From nobody Thu Sep 11 19:28:43 2025 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 AFFEDC0015E for ; Mon, 7 Aug 2023 02:56:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229970AbjHGC4j (ORCPT ); Sun, 6 Aug 2023 22:56:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49116 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229976AbjHGC40 (ORCPT ); Sun, 6 Aug 2023 22:56:26 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2365B1733; Sun, 6 Aug 2023 19:55:57 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9A1526133A; Mon, 7 Aug 2023 02:55:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 05FE5C433C7; Mon, 7 Aug 2023 02:55:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1691376953; bh=rmxZE83d3FXHRV2guA/jsebhw3LfN+eEvFVGseZCh3Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WnYTCRr1Lss7WR/d5AJQW78eAGilsSVBOaKHG+hpnKM2wB7vUxBgcYYolWgAkJc2I lqE6mV9rwSCLhZVsmgJNIBcySKQ+dbaHFw/kLhdGvySDg2gOwfXwV6bFWak9ONysmt SSti2LMCUdHSdL6H605JndN4N6BneEQuaboVNr5OiSTQW4fAmFY+WOMcVNUniriw+Z 9d8dFQob/b5SuMH7nHB2Oryp7xSsoLjrkePhQhjYFQQtrBHBCnPoYnEIJaW70JFmDh IbSL9rolpHsyXCwWEzKzuZOfHJ/2oR6kZoI7rEQYN9JX0BCqog+DemIUY1n0v8DfM7 xnWLZQhyvw2PA== From: "Masami Hiramatsu (Google)" To: linux-trace-kernel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Steven Rostedt , mhiramat@kernel.org, Martin KaFai Lau , bpf@vger.kernel.org, Sven Schnelle , Alexei Starovoitov Subject: [PATCH v5 8/9] selftests/ftrace: Add BTF fields access testcases Date: Mon, 7 Aug 2023 11:55:48 +0900 Message-Id: <169137694835.271367.10787741563925762942.stgit@devnote2> X-Mailer: git-send-email 2.34.1 In-Reply-To: <169137686814.271367.11218568219311636206.stgit@devnote2> References: <169137686814.271367.11218568219311636206.stgit@devnote2> User-Agent: StGit/0.19 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Masami Hiramatsu (Google) Add test cases for accessing the data structure fields using BTF info. This includes the field access from parameters and retval, and accessing string information. Signed-off-by: Masami Hiramatsu (Google) Reviewed-by: Alan Maguire --- Changes in v2: - Use '$retval' instead of 'retval'. - Add a test that use both '$retval' and '$arg1' for fprobe. Changes in v3: - Change a test case with a numeric value. - Add a test case with mixed '.' and '->' operators. Changes in v5: - Check fields access availability. --- .../ftrace/test.d/dynevent/add_remove_btfarg.tc | 20 ++++++++++++++++= ++++ .../ftrace/test.d/dynevent/fprobe_syntax_errors.tc | 8 ++++++++ 2 files changed, 28 insertions(+) diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfa= rg.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc index f34b14ef9781..b9c21a81d248 100644 --- a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc +++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc @@ -5,6 +5,7 @@ =20 KPROBES=3D FPROBES=3D +FIELDS=3D =20 if grep -qF "p[:[/][]] []" README ; then KPROBES=3Dyes @@ -12,6 +13,9 @@ fi if grep -qF "f[:[/][]] [%return] []" README= ; then FPROBES=3Dyes fi +if grep -qF "[->field[->field|.field...]]" README ; then + FIELDS=3Dyes +fi =20 if [ -z "$KPROBES" -a -z "$FPROBES" ] ; then exit_unsupported @@ -21,6 +25,9 @@ echo 0 > events/enable echo > dynamic_events =20 TP=3Dkfree +TP2=3Dkmem_cache_alloc +TP3=3Dgetname_flags +TP4=3Dsched_wakeup =20 if [ "$FPROBES" ] ; then echo "f:fpevent $TP object" >> dynamic_events @@ -33,6 +40,7 @@ echo > dynamic_events =20 echo "f:fpevent $TP "'$arg1' >> dynamic_events grep -q "fpevent.*object=3Dobject" dynamic_events + echo > dynamic_events =20 echo "f:fpevent $TP "'$arg*' >> dynamic_events @@ -45,6 +53,18 @@ fi =20 echo > dynamic_events =20 +if [ "$FIELDS" ] ; then +echo "t:tpevent ${TP2} obj_size=3Ds->object_size" >> dynamic_events +echo "f:fpevent ${TP3}%return path=3D\$retval->name:string" >> dynamic_eve= nts +echo "t:tpevent2 ${TP4} p->se.group_node.next->prev" >> dynamic_events + +grep -q "tpevent .*obj_size=3Ds->object_size" dynamic_events +grep -q "fpevent.*path=3D\$retval->name:string" dynamic_events +grep -q 'tpevent2 .*p->se.group_node.next->prev' dynamic_events + +echo > dynamic_events +fi + if [ "$KPROBES" ] ; then echo "p:kpevent $TP object" >> dynamic_events grep -q "kpevent.*object=3Dobject" dynamic_events diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_e= rrors.tc b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_err= ors.tc index 72563b2e0812..20e42c030095 100644 --- a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc +++ b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc @@ -103,6 +103,14 @@ check_error 'f vfs_read%return ^$arg*' # NOFENTRY_ARGS check_error 'f vfs_read ^hoge' # NO_BTFARG check_error 'f kfree ^$arg10' # NO_BTFARG (exceed the number of paramete= rs) check_error 'f kfree%return ^$retval' # NO_RETVAL + +if grep -qF "[->field[->field|.field...]]" README ; then +check_error 'f vfs_read%return $retval->^foo' # NO_PTR_STRCT +check_error 'f vfs_read file->^foo' # NO_BTF_FIELD +check_error 'f vfs_read file^-.foo' # BAD_HYPHEN +check_error 'f vfs_read ^file:string' # BAD_TYPE4STR +fi + else check_error 'f vfs_read ^$arg*' # NOSUP_BTFARG check_error 't kfree ^$arg*' # NOSUP_BTFARG