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/ArchSpec.h"
12 #include "lldb/Core/Module.h"
13 #include "lldb/Core/ModuleSpec.h"
14 #include "lldb/Core/Timer.h"
15 #include "lldb/Symbol/ObjectFile.h"
16 #include "lldb/Target/Target.h"
17 #include "lldb/Utility/DataBuffer.h"
18 #include "lldb/Utility/DataExtractor.h"
19 #include "lldb/Utility/Log.h"
20 #include "lldb/Utility/SafeMachO.h"
21 #include "lldb/Utility/StreamString.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);
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, stripping
113 // off components. e.g. we may have a binary like
114 // /S/L/F/Foundation.framework/Versions/A/Foundation
116 // /S/L/F/Foundation.framework.dSYM
118 // so we'll need to start with /S/L/F/Foundation.framework/Versions/A,
119 // add the .dSYM part to the "A", and if that doesn't exist, strip off
120 // the "A" and try it again with "Versions", etc., until we find a dSYM
121 // bundle or we've stripped off enough path components that there's no
124 for (int i = 0; i < 4; i++) {
125 // Does this part of the path have a "." character - could it be a bundle's
126 // 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 if
135 // "Foundation.framework.dSYM/Contents/Resources/DWARF/Foundation"
136 // exists & has the right uuid.
137 std::string dsym_fn = fn;
139 dsym_fspec.AppendPathComponent(dsym_fn.c_str());
140 dsym_fspec.AppendPathComponent("Contents");
141 dsym_fspec.AppendPathComponent("Resources");
142 dsym_fspec.AppendPathComponent("DWARF");
143 dsym_fspec.AppendPathComponent(exec_fspec->GetFilename().AsCString());
144 if (dsym_fspec.Exists() &&
145 FileAtPathContainsArchAndUUID(
146 dsym_fspec, module_spec.GetArchitecturePtr(),
147 module_spec.GetUUIDPtr())) {
149 log->Printf("dSYM with matching UUID & arch found at %s",
150 dsym_fspec.GetPath().c_str());
155 parent_dirs.RemoveLastPathComponent();
165 FileSpec LocateExecutableSymbolFileDsym(const ModuleSpec &module_spec) {
166 const FileSpec *exec_fspec = module_spec.GetFileSpecPtr();
167 const ArchSpec *arch = module_spec.GetArchitecturePtr();
168 const UUID *uuid = module_spec.GetUUIDPtr();
170 static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
173 "LocateExecutableSymbolFileDsym (file = %s, arch = %s, uuid = %p)",
174 exec_fspec ? exec_fspec->GetFilename().AsCString("<NULL>") : "<NULL>",
175 arch ? arch->GetArchitectureName() : "<NULL>", (const void *)uuid);
177 FileSpec symbol_fspec;
178 ModuleSpec dsym_module_spec;
179 // First try and find the dSYM in the same directory as the executable or in
180 // an appropriate parent directory
181 if (LocateDSYMInVincinityOfExecutable(module_spec, symbol_fspec) == false) {
182 // We failed to easily find the dSYM above, so use DebugSymbols
183 LocateMacOSXFilesUsingDebugSymbols(module_spec, dsym_module_spec);
185 dsym_module_spec.GetSymbolFileSpec() = symbol_fspec;
187 return dsym_module_spec.GetSymbolFileSpec();
190 ModuleSpec Symbols::LocateExecutableObjectFile(const ModuleSpec &module_spec) {
192 const FileSpec *exec_fspec = module_spec.GetFileSpecPtr();
193 const ArchSpec *arch = module_spec.GetArchitecturePtr();
194 const UUID *uuid = module_spec.GetUUIDPtr();
195 static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
197 func_cat, "LocateExecutableObjectFile (file = %s, arch = %s, uuid = %p)",
198 exec_fspec ? exec_fspec->GetFilename().AsCString("<NULL>") : "<NULL>",
199 arch ? arch->GetArchitectureName() : "<NULL>", (const void *)uuid);
201 ModuleSpecList module_specs;
202 ModuleSpec matched_module_spec;
204 ObjectFile::GetModuleSpecifications(*exec_fspec, 0, 0, module_specs) &&
205 module_specs.FindMatchingModuleSpec(module_spec, matched_module_spec)) {
206 result.GetFileSpec() = exec_fspec;
208 LocateMacOSXFilesUsingDebugSymbols(module_spec, result);
213 FileSpec Symbols::LocateExecutableSymbolFile(const ModuleSpec &module_spec) {
214 FileSpec symbol_file_spec = module_spec.GetSymbolFileSpec();
215 if (symbol_file_spec.IsAbsolute() && symbol_file_spec.Exists())
216 return symbol_file_spec;
218 const char *symbol_filename = symbol_file_spec.GetFilename().AsCString();
219 if (symbol_filename && symbol_filename[0]) {
220 FileSpecList debug_file_search_paths(
221 Target::GetDefaultDebugFileSearchPaths());
223 // Add module directory.
224 const ConstString &file_dir = module_spec.GetFileSpec().GetDirectory();
225 debug_file_search_paths.AppendIfUnique(
226 FileSpec(file_dir.AsCString("."), true));
228 // Add current working directory.
229 debug_file_search_paths.AppendIfUnique(FileSpec(".", true));
231 #ifndef LLVM_ON_WIN32
232 #if defined(__NetBSD__)
233 // Add /usr/libdata/debug directory.
234 debug_file_search_paths.AppendIfUnique(FileSpec("/usr/libdata/debug", true));
236 // Add /usr/lib/debug directory.
237 debug_file_search_paths.AppendIfUnique(FileSpec("/usr/lib/debug", true));
239 #endif // LLVM_ON_WIN32
241 std::string uuid_str;
242 const UUID &module_uuid = module_spec.GetUUID();
243 if (module_uuid.IsValid()) {
244 // Some debug files are stored in the .build-id directory like this:
245 // /usr/lib/debug/.build-id/ff/e7fe727889ad82bb153de2ad065b2189693315.debug
246 uuid_str = module_uuid.GetAsString("");
247 uuid_str.insert(2, 1, '/');
248 uuid_str = uuid_str + ".debug";
251 size_t num_directories = debug_file_search_paths.GetSize();
252 for (size_t idx = 0; idx < num_directories; ++idx) {
253 FileSpec dirspec = debug_file_search_paths.GetFileSpecAtIndex(idx);
254 dirspec.ResolvePath();
255 if (!llvm::sys::fs::is_directory(dirspec.GetPath()))
258 std::vector<std::string> files;
259 std::string dirname = dirspec.GetPath();
261 files.push_back(dirname + "/" + symbol_filename);
262 files.push_back(dirname + "/.debug/" + symbol_filename);
263 files.push_back(dirname + "/.build-id/" + uuid_str);
265 // Some debug files may stored in the module directory like this:
266 // /usr/lib/debug/usr/lib/library.so.debug
267 if (!file_dir.IsEmpty())
268 files.push_back(dirname + file_dir.AsCString() + "/" + symbol_filename);
270 const uint32_t num_files = files.size();
271 for (size_t idx_file = 0; idx_file < num_files; ++idx_file) {
272 const std::string &filename = files[idx_file];
273 FileSpec file_spec(filename, true);
275 if (llvm::sys::fs::equivalent(file_spec.GetPath(),
276 module_spec.GetFileSpec().GetPath()))
279 if (file_spec.Exists()) {
280 lldb_private::ModuleSpecList specs;
281 const size_t num_specs =
282 ObjectFile::GetModuleSpecifications(file_spec, 0, 0, specs);
283 assert(num_specs <= 1 &&
284 "Symbol Vendor supports only a single architecture");
285 if (num_specs == 1) {
287 if (specs.GetModuleSpecAtIndex(0, mspec)) {
288 if (mspec.GetUUID() == module_uuid)
297 return LocateExecutableSymbolFileDsym(module_spec);
300 #if !defined(__APPLE__)
302 FileSpec Symbols::FindSymbolFileInBundle(const FileSpec &symfile_bundle,
303 const lldb_private::UUID *uuid,
304 const ArchSpec *arch) {
309 bool Symbols::DownloadObjectAndSymbolFile(ModuleSpec &module_spec,
311 // Fill in the module_spec.GetFileSpec() for the object file and/or the
312 // module_spec.GetSymbolFileSpec() for the debug symbols file.