diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/arena_atomics.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/arena_atomics.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/arena_atomics.c b/tools/testing/selftests/bpf/progs/arena_atomics.c new file mode 100644 index 0000000000..55f1056320 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/arena_atomics.c @@ -0,0 +1,178 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */ +#include <linux/bpf.h> +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> +#include <stdbool.h> +#include "bpf_arena_common.h" + +struct { + __uint(type, BPF_MAP_TYPE_ARENA); + __uint(map_flags, BPF_F_MMAPABLE); + __uint(max_entries, 10); /* number of pages */ +#ifdef __TARGET_ARCH_arm64 + __ulong(map_extra, 0x1ull << 32); /* start of mmap() region */ +#else + __ulong(map_extra, 0x1ull << 44); /* start of mmap() region */ +#endif +} arena SEC(".maps"); + +#if defined(ENABLE_ATOMICS_TESTS) && defined(__BPF_FEATURE_ADDR_SPACE_CAST) +bool skip_tests __attribute((__section__(".data"))) = false; +#else +bool skip_tests = true; +#endif + +__u32 pid = 0; + +#undef __arena +#if defined(__BPF_FEATURE_ADDR_SPACE_CAST) +#define __arena __attribute__((address_space(1))) +#else +#define __arena SEC(".addr_space.1") +#endif + +__u64 __arena add64_value = 1; +__u64 __arena add64_result = 0; +__u32 __arena add32_value = 1; +__u32 __arena add32_result = 0; +__u64 __arena add_stack_value_copy = 0; +__u64 __arena add_stack_result = 0; +__u64 __arena add_noreturn_value = 1; + +SEC("raw_tp/sys_enter") +int add(const void *ctx) +{ + if (pid != (bpf_get_current_pid_tgid() >> 32)) + return 0; +#ifdef ENABLE_ATOMICS_TESTS + __u64 add_stack_value = 1; + + add64_result = __sync_fetch_and_add(&add64_value, 2); + add32_result = __sync_fetch_and_add(&add32_value, 2); + add_stack_result = __sync_fetch_and_add(&add_stack_value, 2); + add_stack_value_copy = add_stack_value; + __sync_fetch_and_add(&add_noreturn_value, 2); +#endif + + return 0; +} + +__s64 __arena sub64_value = 1; +__s64 __arena sub64_result = 0; +__s32 __arena sub32_value = 1; +__s32 __arena sub32_result = 0; +__s64 __arena sub_stack_value_copy = 0; +__s64 __arena sub_stack_result = 0; +__s64 __arena sub_noreturn_value = 1; + +SEC("raw_tp/sys_enter") +int sub(const void *ctx) +{ + if (pid != (bpf_get_current_pid_tgid() >> 32)) + return 0; +#ifdef ENABLE_ATOMICS_TESTS + __u64 sub_stack_value = 1; + + sub64_result = __sync_fetch_and_sub(&sub64_value, 2); + sub32_result = __sync_fetch_and_sub(&sub32_value, 2); + sub_stack_result = __sync_fetch_and_sub(&sub_stack_value, 2); + sub_stack_value_copy = sub_stack_value; + __sync_fetch_and_sub(&sub_noreturn_value, 2); +#endif + + return 0; +} + +__u64 __arena and64_value = (0x110ull << 32); +__u32 __arena and32_value = 0x110; + +SEC("raw_tp/sys_enter") +int and(const void *ctx) +{ + if (pid != (bpf_get_current_pid_tgid() >> 32)) + return 0; +#ifdef ENABLE_ATOMICS_TESTS + + __sync_fetch_and_and(&and64_value, 0x011ull << 32); + __sync_fetch_and_and(&and32_value, 0x011); +#endif + + return 0; +} + +__u32 __arena or32_value = 0x110; +__u64 __arena or64_value = (0x110ull << 32); + +SEC("raw_tp/sys_enter") +int or(const void *ctx) +{ + if (pid != (bpf_get_current_pid_tgid() >> 32)) + return 0; +#ifdef ENABLE_ATOMICS_TESTS + __sync_fetch_and_or(&or64_value, 0x011ull << 32); + __sync_fetch_and_or(&or32_value, 0x011); +#endif + + return 0; +} + +__u64 __arena xor64_value = (0x110ull << 32); +__u32 __arena xor32_value = 0x110; + +SEC("raw_tp/sys_enter") +int xor(const void *ctx) +{ + if (pid != (bpf_get_current_pid_tgid() >> 32)) + return 0; +#ifdef ENABLE_ATOMICS_TESTS + __sync_fetch_and_xor(&xor64_value, 0x011ull << 32); + __sync_fetch_and_xor(&xor32_value, 0x011); +#endif + + return 0; +} + +__u32 __arena cmpxchg32_value = 1; +__u32 __arena cmpxchg32_result_fail = 0; +__u32 __arena cmpxchg32_result_succeed = 0; +__u64 __arena cmpxchg64_value = 1; +__u64 __arena cmpxchg64_result_fail = 0; +__u64 __arena cmpxchg64_result_succeed = 0; + +SEC("raw_tp/sys_enter") +int cmpxchg(const void *ctx) +{ + if (pid != (bpf_get_current_pid_tgid() >> 32)) + return 0; +#ifdef ENABLE_ATOMICS_TESTS + cmpxchg64_result_fail = __sync_val_compare_and_swap(&cmpxchg64_value, 0, 3); + cmpxchg64_result_succeed = __sync_val_compare_and_swap(&cmpxchg64_value, 1, 2); + + cmpxchg32_result_fail = __sync_val_compare_and_swap(&cmpxchg32_value, 0, 3); + cmpxchg32_result_succeed = __sync_val_compare_and_swap(&cmpxchg32_value, 1, 2); +#endif + + return 0; +} + +__u64 __arena xchg64_value = 1; +__u64 __arena xchg64_result = 0; +__u32 __arena xchg32_value = 1; +__u32 __arena xchg32_result = 0; + +SEC("raw_tp/sys_enter") +int xchg(const void *ctx) +{ + if (pid != (bpf_get_current_pid_tgid() >> 32)) + return 0; +#ifdef ENABLE_ATOMICS_TESTS + __u64 val64 = 2; + __u32 val32 = 2; + + xchg64_result = __sync_lock_test_and_set(&xchg64_value, val64); + xchg32_result = __sync_lock_test_and_set(&xchg32_value, val32); +#endif + + return 0; +} |