llvm-cxxfilt.cpp revision 341825 
1//===-- llvm-c++filt.cpp --------------------------------------------------===//
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 "llvm/Demangle/Demangle.h"
11#include "llvm/Support/CommandLine.h"
12#include "llvm/Support/InitLLVM.h"
13#include "llvm/Support/raw_ostream.h"
14#include <cstdlib>
15#include <iostream>
16
17using namespace llvm;
18
19enum Style {
20  Auto,  ///< auto-detect mangling
21  GNU,   ///< GNU
22  Lucid, ///< Lucid compiler (lcc)
23  ARM,
24  HP,    ///< HP compiler (xCC)
25  EDG,   ///< EDG compiler
26  GNUv3, ///< GNU C++ v3 ABI
27  Java,  ///< Java (gcj)
28  GNAT   ///< ADA copiler (gnat)
29};
30static cl::opt<Style>
31    Format("format", cl::desc("decoration style"),
32           cl::values(clEnumValN(Auto, "auto", "auto-detect style"),
33                      clEnumValN(GNU, "gnu", "GNU (itanium) style")),
34           cl::init(Auto));
35static cl::alias FormatShort("s", cl::desc("alias for --format"),
36                             cl::aliasopt(Format));
37
38static cl::opt<bool> StripUnderscore("strip-underscore",
39                                     cl::desc("strip the leading underscore"),
40                                     cl::init(false));
41static cl::alias StripUnderscoreShort("_",
42                                      cl::desc("alias for --strip-underscore"),
43                                      cl::aliasopt(StripUnderscore));
44
45static cl::opt<bool>
46    Types("types",
47          cl::desc("attempt to demangle types as well as function names"),
48          cl::init(false));
49static cl::alias TypesShort("t", cl::desc("alias for --types"),
50                            cl::aliasopt(Types));
51
52static cl::list<std::string>
53Decorated(cl::Positional, cl::desc("<mangled>"), cl::ZeroOrMore);
54
55static void demangle(llvm::raw_ostream &OS, const std::string &Mangled) {
56  int Status;
57
58  const char *Decorated = Mangled.c_str();
59  if (StripUnderscore)
60    if (Decorated[0] == '_')
61      ++Decorated;
62  size_t DecoratedLength = strlen(Decorated);
63
64  char *Undecorated = nullptr;
65
66  if (Types || ((DecoratedLength >= 2 && strncmp(Decorated, "_Z", 2) == 0) ||
67                (DecoratedLength >= 4 && strncmp(Decorated, "___Z", 4) == 0)))
68    Undecorated = itaniumDemangle(Decorated, nullptr, nullptr, &Status);
69
70  if (!Undecorated &&
71      (DecoratedLength > 6 && strncmp(Decorated, "__imp_", 6) == 0)) {
72    OS << "import thunk for ";
73    Undecorated = itaniumDemangle(Decorated + 6, nullptr, nullptr, &Status);
74  }
75
76  OS << (Undecorated ? Undecorated : Mangled) << '\n';
77  OS.flush();
78
79  free(Undecorated);
80}
81
82int main(int argc, char **argv) {
83  InitLLVM X(argc, argv);
84
85  cl::ParseCommandLineOptions(argc, argv, "llvm symbol undecoration tool\n");
86
87  if (Decorated.empty())
88    for (std::string Mangled; std::getline(std::cin, Mangled);)
89      demangle(llvm::outs(), Mangled);
90  else
91    for (const auto &Symbol : Decorated)
92      demangle(llvm::outs(), Symbol);
93
94  return EXIT_SUCCESS;
95}
96