Use a generic way to back threads out of wait queues when handling

signals instead of having more intricate knowledge of thread state
within signal handling.

Simplify signal code because of above (by David Xu).

Use macros for libpthread usage of pthread_cleanup_push() and
pthread_cleanup_pop().  This removes some instances of malloc()
and free() from the semaphore and pthread_once() implementations.

When single threaded and forking(), make sure that the current
thread's signal mask is inherited by the forked thread.

Use private mutexes for libc and libpthread.  Signals are
deferred while threads hold private mutexes.  This fix also
breaks www/linuxpluginwrapper; a patch that fixes it is at
http://people.freebsd.org/~deischen/kse/linuxpluginwrapper.diff

Fix race condition in condition variables where handling a
signal (pthread_kill() or kill()) may not see a wakeup
(pthread_cond_signal() or pthread_cond_broadcast()).

In collaboration with:	davidxu

1 files changed, 1 insertions, 3 deletions

diff --git a/lib/libpthread/thread/thr_create.c b/lib/libpthread/thread/thr_create.c
index 03f467b..08b2c47 100644
--- a/lib/libpthread/thread/thr_create.c
+++ b/lib/libpthread/thread/thr_create.c
@@ -171,9 +171,6 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
 			/* No thread is wanting to join to this one: */
 			new_thread->joiner = NULL;
 
-			/* Initialize the signal frame: */
-			new_thread->curframe = NULL;
-
 			/*
 			 * Initialize the machine context.
 			 * Enter a critical region to get consistent context.
@@ -235,6 +232,7 @@ _pthread_create(pthread_t * thread, const pthread_attr_t * attr,
 			new_thread->cleanup = NULL;
 			new_thread->flags = 0;
 			new_thread->tlflags = 0;
+			new_thread->sigbackout = NULL;
 			new_thread->continuation = NULL;
 			new_thread->wakeup_time.tv_sec = -1;
 			new_thread->lock_switch = 0;