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=-5.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 9CEEEC433DB for ; Mon, 18 Jan 2021 13:43:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 458E722B47 for ; Mon, 18 Jan 2021 13:43:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404740AbhARNnA (ORCPT ); Mon, 18 Jan 2021 08:43:00 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:49017 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404728AbhARNmq (ORCPT ); Mon, 18 Jan 2021 08:42:46 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1610977279; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=7TPBEwVnqJ79ZnolUqmuqdhs8Wq75X7BO1WvPH5WhcQ=; b=Af6x/HxSa+9uEM65BhJxv2kjx/+zQoGMA9f6sXjifINXXYCyQapn7JTbfoXLDenGAAd3Jn sYQwpEln4f7eq5o5+V/mi86f74KEL8/TohQw9xhH3Q3e1kj+p0DnSqGBbVdf/2T7vmd+Ro vijMPKil7IZsru12OhgVRsuNGOuR080= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-561-cBW4OtNvOVWHQ4nu8cNU6Q-1; Mon, 18 Jan 2021 08:41:15 -0500 X-MC-Unique: cBW4OtNvOVWHQ4nu8cNU6Q-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id F3564190A7BC; Mon, 18 Jan 2021 13:41:13 +0000 (UTC) Received: from carbon (unknown [10.36.110.4]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0F2836267E; Mon, 18 Jan 2021 13:41:02 +0000 (UTC) Date: Mon, 18 Jan 2021 14:41:01 +0100 From: Jesper Dangaard Brouer To: Brendan Jackman , =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= Cc: brouer@redhat.com, BPF-dev-list , Alexei Starovoitov , Daniel Borkmann , Veronika Kabatova , Yauheni Kaliuta , Stanislav Kozina Subject: Issues compiling selftests XADD - "Invalid usage of the XADD return value" Message-ID: <20210118144101.01a5d410@carbon> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Hi All, After rebasing (my MTU patchset) to bpf-next (232164e041e925a) I'm getting this error when compiling selftests (full error below signature): "CLNG-BPF [test_maps] atomics.o" "fatal error: error in backend: line 27: Invalid usage of the XADD return value" "PLEASE submit a bug report to https://bugs.llvm.org/ [...]" It looked like a LLVM bug, so I compiled llvm-11.1.0-rc1, but it still fails. I noticed Brendan Jackman changes... could this be related? - - Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer dirs ~/git/kernel/bpf-next/tools/testing/selftests/bpf CLNG-BPF [test_maps] atomics.o fatal error: error in backend: line 27: Invalid usage of the XADD return value PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script. Stack dump: 0. Program arguments: /usr/local/bin/clang -g -mlittle-endian -Wno-compare-distinct-pointer-types -O2 -target bpf -mcpu=v3 -fcolor-diagnostics -D__TARGET_ARCH_x86 -I/home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf/tools/include -I/home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf -I/home/jbrouer/git/kernel/bpf-next/tools/include/uapi -I/home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/usr/include -idirafter /usr/local/include -idirafter /usr/local/stow/llvm-11.1.0-rc1-git-9bbcb554cdbf/lib/clang/11.1.0/include -idirafter /usr/include -DENABLE_ATOMICS_TESTS -c -o /home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf/atomics.o progs/atomics.c 1. parser at end of file 2. Code generation 3. Running pass 'Function Pass Manager' on module 'progs/atomics.c'. 4. Running pass 'BPF PreEmit Checking' on function '@add' #0 0x0000000001969e8a llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/usr/local/bin/clang+0x1969e8a) #1 0x0000000001967f84 llvm::sys::RunSignalHandlers() (/usr/local/bin/clang+0x1967f84) #2 0x0000000001968478 llvm::sys::CleanupOnSignal(unsigned long) (/usr/local/bin/clang+0x1968478) #3 0x00000000018f2b34 llvm::CrashRecoveryContext::HandleExit(int) (/usr/local/bin/clang+0x18f2b34) #4 0x0000000001961ea7 llvm::sys::Process::Exit(int) (/usr/local/bin/clang+0x1961ea7) #5 0x000000000095ca03 LLVMErrorHandler(void*, std::__cxx11::basic_string, std::allocator > const&, bool) (/usr/local/bin/clang+0x95ca03) #6 0x00000000018f7ca5 llvm::report_fatal_error(llvm::Twine const&, bool) (/usr/local/bin/clang+0x18f7ca5) #7 0x00000000018f7dfe (/usr/local/bin/clang+0x18f7dfe) #8 0x000000000096d5d1 (anonymous namespace)::BPFMIPreEmitChecking::runOnMachineFunction(llvm::MachineFunction&) (/usr/local/bin/clang+0x96d5d1) #9 0x0000000000f68484 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/usr/local/bin/clang+0xf68484) #10 0x0000000001348a68 llvm::FPPassManager::runOnFunction(llvm::Function&) (/usr/local/bin/clang+0x1348a68) #11 0x00000000013490e3 llvm::FPPassManager::runOnModule(llvm::Module&) (/usr/local/bin/clang+0x13490e3) #12 0x0000000001347dc3 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/usr/local/bin/clang+0x1347dc3) #13 0x0000000001bd2514 (anonymous namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction, std::unique_ptr >) (/usr/local/bin/clang+0x1bd2514) #14 0x0000000001bd32d1 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout const&, llvm::Module*, clang::BackendAction, std::unique_ptr >) (/usr/local/bin/clang+0x1bd32d1) #15 0x00000000027798ce clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/usr/local/bin/clang+0x27798ce) #16 0x00000000032c7449 clang::ParseAST(clang::Sema&, bool, bool) (/usr/local/bin/clang+0x32c7449) #17 0x0000000002176081 clang::FrontendAction::Execute() (/usr/local/bin/clang+0x2176081) #18 0x000000000212e21b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/usr/local/bin/clang+0x212e21b) #19 0x00000000022307a0 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/local/bin/clang+0x22307a0) #20 0x000000000095d153 cc1_main(llvm::ArrayRef, char const*, void*) (/usr/local/bin/clang+0x95d153) #21 0x000000000095b03b ExecuteCC1Tool(llvm::SmallVectorImpl&) (/usr/local/bin/clang+0x95b03b) #22 0x0000000002011215 void llvm::function_ref::callback_fn >, std::__cxx11::basic_string, std::allocator >*, bool*) const::'lambda'()>(long) (/usr/local/bin/clang+0x2011215) #23 0x00000000018f29c3 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref) (/usr/local/bin/clang+0x18f29c3) #24 0x0000000002011c71 clang::driver::CC1Command::Execute(llvm::ArrayRef >, std::__cxx11::basic_string, std::allocator >*, bool*) const (.part.0) (/usr/local/bin/clang+0x2011c71) #25 0x0000000001fe9d21 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&) const (/usr/local/bin/clang+0x1fe9d21) #26 0x0000000001fea54d clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl >&) const (/usr/local/bin/clang+0x1fea54d) #27 0x0000000001ff571f clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl >&) (/usr/local/bin/clang+0x1ff571f) #28 0x00000000008ee422 main (/usr/local/bin/clang+0x8ee422) #29 0x00007f2417f0b1a3 __libc_start_main (/lib64/libc.so.6+0x271a3) #30 0x000000000095abee _start (/usr/local/bin/clang+0x95abee) make: *** [Makefile:417: /home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf/atomics.o] Error 1