diff options
Diffstat (limited to 'tools/testing/selftests/bpf/test_stacktrace_map.c')
-rw-r--r-- | tools/testing/selftests/bpf/test_stacktrace_map.c | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/tools/testing/selftests/bpf/test_stacktrace_map.c b/tools/testing/selftests/bpf/test_stacktrace_map.c deleted file mode 100644 index af111af7ca1a..000000000000 --- a/tools/testing/selftests/bpf/test_stacktrace_map.c +++ /dev/null @@ -1,75 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -// Copyright (c) 2018 Facebook - -#include <linux/bpf.h> -#include "bpf_helpers.h" - -#ifndef PERF_MAX_STACK_DEPTH -#define PERF_MAX_STACK_DEPTH 127 -#endif - -struct bpf_map_def SEC("maps") control_map = { - .type = BPF_MAP_TYPE_ARRAY, - .key_size = sizeof(__u32), - .value_size = sizeof(__u32), - .max_entries = 1, -}; - -struct bpf_map_def SEC("maps") stackid_hmap = { - .type = BPF_MAP_TYPE_HASH, - .key_size = sizeof(__u32), - .value_size = sizeof(__u32), - .max_entries = 16384, -}; - -struct bpf_map_def SEC("maps") stackmap = { - .type = BPF_MAP_TYPE_STACK_TRACE, - .key_size = sizeof(__u32), - .value_size = sizeof(__u64) * PERF_MAX_STACK_DEPTH, - .max_entries = 16384, -}; - -struct bpf_map_def SEC("maps") stack_amap = { - .type = BPF_MAP_TYPE_ARRAY, - .key_size = sizeof(__u32), - .value_size = sizeof(__u64) * PERF_MAX_STACK_DEPTH, - .max_entries = 16384, -}; - -/* taken from /sys/kernel/debug/tracing/events/sched/sched_switch/format */ -struct sched_switch_args { - unsigned long long pad; - char prev_comm[16]; - int prev_pid; - int prev_prio; - long long prev_state; - char next_comm[16]; - int next_pid; - int next_prio; -}; - -SEC("tracepoint/sched/sched_switch") -int oncpu(struct sched_switch_args *ctx) -{ - __u32 max_len = PERF_MAX_STACK_DEPTH * sizeof(__u64); - __u32 key = 0, val = 0, *value_p; - void *stack_p; - - value_p = bpf_map_lookup_elem(&control_map, &key); - if (value_p && *value_p) - return 0; /* skip if non-zero *value_p */ - - /* The size of stackmap and stackid_hmap should be the same */ - key = bpf_get_stackid(ctx, &stackmap, 0); - if ((int)key >= 0) { - bpf_map_update_elem(&stackid_hmap, &key, &val, 0); - stack_p = bpf_map_lookup_elem(&stack_amap, &key); - if (stack_p) - bpf_get_stack(ctx, stack_p, max_len, 0); - } - - return 0; -} - -char _license[] SEC("license") = "GPL"; -__u32 _version SEC("version") = 1; /* ignored by tracepoints, required by libbpf.a */ |