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authorDimitry Andric <dim@FreeBSD.org>2016-01-06 20:12:03 +0000
committerDimitry Andric <dim@FreeBSD.org>2016-01-06 20:12:03 +0000
commit9e6d35490a6542f9c97607f93c2ef8ca8e03cbcc (patch)
treedd2a1ddf0476664c2b823409c36cbccd52662ca7 /source/Plugins/ObjectFile/Mach-O
parent3bd2e91faeb9eeec1aae82c64a3253afff551cfd (diff)
vendor/lldb/lldb-trunk-r256945
Notes
Diffstat (limited to 'source/Plugins/ObjectFile/Mach-O')
-rw-r--r--source/Plugins/ObjectFile/Mach-O/CMakeLists.txt3
-rw-r--r--source/Plugins/ObjectFile/Mach-O/Makefile14
-rw-r--r--source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp6096
-rw-r--r--source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.h252
4 files changed, 6365 insertions, 0 deletions
diff --git a/source/Plugins/ObjectFile/Mach-O/CMakeLists.txt b/source/Plugins/ObjectFile/Mach-O/CMakeLists.txt
new file mode 100644
index 0000000000000..45d45860b9e50
--- /dev/null
+++ b/source/Plugins/ObjectFile/Mach-O/CMakeLists.txt
@@ -0,0 +1,3 @@
+add_lldb_library(lldbPluginObjectFileMachO
+ ObjectFileMachO.cpp
+ )
diff --git a/source/Plugins/ObjectFile/Mach-O/Makefile b/source/Plugins/ObjectFile/Mach-O/Makefile
new file mode 100644
index 0000000000000..2fab0238e411d
--- /dev/null
+++ b/source/Plugins/ObjectFile/Mach-O/Makefile
@@ -0,0 +1,14 @@
+##===- source/Plugins/ObjectFile/Mach-O/Makefile -----------*- Makefile -*-===##
+#
+# The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LLDB_LEVEL := ../../../..
+LIBRARYNAME := lldbPluginObjectFileMachO
+BUILD_ARCHIVE = 1
+
+include $(LLDB_LEVEL)/Makefile
diff --git a/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp b/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
new file mode 100644
index 0000000000000..9c1e177825084
--- /dev/null
+++ b/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
@@ -0,0 +1,6096 @@
+//===-- 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 "lldb/Core/ArchSpec.h"
+#include "lldb/Core/DataBuffer.h"
+#include "lldb/Core/Debugger.h"
+#include "lldb/Core/Error.h"
+#include "lldb/Core/FileSpecList.h"
+#include "lldb/Core/Log.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/ModuleSpec.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/RangeMap.h"
+#include "lldb/Core/Section.h"
+#include "lldb/Core/StreamFile.h"
+#include "lldb/Core/StreamString.h"
+#include "lldb/Core/Timer.h"
+#include "lldb/Core/UUID.h"
+#include "lldb/Host/Host.h"
+#include "lldb/Host/FileSpec.h"
+#include "lldb/Symbol/DWARFCallFrameInfo.h"
+#include "lldb/Symbol/ObjectFile.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 "Plugins/Process/Utility/RegisterContextDarwin_arm.h"
+#include "Plugins/Process/Utility/RegisterContextDarwin_arm64.h"
+#include "Plugins/Process/Utility/RegisterContextDarwin_i386.h"
+#include "Plugins/Process/Utility/RegisterContextDarwin_x86_64.h"
+
+#include "lldb/Utility/SafeMachO.h"
+
+#include "ObjectFileMachO.h"
+
+#if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__))
+// GetLLDBSharedCacheUUID() needs to call dlsym()
+#include <dlfcn.h>
+#endif
+
+#ifndef __APPLE__
+#include "Utility/UuidCompatibility.h"
+#endif
+
+#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 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<33; ++i)
+ gpr.x[i] = data.GetU64(&offset);
+ gpr.cpsr = data.GetU32(&offset);
+ SetError (GPRRegSet, Read, 0);
+ }
+ offset = next_thread_state;
+ break;
+ case FPURegSet:
+ {
+ uint8_t *fpu_reg_buf = (uint8_t*) &fpu.v[0];
+ const int fpu_reg_buf_size = sizeof (fpu);
+ if (fpu_reg_buf_size == count
+ && data.ExtractBytes (offset, fpu_reg_buf_size, eByteOrderLittle, fpu_reg_buf) == fpu_reg_buf_size)
+ {
+ SetError (FPURegSet, Read, 0);
+ }
+ else
+ {
+ done = true;
+ }
+ }
+ offset = next_thread_state;
+ break;
+ case EXCRegSet:
+ if (count == 4)
+ {
+ exc.far = data.GetU64(&offset);
+ exc.esr = data.GetU32(&offset);
+ exc.exception = data.GetU32(&offset);
+ SetError (EXCRegSet, Read, 0);
+ }
+ offset = next_thread_state;
+ break;
+ default:
+ done = true;
+ break;
+ }
+ }
+ }
+
+ 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 = file->MemoryMapFileContentsIfLocal(file_offset, length);
+ data_offset = 0;
+ }
+
+ if (ObjectFileMachO::MagicBytesMatch(data_sp, data_offset, length))
+ {
+ // Update the data to contain the entire file if it doesn't already
+ if (data_sp->GetByteSize() < length)
+ {
+ data_sp = file->MemoryMapFileContentsIfLocal(file_offset, length);
+ data_offset = 0;
+ }
+ std::unique_ptr<ObjectFile> objfile_ap(new ObjectFileMachO (module_sp, data_sp, data_offset, file, file_offset, length));
+ if (objfile_ap.get() && objfile_ap->ParseHeader())
+ return objfile_ap.release();
+ }
+ return NULL;
+}
+
+ObjectFile *
+ObjectFileMachO::CreateMemoryInstance (const lldb::ModuleSP &module_sp,
+ DataBufferSP& data_sp,
+ const ProcessSP &process_sp,
+ lldb::addr_t header_addr)
+{
+ if (ObjectFileMachO::MagicBytesMatch(data_sp, 0, data_sp->GetByteSize()))
+ {
+ std::unique_ptr<ObjectFile> objfile_ap(new ObjectFileMachO (module_sp, data_sp, process_sp, header_addr));
+ if (objfile_ap.get() && objfile_ap->ParseHeader())
+ return objfile_ap.release();
+ }
+ return NULL;
+}
+
+size_t
+ObjectFileMachO::GetModuleSpecifications (const lldb_private::FileSpec& file,
+ lldb::DataBufferSP& data_sp,
+ lldb::offset_t data_offset,
+ lldb::offset_t file_offset,
+ lldb::offset_t length,
+ lldb_private::ModuleSpecList &specs)
+{
+ const size_t initial_count = specs.GetSize();
+
+ if (ObjectFileMachO::MagicBytesMatch(data_sp, 0, data_sp->GetByteSize()))
+ {
+ DataExtractor data;
+ data.SetData(data_sp);
+ llvm::MachO::mach_header header;
+ if (ParseHeader (data, &data_offset, header))
+ {
+ size_t header_and_load_cmds = header.sizeofcmds + MachHeaderSizeFromMagic(header.magic);
+ if (header_and_load_cmds >= data_sp->GetByteSize())
+ {
+ data_sp = file.ReadFileContents(file_offset, header_and_load_cmds);
+ data.SetData(data_sp);
+ data_offset = MachHeaderSizeFromMagic(header.magic);
+ }
+ if (data_sp)
+ {
+ ModuleSpec spec;
+ spec.GetFileSpec() = file;
+ spec.SetObjectOffset(file_offset);
+ 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)
+{
+ ::memset (&m_header, 0, sizeof(m_header));
+ ::memset (&m_dysymtab, 0, sizeof(m_dysymtab));
+}
+
+ObjectFileMachO::ObjectFileMachO (const lldb::ModuleSP &module_sp,
+ lldb::DataBufferSP& header_data_sp,
+ const lldb::ProcessSP &process_sp,
+ lldb::addr_t header_addr) :
+ ObjectFile(module_sp, process_sp, header_addr, header_data_sp),
+ m_mach_segments(),
+ m_mach_sections(),
+ m_entry_point_address(),
+ m_thread_context_offsets(),
+ m_thread_context_offsets_valid(false)
+{
+ ::memset (&m_header, 0, sizeof(m_header));
+ ::memset (&m_dysymtab, 0, sizeof(m_dysymtab));
+}
+
+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)
+ {
+ lldb_private::Mutex::Locker locker(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 = m_file.ReadFileContents(m_file_offset, header_and_lc_size);
+ if (data_sp->GetByteSize() != header_and_lc_size)
+ return false;
+ }
+ if (data_sp)
+ m_data.SetData (data_sp);
+ }
+ }
+ return true;
+ }
+ }
+ else
+ {
+ memset(&m_header, 0, sizeof(struct mach_header));
+ }
+ }
+ return false;
+}
+
+ByteOrder
+ObjectFileMachO::GetByteOrder () const
+{
+ return m_data.GetByteOrder ();
+}
+
+bool
+ObjectFileMachO::IsExecutable() const
+{
+ return m_header.filetype == MH_EXECUTE;
+}
+
+uint32_t
+ObjectFileMachO::GetAddressByteSize () const
+{
+ return m_data.GetAddressByteSize ();
+}
+
+AddressClass
+ObjectFileMachO::GetAddressClass (lldb::addr_t file_addr)
+{
+ Symtab *symtab = GetSymtab();
+ if (symtab)
+ {
+ Symbol *symbol = symtab->FindSymbolContainingFileAddress(file_addr);
+ if (symbol)
+ {
+ if (symbol->ValueIsAddress())
+ {
+ SectionSP section_sp (symbol->GetAddressRef().GetSection());
+ if (section_sp)
+ {
+ const lldb::SectionType section_type = section_sp->GetType();
+ switch (section_type)
+ {
+ case eSectionTypeInvalid:
+ return eAddressClassUnknown;
+
+ case eSectionTypeCode:
+ if (m_header.cputype == llvm::MachO::CPU_TYPE_ARM)
+ {
+ // For ARM we have a bit in the n_desc field of the symbol
+ // that tells us ARM/Thumb which is bit 0x0008.
+ if (symbol->GetFlags() & MACHO_NLIST_ARM_SYMBOL_IS_THUMB)
+ return eAddressClassCodeAlternateISA;
+ }
+ return eAddressClassCode;
+
+ case eSectionTypeContainer:
+ return eAddressClassUnknown;
+
+ case eSectionTypeData:
+ case eSectionTypeDataCString:
+ case eSectionTypeDataCStringPointers:
+ case eSectionTypeDataSymbolAddress:
+ case eSectionTypeData4:
+ case eSectionTypeData8:
+ case eSectionTypeData16:
+ case eSectionTypeDataPointers:
+ case eSectionTypeZeroFill:
+ case eSectionTypeDataObjCMessageRefs:
+ case eSectionTypeDataObjCCFStrings:
+ case eSectionTypeGoSymtab:
+ return eAddressClassData;
+
+ case eSectionTypeDebug:
+ case eSectionTypeDWARFDebugAbbrev:
+ case eSectionTypeDWARFDebugAddr:
+ case eSectionTypeDWARFDebugAranges:
+ case eSectionTypeDWARFDebugFrame:
+ case eSectionTypeDWARFDebugInfo:
+ case eSectionTypeDWARFDebugLine:
+ case eSectionTypeDWARFDebugLoc:
+ case eSectionTypeDWARFDebugMacInfo:
+ case eSectionTypeDWARFDebugMacro:
+ case eSectionTypeDWARFDebugPubNames:
+ case eSectionTypeDWARFDebugPubTypes:
+ case eSectionTypeDWARFDebugRanges:
+ case eSectionTypeDWARFDebugStr:
+ case eSectionTypeDWARFDebugStrOffsets:
+ case eSectionTypeDWARFAppleNames:
+ case eSectionTypeDWARFAppleTypes:
+ case eSectionTypeDWARFAppleNamespaces:
+ case eSectionTypeDWARFAppleObjC:
+ return eAddressClassDebug;
+
+ case eSectionTypeEHFrame:
+ case eSectionTypeARMexidx:
+ case eSectionTypeARMextab:
+ case eSectionTypeCompactUnwind:
+ return eAddressClassRuntime;
+
+ case eSectionTypeELFSymbolTable:
+ case eSectionTypeELFDynamicSymbols:
+ case eSectionTypeELFRelocationEntries:
+ case eSectionTypeELFDynamicLinkInfo:
+ case eSectionTypeOther:
+ return eAddressClassUnknown;
+ }
+ }
+ }
+
+ const SymbolType symbol_type = symbol->GetType();
+ switch (symbol_type)
+ {
+ case eSymbolTypeAny: return eAddressClassUnknown;
+ case eSymbolTypeAbsolute: return eAddressClassUnknown;
+
+ case eSymbolTypeCode:
+ case eSymbolTypeTrampoline:
+ case eSymbolTypeResolver:
+ if (m_header.cputype == llvm::MachO::CPU_TYPE_ARM)
+ {
+ // For ARM we have a bit in the n_desc field of the symbol
+ // that tells us ARM/Thumb which is bit 0x0008.
+ if (symbol->GetFlags() & MACHO_NLIST_ARM_SYMBOL_IS_THUMB)
+ return eAddressClassCodeAlternateISA;
+ }
+ return eAddressClassCode;
+
+ case eSymbolTypeData: return eAddressClassData;
+ case eSymbolTypeRuntime: return eAddressClassRuntime;
+ case eSymbolTypeException: return eAddressClassRuntime;
+ case eSymbolTypeSourceFile: return eAddressClassDebug;
+ case eSymbolTypeHeaderFile: return eAddressClassDebug;
+ case eSymbolTypeObjectFile: return eAddressClassDebug;
+ case eSymbolTypeCommonBlock: return eAddressClassDebug;
+ case eSymbolTypeBlock: return eAddressClassDebug;
+ case eSymbolTypeLocal: return eAddressClassData;
+ case eSymbolTypeParam: return eAddressClassData;
+ case eSymbolTypeVariable: return eAddressClassData;
+ case eSymbolTypeVariableType: return eAddressClassDebug;
+ case eSymbolTypeLineEntry: return eAddressClassDebug;
+ case eSymbolTypeLineHeader: return eAddressClassDebug;
+ case eSymbolTypeScopeBegin: return eAddressClassDebug;
+ case eSymbolTypeScopeEnd: return eAddressClassDebug;
+ case eSymbolTypeAdditional: return eAddressClassUnknown;
+ case eSymbolTypeCompiler: return eAddressClassDebug;
+ case eSymbolTypeInstrumentation:return eAddressClassDebug;
+ case eSymbolTypeUndefined: return eAddressClassUnknown;
+ case eSymbolTypeObjCClass: return eAddressClassRuntime;
+ case eSymbolTypeObjCMetaClass: return eAddressClassRuntime;
+ case eSymbolTypeObjCIVar: return eAddressClassRuntime;
+ case eSymbolTypeReExported: return eAddressClassRuntime;
+ }
+ }
+ }
+ return eAddressClassUnknown;
+}
+
+Symtab *
+ObjectFileMachO::GetSymtab()
+{
+ ModuleSP module_sp(GetModule());
+ if (module_sp)
+ {
+ lldb_private::Mutex::Locker locker(module_sp->GetMutex());
+ if (m_symtab_ap.get() == NULL)
+ {
+ m_symtab_ap.reset(new Symtab(this));
+ Mutex::Locker symtab_locker (m_symtab_ap->GetMutex());
+ ParseSymtab ();
+ m_symtab_ap->Finalize ();
+ }
+ }
+ return m_symtab_ap.get();
+}
+
+bool
+ObjectFileMachO::IsStripped ()
+{
+ if (m_dysymtab.cmd == 0)
+ {
+ ModuleSP module_sp(GetModule());
+ if (module_sp)
+ {
+ lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
+ for (uint32_t i=0; i<m_header.ncmds; ++i)
+ {
+ const lldb::offset_t load_cmd_offset = offset;
+
+ load_command lc;
+ if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL)
+ break;
+ if (lc.cmd == LC_DYSYMTAB)
+ {
+ m_dysymtab.cmd = lc.cmd;
+ m_dysymtab.cmdsize = lc.cmdsize;
+ if (m_data.GetU32 (&offset, &m_dysymtab.ilocalsym, (sizeof(m_dysymtab) / sizeof(uint32_t)) - 2) == NULL)
+ {
+ // Clear m_dysymtab if we were unable to read all items from the load command
+ ::memset (&m_dysymtab, 0, sizeof(m_dysymtab));
+ }
+ }
+ offset = load_cmd_offset + lc.cmdsize;
+ }
+ }
+ }
+ if (m_dysymtab.cmd)
+ return m_dysymtab.nlocalsym <= 1;
+ return false;
+}
+
+void
+ObjectFileMachO::CreateSections (SectionList &unified_section_list)
+{
+ if (!m_sections_ap.get())
+ {
+ m_sections_ap.reset(new SectionList());
+
+ const bool is_dsym = (m_header.filetype == MH_DSYM);
+ lldb::user_id_t segID = 0;
+ lldb::user_id_t sectID = 0;
+ lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
+ uint32_t i;
+ const bool is_core = GetType() == eTypeCoreFile;
+ //bool dump_sections = false;
+ ModuleSP module_sp (GetModule());
+ // First look up any LC_ENCRYPTION_INFO load commands
+ typedef RangeArray<uint32_t, uint32_t, 8> EncryptedFileRanges;
+ EncryptedFileRanges encrypted_file_ranges;
+ encryption_info_command encryption_cmd;
+ for (i=0; i<m_header.ncmds; ++i)
+ {
+ const lldb::offset_t load_cmd_offset = offset;
+ if (m_data.GetU32(&offset, &encryption_cmd, 2) == NULL)
+ break;
+
+ // 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);
+ encrypted_file_ranges.Append(entry);
+ }
+ }
+ }
+ offset = load_cmd_offset + encryption_cmd.cmdsize;
+ }
+
+ bool section_file_addresses_changed = false;
+
+ offset = MachHeaderSizeFromMagic(m_header.magic);
+
+ struct segment_command_64 load_cmd;
+ for (i=0; i<m_header.ncmds; ++i)
+ {
+ const lldb::offset_t load_cmd_offset = offset;
+ if (m_data.GetU32(&offset, &load_cmd, 2) == NULL)
+ break;
+
+ if (load_cmd.cmd == LC_SEGMENT || load_cmd.cmd == LC_SEGMENT_64)
+ {
+ if (m_data.GetU8(&offset, (uint8_t*)load_cmd.segname, 16))
+ {
+ bool add_section = true;
+ bool add_to_unified = true;
+ ConstString const_segname (load_cmd.segname, std::min<size_t>(strlen(load_cmd.segname), sizeof(load_cmd.segname)));
+
+ SectionSP unified_section_sp(unified_section_list.FindSectionByName(const_segname));
+ if (is_dsym && unified_section_sp)
+ {
+ if (const_segname == GetSegmentNameLINKEDIT())
+ {
+ // We need to keep the __LINKEDIT segment private to this object file only
+ add_to_unified = false;
+ }
+ else
+ {
+ // This is the dSYM file and this section has already been created by
+ // the object file, no need to create it.
+ add_section = false;
+ }
+ }
+ load_cmd.vmaddr = m_data.GetAddress(&offset);
+ load_cmd.vmsize = m_data.GetAddress(&offset);
+ load_cmd.fileoff = m_data.GetAddress(&offset);
+ load_cmd.filesize = m_data.GetAddress(&offset);
+ if (m_length != 0 && load_cmd.filesize != 0)
+ {
+ if (load_cmd.fileoff > m_length)
+ {
+ // We have a load command that says it extends past the end of the file. This is likely
+ // a corrupt file. We don't have any way to return an error condition here (this method
+ // was likely invoked from something like ObjectFile::GetSectionList()) -- all we can do
+ // is null out the SectionList vector and if a process has been set up, dump a message
+ // to stdout. The most common case here is core file debugging with a truncated file.
+ const char *lc_segment_name = load_cmd.cmd == LC_SEGMENT_64 ? "LC_SEGMENT_64" : "LC_SEGMENT";
+ module_sp->ReportWarning("load command %u %s has a fileoff (0x%" PRIx64 ") that extends beyond the end of the file (0x%" PRIx64 "), ignoring this section",
+ i,
+ lc_segment_name,
+ load_cmd.fileoff,
+ m_length);
+
+ load_cmd.fileoff = 0;
+ load_cmd.filesize = 0;
+ }
+
+ if (load_cmd.fileoff + load_cmd.filesize > m_length)
+ {
+ // We have a load command that says it extends past the end of the file. This is likely
+ // a corrupt file. We don't have any way to return an error condition here (this method
+ // was likely invoked from something like ObjectFile::GetSectionList()) -- all we can do
+ // is null out the SectionList vector and if a process has been set up, dump a message
+ // to stdout. The most common case here is core file debugging with a truncated file.
+ const char *lc_segment_name = load_cmd.cmd == LC_SEGMENT_64 ? "LC_SEGMENT_64" : "LC_SEGMENT";
+ GetModule()->ReportWarning("load command %u %s has a fileoff + filesize (0x%" PRIx64 ") that extends beyond the end of the file (0x%" PRIx64 "), the segment will be truncated to match",
+ i,
+ lc_segment_name,
+ load_cmd.fileoff + load_cmd.filesize,
+ m_length);
+
+ // Tuncase the length
+ load_cmd.filesize = m_length - load_cmd.fileoff;
+ }
+ }
+ if (m_data.GetU32(&offset, &load_cmd.maxprot, 4))
+ {
+
+ const bool segment_is_encrypted = (load_cmd.flags & SG_PROTECTED_VERSION_1) != 0;
+
+ // Keep a list of mach segments around in case we need to
+ // get at data that isn't stored in the abstracted Sections.
+ m_mach_segments.push_back (load_cmd);
+
+ // Use a segment ID of the segment index shifted left by 8 so they
+ // never conflict with any of the sections.
+ SectionSP segment_sp;
+ if (add_section && (const_segname || is_core))
+ {
+ segment_sp.reset(new Section (module_sp, // Module to which this section belongs
+ this, // Object file to which this sections belongs
+ ++segID << 8, // Section ID is the 1 based segment index shifted right by 8 bits as not to collide with any of the 256 section IDs that are possible
+ const_segname, // Name of this section
+ eSectionTypeContainer, // This section is a container of other sections.
+ load_cmd.vmaddr, // File VM address == addresses as they are found in the object file
+ load_cmd.vmsize, // VM size in bytes of this section
+ load_cmd.fileoff, // Offset to the data for this section in the file
+ load_cmd.filesize, // Size in bytes of this section as found in the file
+ 0, // Segments have no alignment information
+ load_cmd.flags)); // Flags for this section
+
+ segment_sp->SetIsEncrypted (segment_is_encrypted);
+ m_sections_ap->AddSection(segment_sp);
+ if (add_to_unified)
+ unified_section_list.AddSection(segment_sp);
+ }
+ else if (unified_section_sp)
+ {
+ if (is_dsym && unified_section_sp->GetFileAddress() != load_cmd.vmaddr)
+ {
+ // Check to see if the module was read from memory?
+ if (module_sp->GetObjectFile()->GetHeaderAddress().IsValid())
+ {
+ // We have a module that is in memory and needs to have its
+ // file address adjusted. We need to do this because when we
+ // load a file from memory, its addresses will be slid already,
+ // yet the addresses in the new symbol file will still be unslid.
+ // Since everything is stored as section offset, this shouldn't
+ // cause any problems.
+
+ // Make sure we've parsed the symbol table from the
+ // ObjectFile before we go around changing its Sections.
+ module_sp->GetObjectFile()->GetSymtab();
+ // eh_frame would present the same problems but we parse that on
+ // a per-function basis as-needed so it's more difficult to
+ // remove its use of the Sections. Realistically, the environments
+ // where this code path will be taken will not have eh_frame sections.
+
+ unified_section_sp->SetFileAddress(load_cmd.vmaddr);
+
+ // Notify the module that the section addresses have been changed once
+ // we're done so any file-address caches can be updated.
+ section_file_addresses_changed = true;
+ }
+ }
+ m_sections_ap->AddSection(unified_section_sp);
+ }
+
+ struct section_64 sect64;
+ ::memset (&sect64, 0, sizeof(sect64));
+ // Push a section into our mach sections for the section at
+ // index zero (NO_SECT) if we don't have any mach sections yet...
+ if (m_mach_sections.empty())
+ m_mach_sections.push_back(sect64);
+ uint32_t segment_sect_idx;
+ const lldb::user_id_t first_segment_sectID = sectID + 1;
+
+
+ const uint32_t num_u32s = load_cmd.cmd == LC_SEGMENT ? 7 : 8;
+ for (segment_sect_idx=0; segment_sect_idx<load_cmd.nsects; ++segment_sect_idx)
+ {
+ if (m_data.GetU8(&offset, (uint8_t*)sect64.sectname, sizeof(sect64.sectname)) == NULL)
+ break;
+ if (m_data.GetU8(&offset, (uint8_t*)sect64.segname, sizeof(sect64.segname)) == NULL)
+ break;
+ sect64.addr = m_data.GetAddress(&offset);
+ sect64.size = m_data.GetAddress(&offset);
+
+ if (m_data.GetU32(&offset, &sect64.offset, num_u32s) == NULL)
+ break;
+
+ // Keep a list of mach sections around in case we need to
+ // get at data that isn't stored in the abstracted Sections.
+ m_mach_sections.push_back (sect64);
+
+ if (add_section)
+ {
+ ConstString section_name (sect64.sectname, std::min<size_t>(strlen(sect64.sectname), sizeof(sect64.sectname)));
+ if (!const_segname)
+ {
+ // We have a segment with no name so we need to conjure up
+ // segments that correspond to the section's segname if there
+ // isn't already such a section. If there is such a section,
+ // we resize the section so that it spans all sections.
+ // We also mark these sections as fake so address matches don't
+ // hit if they land in the gaps between the child sections.
+ const_segname.SetTrimmedCStringWithLength(sect64.segname, sizeof(sect64.segname));
+ segment_sp = unified_section_list.FindSectionByName (const_segname);
+ if (segment_sp.get())
+ {
+ Section *segment = segment_sp.get();
+ // Grow the section size as needed.
+ const lldb::addr_t sect64_min_addr = sect64.addr;
+ const lldb::addr_t sect64_max_addr = sect64_min_addr + sect64.size;
+ const lldb::addr_t curr_seg_byte_size = segment->GetByteSize();
+ const lldb::addr_t curr_seg_min_addr = segment->GetFileAddress();
+ const lldb::addr_t curr_seg_max_addr = curr_seg_min_addr + curr_seg_byte_size;
+ if (sect64_min_addr >= curr_seg_min_addr)
+ {
+ const lldb::addr_t new_seg_byte_size = sect64_max_addr - curr_seg_min_addr;
+ // Only grow the section size if needed
+ if (new_seg_byte_size > curr_seg_byte_size)
+ segment->SetByteSize (new_seg_byte_size);
+ }
+ else
+ {
+ // We need to change the base address of the segment and
+ // adjust the child section offsets for all existing children.
+ const lldb::addr_t slide_amount = sect64_min_addr - curr_seg_min_addr;
+ segment->Slide(slide_amount, false);
+ segment->GetChildren().Slide(-slide_amount, false);
+ segment->SetByteSize (curr_seg_max_addr - sect64_min_addr);
+ }
+
+ // Grow the section size as needed.
+ if (sect64.offset)
+ {
+ const lldb::addr_t segment_min_file_offset = segment->GetFileOffset();
+ const lldb::addr_t segment_max_file_offset = segment_min_file_offset + segment->GetFileSize();
+
+ const lldb::addr_t section_min_file_offset = sect64.offset;
+ const lldb::addr_t section_max_file_offset = section_min_file_offset + sect64.size;
+ const lldb::addr_t new_file_offset = std::min (section_min_file_offset, segment_min_file_offset);
+ const lldb::addr_t new_file_size = std::max (section_max_file_offset, segment_max_file_offset) - new_file_offset;
+ segment->SetFileOffset (new_file_offset);
+ segment->SetFileSize (new_file_size);
+ }
+ }
+ else
+ {
+ // Create a fake section for the section's named segment
+ segment_sp.reset(new Section (segment_sp, // Parent section
+ module_sp, // Module to which this section belongs
+ this, // Object file to which this section belongs
+ ++segID << 8, // Section ID is the 1 based segment index shifted right by 8 bits as not to collide with any of the 256 section IDs that are possible
+ const_segname, // Name of this section
+ eSectionTypeContainer, // This section is a container of other sections.
+ sect64.addr, // File VM address == addresses as they are found in the object file
+ sect64.size, // VM size in bytes of this section
+ sect64.offset, // Offset to the data for this section in the file
+ sect64.offset ? sect64.size : 0, // Size in bytes of this section as found in the file
+ sect64.align,
+ load_cmd.flags)); // Flags for this section
+ segment_sp->SetIsFake(true);
+
+ m_sections_ap->AddSection(segment_sp);
+ if (add_to_unified)
+ unified_section_list.AddSection(segment_sp);
+ segment_sp->SetIsEncrypted (segment_is_encrypted);
+ }
+ }
+ assert (segment_sp.get());
+
+ lldb::SectionType sect_type = eSectionTypeOther;
+
+ if (sect64.flags & (S_ATTR_PURE_INSTRUCTIONS | S_ATTR_SOME_INSTRUCTIONS))
+ sect_type = eSectionTypeCode;
+ else
+ {
+ uint32_t mach_sect_type = sect64.flags & SECTION_TYPE;
+ static ConstString g_sect_name_objc_data ("__objc_data");
+ static ConstString g_sect_name_objc_msgrefs ("__objc_msgrefs");
+ static ConstString g_sect_name_objc_selrefs ("__objc_selrefs");
+ static ConstString g_sect_name_objc_classrefs ("__objc_classrefs");
+ static ConstString g_sect_name_objc_superrefs ("__objc_superrefs");
+ static ConstString g_sect_name_objc_const ("__objc_const");
+ static ConstString g_sect_name_objc_classlist ("__objc_classlist");
+ static ConstString g_sect_name_cfstring ("__cfstring");
+
+ static ConstString g_sect_name_dwarf_debug_abbrev ("__debug_abbrev");
+ static ConstString g_sect_name_dwarf_debug_aranges ("__debug_aranges");
+ static ConstString g_sect_name_dwarf_debug_frame ("__debug_frame");
+ static ConstString g_sect_name_dwarf_debug_info ("__debug_info");
+ static ConstString g_sect_name_dwarf_debug_line ("__debug_line");
+ static ConstString g_sect_name_dwarf_debug_loc ("__debug_loc");
+ static ConstString g_sect_name_dwarf_debug_macinfo ("__debug_macinfo");
+ static ConstString g_sect_name_dwarf_debug_pubnames ("__debug_pubnames");
+ static ConstString g_sect_name_dwarf_debug_pubtypes ("__debug_pubtypes");
+ static ConstString g_sect_name_dwarf_debug_ranges ("__debug_ranges");
+ static ConstString g_sect_name_dwarf_debug_str ("__debug_str");
+ static ConstString g_sect_name_dwarf_apple_names ("__apple_names");
+ static ConstString g_sect_name_dwarf_apple_types ("__apple_types");
+ static ConstString g_sect_name_dwarf_apple_namespaces ("__apple_namespac");
+ static ConstString g_sect_name_dwarf_apple_objc ("__apple_objc");
+ static ConstString g_sect_name_eh_frame ("__eh_frame");
+ static ConstString g_sect_name_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)
+ sect_type = eSectionTypeDWARFDebugAbbrev;
+ else if (section_name == g_sect_name_dwarf_debug_aranges)
+ sect_type = eSectionTypeDWARFDebugAranges;
+ else if (section_name == g_sect_name_dwarf_debug_frame)
+ sect_type = eSectionTypeDWARFDebugFrame;
+ else if (section_name == g_sect_name_dwarf_debug_info)
+ sect_type = eSectionTypeDWARFDebugInfo;
+ else if (section_name == g_sect_name_dwarf_debug_line)
+ sect_type = eSectionTypeDWARFDebugLine;
+ else if (section_name == g_sect_name_dwarf_debug_loc)
+ sect_type = eSectionTypeDWARFDebugLoc;
+ else if (section_name == g_sect_name_dwarf_debug_macinfo)
+ sect_type = eSectionTypeDWARFDebugMacInfo;
+ else if (section_name == g_sect_name_dwarf_debug_pubnames)
+ sect_type = eSectionTypeDWARFDebugPubNames;
+ else if (section_name == g_sect_name_dwarf_debug_pubtypes)
+ sect_type = eSectionTypeDWARFDebugPubTypes;
+ else if (section_name == g_sect_name_dwarf_debug_ranges)
+ sect_type = eSectionTypeDWARFDebugRanges;
+ else if (section_name == g_sect_name_dwarf_debug_str)
+ sect_type = eSectionTypeDWARFDebugStr;
+ else if (section_name == g_sect_name_dwarf_apple_names)
+ sect_type = eSectionTypeDWARFAppleNames;
+ else if (section_name == g_sect_name_dwarf_apple_types)
+ sect_type = eSectionTypeDWARFAppleTypes;
+ else if (section_name == g_sect_name_dwarf_apple_namespaces)
+ sect_type = eSectionTypeDWARFAppleNamespaces;
+ else if (section_name == g_sect_name_dwarf_apple_objc)
+ sect_type = eSectionTypeDWARFAppleObjC;
+ else if (section_name == g_sect_name_objc_selrefs)
+ sect_type = eSectionTypeDataCStringPointers;
+ else if (section_name == g_sect_name_objc_msgrefs)
+ sect_type = eSectionTypeDataObjCMessageRefs;
+ else if (section_name == g_sect_name_eh_frame)
+ sect_type = eSectionTypeEHFrame;
+ else if (section_name == g_sect_name_compact_unwind)
+ sect_type = eSectionTypeCompactUnwind;
+ else if (section_name == g_sect_name_cfstring)
+ sect_type = eSectionTypeDataObjCCFStrings;
+ else if (section_name == g_sect_name_go_symtab)
+ sect_type = eSectionTypeGoSymtab;
+ else if (section_name == g_sect_name_objc_data ||
+ section_name == g_sect_name_objc_classrefs ||
+ section_name == g_sect_name_objc_superrefs ||
+ section_name == g_sect_name_objc_const ||
+ section_name == g_sect_name_objc_classlist)
+ {
+ sect_type = eSectionTypeDataPointers;
+ }
+
+ if (sect_type == eSectionTypeOther)
+ {
+ switch (mach_sect_type)
+ {
+ // TODO: categorize sections by other flags for regular sections
+ case S_REGULAR:
+ if (section_name == g_sect_name_text)
+ sect_type = eSectionTypeCode;
+ else if (section_name == g_sect_name_data)
+ sect_type = eSectionTypeData;
+ else
+ sect_type = eSectionTypeOther;
+ break;
+ case S_ZEROFILL: sect_type = eSectionTypeZeroFill; break;
+ case S_CSTRING_LITERALS: sect_type = eSectionTypeDataCString; break; // section with only literal C strings
+ case S_4BYTE_LITERALS: sect_type = eSectionTypeData4; break; // section with only 4 byte literals
+ case S_8BYTE_LITERALS: sect_type = eSectionTypeData8; break; // section with only 8 byte literals
+ case S_LITERAL_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only pointers to literals
+ case S_NON_LAZY_SYMBOL_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only non-lazy symbol pointers
+ case S_LAZY_SYMBOL_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only lazy symbol pointers
+ case S_SYMBOL_STUBS: sect_type = eSectionTypeCode; break; // section with only symbol stubs, byte size of stub in the reserved2 field
+ case S_MOD_INIT_FUNC_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only function pointers for initialization
+ case S_MOD_TERM_FUNC_POINTERS: sect_type = eSectionTypeDataPointers; break; // section with only function pointers for termination
+ case S_COALESCED: sect_type = eSectionTypeOther; break;
+ case S_GB_ZEROFILL: sect_type = eSectionTypeZeroFill; break;
+ case S_INTERPOSING: sect_type = eSectionTypeCode; break; // section with only pairs of function pointers for interposing
+ case S_16BYTE_LITERALS: sect_type = eSectionTypeData16; break; // section with only 16 byte literals
+ case S_DTRACE_DOF: sect_type = eSectionTypeDebug; break;
+ case S_LAZY_DYLIB_SYMBOL_POINTERS: sect_type = eSectionTypeDataPointers; break;
+ default: break;
+ }
+ }
+ }
+
+ SectionSP section_sp(new Section (segment_sp,
+ module_sp,
+ this,
+ ++sectID,
+ section_name,
+ sect_type,
+ sect64.addr - segment_sp->GetFileAddress(),
+ sect64.size,
+ sect64.offset,
+ sect64.offset == 0 ? 0 : sect64.size,
+ sect64.align,
+ sect64.flags));
+ // Set the section to be encrypted to match the segment
+
+ bool section_is_encrypted = false;
+ if (!segment_is_encrypted && load_cmd.filesize != 0)
+ section_is_encrypted = encrypted_file_ranges.FindEntryThatContains(sect64.offset) != NULL;
+
+ section_sp->SetIsEncrypted (segment_is_encrypted || section_is_encrypted);
+ segment_sp->GetChildren().AddSection(section_sp);
+
+ if (segment_sp->IsFake())
+ {
+ segment_sp.reset();
+ const_segname.Clear();
+ }
+ }
+ }
+ if (segment_sp && is_dsym)
+ {
+ if (first_segment_sectID <= sectID)
+ {
+ lldb::user_id_t sect_uid;
+ for (sect_uid = first_segment_sectID; sect_uid <= sectID; ++sect_uid)
+ {
+ SectionSP curr_section_sp(segment_sp->GetChildren().FindSectionByID (sect_uid));
+ SectionSP next_section_sp;
+ if (sect_uid + 1 <= sectID)
+ next_section_sp = segment_sp->GetChildren().FindSectionByID (sect_uid+1);
+
+ if (curr_section_sp.get())
+ {
+ if (curr_section_sp->GetByteSize() == 0)
+ {
+ if (next_section_sp.get() != NULL)
+ curr_section_sp->SetByteSize ( next_section_sp->GetFileAddress() - curr_section_sp->GetFileAddress() );
+ else
+ curr_section_sp->SetByteSize ( load_cmd.vmsize );
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ else if (load_cmd.cmd == LC_DYSYMTAB)
+ {
+ m_dysymtab.cmd = load_cmd.cmd;
+ m_dysymtab.cmdsize = load_cmd.cmdsize;
+ m_data.GetU32 (&offset, &m_dysymtab.ilocalsym, (sizeof(m_dysymtab) / sizeof(uint32_t)) - 2);
+ }
+
+ offset = load_cmd_offset + load_cmd.cmdsize;
+ }
+
+
+ if (section_file_addresses_changed && module_sp.get())
+ {
+ 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 dsc_data_sp = dyld_shared_cache.MemoryMapFileContentsIfLocal(0, sizeof(struct lldb_copy_dyld_cache_header_v1));
+ if (dsc_data_sp)
+ {
+ DataExtractor dsc_header_data (dsc_data_sp, byte_order, addr_byte_size);
+
+ char version_str[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);
+ uint8_t uuid_bytes[sizeof (uuid_t)];
+ memcpy (uuid_bytes, dsc_header_data.GetData (&offset, sizeof (uuid_t)), sizeof (uuid_t));
+ dsc_uuid.SetBytes (uuid_bytes);
+ }
+ }
+ return dsc_uuid;
+}
+
+size_t
+ObjectFileMachO::ParseSymtab ()
+{
+ Timer scoped_timer(__PRETTY_FUNCTION__,
+ "ObjectFileMachO::ParseSymtab () module = %s",
+ m_file.GetFilename().AsCString(""));
+ ModuleSP module_sp (GetModule());
+ if (!module_sp)
+ return 0;
+
+ struct symtab_command symtab_load_command = { 0, 0, 0, 0, 0, 0 };
+ struct linkedit_data_command function_starts_load_command = { 0, 0, 0, 0 };
+ struct dyld_info_command dyld_info = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+ typedef AddressDataArray<lldb::addr_t, bool, 100> FunctionStarts;
+ FunctionStarts function_starts;
+ lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
+ uint32_t i;
+ FileSpecList dylib_files;
+ Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SYMBOLS));
+ 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(GetLLDBSharedCacheUUID());
+ UUID process_shared_cache(GetProcessSharedCacheUUID(process));
+ bool use_lldb_cache = true;
+ if (lldb_shared_cache.IsValid() && process_shared_cache.IsValid() && lldb_shared_cache != process_shared_cache)
+ {
+ use_lldb_cache = false;
+ ModuleSP module_sp (GetModule());
+ if (module_sp)
+ module_sp->ReportWarning ("shared cache in process does not match lldb's own shared cache, startup will be slow.");
+
+ }
+
+ PlatformSP platform_sp (target.GetPlatform());
+ if (platform_sp && platform_sp->IsHost() && use_lldb_cache)
+ {
+ data_was_read = true;
+ nlist_data.SetData((void *)symoff_addr, nlist_data_byte_size, eByteOrderLittle);
+ strtab_data.SetData((void *)strtab_addr, strtab_data_byte_size, eByteOrderLittle);
+ if (function_starts_load_command.cmd)
+ {
+ const addr_t func_start_addr = linkedit_load_addr + function_starts_load_command.dataoff - linkedit_file_offset;
+ function_starts_data.SetData ((void *)func_start_addr, function_starts_load_command.datasize, eByteOrderLittle);
+ }
+ }
+ }
+#endif
+
+ if (!data_was_read)
+ {
+ if (memory_module_load_level == eMemoryModuleLoadLevelComplete)
+ {
+ DataBufferSP nlist_data_sp (ReadMemory (process_sp, symoff_addr, nlist_data_byte_size));
+ if (nlist_data_sp)
+ nlist_data.SetData (nlist_data_sp, 0, nlist_data_sp->GetByteSize());
+ // Load strings individually from memory when loading from memory since shared cache
+ // string tables contain strings for all symbols from all shared cached libraries
+ //DataBufferSP strtab_data_sp (ReadMemory (process_sp, strtab_addr, strtab_data_byte_size));
+ //if (strtab_data_sp)
+ // strtab_data.SetData (strtab_data_sp, 0, strtab_data_sp->GetByteSize());
+ if (m_dysymtab.nindirectsyms != 0)
+ {
+ const addr_t indirect_syms_addr = linkedit_load_addr + m_dysymtab.indirectsymoff - linkedit_file_offset;
+ DataBufferSP indirect_syms_data_sp (ReadMemory (process_sp, indirect_syms_addr, m_dysymtab.nindirectsyms * 4));
+ if (indirect_syms_data_sp)
+ indirect_symbol_index_data.SetData (indirect_syms_data_sp, 0, indirect_syms_data_sp->GetByteSize());
+ }
+ }
+
+ if (memory_module_load_level >= eMemoryModuleLoadLevelPartial)
+ {
+ if (function_starts_load_command.cmd)
+ {
+ const addr_t func_start_addr = linkedit_load_addr + function_starts_load_command.dataoff - linkedit_file_offset;
+ DataBufferSP func_start_data_sp (ReadMemory (process_sp, func_start_addr, function_starts_load_command.datasize));
+ if (func_start_data_sp)
+ function_starts_data.SetData (func_start_data_sp, 0, func_start_data_sp->GetByteSize());
+ }
+ }
+ }
+ }
+ }
+ else
+ {
+ nlist_data.SetData (m_data,
+ symtab_load_command.symoff,
+ nlist_data_byte_size);
+ strtab_data.SetData (m_data,
+ symtab_load_command.stroff,
+ strtab_data_byte_size);
+
+ if (dyld_info.export_size > 0)
+ {
+ dyld_trie_data.SetData (m_data,
+ dyld_info.export_off,
+ dyld_info.export_size);
+ }
+
+ if (m_dysymtab.nindirectsyms != 0)
+ {
+ indirect_symbol_index_data.SetData (m_data,
+ m_dysymtab.indirectsymoff,
+ m_dysymtab.nindirectsyms * 4);
+ }
+ if (function_starts_load_command.cmd)
+ {
+ function_starts_data.SetData (m_data,
+ function_starts_load_command.dataoff,
+ function_starts_load_command.datasize);
+ }
+ }
+
+ if (nlist_data.GetByteSize() == 0 && memory_module_load_level == eMemoryModuleLoadLevelComplete)
+ {
+ if (log)
+ module_sp->LogMessage(log, "failed to read nlist data");
+ return 0;
+ }
+
+ const bool have_strtab_data = strtab_data.GetByteSize() > 0;
+ if (!have_strtab_data)
+ {
+ if (process)
+ {
+ if (strtab_addr == LLDB_INVALID_ADDRESS)
+ {
+ if (log)
+ module_sp->LogMessage(log, "failed to locate the strtab in memory");
+ return 0;
+ }
+ }
+ else
+ {
+ if (log)
+ module_sp->LogMessage(log, "failed to read strtab data");
+ return 0;
+ }
+ }
+
+ const ConstString &g_segment_name_TEXT = GetSegmentNameTEXT();
+ const ConstString &g_segment_name_DATA = GetSegmentNameDATA();
+ const ConstString &g_segment_name_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, eRegisterKindEHFrame, true);
+ DWARFCallFrameInfo::FunctionAddressAndSizeVector functions;
+ eh_frame.GetFunctionAddressAndSizeVector (functions);
+ addr_t text_base_addr = text_section_sp->GetFileAddress();
+ size_t count = functions.GetSize();
+ for (size_t i = 0; i < count; ++i)
+ {
+ const DWARFCallFrameInfo::FunctionAddressAndSizeVector::Entry *func = functions.GetEntryAtIndex (i);
+ if (func)
+ {
+ FunctionStarts::Entry function_start_entry;
+ function_start_entry.addr = func->base - text_base_addr;
+ function_starts.Append(function_start_entry);
+ }
+ }
+ }
+ }
+
+ const size_t function_starts_count = function_starts.GetSize();
+
+ const user_id_t TEXT_eh_frame_sectID =
+ eh_frame_section_sp.get() ? eh_frame_section_sp->GetID()
+ : 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;
+
+ if (process)
+ {
+ process_shared_cache_uuid = GetProcessSharedCacheUUID(process);
+ }
+
+ // 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 = dsc_filespec.MemoryMapFileContentsIfLocal(0, sizeof(struct lldb_copy_dyld_cache_header_v1));
+ 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 = dsc_filespec.MemoryMapFileContentsIfLocal(mappingOffset, sizeof (struct lldb_copy_dyld_cache_mapping_info));
+ DataExtractor dsc_mapping_info_data(dsc_mapping_info_data_sp, byte_order, addr_byte_size);
+ offset = 0;
+
+ // The File addresses (from the in-memory Mach-O load commands) for the shared libraries
+ // in the shared library cache need to be adjusted by an offset to match up with the
+ // dylibOffset identifying field in the dyld_cache_local_symbol_entry's. This offset is
+ // recorded in mapping_offset_value.
+ const uint64_t mapping_offset_value = dsc_mapping_info_data.GetU64(&offset);
+
+ offset = offsetof (struct lldb_copy_dyld_cache_header_v1, localSymbolsOffset);
+ uint64_t localSymbolsOffset = dsc_header_data.GetU64(&offset);
+ uint64_t localSymbolsSize = dsc_header_data.GetU64(&offset);
+
+ if (localSymbolsOffset && localSymbolsSize)
+ {
+ // Map the local symbols
+ if (DataBufferSP dsc_local_symbols_data_sp = dsc_filespec.MemoryMapFileContentsIfLocal(localSymbolsOffset, localSymbolsSize))
+ {
+ 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().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(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(Mangled::ePreferMangled) == sym[pos->second].GetMangled().GetName(Mangled::ePreferMangled))
+ {
+ m_nlist_idx_to_sym_idx[nlist_idx] = pos->second;
+ // We just need the flags from the linker symbol, so put these flags
+ // into the N_FUN flags to avoid duplicate symbols in the symbol table
+ sym[pos->second].SetExternal(sym[sym_idx].IsExternal());
+ sym[pos->second].SetFlags (nlist.n_type << 16 | nlist.n_desc);
+ if (resolver_addresses.find(nlist.n_value) != resolver_addresses.end())
+ sym[pos->second].SetType (eSymbolTypeResolver);
+ sym[sym_idx].Clear();
+ found_it = true;
+ break;
+ }
+ }
+ if (found_it)
+ continue;
+ }
+ else
+ {
+ if (resolver_addresses.find(nlist.n_value) != resolver_addresses.end())
+ type = eSymbolTypeResolver;
+ }
+ }
+ else if (type == eSymbolTypeData ||
+ type == eSymbolTypeObjCClass ||
+ type == eSymbolTypeObjCMetaClass ||
+ type == eSymbolTypeObjCIVar )
+ {
+ // See if we can find a N_STSYM entry for any data symbols.
+ // If we do find a match, and the name matches, then we
+ // can merge the two into just the Static symbol to avoid
+ // duplicate entries in the symbol table
+ std::pair<ValueToSymbolIndexMap::const_iterator, ValueToSymbolIndexMap::const_iterator> range;
+ range = N_STSYM_addr_to_sym_idx.equal_range(nlist.n_value);
+ if (range.first != range.second)
+ {
+ bool found_it = false;
+ for (ValueToSymbolIndexMap::const_iterator pos = range.first; pos != range.second; ++pos)
+ {
+ if (sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled) == sym[pos->second].GetMangled().GetName(Mangled::ePreferMangled))
+ {
+ m_nlist_idx_to_sym_idx[nlist_idx] = pos->second;
+ // We just need the flags from the linker symbol, so put these flags
+ // into the N_STSYM flags to avoid duplicate symbols in the symbol table
+ sym[pos->second].SetExternal(sym[sym_idx].IsExternal());
+ sym[pos->second].SetFlags (nlist.n_type << 16 | nlist.n_desc);
+ sym[sym_idx].Clear();
+ found_it = true;
+ break;
+ }
+ }
+ if (found_it)
+ continue;
+ }
+ else
+ {
+ const char *gsym_name = sym[sym_idx].GetMangled().GetName(Mangled::ePreferMangled).GetCString();
+ if (gsym_name)
+ {
+ // Combine N_GSYM stab entries with the non stab symbol
+ ConstNameToSymbolIndexMap::const_iterator pos = N_GSYM_name_to_sym_idx.find(gsym_name);
+ if (pos != N_GSYM_name_to_sym_idx.end())
+ {
+ const uint32_t GSYM_sym_idx = pos->second;
+ m_nlist_idx_to_sym_idx[nlist_idx] = GSYM_sym_idx;
+ // Copy the address, because often the N_GSYM address has an invalid address of zero
+ // when the global is a common symbol
+ sym[GSYM_sym_idx].GetAddressRef().SetSection (symbol_section);
+ sym[GSYM_sym_idx].GetAddressRef().SetOffset (symbol_value);
+ // 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;
+ Error str_error;
+ if (process->ReadCStringFromMemory(str_addr, memory_symbol_name, str_error))
+ symbol_name = memory_symbol_name.c_str();
+ }
+ const char *symbol_name_non_abi_mangled = NULL;
+
+ SectionSP symbol_section;
+ lldb::addr_t symbol_byte_size = 0;
+ bool add_nlist = true;
+ bool is_gsym = false;
+ bool is_debug = ((nlist.n_type & N_STAB) != 0);
+ bool demangled_is_synthesized = false;
+ 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)
+ {
+ // 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)
+ {
+ char synthetic_function_symbol[PATH_MAX];
+ uint32_t num_synthetic_function_symbols = 0;
+ for (i=0; i<function_starts_count; ++i)
+ {
+ if (function_starts.GetEntryRef (i).data == false)
+ ++num_synthetic_function_symbols;
+ }
+
+ if (num_synthetic_function_symbols > 0)
+ {
+ if (num_syms < sym_idx + num_synthetic_function_symbols)
+ {
+ num_syms = sym_idx + num_synthetic_function_symbols;
+ sym = symtab->Resize (num_syms);
+ }
+ uint32_t synthetic_function_symbol_idx = 0;
+ for (i=0; i<function_starts_count; ++i)
+ {
+ const FunctionStarts::Entry *func_start_entry = function_starts.GetEntryAtIndex (i);
+ if (func_start_entry->data == false)
+ {
+ addr_t symbol_file_addr = func_start_entry->addr;
+ uint32_t symbol_flags = 0;
+ if (is_arm)
+ {
+ if (symbol_file_addr & 1)
+ symbol_flags = MACHO_NLIST_ARM_SYMBOL_IS_THUMB;
+ symbol_file_addr &= 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;
+ }
+ snprintf (synthetic_function_symbol,
+ sizeof(synthetic_function_symbol),
+ "___lldb_unnamed_function%u$$%s",
+ ++synthetic_function_symbol_idx,
+ module_sp->GetFileSpec().GetFilename().GetCString());
+ sym[sym_idx].SetID (synthetic_sym_id++);
+ sym[sym_idx].GetMangled().SetDemangledName(ConstString(synthetic_function_symbol));
+ sym[sym_idx].SetType (eSymbolTypeCode);
+ sym[sym_idx].SetIsSynthetic (true);
+ sym[sym_idx].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)
+ {
+ lldb_private::Mutex::Locker locker(module_sp->GetMutex());
+ s->Printf("%p: ", static_cast<void*>(this));
+ s->Indent();
+ if (m_header.magic == MH_MAGIC_64 || m_header.magic == MH_CIGAM_64)
+ s->PutCString("ObjectFileMachO64");
+ else
+ s->PutCString("ObjectFileMachO32");
+
+ ArchSpec header_arch;
+ GetArchitecture(header_arch);
+
+ *s << ", file = '" << m_file << "', arch = " << header_arch.GetArchitectureName() << "\n";
+
+ SectionList *sections = GetSectionList();
+ if (sections)
+ sections->Dump(s, NULL, true, UINT32_MAX);
+
+ if (m_symtab_ap.get())
+ m_symtab_ap->Dump(s, NULL, eSortOrderNone);
+ }
+}
+
+bool
+ObjectFileMachO::GetUUID (const llvm::MachO::mach_header &header,
+ const lldb_private::DataExtractor &data,
+ lldb::offset_t lc_offset,
+ lldb_private::UUID& uuid)
+{
+ uint32_t i;
+ struct uuid_command load_cmd;
+
+ lldb::offset_t offset = lc_offset;
+ for (i=0; i<header.ncmds; ++i)
+ {
+ const lldb::offset_t cmd_offset = offset;
+ if (data.GetU32(&offset, &load_cmd, 2) == NULL)
+ break;
+
+ if (load_cmd.cmd == LC_UUID)
+ {
+ const uint8_t *uuid_bytes = data.PeekData(offset, 16);
+
+ if (uuid_bytes)
+ {
+ // OpenCL on Mac OS X uses the same UUID for each of its object files.
+ // We pretend these object files have no UUID to prevent crashing.
+
+ const uint8_t opencl_uuid[] = { 0x8c, 0x8e, 0xb3, 0x9b,
+ 0x3b, 0xa8,
+ 0x4b, 0x16,
+ 0xb6, 0xa4,
+ 0x27, 0x63, 0xbb, 0x14, 0xf0, 0x0d };
+
+ if (!memcmp(uuid_bytes, opencl_uuid, 16))
+ return false;
+
+ uuid.SetBytes (uuid_bytes);
+ return true;
+ }
+ return false;
+ }
+ offset = cmd_offset + load_cmd.cmdsize;
+ }
+ return false;
+}
+
+bool
+ObjectFileMachO::GetArchitecture (const llvm::MachO::mach_header &header,
+ const lldb_private::DataExtractor &data,
+ lldb::offset_t lc_offset,
+ ArchSpec &arch)
+{
+ arch.SetArchitecture (eArchTypeMachO, header.cputype, header.cpusubtype);
+
+ if (arch.IsValid())
+ {
+ llvm::Triple &triple = arch.GetTriple();
+
+ // 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)
+ {
+ // Set vendor to an unspecified unknown or a "*" so it can match any vendor
+ 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;
+
+ switch (load_cmd.cmd)
+ {
+ case llvm::MachO::LC_VERSION_MIN_IPHONEOS:
+ triple.setOS (llvm::Triple::IOS);
+ return true;
+
+ case llvm::MachO::LC_VERSION_MIN_MACOSX:
+ triple.setOS (llvm::Triple::MacOSX);
+ return true;
+
+ case llvm::MachO::LC_VERSION_MIN_TVOS:
+ triple.setOS (llvm::Triple::TvOS);
+ return true;
+
+ case llvm::MachO::LC_VERSION_MIN_WATCHOS:
+ triple.setOS (llvm::Triple::WatchOS);
+ 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)
+ {
+ lldb_private::Mutex::Locker locker(module_sp->GetMutex());
+ lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
+ return GetUUID (m_header, m_data, offset, *uuid);
+ }
+ return false;
+}
+
+uint32_t
+ObjectFileMachO::GetDependentModules (FileSpecList& files)
+{
+ uint32_t count = 0;
+ ModuleSP module_sp(GetModule());
+ if (module_sp)
+ {
+ lldb_private::Mutex::Locker locker(module_sp->GetMutex());
+ struct load_command load_cmd;
+ lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
+ std::vector<std::string> rpath_paths;
+ std::vector<std::string> rpath_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
+ {
+ FileSpec file_spec(path, resolve_path);
+ if (files.AppendIfUnique(file_spec))
+ count++;
+ }
+ }
+ }
+ }
+ break;
+
+ default:
+ break;
+ }
+ offset = cmd_offset + load_cmd.cmdsize;
+ }
+
+ if (!rpath_paths.empty())
+ {
+ // Fixup all LC_RPATH values to be absolute paths
+ FileSpec this_file_spec(m_file);
+ this_file_spec.ResolvePath();
+ 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);
+ // Remove any redundant parts of the path (like "../foo") since
+ // LC_RPATH values often contain "..".
+ file_spec.NormalizePath ();
+ if (file_spec.Exists() && files.AppendIfUnique(file_spec))
+ {
+ count++;
+ break;
+ }
+ }
+ }
+ }
+ }
+ return count;
+}
+
+lldb_private::Address
+ObjectFileMachO::GetEntryPointAddress ()
+{
+ // If the object file is not an executable it can't hold the entry point. m_entry_point_address
+ // is initialized to an invalid address, so we can just return that.
+ // If m_entry_point_address is valid it means we've found it already, so return the cached value.
+
+ if (!IsExecutable() || m_entry_point_address.IsValid())
+ return m_entry_point_address;
+
+ // Otherwise, look for the UnixThread or Thread command. The data for the Thread command is given in
+ // /usr/include/mach-o.h, but it is basically:
+ //
+ // uint32_t flavor - this is the flavor argument you would pass to thread_get_state
+ // uint32_t count - this is the count of longs in the thread state data
+ // struct XXX_thread_state state - this is the structure from <machine/thread_status.h> corresponding to the flavor.
+ // <repeat this trio>
+ //
+ // So we just keep reading the various register flavors till we find the GPR one, then read the PC out of there.
+ // FIXME: We will need to have a "RegisterContext data provider" class at some point that can get all the registers
+ // out of data in this form & attach them to a given thread. That should underlie the MacOS X User process plugin,
+ // and we'll also need it for the MacOS X Core File process plugin. When we have that we can also use it here.
+ //
+ // For now we hard-code the offsets and flavors we need:
+ //
+ //
+
+ ModuleSP module_sp(GetModule());
+ if (module_sp)
+ {
+ lldb_private::Mutex::Locker locker(module_sp->GetMutex());
+ struct load_command load_cmd;
+ lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
+ uint32_t i;
+ lldb::addr_t start_address = LLDB_INVALID_ADDRESS;
+ bool done = false;
+
+ for (i=0; i<m_header.ncmds; ++i)
+ {
+ const lldb::offset_t cmd_offset = offset;
+ if (m_data.GetU32(&offset, &load_cmd, 2) == NULL)
+ break;
+
+ switch (load_cmd.cmd)
+ {
+ case LC_UNIXTHREAD:
+ case LC_THREAD:
+ {
+ while (offset < cmd_offset + load_cmd.cmdsize)
+ {
+ uint32_t flavor = m_data.GetU32(&offset);
+ uint32_t count = m_data.GetU32(&offset);
+ if (count == 0)
+ {
+ // We've gotten off somehow, log and exit;
+ return m_entry_point_address;
+ }
+
+ switch (m_header.cputype)
+ {
+ case llvm::MachO::CPU_TYPE_ARM:
+ if (flavor == 1) // ARM_THREAD_STATE from mach/arm/thread_status.h
+ {
+ offset += 60; // This is the offset of pc in the GPR thread state data structure.
+ start_address = m_data.GetU32(&offset);
+ done = true;
+ }
+ break;
+ case llvm::MachO::CPU_TYPE_ARM64:
+ if (flavor == 6) // ARM_THREAD_STATE64 from mach/arm/thread_status.h
+ {
+ offset += 256; // This is the offset of pc in the GPR thread state data structure.
+ start_address = m_data.GetU64(&offset);
+ done = true;
+ }
+ break;
+ case llvm::MachO::CPU_TYPE_I386:
+ if (flavor == 1) // x86_THREAD_STATE32 from mach/i386/thread_status.h
+ {
+ offset += 40; // This is the offset of eip in the GPR thread state data structure.
+ start_address = m_data.GetU32(&offset);
+ done = true;
+ }
+ break;
+ case llvm::MachO::CPU_TYPE_X86_64:
+ if (flavor == 4) // x86_THREAD_STATE64 from mach/i386/thread_status.h
+ {
+ offset += 16 * 8; // This is the offset of rip in the GPR thread state data structure.
+ start_address = m_data.GetU64(&offset);
+ done = true;
+ }
+ break;
+ default:
+ return m_entry_point_address;
+ }
+ // Haven't found the GPR flavor yet, skip over the data for this flavor:
+ if (done)
+ break;
+ offset += count * 4;
+ }
+ }
+ break;
+ case LC_MAIN:
+ {
+ ConstString text_segment_name ("__TEXT");
+ uint64_t entryoffset = m_data.GetU64(&offset);
+ SectionSP text_segment_sp = GetSectionList()->FindSectionByName(text_segment_name);
+ if (text_segment_sp)
+ {
+ done = true;
+ start_address = text_segment_sp->GetFileAddress() + entryoffset;
+ }
+ }
+
+ default:
+ break;
+ }
+ if (done)
+ break;
+
+ // Go to the next load command:
+ offset = cmd_offset + load_cmd.cmdsize;
+ }
+
+ if (start_address != LLDB_INVALID_ADDRESS)
+ {
+ // We got the start address from the load commands, so now resolve that address in the sections
+ // of this ObjectFile:
+ if (!m_entry_point_address.ResolveAddressUsingFileSections (start_address, GetSectionList()))
+ {
+ m_entry_point_address.Clear();
+ }
+ }
+ else
+ {
+ // We couldn't read the UnixThread load command - maybe it wasn't there. As a fallback look for the
+ // "start" symbol in the main executable.
+
+ ModuleSP module_sp (GetModule());
+
+ if (module_sp)
+ {
+ SymbolContextList contexts;
+ SymbolContext context;
+ if (module_sp->FindSymbolsWithNameAndType(ConstString ("start"), eSymbolTypeCode, contexts))
+ {
+ if (contexts.GetContextAtIndex(0, context))
+ m_entry_point_address = context.symbol->GetAddress();
+ }
+ }
+ }
+ }
+
+ return m_entry_point_address;
+}
+
+lldb_private::Address
+ObjectFileMachO::GetHeaderAddress ()
+{
+ lldb_private::Address header_addr;
+ SectionList *section_list = GetSectionList();
+ if (section_list)
+ {
+ SectionSP text_segment_sp (section_list->FindSectionByName (GetSegmentNameTEXT()));
+ if (text_segment_sp)
+ {
+ header_addr.SetSection (text_segment_sp);
+ header_addr.SetOffset (0);
+ }
+ }
+ return header_addr;
+}
+
+uint32_t
+ObjectFileMachO::GetNumThreadContexts ()
+{
+ ModuleSP module_sp(GetModule());
+ if (module_sp)
+ {
+ lldb_private::Mutex::Locker locker(module_sp->GetMutex());
+ if (!m_thread_context_offsets_valid)
+ {
+ m_thread_context_offsets_valid = true;
+ lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
+ FileRangeArray::Entry file_range;
+ thread_command thread_cmd;
+ for (uint32_t i=0; i<m_header.ncmds; ++i)
+ {
+ const uint32_t cmd_offset = offset;
+ if (m_data.GetU32(&offset, &thread_cmd, 2) == NULL)
+ break;
+
+ if (thread_cmd.cmd == LC_THREAD)
+ {
+ file_range.SetRangeBase (offset);
+ file_range.SetByteSize (thread_cmd.cmdsize - 8);
+ m_thread_context_offsets.Append (file_range);
+ }
+ offset = cmd_offset + thread_cmd.cmdsize;
+ }
+ }
+ }
+ return m_thread_context_offsets.GetSize();
+}
+
+lldb::RegisterContextSP
+ObjectFileMachO::GetThreadContextAtIndex (uint32_t idx, lldb_private::Thread &thread)
+{
+ lldb::RegisterContextSP reg_ctx_sp;
+
+ ModuleSP module_sp(GetModule());
+ if (module_sp)
+ {
+ lldb_private::Mutex::Locker locker(module_sp->GetMutex());
+ if (!m_thread_context_offsets_valid)
+ GetNumThreadContexts ();
+
+ const FileRangeArray::Entry *thread_context_file_range = m_thread_context_offsets.GetEntryAtIndex (idx);
+ if (thread_context_file_range)
+ {
+
+ DataExtractor data (m_data,
+ thread_context_file_range->GetRangeBase(),
+ thread_context_file_range->GetByteSize());
+
+ switch (m_header.cputype)
+ {
+ case llvm::MachO::CPU_TYPE_ARM64:
+ reg_ctx_sp.reset (new RegisterContextDarwin_arm64_Mach (thread, data));
+ break;
+
+ case llvm::MachO::CPU_TYPE_ARM:
+ reg_ctx_sp.reset (new RegisterContextDarwin_arm_Mach (thread, data));
+ break;
+
+ case llvm::MachO::CPU_TYPE_I386:
+ reg_ctx_sp.reset (new RegisterContextDarwin_i386_Mach (thread, data));
+ break;
+
+ case llvm::MachO::CPU_TYPE_X86_64:
+ reg_ctx_sp.reset (new RegisterContextDarwin_x86_64_Mach (thread, data));
+ break;
+ }
+ }
+ }
+ return reg_ctx_sp;
+}
+
+ObjectFile::Type
+ObjectFileMachO::CalculateType()
+{
+ switch (m_header.filetype)
+ {
+ case MH_OBJECT: // 0x1u
+ if (GetAddressByteSize () == 4)
+ {
+ // 32 bit kexts are just object files, but they do have a valid
+ // UUID load command.
+ UUID uuid;
+ if (GetUUID(&uuid))
+ {
+ // this checking for the UUID load command is not enough
+ // we could eventually look for the symbol named
+ // "OSKextGetCurrentIdentifier" as this is required of kexts
+ if (m_strata == eStrataInvalid)
+ m_strata = eStrataKernel;
+ return eTypeSharedLibrary;
+ }
+ }
+ return eTypeObjectFile;
+
+ case MH_EXECUTE: return eTypeExecutable; // 0x2u
+ case MH_FVMLIB: return eTypeSharedLibrary; // 0x3u
+ case MH_CORE: return eTypeCoreFile; // 0x4u
+ case MH_PRELOAD: return eTypeSharedLibrary; // 0x5u
+ case MH_DYLIB: return eTypeSharedLibrary; // 0x6u
+ case MH_DYLINKER: return eTypeDynamicLinker; // 0x7u
+ case MH_BUNDLE: return eTypeSharedLibrary; // 0x8u
+ case MH_DYLIB_STUB: return eTypeStubLibrary; // 0x9u
+ case MH_DSYM: return eTypeDebugInfo; // 0xAu
+ case MH_KEXT_BUNDLE: return eTypeSharedLibrary; // 0xBu
+ default:
+ break;
+ }
+ return eTypeUnknown;
+}
+
+ObjectFile::Strata
+ObjectFileMachO::CalculateStrata()
+{
+ switch (m_header.filetype)
+ {
+ case MH_OBJECT: // 0x1u
+ {
+ // 32 bit kexts are just object files, but they do have a valid
+ // UUID load command.
+ UUID uuid;
+ if (GetUUID(&uuid))
+ {
+ // this checking for the UUID load command is not enough
+ // we could eventually look for the symbol named
+ // "OSKextGetCurrentIdentifier" as this is required of kexts
+ if (m_type == eTypeInvalid)
+ m_type = eTypeSharedLibrary;
+
+ return eStrataKernel;
+ }
+ }
+ return eStrataUnknown;
+
+ case MH_EXECUTE: // 0x2u
+ // Check for the MH_DYLDLINK bit in the flags
+ if (m_header.flags & MH_DYLDLINK)
+ {
+ return eStrataUser;
+ }
+ else
+ {
+ SectionList *section_list = GetSectionList();
+ if (section_list)
+ {
+ static ConstString g_kld_section_name ("__KLD");
+ if (section_list->FindSectionByName(g_kld_section_name))
+ return eStrataKernel;
+ }
+ }
+ return eStrataRawImage;
+
+ case MH_FVMLIB: return eStrataUser; // 0x3u
+ case MH_CORE: return eStrataUnknown; // 0x4u
+ case MH_PRELOAD: return eStrataRawImage; // 0x5u
+ case MH_DYLIB: return eStrataUser; // 0x6u
+ case MH_DYLINKER: return eStrataUser; // 0x7u
+ case MH_BUNDLE: return eStrataUser; // 0x8u
+ case MH_DYLIB_STUB: return eStrataUser; // 0x9u
+ case MH_DSYM: return eStrataUnknown; // 0xAu
+ case MH_KEXT_BUNDLE: return eStrataKernel; // 0xBu
+ default:
+ break;
+ }
+ return eStrataUnknown;
+}
+
+uint32_t
+ObjectFileMachO::GetVersion (uint32_t *versions, uint32_t num_versions)
+{
+ ModuleSP module_sp(GetModule());
+ if (module_sp)
+ {
+ lldb_private::Mutex::Locker locker(module_sp->GetMutex());
+ struct dylib_command load_cmd;
+ lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
+ uint32_t version_cmd = 0;
+ uint64_t version = 0;
+ uint32_t i;
+ for (i=0; i<m_header.ncmds; ++i)
+ {
+ const lldb::offset_t cmd_offset = offset;
+ if (m_data.GetU32(&offset, &load_cmd, 2) == NULL)
+ break;
+
+ if (load_cmd.cmd == LC_ID_DYLIB)
+ {
+ if (version_cmd == 0)
+ {
+ version_cmd = load_cmd.cmd;
+ if (m_data.GetU32(&offset, &load_cmd.dylib, 4) == NULL)
+ break;
+ version = load_cmd.dylib.current_version;
+ }
+ break; // Break for now unless there is another more complete version
+ // number load command in the future.
+ }
+ offset = cmd_offset + load_cmd.cmdsize;
+ }
+
+ if (version_cmd == LC_ID_DYLIB)
+ {
+ if (versions != NULL && num_versions > 0)
+ {
+ if (num_versions > 0)
+ versions[0] = (version & 0xFFFF0000ull) >> 16;
+ if (num_versions > 1)
+ versions[1] = (version & 0x0000FF00ull) >> 8;
+ if (num_versions > 2)
+ versions[2] = (version & 0x000000FFull);
+ // Fill in an remaining version numbers with invalid values
+ for (i=3; i<num_versions; ++i)
+ versions[i] = UINT32_MAX;
+ }
+ // The LC_ID_DYLIB load command has a version with 3 version numbers
+ // in it, so always return 3
+ return 3;
+ }
+ }
+ return false;
+}
+
+bool
+ObjectFileMachO::GetArchitecture (ArchSpec &arch)
+{
+ ModuleSP module_sp(GetModule());
+ if (module_sp)
+ {
+ lldb_private::Mutex::Locker locker(module_sp->GetMutex());
+ return GetArchitecture (m_header, m_data, MachHeaderSizeFromMagic(m_header.magic), arch);
+ }
+ return false;
+}
+
+UUID
+ObjectFileMachO::GetProcessSharedCacheUUID (Process *process)
+{
+ UUID uuid;
+ if (process)
+ {
+ addr_t all_image_infos = process->GetImageInfoAddress();
+
+ // The address returned by GetImageInfoAddress may be the address of dyld (don't want)
+ // or it may be the address of the dyld_all_image_infos structure (want). The first four
+ // bytes will be either the version field (all_image_infos) or a Mach-O file magic constant.
+ // Version 13 and higher of dyld_all_image_infos is required to get the sharedCacheUUID field.
+
+ Error err;
+ uint32_t version_or_magic = process->ReadUnsignedIntegerFromMemory (all_image_infos, 4, -1, err);
+ if (version_or_magic != static_cast<uint32_t>(-1)
+ && version_or_magic != MH_MAGIC
+ && version_or_magic != MH_CIGAM
+ && version_or_magic != MH_MAGIC_64
+ && version_or_magic != MH_CIGAM_64
+ && version_or_magic >= 13)
+ {
+ addr_t sharedCacheUUID_address = LLDB_INVALID_ADDRESS;
+ int wordsize = process->GetAddressByteSize();
+ if (wordsize == 8)
+ {
+ sharedCacheUUID_address = all_image_infos + 160; // sharedCacheUUID <mach-o/dyld_images.h>
+ }
+ if (wordsize == 4)
+ {
+ sharedCacheUUID_address = all_image_infos + 84; // sharedCacheUUID <mach-o/dyld_images.h>
+ }
+ if (sharedCacheUUID_address != LLDB_INVALID_ADDRESS)
+ {
+ uuid_t shared_cache_uuid;
+ if (process->ReadMemory (sharedCacheUUID_address, shared_cache_uuid, sizeof (uuid_t), err) == sizeof (uuid_t))
+ {
+ uuid.SetBytes (shared_cache_uuid);
+ }
+ }
+ }
+ }
+ return uuid;
+}
+
+UUID
+ObjectFileMachO::GetLLDBSharedCacheUUID ()
+{
+ UUID uuid;
+#if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__))
+ uint8_t *(*dyld_get_all_image_infos)(void);
+ dyld_get_all_image_infos = (uint8_t*(*)()) dlsym (RTLD_DEFAULT, "_dyld_get_all_image_infos");
+ if (dyld_get_all_image_infos)
+ {
+ uint8_t *dyld_all_image_infos_address = dyld_get_all_image_infos();
+ if (dyld_all_image_infos_address)
+ {
+ uint32_t *version = (uint32_t*) dyld_all_image_infos_address; // version <mach-o/dyld_images.h>
+ if (*version >= 13)
+ {
+ uuid_t *sharedCacheUUID_address = 0;
+ int wordsize = sizeof (uint8_t *);
+ if (wordsize == 8)
+ {
+ sharedCacheUUID_address = (uuid_t*) ((uint8_t*) dyld_all_image_infos_address + 160); // sharedCacheUUID <mach-o/dyld_images.h>
+ }
+ else
+ {
+ sharedCacheUUID_address = (uuid_t*) ((uint8_t*) dyld_all_image_infos_address + 84); // sharedCacheUUID <mach-o/dyld_images.h>
+ }
+ uuid.SetBytes (sharedCacheUUID_address);
+ }
+ }
+ }
+#endif
+ return uuid;
+}
+
+uint32_t
+ObjectFileMachO::GetMinimumOSVersion (uint32_t *versions, uint32_t num_versions)
+{
+ if (m_min_os_versions.empty())
+ {
+ lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
+ bool success = false;
+ for (uint32_t i=0; success == false && i < m_header.ncmds; ++i)
+ {
+ const lldb::offset_t load_cmd_offset = offset;
+
+ version_min_command lc;
+ if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL)
+ break;
+ if (lc.cmd == 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_versions.push_back(xxxx);
+ m_min_os_versions.push_back(yy);
+ m_min_os_versions.push_back(zz);
+ }
+ success = true;
+ }
+ }
+ offset = load_cmd_offset + lc.cmdsize;
+ }
+
+ if (success == false)
+ {
+ // Push an invalid value so we don't keep trying to
+ m_min_os_versions.push_back(UINT32_MAX);
+ }
+ }
+
+ if (m_min_os_versions.size() > 1 || m_min_os_versions[0] != UINT32_MAX)
+ {
+ if (versions != NULL && num_versions > 0)
+ {
+ for (size_t i=0; i<num_versions; ++i)
+ {
+ if (i < m_min_os_versions.size())
+ versions[i] = m_min_os_versions[i];
+ else
+ versions[i] = 0;
+ }
+ }
+ return m_min_os_versions.size();
+ }
+ // Call the superclasses version that will empty out the data
+ return ObjectFile::GetMinimumOSVersion (versions, num_versions);
+}
+
+uint32_t
+ObjectFileMachO::GetSDKVersion(uint32_t *versions, uint32_t num_versions)
+{
+ if (m_sdk_versions.empty())
+ {
+ lldb::offset_t offset = MachHeaderSizeFromMagic(m_header.magic);
+ bool success = false;
+ for (uint32_t i=0; success == false && i < m_header.ncmds; ++i)
+ {
+ const lldb::offset_t load_cmd_offset = offset;
+
+ version_min_command lc;
+ if (m_data.GetU32(&offset, &lc.cmd, 2) == NULL)
+ break;
+ if (lc.cmd == 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;
+ }
+ }
+ offset = load_cmd_offset + lc.cmdsize;
+ }
+
+ if (success == false)
+ {
+ // Push an invalid value so we don't keep trying to
+ m_sdk_versions.push_back(UINT32_MAX);
+ }
+ }
+
+ if (m_sdk_versions.size() > 1 || m_sdk_versions[0] != UINT32_MAX)
+ {
+ if (versions != NULL && num_versions > 0)
+ {
+ for (size_t i=0; i<num_versions; ++i)
+ {
+ if (i < m_sdk_versions.size())
+ versions[i] = m_sdk_versions[i];
+ else
+ versions[i] = 0;
+ }
+ }
+ return m_sdk_versions.size();
+ }
+ // Call the superclasses version that will empty out the data
+ return ObjectFile::GetSDKVersion (versions, num_versions);
+}
+
+bool
+ObjectFileMachO::GetIsDynamicLinkEditor()
+{
+ return m_header.filetype == llvm::MachO::MH_DYLINKER;
+}
+
+//------------------------------------------------------------------
+// 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,
+ Error &error)
+{
+ if (process_sp)
+ {
+ Target &target = process_sp->GetTarget();
+ const ArchSpec target_arch = target.GetArchitecture();
+ const llvm::Triple &target_triple = target_arch.GetTriple();
+ if (target_triple.getVendor() == llvm::Triple::Apple &&
+ (target_triple.getOS() == llvm::Triple::MacOSX
+ || target_triple.getOS() == llvm::Triple::IOS
+ || 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;
+ Error 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.GetData(), LC_THREAD_data_size);
+ }
+
+ // Write out all of the segment load commands
+ for (const auto &segment : segment_load_commands)
+ {
+ printf ("0x%8.8x 0x%8.8x [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ") [0x%16.16" PRIx64 " 0x%16.16" PRIx64 ") 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x]\n",
+ segment.cmd,
+ segment.cmdsize,
+ segment.vmaddr,
+ segment.vmaddr + segment.vmsize,
+ segment.fileoff,
+ segment.filesize,
+ segment.maxprot,
+ segment.initprot,
+ segment.nsects,
+ segment.flags);
+
+ buffer.PutHex32(segment.cmd);
+ buffer.PutHex32(segment.cmdsize);
+ buffer.PutRawBytes(segment.segname, sizeof(segment.segname));
+ 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;
+ Error memory_read_error;
+ while (bytes_left > 0 && error.Success())
+ {
+ const size_t bytes_to_read = bytes_left > sizeof(bytes) ? sizeof(bytes) : bytes_left;
+ const size_t bytes_read = process_sp->ReadMemory(addr, bytes, bytes_to_read, memory_read_error);
+ if (bytes_read == bytes_to_read)
+ {
+ size_t bytes_written = bytes_read;
+ error = core_file.Write(bytes, bytes_written);
+ bytes_left -= bytes_read;
+ addr += bytes_read;
+ }
+ else
+ {
+ // Some pages within regions are not readable, those
+ // should be zero filled
+ memset (bytes, 0, bytes_to_read);
+ size_t bytes_written = bytes_to_read;
+ error = core_file.Write(bytes, bytes_written);
+ bytes_left -= bytes_to_read;
+ addr += bytes_to_read;
+ }
+ }
+ }
+ }
+ }
+ }
+ else
+ {
+ error.SetErrorString("process doesn't support getting memory region info");
+ }
+ }
+ return true; // This is the right plug to handle saving core files for this process
+ }
+ }
+ return false;
+}
diff --git a/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.h b/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.h
new file mode 100644
index 0000000000000..6b7ad531b83bf
--- /dev/null
+++ b/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.h
@@ -0,0 +1,252 @@
+//===-- ObjectFileMachO.h ---------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_ObjectFileMachO_h_
+#define liblldb_ObjectFileMachO_h_
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+#include "lldb/Utility/SafeMachO.h"
+#include "lldb/Core/Address.h"
+#include "lldb/Core/FileSpecList.h"
+#include "lldb/Core/RangeMap.h"
+#include "lldb/Host/FileSpec.h"
+#include "lldb/Host/Mutex.h"
+#include "lldb/Symbol/ObjectFile.h"
+
+//----------------------------------------------------------------------
+// This class needs to be hidden as eventually belongs in a plugin that
+// will export the ObjectFile protocol
+//----------------------------------------------------------------------
+class ObjectFileMachO :
+ public lldb_private::ObjectFile
+{
+public:
+ ObjectFileMachO(const lldb::ModuleSP &module_sp,
+ lldb::DataBufferSP& data_sp,
+ lldb::offset_t data_offset,
+ const lldb_private::FileSpec* file,
+ lldb::offset_t offset,
+ lldb::offset_t length);
+
+ ObjectFileMachO(const lldb::ModuleSP &module_sp,
+ lldb::DataBufferSP& data_sp,
+ const lldb::ProcessSP &process_sp,
+ lldb::addr_t header_addr);
+
+ ~ObjectFileMachO() override = default;
+
+ //------------------------------------------------------------------
+ // Static Functions
+ //------------------------------------------------------------------
+ static void
+ Initialize();
+
+ static void
+ Terminate();
+
+ static lldb_private::ConstString
+ GetPluginNameStatic();
+
+ static const char *
+ GetPluginDescriptionStatic();
+
+ static lldb_private::ObjectFile *
+ CreateInstance (const lldb::ModuleSP &module_sp,
+ lldb::DataBufferSP& data_sp,
+ lldb::offset_t data_offset,
+ const lldb_private::FileSpec* file,
+ lldb::offset_t file_offset,
+ lldb::offset_t length);
+
+ static lldb_private::ObjectFile *
+ CreateMemoryInstance (const lldb::ModuleSP &module_sp,
+ lldb::DataBufferSP& data_sp,
+ const lldb::ProcessSP &process_sp,
+ lldb::addr_t header_addr);
+
+ static size_t
+ 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);
+
+ static bool
+ SaveCore (const lldb::ProcessSP &process_sp,
+ const lldb_private::FileSpec &outfile,
+ lldb_private::Error &error);
+
+ static bool
+ MagicBytesMatch (lldb::DataBufferSP& data_sp,
+ lldb::addr_t offset,
+ lldb::addr_t length);
+
+ //------------------------------------------------------------------
+ // Member Functions
+ //------------------------------------------------------------------
+ bool
+ ParseHeader() override;
+
+ bool
+ SetLoadAddress(lldb_private::Target &target,
+ lldb::addr_t value,
+ bool value_is_offset) override;
+
+ lldb::ByteOrder
+ GetByteOrder() const override;
+
+ bool
+ IsExecutable() const override;
+
+ uint32_t
+ GetAddressByteSize() const override;
+
+ lldb::AddressClass
+ GetAddressClass(lldb::addr_t file_addr) override;
+
+ lldb_private::Symtab *
+ GetSymtab() override;
+
+ bool
+ IsStripped() override;
+
+ void
+ CreateSections(lldb_private::SectionList &unified_section_list) override;
+
+ void
+ Dump(lldb_private::Stream *s) override;
+
+ bool
+ GetArchitecture(lldb_private::ArchSpec &arch) override;
+
+ bool
+ GetUUID(lldb_private::UUID* uuid) override;
+
+ uint32_t
+ GetDependentModules(lldb_private::FileSpecList& files) override;
+
+ lldb_private::FileSpecList
+ GetReExportedLibraries() override
+ {
+ return m_reexported_dylibs;
+ }
+
+ lldb_private::Address
+ GetEntryPointAddress() override;
+
+ lldb_private::Address
+ GetHeaderAddress() override;
+
+ uint32_t
+ GetNumThreadContexts() override;
+
+ lldb::RegisterContextSP
+ GetThreadContextAtIndex(uint32_t idx, lldb_private::Thread &thread) override;
+
+ ObjectFile::Type
+ CalculateType() override;
+
+ ObjectFile::Strata
+ CalculateStrata() override;
+
+ uint32_t
+ GetVersion(uint32_t *versions, uint32_t num_versions) override;
+
+ uint32_t
+ GetMinimumOSVersion(uint32_t *versions, uint32_t num_versions) override;
+
+ uint32_t
+ GetSDKVersion(uint32_t *versions, uint32_t num_versions) override;
+
+ bool
+ GetIsDynamicLinkEditor() override;
+
+ static bool
+ ParseHeader (lldb_private::DataExtractor &data,
+ lldb::offset_t *data_offset_ptr,
+ llvm::MachO::mach_header &header);
+
+ //------------------------------------------------------------------
+ // PluginInterface protocol
+ //------------------------------------------------------------------
+ lldb_private::ConstString
+ GetPluginName() override;
+
+ uint32_t
+ GetPluginVersion() override;
+
+protected:
+ static bool
+ GetUUID (const llvm::MachO::mach_header &header,
+ const lldb_private::DataExtractor &data,
+ lldb::offset_t lc_offset, // Offset to the first load command
+ lldb_private::UUID& uuid);
+
+ static bool
+ GetArchitecture (const llvm::MachO::mach_header &header,
+ const lldb_private::DataExtractor &data,
+ lldb::offset_t lc_offset,
+ lldb_private::ArchSpec &arch);
+
+ // Intended for same-host arm device debugging where lldb needs to
+ // detect libraries in the shared cache and augment the nlist entries
+ // with an on-disk dyld_shared_cache file. The process will record
+ // the shared cache UUID so the on-disk cache can be matched or rejected
+ // correctly.
+ lldb_private::UUID
+ GetProcessSharedCacheUUID (lldb_private::Process *);
+
+ // Intended for same-host arm device debugging where lldb will read
+ // shared cache libraries out of its own memory instead of the remote
+ // process' memory as an optimization. If lldb's shared cache UUID
+ // does not match the process' shared cache UUID, this optimization
+ // should not be used.
+ lldb_private::UUID
+ GetLLDBSharedCacheUUID ();
+
+ lldb_private::Section *
+ GetMachHeaderSection();
+
+ lldb::addr_t
+ CalculateSectionLoadAddressForMemoryImage(lldb::addr_t mach_header_load_address,
+ const lldb_private::Section *mach_header_section,
+ const lldb_private::Section *section);
+
+ lldb_private::UUID
+ GetSharedCacheUUID (lldb_private::FileSpec dyld_shared_cache, const lldb::ByteOrder byte_order, const uint32_t addr_byte_size);
+
+ size_t
+ ParseSymtab();
+
+ llvm::MachO::mach_header m_header;
+ static const lldb_private::ConstString &GetSegmentNameTEXT();
+ static const lldb_private::ConstString &GetSegmentNameDATA();
+ static const lldb_private::ConstString &GetSegmentNameDATA_DIRTY();
+ static const lldb_private::ConstString &GetSegmentNameDATA_CONST();
+ static const lldb_private::ConstString &GetSegmentNameOBJC();
+ static const lldb_private::ConstString &GetSegmentNameLINKEDIT();
+ static const lldb_private::ConstString &GetSectionNameEHFrame();
+
+ llvm::MachO::dysymtab_command m_dysymtab;
+ std::vector<llvm::MachO::segment_command_64> m_mach_segments;
+ std::vector<llvm::MachO::section_64> m_mach_sections;
+ std::vector<uint32_t> m_min_os_versions;
+ std::vector<uint32_t> m_sdk_versions;
+ typedef lldb_private::RangeVector<uint32_t, uint32_t> FileRangeArray;
+ lldb_private::Address m_entry_point_address;
+ FileRangeArray m_thread_context_offsets;
+ bool m_thread_context_offsets_valid;
+ lldb_private::FileSpecList m_reexported_dylibs;
+};
+
+#endif // liblldb_ObjectFileMachO_h_
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 04:31:39 +0000