tsan: fix windows build (1)
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@162996 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/sanitizer_common/sanitizer_atomic_msvc.h b/lib/sanitizer_common/sanitizer_atomic_msvc.h
index 2a15b59..b21275b 100644
--- a/lib/sanitizer_common/sanitizer_atomic_msvc.h
+++ b/lib/sanitizer_common/sanitizer_atomic_msvc.h
@@ -24,6 +24,10 @@
extern "C" long _InterlockedExchangeAdd( // NOLINT
long volatile * Addend, long Value); // NOLINT
#pragma intrinsic(_InterlockedExchangeAdd)
+extern "C" void *_InterlockedCompareExchangePointer(
+ void *volatile *Destination,
+ void *Exchange, void *Comparand);
+#pragma intrinsic(_InterlockedCompareExchangePointer)
namespace __sanitizer {
@@ -107,6 +111,27 @@
return v;
}
+INLINE bool atomic_compare_exchange_strong(volatile uptr *a,
+ uptr *cmp,
+ uptr xchg,
+ memory_order mo) {
+ uptr cmpv = *cmp;
+ uptr prev = (uptr)_InterlockedCompareExchangePointer(
+ (void*volatile*)&a->val_dont_use, (void*)xchg, (void*)cmpv);
+ if (prev == cmpv)
+ return true;
+ *cmp = prev;
+ return false;
+}
+
+template<typename T>
+INLINE bool atomic_compare_exchange_weak(volatile T *a,
+ typename T::Type *cmp,
+ typename T::Type xchg,
+ memory_order mo) {
+ return atomic_compare_exchange_strong(a, cmp, xchg, mo);
+}
+
} // namespace __sanitizer
#endif // SANITIZER_ATOMIC_CLANG_H
