Index: compiler-rt/trunk/lib/tsan/rtl/tsan_interface.h
===================================================================
--- compiler-rt/trunk/lib/tsan/rtl/tsan_interface.h
+++ compiler-rt/trunk/lib/tsan/rtl/tsan_interface.h
@@ -73,6 +73,9 @@
 SANITIZER_INTERFACE_ATTRIBUTE void __tsan_func_entry(void *call_pc);
 SANITIZER_INTERFACE_ATTRIBUTE void __tsan_func_exit();
 
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_ignore_thread_begin();
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_ignore_thread_end();
+
 SANITIZER_INTERFACE_ATTRIBUTE
 void __tsan_read_range(void *addr, unsigned long size);  // NOLINT
 SANITIZER_INTERFACE_ATTRIBUTE
Index: compiler-rt/trunk/lib/tsan/rtl/tsan_interface_inl.h
===================================================================
--- compiler-rt/trunk/lib/tsan/rtl/tsan_interface_inl.h
+++ compiler-rt/trunk/lib/tsan/rtl/tsan_interface_inl.h
@@ -108,6 +108,14 @@
   FuncExit(cur_thread());
 }
 
+void __tsan_ignore_thread_begin() {
+  ThreadIgnoreBegin(cur_thread(), CALLERPC);
+}
+
+void __tsan_ignore_thread_end() {
+  ThreadIgnoreEnd(cur_thread(), CALLERPC);
+}
+
 void __tsan_read_range(void *addr, uptr size) {
   MemoryAccessRange(cur_thread(), CALLERPC, (uptr)addr, size, false);
 }