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      <base href="http://llvm.org/bugs/" />

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    <body><table border="1" cellspacing="0" cellpadding="8">

        <tr>

          <th>Bug ID</th>

          <td><a class="bz_bug_link 

          bz_status_NEW "

   title="NEW --- - condition_variable tests delete condition_variable while it is being waited upon"

   href="http://llvm.org/bugs/show_bug.cgi?id=19041">19041</a>

          </td>

        </tr>

        <tr>

          <th>Summary</th>

          <td>condition_variable tests delete condition_variable while it is being waited upon

          </td>

        </tr>

        <tr>

          <th>Product</th>

          <td>libc++

          </td>

        </tr>

        <tr>

          <th>Version</th>

          <td>unspecified

          </td>

        </tr>

        <tr>

          <th>Hardware</th>

          <td>PC

          </td>

        </tr>

        <tr>

          <th>OS</th>

          <td>Linux

          </td>

        </tr>

        <tr>

          <th>Status</th>

          <td>NEW

          </td>

        </tr>

        <tr>

          <th>Severity</th>

          <td>normal

          </td>

        </tr>

        <tr>

          <th>Priority</th>

          <td>P

          </td>

        </tr>

        <tr>

          <th>Component</th>

          <td>All Bugs

          </td>

        </tr>

        <tr>

          <th>Assignee</th>

          <td>hhinnant@apple.com

          </td>

        </tr>

        <tr>

          <th>Reporter</th>

          <td>russell_gallop@sn.scee.net

          </td>

        </tr>

        <tr>

          <th>CC</th>

          <td>llvmbugs@cs.uiuc.edu, mclow.lists@gmail.com

          </td>

        </tr>

        <tr>

          <th>Classification</th>

          <td>Unclassified

          </td>

        </tr></table>

      <p>

        <div>

        <pre>Created <span class=""><a href="attachment.cgi?id=12183" name="attach_12183" title="Patch for tests">attachment 12183</a> <a href="attachment.cgi?id=12183&action=edit" title="Patch for tests">[details]</a></span>

Patch for tests

The tests:

thread/thread.condition/thread.condition.condvar/destructor.pass.cpp and

thread/thread.condition/thread.condition.condvarany/destructor.pass.cpp

 delete their condition variables while they are being waited on.

clang version 3.4

libcxx revision 202832

Ubuntu 12.10

This can be seen with the valgrind DRD tool (see below). It is fixed with the

attached patch (for both tests) which moves the delete to main(). It would also

be possible to rewrite the test so cv is not a pointer at all.

$ valgrind --tool=drd condvar

==14176== drd, a thread error detector

==14176== Using Valgrind-3.9.0 and LibVEX; rerun with -h for copyright info

==14176== Command: condvar

==14176==

==14176== Thread 3:

==14176== destruction of condition variable being waited upon: cond 0x60e4030

==14176==    at 0x4C332F2: pthread_cond_destroy@*

(drd_pthread_intercepts.c:719)

==14176==    by 0x400FA8: f() (destructor.pass.cpp:33)

==14176==    by 0x40189D: _ZNSt3__114__thread_proxyINS_5tupleIJPFvvEEEEEEPvS5_

(__functional_base:413)

==14176==    by 0x4C2EDA4: vgDrd_thread_wrapper (drd_pthread_intercepts.c:355)

==14176==    by 0x59C3E99: start_thread (pthread_create.c:308)

==14176==    by 0x56F03FC: clone (clone.S:112)

==14176== cond 0x60e4030 was first observed at:

==14176==    at 0x4C34042: pthread_cond_signal@* (drd_pthread_intercepts.c:778)

==14176==    by 0x401027: g() (destructor.pass.cpp:40)

==14176==    by 0x40189D: _ZNSt3__114__thread_proxyINS_5tupleIJPFvvEEEEEEPvS5_

(__functional_base:413)

==14176==    by 0x4C2EDA4: vgDrd_thread_wrapper (drd_pthread_intercepts.c:355)

==14176==    by 0x59C3E99: start_thread (pthread_create.c:308)

==14176==    by 0x56F03FC: clone (clone.S:112)

==14176==

==14176== Destroying condition variable that is being waited upon: cond

0x60e4030, mutex 0x6030f0 locked by thread 3

==14176==    at 0x4C332F2: pthread_cond_destroy@*

(drd_pthread_intercepts.c:719)

==14176==    by 0x400FA8: f() (destructor.pass.cpp:33)

==14176==    by 0x40189D: _ZNSt3__114__thread_proxyINS_5tupleIJPFvvEEEEEEPvS5_

(__functional_base:413)

==14176==    by 0x4C2EDA4: vgDrd_thread_wrapper (drd_pthread_intercepts.c:355)

==14176==    by 0x59C3E99: start_thread (pthread_create.c:308)

==14176==    by 0x56F03FC: clone (clone.S:112)

==14176== mutex 0x6030f0 was first observed at:

==14176==    at 0x4C3194E: pthread_mutex_lock (drd_pthread_intercepts.c:627)

==14176==    by 0x4EB4927: std::__1::mutex::lock() (mutex.cpp:30)

==14176==    by 0x401012: g() (__mutex_base:108)

==14176==    by 0x40189D: _ZNSt3__114__thread_proxyINS_5tupleIJPFvvEEEEEEPvS5_

(__functional_base:413)

==14176==    by 0x4C2EDA4: vgDrd_thread_wrapper (drd_pthread_intercepts.c:355)

==14176==    by 0x59C3E99: start_thread (pthread_create.c:308)

==14176==    by 0x56F03FC: clone (clone.S:112)

==14176==

==14176== Thread 2:

==14176== condition variable has been destroyed while being waited upon: cond

0x60e4030, mutex 0x0 locked by thread 0

==14176==    at 0x4C33793: pthread_cond_wait@* (drd_pthread_intercepts.c:736)

==14176==    by 0x4E82C79:

std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&)

(condition_variable.cpp:40)

==14176==    by 0x40104D: g() (destructor.pass.cpp:42)

==14176==    by 0x40189D: _ZNSt3__114__thread_proxyINS_5tupleIJPFvvEEEEEEPvS5_

(__functional_base:413)

==14176==    by 0x4C2EDA4: vgDrd_thread_wrapper (drd_pthread_intercepts.c:355)

==14176==    by 0x59C3E99: start_thread (pthread_create.c:308)

==14176==    by 0x56F03FC: clone (clone.S:112)

==14176==

==14176==

==14176== For counts of detected and suppressed errors, rerun with: -v

==14176== ERROR SUMMARY: 3 errors from 3 contexts (suppressed: 54 from 48)</pre>

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