[PATCH] D11733: Runtime check of poisoning derived class members.

[Naomi Musgrave]

nmusgrave created this revision.
nmusgrave added reviewers: eugenis, kcc.
nmusgrave added a subscriber: cfe-commits.

Simple test case to verify that an instance of a derived class with virtual base is properly poisoned

http://reviews.llvm.org/D11733

Files:
  test/msan/dtor-derived-class.cc

Index: test/msan/dtor-derived-class.cc
===================================================================
--- /dev/null
+++ test/msan/dtor-derived-class.cc
@@ -0,0 +1,55 @@
+// RUN: %clangxx_msan %s -fsanitize=memory -fsanitize-memory-use-after-dtor -o %t && MSAN_OPTIONS=poison_in_dtor=1 %run %t >%t.out 2>&1
+// RUN: FileCheck %s < %t.out
+
+// 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: FileCheck %s < %t.out
+
+// 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
+// RUN: FileCheck %s < %t.out
+
+#include <stdio.h>
+#include<sanitizer/msan_interface.h>
+
+struct Base {
+  int x_;
+  Base() {
+    x_ = 5;
+  }
+  virtual ~Base() { }
+};
+
+struct Derived:public Base {
+  int y_;
+  Derived() {
+    y_ = 10;
+  }
+  ~Derived() { }
+};
+
+int main() {
+  Derived d;
+  d.~Derived();
+
+  if (__msan_test_shadow(&d, sizeof(d)) != -1)
+      printf("d is poisoned\n");
+  else
+    printf("d is not poisoned\n");
+  // CHECK: d is poisoned
+
+  Base *b = new Derived();
+  b->~Base();
+
+  if (__msan_test_shadow(b, sizeof(*b)) != -1)
+    printf("b is poisoned\n");
+  else
+    printf("b is not poisoned\n");
+  // CHECK: b is poisoned
+
+  if (__msan_test_shadow(&b, sizeof(b)) != -1)
+    printf("*b is poisoned\n");
+  else
+    printf("*b is not poisoned\n");
+  // CHECK: *b is not poisoned
+
+  return 0;
+}


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