| //===-- PlatformLinux.cpp -------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "PlatformLinux.h" |
| #include "lldb/Host/Config.h" |
| |
| #include <cstdio> |
| #if LLDB_ENABLE_POSIX |
| #include <sys/utsname.h> |
| #endif |
| |
| #include "Plugins/Process/Utility/LinuxSignals.h" |
| #include "Plugins/Process/Utility/lldb-riscv-register-enums.h" |
| #include "Utility/ARM64_DWARF_Registers.h" |
| #include "lldb/Core/Debugger.h" |
| #include "lldb/Core/PluginManager.h" |
| #include "lldb/Host/HostInfo.h" |
| #include "lldb/Symbol/UnwindPlan.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Utility/ArchSpec.h" |
| #include "lldb/Utility/FileSpec.h" |
| #include "lldb/Utility/LLDBLog.h" |
| #include "lldb/Utility/Log.h" |
| #include "lldb/Utility/State.h" |
| #include "lldb/Utility/Status.h" |
| #include "lldb/Utility/StreamString.h" |
| |
| // Define these constants from Linux mman.h for use when targeting remote linux |
| // systems even when host has different values. |
| #define MAP_PRIVATE 2 |
| #define MAP_ANON 0x20 |
| |
| // For other platforms that use platform linux |
| #ifndef SIGILL |
| #define SIGILL 4 |
| #endif |
| #ifndef SIGBUS |
| #define SIGBUS 7 |
| #endif |
| #ifndef SIGFPE |
| #define SIGFPE 8 |
| #endif |
| #ifndef SIGSEGV |
| #define SIGSEGV 11 |
| #endif |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| using namespace lldb_private::platform_linux; |
| |
| LLDB_PLUGIN_DEFINE(PlatformLinux) |
| |
| static uint32_t g_initialize_count = 0; |
| |
| |
| PlatformSP PlatformLinux::CreateInstance(bool force, const ArchSpec *arch) { |
| Log *log = GetLog(LLDBLog::Platform); |
| LLDB_LOG(log, "force = {0}, arch=({1}, {2})", force, |
| arch ? arch->GetArchitectureName() : "<null>", |
| arch ? arch->GetTriple().getTriple() : "<null>"); |
| |
| bool create = force; |
| if (!create && arch && arch->IsValid()) { |
| const llvm::Triple &triple = arch->GetTriple(); |
| switch (triple.getOS()) { |
| case llvm::Triple::Linux: |
| create = true; |
| break; |
| |
| #if defined(__linux__) |
| // Only accept "unknown" for the OS if the host is linux and it "unknown" |
| // wasn't specified (it was just returned because it was NOT specified) |
| case llvm::Triple::OSType::UnknownOS: |
| create = !arch->TripleOSWasSpecified(); |
| break; |
| #endif |
| default: |
| break; |
| } |
| } |
| |
| LLDB_LOG(log, "create = {0}", create); |
| if (create) { |
| return PlatformSP(new PlatformLinux(false)); |
| } |
| return PlatformSP(); |
| } |
| |
| llvm::StringRef PlatformLinux::GetPluginDescriptionStatic(bool is_host) { |
| if (is_host) |
| return "Local Linux user platform plug-in."; |
| return "Remote Linux user platform plug-in."; |
| } |
| |
| void PlatformLinux::Initialize() { |
| PlatformPOSIX::Initialize(); |
| |
| if (g_initialize_count++ == 0) { |
| #if defined(__linux__) && !defined(__ANDROID__) |
| PlatformSP default_platform_sp(new PlatformLinux(true)); |
| default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture()); |
| Platform::SetHostPlatform(default_platform_sp); |
| #endif |
| PluginManager::RegisterPlugin( |
| PlatformLinux::GetPluginNameStatic(false), |
| PlatformLinux::GetPluginDescriptionStatic(false), |
| PlatformLinux::CreateInstance, nullptr); |
| } |
| } |
| |
| void PlatformLinux::Terminate() { |
| if (g_initialize_count > 0) { |
| if (--g_initialize_count == 0) { |
| PluginManager::UnregisterPlugin(PlatformLinux::CreateInstance); |
| } |
| } |
| |
| PlatformPOSIX::Terminate(); |
| } |
| |
| /// Default Constructor |
| PlatformLinux::PlatformLinux(bool is_host) |
| : PlatformPOSIX(is_host) // This is the local host platform |
| { |
| if (is_host) { |
| ArchSpec hostArch = HostInfo::GetArchitecture(HostInfo::eArchKindDefault); |
| m_supported_architectures.push_back(hostArch); |
| if (hostArch.GetTriple().isArch64Bit()) { |
| m_supported_architectures.push_back( |
| HostInfo::GetArchitecture(HostInfo::eArchKind32)); |
| } |
| } else { |
| m_supported_architectures = CreateArchList( |
| {llvm::Triple::x86_64, llvm::Triple::x86, llvm::Triple::arm, |
| llvm::Triple::aarch64, llvm::Triple::mips64, llvm::Triple::mips64, |
| llvm::Triple::hexagon, llvm::Triple::mips, llvm::Triple::mips64el, |
| llvm::Triple::mipsel, llvm::Triple::msp430, llvm::Triple::systemz, |
| llvm::Triple::loongarch64, llvm::Triple::ppc64le, |
| llvm::Triple::riscv64}, |
| llvm::Triple::Linux); |
| } |
| } |
| |
| std::vector<ArchSpec> |
| PlatformLinux::GetSupportedArchitectures(const ArchSpec &process_host_arch) { |
| if (m_remote_platform_sp) |
| return m_remote_platform_sp->GetSupportedArchitectures(process_host_arch); |
| return m_supported_architectures; |
| } |
| |
| void PlatformLinux::GetStatus(Stream &strm) { |
| Platform::GetStatus(strm); |
| |
| #if LLDB_ENABLE_POSIX |
| // Display local kernel information only when we are running in host mode. |
| // Otherwise, we would end up printing non-Linux information (when running on |
| // Mac OS for example). |
| if (IsHost()) { |
| struct utsname un; |
| |
| if (uname(&un)) |
| return; |
| |
| strm.Printf(" Kernel: %s\n", un.sysname); |
| strm.Printf(" Release: %s\n", un.release); |
| strm.Printf(" Version: %s\n", un.version); |
| } |
| #endif |
| } |
| |
| uint32_t |
| PlatformLinux::GetResumeCountForLaunchInfo(ProcessLaunchInfo &launch_info) { |
| uint32_t resume_count = 0; |
| |
| // Always resume past the initial stop when we use eLaunchFlagDebug |
| if (launch_info.GetFlags().Test(eLaunchFlagDebug)) { |
| // Resume past the stop for the final exec into the true inferior. |
| ++resume_count; |
| } |
| |
| // If we're not launching a shell, we're done. |
| const FileSpec &shell = launch_info.GetShell(); |
| if (!shell) |
| return resume_count; |
| |
| std::string shell_string = shell.GetPath(); |
| // We're in a shell, so for sure we have to resume past the shell exec. |
| ++resume_count; |
| |
| // Figure out what shell we're planning on using. |
| const char *shell_name = strrchr(shell_string.c_str(), '/'); |
| if (shell_name == nullptr) |
| shell_name = shell_string.c_str(); |
| else |
| shell_name++; |
| |
| if (strcmp(shell_name, "csh") == 0 || strcmp(shell_name, "tcsh") == 0 || |
| strcmp(shell_name, "zsh") == 0 || strcmp(shell_name, "sh") == 0) { |
| // These shells seem to re-exec themselves. Add another resume. |
| ++resume_count; |
| } |
| |
| return resume_count; |
| } |
| |
| bool PlatformLinux::CanDebugProcess() { |
| if (IsHost()) { |
| return true; |
| } else { |
| // If we're connected, we can debug. |
| return IsConnected(); |
| } |
| } |
| |
| void PlatformLinux::CalculateTrapHandlerSymbolNames() { |
| m_trap_handlers.push_back(ConstString("_sigtramp")); |
| m_trap_handlers.push_back(ConstString("__kernel_rt_sigreturn")); |
| m_trap_handlers.push_back(ConstString("__restore_rt")); |
| m_trap_handlers.push_back(ConstString("__vdso_rt_sigreturn")); |
| } |
| |
| static lldb::UnwindPlanSP GetAArch64TrapHandlerUnwindPlan(ConstString name) { |
| UnwindPlanSP unwind_plan_sp; |
| if (name != "__kernel_rt_sigreturn") |
| return unwind_plan_sp; |
| |
| UnwindPlan::Row row; |
| |
| // In the signal trampoline frame, sp points to an rt_sigframe[1], which is: |
| // - 128-byte siginfo struct |
| // - ucontext struct: |
| // - 8-byte long (uc_flags) |
| // - 8-byte pointer (uc_link) |
| // - 24-byte stack_t |
| // - 128-byte signal set |
| // - 8 bytes of padding because sigcontext has 16-byte alignment |
| // - sigcontext/mcontext_t |
| // [1] |
| // https://github.com/torvalds/linux/blob/master/arch/arm64/kernel/signal.c |
| int32_t offset = 128 + 8 + 8 + 24 + 128 + 8; |
| // Then sigcontext[2] is: |
| // - 8 byte fault address |
| // - 31 8 byte registers |
| // - 8 byte sp |
| // - 8 byte pc |
| // [2] |
| // https://github.com/torvalds/linux/blob/master/arch/arm64/include/uapi/asm/sigcontext.h |
| |
| // Skip fault address |
| offset += 8; |
| row.GetCFAValue().SetIsRegisterPlusOffset(arm64_dwarf::sp, offset); |
| |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x0, 0 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x1, 1 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x2, 2 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x3, 3 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x4, 4 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x5, 5 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x6, 6 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x7, 7 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x8, 8 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x9, 9 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x10, 10 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x11, 11 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x12, 12 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x13, 13 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x14, 14 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x15, 15 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x16, 16 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x17, 17 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x18, 18 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x19, 19 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x20, 20 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x21, 21 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x22, 22 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x23, 23 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x24, 24 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x25, 25 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x26, 26 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x27, 27 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x28, 28 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::fp, 29 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::x30, 30 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::sp, 31 * 8, false); |
| row.SetRegisterLocationToAtCFAPlusOffset(arm64_dwarf::pc, 32 * 8, false); |
| |
| // The sigcontext may also contain floating point and SVE registers. |
| // However this would require a dynamic unwind plan so they are not included |
| // here. |
| |
| unwind_plan_sp = std::make_shared<UnwindPlan>(eRegisterKindDWARF); |
| unwind_plan_sp->AppendRow(std::move(row)); |
| unwind_plan_sp->SetSourceName("AArch64 Linux sigcontext"); |
| unwind_plan_sp->SetSourcedFromCompiler(eLazyBoolYes); |
| // Because sp is the same throughout the function |
| unwind_plan_sp->SetUnwindPlanValidAtAllInstructions(eLazyBoolYes); |
| unwind_plan_sp->SetUnwindPlanForSignalTrap(eLazyBoolYes); |
| |
| return unwind_plan_sp; |
| } |
| |
| static lldb::UnwindPlanSP GetRISCVTrapHandlerUnwindPlan(ConstString name, |
| uint32_t fp_flags) { |
| if (name != "__vdso_rt_sigreturn") |
| return {}; |
| |
| UnwindPlan::Row row; |
| |
| // In the signal trampoline frame, sp points to an rt_sigframe[1], which is: |
| // - 128-byte siginfo struct |
| // - ucontext struct: |
| // - 8-byte long (uc_flags) |
| // - 8-byte pointer (*uc_link) |
| // - 24-byte struct (uc_stack) |
| // - 8-byte struct (uc_sigmask) |
| // - 120-byte of padding to allow sigset_t to be expanded in the future |
| // - 8 bytes of padding because sigcontext has 16-byte alignment |
| // - struct sigcontext uc_mcontext |
| // [1] |
| // https://github.com/torvalds/linux/blob/master/arch/riscv/kernel/signal.c |
| |
| constexpr size_t siginfo_size = 128; |
| constexpr size_t uc_flags_size = 8; |
| constexpr size_t uc_link_ptr_size = 8; |
| constexpr size_t uc_stack_size = 24; |
| constexpr size_t uc_sigmask_size = 8; |
| constexpr size_t padding_size = 128; |
| |
| constexpr size_t offset = siginfo_size + uc_flags_size + uc_link_ptr_size + |
| uc_stack_size + uc_sigmask_size + padding_size; |
| |
| // In user_regs_struct GPRs are always 64-bit length |
| size_t gpr_size = 8; |
| row.GetCFAValue().SetIsRegisterPlusOffset(gpr_sp_riscv, offset); |
| for (uint32_t reg_num = gpr_first_riscv; reg_num < gpr_first_riscv + 32; |
| ++reg_num) |
| row.SetRegisterLocationToAtCFAPlusOffset(reg_num, reg_num * gpr_size, |
| false); |
| |
| size_t fpr_size = 0; |
| switch (fp_flags) { |
| case ArchSpec::eRISCV_float_abi_soft: |
| fpr_size = 0; |
| break; |
| case ArchSpec::eRISCV_float_abi_single: |
| fpr_size = 4; |
| break; |
| case ArchSpec::eRISCV_float_abi_double: |
| fpr_size = 8; |
| break; |
| case ArchSpec::eRISCV_float_abi_quad: |
| fpr_size = 16; |
| break; |
| } |
| |
| if (fpr_size != 0) { |
| for (uint32_t reg_num = fpr_first_riscv; reg_num < fpr_first_riscv + 32; |
| ++reg_num) { |
| size_t fpr_offset = |
| gpr_size * 32 + (reg_num - fpr_first_riscv) * fpr_size; |
| row.SetRegisterLocationToAtCFAPlusOffset(reg_num, fpr_offset, false); |
| } |
| |
| size_t fpr_fcsr_offset = gpr_size * 32 + fpr_size * 32; |
| row.SetRegisterLocationToAtCFAPlusOffset(fpr_fcsr_riscv, fpr_fcsr_offset, |
| false); |
| } |
| |
| UnwindPlanSP unwind_plan_sp = std::make_shared<UnwindPlan>(eRegisterKindLLDB); |
| unwind_plan_sp->AppendRow(std::move(row)); |
| unwind_plan_sp->SetSourceName("RISC-V Linux sigcontext"); |
| unwind_plan_sp->SetSourcedFromCompiler(eLazyBoolYes); |
| unwind_plan_sp->SetUnwindPlanValidAtAllInstructions(eLazyBoolNo); |
| unwind_plan_sp->SetUnwindPlanForSignalTrap(eLazyBoolYes); |
| |
| return unwind_plan_sp; |
| } |
| |
| lldb::UnwindPlanSP PlatformLinux::GetTrapHandlerUnwindPlan(const ArchSpec &arch, |
| ConstString name) { |
| llvm::Triple triple = arch.GetTriple(); |
| if (triple.isAArch64()) |
| return GetAArch64TrapHandlerUnwindPlan(name); |
| if (triple.isRISCV()) { |
| uint32_t fp_flags = arch.GetFlags() & ArchSpec::eRISCV_float_abi_mask; |
| return GetRISCVTrapHandlerUnwindPlan(name, fp_flags); |
| } |
| return {}; |
| } |
| |
| MmapArgList PlatformLinux::GetMmapArgumentList(const ArchSpec &arch, |
| addr_t addr, addr_t length, |
| unsigned prot, unsigned flags, |
| addr_t fd, addr_t offset) { |
| uint64_t flags_platform = 0; |
| uint64_t map_anon = arch.IsMIPS() ? 0x800 : MAP_ANON; |
| |
| if (flags & eMmapFlagsPrivate) |
| flags_platform |= MAP_PRIVATE; |
| if (flags & eMmapFlagsAnon) |
| flags_platform |= map_anon; |
| |
| MmapArgList args({addr, length, prot, flags_platform, fd, offset}); |
| return args; |
| } |
| |
| CompilerType PlatformLinux::GetSiginfoType(const llvm::Triple &triple) { |
| { |
| std::lock_guard<std::mutex> guard(m_mutex); |
| if (!m_type_system) |
| m_type_system = std::make_shared<TypeSystemClang>("siginfo", triple); |
| } |
| TypeSystemClang *ast = m_type_system.get(); |
| |
| bool si_errno_then_code = true; |
| |
| switch (triple.getArch()) { |
| case llvm::Triple::mips: |
| case llvm::Triple::mipsel: |
| case llvm::Triple::mips64: |
| case llvm::Triple::mips64el: |
| // mips has si_code and si_errno swapped |
| si_errno_then_code = false; |
| break; |
| default: |
| break; |
| } |
| |
| // generic types |
| CompilerType int_type = ast->GetBasicType(eBasicTypeInt); |
| CompilerType uint_type = ast->GetBasicType(eBasicTypeUnsignedInt); |
| CompilerType short_type = ast->GetBasicType(eBasicTypeShort); |
| CompilerType long_type = ast->GetBasicType(eBasicTypeLong); |
| CompilerType voidp_type = ast->GetBasicType(eBasicTypeVoid).GetPointerType(); |
| |
| // platform-specific types |
| CompilerType &pid_type = int_type; |
| CompilerType &uid_type = uint_type; |
| CompilerType &clock_type = long_type; |
| CompilerType &band_type = long_type; |
| |
| CompilerType sigval_type = ast->CreateRecordType( |
| nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "__lldb_sigval_t", |
| llvm::to_underlying(clang::TagTypeKind::Union), lldb::eLanguageTypeC); |
| ast->StartTagDeclarationDefinition(sigval_type); |
| ast->AddFieldToRecordType(sigval_type, "sival_int", int_type, |
| lldb::eAccessPublic, 0); |
| ast->AddFieldToRecordType(sigval_type, "sival_ptr", voidp_type, |
| lldb::eAccessPublic, 0); |
| ast->CompleteTagDeclarationDefinition(sigval_type); |
| |
| CompilerType sigfault_bounds_type = ast->CreateRecordType( |
| nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "", |
| llvm::to_underlying(clang::TagTypeKind::Union), lldb::eLanguageTypeC); |
| ast->StartTagDeclarationDefinition(sigfault_bounds_type); |
| ast->AddFieldToRecordType( |
| sigfault_bounds_type, "_addr_bnd", |
| ast->CreateStructForIdentifier(llvm::StringRef(), |
| { |
| {"_lower", voidp_type}, |
| {"_upper", voidp_type}, |
| }), |
| lldb::eAccessPublic, 0); |
| ast->AddFieldToRecordType(sigfault_bounds_type, "_pkey", uint_type, |
| lldb::eAccessPublic, 0); |
| ast->CompleteTagDeclarationDefinition(sigfault_bounds_type); |
| |
| // siginfo_t |
| CompilerType siginfo_type = ast->CreateRecordType( |
| nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "__lldb_siginfo_t", |
| llvm::to_underlying(clang::TagTypeKind::Struct), lldb::eLanguageTypeC); |
| ast->StartTagDeclarationDefinition(siginfo_type); |
| ast->AddFieldToRecordType(siginfo_type, "si_signo", int_type, |
| lldb::eAccessPublic, 0); |
| |
| if (si_errno_then_code) { |
| ast->AddFieldToRecordType(siginfo_type, "si_errno", int_type, |
| lldb::eAccessPublic, 0); |
| ast->AddFieldToRecordType(siginfo_type, "si_code", int_type, |
| lldb::eAccessPublic, 0); |
| } else { |
| ast->AddFieldToRecordType(siginfo_type, "si_code", int_type, |
| lldb::eAccessPublic, 0); |
| ast->AddFieldToRecordType(siginfo_type, "si_errno", int_type, |
| lldb::eAccessPublic, 0); |
| } |
| |
| // the structure is padded on 64-bit arches to fix alignment |
| if (triple.isArch64Bit()) |
| ast->AddFieldToRecordType(siginfo_type, "__pad0", int_type, |
| lldb::eAccessPublic, 0); |
| |
| // union used to hold the signal data |
| CompilerType union_type = ast->CreateRecordType( |
| nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "", |
| llvm::to_underlying(clang::TagTypeKind::Union), lldb::eLanguageTypeC); |
| ast->StartTagDeclarationDefinition(union_type); |
| |
| ast->AddFieldToRecordType( |
| union_type, "_kill", |
| ast->CreateStructForIdentifier(llvm::StringRef(), |
| { |
| {"si_pid", pid_type}, |
| {"si_uid", uid_type}, |
| }), |
| lldb::eAccessPublic, 0); |
| |
| ast->AddFieldToRecordType( |
| union_type, "_timer", |
| ast->CreateStructForIdentifier(llvm::StringRef(), |
| { |
| {"si_tid", int_type}, |
| {"si_overrun", int_type}, |
| {"si_sigval", sigval_type}, |
| }), |
| lldb::eAccessPublic, 0); |
| |
| ast->AddFieldToRecordType( |
| union_type, "_rt", |
| ast->CreateStructForIdentifier(llvm::StringRef(), |
| { |
| {"si_pid", pid_type}, |
| {"si_uid", uid_type}, |
| {"si_sigval", sigval_type}, |
| }), |
| lldb::eAccessPublic, 0); |
| |
| ast->AddFieldToRecordType( |
| union_type, "_sigchld", |
| ast->CreateStructForIdentifier(llvm::StringRef(), |
| { |
| {"si_pid", pid_type}, |
| {"si_uid", uid_type}, |
| {"si_status", int_type}, |
| {"si_utime", clock_type}, |
| {"si_stime", clock_type}, |
| }), |
| lldb::eAccessPublic, 0); |
| |
| ast->AddFieldToRecordType( |
| union_type, "_sigfault", |
| ast->CreateStructForIdentifier(llvm::StringRef(), |
| { |
| {"si_addr", voidp_type}, |
| {"si_addr_lsb", short_type}, |
| {"_bounds", sigfault_bounds_type}, |
| }), |
| lldb::eAccessPublic, 0); |
| |
| ast->AddFieldToRecordType( |
| union_type, "_sigpoll", |
| ast->CreateStructForIdentifier(llvm::StringRef(), |
| { |
| {"si_band", band_type}, |
| {"si_fd", int_type}, |
| }), |
| lldb::eAccessPublic, 0); |
| |
| // NB: SIGSYS is not present on ia64 but we don't seem to support that |
| ast->AddFieldToRecordType( |
| union_type, "_sigsys", |
| ast->CreateStructForIdentifier(llvm::StringRef(), |
| { |
| {"_call_addr", voidp_type}, |
| {"_syscall", int_type}, |
| {"_arch", uint_type}, |
| }), |
| lldb::eAccessPublic, 0); |
| |
| ast->CompleteTagDeclarationDefinition(union_type); |
| ast->AddFieldToRecordType(siginfo_type, "_sifields", union_type, |
| lldb::eAccessPublic, 0); |
| |
| ast->CompleteTagDeclarationDefinition(siginfo_type); |
| return siginfo_type; |
| } |
| |
| static std::string GetDescriptionFromSiginfo(lldb::ValueObjectSP siginfo_sp) { |
| if (!siginfo_sp) |
| return ""; |
| |
| lldb_private::LinuxSignals linux_signals; |
| int code = siginfo_sp->GetChildMemberWithName("si_code")->GetValueAsSigned(0); |
| int signo = |
| siginfo_sp->GetChildMemberWithName("si_signo")->GetValueAsSigned(-1); |
| |
| auto sifields = siginfo_sp->GetChildMemberWithName("_sifields"); |
| if (!sifields) |
| return linux_signals.GetSignalDescription(signo, code); |
| |
| // declare everything that we can populate later. |
| std::optional<lldb::addr_t> addr; |
| std::optional<lldb::addr_t> upper; |
| std::optional<lldb::addr_t> lower; |
| std::optional<uint32_t> pid; |
| std::optional<uint32_t> uid; |
| |
| // The negative si_codes are special and mean this signal was sent from user |
| // space not the kernel. These take precedence because they break some of the |
| // invariants around kernel sent signals. Such as SIGSEGV won't have an |
| // address. |
| if (code < 0) { |
| auto sikill = sifields->GetChildMemberWithName("_kill"); |
| if (sikill) { |
| auto pid_sp = sikill->GetChildMemberWithName("si_pid"); |
| if (pid_sp) |
| pid = pid_sp->GetValueAsUnsigned(-1); |
| auto uid_sp = sikill->GetChildMemberWithName("si_uid"); |
| if (uid_sp) |
| uid = uid_sp->GetValueAsUnsigned(-1); |
| } |
| } else { |
| |
| switch (signo) { |
| case SIGILL: |
| case SIGFPE: |
| case SIGBUS: { |
| auto sigfault = sifields->GetChildMemberWithName("_sigfault"); |
| if (!sigfault) |
| break; |
| |
| auto addr_sp = sigfault->GetChildMemberWithName("si_addr"); |
| if (addr_sp) |
| addr = addr_sp->GetValueAsUnsigned(-1); |
| break; |
| } |
| case SIGSEGV: { |
| auto sigfault = sifields->GetChildMemberWithName("_sigfault"); |
| if (!sigfault) |
| break; |
| |
| auto addr_sp = sigfault->GetChildMemberWithName("si_addr"); |
| if (addr_sp) |
| addr = addr_sp->GetValueAsUnsigned(-1); |
| |
| auto bounds_sp = sigfault->GetChildMemberWithName("_bounds"); |
| if (!bounds_sp) |
| break; |
| |
| auto addr_bnds_sp = bounds_sp->GetChildMemberWithName("_addr_bnd"); |
| if (!addr_bnds_sp) |
| break; |
| |
| auto lower_sp = addr_bnds_sp->GetChildMemberWithName("_lower"); |
| if (lower_sp) |
| lower = lower_sp->GetValueAsUnsigned(-1); |
| |
| auto upper_sp = addr_bnds_sp->GetChildMemberWithName("_upper"); |
| if (upper_sp) |
| upper = upper_sp->GetValueAsUnsigned(-1); |
| |
| break; |
| } |
| default: |
| break; |
| } |
| } |
| |
| return linux_signals.GetSignalDescription(signo, code, addr, lower, upper, |
| pid, uid); |
| } |
| |
| lldb::StopInfoSP PlatformLinux::GetStopInfoFromSiginfo(Thread &thread) { |
| ValueObjectSP siginfo_sp = thread.GetSiginfoValue(); |
| if (!siginfo_sp) |
| return {}; |
| auto signo_sp = siginfo_sp->GetChildMemberWithName("si_signo"); |
| auto sicode_sp = siginfo_sp->GetChildMemberWithName("si_code"); |
| if (!signo_sp || !sicode_sp) |
| return {}; |
| |
| std::string siginfo_description = GetDescriptionFromSiginfo(siginfo_sp); |
| if (siginfo_description.empty()) |
| return StopInfo::CreateStopReasonWithSignal( |
| thread, signo_sp->GetValueAsUnsigned(-1)); |
| |
| return StopInfo::CreateStopReasonWithSignal( |
| thread, signo_sp->GetValueAsUnsigned(-1), siginfo_description.c_str(), |
| sicode_sp->GetValueAsUnsigned(0)); |
| } |
