gcc-4.7: 'terminate called without an active exception' after unblocking in pending signal handler with pthread_exit

[Georgiy Kirichenko]

Hello!

I have strange behaviour for this simple code (compiled with gcc test.cpp -
lpthread -o test):
#include <stdio.h>
#include <signal.h>
#include <pthread.h>
#include <wait.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

void *thread_proc(void *arg)
{
  sigset_t sigs;
  sigemptyset(&sigs);
  sigaddset(&sigs, SIGTERM);
  pthread_sigmask(SIG_BLOCK, &sigs, NULL);
  fprintf(stderr, "start thread\n");
  sleep(3);
  fprintf(stderr, "stop thread\n");
  pthread_sigmask(SIG_UNBLOCK, &sigs, NULL);
}

void thread_signal(int signum)
{
  pthread_exit(0);
}

int main(int argc, char **argv)
{  
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = thread_signal;
  sa.sa_flags = 0;
  sigaction(SIGTERM, &sa, 0);
  
  pthread_t thread;
  pthread_create(&thread, NULL, thread_proc, NULL);
  sleep(1);
  fprintf(stderr, "kill thread\n");
  pthread_kill(thread, SIGTERM);
  fprintf(stderr, "join thread\n");
  pthread_join(thread, NULL);
  return 0;
}

This sample produce 'terminate called without an active exception' exception 
after pthread_exit(0).

For gcc 4.6, 4.4 its works fine. With -fno-exceptions flag its works. When i 
compile this as c code (gcc test.c -lpthread -o test) its works also fine.

Thanks.



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