xref: /xnu-12377.61.12/tests/intrusive_shared_ptr_src/abi.size_alignment.cpp (revision 4d495c6e23c53686cf65f45067f79024cf5dcee8) 
1*4d495c6eSApple OSS Distributions //
2*4d495c6eSApple OSS Distributions // This tests that the alignment and size of a class are the same whether
3*4d495c6eSApple OSS Distributions // they have a `T*` or a shared pointer data member.
4*4d495c6eSApple OSS Distributions //
5*4d495c6eSApple OSS Distributions 
6*4d495c6eSApple OSS Distributions #include <libkern/c++/intrusive_shared_ptr.h>
7*4d495c6eSApple OSS Distributions #include "test_policy.h"
8*4d495c6eSApple OSS Distributions #include <cstddef>
9*4d495c6eSApple OSS Distributions #include <darwintest.h>
10*4d495c6eSApple OSS Distributions 
11*4d495c6eSApple OSS Distributions 
12*4d495c6eSApple OSS Distributions namespace ns1 {
13*4d495c6eSApple OSS Distributions struct FooShared {
14*4d495c6eSApple OSS Distributions 	test_shared_ptr<int> ptr;
15*4d495c6eSApple OSS Distributions };
16*4d495c6eSApple OSS Distributions 
17*4d495c6eSApple OSS Distributions struct FooRaw {
18*4d495c6eSApple OSS Distributions 	int* ptr;
19*4d495c6eSApple OSS Distributions };
20*4d495c6eSApple OSS Distributions 
21*4d495c6eSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
22*4d495c6eSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
23*4d495c6eSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
24*4d495c6eSApple OSS Distributions }
25*4d495c6eSApple OSS Distributions 
26*4d495c6eSApple OSS Distributions namespace ns2 {
27*4d495c6eSApple OSS Distributions struct FooShared {
28*4d495c6eSApple OSS Distributions 	int i;
29*4d495c6eSApple OSS Distributions 	test_shared_ptr<int> ptr;
30*4d495c6eSApple OSS Distributions };
31*4d495c6eSApple OSS Distributions 
32*4d495c6eSApple OSS Distributions struct FooRaw {
33*4d495c6eSApple OSS Distributions 	int i;
34*4d495c6eSApple OSS Distributions 	int* ptr;
35*4d495c6eSApple OSS Distributions };
36*4d495c6eSApple OSS Distributions 
37*4d495c6eSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
38*4d495c6eSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
39*4d495c6eSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
40*4d495c6eSApple OSS Distributions }
41*4d495c6eSApple OSS Distributions 
42*4d495c6eSApple OSS Distributions namespace ns3 {
43*4d495c6eSApple OSS Distributions struct FooShared {
44*4d495c6eSApple OSS Distributions 	char c;
45*4d495c6eSApple OSS Distributions 	test_shared_ptr<int> ptr;
46*4d495c6eSApple OSS Distributions 	int i;
47*4d495c6eSApple OSS Distributions };
48*4d495c6eSApple OSS Distributions 
49*4d495c6eSApple OSS Distributions struct FooRaw {
50*4d495c6eSApple OSS Distributions 	char c;
51*4d495c6eSApple OSS Distributions 	int* ptr;
52*4d495c6eSApple OSS Distributions 	int i;
53*4d495c6eSApple OSS Distributions };
54*4d495c6eSApple OSS Distributions 
55*4d495c6eSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
56*4d495c6eSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
57*4d495c6eSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
58*4d495c6eSApple OSS Distributions }
59*4d495c6eSApple OSS Distributions 
60*4d495c6eSApple OSS Distributions namespace ns4 {
61*4d495c6eSApple OSS Distributions struct FooShared {
62*4d495c6eSApple OSS Distributions 	char c;
63*4d495c6eSApple OSS Distributions 	unsigned int b : 5;
64*4d495c6eSApple OSS Distributions 	test_shared_ptr<int> ptr;
65*4d495c6eSApple OSS Distributions 	int i;
66*4d495c6eSApple OSS Distributions };
67*4d495c6eSApple OSS Distributions 
68*4d495c6eSApple OSS Distributions struct FooRaw {
69*4d495c6eSApple OSS Distributions 	char c;
70*4d495c6eSApple OSS Distributions 	unsigned int b : 5;
71*4d495c6eSApple OSS Distributions 	int* ptr;
72*4d495c6eSApple OSS Distributions 	int i;
73*4d495c6eSApple OSS Distributions };
74*4d495c6eSApple OSS Distributions 
75*4d495c6eSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
76*4d495c6eSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
77*4d495c6eSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
78*4d495c6eSApple OSS Distributions }
79*4d495c6eSApple OSS Distributions 
80*4d495c6eSApple OSS Distributions namespace ns5 {
81*4d495c6eSApple OSS Distributions struct __attribute__((packed)) FooShared {
82*4d495c6eSApple OSS Distributions 	char c;
83*4d495c6eSApple OSS Distributions 	unsigned int b : 5;
84*4d495c6eSApple OSS Distributions 	test_shared_ptr<int> ptr;
85*4d495c6eSApple OSS Distributions 	int i;
86*4d495c6eSApple OSS Distributions };
87*4d495c6eSApple OSS Distributions 
88*4d495c6eSApple OSS Distributions struct __attribute__((packed)) FooRaw {
89*4d495c6eSApple OSS Distributions 	char c;
90*4d495c6eSApple OSS Distributions 	unsigned int b : 5;
91*4d495c6eSApple OSS Distributions 	int* ptr;
92*4d495c6eSApple OSS Distributions 	int i;
93*4d495c6eSApple OSS Distributions };
94*4d495c6eSApple OSS Distributions 
95*4d495c6eSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
96*4d495c6eSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
97*4d495c6eSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
98*4d495c6eSApple OSS Distributions }
99*4d495c6eSApple OSS Distributions 
100*4d495c6eSApple OSS Distributions namespace ns6 {
101*4d495c6eSApple OSS Distributions struct FooShared {
102*4d495c6eSApple OSS Distributions 	char c;
103*4d495c6eSApple OSS Distributions 	unsigned int b : 5;
104*4d495c6eSApple OSS Distributions 	test_shared_ptr<int> ptr;
105*4d495c6eSApple OSS Distributions 	int i __attribute__((packed));
106*4d495c6eSApple OSS Distributions };
107*4d495c6eSApple OSS Distributions 
108*4d495c6eSApple OSS Distributions struct FooRaw {
109*4d495c6eSApple OSS Distributions 	char c;
110*4d495c6eSApple OSS Distributions 	unsigned int b : 5;
111*4d495c6eSApple OSS Distributions 	int* ptr;
112*4d495c6eSApple OSS Distributions 	int i __attribute__((packed));
113*4d495c6eSApple OSS Distributions };
114*4d495c6eSApple OSS Distributions 
115*4d495c6eSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
116*4d495c6eSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
117*4d495c6eSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
118*4d495c6eSApple OSS Distributions }
119*4d495c6eSApple OSS Distributions 
120*4d495c6eSApple OSS Distributions namespace ns7 {
121*4d495c6eSApple OSS Distributions struct FooShared {
122*4d495c6eSApple OSS Distributions 	char c;
123*4d495c6eSApple OSS Distributions 	unsigned int b : 5;
124*4d495c6eSApple OSS Distributions 	test_shared_ptr<int> ptr __attribute__((packed));
125*4d495c6eSApple OSS Distributions 	int i;
126*4d495c6eSApple OSS Distributions };
127*4d495c6eSApple OSS Distributions 
128*4d495c6eSApple OSS Distributions struct FooRaw {
129*4d495c6eSApple OSS Distributions 	char c;
130*4d495c6eSApple OSS Distributions 	unsigned int b : 5;
131*4d495c6eSApple OSS Distributions 	int* ptr __attribute__((packed));
132*4d495c6eSApple OSS Distributions 	int i;
133*4d495c6eSApple OSS Distributions };
134*4d495c6eSApple OSS Distributions 
135*4d495c6eSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
136*4d495c6eSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
137*4d495c6eSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
138*4d495c6eSApple OSS Distributions }
139*4d495c6eSApple OSS Distributions 
140*4d495c6eSApple OSS Distributions T_DECL(abi_size_alignment, "intrusive_shared_ptr.abi.size_alignment", T_META_TAG_VM_PREFERRED) {
141*4d495c6eSApple OSS Distributions 	T_PASS("intrusive_shared_ptr.abi.size_alignment compile-time tests passed");
142*4d495c6eSApple OSS Distributions }
143