From nobody Mon Feb 9 05:58:37 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4A158C7EE23 for ; Mon, 5 Jun 2023 20:28:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232410AbjFEU2i (ORCPT ); Mon, 5 Jun 2023 16:28:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51988 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233048AbjFEU23 (ORCPT ); Mon, 5 Jun 2023 16:28:29 -0400 Received: from mail-pf1-x44a.google.com (mail-pf1-x44a.google.com [IPv6:2607:f8b0:4864:20::44a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8512F127 for ; Mon, 5 Jun 2023 13:28:23 -0700 (PDT) Received: by mail-pf1-x44a.google.com with SMTP id d2e1a72fcca58-65026629c1eso1892517b3a.0 for ; Mon, 05 Jun 2023 13:28:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1685996903; x=1688588903; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=+qYHV5dndHRBhvbPRu9xCOpU+u+ZVanAjGEzSYR7+fE=; b=cRXKNn7+YSXxjSE82ZAWPBlWtgcRZW0a6eCJLqKXO+z9nfKhe3fAvCtkNzc9R20ATJ JTA8H8IoLKqChxw3bQIxPIsF+Yjm3YXEPvRajAl8/RU9TmDS4CfjlKJwFpCkG0rDxwQq 4/2ZMmjUPim1BnCP0ZNfireRVukam04u9nXCM5u37eAtzr7gJBweyJsxhTQdxYWgQdks +cxVYRhaeVTQsXxPcznKJAHgraHO+FWFEVPI9QtV89IyO/76AWyNolwh2tDTs2C6SAgH KeEswJtIUw8Gd5rz2rvzs/xIAh/nXeYvOCElFv4R9sFqZJVG6IDtUH4L0wNU/LSSnJlF lpNQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685996903; x=1688588903; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=+qYHV5dndHRBhvbPRu9xCOpU+u+ZVanAjGEzSYR7+fE=; b=RIkFZ1+J2Q+uv2wpZBmsf+ax+SJrSDz4rEj6FFGyGwH9etViycaogjUiGJKyifihLv HndXK1q5u5eQhJoRh2Mne1ldjsWbXNuhSz96sws4NlgGx/OipZzDr3/LeQzkltEPO6NN vvulKd1xmj68rThphg73YUFY+zQUAoLXQlyYDOdjG55+9unxoIvhS04SAn9aewFPjOwP PRsr2nmnNaPPXjoZ8FsAIeYnLqjTc2m93lWALfSzAqIATP6LGj7Pwk3W1q3SQLiLrh2/ 5t92WYvXI5gYUHyxUSMVgykFP9XYNpwS7bdJCEai0BpUmdz4Nz7skOOi8lH2jcKLiCoF NyDA== X-Gm-Message-State: AC+VfDwFmka+LNdSLhSNok3gwK0rnb0Bh1MPlQgP9PfYYsJwv1S0R8OC dtUGFC+dEGx8hwTzAr/ZDQjeih/TJPPZ X-Google-Smtp-Source: ACHHUZ5kJFyJQnGfJxkrSLArQVibKLxmKB7BQc3RM1y2mYm7yqoiImIn/6Lx1E+t5ldnpaKwEkpEIhyFaBI5 X-Received: from irogers.svl.corp.google.com ([2620:15c:2d4:203:bed9:39b9:3df1:2828]) (user=irogers job=sendgmr) by 2002:a05:6a00:2292:b0:658:747:c85e with SMTP id f18-20020a056a00229200b006580747c85emr331558pfe.6.1685996902955; Mon, 05 Jun 2023 13:28:22 -0700 (PDT) Date: Mon, 5 Jun 2023 13:27:12 -0700 In-Reply-To: <20230605202712.1690876-1-irogers@google.com> Message-Id: <20230605202712.1690876-5-irogers@google.com> Mime-Version: 1.0 References: <20230605202712.1690876-1-irogers@google.com> X-Mailer: git-send-email 2.41.0.rc0.172.g3f132b7071-goog Subject: [PATCH v2 4/4] perf build: Filter out BTF sources without a .BTF section From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Ian Rogers , Adrian Hunter , James Clark , Tiezhu Yang , Yang Jihong , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" If generating vmlinux.h, make the code to generate it more tolerant by filtering out paths to kernels that lack a .BTF section. Signed-off-by: Ian Rogers --- tools/perf/Makefile.perf | 23 ++++++++++++++++++++--- 1 file changed, 20 insertions(+), 3 deletions(-) diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index f1840af195c0..c3bb27a912b0 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -193,6 +193,7 @@ FLEX ?=3D flex BISON ?=3D bison STRIP =3D strip AWK =3D awk +READELF ?=3D readelf =20 # include Makefile.config by default and rule out # non-config cases @@ -1080,12 +1081,28 @@ $(BPFTOOL): | $(SKEL_TMP_OUT) $(Q)CFLAGS=3D $(MAKE) -C ../bpf/bpftool \ OUTPUT=3D$(SKEL_TMP_OUT)/ bootstrap =20 -VMLINUX_BTF_PATHS ?=3D $(if $(O),$(O)/vmlinux) \ +# Paths to search for a kernel to generate vmlinux.h from. +VMLINUX_BTF_ELF_PATHS ?=3D $(if $(O),$(O)/vmlinux) \ $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ ../../vmlinux \ - /sys/kernel/btf/vmlinux \ /boot/vmlinux-$(shell uname -r) -VMLINUX_BTF ?=3D $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) + +# Paths to BTF information. +VMLINUX_BTF_BTF_PATHS ?=3D /sys/kernel/btf/vmlinux + +# Filter out kernels that don't exist or without a BTF section. +VMLINUX_BTF_ELF_ABSPATHS ?=3D $(abspath $(wildcard $(VMLINUX_BTF_ELF_PATHS= ))) +VMLINUX_BTF_PATHS ?=3D $(shell for file in $(VMLINUX_BTF_ELF_ABSPATHS); \ + do \ + if [ -f $$file ] && ($(READELF) -t "$$file" | grep .BTF); \ + then \ + echo "$$file"; \ + fi; \ + done) \ + $(wildcard $(VMLINUX_BTF_BTF_PATHS)) + +# Select the first as the source of vmlinux.h. +VMLINUX_BTF ?=3D $(firstword $(VMLINUX_BTF_PATHS)) =20 $(SKEL_OUT)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) ifeq ($(VMLINUX_H),) --=20 2.41.0.rc0.172.g3f132b7071-goog