diff options
| author | Mike Frysinger <vapier@gentoo.org> | 2006-11-09 08:07:43 +0000 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2006-11-09 08:07:43 +0000 |
| commit | f0d13fdd5d5f11847ce6d5b148e167e7999e075e (patch) | |
| tree | cb28f4b793f771dc39ce96ebf168714e92797058 /libpthread | |
| parent | 4776eaf3e312ab56e7fd2ab22b4e88f6f2dd10a4 (diff) | |
backport from upstream:
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.
Diffstat (limited to 'libpthread')
| -rw-r--r-- | libpthread/linuxthreads.old/cancel.c | 12 | ||||
| -rw-r--r-- | libpthread/linuxthreads.old/internals.h | 1 |
2 files changed, 13 insertions, 0 deletions
diff --git a/libpthread/linuxthreads.old/cancel.c b/libpthread/linuxthreads.old/cancel.c index f354c2a38..25b098dd5 100644 --- a/libpthread/linuxthreads.old/cancel.c +++ b/libpthread/linuxthreads.old/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) { @@ -128,6 +136,8 @@ 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); } @@ -147,6 +157,8 @@ 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); } diff --git a/libpthread/linuxthreads.old/internals.h b/libpthread/linuxthreads.old/internals.h index f1d5db16b..bd4d8ae13 100644 --- a/libpthread/linuxthreads.old/internals.h +++ b/libpthread/linuxthreads.old/internals.h @@ -24,6 +24,7 @@ #include <setjmp.h> #include <signal.h> #include <unistd.h> +#include <bits/stackinfo.h> #include <sys/types.h> #include <sys/wait.h> #include "pt-machine.h" |