Fixes for signal handling:

  o Don't call signal handlers with the signal handler access lock
    held.
  o Remove pending signals before calling signal handlers.  If
    pending signals were not removed prior to handling them,
    invocation of the handler could cause the handler to be
    called more than once for the same signal.  Found by: JB
  o When SIGCHLD arrives, wake up all threads in PS_WAIT_WAIT
    (wait4).

PR:		bin/15328
Reviewed by:	jasone

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/libpthread/thread/thr_private.h b/lib/libpthread/thread/thr_private.h
index 70c7487..4326bf6 100644
--- a/lib/libpthread/thread/thr_private.h
+++ b/lib/libpthread/thread/thr_private.h
@@ -984,8 +984,10 @@ void    _thread_kern_set_timeout(struct timespec *);
 void    _thread_kern_sig_defer(void);
 void    _thread_kern_sig_undefer(void);
 void    _thread_sig_handler(int, int, ucontext_t *);
-void    _thread_sig_handle(int, ucontext_t *);
+pthread_t _thread_sig_handle(int, ucontext_t *);
 void	_thread_sig_init(void);
+void	_thread_sig_send(pthread_t pthread, int sig);
+void	_thread_sig_deliver(pthread_t pthread, int sig);
 void    _thread_start(void);
 void    _thread_start_sig_handler(void);
 void	_thread_seterrno(pthread_t,int);