[PATCHv4 06/14] libbpf: Fix uretprobe.multi.s programs auto attachment

Jiri Olsa
2024-09-17T08:51:47Z

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
---
tools/lib/bpf/libbpf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 274441674f92..6917d4a0bd4e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -11684,7 +11684,7 @@ 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;
--
2.46.0