xref: /xnu-11215.61.5/tests/intrusive_shared_ptr_src/abi.size_alignment.cpp (revision 4f1223e81cd707a65cc109d0b8ad6653699da3c4) 
1*4f1223e8SApple OSS Distributions //
2*4f1223e8SApple OSS Distributions // This tests that the alignment and size of a class are the same whether
3*4f1223e8SApple OSS Distributions // they have a `T*` or a shared pointer data member.
4*4f1223e8SApple OSS Distributions //
5*4f1223e8SApple OSS Distributions 
6*4f1223e8SApple OSS Distributions #include <libkern/c++/intrusive_shared_ptr.h>
7*4f1223e8SApple OSS Distributions #include "test_policy.h"
8*4f1223e8SApple OSS Distributions #include <cstddef>
9*4f1223e8SApple OSS Distributions #include <darwintest.h>
10*4f1223e8SApple OSS Distributions 
11*4f1223e8SApple OSS Distributions 
12*4f1223e8SApple OSS Distributions namespace ns1 {
13*4f1223e8SApple OSS Distributions struct FooShared {
14*4f1223e8SApple OSS Distributions 	test_shared_ptr<int> ptr;
15*4f1223e8SApple OSS Distributions };
16*4f1223e8SApple OSS Distributions 
17*4f1223e8SApple OSS Distributions struct FooRaw {
18*4f1223e8SApple OSS Distributions 	int* ptr;
19*4f1223e8SApple OSS Distributions };
20*4f1223e8SApple OSS Distributions 
21*4f1223e8SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
22*4f1223e8SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
23*4f1223e8SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
24*4f1223e8SApple OSS Distributions }
25*4f1223e8SApple OSS Distributions 
26*4f1223e8SApple OSS Distributions namespace ns2 {
27*4f1223e8SApple OSS Distributions struct FooShared {
28*4f1223e8SApple OSS Distributions 	int i;
29*4f1223e8SApple OSS Distributions 	test_shared_ptr<int> ptr;
30*4f1223e8SApple OSS Distributions };
31*4f1223e8SApple OSS Distributions 
32*4f1223e8SApple OSS Distributions struct FooRaw {
33*4f1223e8SApple OSS Distributions 	int i;
34*4f1223e8SApple OSS Distributions 	int* ptr;
35*4f1223e8SApple OSS Distributions };
36*4f1223e8SApple OSS Distributions 
37*4f1223e8SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
38*4f1223e8SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
39*4f1223e8SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
40*4f1223e8SApple OSS Distributions }
41*4f1223e8SApple OSS Distributions 
42*4f1223e8SApple OSS Distributions namespace ns3 {
43*4f1223e8SApple OSS Distributions struct FooShared {
44*4f1223e8SApple OSS Distributions 	char c;
45*4f1223e8SApple OSS Distributions 	test_shared_ptr<int> ptr;
46*4f1223e8SApple OSS Distributions 	int i;
47*4f1223e8SApple OSS Distributions };
48*4f1223e8SApple OSS Distributions 
49*4f1223e8SApple OSS Distributions struct FooRaw {
50*4f1223e8SApple OSS Distributions 	char c;
51*4f1223e8SApple OSS Distributions 	int* ptr;
52*4f1223e8SApple OSS Distributions 	int i;
53*4f1223e8SApple OSS Distributions };
54*4f1223e8SApple OSS Distributions 
55*4f1223e8SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
56*4f1223e8SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
57*4f1223e8SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
58*4f1223e8SApple OSS Distributions }
59*4f1223e8SApple OSS Distributions 
60*4f1223e8SApple OSS Distributions namespace ns4 {
61*4f1223e8SApple OSS Distributions struct FooShared {
62*4f1223e8SApple OSS Distributions 	char c;
63*4f1223e8SApple OSS Distributions 	unsigned int b : 5;
64*4f1223e8SApple OSS Distributions 	test_shared_ptr<int> ptr;
65*4f1223e8SApple OSS Distributions 	int i;
66*4f1223e8SApple OSS Distributions };
67*4f1223e8SApple OSS Distributions 
68*4f1223e8SApple OSS Distributions struct FooRaw {
69*4f1223e8SApple OSS Distributions 	char c;
70*4f1223e8SApple OSS Distributions 	unsigned int b : 5;
71*4f1223e8SApple OSS Distributions 	int* ptr;
72*4f1223e8SApple OSS Distributions 	int i;
73*4f1223e8SApple OSS Distributions };
74*4f1223e8SApple OSS Distributions 
75*4f1223e8SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
76*4f1223e8SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
77*4f1223e8SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
78*4f1223e8SApple OSS Distributions }
79*4f1223e8SApple OSS Distributions 
80*4f1223e8SApple OSS Distributions namespace ns5 {
81*4f1223e8SApple OSS Distributions struct __attribute__((packed)) FooShared {
82*4f1223e8SApple OSS Distributions 	char c;
83*4f1223e8SApple OSS Distributions 	unsigned int b : 5;
84*4f1223e8SApple OSS Distributions 	test_shared_ptr<int> ptr;
85*4f1223e8SApple OSS Distributions 	int i;
86*4f1223e8SApple OSS Distributions };
87*4f1223e8SApple OSS Distributions 
88*4f1223e8SApple OSS Distributions struct __attribute__((packed)) FooRaw {
89*4f1223e8SApple OSS Distributions 	char c;
90*4f1223e8SApple OSS Distributions 	unsigned int b : 5;
91*4f1223e8SApple OSS Distributions 	int* ptr;
92*4f1223e8SApple OSS Distributions 	int i;
93*4f1223e8SApple OSS Distributions };
94*4f1223e8SApple OSS Distributions 
95*4f1223e8SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
96*4f1223e8SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
97*4f1223e8SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
98*4f1223e8SApple OSS Distributions }
99*4f1223e8SApple OSS Distributions 
100*4f1223e8SApple OSS Distributions namespace ns6 {
101*4f1223e8SApple OSS Distributions struct FooShared {
102*4f1223e8SApple OSS Distributions 	char c;
103*4f1223e8SApple OSS Distributions 	unsigned int b : 5;
104*4f1223e8SApple OSS Distributions 	test_shared_ptr<int> ptr;
105*4f1223e8SApple OSS Distributions 	int i __attribute__((packed));
106*4f1223e8SApple OSS Distributions };
107*4f1223e8SApple OSS Distributions 
108*4f1223e8SApple OSS Distributions struct FooRaw {
109*4f1223e8SApple OSS Distributions 	char c;
110*4f1223e8SApple OSS Distributions 	unsigned int b : 5;
111*4f1223e8SApple OSS Distributions 	int* ptr;
112*4f1223e8SApple OSS Distributions 	int i __attribute__((packed));
113*4f1223e8SApple OSS Distributions };
114*4f1223e8SApple OSS Distributions 
115*4f1223e8SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
116*4f1223e8SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
117*4f1223e8SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
118*4f1223e8SApple OSS Distributions }
119*4f1223e8SApple OSS Distributions 
120*4f1223e8SApple OSS Distributions namespace ns7 {
121*4f1223e8SApple OSS Distributions struct FooShared {
122*4f1223e8SApple OSS Distributions 	char c;
123*4f1223e8SApple OSS Distributions 	unsigned int b : 5;
124*4f1223e8SApple OSS Distributions 	test_shared_ptr<int> ptr __attribute__((packed));
125*4f1223e8SApple OSS Distributions 	int i;
126*4f1223e8SApple OSS Distributions };
127*4f1223e8SApple OSS Distributions 
128*4f1223e8SApple OSS Distributions struct FooRaw {
129*4f1223e8SApple OSS Distributions 	char c;
130*4f1223e8SApple OSS Distributions 	unsigned int b : 5;
131*4f1223e8SApple OSS Distributions 	int* ptr __attribute__((packed));
132*4f1223e8SApple OSS Distributions 	int i;
133*4f1223e8SApple OSS Distributions };
134*4f1223e8SApple OSS Distributions 
135*4f1223e8SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
136*4f1223e8SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
137*4f1223e8SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
138*4f1223e8SApple OSS Distributions }
139*4f1223e8SApple OSS Distributions 
140*4f1223e8SApple OSS Distributions T_DECL(abi_size_alignment, "intrusive_shared_ptr.abi.size_alignment", T_META_TAG_VM_PREFERRED) {
141*4f1223e8SApple OSS Distributions 	T_PASS("intrusive_shared_ptr.abi.size_alignment compile-time tests passed");
142*4f1223e8SApple OSS Distributions }
143