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void use(int *p);
void test_use_parameter_after_delete(int *p)
{
delete p;
use(p); // warning: use after free
}
class SomeClass {
public:
void f();
};
void test_use_local_after_delete()
{
SomeClass *c = new SomeClass;
delete c;
c->f(); // warning: use after free
}
// XXX clang documentation says this should cause a warning but it doesn't!
void test_delete_alloca()
{
int *p = (int *)__builtin_alloca(sizeof(int));
delete p; // NO warning: deleting memory allocated by alloca
}
void test_double_free()
{
int *p = new int;
delete p;
delete p; // warning: attempt to free released
}
void test_delete_local()
{
int i;
delete &i; // warning: delete address of local
}
// XXX clang documentation says this should cause a warning but it doesn't!
void test_delete_offset()
{
int *p = new int[1];
delete[] (++p);
// NO warning: argument to 'delete[]' is offset by 4 bytes
// from the start of memory allocated by 'new[]'
}