atomics.c (4166B)
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 8bool skip_tests __attribute((__section__(".data"))) = false; 9#else 10bool 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 23SEC("raw_tp/sys_enter") 24int 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 49SEC("raw_tp/sys_enter") 50int 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 73SEC("raw_tp/sys_enter") 74int 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 94SEC("raw_tp/sys_enter") 95int 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 114SEC("raw_tp/sys_enter") 115int 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 135SEC("raw_tp/sys_enter") 136int 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 156SEC("raw_tp/sys_enter") 157int 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}