Function duckgres_crash_handler

internal/crashhandler/handler.c:84–110

}

static void duckgres_crash_handler(int sig, siginfo_t *info, void *uctx) {
	// Keep this prefix in sync with crashhandler.Marker.
	crash_write("\nduckgres: fatal native signal ");
	crash_write(crash_signame(sig));
	crash_write(" pc ");
	crash_write_hex(crash_pc(uctx));
	crash_write(" fault addr ");
	crash_write_hex(info != NULL ? (uintptr_t)info->si_addr : 0);
	crash_write(" - backtrace of crashed thread:\n");

	void *bt[64];
	int n = backtrace(bt, 64);
	backtrace_symbols_fd(bt, n, STDERR_FILENO);

	crash_write("duckgres: terminating with default signal disposition\n");

	// Restore the default disposition and re-raise so the process dies with
	// the original signal (and dumps core where enabled) instead of wedging.
	struct sigaction dfl;
	memset(&dfl, 0, sizeof(dfl));
	dfl.sa_handler = SIG_DFL;
	sigemptyset(&dfl.sa_mask);
	sigaction(sig, &dfl, NULL);
	raise(sig);
	// If the signal is blocked during handler execution, returning re-executes
	// the faulting instruction and the (now default) action fires then.
}

__attribute__((constructor)) static void duckgres_crashhandler_install(void) {
	struct sigaction sa;