tsan: suport for Go finalizers

llvm-svn: 160723

compiler-rt/lib/tsan/go/tsan_go.cc

@@ -221,5 +221,10 @@ void __tsan_event(int typ, int tid, void *pc, void *addr, int info) {
   }
 }
 
+void __tsan_finalizer_goroutine(int tid) {
+  ThreadState *thr = goroutines[tid];
+  ThreadFinalizerGoroutine(thr);
+}
+
 }  // extern "C"
 }  // namespace __tsan

compiler-rt/lib/tsan/rtl/tsan_clock.cc

@@ -93,6 +93,11 @@ void ThreadClock::acq_rel(SyncClock *dst) {
   release(dst);
 }
 
+void ThreadClock::Disable() {
+  for (uptr i = 0; i < kMaxTidInClock; i++)
+    clk_[i] = (u64)-1;
+}
+
 SyncClock::SyncClock()
   : clk_(MBlockClock) {
 }

compiler-rt/lib/tsan/rtl/tsan_clock.h

@@ -61,6 +61,8 @@ struct ThreadClock {
       nclk_ = tid + 1;
   }
 
+  void Disable();
+
   uptr size() const {
     return nclk_;
   }

compiler-rt/lib/tsan/rtl/tsan_rtl.h

@@ -437,6 +437,7 @@ int ThreadTid(ThreadState *thr, uptr pc, uptr uid);
 void ThreadJoin(ThreadState *thr, uptr pc, int tid);
 void ThreadDetach(ThreadState *thr, uptr pc, int tid);
 void ThreadFinalize(ThreadState *thr);
+void ThreadFinalizerGoroutine(ThreadState *thr);
 
 void MutexCreate(ThreadState *thr, uptr pc, uptr addr, bool rw, bool recursive);
 void MutexDestroy(ThreadState *thr, uptr pc, uptr addr);

compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc

@@ -298,6 +298,10 @@ void ThreadDetach(ThreadState *thr, uptr pc, int tid) {
   }
 }
 
+void ThreadFinalizerGoroutine(ThreadState *thr) {
+  thr->clock.Disable();
+}
+
 void MemoryAccessRange(ThreadState *thr, uptr pc, uptr addr,
                        uptr size, bool is_write) {
   if (size == 0)