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-rw-r--r--libpthread/linuxthreads/cancel.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/libpthread/linuxthreads/cancel.c b/libpthread/linuxthreads/cancel.c
index 1356348a7..c6b5f94f9 100644
--- a/libpthread/linuxthreads/cancel.c
+++ b/libpthread/linuxthreads/cancel.c
@@ -26,6 +26,14 @@
extern void __rpc_thread_destroy(void);
#endif
+#ifdef _STACK_GROWS_DOWN
+# define FRAME_LEFT(frame, other) ((char *) frame >= (char *) other)
+#elif _STACK_GROWS_UP
+# define FRAME_LEFT(frame, other) ((char *) frame <= (char *) other)
+#else
+# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
+#endif
+
int pthread_setcancelstate(int state, int * oldstate)
{
@@ -62,6 +70,7 @@ int pthread_cancel(pthread_t thread)
int dorestart = 0;
pthread_descr th;
pthread_extricate_if *pextricate;
+ int already_canceled;
__pthread_lock(&handle->h_lock, NULL);
if (invalid_handle(handle, thread)) {
@@ -71,7 +80,10 @@ int pthread_cancel(pthread_t thread)
th = handle->h_descr;
- if (th->p_canceled) {
+ already_canceled = th->p_canceled;
+ th->p_canceled = 1;
+
+ if (th->p_cancelstate == PTHREAD_CANCEL_DISABLE || already_canceled) {
__pthread_unlock(&handle->h_lock);
return 0;
}
@@ -125,6 +137,8 @@ void _pthread_cleanup_push(struct _pthread_cleanup_buffer * buffer,
buffer->__routine = routine;
buffer->__arg = arg;
buffer->__prev = THREAD_GETMEM(self, p_cleanup);
+ if (buffer->__prev != NULL && FRAME_LEFT (buffer, buffer->__prev))
+ buffer->__prev = NULL;
THREAD_SETMEM(self, p_cleanup, buffer);
}
@@ -144,6 +158,8 @@ void _pthread_cleanup_push_defer(struct _pthread_cleanup_buffer * buffer,
buffer->__arg = arg;
buffer->__canceltype = THREAD_GETMEM(self, p_canceltype);
buffer->__prev = THREAD_GETMEM(self, p_cleanup);
+ if (buffer->__prev != NULL && FRAME_LEFT (buffer, buffer->__prev))
+ buffer->__prev = NULL;
THREAD_SETMEM(self, p_canceltype, PTHREAD_CANCEL_DEFERRED);
THREAD_SETMEM(self, p_cleanup, buffer);
}