1 //===------ utils/obj2yaml.cpp - obj2yaml conversion tool -------*- C++ -*-===//
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 #include "Error.h"
11 #include "obj2yaml.h"
12 #include "llvm/Object/Archive.h"
13 #include "llvm/Object/COFF.h"
14 #include "llvm/Support/CommandLine.h"
15 #include "llvm/Support/ManagedStatic.h"
16 #include "llvm/Support/PrettyStackTrace.h"
17 #include "llvm/Support/Signals.h"
18 
19 using namespace llvm;
20 using namespace llvm::object;
21 
22 static std::error_code dumpObject(const ObjectFile &Obj) {
23   if (Obj.isCOFF())
24     return coff2yaml(outs(), cast<COFFObjectFile>(Obj));
25   if (Obj.isELF())
26     return elf2yaml(outs(), Obj);
27   if (Obj.isWasm())
28     return wasm2yaml(outs(), cast<WasmObjectFile>(Obj));
29 
30   return obj2yaml_error::unsupported_obj_file_format;
31 }
32 
33 static Error dumpInput(StringRef File) {
34   Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(File);
35   if (!BinaryOrErr)
36     return BinaryOrErr.takeError();
37 
38   Binary &Binary = *BinaryOrErr.get().getBinary();
39   // Universal MachO is not a subclass of ObjectFile, so it needs to be handled
40   // here with the other binary types.
41   if (Binary.isMachO() || Binary.isMachOUniversalBinary())
42     return errorCodeToError(macho2yaml(outs(), Binary));
43   // TODO: If this is an archive, then burst it and dump each entry
44   if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
45     return errorCodeToError(dumpObject(*Obj));
46 
47   return Error::success();
48 }
49 
50 static void reportError(StringRef Input, Error Err) {
51   if (Input == "-")
52     Input = "<stdin>";
53   std::string ErrMsg;
54   raw_string_ostream OS(ErrMsg);
55   logAllUnhandledErrors(std::move(Err), OS, "");
56   OS.flush();
57   errs() << "Error reading file: " << Input << ": " << ErrMsg;
58   errs().flush();
59 }
60 
61 cl::opt<std::string> InputFilename(cl::Positional, cl::desc("<input file>"),
62                                    cl::init("-"));
63 
64 int main(int argc, char *argv[]) {
65   cl::ParseCommandLineOptions(argc, argv);
66   sys::PrintStackTraceOnErrorSignal(argv[0]);
67   PrettyStackTraceProgram X(argc, argv);
68   llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
69 
70   if (Error Err = dumpInput(InputFilename)) {
71     reportError(InputFilename, std::move(Err));
72     return 1;
73   }
74 
75   return 0;
76 }
77