e02feb3f1f
Add a test case to verify the fix for "prog->aux->dst_trampoline and tgt_prog is NULL" branch in bpf_tracing_prog_attach. The sequence of events: 1. load rawtp program 2. load fentry program with rawtp as target_fd 3. create tracing link for fentry program with target_fd = 0 4. repeat 3 Acked-by: Jiri Olsa <olsajiri@gmail.com> Acked-by: Song Liu <song@kernel.org> Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Link: https://lore.kernel.org/r/20240103190559.14750-5-9erthalion6@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
25 lines
578 B
C
25 lines
578 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2023 Red Hat, Inc. */
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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char _license[] SEC("license") = "GPL";
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/* Dummy fentry bpf prog for testing fentry attachment chains. It's going to be
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* a start of the chain.
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*/
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SEC("fentry/bpf_testmod_fentry_test1")
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int BPF_PROG(test1, int a)
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{
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return 0;
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}
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/* Dummy bpf prog for testing attach_btf presence when attaching an fentry
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* program.
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*/
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SEC("raw_tp/sys_enter")
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int BPF_PROG(fentry_target, struct pt_regs *regs, long id)
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{
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return 0;
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}
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