26 lines
596 B
C
26 lines
596 B
C
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2019 Facebook
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#include <linux/ptrace.h>
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#include <linux/bpf.h>
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#include "bpf_helpers.h"
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struct {
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__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
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__uint(key_size, sizeof(int));
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__uint(value_size, sizeof(int));
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} perf_buf_map SEC(".maps");
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SEC("kprobe/sys_nanosleep")
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int handle_sys_nanosleep_entry(struct pt_regs *ctx)
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{
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int cpu = bpf_get_smp_processor_id();
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bpf_perf_event_output(ctx, &perf_buf_map, BPF_F_CURRENT_CPU,
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&cpu, sizeof(cpu));
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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__u32 _version SEC("version") = 1;
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