X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FSupport%2FValgrind.cpp;h=2c6d6aaadfff9e2a5c886a1efc4f69d044eca187;hb=d6039e045ff2323428debd9419770e369b89e5b8;hp=2e57eb75c30e24533feb1256c980b098afc8f480;hpb=d01cb358048fb6575a5757e789f4e0100db9acc6;p=oota-llvm.git

diff --git a/lib/Support/Valgrind.cpp b/lib/Support/Valgrind.cpp
index 2e57eb75c30..2c6d6aaadff 100644
--- a/lib/Support/Valgrind.cpp
+++ b/lib/Support/Valgrind.cpp
@@ -39,7 +39,7 @@ void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
   if (NotUnderValgrind)
     return;
 
-  (void)VALGRIND_DISCARD_TRANSLATIONS(Addr, Len);
+  VALGRIND_DISCARD_TRANSLATIONS(Addr, Len);
 }
 
 #else  // !HAVE_VALGRIND_VALGRIND_H
@@ -52,3 +52,24 @@ void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
 }
 
 #endif  // !HAVE_VALGRIND_VALGRIND_H
+
+#if LLVM_ENABLE_THREADS != 0 && !defined(NDEBUG)
+// These functions require no implementation, tsan just looks at the arguments
+// they're called with. However, they are required to be weak as some other
+// application or library may already be providing these definitions for the
+// same reason we are.
+extern "C" {
+LLVM_ATTRIBUTE_WEAK void AnnotateHappensAfter(const char *file, int line,
+                                              const volatile void *cv);
+void AnnotateHappensAfter(const char *file, int line, const volatile void *cv) {
+}
+LLVM_ATTRIBUTE_WEAK void AnnotateHappensBefore(const char *file, int line,
+                                               const volatile void *cv);
+void AnnotateHappensBefore(const char *file, int line,
+                           const volatile void *cv) {}
+LLVM_ATTRIBUTE_WEAK void AnnotateIgnoreWritesBegin(const char *file, int line);
+void AnnotateIgnoreWritesBegin(const char *file, int line) {}
+LLVM_ATTRIBUTE_WEAK void AnnotateIgnoreWritesEnd(const char *file, int line);
+void AnnotateIgnoreWritesEnd(const char *file, int line) {}
+}
+#endif