28 lines
1.2 KiB
Plaintext
28 lines
1.2 KiB
Plaintext
PURPOSE of /tools/glibc/Regression/bz580498-pthread-rwlock-timedwrlock-rdlock-never-return
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Description: Test for bz580498 (pthread_rwlock_timedwrlock/rdlock() never return)
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Author: Miroslav Franc <mfranc@redhat.com>
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Bug summary: pthread_rwlock_timedwrlock/rdlock() never return
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Bugzilla link: https://bugzilla.redhat.com/show_bug.cgi?id=580498
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Description:
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Different behavior between RHEL5 and RHEL6 in both pthread_rwlock_timedwrlock()
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and pthread_rwlock_timedrdlock() functions.
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If you call one of them with setting a negative number to abs_timeout->tv_sec,
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and a write lock to the specified rwlock has already been acquired by a different thread:
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RHEL 5) the function returns with ETIMEDOUT errno, but
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RHEL 6) the function never return (spinning).
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According to the man page and specs, EINVAL should be the return value on a negative timespec.
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EINVAL The value specified by rwlock does not refer to an initialized
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read-write lock object, or the abs_timeout nanosecond value is
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less than zero or greater than or equal to 1000 million.
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Apparently this change caused the issue:
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http://sourceware.org/ml/glibc-cvs/2009-q3/msg00036.html
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