1. 使用发信号方式，在信号处理函数中调用： "sudo gcore %d", getpid()

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <execinfo.h>
#include <iostream>
#include <chrono>
#include <thread>
#include <ucontext.h>
#include <unistd.h>

void handler(int signo, siginfo_t *info, void *context)
{
	ucontext_t* ctx = (ucontext_t*)context;

	void *trace[16];
	char **messages = (char **)NULL;
	int i, trace_size = 0;

	trace_size = backtrace(trace, 16);

	/* overwrite sigaction with caller's address */
	trace[1] = (void *)ctx->uc_mcontext.gregs[REG_RIP];
	messages = backtrace_symbols(trace, trace_size);

	/* skip first stack frame (points here) */
	printf("[bt] Execution path:\n");
	for (i = 1; i < trace_size; ++i)
	{
		printf("[bt] #%d %s\n", i, messages[i]);

		/* find first occurence of '(' or ' ' in message[i] and assume
		 * everything before that is the file name. (Don't go beyond 0 though
		 * (string terminator)*/
		size_t p = 0;
		while(messages[i][p] != '(' && messages[i][p] != ' ' && messages[i][p] != 0)
			++p;

		char syscom[256];

		/* /usr/bin/addr2line */
		sprintf(syscom,"addr2line %p -e %.*s", trace[i], p, messages[i]);

		//last parameter is the file name of the symbol
		system(syscom);
	}

	char cmd[64] = {0};
	sprintf(cmd, "sudo gcore %d", getpid());
	system(cmd);
	return;
}

pthread_t id = 0;
bool bExit = false;
int main() 
{
	std::cout << "hello, world!" << std::endl;
	std::thread td([=]()
			{
			id = pthread_self();
			struct sigaction sa={0} ;

			/* Install our signal handler */
			sa.sa_sigaction = &handler;
			sigemptyset(&sa.sa_mask);
			sa.sa_flags = 0;

			sigaction(SIGALRM, &sa, NULL);


			while(!bExit)
			{
			std::cout << "Hello waiter\n" << std::flush;
			auto start = std::chrono::high_resolution_clock::now();
			std::this_thread::sleep_for(std::chrono::seconds(1));
			};				
			
			std::cout << "bye" << std::endl;
			});

	td.detach();
	std::cout << "input a integer" << std::endl;
	int n = 0;
	std::cin >> n;
	if (id != 0)
		pthread_kill(id, SIGALRM);
	bExit = true;
	std::this_thread::sleep_for(std::chrono::seconds(4));

	return 0;
}

2. 编译

g++ -g -std=c++0x -pthread  -rdynamic *.cpp -o bs

 

3. 运行后生存转储文件，用gdb打开：  gdb bs core.5114