clang/test/Analysis/new-dynamic-types.cpp

   1 // RUN: %clang_analyze_cc1 -analyzer-checker=core -std=c++11 -verify %s
   2
   3 // expected-no-diagnostics
   4
   5 typedef __typeof(sizeof(int)) size_t;
   6
   7 void *operator new(size_t size, void *ptr);
   8
   9 struct B {
  10   virtual void foo();
  11 };
  12
  13 struct D : public B {
  14   virtual void foo() override {}
  15 };
  16
  17 void test_ub() {
  18   // FIXME: Potentially warn because this code is pretty weird.
  19   B b;
  20   new (&b) D;
  21   b.foo(); // no-crash
  22 }
  23
  24 void test_non_ub() {
  25   char c[sizeof(D)]; // Should be enough storage.
  26   new (c) D;
  27   ((B *)c)->foo(); // no-crash
  28 }