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libbpf: Fix uretprobe.multi.s programs auto attachment

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As reported by Andrii we don't currently recognize uretprobe.multi.s
programs as return probes due to using (wrong) strcmp function.

Using str_has_pfx() instead to match uretprobe.multi prefix.

Tests are passing, because the return program was executed
as entry program and all counts were incremented properly.

Reported-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20240910125336.3056271-1-jolsa@kernel.org
This commit is contained in:
Jiri Olsa 2024-09-10 14:53:36 +02:00 committed by Andrii Nakryiko
parent 41d0c4677f
commit 8c8b475974
1 changed files with 1 additions and 1 deletions
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2
tools/lib/bpf/libbpf.c
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@ -11688,7 +11688,7 @@ static int attach_uprobe_multi(const struct bpf_program *prog, long cookie, stru
ret = 0;
break;
case 3:
opts.retprobe = strcmp(probe_type, "uretprobe.multi") == 0;
opts.retprobe = str_has_pfx(probe_type, "uretprobe.multi");
*link = bpf_program__attach_uprobe_multi(prog, -1, binary_path, func_name, &opts);
ret = libbpf_get_error(*link);
break;