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synced 2026-08-29 01:04:14 -04:00
b349efe49a
Adding tests for the rollback code when the tracing_multi
link won't get attached, covering 2 reasons:
- wrong btf id passed by user, where all previously allocated
trampolines will be released
- trampoline for requested function is fully attached (has already
maximum programs attached) and the link fails, the rollback code
needs to release all previously link-ed trampolines and release
them
We need the bpf_fentry_test* unattached for the tests to pass,
so the rollback tests are serial.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20260606123955.345967-30-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
44 lines
655 B
C
44 lines
655 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <vmlinux.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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int pid = 0;
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__u64 test_result_fentry = 0;
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__u64 test_result_fexit = 0;
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SEC("?fentry.multi")
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int BPF_PROG(test_fentry)
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{
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if (bpf_get_current_pid_tgid() >> 32 != pid)
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return 0;
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test_result_fentry++;
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return 0;
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}
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SEC("?fexit.multi")
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int BPF_PROG(test_fexit)
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{
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if (bpf_get_current_pid_tgid() >> 32 != pid)
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return 0;
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test_result_fexit++;
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return 0;
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}
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SEC("?fentry/bpf_fentry_test1")
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int BPF_PROG(extra)
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{
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return 0;
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}
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SEC("?fentry/bpf_fentry_test10")
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int BPF_PROG(filler)
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{
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return 0;
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}
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