Re: [Boost-users] pthread_exit() from boost::thread segfaults

Subject: Re: [Boost-users] pthread_exit() from boost::thread segfaults
From: Peter Dimov (pdimov_at_[hidden])
Date: 2010-12-21 10:38:22

Viatcheslav.Sysoltsev wrote:
...
> void tf()
> {
>      printf("thread\n");
>      sleep(1);
>      pthread_exit(NULL);
> }

pthread_exit in glibc/NPTL causes a "forced unwind" that is almost like a 
C++ exception, but not quite. (And its semantics probably have changed since 
last I looked.) Either way, a catch(...) clause that calls terminate(), as 
in the earlier version of Boost, or no catch clause at all, as in the later 
ones, should cause exactly the behavior you describe. Moving the cleanup 
code into a destructor should work on Linux. It won't on Mac OS X, for 
example, where pthread_exit unwinds without calling C++ destructors, as far 
as I know. But then you'd have other problems too. :-)