xref: /xnu-8020.101.4/tests/intrusive_shared_ptr_src/abi.size_alignment.cpp (revision e7776783b89a353188416a9a346c6cdb4928faad) 
1*e7776783SApple OSS Distributions //
2*e7776783SApple OSS Distributions // This tests that the alignment and size of a class are the same whether
3*e7776783SApple OSS Distributions // they have a `T*` or a shared pointer data member.
4*e7776783SApple OSS Distributions //
5*e7776783SApple OSS Distributions 
6*e7776783SApple OSS Distributions #include <libkern/c++/intrusive_shared_ptr.h>
7*e7776783SApple OSS Distributions #include "test_policy.h"
8*e7776783SApple OSS Distributions #include <cstddef>
9*e7776783SApple OSS Distributions #include <darwintest.h>
10*e7776783SApple OSS Distributions 
11*e7776783SApple OSS Distributions 
12*e7776783SApple OSS Distributions namespace ns1 {
13*e7776783SApple OSS Distributions struct FooShared {
14*e7776783SApple OSS Distributions 	test_shared_ptr<int> ptr;
15*e7776783SApple OSS Distributions };
16*e7776783SApple OSS Distributions 
17*e7776783SApple OSS Distributions struct FooRaw {
18*e7776783SApple OSS Distributions 	int* ptr;
19*e7776783SApple OSS Distributions };
20*e7776783SApple OSS Distributions 
21*e7776783SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
22*e7776783SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
23*e7776783SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
24*e7776783SApple OSS Distributions }
25*e7776783SApple OSS Distributions 
26*e7776783SApple OSS Distributions namespace ns2 {
27*e7776783SApple OSS Distributions struct FooShared {
28*e7776783SApple OSS Distributions 	int i;
29*e7776783SApple OSS Distributions 	test_shared_ptr<int> ptr;
30*e7776783SApple OSS Distributions };
31*e7776783SApple OSS Distributions 
32*e7776783SApple OSS Distributions struct FooRaw {
33*e7776783SApple OSS Distributions 	int i;
34*e7776783SApple OSS Distributions 	int* ptr;
35*e7776783SApple OSS Distributions };
36*e7776783SApple OSS Distributions 
37*e7776783SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
38*e7776783SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
39*e7776783SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
40*e7776783SApple OSS Distributions }
41*e7776783SApple OSS Distributions 
42*e7776783SApple OSS Distributions namespace ns3 {
43*e7776783SApple OSS Distributions struct FooShared {
44*e7776783SApple OSS Distributions 	char c;
45*e7776783SApple OSS Distributions 	test_shared_ptr<int> ptr;
46*e7776783SApple OSS Distributions 	int i;
47*e7776783SApple OSS Distributions };
48*e7776783SApple OSS Distributions 
49*e7776783SApple OSS Distributions struct FooRaw {
50*e7776783SApple OSS Distributions 	char c;
51*e7776783SApple OSS Distributions 	int* ptr;
52*e7776783SApple OSS Distributions 	int i;
53*e7776783SApple OSS Distributions };
54*e7776783SApple OSS Distributions 
55*e7776783SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
56*e7776783SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
57*e7776783SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
58*e7776783SApple OSS Distributions }
59*e7776783SApple OSS Distributions 
60*e7776783SApple OSS Distributions namespace ns4 {
61*e7776783SApple OSS Distributions struct FooShared {
62*e7776783SApple OSS Distributions 	char c;
63*e7776783SApple OSS Distributions 	unsigned int b : 5;
64*e7776783SApple OSS Distributions 	test_shared_ptr<int> ptr;
65*e7776783SApple OSS Distributions 	int i;
66*e7776783SApple OSS Distributions };
67*e7776783SApple OSS Distributions 
68*e7776783SApple OSS Distributions struct FooRaw {
69*e7776783SApple OSS Distributions 	char c;
70*e7776783SApple OSS Distributions 	unsigned int b : 5;
71*e7776783SApple OSS Distributions 	int* ptr;
72*e7776783SApple OSS Distributions 	int i;
73*e7776783SApple OSS Distributions };
74*e7776783SApple OSS Distributions 
75*e7776783SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
76*e7776783SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
77*e7776783SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
78*e7776783SApple OSS Distributions }
79*e7776783SApple OSS Distributions 
80*e7776783SApple OSS Distributions namespace ns5 {
81*e7776783SApple OSS Distributions struct __attribute__((packed)) FooShared {
82*e7776783SApple OSS Distributions 	char c;
83*e7776783SApple OSS Distributions 	unsigned int b : 5;
84*e7776783SApple OSS Distributions 	test_shared_ptr<int> ptr;
85*e7776783SApple OSS Distributions 	int i;
86*e7776783SApple OSS Distributions };
87*e7776783SApple OSS Distributions 
88*e7776783SApple OSS Distributions struct __attribute__((packed)) FooRaw {
89*e7776783SApple OSS Distributions 	char c;
90*e7776783SApple OSS Distributions 	unsigned int b : 5;
91*e7776783SApple OSS Distributions 	int* ptr;
92*e7776783SApple OSS Distributions 	int i;
93*e7776783SApple OSS Distributions };
94*e7776783SApple OSS Distributions 
95*e7776783SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
96*e7776783SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
97*e7776783SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
98*e7776783SApple OSS Distributions }
99*e7776783SApple OSS Distributions 
100*e7776783SApple OSS Distributions namespace ns6 {
101*e7776783SApple OSS Distributions struct FooShared {
102*e7776783SApple OSS Distributions 	char c;
103*e7776783SApple OSS Distributions 	unsigned int b : 5;
104*e7776783SApple OSS Distributions 	test_shared_ptr<int> ptr;
105*e7776783SApple OSS Distributions 	int i __attribute__((packed));
106*e7776783SApple OSS Distributions };
107*e7776783SApple OSS Distributions 
108*e7776783SApple OSS Distributions struct FooRaw {
109*e7776783SApple OSS Distributions 	char c;
110*e7776783SApple OSS Distributions 	unsigned int b : 5;
111*e7776783SApple OSS Distributions 	int* ptr;
112*e7776783SApple OSS Distributions 	int i __attribute__((packed));
113*e7776783SApple OSS Distributions };
114*e7776783SApple OSS Distributions 
115*e7776783SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
116*e7776783SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
117*e7776783SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
118*e7776783SApple OSS Distributions }
119*e7776783SApple OSS Distributions 
120*e7776783SApple OSS Distributions namespace ns7 {
121*e7776783SApple OSS Distributions struct FooShared {
122*e7776783SApple OSS Distributions 	char c;
123*e7776783SApple OSS Distributions 	unsigned int b : 5;
124*e7776783SApple OSS Distributions 	test_shared_ptr<int> ptr __attribute__((packed));
125*e7776783SApple OSS Distributions 	int i;
126*e7776783SApple OSS Distributions };
127*e7776783SApple OSS Distributions 
128*e7776783SApple OSS Distributions struct FooRaw {
129*e7776783SApple OSS Distributions 	char c;
130*e7776783SApple OSS Distributions 	unsigned int b : 5;
131*e7776783SApple OSS Distributions 	int* ptr __attribute__((packed));
132*e7776783SApple OSS Distributions 	int i;
133*e7776783SApple OSS Distributions };
134*e7776783SApple OSS Distributions 
135*e7776783SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
136*e7776783SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
137*e7776783SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
138*e7776783SApple OSS Distributions }
139*e7776783SApple OSS Distributions 
140*e7776783SApple OSS Distributions T_DECL(abi_size_alignment, "intrusive_shared_ptr.abi.size_alignment") {
141*e7776783SApple OSS Distributions 	T_PASS("intrusive_shared_ptr.abi.size_alignment compile-time tests passed");
142*e7776783SApple OSS Distributions }
143