Function crash_handler

tests/crash_handler_execinfo.h:36–69

}

inline void crash_handler(int sig) {
    // Prevent recursion if handler crashes
    static volatile sig_atomic_t already_dumping = 0;
    if (already_dumping) {
        // Recursive crash - bail out immediately
        signal(sig, SIG_DFL);
        raise(sig);
        return;
    }
    already_dumping = 1;

    fprintf(stderr, "\n=== INTERNAL CRASH HANDLER (SIGNAL %d) ===\n", sig);

    // Internal stack trace dump
    print_stacktrace_execinfo();

    fprintf(stderr, "=== END INTERNAL HANDLER ===\n\n");
    fflush(stdout);
    fflush(stderr);

    // CHAINING: Uninstall our handler and re-raise signal
    // This allows external debuggers to catch the signal
    fprintf(stderr, "Uninstalling crash handler and re-raising signal %d for external debugger...\n", sig);
    fflush(stderr);

    // Restore default handler
    signal(sig, SIG_DFL);

    // Re-raise the signal - will now go to default handler or external debugger
    raise(sig);

    // If we get here, signal didn't terminate us - exit manually
    exit(1);
}

inline void setup_crash_handler() {
    // Check if crash handler should be disabled (for debugger attachment)