Question

I would like to use this stacktrace method #4 implementation upon assertion failure.

So if there are no signals triggered, could you suggest a way to detect an assertion failure before the executable exits?

Answer 1

On Linux, an assert failure (if not disabled with -DNDEBUG) is doing (from /usr/include/assert.h)

# define assert(expr)                                                   \
  ((expr)                                                               \
   ? __ASSERT_VOID_CAST (0)                                             \
   : __assert_fail (__STRING(expr), __FILE__, __LINE__, __ASSERT_FUNCTION))

and the internal __assert_fail routine is calling abort, which sends a SIGABRT to the process, which you might catch if you really wanted to.

But a simpler way is to have your own “assert”-like macro. This is what many free software (GTK with g_assert, GCC with gcc_assert, …) are actually doing.