504 lines
18 KiB
C++
504 lines
18 KiB
C++
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//===-- gsymutil.cpp - GSYM dumping and creation 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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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringSet.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/DebugInfo/DIContext.h"
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#include "llvm/DebugInfo/DWARF/DWARFContext.h"
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#include "llvm/Object/Archive.h"
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#include "llvm/Object/ELFObjectFile.h"
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#include "llvm/Object/MachOUniversal.h"
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#include "llvm/Object/ObjectFile.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/Path.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Regex.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cstring>
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#include <inttypes.h>
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#include <map>
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#include <string>
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#include <system_error>
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#include <vector>
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#include "llvm/DebugInfo/GSYM/DwarfTransformer.h"
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#include "llvm/DebugInfo/GSYM/FunctionInfo.h"
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#include "llvm/DebugInfo/GSYM/GsymCreator.h"
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#include "llvm/DebugInfo/GSYM/GsymReader.h"
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#include "llvm/DebugInfo/GSYM/InlineInfo.h"
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#include "llvm/DebugInfo/GSYM/LookupResult.h"
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#include "llvm/DebugInfo/GSYM/ObjectFileTransformer.h"
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using namespace llvm;
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using namespace gsym;
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using namespace object;
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/// @}
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/// Command line options.
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/// @{
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namespace {
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using namespace cl;
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OptionCategory GeneralOptions("Options");
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OptionCategory ConversionOptions("Conversion Options");
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OptionCategory LookupOptions("Lookup Options");
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static opt<bool> Help("h", desc("Alias for -help"), Hidden,
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cat(GeneralOptions));
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static opt<bool> Verbose("verbose",
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desc("Enable verbose logging and encoding details."),
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cat(GeneralOptions));
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static list<std::string> InputFilenames(Positional, desc("<input GSYM files>"),
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ZeroOrMore, cat(GeneralOptions));
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static opt<std::string>
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ConvertFilename("convert", cl::init(""),
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cl::desc("Convert the specified file to the GSYM format.\n"
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"Supported files include ELF and mach-o files "
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"that will have their debug info (DWARF) and "
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"symbol table converted."),
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cl::value_desc("path"), cat(ConversionOptions));
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static list<std::string>
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ArchFilters("arch",
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desc("Process debug information for the specified CPU "
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"architecture only.\nArchitectures may be specified by "
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"name or by number.\nThis option can be specified "
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"multiple times, once for each desired architecture."),
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cl::value_desc("arch"), cat(ConversionOptions));
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static opt<std::string>
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OutputFilename("out-file", cl::init(""),
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cl::desc("Specify the path where the converted GSYM file "
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"will be saved.\nWhen not specified, a '.gsym' "
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"extension will be appended to the file name "
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"specified in the --convert option."),
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cl::value_desc("path"), cat(ConversionOptions));
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static alias OutputFilenameAlias("o", desc("Alias for -out-file."),
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aliasopt(OutputFilename),
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cat(ConversionOptions));
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static opt<bool> Verify("verify",
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desc("Verify the generated GSYM file against the "
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"information in the file that was converted."),
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cat(ConversionOptions));
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static opt<unsigned>
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NumThreads("num-threads",
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desc("Specify the maximum number (n) of simultaneous threads "
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"to use when converting files to GSYM.\nDefaults to the "
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"number of cores on the current machine."),
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cl::value_desc("n"), cat(ConversionOptions));
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static list<uint64_t> LookupAddresses("address",
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desc("Lookup an address in a GSYM file"),
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cl::value_desc("addr"),
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cat(LookupOptions));
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} // namespace
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/// @}
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//===----------------------------------------------------------------------===//
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static void error(StringRef Prefix, llvm::Error Err) {
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if (!Err)
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return;
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errs() << Prefix << ": " << Err << "\n";
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consumeError(std::move(Err));
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exit(1);
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}
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static void error(StringRef Prefix, std::error_code EC) {
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if (!EC)
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return;
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errs() << Prefix << ": " << EC.message() << "\n";
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exit(1);
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}
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/// If the input path is a .dSYM bundle (as created by the dsymutil tool),
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/// replace it with individual entries for each of the object files inside the
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/// bundle otherwise return the input path.
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static std::vector<std::string> expandBundle(const std::string &InputPath) {
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std::vector<std::string> BundlePaths;
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SmallString<256> BundlePath(InputPath);
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// Manually open up the bundle to avoid introducing additional dependencies.
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if (sys::fs::is_directory(BundlePath) &&
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sys::path::extension(BundlePath) == ".dSYM") {
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std::error_code EC;
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sys::path::append(BundlePath, "Contents", "Resources", "DWARF");
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for (sys::fs::directory_iterator Dir(BundlePath, EC), DirEnd;
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Dir != DirEnd && !EC; Dir.increment(EC)) {
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const std::string &Path = Dir->path();
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sys::fs::file_status Status;
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EC = sys::fs::status(Path, Status);
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error(Path, EC);
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switch (Status.type()) {
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case sys::fs::file_type::regular_file:
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case sys::fs::file_type::symlink_file:
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case sys::fs::file_type::type_unknown:
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BundlePaths.push_back(Path);
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break;
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default: /*ignore*/;
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}
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}
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error(BundlePath, EC);
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}
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if (!BundlePaths.size())
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BundlePaths.push_back(InputPath);
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return BundlePaths;
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}
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static uint32_t getCPUType(MachOObjectFile &MachO) {
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if (MachO.is64Bit())
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return MachO.getHeader64().cputype;
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else
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return MachO.getHeader().cputype;
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}
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/// Return true if the object file has not been filtered by an --arch option.
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static bool filterArch(MachOObjectFile &Obj) {
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if (ArchFilters.empty())
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return true;
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Triple ObjTriple(Obj.getArchTriple());
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StringRef ObjArch = ObjTriple.getArchName();
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for (auto Arch : ArchFilters) {
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// Match name.
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if (Arch == ObjArch)
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return true;
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// Match architecture number.
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unsigned Value;
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if (!StringRef(Arch).getAsInteger(0, Value))
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if (Value == getCPUType(Obj))
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return true;
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}
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return false;
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}
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/// Determine the virtual address that is considered the base address of an ELF
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/// object file.
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///
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/// The base address of an ELF file is the the "p_vaddr" of the first program
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/// header whose "p_type" is PT_LOAD.
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///
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/// \param ELFFile An ELF object file we will search.
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///
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/// \returns A valid image base address if we are able to extract one.
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template <class ELFT>
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static llvm::Optional<uint64_t>
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getImageBaseAddress(const object::ELFFile<ELFT> &ELFFile) {
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auto PhdrRangeOrErr = ELFFile.program_headers();
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if (!PhdrRangeOrErr) {
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consumeError(PhdrRangeOrErr.takeError());
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return llvm::None;
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}
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for (const typename ELFT::Phdr &Phdr : *PhdrRangeOrErr)
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if (Phdr.p_type == ELF::PT_LOAD)
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return (uint64_t)Phdr.p_vaddr;
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return llvm::None;
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}
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/// Determine the virtual address that is considered the base address of mach-o
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/// object file.
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///
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/// The base address of a mach-o file is the vmaddr of the "__TEXT" segment.
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///
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/// \param MachO A mach-o object file we will search.
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///
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/// \returns A valid image base address if we are able to extract one.
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static llvm::Optional<uint64_t>
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getImageBaseAddress(const object::MachOObjectFile *MachO) {
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for (const auto &Command : MachO->load_commands()) {
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if (Command.C.cmd == MachO::LC_SEGMENT) {
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MachO::segment_command SLC = MachO->getSegmentLoadCommand(Command);
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StringRef SegName = SLC.segname;
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if (SegName == "__TEXT")
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return SLC.vmaddr;
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} else if (Command.C.cmd == MachO::LC_SEGMENT_64) {
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MachO::segment_command_64 SLC = MachO->getSegment64LoadCommand(Command);
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StringRef SegName = SLC.segname;
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if (SegName == "__TEXT")
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return SLC.vmaddr;
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}
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}
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return llvm::None;
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}
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/// Determine the virtual address that is considered the base address of an
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/// object file.
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///
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/// Since GSYM files are used for symbolication, many clients will need to
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/// easily adjust addresses they find in stack traces so the lookups happen
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/// on unslid addresses from the original object file. If the base address of
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/// a GSYM file is set to the base address of the image, then this address
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/// adjusting is much easier.
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///
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/// \param Obj An object file we will search.
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///
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/// \returns A valid image base address if we are able to extract one.
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static llvm::Optional<uint64_t> getImageBaseAddress(object::ObjectFile &Obj) {
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if (const auto *MachO = dyn_cast<object::MachOObjectFile>(&Obj))
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return getImageBaseAddress(MachO);
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else if (const auto *ELFObj = dyn_cast<object::ELF32LEObjectFile>(&Obj))
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return getImageBaseAddress(ELFObj->getELFFile());
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else if (const auto *ELFObj = dyn_cast<object::ELF32BEObjectFile>(&Obj))
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return getImageBaseAddress(ELFObj->getELFFile());
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else if (const auto *ELFObj = dyn_cast<object::ELF64LEObjectFile>(&Obj))
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return getImageBaseAddress(ELFObj->getELFFile());
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else if (const auto *ELFObj = dyn_cast<object::ELF64BEObjectFile>(&Obj))
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return getImageBaseAddress(ELFObj->getELFFile());
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return llvm::None;
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}
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static llvm::Error handleObjectFile(ObjectFile &Obj,
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const std::string &OutFile) {
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auto ThreadCount =
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NumThreads > 0 ? NumThreads : std::thread::hardware_concurrency();
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auto &OS = outs();
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GsymCreator Gsym;
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// See if we can figure out the base address for a given object file, and if
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// we can, then set the base address to use to this value. This will ease
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// symbolication since clients can slide the GSYM lookup addresses by using
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// the load bias of the shared library.
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if (auto ImageBaseAddr = getImageBaseAddress(Obj))
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Gsym.setBaseAddress(*ImageBaseAddr);
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// We need to know where the valid sections are that contain instructions.
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// See header documentation for DWARFTransformer::SetValidTextRanges() for
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// defails.
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AddressRanges TextRanges;
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for (const object::SectionRef &Sect : Obj.sections()) {
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if (!Sect.isText())
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continue;
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const uint64_t Size = Sect.getSize();
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if (Size == 0)
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continue;
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const uint64_t StartAddr = Sect.getAddress();
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TextRanges.insert(AddressRange(StartAddr, StartAddr + Size));
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}
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// Make sure there is DWARF to convert first.
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std::unique_ptr<DWARFContext> DICtx = DWARFContext::create(Obj);
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if (!DICtx)
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return createStringError(std::errc::invalid_argument,
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"unable to create DWARF context");
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logAllUnhandledErrors(DICtx->loadRegisterInfo(Obj), OS,
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"DwarfTransformer: ");
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// Make a DWARF transformer object and populate the ranges of the code
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// so we don't end up adding invalid functions to GSYM data.
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DwarfTransformer DT(*DICtx, OS, Gsym);
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if (!TextRanges.empty())
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Gsym.SetValidTextRanges(TextRanges);
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// Convert all DWARF to GSYM.
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if (auto Err = DT.convert(ThreadCount))
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return Err;
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// Get the UUID and convert symbol table to GSYM.
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if (auto Err = ObjectFileTransformer::convert(Obj, OS, Gsym))
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return Err;
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// Finalize the GSYM to make it ready to save to disk. This will remove
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// duplicate FunctionInfo entries where we might have found an entry from
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// debug info and also a symbol table entry from the object file.
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if (auto Err = Gsym.finalize(OS))
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return Err;
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// Save the GSYM file to disk.
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support::endianness Endian = Obj.makeTriple().isLittleEndian() ?
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support::little : support::big;
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if (auto Err = Gsym.save(OutFile.c_str(), Endian))
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return Err;
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// Verify the DWARF if requested. This will ensure all the info in the DWARF
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// can be looked up in the GSYM and that all lookups get matching data.
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if (Verify) {
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if (auto Err = DT.verify(OutFile))
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return Err;
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}
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return Error::success();
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}
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static llvm::Error handleBuffer(StringRef Filename, MemoryBufferRef Buffer,
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const std::string &OutFile) {
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Expected<std::unique_ptr<Binary>> BinOrErr = object::createBinary(Buffer);
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error(Filename, errorToErrorCode(BinOrErr.takeError()));
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if (auto *Obj = dyn_cast<ObjectFile>(BinOrErr->get())) {
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Triple ObjTriple(Obj->makeTriple());
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auto ArchName = ObjTriple.getArchName();
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||
|
|
outs() << "Output file (" << ArchName << "): " << OutFile << "\n";
|
||
|
|
if (auto Err = handleObjectFile(*Obj, OutFile.c_str()))
|
||
|
|
return Err;
|
||
|
|
} else if (auto *Fat = dyn_cast<MachOUniversalBinary>(BinOrErr->get())) {
|
||
|
|
// Iterate over all contained architectures and filter out any that were
|
||
|
|
// not specified with the "--arch <arch>" option. If the --arch option was
|
||
|
|
// not specified on the command line, we will process all architectures.
|
||
|
|
std::vector< std::unique_ptr<MachOObjectFile> > FilterObjs;
|
||
|
|
for (auto &ObjForArch : Fat->objects()) {
|
||
|
|
if (auto MachOOrErr = ObjForArch.getAsObjectFile()) {
|
||
|
|
auto &Obj = **MachOOrErr;
|
||
|
|
if (filterArch(Obj))
|
||
|
|
FilterObjs.emplace_back(MachOOrErr->release());
|
||
|
|
} else {
|
||
|
|
error(Filename, MachOOrErr.takeError());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (FilterObjs.empty())
|
||
|
|
error(Filename, createStringError(std::errc::invalid_argument,
|
||
|
|
"no matching architectures found"));
|
||
|
|
|
||
|
|
// Now handle each architecture we need to convert.
|
||
|
|
for (auto &Obj: FilterObjs) {
|
||
|
|
Triple ObjTriple(Obj->getArchTriple());
|
||
|
|
auto ArchName = ObjTriple.getArchName();
|
||
|
|
std::string ArchOutFile(OutFile);
|
||
|
|
// If we are only handling a single architecture, then we will use the
|
||
|
|
// normal output file. If we are handling multiple architectures append
|
||
|
|
// the architecture name to the end of the out file path so that we
|
||
|
|
// don't overwrite the previous architecture's gsym file.
|
||
|
|
if (FilterObjs.size() > 1) {
|
||
|
|
ArchOutFile.append(1, '.');
|
||
|
|
ArchOutFile.append(ArchName.str());
|
||
|
|
}
|
||
|
|
outs() << "Output file (" << ArchName << "): " << ArchOutFile << "\n";
|
||
|
|
if (auto Err = handleObjectFile(*Obj, ArchOutFile))
|
||
|
|
return Err;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return Error::success();
|
||
|
|
}
|
||
|
|
|
||
|
|
static llvm::Error handleFileConversionToGSYM(StringRef Filename,
|
||
|
|
const std::string &OutFile) {
|
||
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> BuffOrErr =
|
||
|
|
MemoryBuffer::getFileOrSTDIN(Filename);
|
||
|
|
error(Filename, BuffOrErr.getError());
|
||
|
|
std::unique_ptr<MemoryBuffer> Buffer = std::move(BuffOrErr.get());
|
||
|
|
return handleBuffer(Filename, *Buffer, OutFile);
|
||
|
|
}
|
||
|
|
|
||
|
|
static llvm::Error convertFileToGSYM(raw_ostream &OS) {
|
||
|
|
// Expand any .dSYM bundles to the individual object files contained therein.
|
||
|
|
std::vector<std::string> Objects;
|
||
|
|
std::string OutFile = OutputFilename;
|
||
|
|
if (OutFile.empty()) {
|
||
|
|
OutFile = ConvertFilename;
|
||
|
|
OutFile += ".gsym";
|
||
|
|
}
|
||
|
|
|
||
|
|
OS << "Input file: " << ConvertFilename << "\n";
|
||
|
|
|
||
|
|
auto Objs = expandBundle(ConvertFilename);
|
||
|
|
llvm::append_range(Objects, Objs);
|
||
|
|
|
||
|
|
for (auto Object : Objects) {
|
||
|
|
if (auto Err = handleFileConversionToGSYM(Object, OutFile))
|
||
|
|
return Err;
|
||
|
|
}
|
||
|
|
return Error::success();
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(int argc, char const *argv[]) {
|
||
|
|
// Print a stack trace if we signal out.
|
||
|
|
sys::PrintStackTraceOnErrorSignal(argv[0]);
|
||
|
|
PrettyStackTraceProgram X(argc, argv);
|
||
|
|
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
|
||
|
|
|
||
|
|
llvm::InitializeAllTargets();
|
||
|
|
|
||
|
|
const char *Overview =
|
||
|
|
"A tool for dumping, searching and creating GSYM files.\n\n"
|
||
|
|
"Specify one or more GSYM paths as arguments to dump all of the "
|
||
|
|
"information in each GSYM file.\n"
|
||
|
|
"Specify a single GSYM file along with one or more --lookup options to "
|
||
|
|
"lookup addresses within that GSYM file.\n"
|
||
|
|
"Use the --convert option to specify a file with option --out-file "
|
||
|
|
"option to convert to GSYM format.\n";
|
||
|
|
HideUnrelatedOptions(
|
||
|
|
{&GeneralOptions, &ConversionOptions, &LookupOptions});
|
||
|
|
cl::ParseCommandLineOptions(argc, argv, Overview);
|
||
|
|
|
||
|
|
if (Help) {
|
||
|
|
PrintHelpMessage(/*Hidden =*/false, /*Categorized =*/true);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
raw_ostream &OS = outs();
|
||
|
|
|
||
|
|
if (!ConvertFilename.empty()) {
|
||
|
|
// Convert DWARF to GSYM
|
||
|
|
if (!InputFilenames.empty()) {
|
||
|
|
OS << "error: no input files can be specified when using the --convert "
|
||
|
|
"option.\n";
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
// Call error() if we have an error and it will exit with a status of 1
|
||
|
|
if (auto Err = convertFileToGSYM(OS))
|
||
|
|
error("DWARF conversion failed: ", std::move(Err));
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Dump or access data inside GSYM files
|
||
|
|
for (const auto &GSYMPath : InputFilenames) {
|
||
|
|
auto Gsym = GsymReader::openFile(GSYMPath);
|
||
|
|
if (!Gsym)
|
||
|
|
error(GSYMPath, Gsym.takeError());
|
||
|
|
|
||
|
|
if (LookupAddresses.empty()) {
|
||
|
|
Gsym->dump(outs());
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Lookup an address in a GSYM file and print any matches.
|
||
|
|
OS << "Looking up addresses in \"" << GSYMPath << "\":\n";
|
||
|
|
for (auto Addr: LookupAddresses) {
|
||
|
|
if (auto Result = Gsym->lookup(Addr)) {
|
||
|
|
// If verbose is enabled dump the full function info for the address.
|
||
|
|
if (Verbose) {
|
||
|
|
if (auto FI = Gsym->getFunctionInfo(Addr)) {
|
||
|
|
OS << "FunctionInfo for " << HEX64(Addr) << ":\n";
|
||
|
|
Gsym->dump(OS, *FI);
|
||
|
|
OS << "\nLookupResult for " << HEX64(Addr) << ":\n";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
OS << Result.get();
|
||
|
|
} else {
|
||
|
|
if (Verbose)
|
||
|
|
OS << "\nLookupResult for " << HEX64(Addr) << ":\n";
|
||
|
|
OS << HEX64(Addr) << ": ";
|
||
|
|
logAllUnhandledErrors(Result.takeError(), OS, "error: ");
|
||
|
|
}
|
||
|
|
if (Verbose)
|
||
|
|
OS << "\n";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return EXIT_SUCCESS;
|
||
|
|
}
|