tsan: add ValgrindSlowdown() "dynamic annotation"

llvm-svn: 156981

diff --git a/compiler-rt/lib/tsan/rtl/tsan_interface_ann.cc b/compiler-rt/lib/tsan/rtl/tsan_interface_ann.cc
index 96f1f8a..0877e2a 100644 (file)
--- a/compiler-rt/lib/tsan/rtl/tsan_interface_ann.cc
+++ b/compiler-rt/lib/tsan/rtl/tsan_interface_ann.cc
@@ -335,6 +335,10 @@ int RunningOnValgrind() {
   return 0;
 }
 
+double ValgrindSlowdown(void) {
+  return 10.0;
+}
+
 const char *ThreadSanitizerQuery(const char *query) {
   if (internal_strcmp(query, "pure_happens_before") == 0)
     return "1";