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Message-Id: <20180106044443.14260-1-nenolod@dereferenced.org> Date: Sat, 6 Jan 2018 04:44:43 +0000 From: William Pitcock <nenolod@...eferenced.org> To: musl@...ts.openwall.com Cc: William Pitcock <nenolod@...eferenced.org> Subject: [PATCH] track pthread stack guard sizes some applications (rustc) are dependent on pthread_getattr_np() providing the guard size. --- src/internal/pthread_impl.h | 1 + src/thread/pthread_create.c | 1 + src/thread/pthread_getattr_np.c | 1 + 3 files changed, 3 insertions(+) diff --git a/src/internal/pthread_impl.h b/src/internal/pthread_impl.h index 56e19348..c2cafeaa 100644 --- a/src/internal/pthread_impl.h +++ b/src/internal/pthread_impl.h @@ -48,6 +48,7 @@ struct pthread { void *stdio_locks; uintptr_t canary_at_end; void **dtv_copy; + size_t guard_size; }; struct __timer { diff --git a/src/thread/pthread_create.c b/src/thread/pthread_create.c index 6cbf85b3..0faad765 100644 --- a/src/thread/pthread_create.c +++ b/src/thread/pthread_create.c @@ -265,6 +265,7 @@ int __pthread_create(pthread_t *restrict res, const pthread_attr_t *restrict att new->map_size = size; new->stack = stack; new->stack_size = stack - stack_limit; + new->guard_size = guard; new->start = entry; new->start_arg = arg; new->self = new; diff --git a/src/thread/pthread_getattr_np.c b/src/thread/pthread_getattr_np.c index ae26a5ab..29a209bd 100644 --- a/src/thread/pthread_getattr_np.c +++ b/src/thread/pthread_getattr_np.c @@ -7,6 +7,7 @@ int pthread_getattr_np(pthread_t t, pthread_attr_t *a) { *a = (pthread_attr_t){0}; a->_a_detach = !!t->detached; + a->_a_guardsize = t->guard_size; if (t->stack) { a->_a_stackaddr = (uintptr_t)t->stack; a->_a_stacksize = t->stack_size; -- 2.15.0
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