xref: /xnu-12377.41.6/tests/intrusive_shared_ptr_src/abi.size_alignment.cpp (revision bbb1b6f9e71b8cdde6e5cd6f4841f207dee3d828) 
1*bbb1b6f9SApple OSS Distributions //
2*bbb1b6f9SApple OSS Distributions // This tests that the alignment and size of a class are the same whether
3*bbb1b6f9SApple OSS Distributions // they have a `T*` or a shared pointer data member.
4*bbb1b6f9SApple OSS Distributions //
5*bbb1b6f9SApple OSS Distributions 
6*bbb1b6f9SApple OSS Distributions #include <libkern/c++/intrusive_shared_ptr.h>
7*bbb1b6f9SApple OSS Distributions #include "test_policy.h"
8*bbb1b6f9SApple OSS Distributions #include <cstddef>
9*bbb1b6f9SApple OSS Distributions #include <darwintest.h>
10*bbb1b6f9SApple OSS Distributions 
11*bbb1b6f9SApple OSS Distributions 
12*bbb1b6f9SApple OSS Distributions namespace ns1 {
13*bbb1b6f9SApple OSS Distributions struct FooShared {
14*bbb1b6f9SApple OSS Distributions 	test_shared_ptr<int> ptr;
15*bbb1b6f9SApple OSS Distributions };
16*bbb1b6f9SApple OSS Distributions 
17*bbb1b6f9SApple OSS Distributions struct FooRaw {
18*bbb1b6f9SApple OSS Distributions 	int* ptr;
19*bbb1b6f9SApple OSS Distributions };
20*bbb1b6f9SApple OSS Distributions 
21*bbb1b6f9SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
22*bbb1b6f9SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
23*bbb1b6f9SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
24*bbb1b6f9SApple OSS Distributions }
25*bbb1b6f9SApple OSS Distributions 
26*bbb1b6f9SApple OSS Distributions namespace ns2 {
27*bbb1b6f9SApple OSS Distributions struct FooShared {
28*bbb1b6f9SApple OSS Distributions 	int i;
29*bbb1b6f9SApple OSS Distributions 	test_shared_ptr<int> ptr;
30*bbb1b6f9SApple OSS Distributions };
31*bbb1b6f9SApple OSS Distributions 
32*bbb1b6f9SApple OSS Distributions struct FooRaw {
33*bbb1b6f9SApple OSS Distributions 	int i;
34*bbb1b6f9SApple OSS Distributions 	int* ptr;
35*bbb1b6f9SApple OSS Distributions };
36*bbb1b6f9SApple OSS Distributions 
37*bbb1b6f9SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
38*bbb1b6f9SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
39*bbb1b6f9SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
40*bbb1b6f9SApple OSS Distributions }
41*bbb1b6f9SApple OSS Distributions 
42*bbb1b6f9SApple OSS Distributions namespace ns3 {
43*bbb1b6f9SApple OSS Distributions struct FooShared {
44*bbb1b6f9SApple OSS Distributions 	char c;
45*bbb1b6f9SApple OSS Distributions 	test_shared_ptr<int> ptr;
46*bbb1b6f9SApple OSS Distributions 	int i;
47*bbb1b6f9SApple OSS Distributions };
48*bbb1b6f9SApple OSS Distributions 
49*bbb1b6f9SApple OSS Distributions struct FooRaw {
50*bbb1b6f9SApple OSS Distributions 	char c;
51*bbb1b6f9SApple OSS Distributions 	int* ptr;
52*bbb1b6f9SApple OSS Distributions 	int i;
53*bbb1b6f9SApple OSS Distributions };
54*bbb1b6f9SApple OSS Distributions 
55*bbb1b6f9SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
56*bbb1b6f9SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
57*bbb1b6f9SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
58*bbb1b6f9SApple OSS Distributions }
59*bbb1b6f9SApple OSS Distributions 
60*bbb1b6f9SApple OSS Distributions namespace ns4 {
61*bbb1b6f9SApple OSS Distributions struct FooShared {
62*bbb1b6f9SApple OSS Distributions 	char c;
63*bbb1b6f9SApple OSS Distributions 	unsigned int b : 5;
64*bbb1b6f9SApple OSS Distributions 	test_shared_ptr<int> ptr;
65*bbb1b6f9SApple OSS Distributions 	int i;
66*bbb1b6f9SApple OSS Distributions };
67*bbb1b6f9SApple OSS Distributions 
68*bbb1b6f9SApple OSS Distributions struct FooRaw {
69*bbb1b6f9SApple OSS Distributions 	char c;
70*bbb1b6f9SApple OSS Distributions 	unsigned int b : 5;
71*bbb1b6f9SApple OSS Distributions 	int* ptr;
72*bbb1b6f9SApple OSS Distributions 	int i;
73*bbb1b6f9SApple OSS Distributions };
74*bbb1b6f9SApple OSS Distributions 
75*bbb1b6f9SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
76*bbb1b6f9SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
77*bbb1b6f9SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
78*bbb1b6f9SApple OSS Distributions }
79*bbb1b6f9SApple OSS Distributions 
80*bbb1b6f9SApple OSS Distributions namespace ns5 {
81*bbb1b6f9SApple OSS Distributions struct __attribute__((packed)) FooShared {
82*bbb1b6f9SApple OSS Distributions 	char c;
83*bbb1b6f9SApple OSS Distributions 	unsigned int b : 5;
84*bbb1b6f9SApple OSS Distributions 	test_shared_ptr<int> ptr;
85*bbb1b6f9SApple OSS Distributions 	int i;
86*bbb1b6f9SApple OSS Distributions };
87*bbb1b6f9SApple OSS Distributions 
88*bbb1b6f9SApple OSS Distributions struct __attribute__((packed)) FooRaw {
89*bbb1b6f9SApple OSS Distributions 	char c;
90*bbb1b6f9SApple OSS Distributions 	unsigned int b : 5;
91*bbb1b6f9SApple OSS Distributions 	int* ptr;
92*bbb1b6f9SApple OSS Distributions 	int i;
93*bbb1b6f9SApple OSS Distributions };
94*bbb1b6f9SApple OSS Distributions 
95*bbb1b6f9SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
96*bbb1b6f9SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
97*bbb1b6f9SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
98*bbb1b6f9SApple OSS Distributions }
99*bbb1b6f9SApple OSS Distributions 
100*bbb1b6f9SApple OSS Distributions namespace ns6 {
101*bbb1b6f9SApple OSS Distributions struct FooShared {
102*bbb1b6f9SApple OSS Distributions 	char c;
103*bbb1b6f9SApple OSS Distributions 	unsigned int b : 5;
104*bbb1b6f9SApple OSS Distributions 	test_shared_ptr<int> ptr;
105*bbb1b6f9SApple OSS Distributions 	int i __attribute__((packed));
106*bbb1b6f9SApple OSS Distributions };
107*bbb1b6f9SApple OSS Distributions 
108*bbb1b6f9SApple OSS Distributions struct FooRaw {
109*bbb1b6f9SApple OSS Distributions 	char c;
110*bbb1b6f9SApple OSS Distributions 	unsigned int b : 5;
111*bbb1b6f9SApple OSS Distributions 	int* ptr;
112*bbb1b6f9SApple OSS Distributions 	int i __attribute__((packed));
113*bbb1b6f9SApple OSS Distributions };
114*bbb1b6f9SApple OSS Distributions 
115*bbb1b6f9SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
116*bbb1b6f9SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
117*bbb1b6f9SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
118*bbb1b6f9SApple OSS Distributions }
119*bbb1b6f9SApple OSS Distributions 
120*bbb1b6f9SApple OSS Distributions namespace ns7 {
121*bbb1b6f9SApple OSS Distributions struct FooShared {
122*bbb1b6f9SApple OSS Distributions 	char c;
123*bbb1b6f9SApple OSS Distributions 	unsigned int b : 5;
124*bbb1b6f9SApple OSS Distributions 	test_shared_ptr<int> ptr __attribute__((packed));
125*bbb1b6f9SApple OSS Distributions 	int i;
126*bbb1b6f9SApple OSS Distributions };
127*bbb1b6f9SApple OSS Distributions 
128*bbb1b6f9SApple OSS Distributions struct FooRaw {
129*bbb1b6f9SApple OSS Distributions 	char c;
130*bbb1b6f9SApple OSS Distributions 	unsigned int b : 5;
131*bbb1b6f9SApple OSS Distributions 	int* ptr __attribute__((packed));
132*bbb1b6f9SApple OSS Distributions 	int i;
133*bbb1b6f9SApple OSS Distributions };
134*bbb1b6f9SApple OSS Distributions 
135*bbb1b6f9SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
136*bbb1b6f9SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
137*bbb1b6f9SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
138*bbb1b6f9SApple OSS Distributions }
139*bbb1b6f9SApple OSS Distributions 
140*bbb1b6f9SApple OSS Distributions T_DECL(abi_size_alignment, "intrusive_shared_ptr.abi.size_alignment", T_META_TAG_VM_PREFERRED) {
141*bbb1b6f9SApple OSS Distributions 	T_PASS("intrusive_shared_ptr.abi.size_alignment compile-time tests passed");
142*bbb1b6f9SApple OSS Distributions }
143