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authorUlrich Drepper <drepper@redhat.com>2001-04-11 21:29:54 +0000
committerUlrich Drepper <drepper@redhat.com>2001-04-11 21:29:54 +0000
commit95fe9d959f956c8b31a3bd8801ea9dfe475842a5 (patch)
treef12d85c19d5e186d8771e586d192b030efe0a641 /linuxthreads
parent8ee355155102ad7c2e473f179f4879c6e468f19e (diff)
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Update.
2001-04-11 Ulrich Drepper <drepper@redhat.com> * cancel.c (_pthread_cleanup_push): Catch invalid __prev buffer and remove it. (_pthread_cleanup_push_defer): Likewise. * tst-cancel.c (main): Fix loop printing cleanup output.
Diffstat (limited to 'linuxthreads')
-rw-r--r--linuxthreads/ChangeLog8
-rw-r--r--linuxthreads/cancel.c24
-rw-r--r--linuxthreads/tst-cancel.c2
3 files changed, 31 insertions, 3 deletions
diff --git a/linuxthreads/ChangeLog b/linuxthreads/ChangeLog
index 805e837af5..47c15c65cb 100644
--- a/linuxthreads/ChangeLog
+++ b/linuxthreads/ChangeLog
@@ -1,3 +1,11 @@
+2001-04-11 Ulrich Drepper <drepper@redhat.com>
+
+ * cancel.c (_pthread_cleanup_push): Catch invalid __prev buffer
+ and remove it.
+ (_pthread_cleanup_push_defer): Likewise.
+
+ * tst-cancel.c (main): Fix loop printing cleanup output.
+
2001-04-10 kaz Kojima <kkojima@rr.iij4u.or.jp>
* sysdeps/sh/pspinlock.c (__pthread_spin_lock): Fix a reverse
diff --git a/linuxthreads/cancel.c b/linuxthreads/cancel.c
index ed67a6845f..32ad17c838 100644
--- a/linuxthreads/cancel.c
+++ b/linuxthreads/cancel.c
@@ -125,6 +125,18 @@ 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)
+ {
+#if _STACK_GROWS_DOWN
+ if ((char *) buffer >= (char *) buffer->__prev)
+ buffer->__prev = NULL;
+#elif _STACK_GROWS_UP
+ if ((char *) buffer <= (char *) buffer->__prev)
+ buffer->__prev = NULL;
+#else
+# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
+#endif
+ }
THREAD_SETMEM(self, p_cleanup, buffer);
}
@@ -144,6 +156,16 @@ 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)
+ {
+#if _STACK_GROWS_DOWN
+ if ((char *) buffer >= (char *) buffer->__prev)
+ buffer->__prev = NULL;
+#elif _STACK_GROWS_UP
+ if ((char *) buffer <= (char *) buffer->__prev)
+ buffer->__prev = NULL;
+#endif
+ }
THREAD_SETMEM(self, p_canceltype, PTHREAD_CANCEL_DEFERRED);
THREAD_SETMEM(self, p_cleanup, buffer);
}
@@ -174,8 +196,6 @@ void __pthread_perform_cleanup(char *currentframe)
#elif _STACK_GROWS_UP
if ((char *) c >= currentframe)
break;
-#else
-# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
#endif
c->__routine(c->__arg);
}
diff --git a/linuxthreads/tst-cancel.c b/linuxthreads/tst-cancel.c
index da70d1278f..75d6c0de66 100644
--- a/linuxthreads/tst-cancel.c
+++ b/linuxthreads/tst-cancel.c
@@ -142,7 +142,7 @@ main (void)
while (1)
{
ssize_t n = read (fd, buf, sizeof buf);
- if (n < 0)
+ if (n <= 0)
break;
write (STDOUT_FILENO, buf, n);
}