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From: Martin KaFai Lau <kafai@fb.com>
To: Andrii Nakryiko <andriin@fb.com>
Cc: <bpf@vger.kernel.org>, <netdev@vger.kernel.org>, <ast@fb.com>,
	<daniel@iogearbox.net>, <andrii.nakryiko@gmail.com>,
	<kernel-team@fb.com>
Subject: Re: [PATCH bpf-next 0/4] CO-RE candidate matching fix and tracing test
Date: Fri, 13 Mar 2020 10:47:19 -0700	[thread overview]
Message-ID: <20200313174719.3rgo75kkewunndnl@kafai-mbp> (raw)
In-Reply-To: <20200313172336.1879637-1-andriin@fb.com>

On Fri, Mar 13, 2020 at 10:23:32AM -0700, Andrii Nakryiko wrote:
> This patch set fixes bug in CO-RE relocation candidate finding logic, which
> currently allows matching against forward declarations, functions, and other
> named types, even though it makes no sense to even attempt. As part of
> verifying the fix, add test using vmlinux.h with preserve_access_index
> attribute and utilizing struct pt_regs heavily to trace nanosleep syscall
> using 5 different types of tracing BPF programs.
> 
> This test also demonstrated problems using struct pt_regs in syscall
> tracepoints and required a new set of macro, which were added in patch #3 into
> bpf_tracing.h.
> 
> Patch #1 fixes annoying issue with selftest failure messages being out of
> sync.
> 
> v1->v2:
> - drop unused handle__probed() function (Martin).
Acked-by: Martin KaFai Lau <kafai@fb.com>

  parent reply	other threads:[~2020-03-13 17:47 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-13 17:23 [PATCH bpf-next 0/4] CO-RE candidate matching fix and tracing test Andrii Nakryiko
2020-03-13 17:23 ` [PATCH bpf-next 1/4] selftests/bpf: ensure consistent test failure output Andrii Nakryiko
2020-03-13 17:23 ` [PATCH bpf-next 2/4] libbpf: ignore incompatible types with matching name during CO-RE relocation Andrii Nakryiko
2020-03-13 17:23 ` [PATCH bpf-next 3/4] libbpf: provide CO-RE variants of PT_REGS macros Andrii Nakryiko
2020-03-13 17:23 ` [PATCH bpf-next 4/4] selftests/bpf: add vmlinux.h selftest exercising tracing of syscalls Andrii Nakryiko
2020-03-13 17:47 ` Martin KaFai Lau [this message]
2020-03-13 22:36 ` [PATCH bpf-next 0/4] CO-RE candidate matching fix and tracing test Daniel Borkmann
  -- strict thread matches above, loose matches on Subject: below --
2020-03-13  7:54 Andrii Nakryiko

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