{

std::ostringstream oss;

#if HAVE_EXECINFO_H

Dl_info info;

void *callstack[max_frames];

unsigned int number_frames = ::backtrace(callstack, max_frames);

char **symbols = ::backtrace_symbols(callstack, number_frames);

for (unsigned int i = 0; i < number_frames; ++i) {

/// try to translate an address to symbolic information

std::string func_name;

if (dladdr(callstack[i], &info)) {

int status = -1;

char *demangled = abi::__cxa_demangle(info.dli_sname, NULL, 0, &status);

if (demangled != nullptr) {

func_name = demangled;

free(demangled);

} else if (info.dli_sname != nullptr) {

func_name = info.dli_sname;

} else {

func_name = "null";

}

} else {

func_name = (symbols != nullptr ? symbols[i] : "null");

}

oss << '[' << std::setw(2) << i << "]: " << func_name << " <" << callstack[i] << '>' << std::endl;

}

if (symbols != nullptr)

free(symbols);

if (number_frames >= max_frames)

oss << "[truncated]" << std::endl;

#else

UNUSED_VAR(max_frames);

oss << "not support backtrace" << std::endl;

#endif //HAVE_EXECINFO_H

return oss.str();