Dtor callback emitted when msan attribute not repressed for this function.
Summary: In addition to checking compiler flags, the front-end also examines the attributes of the destructor definition to ensure that the SanitizeMemory attribute is attached.
Reviewers: eugenis, kcc
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D11727
refactored test into new file, revised how function attribute examined
modified test to examine default dtor with and without attribute
removed attribute check
llvm-svn: 243912
diff --git a/clang/test/CodeGenCXX/sanitize-dtor-fn-attribute.cpp b/clang/test/CodeGenCXX/sanitize-dtor-fn-attribute.cpp
new file mode 100644
index 0000000..8a9e477
--- /dev/null
+++ b/clang/test/CodeGenCXX/sanitize-dtor-fn-attribute.cpp
@@ -0,0 +1,51 @@
+// Test -fsanitize-memory-use-after-dtor
+// RUN: %clang_cc1 -fsanitize=memory -fsanitize-memory-use-after-dtor -std=c++11 -triple=x86_64-pc-linux -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -DATTRIBUTE -fsanitize=memory -fsanitize-memory-use-after-dtor -std=c++11 -triple=x86_64-pc-linux -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ATTR
+
+template <class T> class Vector {
+ public:
+ ~Vector() {}
+};
+
+struct No_San {
+ Vector<int> v;
+ No_San() { }
+#ifdef ATTRIBUTE
+ __attribute__((no_sanitize_memory)) ~No_San() = default;
+#else
+ ~No_San() = default;
+#endif
+};
+
+int main() {
+ No_San *ns = new No_San();
+ ns->~No_San();
+ return 0;
+}
+
+// Repressing the sanitization attribute results in no msan
+// instrumentation of the destructor
+// CHECK: define {{.*}}No_SanD1Ev{{.*}} [[ATTRIBUTE:#[0-9]+]]
+// CHECK: call void {{.*}}No_SanD2Ev
+// CHECK: call void @__sanitizer_dtor_callback
+// CHECK: ret void
+
+// CHECK-ATTR: define {{.*}}No_SanD1Ev{{.*}} [[ATTRIBUTE:#[0-9]+]]
+// CHECK-ATTR: call void {{.*}}No_SanD2Ev
+// CHECK-ATTR-NOT: call void @__sanitizer_dtor_callback
+// CHECK-ATTR: ret void
+
+
+// CHECK: define {{.*}}No_SanD2Ev{{.*}} [[ATTRIBUTE:#[0-9]+]]
+// CHECK: call void {{.*}}Vector
+// CHECK: call void @__sanitizer_dtor_callback
+// CHECK: ret void
+
+// CHECK-ATTR: define {{.*}}No_SanD2Ev{{.*}} [[ATTRIBUTE:#[0-9]+]]
+// CHECK-ATTR: call void {{.*}}Vector
+// CHECK-ATTR-NOT: call void @__sanitizer_dtor_callback
+// CHECK-ATTR: ret void
+
+// When attribute is repressed, the destructor does not emit any tail calls
+// CHECK: attributes [[ATTRIBUTE]] = {{.*}} sanitize_memory
+// CHECK-ATTR-NOT: attributes [[ATTRIBUTE]] = {{.*}} sanitize_memory