xref: /xnu-8796.121.2/tests/intrusive_shared_ptr_src/abi.size_alignment.cpp (revision c54f35ca767986246321eb901baf8f5ff7923f6a) 
1*c54f35caSApple OSS Distributions //
2*c54f35caSApple OSS Distributions // This tests that the alignment and size of a class are the same whether
3*c54f35caSApple OSS Distributions // they have a `T*` or a shared pointer data member.
4*c54f35caSApple OSS Distributions //
5*c54f35caSApple OSS Distributions 
6*c54f35caSApple OSS Distributions #include <libkern/c++/intrusive_shared_ptr.h>
7*c54f35caSApple OSS Distributions #include "test_policy.h"
8*c54f35caSApple OSS Distributions #include <cstddef>
9*c54f35caSApple OSS Distributions #include <darwintest.h>
10*c54f35caSApple OSS Distributions 
11*c54f35caSApple OSS Distributions 
12*c54f35caSApple OSS Distributions namespace ns1 {
13*c54f35caSApple OSS Distributions struct FooShared {
14*c54f35caSApple OSS Distributions 	test_shared_ptr<int> ptr;
15*c54f35caSApple OSS Distributions };
16*c54f35caSApple OSS Distributions 
17*c54f35caSApple OSS Distributions struct FooRaw {
18*c54f35caSApple OSS Distributions 	int* ptr;
19*c54f35caSApple OSS Distributions };
20*c54f35caSApple OSS Distributions 
21*c54f35caSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
22*c54f35caSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
23*c54f35caSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
24*c54f35caSApple OSS Distributions }
25*c54f35caSApple OSS Distributions 
26*c54f35caSApple OSS Distributions namespace ns2 {
27*c54f35caSApple OSS Distributions struct FooShared {
28*c54f35caSApple OSS Distributions 	int i;
29*c54f35caSApple OSS Distributions 	test_shared_ptr<int> ptr;
30*c54f35caSApple OSS Distributions };
31*c54f35caSApple OSS Distributions 
32*c54f35caSApple OSS Distributions struct FooRaw {
33*c54f35caSApple OSS Distributions 	int i;
34*c54f35caSApple OSS Distributions 	int* ptr;
35*c54f35caSApple OSS Distributions };
36*c54f35caSApple OSS Distributions 
37*c54f35caSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
38*c54f35caSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
39*c54f35caSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
40*c54f35caSApple OSS Distributions }
41*c54f35caSApple OSS Distributions 
42*c54f35caSApple OSS Distributions namespace ns3 {
43*c54f35caSApple OSS Distributions struct FooShared {
44*c54f35caSApple OSS Distributions 	char c;
45*c54f35caSApple OSS Distributions 	test_shared_ptr<int> ptr;
46*c54f35caSApple OSS Distributions 	int i;
47*c54f35caSApple OSS Distributions };
48*c54f35caSApple OSS Distributions 
49*c54f35caSApple OSS Distributions struct FooRaw {
50*c54f35caSApple OSS Distributions 	char c;
51*c54f35caSApple OSS Distributions 	int* ptr;
52*c54f35caSApple OSS Distributions 	int i;
53*c54f35caSApple OSS Distributions };
54*c54f35caSApple OSS Distributions 
55*c54f35caSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
56*c54f35caSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
57*c54f35caSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
58*c54f35caSApple OSS Distributions }
59*c54f35caSApple OSS Distributions 
60*c54f35caSApple OSS Distributions namespace ns4 {
61*c54f35caSApple OSS Distributions struct FooShared {
62*c54f35caSApple OSS Distributions 	char c;
63*c54f35caSApple OSS Distributions 	unsigned int b : 5;
64*c54f35caSApple OSS Distributions 	test_shared_ptr<int> ptr;
65*c54f35caSApple OSS Distributions 	int i;
66*c54f35caSApple OSS Distributions };
67*c54f35caSApple OSS Distributions 
68*c54f35caSApple OSS Distributions struct FooRaw {
69*c54f35caSApple OSS Distributions 	char c;
70*c54f35caSApple OSS Distributions 	unsigned int b : 5;
71*c54f35caSApple OSS Distributions 	int* ptr;
72*c54f35caSApple OSS Distributions 	int i;
73*c54f35caSApple OSS Distributions };
74*c54f35caSApple OSS Distributions 
75*c54f35caSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
76*c54f35caSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
77*c54f35caSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
78*c54f35caSApple OSS Distributions }
79*c54f35caSApple OSS Distributions 
80*c54f35caSApple OSS Distributions namespace ns5 {
81*c54f35caSApple OSS Distributions struct __attribute__((packed)) FooShared {
82*c54f35caSApple OSS Distributions 	char c;
83*c54f35caSApple OSS Distributions 	unsigned int b : 5;
84*c54f35caSApple OSS Distributions 	test_shared_ptr<int> ptr;
85*c54f35caSApple OSS Distributions 	int i;
86*c54f35caSApple OSS Distributions };
87*c54f35caSApple OSS Distributions 
88*c54f35caSApple OSS Distributions struct __attribute__((packed)) FooRaw {
89*c54f35caSApple OSS Distributions 	char c;
90*c54f35caSApple OSS Distributions 	unsigned int b : 5;
91*c54f35caSApple OSS Distributions 	int* ptr;
92*c54f35caSApple OSS Distributions 	int i;
93*c54f35caSApple OSS Distributions };
94*c54f35caSApple OSS Distributions 
95*c54f35caSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
96*c54f35caSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
97*c54f35caSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
98*c54f35caSApple OSS Distributions }
99*c54f35caSApple OSS Distributions 
100*c54f35caSApple OSS Distributions namespace ns6 {
101*c54f35caSApple OSS Distributions struct FooShared {
102*c54f35caSApple OSS Distributions 	char c;
103*c54f35caSApple OSS Distributions 	unsigned int b : 5;
104*c54f35caSApple OSS Distributions 	test_shared_ptr<int> ptr;
105*c54f35caSApple OSS Distributions 	int i __attribute__((packed));
106*c54f35caSApple OSS Distributions };
107*c54f35caSApple OSS Distributions 
108*c54f35caSApple OSS Distributions struct FooRaw {
109*c54f35caSApple OSS Distributions 	char c;
110*c54f35caSApple OSS Distributions 	unsigned int b : 5;
111*c54f35caSApple OSS Distributions 	int* ptr;
112*c54f35caSApple OSS Distributions 	int i __attribute__((packed));
113*c54f35caSApple OSS Distributions };
114*c54f35caSApple OSS Distributions 
115*c54f35caSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
116*c54f35caSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
117*c54f35caSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
118*c54f35caSApple OSS Distributions }
119*c54f35caSApple OSS Distributions 
120*c54f35caSApple OSS Distributions namespace ns7 {
121*c54f35caSApple OSS Distributions struct FooShared {
122*c54f35caSApple OSS Distributions 	char c;
123*c54f35caSApple OSS Distributions 	unsigned int b : 5;
124*c54f35caSApple OSS Distributions 	test_shared_ptr<int> ptr __attribute__((packed));
125*c54f35caSApple OSS Distributions 	int i;
126*c54f35caSApple OSS Distributions };
127*c54f35caSApple OSS Distributions 
128*c54f35caSApple OSS Distributions struct FooRaw {
129*c54f35caSApple OSS Distributions 	char c;
130*c54f35caSApple OSS Distributions 	unsigned int b : 5;
131*c54f35caSApple OSS Distributions 	int* ptr __attribute__((packed));
132*c54f35caSApple OSS Distributions 	int i;
133*c54f35caSApple OSS Distributions };
134*c54f35caSApple OSS Distributions 
135*c54f35caSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
136*c54f35caSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
137*c54f35caSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
138*c54f35caSApple OSS Distributions }
139*c54f35caSApple OSS Distributions 
140*c54f35caSApple OSS Distributions T_DECL(abi_size_alignment, "intrusive_shared_ptr.abi.size_alignment") {
141*c54f35caSApple OSS Distributions 	T_PASS("intrusive_shared_ptr.abi.size_alignment compile-time tests passed");
142*c54f35caSApple OSS Distributions }
143