From: Daniel Xu <dxu@dxuuu.xyz>
To: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@kernel.org>, X86 ML <x86@kernel.org>,
linux-kernel@vger.kernel.org, bpf@vger.kernel.org,
kuba@kernel.org, mingo@redhat.com, ast@kernel.org,
tglx@linutronix.de, kernel-team@fb.com, yhs@fb.com
Subject: Re: [PATCH -tip 0/5] kprobes: Fix stacktrace in kretprobes
Date: Wed, 10 Mar 2021 14:46:14 -0800 [thread overview]
Message-ID: <20210310224614.7piyiurdiiumqa5e@dlxu-fedora-R90QNFJV> (raw)
In-Reply-To: <20210311005509.0a1a65df0d2d6c7da73a9288@kernel.org>
On Thu, Mar 11, 2021 at 12:55:09AM +0900, Masami Hiramatsu wrote:
> Hi Josh and Daniel,
<...>
> commit aa452d999b524b1851f69cc947be3e1a2f3ca1ec
> Author: Masami Hiramatsu <mhiramat@kernel.org>
> Date: Sat Mar 6 08:34:51 2021 +0900
>
> x86/unwind/orc: Fixup kretprobe trampoline entry
>
> Since the kretprobe replaces the function return address with
> the kretprobe_trampoline on the stack, the ORC unwinder can not
> continue the stack unwinding at that point.
>
> To fix this issue, correct state->ip as like as function-graph
> tracer in the unwind_next_frame().
>
> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
>
I applied your original patchset + Josh's patch + this patch and can
confirm it works for bpftrace + kretprobes.
Tested-by: Daniel Xu <dxu@dxuuu.xyz>
next prev parent reply other threads:[~2021-03-10 22:47 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-05 15:38 [PATCH -tip 0/5] kprobes: Fix stacktrace in kretprobes Masami Hiramatsu
2021-03-05 15:39 ` [PATCH -tip 1/5] ia64: kprobes: Fix to pass correct trampoline address to the handler Masami Hiramatsu
2021-03-05 15:39 ` [PATCH -tip 2/5] kprobes: treewide: Replace arch_deref_entry_point() with dereference_function_descriptor() Masami Hiramatsu
2021-03-05 15:39 ` [PATCH -tip 3/5] kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_handler() Masami Hiramatsu
2021-03-10 14:21 ` Miroslav Benes
2021-03-10 15:42 ` Masami Hiramatsu
2021-03-11 13:37 ` Masami Hiramatsu
2021-03-05 15:39 ` [PATCH -tip 4/5] kprobes: stacktrace: Recover the address changed by kretprobe Masami Hiramatsu
2021-03-05 15:39 ` [PATCH -tip 5/5] tracing: Remove kretprobe unknown indicator from stacktrace Masami Hiramatsu
2021-03-05 15:44 ` Steven Rostedt
2021-03-05 19:16 ` [PATCH -tip 0/5] kprobes: Fix stacktrace in kretprobes Daniel Xu
2021-03-06 1:13 ` Masami Hiramatsu
2021-03-07 21:23 ` Daniel Xu
2021-03-08 2:52 ` Masami Hiramatsu
2021-03-08 13:05 ` Masami Hiramatsu
2021-03-09 1:19 ` Josh Poimboeuf
2021-03-10 9:57 ` Masami Hiramatsu
2021-03-10 15:08 ` Josh Poimboeuf
2021-03-10 15:55 ` Masami Hiramatsu
2021-03-10 18:31 ` Josh Poimboeuf
2021-03-11 0:20 ` Masami Hiramatsu
2021-03-11 1:06 ` Josh Poimboeuf
2021-03-11 1:54 ` Masami Hiramatsu
2021-03-11 16:51 ` Josh Poimboeuf
2021-03-12 3:22 ` Masami Hiramatsu
2021-03-10 22:46 ` Daniel Xu [this message]
2021-03-09 21:34 ` Daniel Xu
2021-03-10 10:50 ` Masami Hiramatsu
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