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 | |
| 23 | #include <string> |
| 24 | |
| 25 | #include <demangle.h> |
| 26 | |
| 27 | extern "C" char* __cxa_demangle(const char*, char*, size_t*, int*); |
| 28 | |
| 29 | void usage(const char* prog_name) { |
| 30 | printf("Usage: %s [-c] <NAME_TO_DEMANGLE>\n", prog_name); |
| 31 | printf(" -c\n"); |
| 32 | printf(" Compare the results of __cxa_demangle against the current\n"); |
| 33 | printf(" demangler.\n"); |
| 34 | } |
| 35 | |
| 36 | std::string DemangleWithCxa(const char* name) { |
| 37 | const char* cxa_demangle = __cxa_demangle(name, nullptr, nullptr, nullptr); |
| 38 | |
| 39 | if (cxa_demangle == nullptr) { |
| 40 | return name; |
| 41 | } |
| 42 | |
| 43 | // The format of our demangler is slightly different from the cxa demangler |
| 44 | // so modify the cxa demangler output. Specifically, for templates, remove |
| 45 | // the spaces between '>' and '>'. |
| 46 | std::string demangled_str; |
| 47 | for (size_t i = 0; i < strlen(cxa_demangle); i++) { |
| 48 | if (i > 2 && cxa_demangle[i] == '>' && std::isspace(cxa_demangle[i - 1]) && |
| 49 | cxa_demangle[i - 2] == '>') { |
| 50 | demangled_str.resize(demangled_str.size() - 1); |
| 51 | } |
| 52 | demangled_str += cxa_demangle[i]; |
| 53 | } |
| 54 | return demangled_str; |
| 55 | } |
| 56 | |
| 57 | int main(int argc, char** argv) { |
| 58 | #ifdef __BIONIC__ |
| 59 | const char* prog_name = getprogname(); |
| 60 | #else |
| 61 | const char* prog_name = argv[0]; |
| 62 | #endif |
| 63 | |
| 64 | bool compare = false; |
| 65 | int opt_char; |
| 66 | while ((opt_char = getopt(argc, argv, "c")) != -1) { |
| 67 | if (opt_char == 'c') { |
| 68 | compare = true; |
| 69 | } else { |
| 70 | usage(prog_name); |
| 71 | return 1; |
| 72 | } |
| 73 | } |
| 74 | if (optind >= argc || argc - optind != 1) { |
| 75 | printf("Must supply a single argument.\n\n"); |
| 76 | usage(prog_name); |
| 77 | return 1; |
| 78 | } |
| 79 | const char* name = argv[optind]; |
| 80 | |
| 81 | std::string demangled_name = demangle(name); |
| 82 | |
| 83 | printf("%s\n", demangled_name.c_str()); |
| 84 | |
| 85 | if (compare) { |
| 86 | std::string cxa_demangle_str(DemangleWithCxa(name)); |
| 87 | |
| 88 | if (cxa_demangle_str != demangled_name) { |
| 89 | printf("Mismatch\n"); |
| 90 | printf("cxa demangle: %s\n", cxa_demangle_str.c_str()); |
| 91 | return 1; |
| 92 | } else { |
| 93 | printf("Match\n"); |
| 94 | } |
| 95 | } |
| 96 | return 0; |
| 97 | } |