| //===-- Symbols.cpp ---------------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "lldb/Host/Symbols.h" |
| |
| // C Includes |
| #include <dirent.h> |
| #include "llvm/Support/MachO.h" |
| |
| // C++ Includes |
| // Other libraries and framework includes |
| #include <CoreFoundation/CoreFoundation.h> |
| |
| // Project includes |
| #include "lldb/Core/ArchSpec.h" |
| #include "lldb/Core/DataBuffer.h" |
| #include "lldb/Core/DataExtractor.h" |
| #include "lldb/Core/Timer.h" |
| #include "lldb/Core/UUID.h" |
| #include "lldb/Host/Endian.h" |
| #include "lldb/Utility/CleanUp.h" |
| |
| #include "Host/macosx/cfcpp/CFCReleaser.h" |
| #include "mach/machine.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| using namespace llvm::MachO; |
| |
| extern "C" { |
| |
| CFURLRef DBGCopyFullDSYMURLForUUID (CFUUIDRef uuid, CFURLRef exec_url); |
| CFDictionaryRef DBGCopyDSYMPropertyLists (CFURLRef dsym_url); |
| |
| } |
| |
| static bool |
| SkinnyMachOFileContainsArchAndUUID |
| ( |
| const FileSpec &file_spec, |
| const ArchSpec *arch, |
| const lldb_private::UUID *uuid, // the UUID we are looking for |
| off_t file_offset, |
| DataExtractor& data, |
| uint32_t data_offset, |
| const uint32_t magic |
| ) |
| { |
| assert(magic == HeaderMagic32 || magic == HeaderMagic32Swapped || magic == HeaderMagic64 || magic == HeaderMagic64Swapped); |
| if (magic == HeaderMagic32 || magic == HeaderMagic64) |
| data.SetByteOrder (lldb::endian::InlHostByteOrder()); |
| else if (lldb::endian::InlHostByteOrder() == eByteOrderBig) |
| data.SetByteOrder (eByteOrderLittle); |
| else |
| data.SetByteOrder (eByteOrderBig); |
| |
| uint32_t i; |
| const uint32_t cputype = data.GetU32(&data_offset); // cpu specifier |
| const uint32_t cpusubtype = data.GetU32(&data_offset); // machine specifier |
| data_offset+=4; // Skip mach file type |
| const uint32_t ncmds = data.GetU32(&data_offset); // number of load commands |
| const uint32_t sizeofcmds = data.GetU32(&data_offset); // the size of all the load commands |
| data_offset+=4; // Skip flags |
| |
| // Check the architecture if we have a valid arch pointer |
| if (arch) |
| { |
| ArchSpec file_arch(eArchTypeMachO, cputype, cpusubtype); |
| |
| if (file_arch != *arch) |
| return false; |
| } |
| |
| // The file exists, and if a valid arch pointer was passed in we know |
| // if already matches, so we can return if we aren't looking for a specific |
| // UUID |
| if (uuid == NULL) |
| return true; |
| |
| if (magic == HeaderMagic64Swapped || magic == HeaderMagic64) |
| data_offset += 4; // Skip reserved field for in mach_header_64 |
| |
| // Make sure we have enough data for all the load commands |
| if (magic == HeaderMagic64Swapped || magic == HeaderMagic64) |
| { |
| if (data.GetByteSize() < sizeof(struct mach_header_64) + sizeofcmds) |
| { |
| DataBufferSP data_buffer_sp (file_spec.ReadFileContents (file_offset, sizeof(struct mach_header_64) + sizeofcmds)); |
| data.SetData (data_buffer_sp); |
| } |
| } |
| else |
| { |
| if (data.GetByteSize() < sizeof(struct mach_header) + sizeofcmds) |
| { |
| DataBufferSP data_buffer_sp (file_spec.ReadFileContents (file_offset, sizeof(struct mach_header) + sizeofcmds)); |
| data.SetData (data_buffer_sp); |
| } |
| } |
| |
| for (i=0; i<ncmds; i++) |
| { |
| const uint32_t cmd_offset = data_offset; // Save this data_offset in case parsing of the segment goes awry! |
| uint32_t cmd = data.GetU32(&data_offset); |
| uint32_t cmd_size = data.GetU32(&data_offset); |
| if (cmd == LoadCommandUUID) |
| { |
| lldb_private::UUID file_uuid (data.GetData(&data_offset, 16), 16); |
| return file_uuid == *uuid; |
| } |
| data_offset = cmd_offset + cmd_size; |
| } |
| return false; |
| } |
| |
| bool |
| UniversalMachOFileContainsArchAndUUID |
| ( |
| const FileSpec &file_spec, |
| const ArchSpec *arch, |
| const lldb_private::UUID *uuid, |
| off_t file_offset, |
| DataExtractor& data, |
| uint32_t data_offset, |
| const uint32_t magic |
| ) |
| { |
| assert(magic == UniversalMagic || magic == UniversalMagicSwapped); |
| |
| // Universal mach-o files always have their headers encoded as BIG endian |
| data.SetByteOrder(eByteOrderBig); |
| |
| uint32_t i; |
| const uint32_t nfat_arch = data.GetU32(&data_offset); // number of structs that follow |
| const uint32_t fat_header_and_arch_size = sizeof(struct fat_header) + nfat_arch * sizeof(struct fat_arch); |
| if (data.GetByteSize() < fat_header_and_arch_size) |
| { |
| DataBufferSP data_buffer_sp (file_spec.ReadFileContents (file_offset, fat_header_and_arch_size)); |
| data.SetData (data_buffer_sp); |
| } |
| |
| for (i=0; i<nfat_arch; i++) |
| { |
| cpu_type_t arch_cputype = data.GetU32(&data_offset); // cpu specifier (int) |
| cpu_subtype_t arch_cpusubtype = data.GetU32(&data_offset); // machine specifier (int) |
| uint32_t arch_offset = data.GetU32(&data_offset); // file offset to this object file |
| // uint32_t arch_size = data.GetU32(&data_offset); // size of this object file |
| // uint32_t arch_align = data.GetU32(&data_offset); // alignment as a power of 2 |
| data_offset += 8; // Skip size and align as we don't need those |
| // Only process this slice if the cpu type/subtype matches |
| if (arch) |
| { |
| ArchSpec fat_arch(eArchTypeMachO, arch_cputype, arch_cpusubtype); |
| if (fat_arch != *arch) |
| continue; |
| } |
| |
| // Create a buffer with only the arch slice date in it |
| DataExtractor arch_data; |
| DataBufferSP data_buffer_sp (file_spec.ReadFileContents (file_offset + arch_offset, 0x1000)); |
| arch_data.SetData(data_buffer_sp); |
| uint32_t arch_data_offset = 0; |
| uint32_t arch_magic = arch_data.GetU32(&arch_data_offset); |
| |
| switch (arch_magic) |
| { |
| case HeaderMagic32: |
| case HeaderMagic32Swapped: |
| case HeaderMagic64: |
| case HeaderMagic64Swapped: |
| if (SkinnyMachOFileContainsArchAndUUID (file_spec, arch, uuid, file_offset + arch_offset, arch_data, arch_data_offset, arch_magic)) |
| return true; |
| break; |
| } |
| } |
| return false; |
| } |
| |
| static bool |
| FileAtPathContainsArchAndUUID |
| ( |
| const FileSpec &file_spec, |
| const ArchSpec *arch, |
| const lldb_private::UUID *uuid |
| ) |
| { |
| DataExtractor data; |
| off_t file_offset = 0; |
| DataBufferSP data_buffer_sp (file_spec.ReadFileContents (file_offset, 0x1000)); |
| |
| if (data_buffer_sp && data_buffer_sp->GetByteSize() > 0) |
| { |
| data.SetData(data_buffer_sp); |
| |
| uint32_t data_offset = 0; |
| uint32_t magic = data.GetU32(&data_offset); |
| |
| switch (magic) |
| { |
| // 32 bit mach-o file |
| case HeaderMagic32: |
| case HeaderMagic32Swapped: |
| case HeaderMagic64: |
| case HeaderMagic64Swapped: |
| return SkinnyMachOFileContainsArchAndUUID (file_spec, arch, uuid, file_offset, data, data_offset, magic); |
| |
| // fat mach-o file |
| case UniversalMagic: |
| case UniversalMagicSwapped: |
| return UniversalMachOFileContainsArchAndUUID (file_spec, arch, uuid, file_offset, data, data_offset, magic); |
| |
| default: |
| break; |
| } |
| } |
| return false; |
| } |
| |
| static FileSpec |
| LocateDSYMMachFileInDSYMBundle |
| ( |
| const FileSpec& dsym_bundle_fspec, |
| const lldb_private::UUID *uuid, |
| const ArchSpec *arch) |
| { |
| char path[PATH_MAX]; |
| |
| FileSpec dsym_fspec; |
| |
| if (dsym_bundle_fspec.GetPath(path, sizeof(path))) |
| { |
| ::strncat (path, "/Contents/Resources/DWARF", sizeof(path) - strlen(path) - 1); |
| |
| lldb_utility::CleanUp <DIR *, int> dirp (opendir(path), NULL, closedir); |
| if (dirp.is_valid()) |
| { |
| dsym_fspec.GetDirectory().SetCString(path); |
| struct dirent* dp; |
| while ((dp = readdir(dirp.get())) != NULL) |
| { |
| // Only search directories |
| if (dp->d_type == DT_DIR || dp->d_type == DT_UNKNOWN) |
| { |
| if (dp->d_namlen == 1 && dp->d_name[0] == '.') |
| continue; |
| |
| if (dp->d_namlen == 2 && dp->d_name[0] == '.' && dp->d_name[1] == '.') |
| continue; |
| } |
| |
| if (dp->d_type == DT_REG || dp->d_type == DT_UNKNOWN) |
| { |
| dsym_fspec.GetFilename().SetCString(dp->d_name); |
| if (FileAtPathContainsArchAndUUID (dsym_fspec, arch, uuid)) |
| return dsym_fspec; |
| } |
| } |
| } |
| } |
| dsym_fspec.Clear(); |
| return dsym_fspec; |
| } |
| |
| static int |
| LocateMacOSXFilesUsingDebugSymbols |
| ( |
| const FileSpec *exec_fspec, // An executable path that may or may not be correct if UUID is specified |
| const ArchSpec* arch, // Limit the search to files with this architecture if non-NULL |
| const lldb_private::UUID *uuid, // Match the UUID value if non-NULL, |
| FileSpec *out_exec_fspec, // If non-NULL, try and find the executable |
| FileSpec *out_dsym_fspec // If non-NULL try and find the debug symbol file |
| ) |
| { |
| int items_found = 0; |
| |
| if (out_exec_fspec) |
| out_exec_fspec->Clear(); |
| |
| if (out_dsym_fspec) |
| out_dsym_fspec->Clear(); |
| |
| if (uuid && uuid->IsValid()) |
| { |
| // Try and locate the dSYM file using DebugSymbols first |
| const UInt8 *module_uuid = (const UInt8 *)uuid->GetBytes(); |
| if (module_uuid != NULL) |
| { |
| CFCReleaser<CFUUIDRef> module_uuid_ref(::CFUUIDCreateWithBytes ( NULL, |
| module_uuid[0], |
| module_uuid[1], |
| module_uuid[2], |
| module_uuid[3], |
| module_uuid[4], |
| module_uuid[5], |
| module_uuid[6], |
| module_uuid[7], |
| module_uuid[8], |
| module_uuid[9], |
| module_uuid[10], |
| module_uuid[11], |
| module_uuid[12], |
| module_uuid[13], |
| module_uuid[14], |
| module_uuid[15])); |
| |
| if (module_uuid_ref.get()) |
| { |
| CFCReleaser<CFURLRef> exec_url; |
| |
| if (exec_fspec) |
| { |
| char exec_cf_path[PATH_MAX]; |
| if (exec_fspec->GetPath(exec_cf_path, sizeof(exec_cf_path))) |
| exec_url.reset(::CFURLCreateFromFileSystemRepresentation (NULL, |
| (const UInt8 *)exec_cf_path, |
| strlen(exec_cf_path), |
| FALSE)); |
| } |
| |
| CFCReleaser<CFURLRef> dsym_url (::DBGCopyFullDSYMURLForUUID(module_uuid_ref.get(), exec_url.get())); |
| char path[PATH_MAX]; |
| |
| if (dsym_url.get()) |
| { |
| if (out_dsym_fspec) |
| { |
| if (::CFURLGetFileSystemRepresentation (dsym_url.get(), true, (UInt8*)path, sizeof(path)-1)) |
| { |
| out_dsym_fspec->SetFile(path, false); |
| |
| if (out_dsym_fspec->GetFileType () == FileSpec::eFileTypeDirectory) |
| { |
| *out_dsym_fspec = LocateDSYMMachFileInDSYMBundle (*out_dsym_fspec, uuid, arch); |
| if (*out_dsym_fspec) |
| ++items_found; |
| } |
| else |
| { |
| ++items_found; |
| } |
| } |
| } |
| |
| if (out_exec_fspec) |
| { |
| CFCReleaser<CFDictionaryRef> dict(::DBGCopyDSYMPropertyLists (dsym_url.get()));; |
| if (dict.get()) |
| { |
| CFStringRef exec_cf_path = static_cast<CFStringRef>(::CFDictionaryGetValue (dict.get(), CFSTR("DBGSymbolRichExecutable"))); |
| if (exec_cf_path && ::CFStringGetFileSystemRepresentation (exec_cf_path, path, sizeof(path))) |
| { |
| ++items_found; |
| out_dsym_fspec->SetFile(path, false); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| return items_found; |
| } |
| |
| static bool |
| LocateDSYMInVincinityOfExecutable (const FileSpec *exec_fspec, const ArchSpec* arch, const lldb_private::UUID *uuid, FileSpec &dsym_fspec) |
| { |
| if (exec_fspec) |
| { |
| char path[PATH_MAX]; |
| if (exec_fspec->GetPath(path, sizeof(path))) |
| { |
| // Make sure the module isn't already just a dSYM file... |
| if (strcasestr(path, ".dSYM/Contents/Resources/DWARF") == NULL) |
| { |
| size_t obj_file_path_length = strlen(path); |
| strncat(path, ".dSYM/Contents/Resources/DWARF/", sizeof(path)); |
| strncat(path, exec_fspec->GetFilename().AsCString(), sizeof(path)); |
| |
| dsym_fspec.SetFile(path, false); |
| |
| if (FileAtPathContainsArchAndUUID (dsym_fspec, arch, uuid)) |
| { |
| return true; |
| } |
| else |
| { |
| path[obj_file_path_length] = '\0'; |
| |
| char *last_dot = strrchr(path, '.'); |
| while (last_dot != NULL && last_dot[0]) |
| { |
| char *next_slash = strchr(last_dot, '/'); |
| if (next_slash != NULL) |
| { |
| *next_slash = '\0'; |
| strncat(path, ".dSYM/Contents/Resources/DWARF/", sizeof(path)); |
| strncat(path, exec_fspec->GetFilename().AsCString(), sizeof(path)); |
| dsym_fspec.SetFile(path, false); |
| if (dsym_fspec.Exists()) |
| return true; |
| else |
| { |
| *last_dot = '\0'; |
| char *prev_slash = strrchr(path, '/'); |
| if (prev_slash != NULL) |
| *prev_slash = '\0'; |
| else |
| break; |
| } |
| } |
| else |
| { |
| break; |
| } |
| } |
| } |
| } |
| } |
| } |
| dsym_fspec.Clear(); |
| return false; |
| } |
| |
| FileSpec |
| Symbols::LocateExecutableObjectFile (const FileSpec *exec_fspec, const ArchSpec* arch, const lldb_private::UUID *uuid) |
| { |
| Timer scoped_timer (__PRETTY_FUNCTION__, |
| "LocateExecutableObjectFile (file = %s, arch = %s, uuid = %p)", |
| exec_fspec ? exec_fspec->GetFilename().AsCString ("<NULL>") : "<NULL>", |
| arch ? arch->GetArchitectureName() : "<NULL>", |
| uuid); |
| |
| FileSpec objfile_fspec; |
| if (exec_fspec && FileAtPathContainsArchAndUUID (*exec_fspec, arch, uuid)) |
| objfile_fspec = *exec_fspec; |
| else |
| LocateMacOSXFilesUsingDebugSymbols (exec_fspec, arch, uuid, &objfile_fspec, NULL); |
| return objfile_fspec; |
| } |
| |
| FileSpec |
| Symbols::LocateExecutableSymbolFile (const FileSpec *exec_fspec, const ArchSpec* arch, const lldb_private::UUID *uuid) |
| { |
| Timer scoped_timer (__PRETTY_FUNCTION__, |
| "LocateExecutableSymbolFile (file = %s, arch = %s, uuid = %p)", |
| exec_fspec ? exec_fspec->GetFilename().AsCString ("<NULL>") : "<NULL>", |
| arch ? arch->GetArchitectureName() : "<NULL>", |
| uuid); |
| |
| FileSpec symbol_fspec; |
| // First try and find the dSYM in the same directory as the executable or in |
| // an appropriate parent directory |
| if (LocateDSYMInVincinityOfExecutable (exec_fspec, arch, uuid, symbol_fspec) == false) |
| { |
| // We failed to easily find the dSYM above, so use DebugSymbols |
| LocateMacOSXFilesUsingDebugSymbols (exec_fspec, arch, uuid, NULL, &symbol_fspec); |
| } |
| return symbol_fspec; |
| } |
