pthread_cond_wait may return spuriously#4271
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tautschnig merged 2 commits intodiffblue:developfrom Feb 25, 2019
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Is there a test case for this? |
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Test added. |
kroening
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This PR failed Diffblue compatibility checks (cbmc commit: 38720d9).
Build URL: https://travis-ci.com/diffblue/test-gen/builds/102156901
Status will be re-evaluated on next push.
Please contact @peterschrammel, @thk123, or @allredj for support.
Common spurious failures:
- the cbmc commit has disappeared in the mean time (e.g. in a force-push)
- the author is not in the list of contributors (e.g. first-time contributors).
The incompatibility may have been introduced by an earlier PR. In that case merging this
PR should be avoided unless it fixes the current incompatibility.
These will never work on Windows, which doesn't have POSIX threads.
The man page states: "In general, whenever a condition wait returns, the thread has to re-evaluate the predicate associated with the condition wait to determine whether it can safely proceed, should wait again, or should declare a timeout. A return from the wait does not imply that the associated predicate is either true or false." The regression test is based on pthread-divine/condvar_spurious_wakeup_false-unreach-call.c from SV-COMP.
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Passed Diffblue compatibility checks (cbmc commit: 4c6a9fc).
Build URL: https://travis-ci.com/diffblue/test-gen/builds/102207363
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The man page states: "In general, whenever a condition wait returns, the thread
has to re-evaluate the predicate associated with the condition wait to determine
whether it can safely proceed, should wait again, or should declare a timeout. A
return from the wait does not imply that the associated predicate is either true
or false."