From patchwork Wed May 10 05:38:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Gow X-Patchwork-Id: 681510 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 60F98C77B7C for ; Wed, 10 May 2023 05:38:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235925AbjEJFiu (ORCPT ); Wed, 10 May 2023 01:38:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235798AbjEJFiq (ORCPT ); Wed, 10 May 2023 01:38:46 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9BD40273E for ; Tue, 9 May 2023 22:38:43 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id 3f1490d57ef6-b9a7c58ec19so8255499276.2 for ; Tue, 09 May 2023 22:38:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1683697123; x=1686289123; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=D21RSkoXuPIazsZogkwKEp2pOsmA6u55RxvLm4Pqyu0=; b=lPjEr4Y91YjA1DNPtgQa83pK7PbcyEl0pyuhZLNr+D/cRXObIpRBPlUEnuSxJD0dat cc9uF5IP+1FSE0JWzIbCDVH5NaX+zg1uIVxcUJ/OmfnkEBJ9ysUbl6tbjvwDi7BY/1HH le11hW04bhEyKovFflUg+lE3nLrPr4onNp7uVYyuvjtqtsZEICQ4i1FAk+Mv2wh5EAqo TxHhUuRFI/GRs+iIpWx/0jB5sbtHiiCZjO1575V3AN+lIxzVgz4qBoFa3qGGH+K9CrXq 1TQp+VfVULgwLO4EPsVnPAasLSHyQ8EcYiA8UTj/qM8M3bV+4xCuc0CeWygjj9EyT/UT Cmrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683697123; x=1686289123; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=D21RSkoXuPIazsZogkwKEp2pOsmA6u55RxvLm4Pqyu0=; b=BthHHOafhOxY/hnsSNMIQJlDY62ZdPfmYlGo3RLbFWkYcd7n1iIpi4i1OKGeh30Qin qKKauSERauqdMJQZrSTvadEYfyY8Th3kxUTWRbc1ppNmxZt6LnIRNOWiQj9Ga1vmeurf 6Ca2FQLaFm87rB1YxX+pLwR5Fq+7zOstwfHWene9zXBXHIDOnK/ZwALhtvMWjZOcx4tj omb8p5iyuubWm/uXnoMIXqdKkZAjmQe5kGH2AQiKSciiJRkS6G/hRDSgICpJCUsR12SU k0Cf0I+qamkfEXtBIJv9p0U1iG4NoRSDePBT9Qewx7QTLITuSTPbun6cGer5rNcAzwDW V2uA== X-Gm-Message-State: AC+VfDwh040OFlTW80JVclHraOAoLtX1kRFTNvWC+gQ883KMEhuJ6lKG bH9KkXXpAb4/cyGiL4YmU8BMjCI7ETDscA== X-Google-Smtp-Source: ACHHUZ5prhcsa2uKfRyYa70NkTmue+tLexFwGpYvoi5fvKb9TeMGfaJMHMNK6fm4cHpohQ01ySzPxykDD0BHfg== X-Received: from slicestar.c.googlers.com ([fda3:e722:ac3:cc00:4f:4b78:c0a8:20a1]) (user=davidgow job=sendgmr) by 2002:a25:d6d0:0:b0:b8f:35c1:e63e with SMTP id n199-20020a25d6d0000000b00b8f35c1e63emr10524538ybg.6.1683697122908; Tue, 09 May 2023 22:38:42 -0700 (PDT) Date: Wed, 10 May 2023 13:38:30 +0800 In-Reply-To: <20230510053832.438529-1-davidgow@google.com> Mime-Version: 1.0 References: <20230510053832.438529-1-davidgow@google.com> X-Mailer: git-send-email 2.40.1.521.gf1e218fcd8-goog Message-ID: <20230510053832.438529-2-davidgow@google.com> Subject: [PATCH v4 2/4] Documentation: kunit: Note that assertions should not be used in cleanup From: David Gow To: Benjamin Berg , Brendan Higgins , Shuah Khan , Rae Moar , Daniel Latypov Cc: David Gow , maxime@cerno.tech, Stephen Boyd , kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Sadiya Kazi Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org As assertions abort the test cleanup process, they should be avoided from within a suite's exit function, or from within resource 'free' functions. Unlike with initialisation or main test execution, no further cleanup will be performed after a failed assertion, potentially causing a leak of resources. Reviewed-by: Sadiya Kazi Signed-off-by: David Gow --- Changes since v3: https://lore.kernel.org/linux-kselftest/20230421040218.2156548-2-davidgow@google.com/ - Add Sadiya's Reviewed-by tag. No changes since v2: https://lore.kernel.org/linux-kselftest/20230419085426.1671703-2-davidgow@google.com/ This patch was introduced in v2. --- Documentation/dev-tools/kunit/usage.rst | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/dev-tools/kunit/usage.rst b/Documentation/dev-tools/kunit/usage.rst index 9faf2b4153fc..9f720f1317d3 100644 --- a/Documentation/dev-tools/kunit/usage.rst +++ b/Documentation/dev-tools/kunit/usage.rst @@ -121,6 +121,12 @@ there's an allocation error. ``return`` so they only work from the test function. In KUnit, we stop the current kthread on failure, so you can call them from anywhere. +.. note:: + Warning: There is an exception to the above rule. You shouldn't use assertions + in the suite's exit() function, or in the free function for a resource. These + run when a test is shutting down, and an assertion here prevents further + cleanup code from running, potentially leading to a memory leak. + Customizing error messages --------------------------