Comment #12 on issue 73 by [email protected]: Detect Use after destruction
(but before free)
http://code.google.com/p/address-sanitizer/issues/detail?id=73
IMO c#2 is valid C++. I think a more elaborate case would look like:
struct A {
A() : a(42) {}
~A() {} // poisons a
int a;
};
int main() {
char buffer[sizeof(A)];
A *a = new (buffer) A();
a->~A();
// buffer is now free. We should be able to reuse that memory to
construct new objects, but it is poisoned, and we can't monitor stores and
loads differently in asan.
a = new (buffer) A(); // BOOM
a->A();
}
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