1 //===-- llvm-undname.cpp - Microsoft ABI name undecorator
2 //------------------===//
3 //
4 // The LLVM Compiler Infrastructure
5 //
6 // This file is distributed under the University of Illinois Open Source
7 // License. See LICENSE.TXT for details.
8 //
9 //===----------------------------------------------------------------------===//
10 //
11 // This utility works like the windows undname utility. It converts mangled
12 // Microsoft symbol names into pretty C/C++ human-readable names.
13 //
14 //===----------------------------------------------------------------------===//
15
16 #include "llvm/ADT/StringRef.h"
17 #include "llvm/Demangle/Demangle.h"
18 #include "llvm/Support/CommandLine.h"
19 #include "llvm/Support/InitLLVM.h"
20 #include "llvm/Support/Process.h"
21 #include "llvm/Support/raw_ostream.h"
22 #include <cstdio>
23 #include <cstring>
24 #include <iostream>
25 #include <string>
26
27 using namespace llvm;
28
29 cl::list<std::string> Symbols(cl::Positional, cl::desc("<input symbols>"),
30 cl::ZeroOrMore);
31
demangle(const std::string & S)32 static void demangle(const std::string &S) {
33 int Status;
34 char *ResultBuf = microsoftDemangle(S.c_str(), nullptr, nullptr, &Status);
35 if (Status == llvm::demangle_success) {
36 outs() << ResultBuf << "\n";
37 outs().flush();
38 } else {
39 errs() << "Error: Invalid mangled name\n";
40 }
41 std::free(ResultBuf);
42 }
43
main(int argc,char ** argv)44 int main(int argc, char **argv) {
45 InitLLVM X(argc, argv);
46
47 cl::ParseCommandLineOptions(argc, argv, "llvm-undname\n");
48
49 if (Symbols.empty()) {
50 while (true) {
51 std::string LineStr;
52 std::getline(std::cin, LineStr);
53 if (std::cin.eof())
54 break;
55
56 StringRef Line(LineStr);
57 Line = Line.trim();
58 if (Line.empty() || Line.startswith("#") || Line.startswith(";"))
59 continue;
60
61 // If the user is manually typing in these decorated names, don't echo
62 // them to the terminal a second time. If they're coming from redirected
63 // input, however, then we should display the input line so that the
64 // mangled and demangled name can be easily correlated in the output.
65 if (!sys::Process::StandardInIsUserInput()) {
66 outs() << Line << "\n";
67 outs().flush();
68 }
69 demangle(Line);
70 outs() << "\n";
71 }
72 } else {
73 for (StringRef S : Symbols) {
74 outs() << S << "\n";
75 outs().flush();
76 demangle(S);
77 outs() << "\n";
78 }
79 }
80
81 return 0;
82 }
83