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Problem Report 2537 Details

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Report 2537 Actions Problem Report Number 2537 Submitter's Classification Test Suite problem State Resolved Resolution Rejected (REJ) Problem Resolution ID REJ.X.0681 Raised 2007-11-29 00:50 Updated 2007-12-05 22:43 Published 2007-12-05 22:43 Product Standard Internationalised System Calls and Libraries Extended V3 (UNIX 03) Certification Program The Open Brand certification program Test Suite VSART version 1.1.7 Test Identification POSIX_art.os/synchobjects_rwlocks/pthread_rwlock_rdlock 12 POSIX_art.os/synchobjects_rwlocks/pthread_rwlock_tryrdlock 11 Specification Base Definitions Issue 6 Location in Spec Line 2191-2192 of the combined PDF SUVs3_TC2 standard. Problem Summary Improper expectation that PTHREAD_SCOPE_PROCESS is supported on system supporting _POSIX_THREAD_PRIORITY_SCHEDULING. Problem Text After correcting the following problem in the vrtxlib, it can be seen that vrtx_pthread_create() is failing with an EPERM error. Line 268 in SRC/common/vrtxlib/thrdsafe.c is in_rpt("vrtx_pthread_create[%d] failed, error ", cnt, rval); should be in_rpt("vrtx_pthread_create[%d] failed, error: %d ", cnt, rval); According to SUSv3 an EPERM error must be returned as follows: ERRORS The pthread_create( ) function shall fail if: [EPERM] The caller does not have appropriate permission to set the required scheduling parameters or scheduling policy. Looking at the failing tests, the following attributes are being set in the VRTX library function vrtx_pthread_create() for the thread: PTHREAD_CREATE_JOINABLE SCHED_RR PTHREAD_EXPLICIT_SCHED PTHREAD_SCOPE_PROCESS The EPERM error is the result of trying to create the thread with PTHREAD_SCOPE_PROCESS contention scope. PTHREAD_SCOPE_PROCESS is not required to be supported by a UNIX03 conforming system. The SUSv3 Standard states the following ? Conforming implementations shall support the PTHREAD_SCOPE_PROCESS scheduling contention scope, the PTHREAD_SCOPE_SYSTEM scheduling contention scope, or both. The pthread_attr_setscope() call is protected by checks on the support for_POSIX_THREAD_PRIORITY_SCHEDULING. I have reviewed the standard for any links between PTHREAD_SCOPE_PROCESS and _POSIX_THREAD_PRIORITY_SCHEDULING and found none. The VRTX library is in error for assuming PTHREAD_SCOPE_PROCESS is supported on all systems supporting _POSIX_THREAD_PRIORITY_SCHEDULING. I have opened this against VSART, but this is causing failures in the VSTH Test Suite too. Test Output ************************************************************************ /tset/POSIX_art.os/synchobjects_rwlocks/pthread_rwlock_rdlock/T.pthread_ rwlock_rdlock 12 Unresolved Test Description: If {_POSIX_READER_WRITER_LOCKS} is defined: pthread_rwlock_rdlock(lock) is thread safe. Test Information: vrtx_pthread_create[0] failed, error vrtx_pthread_create[1] failed, error vrtx_pthread_create[2] failed, error vrtx_pthread_create[3] failed, error vrtx_pthread_create[4] failed, error vrtx_pthread_create[5] failed, error vrtx_pthread_create[6] failed, error vrtx_pthread_create[7] failed, error vrtx_pthread_create[8] failed, error vrtx_pthread_create[9] failed, error vrtx_pthread_create[10] failed, error vrtx_pthread_create[11] failed, error vrtx_pthread_create[12] failed, error vrtx_pthread_create[13] failed, error vrtx_pthread_create[14] failed, error vrtx_pthread_create[15] failed, error vrtx_pthread_join[0] failed, error 3 vrtx_pthread_join[1] failed, error 3 vrtx_pthread_join[2] failed, error 3 vrtx_pthread_join[3] failed, error 3 vrtx_pthread_join[4] failed, error 3 vrtx_pthread_join[5] failed, error 3 vrtx_pthread_join[6] failed, error 3 vrtx_pthread_join[7] failed, error 3 vrtx_pthread_join[8] failed, error 3 vrtx_pthread_join[9] failed, error 3 vrtx_pthread_join[10] failed, error 3 vrtx_pthread_join[11] failed, error 3 vrtx_pthread_join[12] failed, error 3 vrtx_pthread_join[13] failed, error 3 vrtx_pthread_join[14] failed, error 3 vrtx_pthread_join[15] failed, error 3 ************************************************************************ ************************************************************************ /tset/POSIX_art.os/synchobjects_rwlocks/pthread_rwlock_tryrdlock/T.pthre ad_rwlock_tryrdlock 11 Unresolved Test Description: If {_POSIX_READER_WRITER_LOCKS} is defined: pthread_rwlock_tryrdlock(lock) is thread safe. Test Information: vrtx_pthread_create[0] failed, error vrtx_pthread_create[1] failed, error vrtx_pthread_create[2] failed, error vrtx_pthread_create[3] failed, error vrtx_pthread_create[4] failed, error vrtx_pthread_create[5] failed, error vrtx_pthread_create[6] failed, error vrtx_pthread_create[7] failed, error vrtx_pthread_create[8] failed, error vrtx_pthread_create[9] failed, error vrtx_pthread_create[10] failed, error vrtx_pthread_create[11] failed, error vrtx_pthread_create[12] failed, error vrtx_pthread_create[13] failed, error vrtx_pthread_create[14] failed, error vrtx_pthread_create[15] failed, error vrtx_pthread_join[0] failed, error 3 vrtx_pthread_join[1] failed, error 3 vrtx_pthread_join[2] failed, error 3 vrtx_pthread_join[3] failed, error 3 vrtx_pthread_join[4] failed, error 3 vrtx_pthread_join[5] failed, error 3 vrtx_pthread_join[6] failed, error 3 vrtx_pthread_join[7] failed, error 3 vrtx_pthread_join[8] failed, error 3 vrtx_pthread_join[9] failed, error 3 vrtx_pthread_join[10] failed, error 3 vrtx_pthread_join[11] failed, error 3 vrtx_pthread_join[12] failed, error 3 vrtx_pthread_join[13] failed, error 3 vrtx_pthread_join[14] failed, error 3 vrtx_pthread_join[15] failed, error 3 ************************************************************************ ************************************************************************ /tset/POSIX_art.os/synchobjects_rwlocks/pthread_rwlock_trywrlock/T.pthre ad_rwlock_trywrlock 9 Unresolved Test Description: If {_POSIX_READER_WRITER_LOCKS} is defined: pthread_rwlock_trywrlock(lock) is thread safe. Test Information: vrtx_pthread_create[0] failed, error vrtx_pthread_create[1] failed, error vrtx_pthread_create[2] failed, error vrtx_pthread_create[3] failed, error vrtx_pthread_create[4] failed, error vrtx_pthread_create[5] failed, error vrtx_pthread_create[6] failed, error vrtx_pthread_create[7] failed, error vrtx_pthread_create[8] failed, error vrtx_pthread_create[9] failed, error vrtx_pthread_create[10] failed, error vrtx_pthread_create[11] failed, error vrtx_pthread_create[12] failed, error vrtx_pthread_create[13] failed, error vrtx_pthread_create[14] failed, error vrtx_pthread_create[15] failed, error vrtx_pthread_join[0] failed, error 3 vrtx_pthread_join[1] failed, error 3 vrtx_pthread_join[2] failed, error 3 vrtx_pthread_join[3] failed, error 3 vrtx_pthread_join[4] failed, error 3 vrtx_pthread_join[5] failed, error 3 vrtx_pthread_join[6] failed, error 3 vrtx_pthread_join[7] failed, error 3 vrtx_pthread_join[8] failed, error 3 vrtx_pthread_join[9] failed, error 3 vrtx_pthread_join[10] failed, error 3 vrtx_pthread_join[11] failed, error 3 vrtx_pthread_join[12] failed, error 3 vrtx_pthread_join[13] failed, error 3 vrtx_pthread_join[14] failed, error 3 vrtx_pthread_join[15] failed, error 3 ************************************************************************ ************************************************************************ /tset/POSIX_art.os/synchobjects_rwlocks/pthread_rwlock_unlock/T.pthread_ rwlock_unlock 9 Unresolved Test Description: If {_POSIX_READER_WRITER_LOCKS} is defined: pthread_rwlock_unlock(lock) is thread safe. Test Information: vrtx_pthread_create[0] failed, error vrtx_pthread_create[1] failed, error vrtx_pthread_create[2] failed, error vrtx_pthread_create[3] failed, error vrtx_pthread_create[4] failed, error vrtx_pthread_create[5] failed, error vrtx_pthread_create[6] failed, error vrtx_pthread_create[7] failed, error vrtx_pthread_create[8] failed, error vrtx_pthread_create[9] failed, error vrtx_pthread_create[10] failed, error vrtx_pthread_create[11] failed, error vrtx_pthread_create[12] failed, error vrtx_pthread_create[13] failed, error vrtx_pthread_create[14] failed, error vrtx_pthread_create[15] failed, error vrtx_pthread_join[0] failed, error 3 vrtx_pthread_join[1] failed, error 3 vrtx_pthread_join[2] failed, error 3 vrtx_pthread_join[3] failed, error 3 vrtx_pthread_join[4] failed, error 3 vrtx_pthread_join[5] failed, error 3 vrtx_pthread_join[6] failed, error 3 vrtx_pthread_join[7] failed, error 3 vrtx_pthread_join[8] failed, error 3 vrtx_pthread_join[9] failed, error 3 vrtx_pthread_join[10] failed, error 3 vrtx_pthread_join[11] failed, error 3 vrtx_pthread_join[12] failed, error 3 vrtx_pthread_join[13] failed, error 3 vrtx_pthread_join[14] failed, error 3 vrtx_pthread_join[15] failed, error 3 ************************************************************************ ************************************************************************ **************************************************** /tset/POSIX_art.os/synchobjects_rwlocks/pthread_rwlock_wrlock/T.pthread_ rwlock_wrlock 8 Unresolved Test Description: If {_POSIX_READER_WRITER_LOCKS} is defined: pthread_rwlock_wrlock(lock) is thread safe. Test Information: vrtx_pthread_create[0] failed, error vrtx_pthread_create[1] failed, error vrtx_pthread_create[2] failed, error vrtx_pthread_create[3] failed, error vrtx_pthread_create[4] failed, error vrtx_pthread_create[5] failed, error vrtx_pthread_create[6] failed, error vrtx_pthread_create[7] failed, error vrtx_pthread_create[8] failed, error vrtx_pthread_create[9] failed, error vrtx_pthread_create[10] failed, error vrtx_pthread_create[11] failed, error vrtx_pthread_create[12] failed, error vrtx_pthread_create[13] failed, error vrtx_pthread_create[14] failed, error vrtx_pthread_create[15] failed, error vrtx_pthread_join[0] failed, error 3 vrtx_pthread_join[1] failed, error 3 vrtx_pthread_join[2] failed, error 3 vrtx_pthread_join[3] failed, error 3 vrtx_pthread_join[4] failed, error 3 vrtx_pthread_join[5] failed, error 3 vrtx_pthread_join[6] failed, error 3 vrtx_pthread_join[7] failed, error 3 vrtx_pthread_join[8] failed, error 3 vrtx_pthread_join[9] failed, error 3 vrtx_pthread_join[10] failed, error 3 vrtx_pthread_join[11] failed, error 3 vrtx_pthread_join[12] failed, error 3 vrtx_pthread_join[13] failed, error 3 vrtx_pthread_join[14] failed, error 3 vrtx_pthread_join[15] failed, error 3 ************************************************************************ ************************************************************************ /tset/POSIX_art.os/synchobjects_rwlocks/pthread_rwlockattr_getpshared/T. pthread_rwlockattr_getpshared 4 Unresolved Test Description: If {_POSIX_READER_WRITER_LOCKS} and {_POSIX_THREAD_PROCESS_SHARED} are defined: pthread_rwlockattr_getpshared(attr, pshared) is thread safe. Test Information: vrtx_pthread_create[0] failed, error vrtx_pthread_create[1] failed, error vrtx_pthread_create[2] failed, error vrtx_pthread_create[3] failed, error vrtx_pthread_create[4] failed, error vrtx_pthread_create[5] failed, error vrtx_pthread_create[6] failed, error vrtx_pthread_create[7] failed, error vrtx_pthread_create[8] failed, error vrtx_pthread_create[9] failed, error vrtx_pthread_create[10] failed, error vrtx_pthread_create[11] failed, error vrtx_pthread_create[12] failed, error vrtx_pthread_create[13] failed, error vrtx_pthread_create[14] failed, error vrtx_pthread_create[15] failed, error vrtx_pthread_join[0] failed, error 3 vrtx_pthread_join[1] failed, error 3 vrtx_pthread_join[2] failed, error 3 vrtx_pthread_join[3] failed, error 3 vrtx_pthread_join[4] failed, error 3 vrtx_pthread_join[5] failed, error 3 vrtx_pthread_join[6] failed, error 3 vrtx_pthread_join[7] failed, error 3 vrtx_pthread_join[8] failed, error 3 vrtx_pthread_join[9] failed, error 3 vrtx_pthread_join[10] failed, error 3 vrtx_pthread_join[11] failed, error 3 vrtx_pthread_join[12] failed, error 3 vrtx_pthread_join[13] failed, error 3 vrtx_pthread_join[14] failed, error 3 vrtx_pthread_join[15] failed, error 3 ************************************************************************ ************************************************************************ **************************************************** /tset/POSIX_art.os/synchobjects_rwlocks/pthread_rwlockattr_setpshared/T. pthread_rwlockattr_setpshared 7 Unresolved Test Description: If {_POSIX_READER_WRITER_LOCKS} and {_POSIX_THREAD_PROCESS_SHARED} are defined: pthread_rwlockattr_setpshared(attr, pshared) is thread safe. Test Information: vrtx_pthread_create[0] failed, error vrtx_pthread_create[1] failed, error vrtx_pthread_create[2] failed, error vrtx_pthread_create[3] failed, error vrtx_pthread_create[4] failed, error vrtx_pthread_create[5] failed, error vrtx_pthread_create[6] failed, error vrtx_pthread_create[7] failed, error vrtx_pthread_create[8] failed, error vrtx_pthread_create[9] failed, error vrtx_pthread_create[10] failed, error vrtx_pthread_create[11] failed, error vrtx_pthread_create[12] failed, error vrtx_pthread_create[13] failed, error vrtx_pthread_create[14] failed, error vrtx_pthread_create[15] failed, error vrtx_pthread_join[0] failed, error 3 vrtx_pthread_join[1] failed, error 3 vrtx_pthread_join[2] failed, error 3 vrtx_pthread_join[3] failed, error 3 vrtx_pthread_join[4] failed, error 3 vrtx_pthread_join[5] failed, error 3 vrtx_pthread_join[6] failed, error 3 vrtx_pthread_join[7] failed, error 3 vrtx_pthread_join[8] failed, error 3 vrtx_pthread_join[9] failed, error 3 vrtx_pthread_join[10] failed, error 3 vrtx_pthread_join[11] failed, error 3 vrtx_pthread_join[12] failed, error 3 vrtx_pthread_join[13] failed, error 3 vrtx_pthread_join[14] failed, error 3 vrtx_pthread_join[15] failed, error 3 ************************************************************************ Review Information Review Type TSMA Review Start Date 2007-11-29 00:50 Last Updated 2007-12-04 18:49 Completed 2007-12-04 18:49 Status Complete Review Recommendation Rejected (REJ) Review Response Agree with the recommendation from VSTH support team, thus suggest the request is refused based on the following grounds: The vrtx_threadsafe_test() library function allows for an ENOTSUP return from pthread_attr_setscope(), which indicates that PTHREAD_SCOPE_PROCESS is not supported. Unfortunately in XSH6 this error is listed as "may fail". This is considered to be a mistake in the standard, and a defect report has been sent to the Austin Group asking for it to be changed to "shall fail". (The ENOTSUP error needs to be "shall fail" otherwise applications have no portable way of determining whether PTHREAD_SCOPE_PROCESS is supported.) Despite the allowance in the current standard for pthread_attr_setscope() to succeed when PTHREAD_SCOPE_PROCESS is not supported, the implementation still does not conform. It is returning an EPERM error from pthread_create(), but this error relates to "scheduling parameters or scheduling policy", not to contention scope. The contention scope is a scheduling "attribute", but it is not a scheduling parameter (set using pthread_attr_setschedparam()) or a scheduling policy (set using pthread_attr_setschedpolicy()). The submitter is strongly encouraged to change the implementation so that pthread_attr_setscope() returns ENOTSUP to indicate that PTHREAD_SCOPE_PROCESS is not supported. An alternative way to make the implementation conform would be to have pthread_create() return a different error number (one not listed on the pthread_create() page in the standard) instead of EPERM, but this would not conform to the next revision of the standard, assuming that the Austin Group makes the requested change. Review Type SA Review Start Date 2007-12-04 18:49 Last Updated 2007-12-05 00:59 Completed 2007-12-05 00:59 Status Complete Review Resolution Rejected (REJ) Review Conclusion Though we believe there may be a standards interpretation issue in this area, we do not believe this is the direct cause of the non pass result in this case. This PR is thus rejected as a Test Suite deficiency Problem Reporting System Options: View Report 2537 List All PRs Search Reports Email the System Administrator View the The Open Brand Interpretations Database User Manual
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