tsan: refactor storage of meta information for heap blocks and sync objects

The new storage (MetaMap) is based on direct shadow (instead of a hashmap + per-block lists).
This solves a number of problems:
 - eliminates quadratic behaviour in SyncTab::GetAndLock (https://code.google.com/p/thread-sanitizer/issues/detail?id=26)
 - eliminates contention in SyncTab
 - eliminates contention in internal allocator during allocation of sync objects
 - removes a bunch of ad-hoc code in java interface
 - reduces java shadow from 2x to 1/2x
 - allows to memorize heap block meta info for Java and Go
 - allows to cleanup sync object meta info for Go
 - which in turn enabled deadlock detector for Go




git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@209810 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 5 deletions

diff --git a/test/tsan/mutexset7.cc b/test/tsan/mutexset7.cc
index a8a907a88..b80eddb08 100644
--- a/test/tsan/mutexset7.cc
+++ b/test/tsan/mutexset7.cc
@@ -13,12 +13,13 @@ void *Thread1(void *x) {
 }
 
 void *Thread2(void *x) {
-  pthread_mutex_t mtx;
-  pthread_mutex_init(&mtx, 0);
-  pthread_mutex_lock(&mtx);
+  pthread_mutex_t *mtx = new pthread_mutex_t;
+  pthread_mutex_init(mtx, 0);
+  pthread_mutex_lock(mtx);
   Global--;
-  pthread_mutex_unlock(&mtx);
-  pthread_mutex_destroy(&mtx);
+  pthread_mutex_unlock(mtx);
+  pthread_mutex_destroy(mtx);
+  delete mtx;
   return NULL;
 }