linux-kernel - Re: [PATCH perf/core 03/11] perf: Add support to attach standard unique uprobe

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAADnVQLw3xcBcxRhjBeiPikfnnr+Cox1wJ_6AcSUqaduuHs02g@mail.gmail.com>
Date: Tue, 2 Sep 2025 09:13:17 -0700
From: Alexei Starovoitov <alexei.starovoitov@...il.com>
To: Jiri Olsa <jolsa@...nel.org>
Cc: Oleg Nesterov <oleg@...hat.com>, Masami Hiramatsu <mhiramat@...nel.org>, 
	Peter Zijlstra <peterz@...radead.org>, Andrii Nakryiko <andrii@...nel.org>, bpf <bpf@...r.kernel.org>, 
	LKML <linux-kernel@...r.kernel.org>, 
	linux-trace-kernel <linux-trace-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>, 
	Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>, 
	John Fastabend <john.fastabend@...il.com>, Hao Luo <haoluo@...gle.com>, 
	Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH perf/core 03/11] perf: Add support to attach standard
 unique uprobe

On Tue, Sep 2, 2025 at 7:38 AM Jiri Olsa <jolsa@...nel.org> wrote:
>
> Adding support to attach unique probe through perf uprobe pmu.
>
> Adding new 'unique' format attribute that allows to pass the
> request to create unique uprobe the uprobe consumer.
>
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  include/linux/trace_events.h    | 2 +-
>  kernel/events/core.c            | 8 ++++++--
>  kernel/trace/trace_event_perf.c | 4 ++--
>  kernel/trace/trace_probe.h      | 2 +-
>  kernel/trace/trace_uprobe.c     | 9 +++++----
>  5 files changed, 15 insertions(+), 10 deletions(-)
>
> diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
> index 04307a19cde3..1d35727fda27 100644
> --- a/include/linux/trace_events.h
> +++ b/include/linux/trace_events.h
> @@ -877,7 +877,7 @@ extern int bpf_get_kprobe_info(const struct perf_event *event,
>  #endif
>  #ifdef CONFIG_UPROBE_EVENTS
>  extern int  perf_uprobe_init(struct perf_event *event,
> -                            unsigned long ref_ctr_offset, bool is_retprobe);
> +                            unsigned long ref_ctr_offset, bool is_retprobe, bool is_unique);

In bpf land we don't allow multiple bool arguments any more.
It makes callsites hard to read/review/maintain.
Here I recommend to use enum flags as well.