[asan] add missing asan instrumentation in generated global init functions

llvm-svn: 159191

clang/lib/CodeGen/CGDeclCXX.cpp

@@ -228,6 +228,9 @@ CreateGlobalInitOrDestructFunction(CodeGenModule &CGM,
   if (!CGM.getLangOpts().Exceptions)
     Fn->setDoesNotThrow();
 
+  if (CGM.getLangOpts().AddressSanitizer)
+    Fn->addFnAttr(llvm::Attribute::AddressSafety);
+
   return Fn;
 }
 

clang/test/CodeGen/address-safety-attr.cpp

@@ -33,3 +33,9 @@ int TemplateAddressSafetyOk() { return i; }
 
 int force_instance = TemplateAddressSafetyOk<42>()
                    + TemplateNoAddressSafety<42>();
+
+// Check that __cxx_global_var_init* get the address_safety attribute.
+int global1 = 0;
+int global2 = *(int*)((char*)&global1+1);
+// CHECK-NOT: @__cxx_global_var_init{{.*}}address_safety
+// ASAN: @__cxx_global_var_init{{.*}}address_safety