xref: /xnu-8796.141.3/tests/intrusive_shared_ptr_src/abi.size_alignment.cpp (revision 1b191cb58250d0705d8a51287127505aa4bc0789) 
1*1b191cb5SApple OSS Distributions //
2*1b191cb5SApple OSS Distributions // This tests that the alignment and size of a class are the same whether
3*1b191cb5SApple OSS Distributions // they have a `T*` or a shared pointer data member.
4*1b191cb5SApple OSS Distributions //
5*1b191cb5SApple OSS Distributions 
6*1b191cb5SApple OSS Distributions #include <libkern/c++/intrusive_shared_ptr.h>
7*1b191cb5SApple OSS Distributions #include "test_policy.h"
8*1b191cb5SApple OSS Distributions #include <cstddef>
9*1b191cb5SApple OSS Distributions #include <darwintest.h>
10*1b191cb5SApple OSS Distributions 
11*1b191cb5SApple OSS Distributions 
12*1b191cb5SApple OSS Distributions namespace ns1 {
13*1b191cb5SApple OSS Distributions struct FooShared {
14*1b191cb5SApple OSS Distributions 	test_shared_ptr<int> ptr;
15*1b191cb5SApple OSS Distributions };
16*1b191cb5SApple OSS Distributions 
17*1b191cb5SApple OSS Distributions struct FooRaw {
18*1b191cb5SApple OSS Distributions 	int* ptr;
19*1b191cb5SApple OSS Distributions };
20*1b191cb5SApple OSS Distributions 
21*1b191cb5SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
22*1b191cb5SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
23*1b191cb5SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
24*1b191cb5SApple OSS Distributions }
25*1b191cb5SApple OSS Distributions 
26*1b191cb5SApple OSS Distributions namespace ns2 {
27*1b191cb5SApple OSS Distributions struct FooShared {
28*1b191cb5SApple OSS Distributions 	int i;
29*1b191cb5SApple OSS Distributions 	test_shared_ptr<int> ptr;
30*1b191cb5SApple OSS Distributions };
31*1b191cb5SApple OSS Distributions 
32*1b191cb5SApple OSS Distributions struct FooRaw {
33*1b191cb5SApple OSS Distributions 	int i;
34*1b191cb5SApple OSS Distributions 	int* ptr;
35*1b191cb5SApple OSS Distributions };
36*1b191cb5SApple OSS Distributions 
37*1b191cb5SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
38*1b191cb5SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
39*1b191cb5SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
40*1b191cb5SApple OSS Distributions }
41*1b191cb5SApple OSS Distributions 
42*1b191cb5SApple OSS Distributions namespace ns3 {
43*1b191cb5SApple OSS Distributions struct FooShared {
44*1b191cb5SApple OSS Distributions 	char c;
45*1b191cb5SApple OSS Distributions 	test_shared_ptr<int> ptr;
46*1b191cb5SApple OSS Distributions 	int i;
47*1b191cb5SApple OSS Distributions };
48*1b191cb5SApple OSS Distributions 
49*1b191cb5SApple OSS Distributions struct FooRaw {
50*1b191cb5SApple OSS Distributions 	char c;
51*1b191cb5SApple OSS Distributions 	int* ptr;
52*1b191cb5SApple OSS Distributions 	int i;
53*1b191cb5SApple OSS Distributions };
54*1b191cb5SApple OSS Distributions 
55*1b191cb5SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
56*1b191cb5SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
57*1b191cb5SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
58*1b191cb5SApple OSS Distributions }
59*1b191cb5SApple OSS Distributions 
60*1b191cb5SApple OSS Distributions namespace ns4 {
61*1b191cb5SApple OSS Distributions struct FooShared {
62*1b191cb5SApple OSS Distributions 	char c;
63*1b191cb5SApple OSS Distributions 	unsigned int b : 5;
64*1b191cb5SApple OSS Distributions 	test_shared_ptr<int> ptr;
65*1b191cb5SApple OSS Distributions 	int i;
66*1b191cb5SApple OSS Distributions };
67*1b191cb5SApple OSS Distributions 
68*1b191cb5SApple OSS Distributions struct FooRaw {
69*1b191cb5SApple OSS Distributions 	char c;
70*1b191cb5SApple OSS Distributions 	unsigned int b : 5;
71*1b191cb5SApple OSS Distributions 	int* ptr;
72*1b191cb5SApple OSS Distributions 	int i;
73*1b191cb5SApple OSS Distributions };
74*1b191cb5SApple OSS Distributions 
75*1b191cb5SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
76*1b191cb5SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
77*1b191cb5SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
78*1b191cb5SApple OSS Distributions }
79*1b191cb5SApple OSS Distributions 
80*1b191cb5SApple OSS Distributions namespace ns5 {
81*1b191cb5SApple OSS Distributions struct __attribute__((packed)) FooShared {
82*1b191cb5SApple OSS Distributions 	char c;
83*1b191cb5SApple OSS Distributions 	unsigned int b : 5;
84*1b191cb5SApple OSS Distributions 	test_shared_ptr<int> ptr;
85*1b191cb5SApple OSS Distributions 	int i;
86*1b191cb5SApple OSS Distributions };
87*1b191cb5SApple OSS Distributions 
88*1b191cb5SApple OSS Distributions struct __attribute__((packed)) FooRaw {
89*1b191cb5SApple OSS Distributions 	char c;
90*1b191cb5SApple OSS Distributions 	unsigned int b : 5;
91*1b191cb5SApple OSS Distributions 	int* ptr;
92*1b191cb5SApple OSS Distributions 	int i;
93*1b191cb5SApple OSS Distributions };
94*1b191cb5SApple OSS Distributions 
95*1b191cb5SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
96*1b191cb5SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
97*1b191cb5SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
98*1b191cb5SApple OSS Distributions }
99*1b191cb5SApple OSS Distributions 
100*1b191cb5SApple OSS Distributions namespace ns6 {
101*1b191cb5SApple OSS Distributions struct FooShared {
102*1b191cb5SApple OSS Distributions 	char c;
103*1b191cb5SApple OSS Distributions 	unsigned int b : 5;
104*1b191cb5SApple OSS Distributions 	test_shared_ptr<int> ptr;
105*1b191cb5SApple OSS Distributions 	int i __attribute__((packed));
106*1b191cb5SApple OSS Distributions };
107*1b191cb5SApple OSS Distributions 
108*1b191cb5SApple OSS Distributions struct FooRaw {
109*1b191cb5SApple OSS Distributions 	char c;
110*1b191cb5SApple OSS Distributions 	unsigned int b : 5;
111*1b191cb5SApple OSS Distributions 	int* ptr;
112*1b191cb5SApple OSS Distributions 	int i __attribute__((packed));
113*1b191cb5SApple OSS Distributions };
114*1b191cb5SApple OSS Distributions 
115*1b191cb5SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
116*1b191cb5SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
117*1b191cb5SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
118*1b191cb5SApple OSS Distributions }
119*1b191cb5SApple OSS Distributions 
120*1b191cb5SApple OSS Distributions namespace ns7 {
121*1b191cb5SApple OSS Distributions struct FooShared {
122*1b191cb5SApple OSS Distributions 	char c;
123*1b191cb5SApple OSS Distributions 	unsigned int b : 5;
124*1b191cb5SApple OSS Distributions 	test_shared_ptr<int> ptr __attribute__((packed));
125*1b191cb5SApple OSS Distributions 	int i;
126*1b191cb5SApple OSS Distributions };
127*1b191cb5SApple OSS Distributions 
128*1b191cb5SApple OSS Distributions struct FooRaw {
129*1b191cb5SApple OSS Distributions 	char c;
130*1b191cb5SApple OSS Distributions 	unsigned int b : 5;
131*1b191cb5SApple OSS Distributions 	int* ptr __attribute__((packed));
132*1b191cb5SApple OSS Distributions 	int i;
133*1b191cb5SApple OSS Distributions };
134*1b191cb5SApple OSS Distributions 
135*1b191cb5SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
136*1b191cb5SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
137*1b191cb5SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
138*1b191cb5SApple OSS Distributions }
139*1b191cb5SApple OSS Distributions 
140*1b191cb5SApple OSS Distributions T_DECL(abi_size_alignment, "intrusive_shared_ptr.abi.size_alignment") {
141*1b191cb5SApple OSS Distributions 	T_PASS("intrusive_shared_ptr.abi.size_alignment compile-time tests passed");
142*1b191cb5SApple OSS Distributions }
143