1 //===-- llvm-dwarfdump.cpp - Debug info dumping utility for llvm ----------===//
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 // This program is a utility that works like "dwarfdump".
12 //===----------------------------------------------------------------------===//
14 #include "llvm/ADT/STLExtras.h"
15 #include "llvm/ADT/Triple.h"
16 #include "llvm/DebugInfo/DIContext.h"
17 #include "llvm/DebugInfo/DWARF/DWARFContext.h"
18 #include "llvm/Object/MachOUniversal.h"
19 #include "llvm/Object/ObjectFile.h"
20 #include "llvm/Object/RelocVisitor.h"
21 #include "llvm/Support/CommandLine.h"
22 #include "llvm/Support/Debug.h"
23 #include "llvm/Support/Format.h"
24 #include "llvm/Support/ManagedStatic.h"
25 #include "llvm/Support/MemoryBuffer.h"
26 #include "llvm/Support/Path.h"
27 #include "llvm/Support/PrettyStackTrace.h"
28 #include "llvm/Support/Signals.h"
29 #include "llvm/Support/raw_ostream.h"
33 #include <system_error>
36 using namespace object;
38 static cl::list<std::string>
39 InputFilenames(cl::Positional, cl::desc("<input object files or .dSYM bundles>"),
42 static cl::opt<DIDumpType> DumpType(
43 "debug-dump", cl::init(DIDT_All), cl::desc("Dump of debug sections:"),
45 clEnumValN(DIDT_All, "all", "Dump all debug sections"),
46 clEnumValN(DIDT_Abbrev, "abbrev", ".debug_abbrev"),
47 clEnumValN(DIDT_AbbrevDwo, "abbrev.dwo", ".debug_abbrev.dwo"),
48 clEnumValN(DIDT_AppleNames, "apple_names", ".apple_names"),
49 clEnumValN(DIDT_AppleTypes, "apple_types", ".apple_types"),
50 clEnumValN(DIDT_AppleNamespaces, "apple_namespaces",
52 clEnumValN(DIDT_AppleObjC, "apple_objc", ".apple_objc"),
53 clEnumValN(DIDT_Aranges, "aranges", ".debug_aranges"),
54 clEnumValN(DIDT_Info, "info", ".debug_info"),
55 clEnumValN(DIDT_InfoDwo, "info.dwo", ".debug_info.dwo"),
56 clEnumValN(DIDT_Types, "types", ".debug_types"),
57 clEnumValN(DIDT_TypesDwo, "types.dwo", ".debug_types.dwo"),
58 clEnumValN(DIDT_Line, "line", ".debug_line"),
59 clEnumValN(DIDT_LineDwo, "line.dwo", ".debug_line.dwo"),
60 clEnumValN(DIDT_Loc, "loc", ".debug_loc"),
61 clEnumValN(DIDT_LocDwo, "loc.dwo", ".debug_loc.dwo"),
62 clEnumValN(DIDT_Frames, "frames", ".debug_frame"),
63 clEnumValN(DIDT_Macro, "macro", ".debug_macinfo"),
64 clEnumValN(DIDT_Ranges, "ranges", ".debug_ranges"),
65 clEnumValN(DIDT_Pubnames, "pubnames", ".debug_pubnames"),
66 clEnumValN(DIDT_Pubtypes, "pubtypes", ".debug_pubtypes"),
67 clEnumValN(DIDT_GnuPubnames, "gnu_pubnames", ".debug_gnu_pubnames"),
68 clEnumValN(DIDT_GnuPubtypes, "gnu_pubtypes", ".debug_gnu_pubtypes"),
69 clEnumValN(DIDT_Str, "str", ".debug_str"),
70 clEnumValN(DIDT_StrOffsets, "str_offsets", ".debug_str_offsets"),
71 clEnumValN(DIDT_StrDwo, "str.dwo", ".debug_str.dwo"),
72 clEnumValN(DIDT_StrOffsetsDwo, "str_offsets.dwo",
73 ".debug_str_offsets.dwo"),
74 clEnumValN(DIDT_CUIndex, "cu_index", ".debug_cu_index"),
75 clEnumValN(DIDT_GdbIndex, "gdb_index", ".gdb_index"),
76 clEnumValN(DIDT_TUIndex, "tu_index", ".debug_tu_index")));
79 SummarizeTypes("summarize-types",
80 cl::desc("Abbreviate the description of type unit entries"));
82 static cl::opt<bool> Verify("verify", cl::desc("Verify the DWARF debug info"));
84 static cl::opt<bool> Quiet("quiet",
85 cl::desc("Use with -verify to not emit to STDOUT."));
87 static cl::opt<bool> Brief("brief", cl::desc("Print fewer low-level details"));
89 static void error(StringRef Filename, std::error_code EC) {
92 errs() << Filename << ": " << EC.message() << "\n";
96 static void DumpObjectFile(ObjectFile &Obj, Twine Filename) {
97 std::unique_ptr<DIContext> DICtx(new DWARFContextInMemory(Obj));
99 outs() << Filename.str() << ":\tfile format " << Obj.getFileFormatName()
103 // Dump the complete DWARF structure.
104 DIDumpOptions DumpOpts;
105 DumpOpts.DumpType = DumpType;
106 DumpOpts.SummarizeTypes = SummarizeTypes;
107 DumpOpts.Brief = Brief;
108 DICtx->dump(outs(), DumpOpts);
111 static void DumpInput(StringRef Filename) {
112 ErrorOr<std::unique_ptr<MemoryBuffer>> BuffOrErr =
113 MemoryBuffer::getFileOrSTDIN(Filename);
114 error(Filename, BuffOrErr.getError());
115 std::unique_ptr<MemoryBuffer> Buff = std::move(BuffOrErr.get());
117 Expected<std::unique_ptr<Binary>> BinOrErr =
118 object::createBinary(Buff->getMemBufferRef());
120 error(Filename, errorToErrorCode(BinOrErr.takeError()));
122 if (auto *Obj = dyn_cast<ObjectFile>(BinOrErr->get()))
123 DumpObjectFile(*Obj, Filename);
124 else if (auto *Fat = dyn_cast<MachOUniversalBinary>(BinOrErr->get()))
125 for (auto &ObjForArch : Fat->objects()) {
126 auto MachOOrErr = ObjForArch.getAsObjectFile();
127 error(Filename, errorToErrorCode(MachOOrErr.takeError()));
128 DumpObjectFile(**MachOOrErr,
129 Filename + " (" + ObjForArch.getArchFlagName() + ")");
133 static bool VerifyObjectFile(ObjectFile &Obj, Twine Filename) {
134 std::unique_ptr<DIContext> DICtx(new DWARFContextInMemory(Obj));
136 // Verify the DWARF and exit with non-zero exit status if verification
138 raw_ostream &stream = Quiet ? nulls() : outs();
139 stream << "Verifying " << Filename.str() << ":\tfile format "
140 << Obj.getFileFormatName() << "\n";
141 bool Result = DICtx->verify(stream, DumpType);
143 stream << "No errors.\n";
145 stream << "Errors detected.\n";
149 static bool VerifyInput(StringRef Filename) {
150 ErrorOr<std::unique_ptr<MemoryBuffer>> BuffOrErr =
151 MemoryBuffer::getFileOrSTDIN(Filename);
152 error(Filename, BuffOrErr.getError());
153 std::unique_ptr<MemoryBuffer> Buff = std::move(BuffOrErr.get());
155 Expected<std::unique_ptr<Binary>> BinOrErr =
156 object::createBinary(Buff->getMemBufferRef());
158 error(Filename, errorToErrorCode(BinOrErr.takeError()));
161 if (auto *Obj = dyn_cast<ObjectFile>(BinOrErr->get()))
162 Result = VerifyObjectFile(*Obj, Filename);
163 else if (auto *Fat = dyn_cast<MachOUniversalBinary>(BinOrErr->get()))
164 for (auto &ObjForArch : Fat->objects()) {
165 auto MachOOrErr = ObjForArch.getAsObjectFile();
166 error(Filename, errorToErrorCode(MachOOrErr.takeError()));
167 if (!VerifyObjectFile(**MachOOrErr, Filename + " (" + ObjForArch.getArchFlagName() + ")"))
173 /// If the input path is a .dSYM bundle (as created by the dsymutil tool),
174 /// replace it with individual entries for each of the object files inside the
175 /// bundle otherwise return the input path.
176 static std::vector<std::string> expandBundle(const std::string &InputPath) {
177 std::vector<std::string> BundlePaths;
178 SmallString<256> BundlePath(InputPath);
179 // Manually open up the bundle to avoid introducing additional dependencies.
180 if (sys::fs::is_directory(BundlePath) &&
181 sys::path::extension(BundlePath) == ".dSYM") {
183 sys::path::append(BundlePath, "Contents", "Resources", "DWARF");
184 for (sys::fs::directory_iterator Dir(BundlePath, EC), DirEnd;
185 Dir != DirEnd && !EC; Dir.increment(EC)) {
186 const std::string &Path = Dir->path();
187 sys::fs::file_status Status;
188 EC = sys::fs::status(Path, Status);
190 switch (Status.type()) {
191 case sys::fs::file_type::regular_file:
192 case sys::fs::file_type::symlink_file:
193 case sys::fs::file_type::type_unknown:
194 BundlePaths.push_back(Path);
199 error(BundlePath, EC);
201 if (!BundlePaths.size())
202 BundlePaths.push_back(InputPath);
206 int main(int argc, char **argv) {
207 // Print a stack trace if we signal out.
208 sys::PrintStackTraceOnErrorSignal(argv[0]);
209 PrettyStackTraceProgram X(argc, argv);
210 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
212 cl::ParseCommandLineOptions(argc, argv, "llvm dwarf dumper\n");
214 // Defaults to a.out if no filenames specified.
215 if (InputFilenames.size() == 0)
216 InputFilenames.push_back("a.out");
218 // Expand any .dSYM bundles to the individual object files contained therein.
219 std::vector<std::string> Objects;
220 for (const auto &F : InputFilenames) {
221 auto Objs = expandBundle(F);
222 Objects.insert(Objects.end(), Objs.begin(), Objs.end());
226 // If we encountered errors during verify, exit with a non-zero exit status.
227 if (!std::all_of(Objects.begin(), Objects.end(), VerifyInput))
230 std::for_each(Objects.begin(), Objects.end(), DumpInput);