FOLLY_ATTR_GNU_NOCLONE wrapping gnu::noclone

Reviewed By: mcfi

Differential Revision: D84175753

fbshipit-source-id: 0fead2ce2c8c099b96381158fa10a4abe624655a

Author: yfeldblum

third-party/folly/src/folly/CppAttributes.h

@@ -177,6 +177,12 @@
 #define FOLLY_ATTR_GNU_RETAIN
 #endif
 
+#if FOLLY_HAS_CPP_ATTRIBUTE(gnu::noclone)
+#define FOLLY_ATTR_GNU_NOCLONE gnu::noclone
+#else
+#define FOLLY_ATTR_GNU_NOCLONE
+#endif
+
 #if FOLLY_HAS_CPP_ATTRIBUTE(clang::lifetimebound)
 #define FOLLY_ATTR_CLANG_LIFETIMEBOUND clang::lifetimebound
 #else

third-party/folly/src/folly/synchronization/test/SmallLocksBenchmark.cpp

@@ -436,8 +436,7 @@ struct VirtualImpl : VirtualBase {
   ~VirtualImpl() override {}
 };
 
-#ifndef __clang__
-__attribute__((noinline, noclone)) VirtualBase* makeVirtual() {
+FOLLY_NOINLINE [[FOLLY_ATTR_GNU_NOCLONE]] VirtualBase* makeVirtual() {
   return new VirtualImpl();
 }
 
@@ -448,7 +447,6 @@ BENCHMARK(VirtualFunctionCall, iters) {
   }
   delete vb;
 }
-#endif
 
 BENCHMARK_DRAW_LINE();