xref: /xnu-8019.80.24/tests/intrusive_shared_ptr_src/abi.size_alignment.cpp (revision a325d9c4a84054e40bbe985afedcb50ab80993ea) 
1*a325d9c4SApple OSS Distributions //
2*a325d9c4SApple OSS Distributions // This tests that the alignment and size of a class are the same whether
3*a325d9c4SApple OSS Distributions // they have a `T*` or a shared pointer data member.
4*a325d9c4SApple OSS Distributions //
5*a325d9c4SApple OSS Distributions 
6*a325d9c4SApple OSS Distributions #include <libkern/c++/intrusive_shared_ptr.h>
7*a325d9c4SApple OSS Distributions #include "test_policy.h"
8*a325d9c4SApple OSS Distributions #include <cstddef>
9*a325d9c4SApple OSS Distributions #include <darwintest.h>
10*a325d9c4SApple OSS Distributions 
11*a325d9c4SApple OSS Distributions 
12*a325d9c4SApple OSS Distributions namespace ns1 {
13*a325d9c4SApple OSS Distributions struct FooShared {
14*a325d9c4SApple OSS Distributions 	test_shared_ptr<int> ptr;
15*a325d9c4SApple OSS Distributions };
16*a325d9c4SApple OSS Distributions 
17*a325d9c4SApple OSS Distributions struct FooRaw {
18*a325d9c4SApple OSS Distributions 	int* ptr;
19*a325d9c4SApple OSS Distributions };
20*a325d9c4SApple OSS Distributions 
21*a325d9c4SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
22*a325d9c4SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
23*a325d9c4SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
24*a325d9c4SApple OSS Distributions }
25*a325d9c4SApple OSS Distributions 
26*a325d9c4SApple OSS Distributions namespace ns2 {
27*a325d9c4SApple OSS Distributions struct FooShared {
28*a325d9c4SApple OSS Distributions 	int i;
29*a325d9c4SApple OSS Distributions 	test_shared_ptr<int> ptr;
30*a325d9c4SApple OSS Distributions };
31*a325d9c4SApple OSS Distributions 
32*a325d9c4SApple OSS Distributions struct FooRaw {
33*a325d9c4SApple OSS Distributions 	int i;
34*a325d9c4SApple OSS Distributions 	int* ptr;
35*a325d9c4SApple OSS Distributions };
36*a325d9c4SApple OSS Distributions 
37*a325d9c4SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
38*a325d9c4SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
39*a325d9c4SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
40*a325d9c4SApple OSS Distributions }
41*a325d9c4SApple OSS Distributions 
42*a325d9c4SApple OSS Distributions namespace ns3 {
43*a325d9c4SApple OSS Distributions struct FooShared {
44*a325d9c4SApple OSS Distributions 	char c;
45*a325d9c4SApple OSS Distributions 	test_shared_ptr<int> ptr;
46*a325d9c4SApple OSS Distributions 	int i;
47*a325d9c4SApple OSS Distributions };
48*a325d9c4SApple OSS Distributions 
49*a325d9c4SApple OSS Distributions struct FooRaw {
50*a325d9c4SApple OSS Distributions 	char c;
51*a325d9c4SApple OSS Distributions 	int* ptr;
52*a325d9c4SApple OSS Distributions 	int i;
53*a325d9c4SApple OSS Distributions };
54*a325d9c4SApple OSS Distributions 
55*a325d9c4SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
56*a325d9c4SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
57*a325d9c4SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
58*a325d9c4SApple OSS Distributions }
59*a325d9c4SApple OSS Distributions 
60*a325d9c4SApple OSS Distributions namespace ns4 {
61*a325d9c4SApple OSS Distributions struct FooShared {
62*a325d9c4SApple OSS Distributions 	char c;
63*a325d9c4SApple OSS Distributions 	unsigned int b : 5;
64*a325d9c4SApple OSS Distributions 	test_shared_ptr<int> ptr;
65*a325d9c4SApple OSS Distributions 	int i;
66*a325d9c4SApple OSS Distributions };
67*a325d9c4SApple OSS Distributions 
68*a325d9c4SApple OSS Distributions struct FooRaw {
69*a325d9c4SApple OSS Distributions 	char c;
70*a325d9c4SApple OSS Distributions 	unsigned int b : 5;
71*a325d9c4SApple OSS Distributions 	int* ptr;
72*a325d9c4SApple OSS Distributions 	int i;
73*a325d9c4SApple OSS Distributions };
74*a325d9c4SApple OSS Distributions 
75*a325d9c4SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
76*a325d9c4SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
77*a325d9c4SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
78*a325d9c4SApple OSS Distributions }
79*a325d9c4SApple OSS Distributions 
80*a325d9c4SApple OSS Distributions namespace ns5 {
81*a325d9c4SApple OSS Distributions struct __attribute__((packed)) FooShared {
82*a325d9c4SApple OSS Distributions 	char c;
83*a325d9c4SApple OSS Distributions 	unsigned int b : 5;
84*a325d9c4SApple OSS Distributions 	test_shared_ptr<int> ptr;
85*a325d9c4SApple OSS Distributions 	int i;
86*a325d9c4SApple OSS Distributions };
87*a325d9c4SApple OSS Distributions 
88*a325d9c4SApple OSS Distributions struct __attribute__((packed)) FooRaw {
89*a325d9c4SApple OSS Distributions 	char c;
90*a325d9c4SApple OSS Distributions 	unsigned int b : 5;
91*a325d9c4SApple OSS Distributions 	int* ptr;
92*a325d9c4SApple OSS Distributions 	int i;
93*a325d9c4SApple OSS Distributions };
94*a325d9c4SApple OSS Distributions 
95*a325d9c4SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
96*a325d9c4SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
97*a325d9c4SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
98*a325d9c4SApple OSS Distributions }
99*a325d9c4SApple OSS Distributions 
100*a325d9c4SApple OSS Distributions namespace ns6 {
101*a325d9c4SApple OSS Distributions struct FooShared {
102*a325d9c4SApple OSS Distributions 	char c;
103*a325d9c4SApple OSS Distributions 	unsigned int b : 5;
104*a325d9c4SApple OSS Distributions 	test_shared_ptr<int> ptr;
105*a325d9c4SApple OSS Distributions 	int i __attribute__((packed));
106*a325d9c4SApple OSS Distributions };
107*a325d9c4SApple OSS Distributions 
108*a325d9c4SApple OSS Distributions struct FooRaw {
109*a325d9c4SApple OSS Distributions 	char c;
110*a325d9c4SApple OSS Distributions 	unsigned int b : 5;
111*a325d9c4SApple OSS Distributions 	int* ptr;
112*a325d9c4SApple OSS Distributions 	int i __attribute__((packed));
113*a325d9c4SApple OSS Distributions };
114*a325d9c4SApple OSS Distributions 
115*a325d9c4SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
116*a325d9c4SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
117*a325d9c4SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
118*a325d9c4SApple OSS Distributions }
119*a325d9c4SApple OSS Distributions 
120*a325d9c4SApple OSS Distributions namespace ns7 {
121*a325d9c4SApple OSS Distributions struct FooShared {
122*a325d9c4SApple OSS Distributions 	char c;
123*a325d9c4SApple OSS Distributions 	unsigned int b : 5;
124*a325d9c4SApple OSS Distributions 	test_shared_ptr<int> ptr __attribute__((packed));
125*a325d9c4SApple OSS Distributions 	int i;
126*a325d9c4SApple OSS Distributions };
127*a325d9c4SApple OSS Distributions 
128*a325d9c4SApple OSS Distributions struct FooRaw {
129*a325d9c4SApple OSS Distributions 	char c;
130*a325d9c4SApple OSS Distributions 	unsigned int b : 5;
131*a325d9c4SApple OSS Distributions 	int* ptr __attribute__((packed));
132*a325d9c4SApple OSS Distributions 	int i;
133*a325d9c4SApple OSS Distributions };
134*a325d9c4SApple OSS Distributions 
135*a325d9c4SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
136*a325d9c4SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
137*a325d9c4SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
138*a325d9c4SApple OSS Distributions }
139*a325d9c4SApple OSS Distributions 
140*a325d9c4SApple OSS Distributions T_DECL(abi_size_alignment, "intrusive_shared_ptr.abi.size_alignment") {
141*a325d9c4SApple OSS Distributions 	T_PASS("intrusive_shared_ptr.abi.size_alignment compile-time tests passed");
142*a325d9c4SApple OSS Distributions }
143