Index: lib/tsan/rtl/tsan.syms.extra
===================================================================
--- lib/tsan/rtl/tsan.syms.extra
+++ lib/tsan/rtl/tsan.syms.extra
@@ -1,4 +1,5 @@
 __tsan_init
+__tsan_flush_memory
 __tsan_read*
 __tsan_write*
 __tsan_vptr*
Index: lib/tsan/rtl/tsan_interface.h
===================================================================
--- lib/tsan/rtl/tsan_interface.h
+++ lib/tsan/rtl/tsan_interface.h
@@ -32,6 +32,8 @@
 // before any instrumented code is executed and before any call to malloc.
 SANITIZER_INTERFACE_ATTRIBUTE void __tsan_init();
 
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_flush_memory();
+
 SANITIZER_INTERFACE_ATTRIBUTE void __tsan_read1(void *addr);
 SANITIZER_INTERFACE_ATTRIBUTE void __tsan_read2(void *addr);
 SANITIZER_INTERFACE_ATTRIBUTE void __tsan_read4(void *addr);
Index: lib/tsan/rtl/tsan_interface.cc
===================================================================
--- lib/tsan/rtl/tsan_interface.cc
+++ lib/tsan/rtl/tsan_interface.cc
@@ -28,6 +28,10 @@
   Initialize(cur_thread());
 }
 
+void __tsan_flush_memory() {
+  FlushShadowMemory();
+}
+
 void __tsan_read16(void *addr) {
   MemoryRead(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
   MemoryRead(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);