xref: /xnu-11215.81.4/tests/intrusive_shared_ptr_src/abi.size_alignment.cpp (revision d4514f0bc1d3f944c22d92e68b646ac3fb40d452) 
1*d4514f0bSApple OSS Distributions //
2*d4514f0bSApple OSS Distributions // This tests that the alignment and size of a class are the same whether
3*d4514f0bSApple OSS Distributions // they have a `T*` or a shared pointer data member.
4*d4514f0bSApple OSS Distributions //
5*d4514f0bSApple OSS Distributions 
6*d4514f0bSApple OSS Distributions #include <libkern/c++/intrusive_shared_ptr.h>
7*d4514f0bSApple OSS Distributions #include "test_policy.h"
8*d4514f0bSApple OSS Distributions #include <cstddef>
9*d4514f0bSApple OSS Distributions #include <darwintest.h>
10*d4514f0bSApple OSS Distributions 
11*d4514f0bSApple OSS Distributions 
12*d4514f0bSApple OSS Distributions namespace ns1 {
13*d4514f0bSApple OSS Distributions struct FooShared {
14*d4514f0bSApple OSS Distributions 	test_shared_ptr<int> ptr;
15*d4514f0bSApple OSS Distributions };
16*d4514f0bSApple OSS Distributions 
17*d4514f0bSApple OSS Distributions struct FooRaw {
18*d4514f0bSApple OSS Distributions 	int* ptr;
19*d4514f0bSApple OSS Distributions };
20*d4514f0bSApple OSS Distributions 
21*d4514f0bSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
22*d4514f0bSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
23*d4514f0bSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
24*d4514f0bSApple OSS Distributions }
25*d4514f0bSApple OSS Distributions 
26*d4514f0bSApple OSS Distributions namespace ns2 {
27*d4514f0bSApple OSS Distributions struct FooShared {
28*d4514f0bSApple OSS Distributions 	int i;
29*d4514f0bSApple OSS Distributions 	test_shared_ptr<int> ptr;
30*d4514f0bSApple OSS Distributions };
31*d4514f0bSApple OSS Distributions 
32*d4514f0bSApple OSS Distributions struct FooRaw {
33*d4514f0bSApple OSS Distributions 	int i;
34*d4514f0bSApple OSS Distributions 	int* ptr;
35*d4514f0bSApple OSS Distributions };
36*d4514f0bSApple OSS Distributions 
37*d4514f0bSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
38*d4514f0bSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
39*d4514f0bSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
40*d4514f0bSApple OSS Distributions }
41*d4514f0bSApple OSS Distributions 
42*d4514f0bSApple OSS Distributions namespace ns3 {
43*d4514f0bSApple OSS Distributions struct FooShared {
44*d4514f0bSApple OSS Distributions 	char c;
45*d4514f0bSApple OSS Distributions 	test_shared_ptr<int> ptr;
46*d4514f0bSApple OSS Distributions 	int i;
47*d4514f0bSApple OSS Distributions };
48*d4514f0bSApple OSS Distributions 
49*d4514f0bSApple OSS Distributions struct FooRaw {
50*d4514f0bSApple OSS Distributions 	char c;
51*d4514f0bSApple OSS Distributions 	int* ptr;
52*d4514f0bSApple OSS Distributions 	int i;
53*d4514f0bSApple OSS Distributions };
54*d4514f0bSApple OSS Distributions 
55*d4514f0bSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
56*d4514f0bSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
57*d4514f0bSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
58*d4514f0bSApple OSS Distributions }
59*d4514f0bSApple OSS Distributions 
60*d4514f0bSApple OSS Distributions namespace ns4 {
61*d4514f0bSApple OSS Distributions struct FooShared {
62*d4514f0bSApple OSS Distributions 	char c;
63*d4514f0bSApple OSS Distributions 	unsigned int b : 5;
64*d4514f0bSApple OSS Distributions 	test_shared_ptr<int> ptr;
65*d4514f0bSApple OSS Distributions 	int i;
66*d4514f0bSApple OSS Distributions };
67*d4514f0bSApple OSS Distributions 
68*d4514f0bSApple OSS Distributions struct FooRaw {
69*d4514f0bSApple OSS Distributions 	char c;
70*d4514f0bSApple OSS Distributions 	unsigned int b : 5;
71*d4514f0bSApple OSS Distributions 	int* ptr;
72*d4514f0bSApple OSS Distributions 	int i;
73*d4514f0bSApple OSS Distributions };
74*d4514f0bSApple OSS Distributions 
75*d4514f0bSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
76*d4514f0bSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
77*d4514f0bSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
78*d4514f0bSApple OSS Distributions }
79*d4514f0bSApple OSS Distributions 
80*d4514f0bSApple OSS Distributions namespace ns5 {
81*d4514f0bSApple OSS Distributions struct __attribute__((packed)) FooShared {
82*d4514f0bSApple OSS Distributions 	char c;
83*d4514f0bSApple OSS Distributions 	unsigned int b : 5;
84*d4514f0bSApple OSS Distributions 	test_shared_ptr<int> ptr;
85*d4514f0bSApple OSS Distributions 	int i;
86*d4514f0bSApple OSS Distributions };
87*d4514f0bSApple OSS Distributions 
88*d4514f0bSApple OSS Distributions struct __attribute__((packed)) FooRaw {
89*d4514f0bSApple OSS Distributions 	char c;
90*d4514f0bSApple OSS Distributions 	unsigned int b : 5;
91*d4514f0bSApple OSS Distributions 	int* ptr;
92*d4514f0bSApple OSS Distributions 	int i;
93*d4514f0bSApple OSS Distributions };
94*d4514f0bSApple OSS Distributions 
95*d4514f0bSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
96*d4514f0bSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
97*d4514f0bSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
98*d4514f0bSApple OSS Distributions }
99*d4514f0bSApple OSS Distributions 
100*d4514f0bSApple OSS Distributions namespace ns6 {
101*d4514f0bSApple OSS Distributions struct FooShared {
102*d4514f0bSApple OSS Distributions 	char c;
103*d4514f0bSApple OSS Distributions 	unsigned int b : 5;
104*d4514f0bSApple OSS Distributions 	test_shared_ptr<int> ptr;
105*d4514f0bSApple OSS Distributions 	int i __attribute__((packed));
106*d4514f0bSApple OSS Distributions };
107*d4514f0bSApple OSS Distributions 
108*d4514f0bSApple OSS Distributions struct FooRaw {
109*d4514f0bSApple OSS Distributions 	char c;
110*d4514f0bSApple OSS Distributions 	unsigned int b : 5;
111*d4514f0bSApple OSS Distributions 	int* ptr;
112*d4514f0bSApple OSS Distributions 	int i __attribute__((packed));
113*d4514f0bSApple OSS Distributions };
114*d4514f0bSApple OSS Distributions 
115*d4514f0bSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
116*d4514f0bSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
117*d4514f0bSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
118*d4514f0bSApple OSS Distributions }
119*d4514f0bSApple OSS Distributions 
120*d4514f0bSApple OSS Distributions namespace ns7 {
121*d4514f0bSApple OSS Distributions struct FooShared {
122*d4514f0bSApple OSS Distributions 	char c;
123*d4514f0bSApple OSS Distributions 	unsigned int b : 5;
124*d4514f0bSApple OSS Distributions 	test_shared_ptr<int> ptr __attribute__((packed));
125*d4514f0bSApple OSS Distributions 	int i;
126*d4514f0bSApple OSS Distributions };
127*d4514f0bSApple OSS Distributions 
128*d4514f0bSApple OSS Distributions struct FooRaw {
129*d4514f0bSApple OSS Distributions 	char c;
130*d4514f0bSApple OSS Distributions 	unsigned int b : 5;
131*d4514f0bSApple OSS Distributions 	int* ptr __attribute__((packed));
132*d4514f0bSApple OSS Distributions 	int i;
133*d4514f0bSApple OSS Distributions };
134*d4514f0bSApple OSS Distributions 
135*d4514f0bSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
136*d4514f0bSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
137*d4514f0bSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
138*d4514f0bSApple OSS Distributions }
139*d4514f0bSApple OSS Distributions 
140*d4514f0bSApple OSS Distributions T_DECL(abi_size_alignment, "intrusive_shared_ptr.abi.size_alignment", T_META_TAG_VM_PREFERRED) {
141*d4514f0bSApple OSS Distributions 	T_PASS("intrusive_shared_ptr.abi.size_alignment compile-time tests passed");
142*d4514f0bSApple OSS Distributions }
143