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
17 using namespace llvm;
18
19 enum 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 };
30 static 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));
35 static cl::alias FormatShort("s", cl::desc("alias for --format"),
36 cl::aliasopt(Format));
37
38 static cl::opt<bool> StripUnderscore("strip-underscore",
39 cl::desc("strip the leading underscore"),
40 cl::init(false));
41 static cl::alias StripUnderscoreShort("_",
42 cl::desc("alias for --strip-underscore"),
43 cl::aliasopt(StripUnderscore));
44
45 static cl::opt<bool>
46 Types("types",
47 cl::desc("attempt to demangle types as well as function names"),
48 cl::init(false));
49 static cl::alias TypesShort("t", cl::desc("alias for --types"),
50 cl::aliasopt(Types));
51
52 static cl::list<std::string>
53 Decorated(cl::Positional, cl::desc("<mangled>"), cl::ZeroOrMore);
54
demangle(llvm::raw_ostream & OS,const std::string & Mangled)55 static 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
main(int argc,char ** argv)82 int 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