llvm/tools/obj2yaml/obj2yaml.cpp

   1 //===------ utils/obj2yaml.cpp - obj2yaml conversion tool -------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "obj2yaml.h"
  10 #include "llvm/BinaryFormat/Magic.h"
  11 #include "llvm/Object/Archive.h"
  12 #include "llvm/Object/COFF.h"
  13 #include "llvm/Object/Minidump.h"
  14 #include "llvm/Support/CommandLine.h"
  15 #include "llvm/Support/Errc.h"
  16 #include "llvm/Support/InitLLVM.h"
  17
  18 using namespace llvm;
  19 using namespace llvm::object;
  20
  21 static Error dumpObject(const ObjectFile &Obj) {
  22   if (Obj.isCOFF())
  23     return errorCodeToError(coff2yaml(outs(), cast<COFFObjectFile>(Obj)));
  24
  25   if (Obj.isXCOFF())
  26     return errorCodeToError(xcoff2yaml(outs(), cast<XCOFFObjectFile>(Obj)));
  27
  28   if (Obj.isELF())
  29     return elf2yaml(outs(), Obj);
  30
  31   if (Obj.isWasm())
  32     return errorCodeToError(wasm2yaml(outs(), cast<WasmObjectFile>(Obj)));
  33
  34   llvm_unreachable("unexpected object file format");
  35 }
  36
  37 static Error dumpInput(StringRef File) {
  38   ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
  39       MemoryBuffer::getFileOrSTDIN(File, /*FileSize=*/-1,
  40                                    /*RequiresNullTerminator=*/false);
  41   if (std::error_code EC = FileOrErr.getError())
  42     return errorCodeToError(EC);
  43   std::unique_ptr<MemoryBuffer> &Buffer = FileOrErr.get();
  44   MemoryBufferRef MemBuf = Buffer->getMemBufferRef();
  45   if (file_magic::archive == identify_magic(MemBuf.getBuffer()))
  46     return archive2yaml(outs(), MemBuf);
  47
  48   Expected<std::unique_ptr<Binary>> BinOrErr =
  49       createBinary(MemBuf, /*Context=*/nullptr);
  50   if (!BinOrErr)
  51     return BinOrErr.takeError();
  52
  53   Binary &Binary = *BinOrErr->get();
  54   // Universal MachO is not a subclass of ObjectFile, so it needs to be handled
  55   // here with the other binary types.
  56   if (Binary.isMachO() || Binary.isMachOUniversalBinary())
  57     return macho2yaml(outs(), Binary);
  58   if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
  59     return dumpObject(*Obj);
  60   if (MinidumpFile *Minidump = dyn_cast<MinidumpFile>(&Binary))
  61     return minidump2yaml(outs(), *Minidump);
  62
  63   return Error::success();
  64 }
  65
  66 static void reportError(StringRef Input, Error Err) {
  67   if (Input == "-")
  68     Input = "<stdin>";
  69   std::string ErrMsg;
  70   raw_string_ostream OS(ErrMsg);
  71   logAllUnhandledErrors(std::move(Err), OS);
  72   OS.flush();
  73   errs() << "Error reading file: " << Input << ": " << ErrMsg;
  74   errs().flush();
  75 }
  76
  77 cl::opt<std::string> InputFilename(cl::Positional, cl::desc("<input file>"),
  78                                    cl::init("-"));
  79
  80 int main(int argc, char *argv[]) {
  81   InitLLVM X(argc, argv);
  82   cl::ParseCommandLineOptions(argc, argv);
  83
  84   if (Error Err = dumpInput(InputFilename)) {
  85     reportError(InputFilename, std::move(Err));
  86     return 1;
  87   }
  88
  89   return 0;
  90 }