Failing test highlighting no poisoning when destructor not declared.

[nmusgrave]

Summary

When destructor for a class is not declared, no destructor
is emitted, and members are not poisoned. Test case exhibits this
current bug in use-after-dtor implementation.

[nmusgrave]

• Rename test files.

[eugenis]

test/msan/dtor-trivial.cpp

7 ↗

(On Diff #34225)

full link instead of just an issue number
especially since it's not on the the llvm bugtracker

test/msan/dtor-generated.cpp

+// RUN: %clangxx_msan %s -O0 -fsanitize=memory -fsanitize-memory-use-after-dtor -o %t && MSAN_OPTIONS=poison_in_dtor=1 %run %t >%t.out 2>&1
+
+// RUN: %clangxx_msan %s -O1 -fsanitize=memory -fsanitize-memory-use-after-dtor -o %t && MSAN_OPTIONS=poison_in_dtor=1 %run %t >%t.out 2>&1
+
+// RUN: %clangxx_msan %s -O2 -fsanitize=memory -fsanitize-memory-use-after-dtor -o %t && MSAN_OPTIONS=poison_in_dtor=1 %run %t >%t.out 2>&1
+
+// TODO Success pending on resolution of 596
+// XFAIL: *
+
+#include <assert.h>
+#include <sanitizer/msan_interface.h>
+
+template <class T> class Vector {
+ public:
+  int size;
+  ~Vector() {}
+};
+
+struct NonTrivial {
+  int a;
+  Vector<int> v;
+};
+
+struct Trivial {
+  int a;
+  int b;
+};
+
+int main() {
+  NonTrivial *nt = new NonTrivial();
+  nt->~NonTrivial();
+  assert(__msan_test_shadow(nt, sizeof(*nt)) != -1);
+
+  Trivial *t = new Trivial();
+  t->~Trivial();
+  assert(__msan_test_shadow(t, sizeof(*t)) != -1);
+
+  return 0;
+}