#include "StackTrace.h"

int StackTrace::a = 0;

StackTrace::StackTrace(){};
StackTrace::~StackTrace(){};

void StackTrace::show(const char* szBriefInfo)
{
	static const int STACK_INFO_LEN = 1024;
	static const int MAX_STACK_FRAMES = 12;
	void *pStack[MAX_STACK_FRAMES];
	static char szStackInfo[STACK_INFO_LEN * MAX_STACK_FRAMES];

	char ** pStackList = NULL;
	int frames = backtrace(pStack, MAX_STACK_FRAMES);
	pStackList = backtrace_symbols(pStack, frames);
	if (NULL == pStackList)
		return;

	strcpy(szStackInfo, szBriefInfo == NULL ? "stack traceback:\n" : szBriefInfo);
	for (int i = 0; i < frames; ++i)
	{
		if (NULL == pStackList[i])
			break;

		strncat(szStackInfo, pStackList[i], STACK_INFO_LEN);
		strcat(szStackInfo, "\n");
	}

	printf("%s", szStackInfo); // 输出到控制台，也可以打印到日志文件中
}

void StackTrace::backtraceFunc(){
	show("111,backtrace is:\n");
	
	auto printtrace1 = [&](const char* str){
		show("222,backtrace is:\n");
		return [&]{ return show(str); };
	};
	
	auto f = printtrace1("333,backtrace is:\n");
	f();
}

void StackTrace::testBacktrace(){//测试调用栈信息
	backtraceFunc();	
}