Add a binary to dump demangled names.

    ],

}

cc_binary {

    name: "demangle",

    defaults: ["libdemangle_defaults"],

    srcs: ["demangle.cpp"],

    host_supported: true,

    shared_libs: ["libdemangle"],

}

//-------------------------------------------------------------------------

// Unit Tests

//-------------------------------------------------------------------------

/*

 * Copyright (C) 2017 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <getopt.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include <string>

#include <demangle.h>

extern "C" char* __cxa_demangle(const char*, char*, size_t*, int*);

void usage(const char* prog_name) {

  printf("Usage: %s [-c] <NAME_TO_DEMANGLE>\n", prog_name);

  printf("  -c\n");

  printf("    Compare the results of __cxa_demangle against the current\n");

  printf("    demangler.\n");

}

std::string DemangleWithCxa(const char* name) {

  const char* cxa_demangle = __cxa_demangle(name, nullptr, nullptr, nullptr);

  if (cxa_demangle == nullptr) {

    return name;

  }

  // The format of our demangler is slightly different from the cxa demangler

  // so modify the cxa demangler output. Specifically, for templates, remove

  // the spaces between '>' and '>'.

  std::string demangled_str;

  for (size_t i = 0; i < strlen(cxa_demangle); i++) {

    if (i > 2 && cxa_demangle[i] == '>' && std::isspace(cxa_demangle[i - 1]) &&

        cxa_demangle[i - 2] == '>') {

      demangled_str.resize(demangled_str.size() - 1);

    }

    demangled_str += cxa_demangle[i];

  }

  return demangled_str;

}

int main(int argc, char** argv) {

#ifdef __BIONIC__

  const char* prog_name = getprogname();

#else

  const char* prog_name = argv[0];

#endif

  bool compare = false;

  int opt_char;

  while ((opt_char = getopt(argc, argv, "c")) != -1) {

    if (opt_char == 'c') {

      compare = true;

    } else {

      usage(prog_name);

      return 1;

    }

  }

  if (optind >= argc || argc - optind != 1) {

    printf("Must supply a single argument.\n\n");

    usage(prog_name);

    return 1;

  }

  const char* name = argv[optind];

  std::string demangled_name = demangle(name);

  printf("%s\n", demangled_name.c_str());

  if (compare) {

    std::string cxa_demangle_str(DemangleWithCxa(name));

    if (cxa_demangle_str != demangled_name) {

      printf("Mismatch\n");

      printf("cxa demangle: %s\n", cxa_demangle_str.c_str());

      return 1;

    } else {

      printf("Match\n");

    }

  }

  return 0;

}