xref: /xnu-11417.101.15/tests/intrusive_shared_ptr_src/abi.size_alignment.cpp (revision e3723e1f17661b24996789d8afc084c0c3303b26) 
1*e3723e1fSApple OSS Distributions //
2*e3723e1fSApple OSS Distributions // This tests that the alignment and size of a class are the same whether
3*e3723e1fSApple OSS Distributions // they have a `T*` or a shared pointer data member.
4*e3723e1fSApple OSS Distributions //
5*e3723e1fSApple OSS Distributions 
6*e3723e1fSApple OSS Distributions #include <libkern/c++/intrusive_shared_ptr.h>
7*e3723e1fSApple OSS Distributions #include "test_policy.h"
8*e3723e1fSApple OSS Distributions #include <cstddef>
9*e3723e1fSApple OSS Distributions #include <darwintest.h>
10*e3723e1fSApple OSS Distributions 
11*e3723e1fSApple OSS Distributions 
12*e3723e1fSApple OSS Distributions namespace ns1 {
13*e3723e1fSApple OSS Distributions struct FooShared {
14*e3723e1fSApple OSS Distributions 	test_shared_ptr<int> ptr;
15*e3723e1fSApple OSS Distributions };
16*e3723e1fSApple OSS Distributions 
17*e3723e1fSApple OSS Distributions struct FooRaw {
18*e3723e1fSApple OSS Distributions 	int* ptr;
19*e3723e1fSApple OSS Distributions };
20*e3723e1fSApple OSS Distributions 
21*e3723e1fSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
22*e3723e1fSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
23*e3723e1fSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
24*e3723e1fSApple OSS Distributions }
25*e3723e1fSApple OSS Distributions 
26*e3723e1fSApple OSS Distributions namespace ns2 {
27*e3723e1fSApple OSS Distributions struct FooShared {
28*e3723e1fSApple OSS Distributions 	int i;
29*e3723e1fSApple OSS Distributions 	test_shared_ptr<int> ptr;
30*e3723e1fSApple OSS Distributions };
31*e3723e1fSApple OSS Distributions 
32*e3723e1fSApple OSS Distributions struct FooRaw {
33*e3723e1fSApple OSS Distributions 	int i;
34*e3723e1fSApple OSS Distributions 	int* ptr;
35*e3723e1fSApple OSS Distributions };
36*e3723e1fSApple OSS Distributions 
37*e3723e1fSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
38*e3723e1fSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
39*e3723e1fSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
40*e3723e1fSApple OSS Distributions }
41*e3723e1fSApple OSS Distributions 
42*e3723e1fSApple OSS Distributions namespace ns3 {
43*e3723e1fSApple OSS Distributions struct FooShared {
44*e3723e1fSApple OSS Distributions 	char c;
45*e3723e1fSApple OSS Distributions 	test_shared_ptr<int> ptr;
46*e3723e1fSApple OSS Distributions 	int i;
47*e3723e1fSApple OSS Distributions };
48*e3723e1fSApple OSS Distributions 
49*e3723e1fSApple OSS Distributions struct FooRaw {
50*e3723e1fSApple OSS Distributions 	char c;
51*e3723e1fSApple OSS Distributions 	int* ptr;
52*e3723e1fSApple OSS Distributions 	int i;
53*e3723e1fSApple OSS Distributions };
54*e3723e1fSApple OSS Distributions 
55*e3723e1fSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
56*e3723e1fSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
57*e3723e1fSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
58*e3723e1fSApple OSS Distributions }
59*e3723e1fSApple OSS Distributions 
60*e3723e1fSApple OSS Distributions namespace ns4 {
61*e3723e1fSApple OSS Distributions struct FooShared {
62*e3723e1fSApple OSS Distributions 	char c;
63*e3723e1fSApple OSS Distributions 	unsigned int b : 5;
64*e3723e1fSApple OSS Distributions 	test_shared_ptr<int> ptr;
65*e3723e1fSApple OSS Distributions 	int i;
66*e3723e1fSApple OSS Distributions };
67*e3723e1fSApple OSS Distributions 
68*e3723e1fSApple OSS Distributions struct FooRaw {
69*e3723e1fSApple OSS Distributions 	char c;
70*e3723e1fSApple OSS Distributions 	unsigned int b : 5;
71*e3723e1fSApple OSS Distributions 	int* ptr;
72*e3723e1fSApple OSS Distributions 	int i;
73*e3723e1fSApple OSS Distributions };
74*e3723e1fSApple OSS Distributions 
75*e3723e1fSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
76*e3723e1fSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
77*e3723e1fSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
78*e3723e1fSApple OSS Distributions }
79*e3723e1fSApple OSS Distributions 
80*e3723e1fSApple OSS Distributions namespace ns5 {
81*e3723e1fSApple OSS Distributions struct __attribute__((packed)) FooShared {
82*e3723e1fSApple OSS Distributions 	char c;
83*e3723e1fSApple OSS Distributions 	unsigned int b : 5;
84*e3723e1fSApple OSS Distributions 	test_shared_ptr<int> ptr;
85*e3723e1fSApple OSS Distributions 	int i;
86*e3723e1fSApple OSS Distributions };
87*e3723e1fSApple OSS Distributions 
88*e3723e1fSApple OSS Distributions struct __attribute__((packed)) FooRaw {
89*e3723e1fSApple OSS Distributions 	char c;
90*e3723e1fSApple OSS Distributions 	unsigned int b : 5;
91*e3723e1fSApple OSS Distributions 	int* ptr;
92*e3723e1fSApple OSS Distributions 	int i;
93*e3723e1fSApple OSS Distributions };
94*e3723e1fSApple OSS Distributions 
95*e3723e1fSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
96*e3723e1fSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
97*e3723e1fSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
98*e3723e1fSApple OSS Distributions }
99*e3723e1fSApple OSS Distributions 
100*e3723e1fSApple OSS Distributions namespace ns6 {
101*e3723e1fSApple OSS Distributions struct FooShared {
102*e3723e1fSApple OSS Distributions 	char c;
103*e3723e1fSApple OSS Distributions 	unsigned int b : 5;
104*e3723e1fSApple OSS Distributions 	test_shared_ptr<int> ptr;
105*e3723e1fSApple OSS Distributions 	int i __attribute__((packed));
106*e3723e1fSApple OSS Distributions };
107*e3723e1fSApple OSS Distributions 
108*e3723e1fSApple OSS Distributions struct FooRaw {
109*e3723e1fSApple OSS Distributions 	char c;
110*e3723e1fSApple OSS Distributions 	unsigned int b : 5;
111*e3723e1fSApple OSS Distributions 	int* ptr;
112*e3723e1fSApple OSS Distributions 	int i __attribute__((packed));
113*e3723e1fSApple OSS Distributions };
114*e3723e1fSApple OSS Distributions 
115*e3723e1fSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
116*e3723e1fSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
117*e3723e1fSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
118*e3723e1fSApple OSS Distributions }
119*e3723e1fSApple OSS Distributions 
120*e3723e1fSApple OSS Distributions namespace ns7 {
121*e3723e1fSApple OSS Distributions struct FooShared {
122*e3723e1fSApple OSS Distributions 	char c;
123*e3723e1fSApple OSS Distributions 	unsigned int b : 5;
124*e3723e1fSApple OSS Distributions 	test_shared_ptr<int> ptr __attribute__((packed));
125*e3723e1fSApple OSS Distributions 	int i;
126*e3723e1fSApple OSS Distributions };
127*e3723e1fSApple OSS Distributions 
128*e3723e1fSApple OSS Distributions struct FooRaw {
129*e3723e1fSApple OSS Distributions 	char c;
130*e3723e1fSApple OSS Distributions 	unsigned int b : 5;
131*e3723e1fSApple OSS Distributions 	int* ptr __attribute__((packed));
132*e3723e1fSApple OSS Distributions 	int i;
133*e3723e1fSApple OSS Distributions };
134*e3723e1fSApple OSS Distributions 
135*e3723e1fSApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
136*e3723e1fSApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
137*e3723e1fSApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
138*e3723e1fSApple OSS Distributions }
139*e3723e1fSApple OSS Distributions 
140*e3723e1fSApple OSS Distributions T_DECL(abi_size_alignment, "intrusive_shared_ptr.abi.size_alignment", T_META_TAG_VM_PREFERRED) {
141*e3723e1fSApple OSS Distributions 	T_PASS("intrusive_shared_ptr.abi.size_alignment compile-time tests passed");
142*e3723e1fSApple OSS Distributions }
143