From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 273A2CA9EA0 for ; Wed, 23 Oct 2019 01:35:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DE1C021783 for ; Wed, 23 Oct 2019 01:35:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="UNwzboz1" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733217AbfJWBfQ (ORCPT ); Tue, 22 Oct 2019 21:35:16 -0400 Received: from mail-pf1-f196.google.com ([209.85.210.196]:36164 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732328AbfJWBfQ (ORCPT ); Tue, 22 Oct 2019 21:35:16 -0400 Received: by mail-pf1-f196.google.com with SMTP id y22so11832097pfr.3; Tue, 22 Oct 2019 18:35:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=to:from:subject:message-id:date:user-agent:mime-version :content-language:content-transfer-encoding; bh=sVxBR4j3UbPCGxSucg6YKBL4mZZkWsBKL7S+CBlzoj4=; b=UNwzboz1mUdLpVOtkcq9tNY6KSjXVug3okwsDTDIySbu8dQTtsxxqn50agPXUqaR3S OZhQ0G40mtQAWQLbM0EIMUPd7rT7MELl51wjxQOsbI2hqV+rZwwdA0+kq9Bq1W6R7h2J i6XU1IhzGh5zvVV0rc24v+eAA+RMW9E03zInWgQjBwhub2AodCWdbQyolK6JzBaMZMld Ku8m9AYhFnO+c+KR1npe96ROsYAHLQ79+6IZKqRCjxJye0fLar7Tldjv3TO5al4mVNLC sFbdC+TKrATW1l/S9QxhH0hkMZxAHi8cqQEiU4cdtOUoMvmobPZikzaPtzLx7GFyVL8T ggbQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:to:from:subject:message-id:date:user-agent :mime-version:content-language:content-transfer-encoding; bh=sVxBR4j3UbPCGxSucg6YKBL4mZZkWsBKL7S+CBlzoj4=; b=FteSLRwlR8c0X/hUBr1G7U+TEB2GgJfBhSYoMoyvjcyeB+mEdafXwqkM1G9EG8mUlC Q14IkjXLxitQ5r32OupObTjnrc6wxPQ2E1R1XNCxLqH6tpxK0w9E3MMhtzf74RMRid+x ReQeqjUz7VLP/xAaOHk1zCg4dge6hBaAh2QXy7bp+ZIf8e3NtrmsJLcLzH3aTcBQzSJx GGps5sRSBDXvwnV4juKNXHDssKkuVnHz+9f+P9InemihhH0ocyMIghDS7HxuHnqnJOeR GKKBO7Ki1QOxTt96KUzzXlogxLfl4FNOvqKjh0mgRotM+fOHxqglBkev7beMVmzoVsD2 oCSQ== X-Gm-Message-State: APjAAAUqhcaS8I9ECOlalA4RoZziTDZyokTMdmpEkHMlDZ0CJhoN6P2s zpomfHejbgq4M98aVIJlQi8Lwdte X-Google-Smtp-Source: APXvYqxWdU7vwCZTpqi4gKdDzclKCvarcZjw+RngLyJixn/yMXyttLyD/cnOJSl42MwV+53qWKeIIw== X-Received: by 2002:a17:90a:24ab:: with SMTP id i40mr8320800pje.121.1571794515106; Tue, 22 Oct 2019 18:35:15 -0700 (PDT) Received: from [192.168.31.113] ([43.224.157.60]) by smtp.gmail.com with ESMTPSA id q2sm29867893pfg.144.2019.10.22.18.35.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 22 Oct 2019 18:35:14 -0700 (PDT) To: yhs@fb.com, ast@kernel.org, daniel@iogearbox.net, netdev@vger.kernel.org, linux-kselftest@vger.kernel.org From: Prabhakar Kushwaha Subject: Linux-5.4: bpf: test_core_reloc_arrays.o: Segmentation fault with llc -march=bpf Message-ID: <8080a9a2-82f1-20b5-8d5d-778536f91780@gmail.com> Date: Wed, 23 Oct 2019 07:05:05 +0530 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.1.2 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Adding other mailing list, folks... Hi All, I am trying to build kselftest on Linux-5.4 on ubuntu 18.04. I installed LLVM-9.0.0 and Clang-9.0.0 from below links after following steps from [1] because of discussion [2] https://releases.llvm.org/9.0.0/llvm-9.0.0.src.tar.xz https://releases.llvm.org/9.0.0/clang-tools-extra-9.0.0.src.tar.xz https://releases.llvm.org/9.0.0/cfe-9.0.0.src.tar.xz Now, i am trying with llc -march=bpf, with this segmentation fault is coming as below: gcc -g -Wall -O2 -I../../../include/uapi -I../../../lib -I../../../lib/bpf -I../../../../include/generated -DHAVE_GENHDR -I../../../include -Dbpf_prog_load=bpf_prog_test_load -Dbpf_load_program=bpf_test_load_program test_flow_dissector.c /usr/src/tovards/linux/tools/testing/selftests/bpf/test_stub.o /usr/src/tovards/linux/tools/testing/selftests/bpf/libbpf.a -lcap -lelf -lrt -lpthread -o /usr/src/tovards/linux/tools/testing/selftests/bpf/test_flow_dissector gcc -g -Wall -O2 -I../../../include/uapi -I../../../lib -I../../../lib/bpf -I../../../../include/generated -DHAVE_GENHDR -I../../../include -Dbpf_prog_load=bpf_prog_test_load -Dbpf_load_program=bpf_test_load_program test_tcp_check_syncookie_user.c /usr/src/tovards/linux/tools/testing/selftests/bpf/test_stub.o /usr/src/tovards/linux/tools/testing/selftests/bpf/libbpf.a -lcap -lelf -lrt -lpthread -o /usr/src/tovards/linux/tools/testing/selftests/bpf/test_tcp_check_syncookie_user gcc -g -Wall -O2 -I../../../include/uapi -I../../../lib -I../../../lib/bpf -I../../../../include/generated -DHAVE_GENHDR -I../../../include -Dbpf_prog_load=bpf_prog_test_load -Dbpf_load_program=bpf_test_load_program test_lirc_mode2_user.c /usr/src/tovards/linux/tools/testing/selftests/bpf/test_stub.o /usr/src/tovards/linux/tools/testing/selftests/bpf/libbpf.a -lcap -lelf -lrt -lpthread -o /usr/src/tovards/linux/tools/testing/selftests/bpf/test_lirc_mode2_user (clang -I. -I./include/uapi -I../../../include/uapi -I/usr/src/tovards/linux/tools/testing/selftests/bpf/../usr/include -D__TARGET_ARCH_arm64 -g -idirafter /usr/local/include -idirafter /usr/local/lib/clang/9.0.0/include -idirafter /usr/include/aarch64-linux-gnu -idirafter /usr/include -Wno-compare-distinct-pointer-types -O2 -target bpf -emit-llvm \ -c progs/test_core_reloc_arrays.c -o - || echo "clang failed") | \ llc -march=bpf -mcpu=probe -filetype=obj -o /usr/src/tovards/linux/tools/testing/selftests/bpf/test_core_reloc_arrays.o Stack dump: 0. Program arguments: llc -march=bpf -mcpu=probe -filetype=obj -o /usr/src/tovards/linux/tools/testing/selftests/bpf/test_core_reloc_arrays.o 1. Running pass 'Function Pass Manager' on module ''. 2. Running pass 'BPF Assembly Printer' on function '@test_core_arrays' #0 0x0000aaaac618db08 llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/usr/local/bin/llc+0x152eb08) Segmentation fault Makefile:260: recipe for target '/usr/src/tovards/linux/tools/testing/selftests/bpf/test_core_reloc_arrays.o' failed make[1]: *** [/usr/src/tovards/linux/tools/testing/selftests/bpf/test_core_reloc_arrays.o] Error 139 To add more details, Commenting following lines in bpf/progs/test_core_reloc_arrays.c removes the segmentation fault. --- a/tools/testing/selftests/bpf/progs/test_core_reloc_arrays.c +++ b/tools/testing/selftests/bpf/progs/test_core_reloc_arrays.c @@ -41,15 +41,14 @@ int test_core_arrays(void *ctx) if (BPF_CORE_READ(&out->a2, &in->a[2])) return 1; /* in->b[1][2][3] */ - if (BPF_CORE_READ(&out->b123, &in->b[1][2][3])) - return 1; +// if (BPF_CORE_READ(&out->b123, &in->b[1][2][3])) +// return 1; /* in->c[1].c */ if (BPF_CORE_READ(&out->c1c, &in->c[1].c)) return 1; /* in->d[0][0].d */ - if (BPF_CORE_READ(&out->d00d, &in->d[0][0].d)) - return 1; - +// if (BPF_CORE_READ(&out->d00d, &in->d[0][0].d)) +// return 1; return 0; } It looks to be something related llc and more than 1 dimension array. has anyone faced such error. Please suggest!! --prabhakar(pk) [1] https://stackoverflow.com/questions/47255526/how-to-build-the-latest-clang-tidy [2] https://www.mail-archive.com/netdev@vger.kernel.org/msg315096.html Linux top-commit ---------------- commit bc88f85c6c09306bd21917e1ae28205e9cd775a7 (HEAD -> master, origin/master, origin/HEAD) Author: Ben Dooks Date: Wed Oct 16 12:24:58 2019 +0100 kthread: make __kthread_queue_delayed_work static The __kthread_queue_delayed_work is not exported so make it static, to avoid the following sparse warning: kernel/kthread.c:869:6: warning: symbol '__kthread_queue_delayed_work' was not declared. Should it be static? Signed-off-by: Ben Dooks Signed-off-by: Linus Torvalds