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Asked: 2026-06-15T16:50:59+00:00

I need to modify existing C app and print stacktrace at certain place. How

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I need to modify existing C app and print stacktrace at certain place. How can I do this?

I can’t compile this source:

#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#ifndef __USE_GNU
#define __USE_GNU
#endif

#include <execinfo.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ucontext.h>
#include <unistd.h>


int main(int argc, char ** argv)
{
 void *             array[50];
 void *             caller_address;
 char **            messages;

 int size = backtrace(array, 50);

 /* overwrite sigaction with caller's address */
 array[1] = caller_address;

 messages = backtrace_symbols(array, size);

 /* skip first stack frame (points here) */
 for (int i = 1; i < size && messages != NULL; ++i)
 {
  fprintf(stderr, "[bt]: (%d) %s\n", i, messages[i]);
 }

 free(messages);


}

because it lacks some symbols:

$ i586-mingw32msvc-gcc -rdynamic ./trace.cpp -I/usr/include/
i586-mingw32msvc-gcc: unrecognized option '-rdynamic'
./trace.cpp:39:2: warning: no newline at end of file
/tmp/cc6hCJtU.o:trace.cpp:(.text+0x26): undefined reference to `_backtrace'
/tmp/cc6hCJtU.o:trace.cpp:(.text+0x47): undefined reference to `_backtrace_symbols'
/tmp/cc6hCJtU.o:trace.cpp:(.text+0x67): undefined reference to `_stderr'

I didn’t manage to file proper .a file.

Following answers, that can be found here on stackoverflow are practically unusable:

Is there any working solution? Thanks alot in advance.

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1 Answer

  1. Editorial Team

    Your MinGW toolchain doesn’t have support for the -rdynamic flag and cannot compile your application using backtrace() or backtrace_symbols()

    Not sure what MinGW you are using but I would recommend getting a fresh one from here: http://mingw-w64.sourceforge.net/

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