1 //===-- llvm-dwarfdump.cpp - Debug info dumping utility for llvm ----------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This program is a utility that works like "dwarfdump".
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "llvm/ADT/OwningPtr.h"
15 #include "llvm/ADT/STLExtras.h"
16 #include "llvm/ADT/Triple.h"
17 #include "llvm/DebugInfo/DIContext.h"
18 #include "llvm/Object/ObjectFile.h"
19 #include "llvm/Object/RelocVisitor.h"
20 #include "llvm/Support/CommandLine.h"
21 #include "llvm/Support/Debug.h"
22 #include "llvm/Support/Format.h"
23 #include "llvm/Support/ManagedStatic.h"
24 #include "llvm/Support/MemoryBuffer.h"
25 #include "llvm/Support/MemoryObject.h"
26 #include "llvm/Support/PrettyStackTrace.h"
27 #include "llvm/Support/Signals.h"
28 #include "llvm/Support/raw_ostream.h"
29 #include "llvm/Support/system_error.h"
30 #include <algorithm>
31 #include <cstring>
32 #include <list>
33 #include <string>
34
35 using namespace llvm;
36 using namespace object;
37
38 static cl::list<std::string>
39 InputFilenames(cl::Positional, cl::desc("<input object files>"),
40 cl::ZeroOrMore);
41
42 static cl::opt<unsigned long long>
43 Address("address", cl::init(-1ULL),
44 cl::desc("Print line information for a given address"));
45
46 static cl::opt<bool>
47 PrintFunctions("functions", cl::init(false),
48 cl::desc("Print function names as well as line information "
49 "for a given address"));
50
51 static cl::opt<bool>
52 PrintInlining("inlining", cl::init(false),
53 cl::desc("Print all inlined frames for a given address"));
54
55 static cl::opt<DIDumpType>
56 DumpType("debug-dump", cl::init(DIDT_All),
57 cl::desc("Dump of debug sections:"),
58 cl::values(
59 clEnumValN(DIDT_All, "all", "Dump all debug sections"),
60 clEnumValN(DIDT_Abbrev, "abbrev", ".debug_abbrev"),
61 clEnumValN(DIDT_AbbrevDwo, "abbrev.dwo", ".debug_abbrev.dwo"),
62 clEnumValN(DIDT_Aranges, "aranges", ".debug_aranges"),
63 clEnumValN(DIDT_Info, "info", ".debug_info"),
64 clEnumValN(DIDT_InfoDwo, "info.dwo", ".debug_info.dwo"),
65 clEnumValN(DIDT_Line, "line", ".debug_line"),
66 clEnumValN(DIDT_Loc, "loc", ".debug_loc"),
67 clEnumValN(DIDT_Frames, "frames", ".debug_frame"),
68 clEnumValN(DIDT_Ranges, "ranges", ".debug_ranges"),
69 clEnumValN(DIDT_Pubnames, "pubnames", ".debug_pubnames"),
70 clEnumValN(DIDT_Str, "str", ".debug_str"),
71 clEnumValN(DIDT_StrDwo, "str.dwo", ".debug_str.dwo"),
72 clEnumValN(DIDT_StrOffsetsDwo, "str_offsets.dwo", ".debug_str_offsets.dwo"),
73 clEnumValEnd));
74
PrintDILineInfo(DILineInfo dli)75 static void PrintDILineInfo(DILineInfo dli) {
76 if (PrintFunctions)
77 outs() << (dli.getFunctionName() ? dli.getFunctionName() : "<unknown>")
78 << "\n";
79 outs() << (dli.getFileName() ? dli.getFileName() : "<unknown>") << ':'
80 << dli.getLine() << ':' << dli.getColumn() << '\n';
81 }
82
DumpInput(const StringRef & Filename)83 static void DumpInput(const StringRef &Filename) {
84 OwningPtr<MemoryBuffer> Buff;
85
86 if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) {
87 errs() << Filename << ": " << ec.message() << "\n";
88 return;
89 }
90
91 OwningPtr<ObjectFile> Obj(ObjectFile::createObjectFile(Buff.take()));
92 if (!Obj) {
93 errs() << Filename << ": Unknown object file format\n";
94 return;
95 }
96
97 OwningPtr<DIContext> DICtx(DIContext::getDWARFContext(Obj.get()));
98
99 if (Address == -1ULL) {
100 outs() << Filename
101 << ":\tfile format " << Obj->getFileFormatName() << "\n\n";
102 // Dump the complete DWARF structure.
103 DICtx->dump(outs(), DumpType);
104 } else {
105 // Print line info for the specified address.
106 int SpecFlags = DILineInfoSpecifier::FileLineInfo |
107 DILineInfoSpecifier::AbsoluteFilePath;
108 if (PrintFunctions)
109 SpecFlags |= DILineInfoSpecifier::FunctionName;
110 if (PrintInlining) {
111 DIInliningInfo InliningInfo =
112 DICtx->getInliningInfoForAddress(Address, SpecFlags);
113 uint32_t n = InliningInfo.getNumberOfFrames();
114 if (n == 0) {
115 // Print one empty debug line info in any case.
116 PrintDILineInfo(DILineInfo());
117 } else {
118 for (uint32_t i = 0; i < n; i++) {
119 DILineInfo dli = InliningInfo.getFrame(i);
120 PrintDILineInfo(dli);
121 }
122 }
123 } else {
124 DILineInfo dli = DICtx->getLineInfoForAddress(Address, SpecFlags);
125 PrintDILineInfo(dli);
126 }
127 }
128 }
129
main(int argc,char ** argv)130 int main(int argc, char **argv) {
131 // Print a stack trace if we signal out.
132 sys::PrintStackTraceOnErrorSignal();
133 PrettyStackTraceProgram X(argc, argv);
134 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
135
136 cl::ParseCommandLineOptions(argc, argv, "llvm dwarf dumper\n");
137
138 // Defaults to a.out if no filenames specified.
139 if (InputFilenames.size() == 0)
140 InputFilenames.push_back("a.out");
141
142 std::for_each(InputFilenames.begin(), InputFilenames.end(), DumpInput);
143
144 return 0;
145 }
146