trace call stack

trace.cpp

#include <execinfo.h>
void print_trace (void) {
	void *ppArrays[256];
	int nTraceNum = backtrace(ppArrays, sizeof(ppArrays) / sizeof(ppArrays[0]));
	char **ppSymbols = backtrace_symbols(ppArrays, nTraceNum);
	if (ppSymbols != NULL) {
		printf("Obtained %d stack frames.\n", nTraceNum);
		for (int i = 0; i < nTraceNum; i++) {
			printf("%s\n", ppSymbols[i]);
		}
	}
	free(ppSymbols);
}