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Date: Mon, 24 Aug 2020 17:05:22 -0700 From: Hao Luo <haoluo@...gle.com> To: Yonghong Song <yhs@...com> Cc: Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>, open list <linux-kernel@...r.kernel.org>, "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@...r.kernel.org>, Shuah Khan <shuah@...nel.org>, Alexei Starovoitov <ast@...nel.org>, Andrii Nakryiko <andriin@...com>, Daniel Borkmann <daniel@...earbox.net>, Martin KaFai Lau <kafai@...com>, Song Liu <songliubraving@...com>, John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...omium.org>, Quentin Monnet <quentin@...valent.com>, Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...hat.com>, Andrey Ignatov <rdna@...com>, Jakub Sitnicki <jakub@...udflare.com> Subject: Re: [PATCH bpf-next v1 1/8] bpf: Introduce pseudo_btf_id Yonghong, An update on this thread. I successfully reproduced this issue on a 8.2.0 gcc compiler, It looks like gcc 4.9 did not have this issue. I was also using clang which did not show this bug. It seems having a DW_AT_specification that refers to another DW_TAG_variable isn't handled in pahole. I have a (maybe hacky) pahole patch as fix and let me clean it up and post for review soon. Hao
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