xref: /xnu-12377.81.4/tests/intrusive_shared_ptr_src/abi.size_alignment.cpp (revision 043036a2b3718f7f0be807e2870f8f47d3fa0796) 
1*043036a2SApple OSS Distributions //
2*043036a2SApple OSS Distributions // This tests that the alignment and size of a class are the same whether
3*043036a2SApple OSS Distributions // they have a `T*` or a shared pointer data member.
4*043036a2SApple OSS Distributions //
5*043036a2SApple OSS Distributions 
6*043036a2SApple OSS Distributions #include <libkern/c++/intrusive_shared_ptr.h>
7*043036a2SApple OSS Distributions #include "test_policy.h"
8*043036a2SApple OSS Distributions #include <cstddef>
9*043036a2SApple OSS Distributions #include <darwintest.h>
10*043036a2SApple OSS Distributions 
11*043036a2SApple OSS Distributions 
12*043036a2SApple OSS Distributions namespace ns1 {
13*043036a2SApple OSS Distributions struct FooShared {
14*043036a2SApple OSS Distributions 	test_shared_ptr<int> ptr;
15*043036a2SApple OSS Distributions };
16*043036a2SApple OSS Distributions 
17*043036a2SApple OSS Distributions struct FooRaw {
18*043036a2SApple OSS Distributions 	int* ptr;
19*043036a2SApple OSS Distributions };
20*043036a2SApple OSS Distributions 
21*043036a2SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
22*043036a2SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
23*043036a2SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
24*043036a2SApple OSS Distributions }
25*043036a2SApple OSS Distributions 
26*043036a2SApple OSS Distributions namespace ns2 {
27*043036a2SApple OSS Distributions struct FooShared {
28*043036a2SApple OSS Distributions 	int i;
29*043036a2SApple OSS Distributions 	test_shared_ptr<int> ptr;
30*043036a2SApple OSS Distributions };
31*043036a2SApple OSS Distributions 
32*043036a2SApple OSS Distributions struct FooRaw {
33*043036a2SApple OSS Distributions 	int i;
34*043036a2SApple OSS Distributions 	int* ptr;
35*043036a2SApple OSS Distributions };
36*043036a2SApple OSS Distributions 
37*043036a2SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
38*043036a2SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
39*043036a2SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
40*043036a2SApple OSS Distributions }
41*043036a2SApple OSS Distributions 
42*043036a2SApple OSS Distributions namespace ns3 {
43*043036a2SApple OSS Distributions struct FooShared {
44*043036a2SApple OSS Distributions 	char c;
45*043036a2SApple OSS Distributions 	test_shared_ptr<int> ptr;
46*043036a2SApple OSS Distributions 	int i;
47*043036a2SApple OSS Distributions };
48*043036a2SApple OSS Distributions 
49*043036a2SApple OSS Distributions struct FooRaw {
50*043036a2SApple OSS Distributions 	char c;
51*043036a2SApple OSS Distributions 	int* ptr;
52*043036a2SApple OSS Distributions 	int i;
53*043036a2SApple OSS Distributions };
54*043036a2SApple OSS Distributions 
55*043036a2SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
56*043036a2SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
57*043036a2SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
58*043036a2SApple OSS Distributions }
59*043036a2SApple OSS Distributions 
60*043036a2SApple OSS Distributions namespace ns4 {
61*043036a2SApple OSS Distributions struct FooShared {
62*043036a2SApple OSS Distributions 	char c;
63*043036a2SApple OSS Distributions 	unsigned int b : 5;
64*043036a2SApple OSS Distributions 	test_shared_ptr<int> ptr;
65*043036a2SApple OSS Distributions 	int i;
66*043036a2SApple OSS Distributions };
67*043036a2SApple OSS Distributions 
68*043036a2SApple OSS Distributions struct FooRaw {
69*043036a2SApple OSS Distributions 	char c;
70*043036a2SApple OSS Distributions 	unsigned int b : 5;
71*043036a2SApple OSS Distributions 	int* ptr;
72*043036a2SApple OSS Distributions 	int i;
73*043036a2SApple OSS Distributions };
74*043036a2SApple OSS Distributions 
75*043036a2SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
76*043036a2SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
77*043036a2SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
78*043036a2SApple OSS Distributions }
79*043036a2SApple OSS Distributions 
80*043036a2SApple OSS Distributions namespace ns5 {
81*043036a2SApple OSS Distributions struct __attribute__((packed)) FooShared {
82*043036a2SApple OSS Distributions 	char c;
83*043036a2SApple OSS Distributions 	unsigned int b : 5;
84*043036a2SApple OSS Distributions 	test_shared_ptr<int> ptr;
85*043036a2SApple OSS Distributions 	int i;
86*043036a2SApple OSS Distributions };
87*043036a2SApple OSS Distributions 
88*043036a2SApple OSS Distributions struct __attribute__((packed)) FooRaw {
89*043036a2SApple OSS Distributions 	char c;
90*043036a2SApple OSS Distributions 	unsigned int b : 5;
91*043036a2SApple OSS Distributions 	int* ptr;
92*043036a2SApple OSS Distributions 	int i;
93*043036a2SApple OSS Distributions };
94*043036a2SApple OSS Distributions 
95*043036a2SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
96*043036a2SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
97*043036a2SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
98*043036a2SApple OSS Distributions }
99*043036a2SApple OSS Distributions 
100*043036a2SApple OSS Distributions namespace ns6 {
101*043036a2SApple OSS Distributions struct FooShared {
102*043036a2SApple OSS Distributions 	char c;
103*043036a2SApple OSS Distributions 	unsigned int b : 5;
104*043036a2SApple OSS Distributions 	test_shared_ptr<int> ptr;
105*043036a2SApple OSS Distributions 	int i __attribute__((packed));
106*043036a2SApple OSS Distributions };
107*043036a2SApple OSS Distributions 
108*043036a2SApple OSS Distributions struct FooRaw {
109*043036a2SApple OSS Distributions 	char c;
110*043036a2SApple OSS Distributions 	unsigned int b : 5;
111*043036a2SApple OSS Distributions 	int* ptr;
112*043036a2SApple OSS Distributions 	int i __attribute__((packed));
113*043036a2SApple OSS Distributions };
114*043036a2SApple OSS Distributions 
115*043036a2SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
116*043036a2SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
117*043036a2SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
118*043036a2SApple OSS Distributions }
119*043036a2SApple OSS Distributions 
120*043036a2SApple OSS Distributions namespace ns7 {
121*043036a2SApple OSS Distributions struct FooShared {
122*043036a2SApple OSS Distributions 	char c;
123*043036a2SApple OSS Distributions 	unsigned int b : 5;
124*043036a2SApple OSS Distributions 	test_shared_ptr<int> ptr __attribute__((packed));
125*043036a2SApple OSS Distributions 	int i;
126*043036a2SApple OSS Distributions };
127*043036a2SApple OSS Distributions 
128*043036a2SApple OSS Distributions struct FooRaw {
129*043036a2SApple OSS Distributions 	char c;
130*043036a2SApple OSS Distributions 	unsigned int b : 5;
131*043036a2SApple OSS Distributions 	int* ptr __attribute__((packed));
132*043036a2SApple OSS Distributions 	int i;
133*043036a2SApple OSS Distributions };
134*043036a2SApple OSS Distributions 
135*043036a2SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
136*043036a2SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
137*043036a2SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
138*043036a2SApple OSS Distributions }
139*043036a2SApple OSS Distributions 
140*043036a2SApple OSS Distributions T_DECL(abi_size_alignment, "intrusive_shared_ptr.abi.size_alignment", T_META_TAG_VM_PREFERRED) {
141*043036a2SApple OSS Distributions 	T_PASS("intrusive_shared_ptr.abi.size_alignment compile-time tests passed");
142*043036a2SApple OSS Distributions }
143