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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2018-05-10 17:24:56 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2019-01-03 18:38:16 -0200
commitce7eb0e90315eb1939ac29f656d39b3db858c092 (patch)
tree66f46e348749230c9fb9c95e7d77b01eff8598c9 /nptl
parent0b13e25581afb4ce95373f18249b91c104280a13 (diff)
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nptl: Cleanup cancellation macros
This patch wraps all uses of *_{enable,disable}_asynccancel and and *_CANCEL_{ASYNC,RESET} in either already provided macros (lll_futex_timed_wait_cancel) or creates new ones if the functionality is not provided (SYSCALL_CANCEL_NCS, lll_futex_wait_cancel, and lll_futex_timed_wait_cancel). Also for some generic implementations, the direct call of the macros are removed since the underlying symbols are suppose to provide cancellation support. This is a priliminary patch intended to simplify the work required for BZ#12683 fix. It is a refactor change, no semantic changes are expected. Checked on x86_64-linux-gnu and i686-linux-gnu. * nptl/pthread_join_common.c (__pthread_timedjoin_ex): Use lll_wait_tid with timeout. * nptl/sem_wait.c (__old_sem_wait): Use lll_futex_wait_cancel. * sysdeps/nptl/aio_misc.h (AIO_MISC_WAIT): Use futex_reltimed_wait_cancelable for cancelabla mode. * sysdeps/nptl/gai_misc.h (GAI_MISC_WAIT): Likewise. * sysdeps/posix/open64.c (__libc_open64): Do not call cancelation macros. * sysdeps/posix/sigwait.c (__sigwait): Likewise. * sysdeps/posix/waitid.c (__sigwait): Likewise. * sysdeps/unix/sysdep.h (__SYSCALL_CANCEL_CALL, SYSCALL_CANCEL_NCS): New macro. * sysdeps/nptl/lowlevellock.h (lll_wait_tid): Add timeout argument. (lll_timedwait_tid): Remove macro. * sysdeps/unix/sysv/linux/i386/lowlevellock.h (lll_wait_tid): Likewise. (lll_timedwait_tid): Likewise. * sysdeps/unix/sysv/linux/sparc/lowlevellock.h (lll_wait_tid): Likewise. (lll_timedwait_tid): Likewise. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.h (lll_wait_tid): Likewise. (lll_timedwait_tid): Likewise. * sysdeps/unix/sysv/linux/clock_nanosleep.c (__clock_nanosleep): Use INTERNAL_SYSCALL_CANCEL. * sysdeps/unix/sysv/linux/futex-internal.h (futex_reltimed_wait_cancelable): Use LIBC_CANCEL_{ASYNC,RESET} instead of __pthread_{enable,disable}_asynccancel. * sysdeps/unix/sysv/linux/lowlevellock-futex.h (lll_futex_wait_cancel): New macro.
Diffstat (limited to 'nptl')
-rw-r--r--nptl/pthread_join_common.c9
-rw-r--r--nptl/sem_wait.c8
2 files changed, 2 insertions, 15 deletions
diff --git a/nptl/pthread_join_common.c b/nptl/pthread_join_common.c
index 260fed4cfb..ecb78ffba5 100644
--- a/nptl/pthread_join_common.c
+++ b/nptl/pthread_join_common.c
@@ -81,14 +81,7 @@ __pthread_timedjoin_ex (pthread_t threadid, void **thread_return,
un-wait-ed for again. */
pthread_cleanup_push (cleanup, &pd->joinid);
- int oldtype = CANCEL_ASYNC ();
-
- if (abstime != NULL)
- result = lll_timedwait_tid (pd->tid, abstime);
- else
- lll_wait_tid (pd->tid);
-
- CANCEL_RESET (oldtype);
+ result = lll_wait_tid (pd->tid, abstime);
pthread_cleanup_pop (0);
}
diff --git a/nptl/sem_wait.c b/nptl/sem_wait.c
index 61bdd9bf4f..6a2d26bd1a 100644
--- a/nptl/sem_wait.c
+++ b/nptl/sem_wait.c
@@ -56,14 +56,8 @@ __old_sem_wait (sem_t *sem)
if (atomic_decrement_if_positive (futex) > 0)
return 0;
- /* Enable asynchronous cancellation. Required by the standard. */
- int oldtype = __pthread_enable_asynccancel ();
-
/* Always assume the semaphore is shared. */
- err = lll_futex_wait (futex, 0, LLL_SHARED);
-
- /* Disable asynchronous cancellation. */
- __pthread_disable_asynccancel (oldtype);
+ err = lll_futex_wait_cancel (futex, 0, LLL_SHARED);
}
while (err == 0 || err == -EWOULDBLOCK);