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