xref: /xnu-11417.140.69/tests/intrusive_shared_ptr_src/abi.size_alignment.cpp (revision 43a90889846e00bfb5cf1d255cdc0a701a1e05a4) 
1*43a90889SApple OSS Distributions //
2*43a90889SApple OSS Distributions // This tests that the alignment and size of a class are the same whether
3*43a90889SApple OSS Distributions // they have a `T*` or a shared pointer data member.
4*43a90889SApple OSS Distributions //
5*43a90889SApple OSS Distributions 
6*43a90889SApple OSS Distributions #include <libkern/c++/intrusive_shared_ptr.h>
7*43a90889SApple OSS Distributions #include "test_policy.h"
8*43a90889SApple OSS Distributions #include <cstddef>
9*43a90889SApple OSS Distributions #include <darwintest.h>
10*43a90889SApple OSS Distributions 
11*43a90889SApple OSS Distributions 
12*43a90889SApple OSS Distributions namespace ns1 {
13*43a90889SApple OSS Distributions struct FooShared {
14*43a90889SApple OSS Distributions 	test_shared_ptr<int> ptr;
15*43a90889SApple OSS Distributions };
16*43a90889SApple OSS Distributions 
17*43a90889SApple OSS Distributions struct FooRaw {
18*43a90889SApple OSS Distributions 	int* ptr;
19*43a90889SApple OSS Distributions };
20*43a90889SApple OSS Distributions 
21*43a90889SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
22*43a90889SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
23*43a90889SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
24*43a90889SApple OSS Distributions }
25*43a90889SApple OSS Distributions 
26*43a90889SApple OSS Distributions namespace ns2 {
27*43a90889SApple OSS Distributions struct FooShared {
28*43a90889SApple OSS Distributions 	int i;
29*43a90889SApple OSS Distributions 	test_shared_ptr<int> ptr;
30*43a90889SApple OSS Distributions };
31*43a90889SApple OSS Distributions 
32*43a90889SApple OSS Distributions struct FooRaw {
33*43a90889SApple OSS Distributions 	int i;
34*43a90889SApple OSS Distributions 	int* ptr;
35*43a90889SApple OSS Distributions };
36*43a90889SApple OSS Distributions 
37*43a90889SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
38*43a90889SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
39*43a90889SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
40*43a90889SApple OSS Distributions }
41*43a90889SApple OSS Distributions 
42*43a90889SApple OSS Distributions namespace ns3 {
43*43a90889SApple OSS Distributions struct FooShared {
44*43a90889SApple OSS Distributions 	char c;
45*43a90889SApple OSS Distributions 	test_shared_ptr<int> ptr;
46*43a90889SApple OSS Distributions 	int i;
47*43a90889SApple OSS Distributions };
48*43a90889SApple OSS Distributions 
49*43a90889SApple OSS Distributions struct FooRaw {
50*43a90889SApple OSS Distributions 	char c;
51*43a90889SApple OSS Distributions 	int* ptr;
52*43a90889SApple OSS Distributions 	int i;
53*43a90889SApple OSS Distributions };
54*43a90889SApple OSS Distributions 
55*43a90889SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
56*43a90889SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
57*43a90889SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
58*43a90889SApple OSS Distributions }
59*43a90889SApple OSS Distributions 
60*43a90889SApple OSS Distributions namespace ns4 {
61*43a90889SApple OSS Distributions struct FooShared {
62*43a90889SApple OSS Distributions 	char c;
63*43a90889SApple OSS Distributions 	unsigned int b : 5;
64*43a90889SApple OSS Distributions 	test_shared_ptr<int> ptr;
65*43a90889SApple OSS Distributions 	int i;
66*43a90889SApple OSS Distributions };
67*43a90889SApple OSS Distributions 
68*43a90889SApple OSS Distributions struct FooRaw {
69*43a90889SApple OSS Distributions 	char c;
70*43a90889SApple OSS Distributions 	unsigned int b : 5;
71*43a90889SApple OSS Distributions 	int* ptr;
72*43a90889SApple OSS Distributions 	int i;
73*43a90889SApple OSS Distributions };
74*43a90889SApple OSS Distributions 
75*43a90889SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
76*43a90889SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
77*43a90889SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
78*43a90889SApple OSS Distributions }
79*43a90889SApple OSS Distributions 
80*43a90889SApple OSS Distributions namespace ns5 {
81*43a90889SApple OSS Distributions struct __attribute__((packed)) FooShared {
82*43a90889SApple OSS Distributions 	char c;
83*43a90889SApple OSS Distributions 	unsigned int b : 5;
84*43a90889SApple OSS Distributions 	test_shared_ptr<int> ptr;
85*43a90889SApple OSS Distributions 	int i;
86*43a90889SApple OSS Distributions };
87*43a90889SApple OSS Distributions 
88*43a90889SApple OSS Distributions struct __attribute__((packed)) FooRaw {
89*43a90889SApple OSS Distributions 	char c;
90*43a90889SApple OSS Distributions 	unsigned int b : 5;
91*43a90889SApple OSS Distributions 	int* ptr;
92*43a90889SApple OSS Distributions 	int i;
93*43a90889SApple OSS Distributions };
94*43a90889SApple OSS Distributions 
95*43a90889SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
96*43a90889SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
97*43a90889SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
98*43a90889SApple OSS Distributions }
99*43a90889SApple OSS Distributions 
100*43a90889SApple OSS Distributions namespace ns6 {
101*43a90889SApple OSS Distributions struct FooShared {
102*43a90889SApple OSS Distributions 	char c;
103*43a90889SApple OSS Distributions 	unsigned int b : 5;
104*43a90889SApple OSS Distributions 	test_shared_ptr<int> ptr;
105*43a90889SApple OSS Distributions 	int i __attribute__((packed));
106*43a90889SApple OSS Distributions };
107*43a90889SApple OSS Distributions 
108*43a90889SApple OSS Distributions struct FooRaw {
109*43a90889SApple OSS Distributions 	char c;
110*43a90889SApple OSS Distributions 	unsigned int b : 5;
111*43a90889SApple OSS Distributions 	int* ptr;
112*43a90889SApple OSS Distributions 	int i __attribute__((packed));
113*43a90889SApple OSS Distributions };
114*43a90889SApple OSS Distributions 
115*43a90889SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
116*43a90889SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
117*43a90889SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
118*43a90889SApple OSS Distributions }
119*43a90889SApple OSS Distributions 
120*43a90889SApple OSS Distributions namespace ns7 {
121*43a90889SApple OSS Distributions struct FooShared {
122*43a90889SApple OSS Distributions 	char c;
123*43a90889SApple OSS Distributions 	unsigned int b : 5;
124*43a90889SApple OSS Distributions 	test_shared_ptr<int> ptr __attribute__((packed));
125*43a90889SApple OSS Distributions 	int i;
126*43a90889SApple OSS Distributions };
127*43a90889SApple OSS Distributions 
128*43a90889SApple OSS Distributions struct FooRaw {
129*43a90889SApple OSS Distributions 	char c;
130*43a90889SApple OSS Distributions 	unsigned int b : 5;
131*43a90889SApple OSS Distributions 	int* ptr __attribute__((packed));
132*43a90889SApple OSS Distributions 	int i;
133*43a90889SApple OSS Distributions };
134*43a90889SApple OSS Distributions 
135*43a90889SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
136*43a90889SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
137*43a90889SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
138*43a90889SApple OSS Distributions }
139*43a90889SApple OSS Distributions 
140*43a90889SApple OSS Distributions T_DECL(abi_size_alignment, "intrusive_shared_ptr.abi.size_alignment", T_META_TAG_VM_PREFERRED) {
141*43a90889SApple OSS Distributions 	T_PASS("intrusive_shared_ptr.abi.size_alignment compile-time tests passed");
142*43a90889SApple OSS Distributions }
143