-o/dyld_images.h> |
| } |
| if (wordsize == 4) |
| { |
| sharedCacheUUID_address = all_image_infos + 84; // sharedCacheUUID <mach-o/dyld_images.h> |
| } |
| if (sharedCacheUUID_address != LLDB_INVALID_ADDRESS) |
| { |
| uuid_t shared_cache_uuid; |
| if (process->ReadMemory (sharedCacheUUID_address, shared_cache_uuid, sizeof (uuid_t), err) == sizeof (uuid_t)) |
| { |
| uuid.SetBytes (shared_cache_uuid); |
| } |
| } |
| } |
| } |
| return uuid; |
| } |
| |
| UUID |
| ObjectFileMachO::GetLLDBSharedCacheUUID () |
| { |
| UUID uuid; |
| #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__)) |
| 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> |
| } |
| else |
| { |
| sharedCacheUUID_address = (uuid_t*) ((uint8_t*) dyld_all_image_infos_address + 84); // sharedCacheUUID <mach-o/dyld_images.h> |
| } |
| uuid.SetBytes (sharedCacheUUID_address); |
| } |
| } |
| } |
| #endif |
| return uuid; |
| } |
| |
| uint32_t |
| ObjectFileMachO::GetMinimumOSVersion (uint32_t *versions, uint32_t num_versions) |
| { |
| if (m_min_os_versions.empty()) |
| { |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| bool success = false; |
| for (uint32_t i=0; success == false && i < m_header.ncmds; ++i) |
| { |
| const lldb::offset_t load_cmd_offset = offset; |
| |
| version_min_command lc; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL) |
| break; |
| if (lc.cmd == LC_VERSION_MIN_MACOSX || lc.cmd == LC_VERSION_MIN_IPHONEOS) |
| { |
| 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_versions.push_back(xxxx); |
| if (yy) |
| { |
| m_min_os_versions.push_back(yy); |
| if (zz) |
| m_min_os_versions.push_back(zz); |
| } |
| } |
| success = true; |
| } |
| } |
| offset = load_cmd_offset + lc.cmdsize; |
| } |
| |
| if (success == false) |
| { |
| // Push an invalid value so we don't keep trying to |
| m_min_os_versions.push_back(UINT32_MAX); |
| } |
| } |
| |
| if (m_min_os_versions.size() > 1 || m_min_os_versions[0] != UINT32_MAX) |
| { |
| if (versions != NULL && num_versions > 0) |
| { |
| for (size_t i=0; i<num_versions; ++i) |
| { |
| if (i < m_min_os_versions.size()) |
| versions[i] = m_min_os_versions[i]; |
| else |
| versions[i] = 0; |
| } |
| } |
| return m_min_os_versions.size(); |
| } |
| // Call the superclasses version that will empty out the data |
| return ObjectFile::GetMinimumOSVersion (versions, num_versions); |
| } |
| |
| uint32_t |
| ObjectFileMachO::GetSDKVersion(uint32_t *versions, uint32_t num_versions) |
| { |
| if (m_sdk_versions.empty()) |
| { |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| bool success = false; |
| for (uint32_t i=0; success == false && i < m_header.ncmds; ++i) |
| { |
| const lldb::offset_t load_cmd_offset = offset; |
| |
| version_min_command lc; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL) |
| break; |
| if (lc.cmd == LC_VERSION_MIN_MACOSX || lc.cmd == LC_VERSION_MIN_IPHONEOS) |
| { |
| if (m_data.GetU32 (&offset, &lc.version, (sizeof(lc) / sizeof(uint32_t)) - 2)) |
| { |
| const uint32_t xxxx = lc.reserved >> 16; |
| const uint32_t yy = (lc.reserved >> 8) & 0xffu; |
| const uint32_t zz = lc.reserved & 0xffu; |
| if (xxxx) |
| { |
| m_sdk_versions.push_back(xxxx); |
| if (yy) |
| { |
| m_sdk_versions.push_back(yy); |
| if (zz) |
| m_sdk_versions.push_back(zz); |
| } |
| } |
| success = true; |
| } |
| } |
| offset = load_cmd_offset + lc.cmdsize; |
| } |
| |
| if (success == false) |
| { |
| // Push an invalid value so we don't keep trying to |
| m_sdk_versions.push_back(UINT32_MAX); |
| } |
| } |
| |
| if (m_sdk_versions.size() > 1 || m_sdk_versions[0] != UINT32_MAX) |
| { |
| if (versions != NULL && num_versions > 0) |
| { |
| for (size_t i=0; i<num_versions; ++i) |
| { |
| if (i < m_sdk_versions.size()) |
| versions[i] = m_sdk_versions[i]; |
| else |
| versions[i] = 0; |
| } |
| } |
| return m_sdk_versions.size(); |
| } |
| // Call the superclasses version that will empty out the data |
| return ObjectFile::GetSDKVersion (versions, num_versions); |
| } |
| |
| |
| //------------------------------------------------------------------ |
| // PluginInterface protocol |
| //------------------------------------------------------------------ |
| lldb_private::ConstString |
| ObjectFileMachO::GetPluginName() |
| { |
| return GetPluginNameStatic(); |
| } |
| |
| uint32_t |
| ObjectFileMachO::GetPluginVersion() |
| { |
| return 1; |
| } |
| |
| |
| bool |
| ObjectFileMachO::SetLoadAddress (Target &target, |
| lldb::addr_t value, |
| bool value_is_offset) |
| { |
| bool changed = false; |
| ModuleSP module_sp = GetModule(); |
| if (module_sp) |
| { |
| size_t num_loaded_sections = 0; |
| SectionList *section_list = GetSectionList (); |
| if (section_list) |
| { |
| lldb::addr_t mach_base_file_addr = LLDB_INVALID_ADDRESS; |
| const size_t num_sections = section_list->GetSize(); |
| |
| const bool is_memory_image = (bool)m_process_wp.lock(); |
| const Strata strata = GetStrata(); |
| static ConstString g_linkedit_segname ("__LINKEDIT"); |
| 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 (section_sp && |
| section_sp->GetFileSize() > 0 && |
| section_sp->IsThreadSpecific() == false && |
| module_sp.get() == section_sp->GetModule().get()) |
| { |
| // Ignore __LINKEDIT and __DWARF segments |
| if (section_sp->GetName() == g_linkedit_segname) |
| { |
| // Only map __LINKEDIT if we have an in memory image and this isn't |
| // a kernel binary like a kext or mach_kernel. |
| if (is_memory_image == false || strata == eStrataKernel) |
| continue; |
| } |
| 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 |
| |
| // First find the address of the mach header which is the first non-zero |
| // file sized section whose file offset is zero as this will be subtracted |
| // from each other valid section's vmaddr and then get "base_addr" added to |
| // it when loading the module in the target |
| for (size_t sect_idx = 0; |
| sect_idx < num_sections && mach_base_file_addr == LLDB_INVALID_ADDRESS; |
| ++sect_idx) |
| { |
| // Iterate through the object file sections to find all |
| // of the sections that size on disk (to avoid __PAGEZERO) |
| // and load them |
| Section *section = section_list->GetSectionAtIndex (sect_idx).get(); |
| if (section && |
| section->GetFileSize() > 0 && |
| section->GetFileOffset() == 0 && |
| section->IsThreadSpecific() == false && |
| module_sp.get() == section->GetModule().get()) |
| { |
| // Ignore __LINKEDIT and __DWARF segments |
| if (section->GetName() == g_linkedit_segname) |
| { |
| // Only map __LINKEDIT if we have an in memory image and this isn't |
| // a kernel binary like a kext or mach_kernel. |
| if (is_memory_image == false || strata == eStrataKernel) |
| continue; |
| } |
| mach_base_file_addr = section->GetFileAddress(); |
| } |
| } |
| |
| if (mach_base_file_addr != LLDB_INVALID_ADDRESS) |
| { |
| 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 (section_sp && |
| section_sp->GetFileSize() > 0 && |
| section_sp->IsThreadSpecific() == false && |
| module_sp.get() == section_sp->GetModule().get()) |
| { |
| // Ignore __LINKEDIT and __DWARF segments |
| if (section_sp->GetName() == g_linkedit_segname) |
| { |
| // Only map __LINKEDIT if we have an in memory image and this isn't |
| // a kernel binary like a kext or mach_kernel. |
| if (is_memory_image == false || strata == eStrataKernel) |
| continue; |
| } |
| if (target.GetSectionLoadList().SetSectionLoadAddress (section_sp, section_sp->GetFileAddress() - mach_base_file_addr + value)) |
| ++num_loaded_sections; |
| } |
| } |
| } |
| } |
| } |
| changed = num_loaded_sections > 0; |
| return num_loaded_sections > 0; |
| } |
| return changed; |
| } |
| |
| bool |
| ObjectFileMachO::SaveCore (const lldb::ProcessSP &process_sp, |
| const FileSpec &outfile, |
| Error &error) |
| { |
| if (process_sp) |
| { |
| 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)) |
| { |
| bool make_core = false; |
| switch (target_arch.GetMachine()) |
| { |
| case llvm::Triple::arm: |
| 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<segment_command_64> segment_load_commands; |
| // uint32_t range_info_idx = 0; |
| MemoryRegionInfo range_info; |
| Error range_error = process_sp->GetMemoryRegionInfo(0, range_info); |
| if (range_error.Success()) |
| { |
| while (range_info.GetRange().GetRangeBase() != LLDB_INVALID_ADDRESS) |
| { |
| const addr_t addr = range_info.GetRange().GetRangeBase(); |
| const addr_t size = range_info.GetRange().GetByteSize(); |
| |
| if (size == 0) |
| break; |
| |
| // 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; |
| |
| // printf ("[%3u] [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ") %c%c%c\n", |
| // range_info_idx, |
| // addr, |
| // size, |
| // (prot & VM_PROT_READ ) ? 'r' : '-', |
| // (prot & VM_PROT_WRITE ) ? 'w' : '-', |
| // (prot & VM_PROT_EXECUTE) ? 'x' : '-'); |
| |
| if (prot != 0) |
| { |
| segment_command_64 segment = { |
| LC_SEGMENT_64, // uint32_t cmd; |
| sizeof(segment), // uint32_t cmdsize; |
| {0}, // char segname[16]; |
| addr, // uint64_t vmaddr; |
| size, // uint64_t vmsize; |
| 0, // uint64_t fileoff; |
| size, // uint64_t filesize; |
| prot, // uint32_t maxprot; |
| prot, // uint32_t initprot; |
| 0, // uint32_t nsects; |
| 0 }; // uint32_t flags; |
| segment_load_commands.push_back(segment); |
| } |
| else |
| { |
| // No protections and a size of 1 used to be returned from old |
| // debugservers when we asked about a region that was past the |
| // last memory region and it indicates the end... |
| if (size == 1) |
| break; |
| } |
| |
| range_error = process_sp->GetMemoryRegionInfo(range_info.GetRange().GetRangeEnd(), range_info); |
| if (range_error.Fail()) |
| break; |
| } |
| |
| const uint32_t addr_byte_size = target_arch.GetAddressByteSize(); |
| const ByteOrder byte_order = target_arch.GetByteOrder(); |
| StreamString buffer (Stream::eBinary, |
| addr_byte_size, |
| byte_order); |
| |
| mach_header_64 mach_header; |
| mach_header.magic = MH_MAGIC_64; |
| 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_ARM: |
| //RegisterContextDarwin_arm_Mach::Create_LC_THREAD (thread_sp.get(), thread_load_commands); |
| break; |
| |
| case llvm::MachO::CPU_TYPE_I386: |
| //RegisterContextDarwin_i386_Mach::Create_LC_THREAD (thread_sp.get(), thread_load_commands); |
| 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... |
| mach_header.sizeofcmds = segment_load_commands.size() * segment_load_commands[0].cmdsize; |
| |
| // and the size of all LC_THREAD load command |
| for (const auto &LC_THREAD_data : LC_THREAD_datas) |
| { |
| mach_header.sizeofcmds += 8 + LC_THREAD_data.GetSize(); |
| } |
| |
| printf ("mach_header: 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x\n", |
| mach_header.magic, |
| mach_header.cputype, |
| mach_header.cpusubtype, |
| mach_header.filetype, |
| mach_header.ncmds, |
| mach_header.sizeofcmds, |
| mach_header.flags, |
| mach_header.reserved); |
| |
| // 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); |
| 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; |
| if (file_offset & 0x00000fff) |
| { |
| file_offset += 0x00001000ull; |
| file_offset &= (~0x00001000ull + 1); |
| } |
| |
| 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.GetData(), LC_THREAD_data_size); |
| } |
| |
| // Write out all of the segment load commands |
| for (const auto &segment : segment_load_commands) |
| { |
| printf ("0x%8.8x 0x%8.8x [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ") [0x%16.16" PRIx64 " 0x%16.16" PRIx64 ") 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x]\n", |
| segment.cmd, |
| segment.cmdsize, |
| segment.vmaddr, |
| segment.vmaddr + segment.vmsize, |
| segment.fileoff, |
| segment.filesize, |
| segment.maxprot, |
| segment.initprot, |
| segment.nsects, |
| segment.flags); |
| |
| buffer.PutHex32(segment.cmd); |
| buffer.PutHex32(segment.cmdsize); |
| buffer.PutRawBytes(segment.segname, sizeof(segment.segname)); |
| buffer.PutHex64(segment.vmaddr); |
| buffer.PutHex64(segment.vmsize); |
| buffer.PutHex64(segment.fileoff); |
| buffer.PutHex64(segment.filesize); |
| buffer.PutHex32(segment.maxprot); |
| buffer.PutHex32(segment.initprot); |
| buffer.PutHex32(segment.nsects); |
| buffer.PutHex32(segment.flags); |
| } |
| |
| File core_file; |
| std::string core_file_path(outfile.GetPath()); |
| error = core_file.Open(core_file_path.c_str(), |
| File::eOpenOptionWrite | |
| File::eOpenOptionTruncate | |
| File::eOpenOptionCanCreate); |
| if (error.Success()) |
| { |
| // 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.Write(buffer.GetString().data(), bytes_written); |
| if (error.Success()) |
| { |
| // Now write the file data for all memory segments in the process |
| for (const auto &segment : segment_load_commands) |
| { |
| if (segment.fileoff != core_file.SeekFromStart(segment.fileoff)) |
| { |
| error.SetErrorStringWithFormat("unable to seek to offset 0x%" PRIx64 " in '%s'", segment.fileoff, core_file_path.c_str()); |
| break; |
| } |
| |
| printf ("Saving data for segment at 0x%" PRIx64 "\n", segment.vmaddr); |
| addr_t bytes_left = segment.vmsize; |
| addr_t addr = segment.vmaddr; |
| Error memory_read_error; |
| while (bytes_left > 0 && error.Success()) |
| { |
| const size_t bytes_to_read = bytes_left > sizeof(bytes) ? sizeof(bytes) : bytes_left; |
| const size_t bytes_read = process_sp->ReadMemory(addr, bytes, bytes_to_read, memory_read_error); |
| if (bytes_read == bytes_to_read) |
| { |
| size_t bytes_written = bytes_read; |
| error = core_file.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.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; |
| } |
| |