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=-2.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 0A840C433ED for ; Mon, 12 Apr 2021 04:48:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D41816120B for ; Mon, 12 Apr 2021 04:47:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229666AbhDLEsP (ORCPT ); Mon, 12 Apr 2021 00:48:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39842 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230208AbhDLEsL (ORCPT ); Mon, 12 Apr 2021 00:48:11 -0400 Received: from mail-il1-x129.google.com (mail-il1-x129.google.com [IPv6:2607:f8b0:4864:20::129]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E079DC06138D for ; Sun, 11 Apr 2021 21:47:53 -0700 (PDT) Received: by mail-il1-x129.google.com with SMTP id i22so5202101ila.11 for ; Sun, 11 Apr 2021 21:47:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:reply-to:from:date:message-id :subject:to:cc; bh=DOfJyQBfc5o+WHTNRfhhNX3Hma18tSVcM7b4i5K5Lng=; b=F7A/QiTqTS4tChu7OmgCi+mM8F8XYqAVtgyOFcI1qRnwdU09MsaYbJFAhl3tjpZqUU Q5lw31qwSJXh45+64zhnO0FSxtIkJAAVoKVJXCvW8RckFUkqYkzwwPaodeN6CC91Rpv6 3oVdllwClmiGdPRfDZUzQDQFO28tKmZly83AwVDNcR2RUunl8sP+D1eeVAYczNlM1Xac alhuCxz8QjffpyeAFbbeqXPHcOjT4cFC0mUa1iE2R22iAXa7B3z8oWm2Icas1H26Kmfb XTim+L4AEWInH0eI8m5zkRbQCeS82qwZ6D66KiLnsP7Y6wFbcl2xun+fuU6b3yUt0eKa CeJg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:reply-to :from:date:message-id:subject:to:cc; bh=DOfJyQBfc5o+WHTNRfhhNX3Hma18tSVcM7b4i5K5Lng=; b=RO/WaCfiAtJhrlIYKj9CtccuHoN3PBQcOe89G3nU+245Mo+AkWtQTP9T0DdLHmCH5U VYeVkEScB7noB6QhPdbI2RLgn9lg6AjsMYEctEDMZJlJYWPqN8c6hoz8z/QrnvV3QTOI wOR+j0IyV6a2y0EZ+FYlgf37vFvGzacTlcnWs1UqNlzGj4Xorcj+fn1zLEiNlZgRelZE BPOxouKzz0F+yq0BouK5EwcNIo3Ys4cAX5BFmd6LGzoYpXf7x1kWO3PsdA71UL+XwFY/ wDTph7KKB0+6v/6fF3Ka7/b596MSkRxdEIsL7KnwFPfgUsVXGm7RbkeTdbDiJY1pj5j6 t1jw== X-Gm-Message-State: AOAM532WvGU5HyMaAzybZHT7YRLZJyFSfIgTc3TnqVdTtgIBk+BUX7jp bmSQtVUkr0PTvv5+6lI/VeJyNPXycs+IxTk5P7w= X-Google-Smtp-Source: ABdhPJwimgXlI5K9OzRxGPlmycQrGQPmYDwRbq6iKazE+z/44Dw+ty5x82qdxdHSN5a2uJn3M/dlUd0rfO/+Ry7y2Bg= X-Received: by 2002:a92:dc44:: with SMTP id x4mr2030670ilq.209.1618202873266; Sun, 11 Apr 2021 21:47:53 -0700 (PDT) MIME-Version: 1.0 References: <20210410164925.768741-1-yhs@fb.com> <20210410164940.770304-1-yhs@fb.com> <7c82c0f5-2a96-7a5c-b090-f26c9351786c@fb.com> <3f224f2c-bb7e-accc-b095-7fee8210861b@fb.com> In-Reply-To: <3f224f2c-bb7e-accc-b095-7fee8210861b@fb.com> Reply-To: sedat.dilek@gmail.com From: Sedat Dilek Date: Mon, 12 Apr 2021 06:47:19 +0200 Message-ID: Subject: Re: [PATCH bpf-next 3/5] selftests/bpf: fix test_cpp compilation failure with clang To: Yonghong Song Cc: bpf@vger.kernel.org, Andrii Nakryiko , Arnaldo Carvalho de Melo , kernel-team@fb.com, Nick Desaulniers Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On Sun, Apr 11, 2021 at 9:08 PM Yonghong Song wrote: [ ... ] > > BTW, did you check (llvm-)objdump output? > > > > $ /opt/llvm-toolchain/bin/llvm-objdump-12 -Dr test_cpp | grep core_extern > > This is what I got with g++ compiled test_cpp: > > $ llvm-objdump -Dr test_cpp | grep core_extern > 406a80: e8 5b 01 00 00 callq 0x406be0 > <_ZL25test_core_extern__destroyP16test_core_extern> > 406ab9: e8 22 01 00 00 callq 0x406be0 > <_ZL25test_core_extern__destroyP16test_core_extern> > 0000000000406be0 <_ZL25test_core_extern__destroyP16test_core_extern>: > 406be3: 74 1a je 0x406bff > <_ZL25test_core_extern__destroyP16test_core_extern+0x1f> > 406bef: 74 05 je 0x406bf6 > <_ZL25test_core_extern__destroyP16test_core_extern+0x16> > What is the output when compiling with clang++ in your bpf-next environment? - Sedat -