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// Copyright (c) 2016 Allan McAleavy.
// Copyright (c) 2015 Brendan Gregg.
// Licensed under the Apache License, Version 2.0 (the "License")
#include <uapi/linux/ptrace.h>
struct key_t {
u64 ip;
};
BPF_HASH(counts, struct key_t);
int do_count(struct pt_regs *ctx) {
struct key_t key = {};
u64 zero = 0, *val;
u64 ip;
key.ip = PT_REGS_IP(ctx);
val = counts.lookup_or_init(&key, &zero); // update counter
if (val) {
(*val)++;
}
return 0;
}