Please use GitHub pull requests for new patches. Avoid migrating existing patches. Phabricator shutdown timeline

Authored By

	wf520gg
	Apr 28 2023, 12:05 AM

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a.cpp
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	// a.c
	#include <unwind.h>
	#include <signal.h>
	#include <stdio.h>
	#include <stdlib.h>

	_Unwind_Reason_Code FrameCounter(_Unwind_Context* ctx, void* arg) {
	int* count_ptr = reinterpret_cast<int*>(arg);
	++*count_ptr;
	return _URC_NO_REASON;
	}

	int g_handler_frame_count = 0;

	static void handler(int signo) {
	_Unwind_Backtrace(FrameCounter, &g_handler_frame_count);
	printf("back trace count %d\n",g_handler_frame_count);
	}

	int main() {
	signal(SIGUSR1, handler);
	raise(SIGUSR1);
	return 1;
	}