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_Frames, "frames", ".debug_frame"), 67 clEnumValN(DIDT_Ranges, "ranges", ".debug_ranges"), 68 clEnumValN(DIDT_Pubnames, "pubnames", ".debug_pubnames"), 69 clEnumValN(DIDT_Str, "str", ".debug_str"), 70 clEnumValN(DIDT_StrDwo, "str.dwo", ".debug_str.dwo"), 71 clEnumValN(DIDT_StrOffsetsDwo, "str_offsets.dwo", ".debug_str_offsets.dwo"), 72 clEnumValEnd)); 73 74 static void PrintDILineInfo(DILineInfo dli) { 75 if (PrintFunctions) 76 outs() << (dli.getFunctionName() ? dli.getFunctionName() : "<unknown>") 77 << "\n"; 78 outs() << (dli.getFileName() ? dli.getFileName() : "<unknown>") << ':' 79 << dli.getLine() << ':' << dli.getColumn() << '\n'; 80 } 81 82 static void DumpInput(const StringRef &Filename) { 83 OwningPtr<MemoryBuffer> Buff; 84 85 if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) { 86 errs() << Filename << ": " << ec.message() << "\n"; 87 return; 88 } 89 90 OwningPtr<ObjectFile> Obj(ObjectFile::createObjectFile(Buff.take())); 91 if (!Obj) { 92 errs() << Filename << ": Unknown object file format\n"; 93 return; 94 } 95 96 OwningPtr<DIContext> DICtx(DIContext::getDWARFContext(Obj.get())); 97 98 if (Address == -1ULL) { 99 outs() << Filename 100 << ":\tfile format " << Obj->getFileFormatName() << "\n\n"; 101 // Dump the complete DWARF structure. 102 DICtx->dump(outs(), DumpType); 103 } else { 104 // Print line info for the specified address. 105 int SpecFlags = DILineInfoSpecifier::FileLineInfo | 106 DILineInfoSpecifier::AbsoluteFilePath; 107 if (PrintFunctions) 108 SpecFlags |= DILineInfoSpecifier::FunctionName; 109 if (PrintInlining) { 110 DIInliningInfo InliningInfo = 111 DICtx->getInliningInfoForAddress(Address, SpecFlags); 112 uint32_t n = InliningInfo.getNumberOfFrames(); 113 if (n == 0) { 114 // Print one empty debug line info in any case. 115 PrintDILineInfo(DILineInfo()); 116 } else { 117 for (uint32_t i = 0; i < n; i++) { 118 DILineInfo dli = InliningInfo.getFrame(i); 119 PrintDILineInfo(dli); 120 } 121 } 122 } else { 123 DILineInfo dli = DICtx->getLineInfoForAddress(Address, SpecFlags); 124 PrintDILineInfo(dli); 125 } 126 } 127 } 128 129 int main(int argc, char **argv) { 130 // Print a stack trace if we signal out. 131 sys::PrintStackTraceOnErrorSignal(); 132 PrettyStackTraceProgram X(argc, argv); 133 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 134 135 cl::ParseCommandLineOptions(argc, argv, "llvm dwarf dumper\n"); 136 137 // Defaults to a.out if no filenames specified. 138 if (InputFilenames.size() == 0) 139 InputFilenames.push_back("a.out"); 140 141 std::for_each(InputFilenames.begin(), InputFilenames.end(), DumpInput); 142 143 return 0; 144 } 145