c8ed668593
Once we enable -Wall for BPF sources, compiler will complain about lots of unused variables, variables that are set but never read, etc. Fix all these issues first before enabling -Wall in Makefile. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20230309054015.4068562-4-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
31 lines
679 B
C
31 lines
679 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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#include <bpf/usdt.bpf.h>
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/* this file is linked together with test_usdt.c to validate that usdt.bpf.h
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* can be included in multiple .bpf.c files forming single final BPF object
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* file
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*/
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extern int my_pid;
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int usdt_100_called;
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int usdt_100_sum;
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SEC("usdt//proc/self/exe:test:usdt_100")
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int BPF_USDT(usdt_100, int x)
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{
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if (my_pid != (bpf_get_current_pid_tgid() >> 32))
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return 0;
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__sync_fetch_and_add(&usdt_100_called, 1);
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__sync_fetch_and_add(&usdt_100_sum, x);
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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