mirrors
/
musl
mirror of https://git.musl-libc.org/git/musl
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

prevent code from running under a thread id which already gave ESRCH

This commit is contained in:
Rich Felker 2013-04-26 17:51:22 -04:00
parent 47d2bf5103
commit d674f8582a
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/thread/pthread_create.c
View File

@ -30,7 +30,6 @@ _Noreturn void pthread_exit(void *result)
/* Mark this thread dead before decrementing count */
__lock(self->killlock);
self->dead = 1;
__unlock(self->killlock);
/* Block all signals before decrementing the live thread count.
* This is important to ensure that dynamically allocated TLS
@ -38,6 +37,13 @@ _Noreturn void pthread_exit(void *result)
* reasons as well. */
__syscall(SYS_rt_sigprocmask, SIG_BLOCK, SIGALL_SET, &set, _NSIG/8);
/* Wait to unlock the kill lock, which governs functions like
* pthread_kill which target a thread id, until signals have
* been blocked. This precludes observation of the thread id
* as a live thread (with application code running in it) after
* the thread was reported dead by ESRCH being returned. */
__unlock(self->killlock);
/* It's impossible to determine whether this is "the last thread"
* until performing the atomic decrement, since multiple threads
* could exit at the same time. For the last thread, revert the