Christopher Ferris | a11dc8f | 2017-03-13 15:54:55 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <getopt.h> |
| 18 | #include <stdio.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <string.h> |
| 21 | #include <unistd.h> |
| 22 | |
Elliott Hughes | 102183e | 2017-03-24 23:48:03 -0700 | [diff] [blame^] | 23 | #include <cctype> |
Christopher Ferris | a11dc8f | 2017-03-13 15:54:55 -0700 | [diff] [blame] | 24 | #include <string> |
| 25 | |
| 26 | #include <demangle.h> |
| 27 | |
| 28 | extern "C" char* __cxa_demangle(const char*, char*, size_t*, int*); |
| 29 | |
Elliott Hughes | 102183e | 2017-03-24 23:48:03 -0700 | [diff] [blame^] | 30 | static void Usage(const char* prog_name) { |
| 31 | printf("usage: %s [-c] [NAME_TO_DEMANGLE...]\n", prog_name); |
| 32 | printf("\n"); |
| 33 | printf("Demangles C++ mangled names if supplied on the command-line, or found\n"); |
| 34 | printf("reading from stdin otherwise.\n"); |
| 35 | printf("\n"); |
| 36 | printf("-c\tCompare against __cxa_demangle\n"); |
| 37 | printf("\n"); |
Christopher Ferris | a11dc8f | 2017-03-13 15:54:55 -0700 | [diff] [blame] | 38 | } |
| 39 | |
Elliott Hughes | 102183e | 2017-03-24 23:48:03 -0700 | [diff] [blame^] | 40 | static std::string DemangleWithCxa(const char* name) { |
Christopher Ferris | a11dc8f | 2017-03-13 15:54:55 -0700 | [diff] [blame] | 41 | const char* cxa_demangle = __cxa_demangle(name, nullptr, nullptr, nullptr); |
Christopher Ferris | a11dc8f | 2017-03-13 15:54:55 -0700 | [diff] [blame] | 42 | if (cxa_demangle == nullptr) { |
| 43 | return name; |
| 44 | } |
| 45 | |
| 46 | // The format of our demangler is slightly different from the cxa demangler |
| 47 | // so modify the cxa demangler output. Specifically, for templates, remove |
| 48 | // the spaces between '>' and '>'. |
| 49 | std::string demangled_str; |
| 50 | for (size_t i = 0; i < strlen(cxa_demangle); i++) { |
| 51 | if (i > 2 && cxa_demangle[i] == '>' && std::isspace(cxa_demangle[i - 1]) && |
| 52 | cxa_demangle[i - 2] == '>') { |
| 53 | demangled_str.resize(demangled_str.size() - 1); |
| 54 | } |
| 55 | demangled_str += cxa_demangle[i]; |
| 56 | } |
| 57 | return demangled_str; |
| 58 | } |
| 59 | |
Elliott Hughes | 102183e | 2017-03-24 23:48:03 -0700 | [diff] [blame^] | 60 | static void Compare(const char* name, const std::string& demangled_name) { |
| 61 | std::string cxa_demangled_name(DemangleWithCxa(name)); |
| 62 | if (cxa_demangled_name != demangled_name) { |
| 63 | printf("\nMismatch!\n"); |
| 64 | printf("\tmangled name: %s\n", name); |
| 65 | printf("\tour demangle: %s\n", demangled_name.c_str()); |
| 66 | printf("\tcxa demangle: %s\n", cxa_demangled_name.c_str()); |
| 67 | exit(1); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | static int Filter(bool compare) { |
| 72 | char* line = nullptr; |
| 73 | size_t line_length = 0; |
| 74 | |
| 75 | while ((getline(&line, &line_length, stdin)) != -1) { |
| 76 | char* p = line; |
| 77 | char* name; |
| 78 | while ((name = strstr(p, "_Z")) != nullptr) { |
| 79 | // Output anything before the identifier. |
| 80 | *name = 0; |
| 81 | printf("%s", p); |
| 82 | *name = '_'; |
| 83 | |
| 84 | // Extract the identifier. |
| 85 | p = name; |
| 86 | while (*p && (std::isalnum(*p) || *p == '_' || *p == '.' || *p == '$')) ++p; |
| 87 | |
| 88 | // Demangle and output. |
| 89 | std::string identifier(name, p); |
| 90 | std::string demangled_name = demangle(identifier.c_str()); |
| 91 | printf("%s", demangled_name.c_str()); |
| 92 | |
| 93 | if (compare) Compare(identifier.c_str(), demangled_name); |
| 94 | } |
| 95 | // Output anything after the last identifier. |
| 96 | printf("%s", p); |
| 97 | } |
| 98 | |
| 99 | free(line); |
| 100 | return 0; |
| 101 | } |
| 102 | |
Christopher Ferris | a11dc8f | 2017-03-13 15:54:55 -0700 | [diff] [blame] | 103 | int main(int argc, char** argv) { |
| 104 | #ifdef __BIONIC__ |
| 105 | const char* prog_name = getprogname(); |
| 106 | #else |
| 107 | const char* prog_name = argv[0]; |
| 108 | #endif |
| 109 | |
| 110 | bool compare = false; |
| 111 | int opt_char; |
| 112 | while ((opt_char = getopt(argc, argv, "c")) != -1) { |
| 113 | if (opt_char == 'c') { |
| 114 | compare = true; |
| 115 | } else { |
Elliott Hughes | 102183e | 2017-03-24 23:48:03 -0700 | [diff] [blame^] | 116 | Usage(prog_name); |
Christopher Ferris | a11dc8f | 2017-03-13 15:54:55 -0700 | [diff] [blame] | 117 | return 1; |
| 118 | } |
| 119 | } |
Christopher Ferris | a11dc8f | 2017-03-13 15:54:55 -0700 | [diff] [blame] | 120 | |
Elliott Hughes | 102183e | 2017-03-24 23:48:03 -0700 | [diff] [blame^] | 121 | // With no arguments, act as a filter. |
| 122 | if (optind == argc) return Filter(compare); |
Christopher Ferris | a11dc8f | 2017-03-13 15:54:55 -0700 | [diff] [blame] | 123 | |
Elliott Hughes | 102183e | 2017-03-24 23:48:03 -0700 | [diff] [blame^] | 124 | // Otherwise demangle each argument. |
| 125 | while (optind < argc) { |
| 126 | const char* name = argv[optind++]; |
| 127 | std::string demangled_name = demangle(name); |
| 128 | printf("%s\n", demangled_name.c_str()); |
Christopher Ferris | a11dc8f | 2017-03-13 15:54:55 -0700 | [diff] [blame] | 129 | |
Elliott Hughes | 102183e | 2017-03-24 23:48:03 -0700 | [diff] [blame^] | 130 | if (compare) Compare(name, demangled_name); |
Christopher Ferris | a11dc8f | 2017-03-13 15:54:55 -0700 | [diff] [blame] | 131 | } |
| 132 | return 0; |
| 133 | } |