[{"id":28550,"web_url":"https://patchwork.libcamera.org/comment/28550/","msgid":"<871qa9897h.fsf@redhat.com>","date":"2024-01-22T19:22:10","subject":"Re: [PATCH 03/12] test: object-delete: Test deferred delete just\n\tbefore thread stops","submitter":{"id":177,"url":"https://patchwork.libcamera.org/api/people/177/","name":"Milan Zamazal","email":"mzamazal@redhat.com"},"content":"Laurent Pinchart writes:\n\n> The Object::deleterLater() function is expected to not race with\n ^^^\ndeleteLater\n\n> stopping the thread the object is bound to. Add a test for this.\n>\n> The test currently fails, demonstrating a bug in libcamera.\n\nShouldn't it then be marked as an expected failure?\n\n> Signed-off-by: Laurent Pinchart \n> ---\n> test/object-delete.cpp | 30 +++++++++++++++++++++++++-----\n> 1 file changed, 25 insertions(+), 5 deletions(-)\n>\n> diff --git a/test/object-delete.cpp b/test/object-delete.cpp\n> index eabefe935974..80b7dc41cd37 100644\n> --- a/test/object-delete.cpp\n> +++ b/test/object-delete.cpp\n> @@ -33,10 +33,10 @@ public:\n> \tunsigned int *deleteCount_;\n> };\n> \n> -class NewThread : public Thread\n> +class DeleterThread : public Thread\n> {\n> public:\n> -\tNewThread(Object *obj)\n> +\tDeleterThread(Object *obj)\n> \t\t: object_(obj)\n> \t{\n> \t}\n> @@ -63,9 +63,9 @@ protected:\n> \t\tunsigned int count = 0;\n> \t\tTestObject *obj = new TestObject(&count);\n> \n> -\t\tNewThread thread(obj);\n> -\t\tthread.start();\n> -\t\tthread.wait();\n> +\t\tDeleterThread delThread(obj);\n> +\t\tdelThread.start();\n> +\t\tdelThread.wait();\n> \n> \t\tThread::current()->dispatchMessages(Message::Type::DeferredDelete);\n> \n> @@ -89,6 +89,26 @@ protected:\n> \t\t\treturn TestFail;\n> \t\t}\n> \n> +\t\t/*\n> +\t\t * Test that deleteLater() works properly when called just\n> +\t\t * before the object's thread exits.\n> +\t\t */\n> +\t\tThread boundThread;\n> +\t\tboundThread.start();\n> +\n> +\t\tcount = 0;\n> +\t\tobj = new TestObject(&count);\n> +\t\tobj->moveToThread(&boundThread);\n> +\n> +\t\tobj->deleteLater();\n> +\t\tboundThread.exit();\n> +\t\tboundThread.wait();\n> +\n> +\t\tif (count != 1) {\n> +\t\t\tcout << \"Object deletion right before thread exit failed (\" << count << \")\" << endl;\n> +\t\t\treturn TestFail;\n> +\t\t}\n> +\n> \t\treturn TestPass;\n> \t}\n> };","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 98C50C323E\n\tfor ;\n\tMon, 22 Jan 2024 19:22:18 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id EEF176291F;\n\tMon, 22 Jan 2024 20:22:17 +0100 (CET)","from us-smtp-delivery-124.mimecast.com\n\t(us-smtp-delivery-124.mimecast.com [170.10.133.124])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id CFD1D61D30\n\tfor ;\n\tMon, 22 Jan 2024 20:22:16 +0100 (CET)","from mail-wr1-f72.google.com (mail-wr1-f72.google.com\n\t[209.85.221.72]) by relay.mimecast.com with ESMTP with STARTTLS\n\t(version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id\n\tus-mta-518-ucGHkSwQOQ2sHIAc4PCqiw-1; Mon, 22 Jan 2024 14:22:14 -0500","by mail-wr1-f72.google.com with SMTP id\n\tffacd0b85a97d-339311159e1so1072733f8f.1\n\tfor ;\n\tMon, 22 Jan 2024 11:22:14 -0800 (PST)","from nuthatch (ip-77-48-47-2.net.vodafone.cz. 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Add a test for this.\n> >\n> > The test currently fails, demonstrating a bug in libcamera.\n> \n> Shouldn't it then be marked as an expected failure?\n\nI don't think so. should_fail in meson indicates that the test\nexecutable returning an error (including terminating due to an uncaught\nsignal, such as SIGSEGV) indicates success. In this case, the test\nshould pass, but a there's bug in libcamera that makes it fail. Once the\nbug gets fixed, the test will then pass.\n\n> > Signed-off-by: Laurent Pinchart \n> > ---\n> > test/object-delete.cpp | 30 +++++++++++++++++++++++++-----\n> > 1 file changed, 25 insertions(+), 5 deletions(-)\n> >\n> > diff --git a/test/object-delete.cpp b/test/object-delete.cpp\n> > index eabefe935974..80b7dc41cd37 100644\n> > --- a/test/object-delete.cpp\n> > +++ b/test/object-delete.cpp\n> > @@ -33,10 +33,10 @@ public:\n> > \tunsigned int *deleteCount_;\n> > };\n> > \n> > -class NewThread : public Thread\n> > +class DeleterThread : public Thread\n> > {\n> > public:\n> > -\tNewThread(Object *obj)\n> > +\tDeleterThread(Object *obj)\n> > \t\t: object_(obj)\n> > \t{\n> > \t}\n> > @@ -63,9 +63,9 @@ protected:\n> > \t\tunsigned int count = 0;\n> > \t\tTestObject *obj = new TestObject(&count);\n> > \n> > -\t\tNewThread thread(obj);\n> > -\t\tthread.start();\n> > -\t\tthread.wait();\n> > +\t\tDeleterThread delThread(obj);\n> > +\t\tdelThread.start();\n> > +\t\tdelThread.wait();\n> > \n> > \t\tThread::current()->dispatchMessages(Message::Type::DeferredDelete);\n> > \n> > @@ -89,6 +89,26 @@ protected:\n> > \t\t\treturn TestFail;\n> > \t\t}\n> > \n> > +\t\t/*\n> > +\t\t * Test that deleteLater() works properly when called just\n> > +\t\t * before the object's thread exits.\n> > +\t\t */\n> > +\t\tThread boundThread;\n> > +\t\tboundThread.start();\n> > +\n> > +\t\tcount = 0;\n> > +\t\tobj = new TestObject(&count);\n> > +\t\tobj->moveToThread(&boundThread);\n> > +\n> > +\t\tobj->deleteLater();\n> > +\t\tboundThread.exit();\n> > +\t\tboundThread.wait();\n> > +\n> > +\t\tif (count != 1) {\n> > +\t\t\tcout << \"Object deletion right before thread exit failed (\" << count << \")\" << endl;\n> > +\t\t\treturn TestFail;\n> > +\t\t}\n> > +\n> > \t\treturn TestPass;\n> > \t}\n> > };","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id ACC56C323E\n\tfor ;\n\tMon, 22 Jan 2024 22:41:06 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 13E21628B7;\n\tMon, 22 Jan 2024 23:41:06 +0100 (CET)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 1112661D30\n\tfor ;\n\tMon, 22 Jan 2024 23:41:04 +0100 (CET)","from pendragon.ideasonboard.com (89-27-53-110.bb.dnainternet.fi\n\t[89.27.53.110])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id B0C6C221;\n\tMon, 22 Jan 2024 23:39:50 +0100 (CET)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"IYjKRcJM\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1705963190;\n\tbh=hgKIDg84vT4YyrKb2+n12X0VSpx3AGDA/VVAOoCwVfo=;\n\th=Date:From:To:Cc:Subject:References:In-Reply-To:From;\n\tb=IYjKRcJMfmckyNy3zW5RJKh2DbgEf8Ul9YZ/sQA2GHKTOaZZTBClqLGxrPTvD4H/C\n\tevynTAk3ku84jyA9k5kQ2Sqj7eP00W7PO4c1X2K9TZcZKW/zdFRABdhIkzwbDRP9vu\n\trRUvAxf3/m+crE6IsCI4B6FjkI8ZAcKsYIIXtqpc=","Date":"Tue, 23 Jan 2024 00:41:07 +0200","From":"Laurent Pinchart ","To":"Milan Zamazal ","Subject":"Re: [PATCH 03/12] test: object-delete: Test deferred delete just\n\tbefore thread stops","Message-ID":"<20240122224107.GB3195@pendragon.ideasonboard.com>","References":"<20240121035948.4226-1-laurent.pinchart@ideasonboard.com>\n\t<20240121035948.4226-4-laurent.pinchart@ideasonboard.com>\n\t<871qa9897h.fsf@redhat.com>","MIME-Version":"1.0","Content-Type":"text/plain; charset=utf-8","Content-Disposition":"inline","In-Reply-To":"<871qa9897h.fsf@redhat.com>","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"libcamera-devel@lists.libcamera.org","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}},{"id":28580,"web_url":"https://patchwork.libcamera.org/comment/28580/","msgid":"<87v87kbcp0.fsf@redhat.com>","date":"2024-01-23T09:50:51","subject":"Re: [PATCH 03/12] test: object-delete: Test deferred delete just\n\tbefore thread stops","submitter":{"id":177,"url":"https://patchwork.libcamera.org/api/people/177/","name":"Milan Zamazal","email":"mzamazal@redhat.com"},"content":"Laurent Pinchart writes:\n\n> On Mon, Jan 22, 2024 at 08:22:10PM +0100, Milan Zamazal wrote:\n>> Laurent Pinchart writes:\n>> \n>\n>> > The Object::deleterLater() function is expected to not race with\n>> ^^^\n>> deleteLater\n>> \n>> > stopping the thread the object is bound to. Add a test for this.\n>> >\n>> > The test currently fails, demonstrating a bug in libcamera.\n>> \n>> Shouldn't it then be marked as an expected failure?\n>\n> I don't think so. should_fail in meson indicates that the test\n> executable returning an error (including terminating due to an uncaught\n> signal, such as SIGSEGV) indicates success. In this case, the test\n> should pass, but a there's bug in libcamera that makes it fail. Once the\n> bug gets fixed, the test will then pass.\n\nMy point was whether it is OK to have a commit with a failing test, whether it\ncan disturb anything. Right, marking it as an expected failure would be wrong,\nbut maybe disabling it's automatic run and enabling it in the fix commit would\nbe a better idea?\n\n>> > Signed-off-by: Laurent Pinchart \n\nAnyway, I don't have anything else to add, so:\n\nReviewed-by: Milan Zamazal \n\n>> > ---\n>> > test/object-delete.cpp | 30 +++++++++++++++++++++++++-----\n>> > 1 file changed, 25 insertions(+), 5 deletions(-)\n>> >\n>> > diff --git a/test/object-delete.cpp b/test/object-delete.cpp\n>> > index eabefe935974..80b7dc41cd37 100644\n>> > --- a/test/object-delete.cpp\n>> > +++ b/test/object-delete.cpp\n>> > @@ -33,10 +33,10 @@ public:\n>> > \tunsigned int *deleteCount_;\n>> > };\n>> > \n>> > -class NewThread : public Thread\n>> > +class DeleterThread : public Thread\n>> > {\n>> > public:\n>> > -\tNewThread(Object *obj)\n>> > +\tDeleterThread(Object *obj)\n>> > \t\t: object_(obj)\n>> > \t{\n>> > \t}\n>> > @@ -63,9 +63,9 @@ protected:\n>> > \t\tunsigned int count = 0;\n>> > \t\tTestObject *obj = new TestObject(&count);\n>> > \n>> > -\t\tNewThread thread(obj);\n>> > -\t\tthread.start();\n>> > -\t\tthread.wait();\n>> > +\t\tDeleterThread delThread(obj);\n>> > +\t\tdelThread.start();\n>> > +\t\tdelThread.wait();\n>> > \n>> > \t\tThread::current()->dispatchMessages(Message::Type::DeferredDelete);\n>> > \n>> > @@ -89,6 +89,26 @@ protected:\n>> > \t\t\treturn TestFail;\n>> > \t\t}\n>> > \n>> > +\t\t/*\n>> > +\t\t * Test that deleteLater() works properly when called just\n>> > +\t\t * before the object's thread exits.\n>> > +\t\t */\n>> > +\t\tThread boundThread;\n>> > +\t\tboundThread.start();\n>> > +\n>> > +\t\tcount = 0;\n>> > +\t\tobj = new TestObject(&count);\n>> > +\t\tobj->moveToThread(&boundThread);\n>> > +\n>> > +\t\tobj->deleteLater();\n>> > +\t\tboundThread.exit();\n>> > +\t\tboundThread.wait();\n>> > +\n>> > +\t\tif (count != 1) {\n>> > +\t\t\tcout << \"Object deletion right before thread exit failed (\" << count << \")\" << endl;\n>> > +\t\t\treturn TestFail;\n>> > +\t\t}\n>> > +\n>> > \t\treturn TestPass;\n>> > \t}\n>> > };","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 87194BDC71\n\tfor ;\n\tTue, 23 Jan 2024 09:51:00 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 8E8AF62936;\n\tTue, 23 Jan 2024 10:50:59 +0100 (CET)","from us-smtp-delivery-124.mimecast.com\n\t(us-smtp-delivery-124.mimecast.com [170.10.133.124])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id A8FCF61D3A\n\tfor ;\n\tTue, 23 Jan 2024 10:50:57 +0100 (CET)","from mail-wr1-f71.google.com (mail-wr1-f71.google.com\n\t[209.85.221.71]) by relay.mimecast.com with ESMTP with STARTTLS\n\t(version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id\n\tus-mta-504-lMk_q6D9P4WSga1pP5Y4FA-1; Tue, 23 Jan 2024 04:50:55 -0500","by mail-wr1-f71.google.com with SMTP id\n\tffacd0b85a97d-33920fc3a71so1720043f8f.0\n\tfor ;\n\tTue, 23 Jan 2024 01:50:54 -0800 (PST)","from nuthatch (nat-pool-brq-t.redhat.com. 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