1 //
2 // This tests that we can call functions implemented using raw pointers from
3 // an API vending itself as returning shared pointers, because both are ABI
4 // compatible.
5 //
6 // In this TU, SharedPtr<T> is intrusive_shared_ptr<T>, since USE_SHARED_PTR
7 // is defined.
8 //
9 
10 #define USE_SHARED_PTR
11 
12 #include <libkern/c++/intrusive_shared_ptr.h>
13 #include <darwintest.h>
14 #include "abi_helper.h"
15 
16 static_assert(sizeof(SharedPtr<T>) == sizeof(T*));
17 static_assert(alignof(SharedPtr<T>) == alignof(T*));
18 
19 // Receive a shared pointer from a function that actually returns a raw pointer
20 T_DECL(abi_caller_smart, "intrusive_shared_ptr.abi.caller.smart", T_META_TAG_VM_PREFERRED) {
21 	T obj{3};
22 	T* expected = &obj;
23 	SharedPtr<T> result = return_raw_as_shared(expected);
24 	CHECK(result.get() == expected);
25 
26 	// Sometimes the test above passes even though it should fail, if the
27 	// right address happens to be on the stack in the right location. This
28 	// can happen if abi.caller.raw is run just before this test. This second
29 	// test makes sure it fails when it should.
30 	CHECK(result->i == 3);
31 }
32