[TSan] Increase the limit of simultaniously held mutexes TSan can keep track of from 64 to 128

Author: gbMattN

compiler-rt/lib/sanitizer_common/sanitizer_deadlock_detector.h

@@ -120,7 +120,7 @@ class DeadlockDetectorTLS {
     u32 lock;
     u32 stk;
   };
-  LockWithContext all_locks_with_contexts_[64];
+  LockWithContext all_locks_with_contexts_[128];
   uptr n_all_locks_;
 };
 

compiler-rt/test/tsan/many_held_mutex.cpp

@@ -0,0 +1,23 @@
+// RUN: %clangxx_tsan %s -fsanitize=thread -o %t && %run %t 2>&1 | Filecheck %s
+
+#include <mutex>
+#include <stdio.h>
+
+int main(){
+    const unsigned short NUM_OF_MTX = 128;
+    std::mutex mutexes[NUM_OF_MTX];
+
+    for(int i = 0; i < NUM_OF_MTX; i++){
+        mutexes[i].lock();
+    }
+    for(int i = 0; i < NUM_OF_MTX; i++){
+        mutexes[i].unlock();
+    }
+
+    printf("Success\n");
+
+    return 0;
+}
+
+// CHECK: Success
+// CHECK-NOT: ThreadSanitizer: CHECK failed