28 lines
611 B
C
28 lines
611 B
C
#include <linux/ptrace.h>
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#include <linux/version.h>
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#include <uapi/linux/bpf.h>
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#include "bpf_helpers.h"
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struct bpf_map_def SEC("maps") my_map = {
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.type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
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.key_size = sizeof(int),
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.value_size = sizeof(u32),
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.max_entries = 32,
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};
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SEC("kprobe/sys_write")
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int bpf_prog1(struct pt_regs *ctx)
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{
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u64 count;
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u32 key = bpf_get_smp_processor_id();
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char fmt[] = "CPU-%d %llu\n";
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count = bpf_perf_event_read(&my_map, key);
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bpf_trace_printk(fmt, sizeof(fmt), key, count);
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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") = LINUX_VERSION_CODE;
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