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71d94f8055
(instead of basenames) from DWARF. Use this behavior in llvm-dwarfdump tool. Reviewed by Benjamin Kramer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160496 91177308-0d34-0410-b5e6-96231b3b80d8
129 lines
4.4 KiB
C++
129 lines
4.4 KiB
C++
//===-- llvm-dwarfdump.cpp - Debug info dumping utility for llvm -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This program is a utility that works like "dwarfdump".
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/DebugInfo/DIContext.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/MemoryObject.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/system_error.h"
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#include <algorithm>
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#include <cstring>
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using namespace llvm;
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using namespace object;
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static cl::list<std::string>
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InputFilenames(cl::Positional, cl::desc("<input object files>"),
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cl::ZeroOrMore);
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static cl::opt<unsigned long long>
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Address("address", cl::init(-1ULL),
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cl::desc("Print line information for a given address"));
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static cl::opt<bool>
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PrintFunctions("functions", cl::init(false),
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cl::desc("Print function names as well as line information "
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"for a given address"));
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static void DumpInput(const StringRef &Filename) {
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OwningPtr<MemoryBuffer> Buff;
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if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) {
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errs() << Filename << ": " << ec.message() << "\n";
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return;
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}
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OwningPtr<ObjectFile> Obj(ObjectFile::createObjectFile(Buff.take()));
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StringRef DebugInfoSection;
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StringRef DebugAbbrevSection;
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StringRef DebugLineSection;
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StringRef DebugArangesSection;
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StringRef DebugStringSection;
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error_code ec;
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for (section_iterator i = Obj->begin_sections(),
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e = Obj->end_sections();
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i != e; i.increment(ec)) {
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StringRef name;
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i->getName(name);
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StringRef data;
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i->getContents(data);
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if (name.startswith("__DWARF,"))
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name = name.substr(8); // Skip "__DWARF," prefix.
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name = name.substr(name.find_first_not_of("._")); // Skip . and _ prefixes.
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if (name == "debug_info")
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DebugInfoSection = data;
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else if (name == "debug_abbrev")
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DebugAbbrevSection = data;
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else if (name == "debug_line")
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DebugLineSection = data;
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else if (name == "debug_aranges")
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DebugArangesSection = data;
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else if (name == "debug_str")
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DebugStringSection = data;
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}
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OwningPtr<DIContext> dictx(DIContext::getDWARFContext(/*FIXME*/true,
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DebugInfoSection,
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DebugAbbrevSection,
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DebugArangesSection,
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DebugLineSection,
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DebugStringSection));
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if (Address == -1ULL) {
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outs() << Filename
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<< ":\tfile format " << Obj->getFileFormatName() << "\n\n";
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// Dump the complete DWARF structure.
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dictx->dump(outs());
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} else {
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// Print line info for the specified address.
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int spec_flags = DILineInfoSpecifier::FileLineInfo |
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DILineInfoSpecifier::AbsoluteFilePath;
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if (PrintFunctions)
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spec_flags |= DILineInfoSpecifier::FunctionName;
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DILineInfo dli = dictx->getLineInfoForAddress(Address, spec_flags);
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if (PrintFunctions)
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outs() << (dli.getFunctionName() ? dli.getFunctionName() : "<unknown>")
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<< "\n";
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outs() << (dli.getFileName() ? dli.getFileName() : "<unknown>") << ':'
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<< dli.getLine() << ':' << dli.getColumn() << '\n';
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}
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}
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int main(int argc, char **argv) {
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// Print a stack trace if we signal out.
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sys::PrintStackTraceOnErrorSignal();
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PrettyStackTraceProgram X(argc, argv);
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llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
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cl::ParseCommandLineOptions(argc, argv, "llvm dwarf dumper\n");
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// Defaults to a.out if no filenames specified.
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if (InputFilenames.size() == 0)
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InputFilenames.push_back("a.out");
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std::for_each(InputFilenames.begin(), InputFilenames.end(), DumpInput);
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return 0;
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}
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