| //===-- ObjectFileMachO.cpp -------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // C Includes |
| // C++ Includes |
| // Other libraries and framework includes |
| #include "llvm/ADT/StringRef.h" |
| |
| // Project includes |
| #include "Plugins/Process/Utility/RegisterContextDarwin_arm.h" |
| #include "Plugins/Process/Utility/RegisterContextDarwin_arm64.h" |
| #include "Plugins/Process/Utility/RegisterContextDarwin_i386.h" |
| #include "Plugins/Process/Utility/RegisterContextDarwin_x86_64.h" |
| #include "lldb/Core/Debugger.h" |
| #include "lldb/Core/FileSpecList.h" |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/ModuleSpec.h" |
| #include "lldb/Core/PluginManager.h" |
| #include "lldb/Core/RangeMap.h" |
| #include "lldb/Core/RegisterValue.h" |
| #include "lldb/Core/Section.h" |
| #include "lldb/Core/StreamFile.h" |
| #include "lldb/Host/Host.h" |
| #include "lldb/Symbol/DWARFCallFrameInfo.h" |
| #include "lldb/Symbol/ObjectFile.h" |
| #include "lldb/Target/DynamicLoader.h" |
| #include "lldb/Target/MemoryRegionInfo.h" |
| #include "lldb/Target/Platform.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/SectionLoadList.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Target/Thread.h" |
| #include "lldb/Target/ThreadList.h" |
| #include "lldb/Utility/ArchSpec.h" |
| #include "lldb/Utility/DataBuffer.h" |
| #include "lldb/Utility/FileSpec.h" |
| #include "lldb/Utility/Log.h" |
| #include "lldb/Utility/Status.h" |
| #include "lldb/Utility/StreamString.h" |
| #include "lldb/Utility/Timer.h" |
| #include "lldb/Utility/UUID.h" |
| |
| #include "lldb/Utility/SafeMachO.h" |
| |
| #include "llvm/Support/MemoryBuffer.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" |
| #else |
| #include <uuid/uuid.h> |
| #endif |
| |
| #define THUMB_ADDRESS_BIT_MASK 0xfffffffffffffffeull |
| using namespace lldb; |
| using namespace lldb_private; |
| using namespace llvm::MachO; |
| |
| // Some structure definitions needed for parsing the dyld shared cache files |
| // found on iOS devices. |
| |
| struct lldb_copy_dyld_cache_header_v1 { |
| char magic[16]; // e.g. "dyld_v0 i386", "dyld_v1 armv7", etc. |
| uint32_t mappingOffset; // file offset to first dyld_cache_mapping_info |
| uint32_t mappingCount; // number of dyld_cache_mapping_info entries |
| uint32_t imagesOffset; |
| uint32_t imagesCount; |
| uint64_t dyldBaseAddress; |
| uint64_t codeSignatureOffset; |
| uint64_t codeSignatureSize; |
| uint64_t slideInfoOffset; |
| uint64_t slideInfoSize; |
| uint64_t localSymbolsOffset; |
| uint64_t localSymbolsSize; |
| uint8_t uuid[16]; // v1 and above, also recorded in dyld_all_image_infos v13 |
| // and later |
| }; |
| |
| 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; |
| }; |
| |
| class RegisterContextDarwin_x86_64_Mach : public RegisterContextDarwin_x86_64 { |
| public: |
| RegisterContextDarwin_x86_64_Mach(lldb_private::Thread &thread, |
| const DataExtractor &data) |
| : RegisterContextDarwin_x86_64(thread, 0) { |
| SetRegisterDataFrom_LC_THREAD(data); |
| } |
| |
| void InvalidateAllRegisters() override { |
| // Do nothing... registers are always valid... |
| } |
| |
| void SetRegisterDataFrom_LC_THREAD(const DataExtractor &data) { |
| lldb::offset_t offset = 0; |
| SetError(GPRRegSet, Read, -1); |
| SetError(FPURegSet, Read, -1); |
| SetError(EXCRegSet, Read, -1); |
| bool done = false; |
| |
| while (!done) { |
| int flavor = data.GetU32(&offset); |
| if (flavor == 0) |
| done = true; |
| else { |
| uint32_t i; |
| uint32_t count = data.GetU32(&offset); |
| switch (flavor) { |
| case GPRRegSet: |
| for (i = 0; i < count; ++i) |
| (&gpr.rax)[i] = data.GetU64(&offset); |
| SetError(GPRRegSet, Read, 0); |
| done = true; |
| |
| break; |
| case FPURegSet: |
| // TODO: fill in FPU regs.... |
| // SetError (FPURegSet, Read, -1); |
| done = true; |
| |
| break; |
| case EXCRegSet: |
| exc.trapno = data.GetU32(&offset); |
| exc.err = data.GetU32(&offset); |
| exc.faultvaddr = data.GetU64(&offset); |
| SetError(EXCRegSet, Read, 0); |
| done = true; |
| break; |
| case 7: |
| case 8: |
| case 9: |
| // fancy flavors that encapsulate of the above flavors... |
| break; |
| |
| default: |
| done = true; |
| break; |
| } |
| } |
| } |
| } |
| |
| static 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(GPRWordCount); |
| 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(EXCWordCount); |
| 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: |
| int DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) override { return 0; } |
| |
| int DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) override { return 0; } |
| |
| int DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) override { return 0; } |
| |
| int DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) override { |
| return 0; |
| } |
| |
| int DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) override { |
| return 0; |
| } |
| |
| int DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) override { |
| return 0; |
| } |
| }; |
| |
| class RegisterContextDarwin_i386_Mach : public RegisterContextDarwin_i386 { |
| public: |
| RegisterContextDarwin_i386_Mach(lldb_private::Thread &thread, |
| const DataExtractor &data) |
| : RegisterContextDarwin_i386(thread, 0) { |
| SetRegisterDataFrom_LC_THREAD(data); |
| } |
| |
| void InvalidateAllRegisters() override { |
| // Do nothing... registers are always valid... |
| } |
| |
| void SetRegisterDataFrom_LC_THREAD(const DataExtractor &data) { |
| lldb::offset_t offset = 0; |
| SetError(GPRRegSet, Read, -1); |
| SetError(FPURegSet, Read, -1); |
| SetError(EXCRegSet, Read, -1); |
| bool done = false; |
| |
| while (!done) { |
| int flavor = data.GetU32(&offset); |
| if (flavor == 0) |
| done = true; |
| else { |
| uint32_t i; |
| uint32_t count = data.GetU32(&offset); |
| switch (flavor) { |
| case GPRRegSet: |
| for (i = 0; i < count; ++i) |
| (&gpr.eax)[i] = data.GetU32(&offset); |
| SetError(GPRRegSet, Read, 0); |
| done = true; |
| |
| break; |
| case FPURegSet: |
| // TODO: fill in FPU regs.... |
| // SetError (FPURegSet, Read, -1); |
| done = true; |
| |
| break; |
| case EXCRegSet: |
| exc.trapno = data.GetU32(&offset); |
| exc.err = data.GetU32(&offset); |
| exc.faultvaddr = data.GetU32(&offset); |
| SetError(EXCRegSet, Read, 0); |
| done = true; |
| break; |
| case 7: |
| case 8: |
| case 9: |
| // fancy flavors that encapsulate of the above flavors... |
| break; |
| |
| default: |
| done = true; |
| break; |
| } |
| } |
| } |
| } |
| |
| static 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(GPRWordCount); |
| WriteRegister(reg_ctx, "eax", NULL, 4, data); |
| WriteRegister(reg_ctx, "ebx", NULL, 4, data); |
| WriteRegister(reg_ctx, "ecx", NULL, 4, data); |
| WriteRegister(reg_ctx, "edx", NULL, 4, data); |
| WriteRegister(reg_ctx, "edi", NULL, 4, data); |
| WriteRegister(reg_ctx, "esi", NULL, 4, data); |
| WriteRegister(reg_ctx, "ebp", NULL, 4, data); |
| WriteRegister(reg_ctx, "esp", NULL, 4, data); |
| WriteRegister(reg_ctx, "ss", NULL, 4, data); |
| WriteRegister(reg_ctx, "eflags", NULL, 4, data); |
| WriteRegister(reg_ctx, "eip", NULL, 4, data); |
| WriteRegister(reg_ctx, "cs", NULL, 4, data); |
| WriteRegister(reg_ctx, "ds", NULL, 4, data); |
| WriteRegister(reg_ctx, "es", NULL, 4, data); |
| WriteRegister(reg_ctx, "fs", NULL, 4, data); |
| WriteRegister(reg_ctx, "gs", NULL, 4, data); |
| |
| // Write out the EXC registers |
| data.PutHex32(EXCRegSet); |
| data.PutHex32(EXCWordCount); |
| WriteRegister(reg_ctx, "trapno", NULL, 4, data); |
| WriteRegister(reg_ctx, "err", NULL, 4, data); |
| WriteRegister(reg_ctx, "faultvaddr", NULL, 4, data); |
| return true; |
| } |
| return false; |
| } |
| |
| protected: |
| int DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) override { return 0; } |
| |
| int DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) override { return 0; } |
| |
| int DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) override { return 0; } |
| |
| int DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) override { |
| return 0; |
| } |
| |
| int DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) override { |
| return 0; |
| } |
| |
| int DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) override { |
| return 0; |
| } |
| }; |
| |
| class RegisterContextDarwin_arm_Mach : public RegisterContextDarwin_arm { |
| public: |
| RegisterContextDarwin_arm_Mach(lldb_private::Thread &thread, |
| const DataExtractor &data) |
| : RegisterContextDarwin_arm(thread, 0) { |
| SetRegisterDataFrom_LC_THREAD(data); |
| } |
| |
| void InvalidateAllRegisters() override { |
| // Do nothing... registers are always valid... |
| } |
| |
| void SetRegisterDataFrom_LC_THREAD(const DataExtractor &data) { |
| lldb::offset_t offset = 0; |
| SetError(GPRRegSet, Read, -1); |
| SetError(FPURegSet, Read, -1); |
| SetError(EXCRegSet, Read, -1); |
| bool done = false; |
| |
| while (!done) { |
| int flavor = data.GetU32(&offset); |
| uint32_t count = data.GetU32(&offset); |
| lldb::offset_t next_thread_state = offset + (count * 4); |
| switch (flavor) { |
| case GPRAltRegSet: |
| case GPRRegSet: |
| 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; |
| } |
| } |
| } |
| |
| 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(GPRWordCount); |
| WriteRegister(reg_ctx, "r0", NULL, 4, data); |
| WriteRegister(reg_ctx, "r1", NULL, 4, data); |
| WriteRegister(reg_ctx, "r2", NULL, 4, data); |
| WriteRegister(reg_ctx, "r3", NULL, 4, data); |
| WriteRegister(reg_ctx, "r4", NULL, 4, data); |
| WriteRegister(reg_ctx, "r5", NULL, 4, data); |
| WriteRegister(reg_ctx, "r6", NULL, 4, data); |
| WriteRegister(reg_ctx, "r7", NULL, 4, data); |
| WriteRegister(reg_ctx, "r8", NULL, 4, data); |
| WriteRegister(reg_ctx, "r9", NULL, 4, data); |
| WriteRegister(reg_ctx, "r10", NULL, 4, data); |
| WriteRegister(reg_ctx, "r11", NULL, 4, data); |
| WriteRegister(reg_ctx, "r12", NULL, 4, data); |
| WriteRegister(reg_ctx, "sp", NULL, 4, data); |
| WriteRegister(reg_ctx, "lr", NULL, 4, data); |
| WriteRegister(reg_ctx, "pc", NULL, 4, data); |
| WriteRegister(reg_ctx, "cpsr", NULL, 4, data); |
| |
| // Write out the EXC registers |
| // data.PutHex32 (EXCRegSet); |
| // data.PutHex32 (EXCWordCount); |
| // WriteRegister (reg_ctx, "exception", NULL, 4, data); |
| // WriteRegister (reg_ctx, "fsr", NULL, 4, data); |
| // WriteRegister (reg_ctx, "far", NULL, 4, data); |
| return true; |
| } |
| return false; |
| } |
| |
| protected: |
| int DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) override { return -1; } |
| |
| int DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) override { return -1; } |
| |
| int DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) override { return -1; } |
| |
| int DoReadDBG(lldb::tid_t tid, int flavor, DBG &dbg) override { return -1; } |
| |
| int DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) override { |
| return 0; |
| } |
| |
| int DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) override { |
| return 0; |
| } |
| |
| int DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) override { |
| return 0; |
| } |
| |
| int DoWriteDBG(lldb::tid_t tid, int flavor, const DBG &dbg) override { |
| return -1; |
| } |
| }; |
| |
| class RegisterContextDarwin_arm64_Mach : public RegisterContextDarwin_arm64 { |
| public: |
| RegisterContextDarwin_arm64_Mach(lldb_private::Thread &thread, |
| const DataExtractor &data) |
| : RegisterContextDarwin_arm64(thread, 0) { |
| SetRegisterDataFrom_LC_THREAD(data); |
| } |
| |
| void InvalidateAllRegisters() override { |
| // Do nothing... registers are always valid... |
| } |
| |
| void SetRegisterDataFrom_LC_THREAD(const DataExtractor &data) { |
| lldb::offset_t offset = 0; |
| SetError(GPRRegSet, Read, -1); |
| SetError(FPURegSet, Read, -1); |
| SetError(EXCRegSet, Read, -1); |
| bool done = false; |
| while (!done) { |
| int flavor = data.GetU32(&offset); |
| uint32_t count = data.GetU32(&offset); |
| lldb::offset_t next_thread_state = offset + (count * 4); |
| switch (flavor) { |
| case GPRRegSet: |
| // x0-x29 + fp + lr + sp + pc (== 33 64-bit registers) plus cpsr (1 |
| // 32-bit register) |
| if (count >= (33 * 2) + 1) { |
| for (uint32_t i = 0; i < 29; ++i) |
| gpr.x[i] = data.GetU64(&offset); |
| gpr.fp = data.GetU64(&offset); |
| gpr.lr = data.GetU64(&offset); |
| gpr.sp = data.GetU64(&offset); |
| gpr.pc = data.GetU64(&offset); |
| gpr.cpsr = data.GetU32(&offset); |
| SetError(GPRRegSet, Read, 0); |
| } |
| offset = next_thread_state; |
| break; |
| case FPURegSet: { |
| uint8_t *fpu_reg_buf = (uint8_t *)&fpu.v[0]; |
| const int fpu_reg_buf_size = sizeof(fpu); |
| if (fpu_reg_buf_size == count * sizeof(uint32_t) && |
| data.ExtractBytes(offset, fpu_reg_buf_size, eByteOrderLittle, |
| fpu_reg_buf) == fpu_reg_buf_size) { |
| SetError(FPURegSet, Read, 0); |
| } else { |
| done = true; |
| } |
| } |
| offset = next_thread_state; |
| break; |
| case EXCRegSet: |
| if (count == 4) { |
| exc.far = data.GetU64(&offset); |
| exc.esr = data.GetU32(&offset); |
| exc.exception = data.GetU32(&offset); |
| SetError(EXCRegSet, Read, 0); |
| } |
| offset = next_thread_state; |
| break; |
| default: |
| done = true; |
| break; |
| } |
| } |
| } |
| |
| static 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(GPRWordCount); |
| WriteRegister(reg_ctx, "x0", NULL, 8, data); |
| WriteRegister(reg_ctx, "x1", NULL, 8, data); |
| WriteRegister(reg_ctx, "x2", NULL, 8, data); |
| WriteRegister(reg_ctx, "x3", NULL, 8, data); |
| WriteRegister(reg_ctx, "x4", NULL, 8, data); |
| WriteRegister(reg_ctx, "x5", NULL, 8, data); |
| WriteRegister(reg_ctx, "x6", NULL, 8, data); |
| WriteRegister(reg_ctx, "x7", NULL, 8, data); |
| WriteRegister(reg_ctx, "x8", NULL, 8, data); |
| WriteRegister(reg_ctx, "x9", NULL, 8, data); |
| WriteRegister(reg_ctx, "x10", NULL, 8, data); |
| WriteRegister(reg_ctx, "x11", NULL, 8, data); |
| WriteRegister(reg_ctx, "x12", NULL, 8, data); |
| WriteRegister(reg_ctx, "x13", NULL, 8, data); |
| WriteRegister(reg_ctx, "x14", NULL, 8, data); |
| WriteRegister(reg_ctx, "x15", NULL, 8, data); |
| WriteRegister(reg_ctx, "x16", NULL, 8, data); |
| WriteRegister(reg_ctx, "x17", NULL, 8, data); |
| WriteRegister(reg_ctx, "x18", NULL, 8, data); |
| WriteRegister(reg_ctx, "x19", NULL, 8, data); |
| WriteRegister(reg_ctx, "x20", NULL, 8, data); |
| WriteRegister(reg_ctx, "x21", NULL, 8, data); |
| WriteRegister(reg_ctx, "x22", NULL, 8, data); |
| WriteRegister(reg_ctx, "x23", NULL, 8, data); |
| WriteRegister(reg_ctx, "x24", NULL, 8, data); |
| WriteRegister(reg_ctx, "x25", NULL, 8, data); |
| WriteRegister(reg_ctx, "x26", NULL, 8, data); |
| WriteRegister(reg_ctx, "x27", NULL, 8, data); |
| WriteRegister(reg_ctx, "x28", NULL, 8, data); |
| WriteRegister(reg_ctx, "fp", NULL, 8, data); |
| WriteRegister(reg_ctx, "lr", NULL, 8, data); |
| WriteRegister(reg_ctx, "sp", NULL, 8, data); |
| WriteRegister(reg_ctx, "pc", NULL, 8, data); |
| WriteRegister(reg_ctx, "cpsr", NULL, 4, data); |
| |
| // Write out the EXC registers |
| // data.PutHex32 (EXCRegSet); |
| // data.PutHex32 (EXCWordCount); |
| // WriteRegister (reg_ctx, "far", NULL, 8, data); |
| // WriteRegister (reg_ctx, "esr", NULL, 4, data); |
| // WriteRegister (reg_ctx, "exception", NULL, 4, data); |
| return true; |
| } |
| return false; |
| } |
| |
| protected: |
| int DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) override { return -1; } |
| |
| int DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) override { return -1; } |
| |
| int DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) override { return -1; } |
| |
| int DoReadDBG(lldb::tid_t tid, int flavor, DBG &dbg) override { return -1; } |
| |
| int DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) override { |
| return 0; |
| } |
| |
| int DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) override { |
| return 0; |
| } |
| |
| int DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) override { |
| return 0; |
| } |
| |
| int DoWriteDBG(lldb::tid_t tid, int flavor, const DBG &dbg) override { |
| return -1; |
| } |
| }; |
| |
| 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 = MapFileData(*file, length, file_offset); |
| if (!data_sp) |
| return nullptr; |
| data_offset = 0; |
| } |
| |
| if (!ObjectFileMachO::MagicBytesMatch(data_sp, data_offset, length)) |
| return nullptr; |
| |
| // Update the data to contain the entire file if it doesn't already |
| if (data_sp->GetByteSize() < length) { |
| data_sp = MapFileData(*file, length, file_offset); |
| if (!data_sp) |
| return nullptr; |
| data_offset = 0; |
| } |
| auto objfile_ap = llvm::make_unique<ObjectFileMachO>( |
| module_sp, data_sp, data_offset, file, file_offset, length); |
| if (!objfile_ap || !objfile_ap->ParseHeader()) |
| return nullptr; |
| |
| return objfile_ap.release(); |
| } |
| |
| 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 = MapFileData(file, header_and_load_cmds, file_offset); |
| data.SetData(data_sp); |
| data_offset = MachHeaderSizeFromMagic(header.magic); |
| } |
| if (data_sp) { |
| ModuleSpec spec; |
| spec.GetFileSpec() = file; |
| spec.SetObjectOffset(file_offset); |
| spec.SetObjectSize(length); |
| |
| 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::GetSegmentNameDATA_DIRTY() { |
| static ConstString g_segment_name("__DATA_DIRTY"); |
| return g_segment_name; |
| } |
| |
| const ConstString &ObjectFileMachO::GetSegmentNameDATA_CONST() { |
| static ConstString g_segment_name("__DATA_CONST"); |
| return g_segment_name; |
| } |
| |
| 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), |
| m_reexported_dylibs(), m_allow_assembly_emulation_unwind_plans(true) { |
| ::memset(&m_header, 0, sizeof(m_header)); |
| ::memset(&m_dysymtab, 0, sizeof(m_dysymtab)); |
| } |
| |
| ObjectFileMachO::ObjectFileMachO(const lldb::ModuleSP &module_sp, |
| lldb::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), |
| m_reexported_dylibs(), m_allow_assembly_emulation_unwind_plans(true) { |
| ::memset(&m_header, 0, sizeof(m_header)); |
| ::memset(&m_dysymtab, 0, sizeof(m_dysymtab)); |
| } |
| |
| bool ObjectFileMachO::ParseHeader(DataExtractor &data, |
| lldb::offset_t *data_offset_ptr, |
| llvm::MachO::mach_header &header) { |
| data.SetByteOrder(endian::InlHostByteOrder()); |
| // Leave magic in the original byte order |
| header.magic = data.GetU32(data_offset_ptr); |
| bool can_parse = false; |
| bool is_64_bit = false; |
| switch (header.magic) { |
| case MH_MAGIC: |
| data.SetByteOrder(endian::InlHostByteOrder()); |
| data.SetAddressByteSize(4); |
| can_parse = true; |
| break; |
| |
| case MH_MAGIC_64: |
| data.SetByteOrder(endian::InlHostByteOrder()); |
| data.SetAddressByteSize(8); |
| can_parse = true; |
| is_64_bit = true; |
| break; |
| |
| case MH_CIGAM: |
| data.SetByteOrder(endian::InlHostByteOrder() == eByteOrderBig |
| ? eByteOrderLittle |
| : eByteOrderBig); |
| data.SetAddressByteSize(4); |
| can_parse = true; |
| break; |
| |
| case MH_CIGAM_64: |
| data.SetByteOrder(endian::InlHostByteOrder() == eByteOrderBig |
| ? eByteOrderLittle |
| : eByteOrderBig); |
| data.SetAddressByteSize(8); |
| is_64_bit = true; |
| can_parse = true; |
| break; |
| |
| default: |
| break; |
| } |
| |
| if (can_parse) { |
| data.GetU32(data_offset_ptr, &header.cputype, 6); |
| if (is_64_bit) |
| *data_offset_ptr += 4; |
| return true; |
| } else { |
| memset(&header, 0, sizeof(header)); |
| } |
| return false; |
| } |
| |
| bool ObjectFileMachO::ParseHeader() { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| bool can_parse = false; |
| lldb::offset_t offset = 0; |
| m_data.SetByteOrder(endian::InlHostByteOrder()); |
| // Leave magic in the original byte order |
| m_header.magic = m_data.GetU32(&offset); |
| switch (m_header.magic) { |
| case MH_MAGIC: |
| m_data.SetByteOrder(endian::InlHostByteOrder()); |
| m_data.SetAddressByteSize(4); |
| can_parse = true; |
| break; |
| |
| case MH_MAGIC_64: |
| m_data.SetByteOrder(endian::InlHostByteOrder()); |
| m_data.SetAddressByteSize(8); |
| can_parse = true; |
| break; |
| |
| case MH_CIGAM: |
| m_data.SetByteOrder(endian::InlHostByteOrder() == eByteOrderBig |
| ? eByteOrderLittle |
| : eByteOrderBig); |
| m_data.SetAddressByteSize(4); |
| can_parse = true; |
| break; |
| |
| case MH_CIGAM_64: |
| m_data.SetByteOrder(endian::InlHostByteOrder() == eByteOrderBig |
| ? eByteOrderLittle |
| : eByteOrderBig); |
| m_data.SetAddressByteSize(8); |
| can_parse = true; |
| break; |
| |
| default: |
| break; |
| } |
| |
| if (can_parse) { |
| m_data.GetU32(&offset, &m_header.cputype, 6); |
| |
| 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 = MapFileData(m_file, header_and_lc_size, m_file_offset); |
| 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->GetAddressRef().GetSection()); |
| if (section_sp) { |
| const lldb::SectionType section_type = section_sp->GetType(); |
| switch (section_type) { |
| case eSectionTypeInvalid: |
| return AddressClass::eUnknown; |
| |
| case eSectionTypeCode: |
| if (m_header.cputype == llvm::MachO::CPU_TYPE_ARM) { |
| // For ARM we have a bit in the n_desc field of the symbol that |
| // tells us ARM/Thumb which is bit 0x0008. |
| if (symbol->GetFlags() & MACHO_NLIST_ARM_SYMBOL_IS_THUMB) |
| return AddressClass::eCodeAlternateISA; |
| } |
| return AddressClass::eCode; |
| |
| case eSectionTypeContainer: |
| return AddressClass::eUnknown; |
| |
| case eSectionTypeData: |
| case eSectionTypeDataCString: |
| case eSectionTypeDataCStringPointers: |
| case eSectionTypeDataSymbolAddress: |
| case eSectionTypeData4: |
| case eSectionTypeData8: |
| case eSectionTypeData16: |
| case eSectionTypeDataPointers: |
| case eSectionTypeZeroFill: |
| case eSectionTypeDataObjCMessageRefs: |
| case eSectionTypeDataObjCCFStrings: |
| case eSectionTypeGoSymtab: |
| return AddressClass::eData; |
| |
| case eSectionTypeDebug: |
| case eSectionTypeDWARFDebugAbbrev: |
| case eSectionTypeDWARFDebugAddr: |
| case eSectionTypeDWARFDebugAranges: |
| case eSectionTypeDWARFDebugCuIndex: |
| case eSectionTypeDWARFDebugFrame: |
| case eSectionTypeDWARFDebugInfo: |
| case eSectionTypeDWARFDebugLine: |
| case eSectionTypeDWARFDebugLoc: |
| case eSectionTypeDWARFDebugMacInfo: |
| case eSectionTypeDWARFDebugMacro: |
| case eSectionTypeDWARFDebugNames: |
| case eSectionTypeDWARFDebugPubNames: |
| case eSectionTypeDWARFDebugPubTypes: |
| case eSectionTypeDWARFDebugRanges: |
| case eSectionTypeDWARFDebugStr: |
| case eSectionTypeDWARFDebugStrOffsets: |
| case eSectionTypeDWARFDebugTypes: |
| case eSectionTypeDWARFAppleNames: |
| case eSectionTypeDWARFAppleTypes: |
| case eSectionTypeDWARFAppleNamespaces: |
| case eSectionTypeDWARFAppleObjC: |
| case eSectionTypeDWARFGNUDebugAltLink: |
| return AddressClass::eDebug; |
| |
| case eSectionTypeEHFrame: |
| case eSectionTypeARMexidx: |
| case eSectionTypeARMextab: |
| case eSectionTypeCompactUnwind: |
| return AddressClass::eRuntime; |
| |
| case eSectionTypeAbsoluteAddress: |
| case eSectionTypeELFSymbolTable: |
| case eSectionTypeELFDynamicSymbols: |
| case eSectionTypeELFRelocationEntries: |
| case eSectionTypeELFDynamicLinkInfo: |
| case eSectionTypeOther: |
| return AddressClass::eUnknown; |
| } |
| } |
| } |
| |
| const SymbolType symbol_type = symbol->GetType(); |
| switch (symbol_type) { |
| case eSymbolTypeAny: |
| return AddressClass::eUnknown; |
| case eSymbolTypeAbsolute: |
| return AddressClass::eUnknown; |
| |
| case eSymbolTypeCode: |
| case eSymbolTypeTrampoline: |
| case eSymbolTypeResolver: |
| if (m_header.cputype == llvm::MachO::CPU_TYPE_ARM) { |
| // For ARM we have a bit in the n_desc field of the symbol that tells |
| // us ARM/Thumb which is bit 0x0008. |
| if (symbol->GetFlags() & MACHO_NLIST_ARM_SYMBOL_IS_THUMB) |
| return AddressClass::eCodeAlternateISA; |
| } |
| return AddressClass::eCode; |
| |
| case eSymbolTypeData: |
| return AddressClass::eData; |
| case eSymbolTypeRuntime: |
| return AddressClass::eRuntime; |
| case eSymbolTypeException: |
| return AddressClass::eRuntime; |
| case eSymbolTypeSourceFile: |
| return AddressClass::eDebug; |
| case eSymbolTypeHeaderFile: |
| return AddressClass::eDebug; |
| case eSymbolTypeObjectFile: |
| return AddressClass::eDebug; |
| case eSymbolTypeCommonBlock: |
| return AddressClass::eDebug; |
| case eSymbolTypeBlock: |
| return AddressClass::eDebug; |
| case eSymbolTypeLocal: |
| return AddressClass::eData; |
| case eSymbolTypeParam: |
| return AddressClass::eData; |
| case eSymbolTypeVariable: |
| return AddressClass::eData; |
| case eSymbolTypeVariableType: |
| return AddressClass::eDebug; |
| case eSymbolTypeLineEntry: |
| return AddressClass::eDebug; |
| case eSymbolTypeLineHeader: |
| return AddressClass::eDebug; |
| case eSymbolTypeScopeBegin: |
| return AddressClass::eDebug; |
| case eSymbolTypeScopeEnd: |
| return AddressClass::eDebug; |
| case eSymbolTypeAdditional: |
| return AddressClass::eUnknown; |
| case eSymbolTypeCompiler: |
| return AddressClass::eDebug; |
| case eSymbolTypeInstrumentation: |
| return AddressClass::eDebug; |
| case eSymbolTypeUndefined: |
| return AddressClass::eUnknown; |
| case eSymbolTypeObjCClass: |
| return AddressClass::eRuntime; |
| case eSymbolTypeObjCMetaClass: |
| return AddressClass::eRuntime; |
| case eSymbolTypeObjCIVar: |
| return AddressClass::eRuntime; |
| case eSymbolTypeReExported: |
| return AddressClass::eRuntime; |
| } |
| } |
| } |
| return AddressClass::eUnknown; |
| } |
| |
| Symtab *ObjectFileMachO::GetSymtab() { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| if (m_symtab_ap.get() == NULL) { |
| m_symtab_ap.reset(new Symtab(this)); |
| std::lock_guard<std::recursive_mutex> symtab_guard( |
| 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; |
| } |
| |
| ObjectFileMachO::EncryptedFileRanges ObjectFileMachO::GetEncryptedFileRanges() { |
| EncryptedFileRanges result; |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| |
| encryption_info_command encryption_cmd; |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const lldb::offset_t load_cmd_offset = offset; |
| if (m_data.GetU32(&offset, &encryption_cmd, 2) == NULL) |
| break; |
| |
| // LC_ENCRYPTION_INFO and LC_ENCRYPTION_INFO_64 have the same sizes for the |
| // 3 fields we care about, so treat them the same. |
| if (encryption_cmd.cmd == LC_ENCRYPTION_INFO || |
| encryption_cmd.cmd == LC_ENCRYPTION_INFO_64) { |
| if (m_data.GetU32(&offset, &encryption_cmd.cryptoff, 3)) { |
| if (encryption_cmd.cryptid != 0) { |
| EncryptedFileRanges::Entry entry; |
| entry.SetRangeBase(encryption_cmd.cryptoff); |
| entry.SetByteSize(encryption_cmd.cryptsize); |
| result.Append(entry); |
| } |
| } |
| } |
| offset = load_cmd_offset + encryption_cmd.cmdsize; |
| } |
| |
| return result; |
| } |
| |
| void ObjectFileMachO::SanitizeSegmentCommand(segment_command_64 &seg_cmd, |
| uint32_t cmd_idx) { |
| if (m_length == 0 || seg_cmd.filesize == 0) |
| return; |
| |
| if (seg_cmd.fileoff > m_length) { |
| // We have a load command that says it extends past the end of the file. |
| // This is likely a corrupt file. We don't have any way to return an error |
| // condition here (this method was likely invoked from something like |
| // ObjectFile::GetSectionList()), so we just null out the section contents, |
| // and dump a message to stdout. The most common case here is core file |
| // debugging with a truncated file. |
| const char *lc_segment_name = |
| seg_cmd.cmd == LC_SEGMENT_64 ? "LC_SEGMENT_64" : "LC_SEGMENT"; |
| GetModule()->ReportWarning( |
| "load command %u %s has a fileoff (0x%" PRIx64 |
| ") that extends beyond the end of the file (0x%" PRIx64 |
| "), ignoring this section", |
| cmd_idx, lc_segment_name, seg_cmd.fileoff, m_length); |
| |
| seg_cmd.fileoff = 0; |
| seg_cmd.filesize = 0; |
| } |
| |
| if (seg_cmd.fileoff + seg_cmd.filesize > m_length) { |
| // We have a load command that says it extends past the end of the file. |
| // This is likely a corrupt file. We don't have any way to return an error |
| // condition here (this method was likely invoked from something like |
| // ObjectFile::GetSectionList()), so we just null out the section contents, |
| // and dump a message to stdout. The most common case here is core file |
| // debugging with a truncated file. |
| const char *lc_segment_name = |
| seg_cmd.cmd == LC_SEGMENT_64 ? "LC_SEGMENT_64" : "LC_SEGMENT"; |
| GetModule()->ReportWarning( |
| "load command %u %s has a fileoff + filesize (0x%" PRIx64 |
| ") that extends beyond the end of the file (0x%" PRIx64 |
| "), the segment will be truncated to match", |
| cmd_idx, lc_segment_name, seg_cmd.fileoff + seg_cmd.filesize, m_length); |
| |
| // Truncate the length |
| seg_cmd.filesize = m_length - seg_cmd.fileoff; |
| } |
| } |
| |
| static uint32_t GetSegmentPermissions(const segment_command_64 &seg_cmd) { |
| uint32_t result = 0; |
| if (seg_cmd.initprot & VM_PROT_READ) |
| result |= ePermissionsReadable; |
| if (seg_cmd.initprot & VM_PROT_WRITE) |
| result |= ePermissionsWritable; |
| if (seg_cmd.initprot & VM_PROT_EXECUTE) |
| result |= ePermissionsExecutable; |
| return result; |
| } |
| |
| static lldb::SectionType GetSectionType(uint32_t flags, |
| ConstString section_name) { |
| |
| if (flags & (S_ATTR_PURE_INSTRUCTIONS | S_ATTR_SOME_INSTRUCTIONS)) |
| return eSectionTypeCode; |
| |
| uint32_t mach_sect_type = flags & SECTION_TYPE; |
| static ConstString g_sect_name_objc_data("__objc_data"); |
| static ConstString g_sect_name_objc_msgrefs("__objc_msgrefs"); |
| static ConstString g_sect_name_objc_selrefs("__objc_selrefs"); |
| static ConstString g_sect_name_objc_classrefs("__objc_classrefs"); |
| static ConstString g_sect_name_objc_superrefs("__objc_superrefs"); |
| static ConstString g_sect_name_objc_const("__objc_const"); |
| static ConstString g_sect_name_objc_classlist("__objc_classlist"); |
| static ConstString g_sect_name_cfstring("__cfstring"); |
| |
| static ConstString g_sect_name_dwarf_debug_abbrev("__debug_abbrev"); |
| static ConstString g_sect_name_dwarf_debug_aranges("__debug_aranges"); |
| static ConstString g_sect_name_dwarf_debug_frame("__debug_frame"); |
| static ConstString g_sect_name_dwarf_debug_info("__debug_info"); |
| static ConstString g_sect_name_dwarf_debug_line("__debug_line"); |
| static ConstString g_sect_name_dwarf_debug_loc("__debug_loc"); |
| static ConstString g_sect_name_dwarf_debug_macinfo("__debug_macinfo"); |
| static ConstString g_sect_name_dwarf_debug_names("__debug_names"); |
| static ConstString g_sect_name_dwarf_debug_pubnames("__debug_pubnames"); |
| static ConstString g_sect_name_dwarf_debug_pubtypes("__debug_pubtypes"); |
| static ConstString g_sect_name_dwarf_debug_ranges("__debug_ranges"); |
| static ConstString g_sect_name_dwarf_debug_str("__debug_str"); |
| static ConstString g_sect_name_dwarf_debug_types("__debug_types"); |
| static ConstString g_sect_name_dwarf_apple_names("__apple_names"); |
| static ConstString g_sect_name_dwarf_apple_types("__apple_types"); |
| static ConstString g_sect_name_dwarf_apple_namespaces("__apple_namespac"); |
| static ConstString g_sect_name_dwarf_apple_objc("__apple_objc"); |
| static ConstString g_sect_name_eh_frame("__eh_frame"); |
| static ConstString g_sect_name_compact_unwind("__unwind_info"); |
| static ConstString g_sect_name_text("__text"); |
| static ConstString g_sect_name_data("__data"); |
| static ConstString g_sect_name_go_symtab("__gosymtab"); |
| |
| if (section_name == g_sect_name_dwarf_debug_abbrev) |
| return eSectionTypeDWARFDebugAbbrev; |
| if (section_name == g_sect_name_dwarf_debug_aranges) |
| return eSectionTypeDWARFDebugAranges; |
| if (section_name == g_sect_name_dwarf_debug_frame) |
| return eSectionTypeDWARFDebugFrame; |
| if (section_name == g_sect_name_dwarf_debug_info) |
| return eSectionTypeDWARFDebugInfo; |
| if (section_name == g_sect_name_dwarf_debug_line) |
| return eSectionTypeDWARFDebugLine; |
| if (section_name == g_sect_name_dwarf_debug_loc) |
| return eSectionTypeDWARFDebugLoc; |
| if (section_name == g_sect_name_dwarf_debug_macinfo) |
| return eSectionTypeDWARFDebugMacInfo; |
| if (section_name == g_sect_name_dwarf_debug_names) |
| return eSectionTypeDWARFDebugNames; |
| if (section_name == g_sect_name_dwarf_debug_pubnames) |
| return eSectionTypeDWARFDebugPubNames; |
| if (section_name == g_sect_name_dwarf_debug_pubtypes) |
| return eSectionTypeDWARFDebugPubTypes; |
| if (section_name == g_sect_name_dwarf_debug_ranges) |
| return eSectionTypeDWARFDebugRanges; |
| if (section_name == g_sect_name_dwarf_debug_str) |
| return eSectionTypeDWARFDebugStr; |
| if (section_name == g_sect_name_dwarf_debug_types) |
| return eSectionTypeDWARFDebugTypes; |
| if (section_name == g_sect_name_dwarf_apple_names) |
| return eSectionTypeDWARFAppleNames; |
| if (section_name == g_sect_name_dwarf_apple_types) |
| return eSectionTypeDWARFAppleTypes; |
| if (section_name == g_sect_name_dwarf_apple_namespaces) |
| return eSectionTypeDWARFAppleNamespaces; |
| if (section_name == g_sect_name_dwarf_apple_objc) |
| return eSectionTypeDWARFAppleObjC; |
| if (section_name == g_sect_name_objc_selrefs) |
| return eSectionTypeDataCStringPointers; |
| if (section_name == g_sect_name_objc_msgrefs) |
| return eSectionTypeDataObjCMessageRefs; |
| if (section_name == g_sect_name_eh_frame) |
| return eSectionTypeEHFrame; |
| if (section_name == g_sect_name_compact_unwind) |
| return eSectionTypeCompactUnwind; |
| if (section_name == g_sect_name_cfstring) |
| return eSectionTypeDataObjCCFStrings; |
| if (section_name == g_sect_name_go_symtab) |
| return eSectionTypeGoSymtab; |
| if (section_name == g_sect_name_objc_data || |
| section_name == g_sect_name_objc_classrefs || |
| section_name == g_sect_name_objc_superrefs || |
| section_name == g_sect_name_objc_const || |
| section_name == g_sect_name_objc_classlist) { |
| return eSectionTypeDataPointers; |
| } |
| |
| switch (mach_sect_type) { |
| // TODO: categorize sections by other flags for regular sections |
| case S_REGULAR: |
| if (section_name == g_sect_name_text) |
| return eSectionTypeCode; |
| if (section_name == g_sect_name_data) |
| return eSectionTypeData; |
| return eSectionTypeOther; |
| case S_ZEROFILL: |
| return eSectionTypeZeroFill; |
| case S_CSTRING_LITERALS: // section with only literal C strings |
| return eSectionTypeDataCString; |
| case S_4BYTE_LITERALS: // section with only 4 byte literals |
| return eSectionTypeData4; |
| case S_8BYTE_LITERALS: // section with only 8 byte literals |
| return eSectionTypeData8; |
| case S_LITERAL_POINTERS: // section with only pointers to literals |
| return eSectionTypeDataPointers; |
| case S_NON_LAZY_SYMBOL_POINTERS: // section with only non-lazy symbol pointers |
| return eSectionTypeDataPointers; |
| case S_LAZY_SYMBOL_POINTERS: // section with only lazy symbol pointers |
| return eSectionTypeDataPointers; |
| case S_SYMBOL_STUBS: // section with only symbol stubs, byte size of stub in |
| // the reserved2 field |
| return eSectionTypeCode; |
| case S_MOD_INIT_FUNC_POINTERS: // section with only function pointers for |
| // initialization |
| return eSectionTypeDataPointers; |
| case S_MOD_TERM_FUNC_POINTERS: // section with only function pointers for |
| // termination |
| return eSectionTypeDataPointers; |
| case S_COALESCED: |
| return eSectionTypeOther; |
| case S_GB_ZEROFILL: |
| return eSectionTypeZeroFill; |
| case S_INTERPOSING: // section with only pairs of function pointers for |
| // interposing |
| return eSectionTypeCode; |
| case S_16BYTE_LITERALS: // section with only 16 byte literals |
| return eSectionTypeData16; |
| case S_DTRACE_DOF: |
| return eSectionTypeDebug; |
| case S_LAZY_DYLIB_SYMBOL_POINTERS: |
| return eSectionTypeDataPointers; |
| default: |
| return eSectionTypeOther; |
| } |
| } |
| |
| struct ObjectFileMachO::SegmentParsingContext { |
| const EncryptedFileRanges EncryptedRanges; |
| lldb_private::SectionList &UnifiedList; |
| uint32_t NextSegmentIdx = 0; |
| uint32_t NextSectionIdx = 0; |
| bool FileAddressesChanged = false; |
| |
| SegmentParsingContext(EncryptedFileRanges EncryptedRanges, |
| lldb_private::SectionList &UnifiedList) |
| : EncryptedRanges(std::move(EncryptedRanges)), UnifiedList(UnifiedList) {} |
| }; |
| |
| void ObjectFileMachO::ProcessSegmentCommand(const load_command &load_cmd_, |
| lldb::offset_t offset, |
| uint32_t cmd_idx, |
| SegmentParsingContext &context) { |
| segment_command_64 load_cmd; |
| memcpy(&load_cmd, &load_cmd_, sizeof(load_cmd_)); |
| |
| if (!m_data.GetU8(&offset, (uint8_t *)load_cmd.segname, 16)) |
| return; |
| |
| ModuleSP module_sp = GetModule(); |
| const bool is_core = GetType() == eTypeCoreFile; |
| const bool is_dsym = (m_header.filetype == MH_DSYM); |
| bool add_section = true; |
| bool add_to_unified = true; |
| ConstString const_segname( |
| load_cmd.segname, |
| std::min<size_t>(strlen(load_cmd.segname), sizeof(load_cmd.segname))); |
| |
| SectionSP unified_section_sp( |
| context.UnifiedList.FindSectionByName(const_segname)); |
| if (is_dsym && unified_section_sp) { |
| if (const_segname == GetSegmentNameLINKEDIT()) { |
| // We need to keep the __LINKEDIT segment private to this object file |
| // only |
| add_to_unified = false; |
| } else { |
| // This is the dSYM file and this section has already been created by the |
| // object file, no need to create it. |
| add_section = false; |
| } |
| } |
| load_cmd.vmaddr = m_data.GetAddress(&offset); |
| load_cmd.vmsize = m_data.GetAddress(&offset); |
| load_cmd.fileoff = m_data.GetAddress(&offset); |
| load_cmd.filesize = m_data.GetAddress(&offset); |
| if (!m_data.GetU32(&offset, &load_cmd.maxprot, 4)) |
| return; |
| |
| SanitizeSegmentCommand(load_cmd, cmd_idx); |
| |
| const uint32_t segment_permissions = GetSegmentPermissions(load_cmd); |
| const bool segment_is_encrypted = |
| (load_cmd.flags & SG_PROTECTED_VERSION_1) != 0; |
| |
| // Keep a list of mach segments around in case we need to get at data that |
| // isn't stored in the abstracted Sections. |
| m_mach_segments.push_back(load_cmd); |
| |
| // Use a segment ID of the segment index shifted left by 8 so they never |
| // conflict with any of the sections. |
| SectionSP segment_sp; |
| if (add_section && (const_segname || is_core)) { |
| segment_sp.reset(new Section( |
| module_sp, // Module to which this section belongs |
| this, // Object file to which this sections belongs |
| ++context.NextSegmentIdx |
| << 8, // Section ID is the 1 based segment index |
| // shifted right by 8 bits as not to collide with any of the 256 |
| // section IDs that are possible |
| const_segname, // Name of this section |
| eSectionTypeContainer, // This section is a container of other |
| // sections. |
| load_cmd.vmaddr, // File VM address == addresses as they are |
| // found in the object file |
| load_cmd.vmsize, // VM size in bytes of this section |
| load_cmd.fileoff, // Offset to the data for this section in |
| // the file |
| load_cmd.filesize, // Size in bytes of this section as found |
| // in the file |
| 0, // Segments have no alignment information |
| load_cmd.flags)); // Flags for this section |
| |
| segment_sp->SetIsEncrypted(segment_is_encrypted); |
| m_sections_ap->AddSection(segment_sp); |
| segment_sp->SetPermissions(segment_permissions); |
| if (add_to_unified) |
| context.UnifiedList.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); |
| |
| // Notify the module that the section addresses have been changed once |
| // we're done so any file-address caches can be updated. |
| context.FileAddressesChanged = true; |
| } |
| } |
| m_sections_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 = context.NextSectionIdx + 1; |
| |
| const uint32_t num_u32s = load_cmd.cmd == LC_SEGMENT ? 7 : 8; |
| for (segment_sect_idx = 0; segment_sect_idx < load_cmd.nsects; |
| ++segment_sect_idx) { |
| if (m_data.GetU8(&offset, (uint8_t *)sect64.sectname, |
| sizeof(sect64.sectname)) == 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 = context.UnifiedList.FindSectionByName(const_segname); |
| if (segment_sp.get()) { |
| Section *segment = segment_sp.get(); |
| // Grow the section size as needed. |
| const lldb::addr_t sect64_min_addr = sect64.addr; |
| const lldb::addr_t sect64_max_addr = sect64_min_addr + sect64.size; |
| const lldb::addr_t curr_seg_byte_size = segment->GetByteSize(); |
| const lldb::addr_t curr_seg_min_addr = segment->GetFileAddress(); |
| const lldb::addr_t curr_seg_max_addr = |
| curr_seg_min_addr + curr_seg_byte_size; |
| if (sect64_min_addr >= curr_seg_min_addr) { |
| const lldb::addr_t new_seg_byte_size = |
| sect64_max_addr - curr_seg_min_addr; |
| // Only grow the section size if needed |
| if (new_seg_byte_size > curr_seg_byte_size) |
| segment->SetByteSize(new_seg_byte_size); |
| } else { |
| // We need to change the base address of the segment and adjust the |
| // child section offsets for all existing children. |
| const lldb::addr_t slide_amount = |
| sect64_min_addr - curr_seg_min_addr; |
| segment->Slide(slide_amount, false); |
| segment->GetChildren().Slide(-slide_amount, false); |
| segment->SetByteSize(curr_seg_max_addr - sect64_min_addr); |
| } |
| |
| // Grow the section size as needed. |
| if (sect64.offset) { |
| const lldb::addr_t segment_min_file_offset = |
| segment->GetFileOffset(); |
| const lldb::addr_t segment_max_file_offset = |
| segment_min_file_offset + segment->GetFileSize(); |
| |
| const lldb::addr_t section_min_file_offset = sect64.offset; |
| const lldb::addr_t section_max_file_offset = |
| section_min_file_offset + sect64.size; |
| const lldb::addr_t new_file_offset = |
| std::min(section_min_file_offset, segment_min_file_offset); |
| const lldb::addr_t new_file_size = |
| std::max(section_max_file_offset, segment_max_file_offset) - |
| new_file_offset; |
| segment->SetFileOffset(new_file_offset); |
| segment->SetFileSize(new_file_size); |
| } |
| } else { |
| // Create a fake section for the section's named segment |
| segment_sp.reset(new Section( |
| segment_sp, // Parent section |
| module_sp, // Module to which this section belongs |
| this, // Object file to which this section belongs |
| ++context.NextSegmentIdx |
| << 8, // Section ID is the 1 based segment index |
| // shifted right by 8 bits as not to |
| // collide with any of the 256 section IDs |
| // that are possible |
| const_segname, // Name of this section |
| eSectionTypeContainer, // This section is a container of |
| // other sections. |
| sect64.addr, // File VM address == addresses as they are |
| // found in the object file |
| sect64.size, // VM size in bytes of this section |
| sect64.offset, // Offset to the data for this section in |
| // the file |
| sect64.offset ? sect64.size : 0, // Size in bytes of |
| // this section as |
| // found in the file |
| sect64.align, |
| load_cmd.flags)); // Flags for this section |
| segment_sp->SetIsFake(true); |
| segment_sp->SetPermissions(segment_permissions); |
| m_sections_ap->AddSection(segment_sp); |
| if (add_to_unified) |
| context.UnifiedList.AddSection(segment_sp); |
| segment_sp->SetIsEncrypted(segment_is_encrypted); |
| } |
| } |
| assert(segment_sp.get()); |
| |
| lldb::SectionType sect_type = GetSectionType(sect64.flags, section_name); |
| |
| SectionSP section_sp(new Section( |
| segment_sp, module_sp, this, ++context.NextSectionIdx, section_name, |
| sect_type, sect64.addr - segment_sp->GetFileAddress(), sect64.size, |
| sect64.offset, sect64.offset == 0 ? 0 : sect64.size, sect64.align, |
| sect64.flags)); |
| // Set the section to be encrypted to match the segment |
| |
| bool section_is_encrypted = false; |
| if (!segment_is_encrypted && load_cmd.filesize != 0) |
| section_is_encrypted = context.EncryptedRanges.FindEntryThatContains( |
| sect64.offset) != NULL; |
| |
| section_sp->SetIsEncrypted(segment_is_encrypted || section_is_encrypted); |
| section_sp->SetPermissions(segment_permissions); |
| segment_sp->GetChildren().AddSection(section_sp); |
| |
| if (segment_sp->IsFake()) { |
| segment_sp.reset(); |
| const_segname.Clear(); |
| } |
| } |
| } |
| if (segment_sp && is_dsym) { |
| if (first_segment_sectID <= context.NextSectionIdx) { |
| lldb::user_id_t sect_uid; |
| for (sect_uid = first_segment_sectID; sect_uid <= context.NextSectionIdx; |
| ++sect_uid) { |
| SectionSP curr_section_sp( |
| segment_sp->GetChildren().FindSectionByID(sect_uid)); |
| SectionSP next_section_sp; |
| if (sect_uid + 1 <= context.NextSectionIdx) |
| next_section_sp = |
| segment_sp->GetChildren().FindSectionByID(sect_uid + 1); |
| |
| if (curr_section_sp.get()) { |
| if (curr_section_sp->GetByteSize() == 0) { |
| if (next_section_sp.get() != NULL) |
| curr_section_sp->SetByteSize(next_section_sp->GetFileAddress() - |
| curr_section_sp->GetFileAddress()); |
| else |
| curr_section_sp->SetByteSize(load_cmd.vmsize); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| void ObjectFileMachO::ProcessDysymtabCommand(const load_command &load_cmd, |
| lldb::offset_t offset) { |
| m_dysymtab.cmd = load_cmd.cmd; |
| m_dysymtab.cmdsize = load_cmd.cmdsize; |
| m_data.GetU32(&offset, &m_dysymtab.ilocalsym, |
| (sizeof(m_dysymtab) / sizeof(uint32_t)) - 2); |
| } |
| |
| void ObjectFileMachO::CreateSections(SectionList &unified_section_list) { |
| if (m_sections_ap) |
| return; |
| |
| m_sections_ap.reset(new SectionList()); |
| |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| // bool dump_sections = false; |
| ModuleSP module_sp(GetModule()); |
| |
| offset = MachHeaderSizeFromMagic(m_header.magic); |
| |
| SegmentParsingContext context(GetEncryptedFileRanges(), unified_section_list); |
| struct load_command load_cmd; |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const lldb::offset_t load_cmd_offset = offset; |
| if (m_data.GetU32(&offset, &load_cmd, 2) == NULL) |
| break; |
| |
| if (load_cmd.cmd == LC_SEGMENT || load_cmd.cmd == LC_SEGMENT_64) |
| ProcessSegmentCommand(load_cmd, offset, i, context); |
| else if (load_cmd.cmd == LC_DYSYMTAB) |
| ProcessDysymtabCommand(load_cmd, offset); |
| |
| offset = load_cmd_offset + load_cmd.cmdsize; |
| } |
| |
| if (context.FileAddressesChanged && module_sp) |
| module_sp->SectionFileAddressesChanged(); |
| } |
| |
| class MachSymtabSectionInfo { |
| public: |
| MachSymtabSectionInfo(SectionList *section_list) |
| : m_section_list(section_list), m_section_infos() { |
| // Get the number of sections down to a depth of 1 to include all segments |
| // and their sections, but no other sections that may be added for debug |
| // map or |
| m_section_infos.resize(section_list->GetNumSections(1)); |
| } |
| |
| SectionSP GetSection(uint8_t n_sect, addr_t file_addr) { |
| if (n_sect == 0) |
| return SectionSP(); |
| if (n_sect < m_section_infos.size()) { |
| if (!m_section_infos[n_sect].section_sp) { |
| SectionSP section_sp(m_section_list->FindSectionByID(n_sect)); |
| m_section_infos[n_sect].section_sp = section_sp; |
| if (section_sp) { |
| m_section_infos[n_sect].vm_range.SetBaseAddress( |
| section_sp->GetFileAddress()); |
| m_section_infos[n_sect].vm_range.SetByteSize( |
| section_sp->GetByteSize()); |
| } else { |
| 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 bool ParseTrieEntries(DataExtractor &data, lldb::offset_t offset, |
| const bool is_arm, |
| std::vector<llvm::StringRef> &nameSlices, |
| std::set<lldb::addr_t> &resolver_addresses, |
| std::vector<TrieEntryWithOffset> &output) { |
| if (!data.ValidOffset(offset)) |
| return true; |
| |
| 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) { |
| e.entry.other = data.GetULEB128(&offset); |
| uint64_t resolver_addr = e.entry.other; |
| if (is_arm) |
| resolver_addr &= THUMB_ADDRESS_BIT_MASK; |
| resolver_addresses.insert(resolver_addr); |
| } 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) { |
| const char *cstr = data.GetCStr(&children_offset); |
| if (cstr) |
| nameSlices.push_back(llvm::StringRef(cstr)); |
| else |
| return false; // Corrupt data |
| lldb::offset_t childNodeOffset = data.GetULEB128(&children_offset); |
| if (childNodeOffset) { |
| if (!ParseTrieEntries(data, childNodeOffset, is_arm, nameSlices, |
| resolver_addresses, output)) { |
| return false; |
| } |
| } |
| nameSlices.pop_back(); |
| } |
| return true; |
| } |
| |
| // Read the UUID out of a dyld_shared_cache file on-disk. |
| UUID ObjectFileMachO::GetSharedCacheUUID(FileSpec dyld_shared_cache, |
| const ByteOrder byte_order, |
| const uint32_t addr_byte_size) { |
| UUID dsc_uuid; |
| DataBufferSP DscData = MapFileData( |
| dyld_shared_cache, sizeof(struct lldb_copy_dyld_cache_header_v1), 0); |
| if (!DscData) |
| return dsc_uuid; |
| DataExtractor dsc_header_data(DscData, byte_order, addr_byte_size); |
| |
| char version_str[7]; |
| lldb::offset_t offset = 0; |
| memcpy(version_str, dsc_header_data.GetData(&offset, 6), 6); |
| version_str[6] = '\0'; |
| if (strcmp(version_str, "dyld_v") == 0) { |
| offset = offsetof(struct lldb_copy_dyld_cache_header_v1, uuid); |
| dsc_uuid = UUID::fromOptionalData( |
| dsc_header_data.GetData(&offset, sizeof(uuid_t)), sizeof(uuid_t)); |
| } |
| Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_SYMBOLS)); |
| if (log && dsc_uuid.IsValid()) { |
| log->Printf("Shared cache %s has UUID %s", dyld_shared_cache.GetPath().c_str(), |
| dsc_uuid.GetAsString().c_str()); |
| } |
| return dsc_uuid; |
| } |
| |
| size_t ObjectFileMachO::ParseSymtab() { |
| static Timer::Category func_cat(LLVM_PRETTY_FUNCTION); |
| Timer scoped_timer(func_cat, "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)); |
| 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_$_"); |
| |
| 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) { |
| addr_t linkedit_load_addr = |
| linkedit_section_sp->GetLoadBaseAddress(&target); |
| if (linkedit_load_addr == LLDB_INVALID_ADDRESS) { |
| // We might be trying to access the symbol table before the |
| // __LINKEDIT's load address has been set in the target. We can't |
| // fail to read the symbol table, so calculate the right address |
| // manually |
| linkedit_load_addr = CalculateSectionLoadAddressForMemoryImage( |
| m_memory_addr, GetMachHeaderSection(), linkedit_section_sp.get()); |
| } |
| |
| const addr_t linkedit_file_offset = |
| linkedit_section_sp->GetFileOffset(); |
| const addr_t symoff_addr = linkedit_load_addr + |
| symtab_load_command.symoff - |
| linkedit_file_offset; |
| strtab_addr = linkedit_load_addr + symtab_load_command.stroff - |
| linkedit_file_offset; |
| |
| 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; |
| addr_t lldb_shared_cache_addr; |
| GetLLDBSharedCacheUUID (lldb_shared_cache_addr, lldb_shared_cache); |
| UUID process_shared_cache; |
| addr_t process_shared_cache_addr; |
| GetProcessSharedCacheUUID(process, process_shared_cache_addr, process_shared_cache); |
| bool use_lldb_cache = true; |
| if (lldb_shared_cache.IsValid() && process_shared_cache.IsValid() && |
| (lldb_shared_cache != process_shared_cache |
| || process_shared_cache_addr != lldb_shared_cache_addr)) { |
| use_lldb_cache = false; |
| } |
| |
| 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) { |
| // Always load dyld - the dynamic linker - from memory if we didn't |
| // find a binary anywhere else. lldb will not register |
| // dylib/framework/bundle loads/unloads if we don't have the dyld |
| // symbols, we force dyld to load from memory despite the user's |
| // target.memory-module-load-level setting. |
| if (memory_module_load_level == eMemoryModuleLoadLevelComplete || |
| m_header.filetype == llvm::MachO::MH_DYLINKER) { |
| DataBufferSP nlist_data_sp( |
| ReadMemory(process_sp, symoff_addr, nlist_data_byte_size)); |
| if (nlist_data_sp) |
| nlist_data.SetData(nlist_data_sp, 0, |
| nlist_data_sp->GetByteSize()); |
| // 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()); |
| } |
| } else 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_DATA_DIRTY = GetSegmentNameDATA_DIRTY(); |
| const ConstString &g_segment_name_DATA_CONST = GetSegmentNameDATA_CONST(); |
| 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 data_dirty_section_sp( |
| section_list->FindSectionByName(g_segment_name_DATA_DIRTY)); |
| SectionSP data_const_section_sp( |
| section_list->FindSectionByName(g_segment_name_DATA_CONST)); |
| SectionSP objc_section_sp( |
| section_list->FindSectionByName(g_segment_name_OBJC)); |
| SectionSP eh_frame_section_sp; |
| if (text_section_sp.get()) |
| eh_frame_section_sp = text_section_sp->GetChildren().FindSectionByName( |
| g_section_name_eh_frame); |
| else |
| eh_frame_section_sp = |
| section_list->FindSectionByName(g_section_name_eh_frame); |
| |
| const bool is_arm = (m_header.cputype == llvm::MachO::CPU_TYPE_ARM); |
| |
| // 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, |
| DWARFCallFrameInfo::EH); |
| DWARFCallFrameInfo::FunctionAddressAndSizeVector functions; |
| eh_frame.GetFunctionAddressAndSizeVector(functions); |
| addr_t text_base_addr = text_section_sp->GetFileAddress(); |
| size_t count = functions.GetSize(); |
| for (size_t i = 0; i < count; ++i) { |
| const DWARFCallFrameInfo::FunctionAddressAndSizeVector::Entry *func = |
| functions.GetEntryAtIndex(i); |
| if (func) { |
| FunctionStarts::Entry function_start_entry; |
| function_start_entry.addr = func->base - text_base_addr; |
| function_starts.Append(function_start_entry); |
| } |
| } |
| } |
| } |
| |
| const size_t function_starts_count = function_starts.GetSize(); |
| |
| // For user process binaries (executables, dylibs, frameworks, bundles), if |
| // we don't have LC_FUNCTION_STARTS/eh_frame section in this binary, we're |
| // going to assume the binary has been stripped. Don't allow assembly |
| // language instruction emulation because we don't know proper function |
| // start boundaries. |
| // |
| // For all other types of binaries (kernels, stand-alone bare board |
| // binaries, kexts), they may not have LC_FUNCTION_STARTS / eh_frame |
| // sections - we should not make any assumptions about them based on that. |
| if (function_starts_count == 0 && CalculateStrata() == eStrataUser) { |
| m_allow_assembly_emulation_unwind_plans = false; |
| Log *unwind_or_symbol_log(lldb_private::GetLogIfAnyCategoriesSet( |
| LIBLLDB_LOG_SYMBOLS | LIBLLDB_LOG_UNWIND)); |
| |
| if (unwind_or_symbol_log) |
| module_sp->LogMessage( |
| unwind_or_symbol_log, |
| "no LC_FUNCTION_STARTS, will not allow assembly profiled unwinds"); |
| } |
| |
| const user_id_t TEXT_eh_frame_sectID = |
| eh_frame_section_sp.get() ? eh_frame_section_sp->GetID() |
| : static_cast<user_id_t>(NO_SECT); |
| |
| 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, is_arm, 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; |
| } |
| } |
| } |
| |
| typedef std::set<ConstString> IndirectSymbols; |
| IndirectSymbols indirect_symbol_names; |
| |
| #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]; |
| char dsc_path_development[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()); |
| |
| snprintf( |
| dsc_path_development, sizeof(dsc_path), "%s%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(), ".development"); |
| |
| FileSpec dsc_nondevelopment_filespec(dsc_path, false); |
| FileSpec dsc_development_filespec(dsc_path_development, false); |
| FileSpec dsc_filespec; |
| |
| UUID dsc_uuid; |
| UUID process_shared_cache_uuid; |
| addr_t process_shared_cache_base_addr; |
| |
| if (process) { |
| GetProcessSharedCacheUUID(process, process_shared_cache_base_addr, process_shared_cache_uuid); |
| } |
| |
| // First see if we can find an exact match for the inferior process |
| // shared cache UUID in the development or non-development shared caches |
| // on disk. |
| if (process_shared_cache_uuid.IsValid()) { |
| if (dsc_development_filespec.Exists()) { |
| UUID dsc_development_uuid = GetSharedCacheUUID( |
| dsc_development_filespec, byte_order, addr_byte_size); |
| if (dsc_development_uuid.IsValid() && |
| dsc_development_uuid == process_shared_cache_uuid) { |
| dsc_filespec = dsc_development_filespec; |
| dsc_uuid = dsc_development_uuid; |
| } |
| } |
| if (!dsc_uuid.IsValid() && dsc_nondevelopment_filespec.Exists()) { |
| UUID dsc_nondevelopment_uuid = GetSharedCacheUUID( |
| dsc_nondevelopment_filespec, byte_order, addr_byte_size); |
| if (dsc_nondevelopment_uuid.IsValid() && |
| dsc_nondevelopment_uuid == process_shared_cache_uuid) { |
| dsc_filespec = dsc_nondevelopment_filespec; |
| dsc_uuid = dsc_nondevelopment_uuid; |
| } |
| } |
| } |
| |
| // Failing a UUID match, prefer the development dyld_shared cache if both |
| // are present. |
| if (!dsc_filespec.Exists()) { |
| if (dsc_development_filespec.Exists()) { |
| dsc_filespec = dsc_development_filespec; |
| } else { |
| dsc_filespec = dsc_nondevelopment_filespec; |
| } |
| } |
| |
| /* 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 dyld shared cache header to find the unmapped symbols |
| |
| DataBufferSP dsc_data_sp = MapFileData( |
| dsc_filespec, sizeof(struct lldb_copy_dyld_cache_header_v1), 0); |
| if (!dsc_uuid.IsValid()) { |
| dsc_uuid = GetSharedCacheUUID(dsc_filespec, byte_order, addr_byte_size); |
| } |
| if (dsc_data_sp) { |
| DataExtractor dsc_header_data(dsc_data_sp, byte_order, addr_byte_size); |
| |
| bool uuid_match = true; |
| if (dsc_uuid.IsValid() && process) { |
| if (process_shared_cache_uuid.IsValid() && |
| dsc_uuid != process_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_v1)) { |
| |
| DataBufferSP dsc_mapping_info_data_sp = MapFileData( |
| dsc_filespec, sizeof(struct lldb_copy_dyld_cache_mapping_info), |
| mappingOffset); |
| |
| 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 |
| DataBufferSP dsc_local_symbols_data_sp = |
| MapFileData(dsc_filespec, localSymbolsSize, localSymbolsOffset); |
| |
| if (dsc_local_symbols_data_sp) { |
| DataExtractor dsc_local_symbols_data(dsc_local_symbols_data_sp, |
| byte_order, addr_byte_size); |
| |
| offset = 0; |
| |
| typedef std::map<ConstString, uint16_t> UndefinedNameToDescMap; |
| typedef std::map<uint32_t, ConstString> SymbolIndexToName; |
| UndefinedNameToDescMap undefined_name_to_desc; |
| SymbolIndexToName reexport_shlib_needs_fixup; |
| |
| // 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; |
| bool set_value = true; |
| |
| assert(sym_idx < num_syms); |
| |
| sym[sym_idx].SetDebug(is_debug); |
| |
| if (is_debug) { |
| switch (nlist.n_type) { |
| case N_GSYM: |
| // global symbol: name,,NO_SECT,type,0 |
| // Sometimes the N_GSYM value contains the address. |
| |
| // FIXME: In the .o files, we have a GSYM and a debug |
| // symbol for all the ObjC data. They |
| // have the same address, but we want to ensure that |
| // we always find only the real symbol, 'cause we |
| // don't currently correctly attribute the |
| // GSYM one to the ObjCClass/Ivar/MetaClass |
| // symbol type. This is a temporary hack to make |
| // sure the ObjectiveC symbols get treated correctly. |
| // To do this right, we should coalesce all the GSYM |
| // & global symbols that have the same address. |
| |
| is_gsym = true; |
| sym[sym_idx].SetExternal(true); |
| |
| if (symbol_name && symbol_name[0] == '_' && |
| symbol_name[1] == 'O') { |
| llvm::StringRef symbol_name_ref(symbol_name); |
| if (symbol_name_ref.startswith( |
| g_objc_v2_prefix_class)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = |
| symbol_name + g_objc_v2_prefix_class.size(); |
| type = eSymbolTypeObjCClass; |
| demangled_is_synthesized = true; |
| |
| } else if (symbol_name_ref.startswith( |
| g_objc_v2_prefix_metaclass)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = symbol_name + |
| g_objc_v2_prefix_metaclass.size(); |
| type = eSymbolTypeObjCMetaClass; |
| demangled_is_synthesized = true; |
| } else if (symbol_name_ref.startswith( |
| g_objc_v2_prefix_ivar)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = |
| symbol_name + g_objc_v2_prefix_ivar.size(); |
| type = eSymbolTypeObjCIVar; |
| demangled_is_synthesized = true; |
| } |
| } else { |
| if (nlist.n_value != 0) |
| symbol_section = section_info.GetSection( |
| nlist.n_sect, nlist.n_value); |
| type = eSymbolTypeData; |
| } |
| break; |
| |
| case N_FNAME: |
| // procedure name (f77 kludge): name,,NO_SECT,0,0 |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_FUN: |
| // procedure: name,,n_sect,linenumber,address |
| if (symbol_name) { |
| type = eSymbolTypeCode; |
| symbol_section = section_info.GetSection( |
| nlist.n_sect, nlist.n_value); |
| |
| N_FUN_addr_to_sym_idx.insert( |
| std::make_pair(nlist.n_value, sym_idx)); |
| // We use the current number of symbols in the |
| // symbol table in lieu of using nlist_idx in case |
| // we ever start trimming entries out |
| N_FUN_indexes.push_back(sym_idx); |
| } else { |
| type = eSymbolTypeCompiler; |
| |
| if (!N_FUN_indexes.empty()) { |
| // Copy the size of the function into the |
| // original |
| // STAB entry so we don't have |
| // to hunt for it later |
| symtab->SymbolAtIndex(N_FUN_indexes.back()) |
| ->SetByteSize(nlist.n_value); |
| N_FUN_indexes.pop_back(); |
| // We don't really need the end function STAB as |
| // it contains the size which we already placed |
| // with the original symbol, so don't add it if |
| // we want a minimal symbol table |
| add_nlist = false; |
| } |
| } |
| break; |
| |
| case N_STSYM: |
| // static symbol: name,,n_sect,type,address |
| N_STSYM_addr_to_sym_idx.insert( |
| std::make_pair(nlist.n_value, sym_idx)); |
| symbol_section = section_info.GetSection( |
| nlist.n_sect, nlist.n_value); |
| if (symbol_name && symbol_name[0]) { |
| type = ObjectFile::GetSymbolTypeFromName( |
| symbol_name + 1, eSymbolTypeData); |
| } |
| break; |
| |
| case N_LCSYM: |
| // .lcomm symbol: name,,n_sect,type,address |
| symbol_section = section_info.GetSection( |
| nlist.n_sect, nlist.n_value); |
| type = eSymbolTypeCommonBlock; |
| break; |
| |
| case N_BNSYM: |
| // We use the current number of symbols in the symbol |
| // table in lieu of using nlist_idx in case we ever |
| // start trimming entries out Skip these if we want |
| // minimal symbol tables |
| add_nlist = false; |
| break; |
| |
| case N_ENSYM: |
| // Set the size of the N_BNSYM to the terminating |
| // index of this N_ENSYM so that we can always skip |
| // the entire symbol if we need to navigate more |
| // quickly at the source level when parsing STABS |
| // Skip these if we want minimal symbol tables |
| add_nlist = false; |
| break; |
| |
| case N_OPT: |
| // emitted with gcc2_compiled and in gcc source |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_RSYM: |
| // register sym: name,,NO_SECT,type,register |
| type = eSymbolTypeVariable; |
| break; |
| |
| case N_SLINE: |
| // src line: 0,,n_sect,linenumber,address |
| symbol_section = section_info.GetSection( |
| nlist.n_sect, nlist.n_value); |
| type = eSymbolTypeLineEntry; |
| break; |
| |
| case N_SSYM: |
| // structure elt: name,,NO_SECT,type,struct_offset |
| type = eSymbolTypeVariableType; |
| break; |
| |
| case N_SO: |
| // source file name |
| type = eSymbolTypeSourceFile; |
| if (symbol_name == NULL) { |
| add_nlist = false; |
| if (N_SO_index != UINT32_MAX) { |
| // Set the size of the N_SO to the terminating |
| // index of this N_SO so that we can always skip |
| // the entire N_SO if we need to navigate more |
| // quickly at the source level when parsing STABS |
| symbol_ptr = symtab->SymbolAtIndex(N_SO_index); |
| symbol_ptr->SetByteSize(sym_idx); |
| symbol_ptr->SetSizeIsSibling(true); |
| } |
| N_NSYM_indexes.clear(); |
| N_INCL_indexes.clear(); |
| N_BRAC_indexes.clear(); |
| N_COMM_indexes.clear(); |
| N_FUN_indexes.clear(); |
| N_SO_index = UINT32_MAX; |
| } else { |
| // We use the current number of symbols in the |
| // symbol table in lieu of using nlist_idx in case |
| // we ever start trimming entries out |
| const bool N_SO_has_full_path = |
| symbol_name[0] == '/'; |
| if (N_SO_has_full_path) { |
| if ((N_SO_index == sym_idx - 1) && |
| ((sym_idx - 1) < num_syms)) { |
| // We have two consecutive N_SO entries where |
| // the first contains a directory and the |
| // second contains a full path. |
| sym[sym_idx - 1].GetMangled().SetValue( |
| ConstString(symbol_name), false); |
| m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1; |
| add_nlist = false; |
| } else { |
| // This is the first entry in a N_SO that |
| // contains a directory or |
| // a full path to the source file |
| N_SO_index = sym_idx; |
| } |
| } else if ((N_SO_index == sym_idx - 1) && |
| ((sym_idx - 1) < num_syms)) { |
| // This is usually the second N_SO entry that |
| // contains just the filename, so here we combine |
| // it with the first one if we are minimizing the |
| // symbol table |
| const char *so_path = |
| sym[sym_idx - 1] |
| .GetMangled() |
| .GetDemangledName( |
| lldb::eLanguageTypeUnknown) |
| .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: { |
| const char *reexport_name_cstr = |
| strtab_data.PeekCStr(nlist.n_value); |
| if (reexport_name_cstr && reexport_name_cstr[0]) { |
| type = eSymbolTypeReExported; |
| ConstString reexport_name( |
| reexport_name_cstr + |
| ((reexport_name_cstr[0] == '_') ? 1 : 0)); |
| sym[sym_idx].SetReExportedSymbolName(reexport_name); |
| set_value = false; |
| reexport_shlib_needs_fixup[sym_idx] = reexport_name; |
| indirect_symbol_names.insert( |
| ConstString(symbol_name + |
| ((symbol_name[0] == '_') ? 1 : 0))); |
| } else |
| type = eSymbolTypeUndefined; |
| } break; |
| |
| case N_UNDF: |
| if (symbol_name && symbol_name[0]) { |
| ConstString undefined_name( |
| symbol_name + |
| ((symbol_name[0] == '_') ? 1 : 0)); |
| undefined_name_to_desc[undefined_name] = |
| nlist.n_desc; |
| } |
| // Fall through |
| case N_PBUD: |
| type = eSymbolTypeUndefined; |
| break; |
| |
| case N_ABS: |
| type = eSymbolTypeAbsolute; |
| break; |
| |
| case N_SECT: { |
| symbol_section = section_info.GetSection( |
| nlist.n_sect, nlist.n_value); |
| |
| if (symbol_section == NULL) { |
| // TODO: warn about this? |
| add_nlist = false; |
| break; |
| } |
| |
| if (TEXT_eh_frame_sectID == nlist.n_sect) { |
| type = eSymbolTypeException; |
| } else { |
| uint32_t section_type = |
| symbol_section->Get() & SECTION_TYPE; |
| |
| switch (section_type) { |
| case S_CSTRING_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only literal C strings |
| case S_4BYTE_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only 4 byte literals |
| case S_8BYTE_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only 8 byte literals |
| case S_LITERAL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only pointers to literals |
| case S_NON_LAZY_SYMBOL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only non-lazy symbol |
| // pointers |
| case S_LAZY_SYMBOL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only lazy symbol pointers |
| case S_SYMBOL_STUBS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only symbol stubs, byte |
| // size of stub in the reserved2 field |
| case S_MOD_INIT_FUNC_POINTERS: |
| type = eSymbolTypeCode; |
| break; // section with only function pointers for |
| // initialization |
| case S_MOD_TERM_FUNC_POINTERS: |
| type = eSymbolTypeCode; |
| break; // section with only function pointers for |
| // termination |
| case S_INTERPOSING: |
| type = eSymbolTypeTrampoline; |
| break; // section with only pairs of function |
| // pointers for interposing |
| case S_16BYTE_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only 16 byte literals |
| case S_DTRACE_DOF: |
| type = eSymbolTypeInstrumentation; |
| break; |
| case S_LAZY_DYLIB_SYMBOL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; |
| default: |
| switch (symbol_section->GetType()) { |
| case lldb::eSectionTypeCode: |
| type = eSymbolTypeCode; |
| break; |
| case eSectionTypeData: |
| case eSectionTypeDataCString: // Inlined C string |
| // data |
| case eSectionTypeDataCStringPointers: // Pointers |
| // to C |
| // string |
| // data |
| case eSectionTypeDataSymbolAddress: // Address of |
| // a symbol in |
| // the symbol |
| // table |
| case eSectionTypeData4: |
| case eSectionTypeData8: |
| case eSectionTypeData16: |
| type = eSymbolTypeData; |
| break; |
| default: |
| break; |
| } |
| break; |
| } |
| |
| if (type == eSymbolTypeInvalid) { |
| const char *symbol_sect_name = |
| symbol_section->GetName().AsCString(); |
| if (symbol_section->IsDescendant( |
| text_section_sp.get())) { |
| if (symbol_section->IsClear( |
| S_ATTR_PURE_INSTRUCTIONS | |
| S_ATTR_SELF_MODIFYING_CODE | |
| S_ATTR_SOME_INSTRUCTIONS)) |
| type = eSymbolTypeData; |
| else |
| type = eSymbolTypeCode; |
| } else if (symbol_section->IsDescendant( |
| data_section_sp.get()) || |
| symbol_section->IsDescendant( |
| data_dirty_section_sp.get()) || |
| symbol_section->IsDescendant( |
| data_const_section_sp.get())) { |
| if (symbol_sect_name && |
| ::strstr(symbol_sect_name, "__objc") == |
| symbol_sect_name) { |
| type = eSymbolTypeRuntime; |
| |
| if (symbol_name) { |
| llvm::StringRef symbol_name_ref( |
| symbol_name); |
| if (symbol_name_ref.startswith("_OBJC_")) { |
| 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) { |
| const char *gsym_name = |
| sym[sym_idx] |
| .GetMangled() |
| .GetName(lldb::eLanguageTypeUnknown, |
| Mangled::ePreferMangled) |
| .GetCString(); |
| if (gsym_name) |
| N_GSYM_name_to_sym_idx[gsym_name] = sym_idx; |
| } |
| } |
| } |
| if (symbol_section) { |
| const addr_t section_file_addr = |
| symbol_section->GetFileAddress(); |
| if (symbol_byte_size == 0 && |
| function_starts_count > 0) { |
| addr_t symbol_lookup_file_addr = nlist.n_value; |
| // Do an exact address match for non-ARM addresses, |
| // else get the closest since the symbol might be a |
| // thumb symbol which has an address with bit zero |
| // set |
| FunctionStarts::Entry *func_start_entry = |
| function_starts.FindEntry( |
| symbol_lookup_file_addr, !is_arm); |
| if (is_arm && func_start_entry) { |
| // Verify that the function start address is the |
| // symbol address (ARM) or the symbol address + 1 |
| // (thumb) |
| if (func_start_entry->addr != |
| symbol_lookup_file_addr && |
| func_start_entry->addr != |
| (symbol_lookup_file_addr + 1)) { |
| // Not the right entry, NULL it out... |
| func_start_entry = NULL; |
| } |
| } |
| if (func_start_entry) { |
| func_start_entry->data = true; |
| |
| addr_t symbol_file_addr = func_start_entry->addr; |
| uint32_t symbol_flags = 0; |
| if (is_arm) { |
| if (symbol_file_addr & 1) |
| symbol_flags = |
| MACHO_NLIST_ARM_SYMBOL_IS_THUMB; |
| symbol_file_addr &= THUMB_ADDRESS_BIT_MASK; |
| } |
| |
| const FunctionStarts::Entry |
| *next_func_start_entry = |
| function_starts.FindNextEntry( |
| func_start_entry); |
| const addr_t section_end_file_addr = |
| section_file_addr + |
| symbol_section->GetByteSize(); |
| if (next_func_start_entry) { |
| addr_t next_symbol_file_addr = |
| next_func_start_entry->addr; |
| // Be sure the clear the Thumb address bit when |
| // we calculate the size from the current and |
| // next address |
| if (is_arm) |
| next_symbol_file_addr &= |
| THUMB_ADDRESS_BIT_MASK; |
| symbol_byte_size = std::min<lldb::addr_t>( |
| next_symbol_file_addr - symbol_file_addr, |
| section_end_file_addr - symbol_file_addr); |
| } else { |
| symbol_byte_size = |
| section_end_file_addr - symbol_file_addr; |
| } |
| } |
| } |
| symbol_value -= section_file_addr; |
| } |
| |
| if (is_debug == false) { |
| if (type == eSymbolTypeCode) { |
| // See if we can find a N_FUN entry for any code |
| // symbols. If we do find a match, and the name |
| // matches, then we can merge the two into just the |
| // function symbol to avoid duplicate entries in |
| // the symbol table |
| 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( |
| lldb::eLanguageTypeUnknown, |
| Mangled::ePreferMangled) == |
| sym[pos->second].GetMangled().GetName( |
| lldb::eLanguageTypeUnknown, |
| Mangled::ePreferMangled)) { |
| m_nlist_idx_to_sym_idx[nlist_idx] = |
| pos->second; |
| // We just need the flags from the linker |
| // symbol, so put these flags |
| // into the N_FUN flags to avoid duplicate |
| // symbols in the symbol table |
| sym[pos->second].SetExternal( |
| sym[sym_idx].IsExternal()); |
| sym[pos->second].SetFlags(nlist.n_type << 16 | |
| nlist.n_desc); |
| if (resolver_addresses.find(nlist.n_value) != |
| resolver_addresses.end()) |
| sym[pos->second].SetType( |
| eSymbolTypeResolver); |
| sym[sym_idx].Clear(); |
| found_it = true; |
| break; |
| } |
| } |
| if (found_it) |
| continue; |
| } else { |
| if (resolver_addresses.find(nlist.n_value) != |
| resolver_addresses.end()) |
| type = eSymbolTypeResolver; |
| } |
| } else if (type == eSymbolTypeData || |
| type == eSymbolTypeObjCClass || |
| type == eSymbolTypeObjCMetaClass || |
| type == eSymbolTypeObjCIVar) { |
| // See if we can find a N_STSYM entry for any data |
| // symbols. If we do find a match, and the name |
| // matches, then we can merge the two into just the |
| // Static symbol to avoid duplicate entries in the |
| // symbol table |
| 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( |
| lldb::eLanguageTypeUnknown, |
| Mangled::ePreferMangled) == |
| sym[pos->second].GetMangled().GetName( |
| lldb::eLanguageTypeUnknown, |
| Mangled::ePreferMangled)) { |
| m_nlist_idx_to_sym_idx[nlist_idx] = |
| pos->second; |
| // We just need the flags from the linker |
| // symbol, so put these flags |
| // into the N_STSYM flags to avoid duplicate |
| // symbols in the symbol table |
| sym[pos->second].SetExternal( |
| sym[sym_idx].IsExternal()); |
| sym[pos->second].SetFlags(nlist.n_type << 16 | |
| nlist.n_desc); |
| sym[sym_idx].Clear(); |
| found_it = true; |
| break; |
| } |
| } |
| if (found_it) |
| continue; |
| } else { |
| const char *gsym_name = |
| sym[sym_idx] |
| .GetMangled() |
| .GetName(lldb::eLanguageTypeUnknown, |
| Mangled::ePreferMangled) |
| .GetCString(); |
| if (gsym_name) { |
| // Combine N_GSYM stab entries with the non |
| // stab symbol |
| ConstNameToSymbolIndexMap::const_iterator pos = |
| N_GSYM_name_to_sym_idx.find(gsym_name); |
| if (pos != N_GSYM_name_to_sym_idx.end()) { |
| const uint32_t GSYM_sym_idx = pos->second; |
| m_nlist_idx_to_sym_idx[nlist_idx] = |
| GSYM_sym_idx; |
| // Copy the address, because often the N_GSYM |
| // address has an invalid address of zero |
| // when the global is a common symbol |
| sym[GSYM_sym_idx].GetAddressRef().SetSection( |
| symbol_section); |
| sym[GSYM_sym_idx].GetAddressRef().SetOffset( |
| symbol_value); |
| // We just need the flags from the linker |
| // symbol, so put these flags |
| // into the N_GSYM flags to avoid duplicate |
| // symbols in the symbol table |
| sym[GSYM_sym_idx].SetFlags( |
| nlist.n_type << 16 | nlist.n_desc); |
| sym[sym_idx].Clear(); |
| continue; |
| } |
| } |
| } |
| } |
| } |
| |
| sym[sym_idx].SetID(nlist_idx); |
| sym[sym_idx].SetType(type); |
| if (set_value) { |
| sym[sym_idx].GetAddressRef().SetSection( |
| symbol_section); |
| sym[sym_idx].GetAddressRef().SetOffset(symbol_value); |
| } |
| 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 |
| } |
| } |
| |
| for (const auto &pos : reexport_shlib_needs_fixup) { |
| const auto undef_pos = undefined_name_to_desc.find(pos.second); |
| if (undef_pos != undefined_name_to_desc.end()) { |
| const uint8_t dylib_ordinal = |
| llvm::MachO::GET_LIBRARY_ORDINAL(undef_pos->second); |
| if (dylib_ordinal > 0 && |
| dylib_ordinal < dylib_files.GetSize()) |
| sym[pos.first].SetReExportedSymbolSharedLibrary( |
| dylib_files.GetFileSpecAtIndex(dylib_ordinal - 1)); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| // 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; |
| } |
| |
| typedef std::map<ConstString, uint16_t> UndefinedNameToDescMap; |
| typedef std::map<uint32_t, ConstString> SymbolIndexToName; |
| UndefinedNameToDescMap undefined_name_to_desc; |
| SymbolIndexToName reexport_shlib_needs_fixup; |
| 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; |
| Status 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; |
| bool set_value = true; |
| assert(sym_idx < num_syms); |
| |
| sym[sym_idx].SetDebug(is_debug); |
| |
| if (is_debug) { |
| switch (nlist.n_type) { |
| case N_GSYM: |
| // global symbol: name,,NO_SECT,type,0 |
| // Sometimes the N_GSYM value contains the address. |
| |
| // FIXME: In the .o files, we have a GSYM and a debug symbol for all |
| // the ObjC data. They |
| // have the same address, but we want to ensure that we always find |
| // only the real symbol, 'cause we don't currently correctly |
| // attribute the GSYM one to the ObjCClass/Ivar/MetaClass symbol |
| // type. This is a temporary hack to make sure the ObjectiveC |
| // symbols get treated correctly. To do this right, we should |
| // coalesce all the GSYM & global symbols that have the same |
| // address. |
| is_gsym = true; |
| sym[sym_idx].SetExternal(true); |
| |
| if (symbol_name && symbol_name[0] == '_' && symbol_name[1] == 'O') { |
| llvm::StringRef symbol_name_ref(symbol_name); |
| if (symbol_name_ref.startswith(g_objc_v2_prefix_class)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = symbol_name + g_objc_v2_prefix_class.size(); |
| type = eSymbolTypeObjCClass; |
| demangled_is_synthesized = true; |
| |
| } else if (symbol_name_ref.startswith( |
| g_objc_v2_prefix_metaclass)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = symbol_name + g_objc_v2_prefix_metaclass.size(); |
| type = eSymbolTypeObjCMetaClass; |
| demangled_is_synthesized = true; |
| } else if (symbol_name_ref.startswith(g_objc_v2_prefix_ivar)) { |
| symbol_name_non_abi_mangled = symbol_name + 1; |
| symbol_name = symbol_name + g_objc_v2_prefix_ivar.size(); |
| type = eSymbolTypeObjCIVar; |
| demangled_is_synthesized = true; |
| } |
| } else { |
| if (nlist.n_value != 0) |
| symbol_section = |
| section_info.GetSection(nlist.n_sect, nlist.n_value); |
| type = eSymbolTypeData; |
| } |
| break; |
| |
| case N_FNAME: |
| // procedure name (f77 kludge): name,,NO_SECT,0,0 |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_FUN: |
| // procedure: name,,n_sect,linenumber,address |
| if (symbol_name) { |
| type = eSymbolTypeCode; |
| symbol_section = |
| section_info.GetSection(nlist.n_sect, nlist.n_value); |
| |
| N_FUN_addr_to_sym_idx.insert( |
| std::make_pair(nlist.n_value, sym_idx)); |
| // We use the current number of symbols in the symbol table in |
| // lieu of using nlist_idx in case we ever start trimming entries |
| // out |
| N_FUN_indexes.push_back(sym_idx); |
| } else { |
| type = eSymbolTypeCompiler; |
| |
| if (!N_FUN_indexes.empty()) { |
| // Copy the size of the function into the original STAB entry |
| // so we don't have to hunt for it later |
| symtab->SymbolAtIndex(N_FUN_indexes.back()) |
| ->SetByteSize(nlist.n_value); |
| N_FUN_indexes.pop_back(); |
| // We don't really need the end function STAB as it contains |
| // the size which we already placed with the original symbol, |
| // so don't add it if we want a minimal symbol table |
| add_nlist = false; |
| } |
| } |
| break; |
| |
| case N_STSYM: |
| // static symbol: name,,n_sect,type,address |
| N_STSYM_addr_to_sym_idx.insert( |
| std::make_pair(nlist.n_value, sym_idx)); |
| symbol_section = |
| section_info.GetSection(nlist.n_sect, nlist.n_value); |
| if (symbol_name && symbol_name[0]) { |
| type = ObjectFile::GetSymbolTypeFromName(symbol_name + 1, |
| eSymbolTypeData); |
| } |
| break; |
| |
| case N_LCSYM: |
| // .lcomm symbol: name,,n_sect,type,address |
| symbol_section = |
| section_info.GetSection(nlist.n_sect, nlist.n_value); |
| type = eSymbolTypeCommonBlock; |
| break; |
| |
| case N_BNSYM: |
| // We use the current number of symbols in the symbol table in lieu |
| // of using nlist_idx in case we ever start trimming entries out |
| // Skip these if we want minimal symbol tables |
| add_nlist = false; |
| break; |
| |
| case N_ENSYM: |
| // Set the size of the N_BNSYM to the terminating index of this |
| // N_ENSYM so that we can always skip the entire symbol if we need |
| // to navigate more quickly at the source level when parsing STABS |
| // Skip these if we want minimal symbol tables |
| add_nlist = false; |
| break; |
| |
| case N_OPT: |
| // emitted with gcc2_compiled and in gcc source |
| type = eSymbolTypeCompiler; |
| break; |
| |
| case N_RSYM: |
| // register sym: name,,NO_SECT,type,register |
| type = eSymbolTypeVariable; |
| break; |
| |
| case N_SLINE: |
| // src line: 0,,n_sect,linenumber,address |
| symbol_section = |
| section_info.GetSection(nlist.n_sect, nlist.n_value); |
| type = eSymbolTypeLineEntry; |
| break; |
| |
| case N_SSYM: |
| // structure elt: name,,NO_SECT,type,struct_offset |
| type = eSymbolTypeVariableType; |
| break; |
| |
| case N_SO: |
| // source file name |
| type = eSymbolTypeSourceFile; |
| if (symbol_name == NULL) { |
| add_nlist = false; |
| if (N_SO_index != UINT32_MAX) { |
| // Set the size of the N_SO to the terminating index of this |
| // N_SO so that we can always skip the entire N_SO if we need |
| // to navigate more quickly at the source level when parsing |
| // STABS |
| symbol_ptr = symtab->SymbolAtIndex(N_SO_index); |
| symbol_ptr->SetByteSize(sym_idx); |
| symbol_ptr->SetSizeIsSibling(true); |
| } |
| N_NSYM_indexes.clear(); |
| N_INCL_indexes.clear(); |
| N_BRAC_indexes.clear(); |
| N_COMM_indexes.clear(); |
| N_FUN_indexes.clear(); |
| N_SO_index = UINT32_MAX; |
| } else { |
| // We use the current number of symbols in the symbol table in |
| // lieu of using nlist_idx in case we ever start trimming entries |
| // out |
| const bool N_SO_has_full_path = symbol_name[0] == '/'; |
| if (N_SO_has_full_path) { |
| if ((N_SO_index == sym_idx - 1) && ((sym_idx - 1) < num_syms)) { |
| // We have two consecutive N_SO entries where the first |
| // contains a directory and the second contains a full path. |
| sym[sym_idx - 1].GetMangled().SetValue( |
| ConstString(symbol_name), false); |
| m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1; |
| add_nlist = false; |
| } else { |
| // This is the first entry in a N_SO that contains a |
| // directory or a full path to the source file |
| N_SO_index = sym_idx; |
| } |
| } else if ((N_SO_index == sym_idx - 1) && |
| ((sym_idx - 1) < num_syms)) { |
| // This is usually the second N_SO entry that contains just the |
| // filename, so here we combine it with the first one if we are |
| // minimizing the symbol table |
| const char *so_path = |
| sym[sym_idx - 1] |
| .GetMangled() |
| .GetDemangledName(lldb::eLanguageTypeUnknown) |
| .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, |
| FileSpec::Style::native); |
| 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); |
| LLVM_FALLTHROUGH; |
| |
| case N_ECOMM: |
| // end common: name,,n_sect,0,0 |
| // Set the size of the N_BCOMM to the terminating index of this |
| // N_ECOMM/N_ECOML so that we can always skip the entire symbol if |
| // we need to navigate more quickly at the source level when |
| // parsing STABS |
| if (!N_COMM_indexes.empty()) { |
| symbol_ptr = symtab->SymbolAtIndex(N_COMM_indexes.back()); |
| symbol_ptr->SetByteSize(sym_idx + 1); |
| symbol_ptr->SetSizeIsSibling(true); |
| N_COMM_indexes.pop_back(); |
| } |
| type = eSymbolTypeScopeEnd; |
| break; |
| |
| case N_LENG: |
| // second stab entry with length information |
| type = eSymbolTypeAdditional; |
| break; |
| |
| default: |
| break; |
| } |
| } else { |
| // uint8_t n_pext = N_PEXT & nlist.n_type; |
| uint8_t n_type = N_TYPE & nlist.n_type; |
| sym[sym_idx].SetExternal((N_EXT & nlist.n_type) != 0); |
| |
| switch (n_type) { |
| case N_INDR: { |
| const char *reexport_name_cstr = |
| strtab_data.PeekCStr(nlist.n_value); |
| if (reexport_name_cstr && reexport_name_cstr[0]) { |
| type = eSymbolTypeReExported; |
| ConstString reexport_name( |
| reexport_name_cstr + |
| ((reexport_name_cstr[0] == '_') ? 1 : 0)); |
| sym[sym_idx].SetReExportedSymbolName(reexport_name); |
| set_value = false; |
| reexport_shlib_needs_fixup[sym_idx] = reexport_name; |
| indirect_symbol_names.insert( |
| ConstString(symbol_name + ((symbol_name[0] == '_') ? 1 : 0))); |
| } else |
| type = eSymbolTypeUndefined; |
| } break; |
| |
| case N_UNDF: |
| if (symbol_name && symbol_name[0]) { |
| ConstString undefined_name(symbol_name + |
| ((symbol_name[0] == '_') ? 1 : 0)); |
| undefined_name_to_desc[undefined_name] = nlist.n_desc; |
| } |
| LLVM_FALLTHROUGH; |
| |
| case N_PBUD: |
| type = eSymbolTypeUndefined; |
| break; |
| |
| case N_ABS: |
| type = eSymbolTypeAbsolute; |
| break; |
| |
| case N_SECT: { |
| symbol_section = |
| section_info.GetSection(nlist.n_sect, nlist.n_value); |
| |
| if (!symbol_section) { |
| // TODO: warn about this? |
| add_nlist = false; |
| break; |
| } |
| |
| if (TEXT_eh_frame_sectID == nlist.n_sect) { |
| type = eSymbolTypeException; |
| } else { |
| uint32_t section_type = symbol_section->Get() & SECTION_TYPE; |
| |
| switch (section_type) { |
| case S_CSTRING_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only literal C strings |
| case S_4BYTE_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only 4 byte literals |
| case S_8BYTE_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only 8 byte literals |
| case S_LITERAL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only pointers to literals |
| case S_NON_LAZY_SYMBOL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only non-lazy symbol pointers |
| case S_LAZY_SYMBOL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only lazy symbol pointers |
| case S_SYMBOL_STUBS: |
| type = eSymbolTypeTrampoline; |
| break; // section with only symbol stubs, byte size of stub in |
| // the reserved2 field |
| case S_MOD_INIT_FUNC_POINTERS: |
| type = eSymbolTypeCode; |
| break; // section with only function pointers for initialization |
| case S_MOD_TERM_FUNC_POINTERS: |
| type = eSymbolTypeCode; |
| break; // section with only function pointers for termination |
| case S_INTERPOSING: |
| type = eSymbolTypeTrampoline; |
| break; // section with only pairs of function pointers for |
| // interposing |
| case S_16BYTE_LITERALS: |
| type = eSymbolTypeData; |
| break; // section with only 16 byte literals |
| case S_DTRACE_DOF: |
| type = eSymbolTypeInstrumentation; |
| break; |
| case S_LAZY_DYLIB_SYMBOL_POINTERS: |
| type = eSymbolTypeTrampoline; |
| break; |
| default: |
| switch (symbol_section->GetType()) { |
| case lldb::eSectionTypeCode: |
| type = eSymbolTypeCode; |
| break; |
| case eSectionTypeData: |
| case eSectionTypeDataCString: // Inlined C string data |
| case eSectionTypeDataCStringPointers: // Pointers to C string |
| // data |
| case eSectionTypeDataSymbolAddress: // Address of a symbol in |
| // the symbol table |
| case eSectionTypeData4: |
| case eSectionTypeData8: |
| case eSectionTypeData16: |
| type = eSymbolTypeData; |
| break; |
| default: |
| break; |
| } |
| break; |
| } |
| |
| if (type == eSymbolTypeInvalid) { |
| const char *symbol_sect_name = |
| symbol_section->GetName().AsCString(); |
| if (symbol_section->IsDescendant(text_section_sp.get())) { |
| if (symbol_section->IsClear(S_ATTR_PURE_INSTRUCTIONS | |
| S_ATTR_SELF_MODIFYING_CODE | |
| S_ATTR_SOME_INSTRUCTIONS)) |
| type = eSymbolTypeData; |
| else |
| type = eSymbolTypeCode; |
| } else if (symbol_section->IsDescendant( |
| data_section_sp.get()) || |
| symbol_section->IsDescendant( |
| data_dirty_section_sp.get()) || |
| symbol_section->IsDescendant( |
| data_const_section_sp.get())) { |
| if (symbol_sect_name && |
| ::strstr(symbol_sect_name, "__objc") == |
| symbol_sect_name) { |
| type = eSymbolTypeRuntime; |
| |
| if (symbol_name) { |
| llvm::StringRef symbol_name_ref(symbol_name); |
| if (symbol_name_ref.startswith("_OBJC_")) { |
| 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) { |
| const char *gsym_name = sym[sym_idx] |
| .GetMangled() |
| .GetName(lldb::eLanguageTypeUnknown, |
| Mangled::ePreferMangled) |
| .GetCString(); |
| if (gsym_name) |
| N_GSYM_name_to_sym_idx[gsym_name] = sym_idx; |
| } |
| |
| if (symbol_section) { |
| const addr_t section_file_addr = symbol_section->GetFileAddress(); |
| if (symbol_byte_size == 0 && function_starts_count > 0) { |
| addr_t symbol_lookup_file_addr = nlist.n_value; |
| // Do an exact address match for non-ARM addresses, else get the |
| // closest since the symbol might be a thumb symbol which has an |
| // address with bit zero set |
| FunctionStarts::Entry *func_start_entry = |
| function_starts.FindEntry(symbol_lookup_file_addr, !is_arm); |
| if (is_arm && func_start_entry) { |
| // Verify that the function start address is the symbol address |
| // (ARM) or the symbol address + 1 (thumb) |
| if (func_start_entry->addr != symbol_lookup_file_addr && |
| func_start_entry->addr != (symbol_lookup_file_addr + 1)) { |
| // Not the right entry, NULL it out... |
| func_start_entry = NULL; |
| } |
| } |
| if (func_start_entry) { |
| func_start_entry->data = true; |
| |
| addr_t symbol_file_addr = func_start_entry->addr; |
| if (is_arm) |
| symbol_file_addr &= THUMB_ADDRESS_BIT_MASK; |
| |
| const FunctionStarts::Entry *next_func_start_entry = |
| function_starts.FindNextEntry(func_start_entry); |
| const addr_t section_end_file_addr = |
| section_file_addr + symbol_section->GetByteSize(); |
| if (next_func_start_entry) { |
| addr_t next_symbol_file_addr = next_func_start_entry->addr; |
| // Be sure the clear the Thumb address bit when we calculate |
| // the size from the current and next address |
| if (is_arm) |
| next_symbol_file_addr &= THUMB_ADDRESS_BIT_MASK; |
| symbol_byte_size = std::min<lldb::addr_t>( |
| next_symbol_file_addr - symbol_file_addr, |
| section_end_file_addr - symbol_file_addr); |
| } else { |
| symbol_byte_size = section_end_file_addr - symbol_file_addr; |
| } |
| } |
| } |
| symbol_value -= section_file_addr; |
| } |
| |
| if (is_debug == 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( |
| lldb::eLanguageTypeUnknown, |
| Mangled::ePreferMangled) == |
| sym[pos->second].GetMangled().GetName( |
| lldb::eLanguageTypeUnknown, |
| Mangled::ePreferMangled)) { |
| m_nlist_idx_to_sym_idx[nlist_idx] = pos->second; |
| // We just need the flags from the linker symbol, so put |
| // these flags into the N_FUN flags to avoid duplicate |
| // symbols in the symbol table |
| sym[pos->second].SetExternal(sym[sym_idx].IsExternal()); |
| sym[pos->second].SetFlags(nlist.n_type << 16 | |
| nlist.n_desc); |
| if (resolver_addresses.find(nlist.n_value) != |
| resolver_addresses.end()) |
| sym[pos->second].SetType(eSymbolTypeResolver); |
| sym[sym_idx].Clear(); |
| found_it = true; |
| break; |
| } |
| } |
| if (found_it) |
| continue; |
| } else { |
| if (resolver_addresses.find(nlist.n_value) != |
| resolver_addresses.end()) |
| type = eSymbolTypeResolver; |
| } |
| } else if (type == eSymbolTypeData || |
| type == eSymbolTypeObjCClass || |
| type == eSymbolTypeObjCMetaClass || |
| type == eSymbolTypeObjCIVar) { |
| // See if we can find a N_STSYM entry for any data symbols. If we |
| // do find a match, and the name matches, then we can merge the |
| // two into just the Static symbol to avoid duplicate entries in |
| // the symbol table |
| 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( |
| lldb::eLanguageTypeUnknown, |
| Mangled::ePreferMangled) == |
| sym[pos->second].GetMangled().GetName( |
| lldb::eLanguageTypeUnknown, |
| 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 |
| const char *gsym_name = sym[sym_idx] |
| .GetMangled() |
| .GetName(lldb::eLanguageTypeUnknown, |
| Mangled::ePreferMangled) |
| .GetCString(); |
| if (gsym_name) { |
| ConstNameToSymbolIndexMap::const_iterator pos = |
| N_GSYM_name_to_sym_idx.find(gsym_name); |
| if (pos != N_GSYM_name_to_sym_idx.end()) { |
| const uint32_t GSYM_sym_idx = pos->second; |
| m_nlist_idx_to_sym_idx[nlist_idx] = GSYM_sym_idx; |
| // Copy the address, because often the N_GSYM address has |
| // an invalid address of zero when the global is a common |
| // symbol |
| sym[GSYM_sym_idx].GetAddressRef().SetSection( |
| symbol_section); |
| sym[GSYM_sym_idx].GetAddressRef().SetOffset(symbol_value); |
| // We just need the flags from the linker symbol, so put |
| // these flags into the N_GSYM flags to avoid duplicate |
| // symbols in the symbol table |
| sym[GSYM_sym_idx].SetFlags(nlist.n_type << 16 | |
| nlist.n_desc); |
| sym[sym_idx].Clear(); |
| continue; |
| } |
| } |
| } |
| } |
| } |
| |
| sym[sym_idx].SetID(nlist_idx); |
| sym[sym_idx].SetType(type); |
| if (set_value) { |
| sym[sym_idx].GetAddressRef().SetSection(symbol_section); |
| sym[sym_idx].GetAddressRef().SetOffset(symbol_value); |
| } |
| sym[sym_idx].SetFlags(nlist.n_type << 16 | nlist.n_desc); |
| |
| if (symbol_byte_size > 0) |
| sym[sym_idx].SetByteSize(symbol_byte_size); |
| |
| if (demangled_is_synthesized) |
| sym[sym_idx].SetDemangledNameIsSynthesized(true); |
| |
| ++sym_idx; |
| } else { |
| sym[sym_idx].Clear(); |
| } |
| } |
| |
| for (const auto &pos : reexport_shlib_needs_fixup) { |
| const auto undef_pos = undefined_name_to_desc.find(pos.second); |
| if (undef_pos != undefined_name_to_desc.end()) { |
| const uint8_t dylib_ordinal = |
| llvm::MachO::GET_LIBRARY_ORDINAL(undef_pos->second); |
| if (dylib_ordinal > 0 && dylib_ordinal < dylib_files.GetSize()) |
| sym[pos.first].SetReExportedSymbolSharedLibrary( |
| dylib_files.GetFileSpecAtIndex(dylib_ordinal - 1)); |
| } |
| } |
| } |
| |
| uint32_t synthetic_sym_id = symtab_load_command.nsyms; |
| |
| if (function_starts_count > 0) { |
| 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); |
| } |
| 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 &= THUMB_ADDRESS_BIT_MASK; |
| } |
| Address symbol_addr; |
| if (module_sp->ResolveFileAddress(symbol_file_addr, symbol_addr)) { |
| SectionSP symbol_section(symbol_addr.GetSection()); |
| uint32_t symbol_byte_size = 0; |
| if (symbol_section) { |
| const addr_t section_file_addr = |
| symbol_section->GetFileAddress(); |
| const FunctionStarts::Entry *next_func_start_entry = |
| function_starts.FindNextEntry(func_start_entry); |
| const addr_t section_end_file_addr = |
| section_file_addr + symbol_section->GetByteSize(); |
| if (next_func_start_entry) { |
| addr_t next_symbol_file_addr = next_func_start_entry->addr; |
| if (is_arm) |
| next_symbol_file_addr &= THUMB_ADDRESS_BIT_MASK; |
| symbol_byte_size = std::min<lldb::addr_t>( |
| next_symbol_file_addr - symbol_file_addr, |
| section_end_file_addr - symbol_file_addr); |
| } else { |
| symbol_byte_size = section_end_file_addr - symbol_file_addr; |
| } |
| sym[sym_idx].SetID(synthetic_sym_id++); |
| sym[sym_idx].GetMangled().SetDemangledName( |
| GetNextSyntheticSymbolName()); |
| sym[sym_idx].SetType(eSymbolTypeCode); |
| sym[sym_idx].SetIsSynthetic(true); |
| sym[sym_idx].GetAddressRef() = 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->GetAddressRef() = so_addr; |
| stub_symbol->SetByteSize(symbol_stub_byte_size); |
| } else { |
| // Make a synthetic symbol to describe the trampoline stub |
| Mangled stub_symbol_mangled_name(stub_symbol->GetMangled()); |
| if (sym_idx >= num_syms) { |
| sym = symtab->Resize(++num_syms); |
| stub_symbol = 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].GetAddressRef() = 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) { |
| // Only add indirect symbols from the Trie entries if we didn't have |
| // a N_INDR nlist entry for this already |
| if (indirect_symbol_names.find(e.entry.name) == |
| indirect_symbol_names.end()) { |
| // Make a synthetic symbol to describe re-exported symbol. |
| if (sym_idx >= num_syms) |
| sym = symtab->Resize(++num_syms); |
| sym[sym_idx].SetID(synthetic_sym_id++); |
| sym[sym_idx].GetMangled() = Mangled(e.entry.name); |
| sym[sym_idx].SetType(eSymbolTypeReExported); |
| sym[sym_idx].SetIsSynthetic(true); |
| sym[sym_idx].SetReExportedSymbolName(e.entry.import_name); |
| if (e.entry.other > 0 && e.entry.other <= dylib_files.GetSize()) { |
| sym[sym_idx].SetReExportedSymbolSharedLibrary( |
| dylib_files.GetFileSpecAtIndex(e.entry.other - 1)); |
| } |
| ++sym_idx; |
| } |
| } |
| } |
| } |
| |
| // 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) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| s->Printf("%p: ", static_cast<void *>(this)); |
| s->Indent(); |
| if (m_header.magic == MH_MAGIC_64 || m_header.magic == MH_CIGAM_64) |
| s->PutCString("ObjectFileMachO64"); |
| else |
| s->PutCString("ObjectFileMachO32"); |
| |
| ArchSpec header_arch; |
| GetArchitecture(header_arch); |
| |
| *s << ", file = '" << m_file |
| << "', triple = " << header_arch.GetTriple().getTriple() << "\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 = UUID::fromOptionalData(uuid_bytes, 16); |
| return true; |
| } |
| return false; |
| } |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| return false; |
| } |
| |
| static const char *GetOSName(uint32_t cmd) { |
| switch (cmd) { |
| case llvm::MachO::LC_VERSION_MIN_IPHONEOS: |
| return "ios"; |
| case llvm::MachO::LC_VERSION_MIN_MACOSX: |
| return "macosx"; |
| case llvm::MachO::LC_VERSION_MIN_TVOS: |
| return "tvos"; |
| case llvm::MachO::LC_VERSION_MIN_WATCHOS: |
| return "watchos"; |
| default: |
| llvm_unreachable("unexpected LC_VERSION load command"); |
| } |
| } |
| |
| 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(); |
| |
| // Set OS to an unspecified unknown or a "*" so it can match any OS |
| triple.setOS(llvm::Triple::UnknownOS); |
| triple.setOSName(llvm::StringRef()); |
| |
| if (header.filetype == MH_PRELOAD) { |
| if (header.cputype == CPU_TYPE_ARM) { |
| // If this is a 32-bit arm binary, and it's a standalone binary, force |
| // the Vendor to Apple so we don't accidentally pick up the generic |
| // armv7 ABI at runtime. Apple's armv7 ABI always uses r7 for the |
| // frame pointer register; most other armv7 ABIs use a combination of |
| // r7 and r11. |
| triple.setVendor(llvm::Triple::Apple); |
| } else { |
| // Set vendor to an unspecified unknown or a "*" so it can match any |
| // vendor This is required for correct behavior of EFI debugging on |
| // x86_64 |
| triple.setVendor(llvm::Triple::UnknownVendor); |
| triple.setVendorName(llvm::StringRef()); |
| } |
| 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; |
| |
| uint32_t major, minor, patch; |
| struct version_min_command version_min; |
| |
| llvm::SmallString<16> os_name; |
| llvm::raw_svector_ostream os(os_name); |
| |
| switch (load_cmd.cmd) { |
| case llvm::MachO::LC_VERSION_MIN_IPHONEOS: |
| case llvm::MachO::LC_VERSION_MIN_MACOSX: |
| case llvm::MachO::LC_VERSION_MIN_TVOS: |
| case llvm::MachO::LC_VERSION_MIN_WATCHOS: |
| if (load_cmd.cmdsize != sizeof(version_min)) |
| break; |
| data.ExtractBytes(cmd_offset, |
| sizeof(version_min), data.GetByteOrder(), |
| &version_min); |
| major = version_min.version >> 16; |
| minor = (version_min.version >> 8) & 0xffu; |
| patch = version_min.version & 0xffu; |
| os << GetOSName(load_cmd.cmd) << major << '.' << minor << '.' |
| << patch; |
| triple.setOSName(os.str()); |
| return true; |
| default: |
| break; |
| } |
| |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| |
| if (header.filetype != MH_KEXT_BUNDLE) { |
| // We didn't find a LC_VERSION_MIN load command and this isn't a KEXT |
| // so lets not say our Vendor is Apple, leave it as an unspecified |
| // unknown |
| triple.setVendor(llvm::Triple::UnknownVendor); |
| triple.setVendorName(llvm::StringRef()); |
| } |
| } |
| } |
| return arch.IsValid(); |
| } |
| |
| bool ObjectFileMachO::GetUUID(lldb_private::UUID *uuid) { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| return GetUUID(m_header, m_data, offset, *uuid); |
| } |
| return false; |
| } |
| |
| uint32_t ObjectFileMachO::GetDependentModules(FileSpecList &files) { |
| uint32_t count = 0; |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| struct load_command load_cmd; |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| std::vector<std::string> rpath_paths; |
| std::vector<std::string> rpath_relative_paths; |
| std::vector<std::string> at_exec_relative_paths; |
| 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_RPATH: |
| case LC_LOAD_DYLIB: |
| case LC_LOAD_WEAK_DYLIB: |
| case LC_REEXPORT_DYLIB: |
| case LC_LOAD_DYLINKER: |
| case LC_LOADFVMLIB: |
| case LC_LOAD_UPWARD_DYLIB: { |
| uint32_t name_offset = cmd_offset + m_data.GetU32(&offset); |
| const char *path = m_data.PeekCStr(name_offset); |
| if (path) { |
| if (load_cmd.cmd == LC_RPATH) |
| rpath_paths.push_back(path); |
| else { |
| if (path[0] == '@') { |
| if (strncmp(path, "@rpath", strlen("@rpath")) == 0) |
| rpath_relative_paths.push_back(path + strlen("@rpath")); |
| else if (strncmp(path, "@executable_path", |
| strlen("@executable_path")) == 0) |
| at_exec_relative_paths.push_back(path |
| + strlen("@executable_path")); |
| } else { |
| FileSpec file_spec(path, resolve_path); |
| if (files.AppendIfUnique(file_spec)) |
| count++; |
| } |
| } |
| } |
| } break; |
| |
| default: |
| break; |
| } |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| |
| FileSpec this_file_spec(m_file); |
| this_file_spec.ResolvePath(); |
| |
| if (!rpath_paths.empty()) { |
| // Fixup all LC_RPATH values to be absolute paths |
| std::string loader_path("@loader_path"); |
| std::string executable_path("@executable_path"); |
| for (auto &rpath : rpath_paths) { |
| if (rpath.find(loader_path) == 0) { |
| rpath.erase(0, loader_path.size()); |
| rpath.insert(0, this_file_spec.GetDirectory().GetCString()); |
| } else if (rpath.find(executable_path) == 0) { |
| rpath.erase(0, executable_path.size()); |
| rpath.insert(0, this_file_spec.GetDirectory().GetCString()); |
| } |
| } |
| |
| for (const auto &rpath_relative_path : rpath_relative_paths) { |
| for (const auto &rpath : rpath_paths) { |
| std::string path = rpath; |
| path += rpath_relative_path; |
| // It is OK to resolve this path because we must find a file on disk |
| // for us to accept it anyway if it is rpath relative. |
| FileSpec file_spec(path, true); |
| if (file_spec.Exists() && files.AppendIfUnique(file_spec)) { |
| count++; |
| break; |
| } |
| } |
| } |
| } |
| |
| // We may have @executable_paths but no RPATHS. Figure those out here. |
| // Only do this if this object file is the executable. We have no way to |
| // get back to the actual executable otherwise, so we won't get the right |
| // path. |
| if (!at_exec_relative_paths.empty() && CalculateType() == eTypeExecutable) { |
| FileSpec exec_dir = this_file_spec.CopyByRemovingLastPathComponent(); |
| for (const auto &at_exec_relative_path : at_exec_relative_paths) { |
| FileSpec file_spec = |
| exec_dir.CopyByAppendingPathComponent(at_exec_relative_path); |
| if (file_spec.Exists() && files.AppendIfUnique(file_spec)) |
| count++; |
| } |
| } |
| } |
| return count; |
| } |
| |
| lldb_private::Address ObjectFileMachO::GetEntryPointAddress() { |
| // If the object file is not an executable it can't hold the entry point. |
| // m_entry_point_address is initialized to an invalid address, so we can just |
| // return that. If m_entry_point_address is valid it means we've found it |
| // already, so return the cached value. |
| |
| if (!IsExecutable() || m_entry_point_address.IsValid()) |
| return m_entry_point_address; |
| |
| // Otherwise, look for the UnixThread or Thread command. The data for the |
| // Thread command is given in /usr/include/mach-o.h, but it is basically: |
| // |
| // uint32_t flavor - this is the flavor argument you would pass to |
| // thread_get_state |
| // uint32_t count - this is the count of longs in the thread state data |
| // struct XXX_thread_state state - this is the structure from |
| // <machine/thread_status.h> corresponding to the flavor. |
| // <repeat this trio> |
| // |
| // So we just keep reading the various register flavors till we find the GPR |
| // one, then read the PC out of there. |
| // FIXME: We will need to have a "RegisterContext data provider" class at some |
| // point that can get all the registers |
| // out of data in this form & attach them to a given thread. That should |
| // underlie the MacOS X User process plugin, and we'll also need it for the |
| // MacOS X Core File process plugin. When we have that we can also use it |
| // here. |
| // |
| // For now we hard-code the offsets and flavors we need: |
| // |
| // |
| |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| 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 || |
| flavor == 9) // ARM_THREAD_STATE/ARM_THREAD_STATE32 from |
| // mach/arm/thread_status.h |
| { |
| offset += 60; // This is the offset of pc in the GPR thread state |
| // data structure. |
| start_address = m_data.GetU32(&offset); |
| done = true; |
| } |
| break; |
| case llvm::MachO::CPU_TYPE_ARM64: |
| if (flavor == 6) // ARM_THREAD_STATE64 from mach/arm/thread_status.h |
| { |
| offset += 256; // This is the offset of pc in the GPR thread state |
| // data structure. |
| start_address = m_data.GetU64(&offset); |
| done = true; |
| } |
| break; |
| case llvm::MachO::CPU_TYPE_I386: |
| if (flavor == |
| 1) // x86_THREAD_STATE32 from mach/i386/thread_status.h |
| { |
| offset += 40; // This is the offset of eip in the GPR thread state |
| // data structure. |
| start_address = m_data.GetU32(&offset); |
| done = true; |
| } |
| break; |
| case llvm::MachO::CPU_TYPE_X86_64: |
| if (flavor == |
| 4) // x86_THREAD_STATE64 from mach/i386/thread_status.h |
| { |
| offset += 16 * 8; // This is the offset of rip in the GPR thread |
| // state data structure. |
| start_address = m_data.GetU64(&offset); |
| done = true; |
| } |
| break; |
| default: |
| return m_entry_point_address; |
| } |
| // Haven't found the GPR flavor yet, skip over the data for this |
| // flavor: |
| if (done) |
| break; |
| offset += count * 4; |
| } |
| } break; |
| case LC_MAIN: { |
| ConstString text_segment_name("__TEXT"); |
| uint64_t entryoffset = m_data.GetU64(&offset); |
| SectionSP text_segment_sp = |
| GetSectionList()->FindSectionByName(text_segment_name); |
| if (text_segment_sp) { |
| done = true; |
| start_address = text_segment_sp->GetFileAddress() + entryoffset; |
| } |
| } break; |
| |
| default: |
| break; |
| } |
| if (done) |
| break; |
| |
| // Go to the next load command: |
| offset = cmd_offset + load_cmd.cmdsize; |
| } |
| |
| if (start_address != LLDB_INVALID_ADDRESS) { |
| // 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) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| if (!m_thread_context_offsets_valid) { |
| m_thread_context_offsets_valid = true; |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| FileRangeArray::Entry file_range; |
| 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(); |
| } |
| |
| std::string ObjectFileMachO::GetIdentifierString() { |
| std::string result; |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| |
| // First, look over the load commands for an LC_NOTE load command with |
| // data_owner string "kern ver str" & use that if found. |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const uint32_t cmd_offset = offset; |
| load_command lc; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL) |
| break; |
| if (lc.cmd == LC_NOTE) |
| { |
| char data_owner[17]; |
| m_data.CopyData (offset, 16, data_owner); |
| data_owner[16] = '\0'; |
| offset += 16; |
| uint64_t fileoff = m_data.GetU64_unchecked (&offset); |
| uint64_t size = m_data.GetU64_unchecked (&offset); |
| |
| // "kern ver str" has a uint32_t version and then a nul terminated |
| // c-string. |
| if (strcmp ("kern ver str", data_owner) == 0) |
| { |
| offset = fileoff; |
| uint32_t version; |
| if (m_data.GetU32 (&offset, &version, 1) != nullptr) |
| { |
| if (version == 1) |
| { |
| uint32_t strsize = size - sizeof (uint32_t); |
| char *buf = (char*) malloc (strsize); |
| if (buf) |
| { |
| m_data.CopyData (offset, strsize, buf); |
| buf[strsize - 1] = '\0'; |
| result = buf; |
| if (buf) |
| free (buf); |
| return result; |
| } |
| } |
| } |
| } |
| } |
| offset = cmd_offset + lc.cmdsize; |
| } |
| |
| // Second, make a pass over the load commands looking for an obsolete |
| // LC_IDENT load command. |
| offset = MachHeaderSizeFromMagic(m_header.magic); |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const uint32_t cmd_offset = offset; |
| struct ident_command ident_command; |
| if (m_data.GetU32(&offset, &ident_command, 2) == NULL) |
| break; |
| if (ident_command.cmd == LC_IDENT && ident_command.cmdsize != 0) { |
| char *buf = (char *) malloc (ident_command.cmdsize); |
| if (buf != nullptr |
| && m_data.CopyData (offset, ident_command.cmdsize, buf) == ident_command.cmdsize) { |
| buf[ident_command.cmdsize - 1] = '\0'; |
| result = buf; |
| } |
| if (buf) |
| free (buf); |
| } |
| offset = cmd_offset + ident_command.cmdsize; |
| } |
| |
| } |
| return result; |
| } |
| |
| bool ObjectFileMachO::GetCorefileMainBinaryInfo (addr_t &address, UUID &uuid) { |
| address = LLDB_INVALID_ADDRESS; |
| uuid.Clear(); |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const uint32_t cmd_offset = offset; |
| load_command lc; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL) |
| break; |
| if (lc.cmd == LC_NOTE) |
| { |
| char data_owner[17]; |
| memset (data_owner, 0, sizeof (data_owner)); |
| m_data.CopyData (offset, 16, data_owner); |
| offset += 16; |
| uint64_t fileoff = m_data.GetU64_unchecked (&offset); |
| uint64_t size = m_data.GetU64_unchecked (&offset); |
| |
| // "main bin spec" (main binary specification) data payload is |
| // formatted: |
| // uint32_t version [currently 1] |
| // uint32_t type [0 == unspecified, 1 == kernel, 2 == user process] |
| // uint64_t address [ UINT64_MAX if address not specified ] |
| // uuid_t uuid [ all zero's if uuid not specified ] |
| // uint32_t log2_pagesize [ process page size in log base 2, e.g. 4k pages are 12. 0 for unspecified ] |
| |
| if (strcmp ("main bin spec", data_owner) == 0 && size >= 32) |
| { |
| offset = fileoff; |
| uint32_t version; |
| if (m_data.GetU32 (&offset, &version, 1) != nullptr && version == 1) |
| { |
| uint32_t type = 0; |
| uuid_t raw_uuid; |
| memset (raw_uuid, 0, sizeof (uuid_t)); |
| |
| if (m_data.GetU32(&offset, &type, 1) && |
| m_data.GetU64(&offset, &address, 1) && |
| m_data.CopyData(offset, sizeof(uuid_t), raw_uuid) != 0) { |
| uuid = UUID::fromOptionalData(raw_uuid, sizeof(uuid_t)); |
| return true; |
| } |
| } |
| } |
| } |
| offset = cmd_offset + lc.cmdsize; |
| } |
| } |
| return false; |
| } |
| |
| lldb::RegisterContextSP |
| ObjectFileMachO::GetThreadContextAtIndex(uint32_t idx, |
| lldb_private::Thread &thread) { |
| lldb::RegisterContextSP reg_ctx_sp; |
| |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| if (!m_thread_context_offsets_valid) |
| GetNumThreadContexts(); |
| |
| const FileRangeArray::Entry *thread_context_file_range = |
| m_thread_context_offsets.GetEntryAtIndex(idx); |
| if (thread_context_file_range) { |
| |
| DataExtractor data(m_data, thread_context_file_range->GetRangeBase(), |
| thread_context_file_range->GetByteSize()); |
| |
| switch (m_header.cputype) { |
| case llvm::MachO::CPU_TYPE_ARM64: |
| 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; |
| } |
| |
| llvm::VersionTuple ObjectFileMachO::GetVersion() { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(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) { |
| unsigned major = (version & 0xFFFF0000ull) >> 16; |
| unsigned minor = (version & 0x0000FF00ull) >> 8; |
| unsigned subminor = (version & 0x000000FFull); |
| return llvm::VersionTuple(major, minor, subminor); |
| } |
| } |
| return llvm::VersionTuple(); |
| } |
| |
| bool ObjectFileMachO::GetArchitecture(ArchSpec &arch) { |
| ModuleSP module_sp(GetModule()); |
| if (module_sp) { |
| std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex()); |
| return GetArchitecture(m_header, m_data, |
| MachHeaderSizeFromMagic(m_header.magic), arch); |
| } |
| return false; |
| } |
| |
| void ObjectFileMachO::GetProcessSharedCacheUUID(Process *process, addr_t &base_addr, UUID &uuid) { |
| uuid.Clear(); |
| base_addr = LLDB_INVALID_ADDRESS; |
| if (process && process->GetDynamicLoader()) { |
| DynamicLoader *dl = process->GetDynamicLoader(); |
| LazyBool using_shared_cache; |
| LazyBool private_shared_cache; |
| dl->GetSharedCacheInformation(base_addr, uuid, using_shared_cache, |
| private_shared_cache); |
| } |
| Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_SYMBOLS | LIBLLDB_LOG_PROCESS)); |
| if (log) |
| log->Printf("inferior process shared cache has a UUID of %s, base address 0x%" PRIx64 , uuid.GetAsString().c_str(), base_addr); |
| } |
| |
| // From dyld SPI header dyld_process_info.h |
| typedef void *dyld_process_info; |
| struct lldb_copy__dyld_process_cache_info { |
| uuid_t cacheUUID; // UUID of cache used by process |
| uint64_t cacheBaseAddress; // load address of dyld shared cache |
| bool noCache; // process is running without a dyld cache |
| bool privateCache; // process is using a private copy of its dyld cache |
| }; |
| |
| // #including mach/mach.h pulls in machine.h & CPU_TYPE_ARM etc conflicts with llvm |
| // enum definitions llvm::MachO::CPU_TYPE_ARM turning them into compile errors. |
| // So we need to use the actual underlying types of task_t and kern_return_t |
| // below. |
| extern "C" unsigned int /*task_t*/ mach_task_self(); |
| |
| void ObjectFileMachO::GetLLDBSharedCacheUUID(addr_t &base_addr, UUID &uuid) { |
| uuid.Clear(); |
| base_addr = LLDB_INVALID_ADDRESS; |
| |
| #if defined(__APPLE__) && \ |
| (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> |
| if (*version >= 15) |
| base_addr = *(uint64_t *) ((uint8_t *) dyld_all_image_infos_address |
| + 176); // sharedCacheBaseAddress <mach-o/dyld_images.h> |
| } else { |
| sharedCacheUUID_address = |
| (uuid_t *)((uint8_t *)dyld_all_image_infos_address + |
| 84); // sharedCacheUUID <mach-o/dyld_images.h> |
| if (*version >= 15) { |
| base_addr = 0; |
| base_addr = *(uint32_t *) ((uint8_t *) dyld_all_image_infos_address |
| + 100); // sharedCacheBaseAddress <mach-o/dyld_images.h> |
| } |
| } |
| uuid = UUID::fromOptionalData(sharedCacheUUID_address, sizeof(uuid_t)); |
| } |
| } |
| } else { |
| // Exists in macOS 10.12 and later, iOS 10.0 and later - dyld SPI |
| dyld_process_info (*dyld_process_info_create)(unsigned int /* task_t */ task, uint64_t timestamp, unsigned int /*kern_return_t*/ *kernelError); |
| void (*dyld_process_info_get_cache)(void *info, void *cacheInfo); |
| void (*dyld_process_info_release)(dyld_process_info info); |
| |
| dyld_process_info_create = (void *(*)(unsigned int /* task_t */, uint64_t, unsigned int /*kern_return_t*/ *)) |
| dlsym (RTLD_DEFAULT, "_dyld_process_info_create"); |
| dyld_process_info_get_cache = (void (*)(void *, void *)) |
| dlsym (RTLD_DEFAULT, "_dyld_process_info_get_cache"); |
| dyld_process_info_release = (void (*)(void *)) |
| dlsym (RTLD_DEFAULT, "_dyld_process_info_release"); |
| |
| if (dyld_process_info_create && dyld_process_info_get_cache) { |
| unsigned int /*kern_return_t */ kern_ret; |
| dyld_process_info process_info = dyld_process_info_create(::mach_task_self(), 0, &kern_ret); |
| if (process_info) { |
| struct lldb_copy__dyld_process_cache_info sc_info; |
| memset (&sc_info, 0, sizeof (struct lldb_copy__dyld_process_cache_info)); |
| dyld_process_info_get_cache (process_info, &sc_info); |
| if (sc_info.cacheBaseAddress != 0) { |
| base_addr = sc_info.cacheBaseAddress; |
| uuid = UUID::fromOptionalData(sc_info.cacheUUID, sizeof(uuid_t)); |
| } |
| dyld_process_info_release (process_info); |
| } |
| } |
| } |
| Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_SYMBOLS | LIBLLDB_LOG_PROCESS)); |
| if (log && uuid.IsValid()) |
| log->Printf("lldb's in-memory shared cache has a UUID of %s base address of 0x%" PRIx64, uuid.GetAsString().c_str(), base_addr); |
| #endif |
| } |
| |
| llvm::VersionTuple ObjectFileMachO::GetMinimumOSVersion() { |
| if (!m_min_os_version) { |
| lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic); |
| for (uint32_t i = 0; i < m_header.ncmds; ++i) { |
| const lldb::offset_t load_cmd_offset = offset; |
| |
| version_min_command lc; |
| if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL) |
| break; |
| if (lc.cmd == llvm::MachO::LC_VERSION_MIN_MACOSX || |
| lc.cmd == llvm::MachO::LC_VERSION_MIN_IPHONEOS || |
| lc.cmd == llvm::MachO::LC_VERSION_MIN_TVOS || |
| lc.cmd == llvm::MachO::LC_VERSION_MIN_WATCHOS) { |
| if (m_data.GetU32(&offset, &lc.version, |
| (sizeof(lc) / sizeof(uint32_t)) - 2)) { |
| const uint32_t xxxx = lc.version >> 16; |
| const uint32_t yy = (lc.version >> 8) & 0xffu; |
| const uint32_t zz = lc.version & 0xffu; |
| if (xxxx) { |
| m_min_os_version = llvm::VersionTuple(xxxx, yy, zz); |
| break; |
| } |
| } |
| } |
| offset = load_cmd_offset + lc.cmdsize; |
| } |
| |
| if (!m_min_os_version) { |
| // Set version to an empty value so we don't keep trying to |
| m_min_os_version = llvm::VersionTuple(); |
| } |
| } |
| |
| return *m_min_os_version; |
| } |
| |
| 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 == llvm::MachO::LC_VERSION_MIN_MACOSX || |
| lc.cmd == llvm::MachO::LC_VERSION_MIN_IPHONEOS || |
| lc.cmd == llvm::MachO::LC_VERSION_MIN_TVOS || |
| lc.cmd == llvm::MachO::LC_VERSION_MIN_WATCHOS) { |
| if (m_data.GetU32(&offset, &lc.version, |
| (sizeof(lc) / sizeof(uint32_t)) - 2)) { |
| const uint32_t xxxx = lc.sdk >> 16; |
| const uint32_t yy = (lc.sdk >> 8) & 0xffu; |
| const uint32_t zz = lc.sdk & 0xffu; |
| if (xxxx) { |
| m_sdk_versions.push_back(xxxx); |
| m_sdk_versions.push_back(yy); |
| m_sdk_versions.push_back(zz); |
| success = true; |
| } else { |
| GetModule()->ReportWarning( |
| "minimum OS version load command with invalid (0) version found."); |
| } |
| } |
| } |
| offset = load_cmd_offset + lc.cmdsize; |
| } |
| |
| if (success == false) { |
| // Push an invalid value so we don't try to find |
| // the version # again on the next call to this |
| // method. |
| m_sdk_versions.push_back(UINT32_MAX); |
| } |
| } |
| |
| // Legitimate version numbers will have 3 entries pushed |
| // on to m_sdk_versions. If we only have one value, it's |
| // the sentinel value indicating that this object file |
| // does not have a valid minimum os version #. |
| if (m_sdk_versions.size() > 1) { |
| 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); |
| } |
| |
| bool ObjectFileMachO::GetIsDynamicLinkEditor() { |
| return m_header.filetype == llvm::MachO::MH_DYLINKER; |
| } |
| |
| bool ObjectFileMachO::AllowAssemblyEmulationUnwindPlans() { |
| return m_allow_assembly_emulation_unwind_plans; |
| } |
| |
| //------------------------------------------------------------------ |
| // PluginInterface protocol |
| //------------------------------------------------------------------ |
| lldb_private::ConstString ObjectFileMachO::GetPluginName() { |
| return GetPluginNameStatic(); |
| } |
| |
| uint32_t ObjectFileMachO::GetPluginVersion() { return 1; } |
| |
| Section *ObjectFileMachO::GetMachHeaderSection() { |
| // Find the first address of the mach header which is the first non-zero file |
| // sized section whose file offset is zero. This is the base file address of |
| // the mach-o file which can be subtracted from the vmaddr of the other |
| // segments found in memory and added to the load address |
| ModuleSP module_sp = GetModule(); |
| if (module_sp) { |
| 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(); |
| |
| for (size_t sect_idx = 0; sect_idx < num_sections && |
| mach_base_file_addr == LLDB_INVALID_ADDRESS; |
| ++sect_idx) { |
| 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()) { |
| return section; |
| } |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| lldb::addr_t ObjectFileMachO::CalculateSectionLoadAddressForMemoryImage( |
| lldb::addr_t mach_header_load_address, const Section *mach_header_section, |
| const Section *section) { |
| ModuleSP module_sp = GetModule(); |
| if (module_sp && mach_header_section && section && |
| mach_header_load_address != LLDB_INVALID_ADDRESS) { |
| lldb::addr_t mach_header_file_addr = mach_header_section->GetFileAddress(); |
| if (mach_header_file_addr != LLDB_INVALID_ADDRESS) { |
| if (section && section->GetFileSize() > 0 && |
| section->IsThreadSpecific() == false && |
| module_sp.get() == section->GetModule().get()) { |
| // Ignore __LINKEDIT and __DWARF segments |
| if (section->GetName() == GetSegmentNameLINKEDIT()) { |
| // Only map __LINKEDIT if we have an in memory image and this isn't a |
| // kernel binary like a kext or mach_kernel. |
| const bool is_memory_image = (bool)m_process_wp.lock(); |
| const Strata strata = GetStrata(); |
| if (is_memory_image == false || strata == eStrataKernel) |
| return LLDB_INVALID_ADDRESS; |
| } |
| return section->GetFileAddress() - mach_header_file_addr + |
| mach_header_load_address; |
| } |
| } |
| } |
| return LLDB_INVALID_ADDRESS; |
| } |
| |
| bool ObjectFileMachO::SetLoadAddress(Target &target, lldb::addr_t value, |
| bool value_is_offset) { |
| ModuleSP module_sp = GetModule(); |
| if (module_sp) { |
| size_t num_loaded_sections = 0; |
| SectionList *section_list = GetSectionList(); |
| if (section_list) { |
| const size_t num_sections = section_list->GetSize(); |
| |
| if (value_is_offset) { |
| // "value" is an offset to apply to each top level segment |
| for (size_t sect_idx = 0; sect_idx < num_sections; ++sect_idx) { |
| // Iterate through the object file sections to find all of the |
| // sections that size on disk (to avoid __PAGEZERO) and load them |
| SectionSP section_sp(section_list->GetSectionAtIndex(sect_idx)); |
| if (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() == GetSegmentNameLINKEDIT()) { |
| // Only map __LINKEDIT if we have an in memory image and this |
| // isn't a kernel binary like a kext or mach_kernel. |
| const bool is_memory_image = (bool)m_process_wp.lock(); |
| const Strata strata = GetStrata(); |
| if (is_memory_image == false || strata == eStrataKernel) |
| 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 |
| |
| Section *mach_header_section = GetMachHeaderSection(); |
| if (mach_header_section) { |
| for (size_t sect_idx = 0; sect_idx < num_sections; ++sect_idx) { |
| SectionSP section_sp(section_list->GetSectionAtIndex(sect_idx)); |
| |
| lldb::addr_t section_load_addr = |
| CalculateSectionLoadAddressForMemoryImage( |
| value, mach_header_section, section_sp.get()); |
| if (section_load_addr != LLDB_INVALID_ADDRESS) { |
| if (target.GetSectionLoadList().SetSectionLoadAddress( |
| section_sp, section_load_addr)) |
| ++num_loaded_sections; |
| } |
| } |
| } |
| } |
| } |
| return num_loaded_sections > 0; |
| } |
| return false; |
| } |
| |
| bool ObjectFileMachO::SaveCore(const lldb::ProcessSP &process_sp, |
| const FileSpec &outfile, Status &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 || |
| target_triple.getOS() == llvm::Triple::WatchOS || |
| target_triple.getOS() == llvm::Triple::TvOS)) { |
| bool make_core = false; |
| switch (target_arch.GetMachine()) { |
| case llvm::Triple::aarch64: |
| case llvm::Triple::arm: |
| case llvm::Triple::thumb: |
| case llvm::Triple::x86: |
| case llvm::Triple::x86_64: |
| make_core = true; |
| break; |
| default: |
| error.SetErrorStringWithFormat("unsupported core architecture: %s", |
| target_triple.str().c_str()); |
| break; |
| } |
| |
| if (make_core) { |
| std::vector<segment_command_64> segment_load_commands; |
| // uint32_t range_info_idx = 0; |
| MemoryRegionInfo range_info; |
| Status range_error = process_sp->GetMemoryRegionInfo(0, range_info); |
| const uint32_t addr_byte_size = target_arch.GetAddressByteSize(); |
| const ByteOrder byte_order = target_arch.GetByteOrder(); |
| 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) { |
| uint32_t cmd_type = LC_SEGMENT_64; |
| uint32_t segment_size = sizeof(segment_command_64); |
| if (addr_byte_size == 4) { |
| cmd_type = LC_SEGMENT; |
| segment_size = sizeof(segment_command); |
| } |
| segment_command_64 segment = { |
| cmd_type, // uint32_t cmd; |
| segment_size, // uint32_t cmdsize; |
| {0}, // char segname[16]; |
| addr, // uint64_t vmaddr; // uint32_t for 32-bit Mach-O |
| size, // uint64_t vmsize; // uint32_t for 32-bit Mach-O |
| 0, // uint64_t fileoff; // uint32_t for 32-bit Mach-O |
| size, // uint64_t filesize; // uint32_t for 32-bit Mach-O |
| 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; |
| } |
| |
| StreamString buffer(Stream::eBinary, addr_byte_size, byte_order); |
| |
| mach_header_64 mach_header; |
| if (addr_byte_size == 8) { |
| mach_header.magic = MH_MAGIC_64; |
| } else { |
| mach_header.magic = MH_MAGIC; |
| } |
| mach_header.cputype = target_arch.GetMachOCPUType(); |
| mach_header.cpusubtype = target_arch.GetMachOCPUSubType(); |
| mach_header.filetype = MH_CORE; |
| mach_header.ncmds = segment_load_commands.size(); |
| mach_header.flags = 0; |
| mach_header.reserved = 0; |
| ThreadList &thread_list = process_sp->GetThreadList(); |
| const uint32_t num_threads = thread_list.GetSize(); |
| |
| // Make an array of LC_THREAD data items. Each one contains the |
| // contents of the LC_THREAD load command. The data doesn't contain |
| // the load command + load command size, we will add the load command |
| // and load command size as we emit the data. |
| std::vector<StreamString> LC_THREAD_datas(num_threads); |
| for (auto &LC_THREAD_data : LC_THREAD_datas) { |
| LC_THREAD_data.GetFlags().Set(Stream::eBinary); |
| LC_THREAD_data.SetAddressByteSize(addr_byte_size); |
| LC_THREAD_data.SetByteOrder(byte_order); |
| } |
| for (uint32_t thread_idx = 0; thread_idx < num_threads; |
| ++thread_idx) { |
| ThreadSP thread_sp(thread_list.GetThreadAtIndex(thread_idx)); |
| if (thread_sp) { |
| switch (mach_header.cputype) { |
| case llvm::MachO::CPU_TYPE_ARM64: |
| RegisterContextDarwin_arm64_Mach::Create_LC_THREAD( |
| thread_sp.get(), LC_THREAD_datas[thread_idx]); |
| break; |
| |
| case llvm::MachO::CPU_TYPE_ARM: |
| RegisterContextDarwin_arm_Mach::Create_LC_THREAD( |
| thread_sp.get(), LC_THREAD_datas[thread_idx]); |
| break; |
| |
| case llvm::MachO::CPU_TYPE_I386: |
| RegisterContextDarwin_i386_Mach::Create_LC_THREAD( |
| thread_sp.get(), LC_THREAD_datas[thread_idx]); |
| break; |
| |
| case llvm::MachO::CPU_TYPE_X86_64: |
| RegisterContextDarwin_x86_64_Mach::Create_LC_THREAD( |
| thread_sp.get(), LC_THREAD_datas[thread_idx]); |
| break; |
| } |
| } |
| } |
| |
| // The size of the load command is the size of the segments... |
| if (addr_byte_size == 8) { |
| mach_header.sizeofcmds = segment_load_commands.size() * |
| sizeof(struct segment_command_64); |
| } else { |
| mach_header.sizeofcmds = |
| segment_load_commands.size() * sizeof(struct segment_command); |
| } |
| |
| // and the size of all LC_THREAD load command |
| for (const auto &LC_THREAD_data : LC_THREAD_datas) { |
| ++mach_header.ncmds; |
| mach_header.sizeofcmds += 8 + LC_THREAD_data.GetSize(); |
| } |
| |
| 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); |
| if (addr_byte_size == 8) { |
| buffer.PutHex32(mach_header.reserved); |
| } |
| |
| // Skip the mach header and all load commands and align to the next |
| // 0x1000 byte boundary |
| addr_t file_offset = buffer.GetSize() + mach_header.sizeofcmds; |
| 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.GetString().data(), |
| 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)); |
| if (addr_byte_size == 8) { |
| buffer.PutHex64(segment.vmaddr); |
| buffer.PutHex64(segment.vmsize); |
| buffer.PutHex64(segment.fileoff); |
| buffer.PutHex64(segment.filesize); |
| } else { |
| buffer.PutHex32(static_cast<uint32_t>(segment.vmaddr)); |
| buffer.PutHex32(static_cast<uint32_t>(segment.vmsize)); |
| buffer.PutHex32(static_cast<uint32_t>(segment.fileoff)); |
| buffer.PutHex32(static_cast<uint32_t>(segment.filesize)); |
| } |
| buffer.PutHex32(segment.maxprot); |
| buffer.PutHex32(segment.initprot); |
| buffer.PutHex32(segment.nsects); |
| buffer.PutHex32(segment.flags); |
| } |
| |
| 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 (core_file.SeekFromStart(segment.fileoff) == -1) { |
| error.SetErrorStringWithFormat( |
| "unable to seek to offset 0x%" PRIx64 " in '%s'", |
| segment.fileoff, core_file_path.c_str()); |
| break; |
| } |
| |
| printf("Saving %" PRId64 |
| " bytes of data for memory region at 0x%" PRIx64 "\n", |
| segment.vmsize, segment.vmaddr); |
| addr_t bytes_left = segment.vmsize; |
| addr_t addr = segment.vmaddr; |
| Status memory_read_error; |
| while (bytes_left > 0 && error.Success()) { |
| const size_t bytes_to_read = |
| bytes_left > sizeof(bytes) ? sizeof(bytes) : bytes_left; |
| 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; |
| } |