1 //===-- Symbols.cpp ---------------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "lldb/Host/Symbols.h"
11 #include "lldb/Core/ModuleSpec.h"
12 #include "lldb/Host/FileSystem.h"
13 #include "lldb/Symbol/ObjectFile.h"
14 #include "lldb/Target/Target.h"
15 #include "lldb/Utility/ArchSpec.h"
16 #include "lldb/Utility/DataBuffer.h"
17 #include "lldb/Utility/DataExtractor.h"
18 #include "lldb/Utility/Log.h"
19 #include "lldb/Utility/SafeMachO.h"
20 #include "lldb/Utility/StreamString.h"
21 #include "lldb/Utility/Timer.h"
22 #include "lldb/Utility/UUID.h"
24 #include "llvm/Support/FileSystem.h"
26 // From MacOSX system header "mach/machine.h"
27 typedef int cpu_type_t;
28 typedef int cpu_subtype_t;
31 using namespace lldb_private;
32 using namespace llvm::MachO;
34 #if defined(__APPLE__)
36 // Forward declaration of method defined in source/Host/macosx/Symbols.cpp
37 int LocateMacOSXFilesUsingDebugSymbols(const ModuleSpec &module_spec,
38 ModuleSpec &return_module_spec);
42 int LocateMacOSXFilesUsingDebugSymbols(const ModuleSpec &module_spec,
43 ModuleSpec &return_module_spec) {
44 // Cannot find MacOSX files using debug symbols on non MacOSX.
50 static bool FileAtPathContainsArchAndUUID(const FileSpec &file_fspec,
52 const lldb_private::UUID *uuid) {
53 ModuleSpecList module_specs;
54 if (ObjectFile::GetModuleSpecifications(file_fspec, 0, 0, module_specs)) {
56 for (size_t i = 0; i < module_specs.GetSize(); ++i) {
57 bool got_spec = module_specs.GetModuleSpecAtIndex(i, spec);
58 UNUSED_IF_ASSERT_DISABLED(got_spec);
60 if ((uuid == NULL || (spec.GetUUIDPtr() && spec.GetUUID() == *uuid)) &&
61 (arch == NULL || (spec.GetArchitecturePtr() &&
62 spec.GetArchitecture().IsCompatibleMatch(*arch)))) {
70 static bool LocateDSYMInVincinityOfExecutable(const ModuleSpec &module_spec,
71 FileSpec &dsym_fspec) {
72 Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_HOST);
73 const FileSpec *exec_fspec = module_spec.GetFileSpecPtr();
76 if (exec_fspec->GetPath(path, sizeof(path))) {
77 // Make sure the module isn't already just a dSYM file...
78 if (strcasestr(path, ".dSYM/Contents/Resources/DWARF") == NULL) {
80 if (module_spec.GetUUIDPtr() && module_spec.GetUUIDPtr()->IsValid()) {
82 "Searching for dSYM bundle next to executable %s, UUID %s",
83 path, module_spec.GetUUIDPtr()->GetAsString().c_str());
85 log->Printf("Searching for dSYM bundle next to executable %s",
89 ::strncat(path, ".dSYM/Contents/Resources/DWARF/",
90 sizeof(path) - strlen(path) - 1);
91 ::strncat(path, exec_fspec->GetFilename().AsCString(),
92 sizeof(path) - strlen(path) - 1);
94 dsym_fspec.SetFile(path, false, FileSpec::Style::native);
96 ModuleSpecList module_specs;
97 ModuleSpec matched_module_spec;
98 if (dsym_fspec.Exists() &&
99 FileAtPathContainsArchAndUUID(dsym_fspec,
100 module_spec.GetArchitecturePtr(),
101 module_spec.GetUUIDPtr())) {
103 log->Printf("dSYM with matching UUID & arch found at %s", path);
107 FileSpec parent_dirs = exec_fspec;
109 // Remove the binary name from the FileSpec
110 parent_dirs.RemoveLastPathComponent();
112 // Add a ".dSYM" name to each directory component of the path,
113 // stripping off components. e.g. we may have a binary like
114 // /S/L/F/Foundation.framework/Versions/A/Foundation and
115 // /S/L/F/Foundation.framework.dSYM
117 // so we'll need to start with
118 // /S/L/F/Foundation.framework/Versions/A, add the .dSYM part to the
119 // "A", and if that doesn't exist, strip off the "A" and try it again
120 // with "Versions", etc., until we find a dSYM bundle or we've
121 // stripped off enough path components that there's no need to
124 for (int i = 0; i < 4; i++) {
125 // Does this part of the path have a "." character - could it be a
126 // bundle's top level directory?
127 const char *fn = parent_dirs.GetFilename().AsCString();
130 if (::strchr(fn, '.') != nullptr) {
131 dsym_fspec = parent_dirs;
132 dsym_fspec.RemoveLastPathComponent();
134 // If the current directory name is "Foundation.framework", see
136 // "Foundation.framework.dSYM/Contents/Resources/DWARF/Foundation"
137 // exists & has the right uuid.
138 std::string dsym_fn = fn;
140 dsym_fspec.AppendPathComponent(dsym_fn.c_str());
141 dsym_fspec.AppendPathComponent("Contents");
142 dsym_fspec.AppendPathComponent("Resources");
143 dsym_fspec.AppendPathComponent("DWARF");
144 dsym_fspec.AppendPathComponent(
145 exec_fspec->GetFilename().AsCString());
146 if (dsym_fspec.Exists() &&
147 FileAtPathContainsArchAndUUID(
148 dsym_fspec, module_spec.GetArchitecturePtr(),
149 module_spec.GetUUIDPtr())) {
151 log->Printf("dSYM with matching UUID & arch found at %s",
152 dsym_fspec.GetPath().c_str());
157 parent_dirs.RemoveLastPathComponent();
167 FileSpec LocateExecutableSymbolFileDsym(const ModuleSpec &module_spec) {
168 const FileSpec *exec_fspec = module_spec.GetFileSpecPtr();
169 const ArchSpec *arch = module_spec.GetArchitecturePtr();
170 const UUID *uuid = module_spec.GetUUIDPtr();
172 static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
175 "LocateExecutableSymbolFileDsym (file = %s, arch = %s, uuid = %p)",
176 exec_fspec ? exec_fspec->GetFilename().AsCString("<NULL>") : "<NULL>",
177 arch ? arch->GetArchitectureName() : "<NULL>", (const void *)uuid);
179 FileSpec symbol_fspec;
180 ModuleSpec dsym_module_spec;
181 // First try and find the dSYM in the same directory as the executable or in
182 // an appropriate parent directory
183 if (LocateDSYMInVincinityOfExecutable(module_spec, symbol_fspec) == false) {
184 // We failed to easily find the dSYM above, so use DebugSymbols
185 LocateMacOSXFilesUsingDebugSymbols(module_spec, dsym_module_spec);
187 dsym_module_spec.GetSymbolFileSpec() = symbol_fspec;
189 return dsym_module_spec.GetSymbolFileSpec();
192 ModuleSpec Symbols::LocateExecutableObjectFile(const ModuleSpec &module_spec) {
194 const FileSpec *exec_fspec = module_spec.GetFileSpecPtr();
195 const ArchSpec *arch = module_spec.GetArchitecturePtr();
196 const UUID *uuid = module_spec.GetUUIDPtr();
197 static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
199 func_cat, "LocateExecutableObjectFile (file = %s, arch = %s, uuid = %p)",
200 exec_fspec ? exec_fspec->GetFilename().AsCString("<NULL>") : "<NULL>",
201 arch ? arch->GetArchitectureName() : "<NULL>", (const void *)uuid);
203 ModuleSpecList module_specs;
204 ModuleSpec matched_module_spec;
206 ObjectFile::GetModuleSpecifications(*exec_fspec, 0, 0, module_specs) &&
207 module_specs.FindMatchingModuleSpec(module_spec, matched_module_spec)) {
208 result.GetFileSpec() = exec_fspec;
210 LocateMacOSXFilesUsingDebugSymbols(module_spec, result);
215 FileSpec Symbols::LocateExecutableSymbolFile(const ModuleSpec &module_spec) {
216 FileSpec symbol_file_spec = module_spec.GetSymbolFileSpec();
217 if (symbol_file_spec.IsAbsolute() && symbol_file_spec.Exists())
218 return symbol_file_spec;
220 const char *symbol_filename = symbol_file_spec.GetFilename().AsCString();
221 if (symbol_filename && symbol_filename[0]) {
222 FileSpecList debug_file_search_paths(
223 Target::GetDefaultDebugFileSearchPaths());
225 // Add module directory.
226 FileSpec module_file_spec = module_spec.GetFileSpec();
227 // We keep the unresolved pathname if it fails.
228 FileSystem::ResolveSymbolicLink(module_file_spec, module_file_spec);
230 const ConstString &file_dir = module_file_spec.GetDirectory();
231 debug_file_search_paths.AppendIfUnique(
232 FileSpec(file_dir.AsCString("."), true));
234 // Add current working directory.
235 debug_file_search_paths.AppendIfUnique(FileSpec(".", true));
238 #if defined(__NetBSD__)
239 // Add /usr/libdata/debug directory.
240 debug_file_search_paths.AppendIfUnique(
241 FileSpec("/usr/libdata/debug", true));
243 // Add /usr/lib/debug directory.
244 debug_file_search_paths.AppendIfUnique(FileSpec("/usr/lib/debug", true));
248 std::string uuid_str;
249 const UUID &module_uuid = module_spec.GetUUID();
250 if (module_uuid.IsValid()) {
251 // Some debug files are stored in the .build-id directory like this:
252 // /usr/lib/debug/.build-id/ff/e7fe727889ad82bb153de2ad065b2189693315.debug
253 uuid_str = module_uuid.GetAsString("");
254 std::transform(uuid_str.begin(), uuid_str.end(), uuid_str.begin(),
256 uuid_str.insert(2, 1, '/');
257 uuid_str = uuid_str + ".debug";
260 size_t num_directories = debug_file_search_paths.GetSize();
261 for (size_t idx = 0; idx < num_directories; ++idx) {
262 FileSpec dirspec = debug_file_search_paths.GetFileSpecAtIndex(idx);
263 dirspec.ResolvePath();
264 if (!llvm::sys::fs::is_directory(dirspec.GetPath()))
267 std::vector<std::string> files;
268 std::string dirname = dirspec.GetPath();
270 files.push_back(dirname + "/" + symbol_filename);
271 files.push_back(dirname + "/.debug/" + symbol_filename);
272 files.push_back(dirname + "/.build-id/" + uuid_str);
274 // Some debug files may stored in the module directory like this:
275 // /usr/lib/debug/usr/lib/library.so.debug
276 if (!file_dir.IsEmpty())
277 files.push_back(dirname + file_dir.AsCString() + "/" + symbol_filename);
279 const uint32_t num_files = files.size();
280 for (size_t idx_file = 0; idx_file < num_files; ++idx_file) {
281 const std::string &filename = files[idx_file];
282 FileSpec file_spec(filename, true);
284 if (llvm::sys::fs::equivalent(file_spec.GetPath(),
285 module_file_spec.GetPath()))
288 if (file_spec.Exists()) {
289 lldb_private::ModuleSpecList specs;
290 const size_t num_specs =
291 ObjectFile::GetModuleSpecifications(file_spec, 0, 0, specs);
292 assert(num_specs <= 1 &&
293 "Symbol Vendor supports only a single architecture");
294 if (num_specs == 1) {
296 if (specs.GetModuleSpecAtIndex(0, mspec)) {
297 // Skip the uuids check if module_uuid is invalid. For example,
298 // this happens for *.dwp files since at the moment llvm-dwp
299 // doesn't output build ids, nor does binutils dwp.
300 if (!module_uuid.IsValid() || module_uuid == mspec.GetUUID())
309 return LocateExecutableSymbolFileDsym(module_spec);
312 #if !defined(__APPLE__)
314 FileSpec Symbols::FindSymbolFileInBundle(const FileSpec &symfile_bundle,
315 const lldb_private::UUID *uuid,
316 const ArchSpec *arch) {
321 bool Symbols::DownloadObjectAndSymbolFile(ModuleSpec &module_spec,
323 // Fill in the module_spec.GetFileSpec() for the object file and/or the
324 // module_spec.GetSymbolFileSpec() for the debug symbols file.