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authorStas Sergeev <stsp@users.sourceforge.net>2012-06-13 23:00:02 (GMT)
committerCarmelo Amoroso <carmelo.amoroso@st.com>2012-06-19 07:42:31 (GMT)
commit0dcc13bf7a61b1d0708e5dd103d5515e0ffec79a (patch)
tree4e19056b3b5e3d0895f1b6b1b2cd90965d3eaebd /libpthread/nptl/sysdeps/unix/sysv/linux/sh
parent6c67ceaeed2f28b2caa4a5638304d260c8091c42 (diff)
nptl: sh: fix race condition in lll_wait_tid
Make a local copy of the tid value to avoid a race condition, as the value could have been changed to 0, thus using a pointer it would have been passed to the lll_futex_wait modified. Signed-off-by: Stas Sergeev <stsp@users.sourceforge.net> Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/sh')
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h
index d10cd61..b83d863 100644
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h
@@ -396,9 +396,9 @@ extern int __lll_unlock_wake (int *__futex, int private) attribute_hidden;
#define lll_wait_tid(tid) \
do { \
- __typeof (tid) *__tid = &(tid); \
- while (*__tid != 0) \
- lll_futex_wait (__tid, *__tid, LLL_SHARED); \
+ __typeof (tid) __tid; \
+ while ((__tid = (tid)) != 0) \
+ lll_futex_wait (&(tid), __tid, LLL_SHARED); \
} while (0)
extern int __lll_timedwait_tid (int *tid, const struct timespec *abstime)