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{ "id": 19426, "url": "https://patchwork.libcamera.org/api/patches/19426/?format=api", "web_url": "https://patchwork.libcamera.org/patch/19426/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20240121035948.4226-6-laurent.pinchart@ideasonboard.com>", "date": "2024-01-21T03:59:41", "name": "[libcamera-devel,05/12] test: event-thread: Destroy Object from correct thread context", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "516cb0899b024a3249cfdd6ebb0e44596e6d6b1b", "submitter": { "id": 2, "url": "https://patchwork.libcamera.org/api/people/2/?format=api", "name": "Laurent Pinchart", "email": "laurent.pinchart@ideasonboard.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/19426/mbox/", "series": [ { "id": 4149, "url": "https://patchwork.libcamera.org/api/series/4149/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=4149", "date": "2024-01-21T03:59:36", "name": "libcamera: Hardening against thread race conditions", "version": 1, "mbox": "https://patchwork.libcamera.org/series/4149/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/19426/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/19426/checks/", "tags": {}, "headers": { "Return-Path": "<libcamera-devel-bounces@lists.libcamera.org>", "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 84310C32BC\n\tfor <parsemail@patchwork.libcamera.org>;\n\tSun, 21 Jan 2024 03:59:57 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 253F562945;\n\tSun, 21 Jan 2024 04:59:57 +0100 (CET)", "from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id A00946293E\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tSun, 21 Jan 2024 04:59:52 +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 8DD798D4;\n\tSun, 21 Jan 2024 04:58:40 +0100 (CET)" ], "DKIM-Signature": [ "v=1; 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dkim=pass (1024-bit key; \n\tunprotected) header.d=ideasonboard.com\n\theader.i=@ideasonboard.com\n\theader.b=\"c9s0JG50\"; dkim-atps=neutral", "To": "libcamera-devel@lists.libcamera.org", "Date": "Sun, 21 Jan 2024 05:59:41 +0200", "Message-ID": "<20240121035948.4226-6-laurent.pinchart@ideasonboard.com>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<20240121035948.4226-1-laurent.pinchart@ideasonboard.com>", "References": "<20240121035948.4226-1-laurent.pinchart@ideasonboard.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH 05/12] test: event-thread: Destroy Object\n\tfrom correct thread context", "X-BeenThere": "libcamera-devel@lists.libcamera.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "From": "Laurent Pinchart via libcamera-devel\n\t<libcamera-devel@lists.libcamera.org>", "Reply-To": "Laurent Pinchart <laurent.pinchart@ideasonboard.com>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "The EventHandler used in the test is destroyed from the main thread,\nwhich is invalid for a thread-bound object bound to a different thread.\nFix it by destroying it with deleteLater().\n\nSigned-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>\n---\n test/event-thread.cpp | 37 +++++++++++++++++++++++++++----------\n 1 file changed, 27 insertions(+), 10 deletions(-)", "diff": "diff --git a/test/event-thread.cpp b/test/event-thread.cpp\nindex 88a8c07ef9f0..d6e5d27af185 100644\n--- a/test/event-thread.cpp\n+++ b/test/event-thread.cpp\n@@ -85,10 +85,17 @@ private:\n class EventThreadTest : public Test\n {\n protected:\n+\tint init()\n+\t{\n+\t\tthread_.start();\n+\n+\t\thandler_ = new EventHandler();\n+\n+\t\treturn TestPass;\n+\t}\n+\n \tint run()\n \t{\n-\t\tThread thread;\n-\t\tthread.start();\n \n \t\t/*\n \t\t * Fire the event notifier and then move the notifier to a\n@@ -98,23 +105,33 @@ protected:\n \t\t * different thread will correctly process already pending\n \t\t * events in the new thread.\n \t\t */\n-\t\tEventHandler handler;\n-\t\thandler.notify();\n-\t\thandler.moveToThread(&thread);\n+\t\thandler_->notify();\n+\t\thandler_->moveToThread(&thread_);\n \n \t\tthis_thread::sleep_for(chrono::milliseconds(100));\n \n-\t\t/* Must stop thread before destroying the handler. */\n-\t\tthread.exit(0);\n-\t\tthread.wait();\n-\n-\t\tif (!handler.notified()) {\n+\t\tif (!handler_->notified()) {\n \t\t\tcout << \"Thread event handling test failed\" << endl;\n \t\t\treturn TestFail;\n \t\t}\n \n \t\treturn TestPass;\n \t}\n+\n+\tvoid cleanup()\n+\t{\n+\t\t/*\n+\t\t * Object class instances must be destroyed from the thread\n+\t\t * they live in.\n+\t\t */\n+\t\thandler_->deleteLater();\n+\t\tthread_.exit(0);\n+\t\tthread_.wait();\n+\t}\n+\n+private:\n+\tEventHandler *handler_;\n+\tThread thread_;\n };\n \n TEST_REGISTER(EventThreadTest)\n", "prefixes": [ "libcamera-devel", "05/12" ] }