Function demangle_function

src/debug.cpp:42–86

* Parse a mangled symbol and offset in the backtrace_symbols format: * * executable(function+offset) [global offset] */

 * executable(function+offset) [global offset]
 */
demangling_result demangle_function(std::string symbol)
{
    demangling_result result;
    size_t offset_begin = symbol.find_first_of("[");
    size_t offset_end   = symbol.find_first_of("]");

    if ((offset_begin != std::string::npos) && (offset_end != std::string::npos) &&
        (offset_begin < offset_end))
    {
        offset_begin++;
        result.address = symbol.substr(offset_begin, offset_end - offset_begin);
    }

    size_t function_begin = symbol.find_first_of("(");
    if (function_begin != std::string::npos)
    {
        result.executable = symbol.substr(0, function_begin);
    }

    size_t function_end = symbol.find_first_of("+");
    if ((function_begin == std::string::npos) ||
        (function_end == std::string::npos) ||
        (function_begin >= function_end))
    {
        return result;
    }

    ++function_begin;
    std::string function_name = symbol.substr(function_begin,
        function_end - function_begin);

    int status;
    char *demangled = abi::__cxa_demangle(function_name.data(), NULL, NULL, &status);
    if (status != 0)
    {
        free(demangled);

        return result;
    }

    result.function_name = demangled;
    free(demangled);

    return result;
}

/**
 * Execute the given command and read the first line of its output.