98 lines
2.6 KiB
C++
98 lines
2.6 KiB
C++
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <string>
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#include <demangle.h>
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extern "C" char* __cxa_demangle(const char*, char*, size_t*, int*);
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void usage(const char* prog_name) {
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printf("Usage: %s [-c] <NAME_TO_DEMANGLE>\n", prog_name);
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printf(" -c\n");
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printf(" Compare the results of __cxa_demangle against the current\n");
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printf(" demangler.\n");
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}
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std::string DemangleWithCxa(const char* name) {
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const char* cxa_demangle = __cxa_demangle(name, nullptr, nullptr, nullptr);
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if (cxa_demangle == nullptr) {
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return name;
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}
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// The format of our demangler is slightly different from the cxa demangler
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// so modify the cxa demangler output. Specifically, for templates, remove
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// the spaces between '>' and '>'.
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std::string demangled_str;
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for (size_t i = 0; i < strlen(cxa_demangle); i++) {
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if (i > 2 && cxa_demangle[i] == '>' && std::isspace(cxa_demangle[i - 1]) &&
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cxa_demangle[i - 2] == '>') {
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demangled_str.resize(demangled_str.size() - 1);
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}
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demangled_str += cxa_demangle[i];
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}
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return demangled_str;
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}
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int main(int argc, char** argv) {
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#ifdef __BIONIC__
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const char* prog_name = getprogname();
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#else
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const char* prog_name = argv[0];
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#endif
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bool compare = false;
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int opt_char;
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while ((opt_char = getopt(argc, argv, "c")) != -1) {
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if (opt_char == 'c') {
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compare = true;
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} else {
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usage(prog_name);
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return 1;
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}
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}
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if (optind >= argc || argc - optind != 1) {
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printf("Must supply a single argument.\n\n");
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usage(prog_name);
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return 1;
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}
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const char* name = argv[optind];
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std::string demangled_name = demangle(name);
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printf("%s\n", demangled_name.c_str());
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if (compare) {
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std::string cxa_demangle_str(DemangleWithCxa(name));
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if (cxa_demangle_str != demangled_name) {
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printf("Mismatch\n");
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printf("cxa demangle: %s\n", cxa_demangle_str.c_str());
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return 1;
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} else {
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printf("Match\n");
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}
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}
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return 0;
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}
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