1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/bpf.h>
3 #include <bpf/bpf_helpers.h>
4 #include <bpf/bpf_tracing.h>
5 #include <stdbool.h>
6
7 #ifdef ENABLE_ATOMICS_TESTS
8 bool skip_tests __attribute((__section__(".data"))) = false;
9 #else
10 bool skip_tests = true;
11 #endif
12
13 __u32 pid = 0;
14
15 __u64 add64_value = 1;
16 __u64 add64_result = 0;
17 __u32 add32_value = 1;
18 __u32 add32_result = 0;
19 __u64 add_stack_value_copy = 0;
20 __u64 add_stack_result = 0;
21 __u64 add_noreturn_value = 1;
22
23 SEC("raw_tp/sys_enter")
24 int add(const void *ctx)
25 {
26 if (pid != (bpf_get_current_pid_tgid() >> 32))
27 return 0;
28 #ifdef ENABLE_ATOMICS_TESTS
29 __u64 add_stack_value = 1;
30
31 add64_result = __sync_fetch_and_add(&add64_value, 2);
32 add32_result = __sync_fetch_and_add(&add32_value, 2);
33 add_stack_result = __sync_fetch_and_add(&add_stack_value, 2);
34 add_stack_value_copy = add_stack_value;
35 __sync_fetch_and_add(&add_noreturn_value, 2);
36 #endif
37
38 return 0;
39 }
40
41 __s64 sub64_value = 1;
42 __s64 sub64_result = 0;
43 __s32 sub32_value = 1;
44 __s32 sub32_result = 0;
45 __s64 sub_stack_value_copy = 0;
46 __s64 sub_stack_result = 0;
47 __s64 sub_noreturn_value = 1;
48
49 SEC("raw_tp/sys_enter")
50 int sub(const void *ctx)
51 {
52 if (pid != (bpf_get_current_pid_tgid() >> 32))
53 return 0;
54 #ifdef ENABLE_ATOMICS_TESTS
55 __u64 sub_stack_value = 1;
56
57 sub64_result = __sync_fetch_and_sub(&sub64_value, 2);
58 sub32_result = __sync_fetch_and_sub(&sub32_value, 2);
59 sub_stack_result = __sync_fetch_and_sub(&sub_stack_value, 2);
60 sub_stack_value_copy = sub_stack_value;
61 __sync_fetch_and_sub(&sub_noreturn_value, 2);
62 #endif
63
64 return 0;
65 }
66
67 __u64 and64_value = (0x110ull << 32);
68 __u64 and64_result = 0;
69 __u32 and32_value = 0x110;
70 __u32 and32_result = 0;
71 __u64 and_noreturn_value = (0x110ull << 32);
72
73 SEC("raw_tp/sys_enter")
74 int and(const void *ctx)
75 {
76 if (pid != (bpf_get_current_pid_tgid() >> 32))
77 return 0;
78 #ifdef ENABLE_ATOMICS_TESTS
79
80 and64_result = __sync_fetch_and_and(&and64_value, 0x011ull << 32);
81 and32_result = __sync_fetch_and_and(&and32_value, 0x011);
82 __sync_fetch_and_and(&and_noreturn_value, 0x011ull << 32);
83 #endif
84
85 return 0;
86 }
87
88 __u64 or64_value = (0x110ull << 32);
89 __u64 or64_result = 0;
90 __u32 or32_value = 0x110;
91 __u32 or32_result = 0;
92 __u64 or_noreturn_value = (0x110ull << 32);
93
94 SEC("raw_tp/sys_enter")
95 int or(const void *ctx)
96 {
97 if (pid != (bpf_get_current_pid_tgid() >> 32))
98 return 0;
99 #ifdef ENABLE_ATOMICS_TESTS
100 or64_result = __sync_fetch_and_or(&or64_value, 0x011ull << 32);
101 or32_result = __sync_fetch_and_or(&or32_value, 0x011);
102 __sync_fetch_and_or(&or_noreturn_value, 0x011ull << 32);
103 #endif
104
105 return 0;
106 }
107
108 __u64 xor64_value = (0x110ull << 32);
109 __u64 xor64_result = 0;
110 __u32 xor32_value = 0x110;
111 __u32 xor32_result = 0;
112 __u64 xor_noreturn_value = (0x110ull << 32);
113
114 SEC("raw_tp/sys_enter")
115 int xor(const void *ctx)
116 {
117 if (pid != (bpf_get_current_pid_tgid() >> 32))
118 return 0;
119 #ifdef ENABLE_ATOMICS_TESTS
120 xor64_result = __sync_fetch_and_xor(&xor64_value, 0x011ull << 32);
121 xor32_result = __sync_fetch_and_xor(&xor32_value, 0x011);
122 __sync_fetch_and_xor(&xor_noreturn_value, 0x011ull << 32);
123 #endif
124
125 return 0;
126 }
127
128 __u64 cmpxchg64_value = 1;
129 __u64 cmpxchg64_result_fail = 0;
130 __u64 cmpxchg64_result_succeed = 0;
131 __u32 cmpxchg32_value = 1;
132 __u32 cmpxchg32_result_fail = 0;
133 __u32 cmpxchg32_result_succeed = 0;
134
135 SEC("raw_tp/sys_enter")
136 int cmpxchg(const void *ctx)
137 {
138 if (pid != (bpf_get_current_pid_tgid() >> 32))
139 return 0;
140 #ifdef ENABLE_ATOMICS_TESTS
141 cmpxchg64_result_fail = __sync_val_compare_and_swap(&cmpxchg64_value, 0, 3);
142 cmpxchg64_result_succeed = __sync_val_compare_and_swap(&cmpxchg64_value, 1, 2);
143
144 cmpxchg32_result_fail = __sync_val_compare_and_swap(&cmpxchg32_value, 0, 3);
145 cmpxchg32_result_succeed = __sync_val_compare_and_swap(&cmpxchg32_value, 1, 2);
146 #endif
147
148 return 0;
149 }
150
151 __u64 xchg64_value = 1;
152 __u64 xchg64_result = 0;
153 __u32 xchg32_value = 1;
154 __u32 xchg32_result = 0;
155
156 SEC("raw_tp/sys_enter")
157 int xchg(const void *ctx)
158 {
159 if (pid != (bpf_get_current_pid_tgid() >> 32))
160 return 0;
161 #ifdef ENABLE_ATOMICS_TESTS
162 __u64 val64 = 2;
163 __u32 val32 = 2;
164
165 xchg64_result = __sync_lock_test_and_set(&xchg64_value, val64);
166 xchg32_result = __sync_lock_test_and_set(&xchg32_value, val32);
167 #endif
168
169 return 0;
170 }
171
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