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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - TSan: flaky test race_on_mutex.c"
href="https://llvm.org/bugs/show_bug.cgi?id=25697">25697</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>TSan: flaky test race_on_mutex.c
</td>
</tr>
<tr>
<th>Product</th>
<td>compiler-rt
</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>compiler-rt
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>aizatsky@chromium.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Sanitizer build bot fails from time to time because of the race_on_mutex test.
I believe I saw this failure more than once.
Sample failure:
FAIL: ThreadSanitizer :: race_on_mutex.c (133 of 281)
******************** TEST 'ThreadSanitizer :: race_on_mutex.c' FAILED
********************
Script:
--
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm_build64/./bin/clang
-fsanitize=thread -Wall -m64 -gline-tables-only -O1
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/test/tsan/race_on_mutex.c
-o
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm_build64/tools/clang/runtime/compiler-rt-bins/test/tsan/Output/race_on_mutex.c.tmp
&&
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/test/tsan/deflake.bash
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm_build64/tools/clang/runtime/compiler-rt-bins/test/tsan/Output/race_on_mutex.c.tmp
| FileCheck
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/test/tsan/race_on_mutex.c
--
Exit Code: 1
Command Output (stderr):
--
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/test/tsan/race_on_mutex.c:40:16:
error: expected string not found in input
// CHECK-NEXT: #0 pthread_mutex_init {{.*}} ({{.*}})
^
<stdin>:8:2: note: scanning from here
[failed to restore the stack]
^
<stdin>:13:2: note: possible intended match here
#0 pthread_create
/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/lib/tsan/rtl/tsan_interceptors.cc:910:3
(race_on_mutex.c.tmp+0x000000428d91)
^
--
********************
Testing: 0 .. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..
Testing Time: 12.09s
********************
Failing Tests (1):
ThreadSanitizer :: race_on_mutex.c
(<a href="http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux/builds/21494/steps/run%2064-bit%20tsan%20unit%20tests/logs/stdio">http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux/builds/21494/steps/run%2064-bit%20tsan%20unit%20tests/logs/stdio</a>)</pre>
</div>
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