commit e4eb5d7fa1f81229131f09162fbba51a81577809
author Brian Silverman <brians> Tue Apr 07 00:45:31 2015 -0400
committer Brian Silverman <brians> Mon Apr 13 02:09:06 2015 -0400
tree 8762c777ea0856158df45a14a3a8da41e70e3876
parent 89c609dfe73863c5448537c6ef9f2b72fab7d2f4

make tsan errors more useful

Change-Id: I7dc400f7b456fb74941e9e0b3b0bae44fbdfced2

aos/build/build.py

diff --git a/aos/build/build.py b/aos/build/build.py
index 5a3c544..725de33 100755
--- a/aos/build/build.py
+++ b/aos/build/build.py
@@ -455,6 +455,11 @@
         r['MSAN_SYMBOLIZER_PATH'] = SYMBOLIZER_PATH
       elif self.sanitizer() == 'thread':
         r['TSAN_OPTIONS'] = 'external_symbolizer_path=' + SYMBOLIZER_PATH
+        # This is apparently the default for newer versions, which disagrees
+        # with documentation, so just turn it on explicitly.
+        r['TSAN_OPTIONS'] += ':detect_deadlocks=1'
+        # Print more useful stacks for mutex locking order problems.
+        r['TSAN_OPTIONS'] += ':second_deadlock_stack=1'
 
       r['CCACHE_COMPRESS'] = 'yes'
       r['CCACHE_DIR'] = os.path.abspath(os.path.join(aos_path(), '..', 'output',