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Tue, 29 Dec 2020 02:05:40 +0000 X-IncomingTopHeaderMarker: OriginalChecksum:267F89DFC67BDA122AD8F7150E65842B3D8706C8343A5D543FD16F99A2AFB159; UpperCasedChecksum:5E46B7E6C039DD4189C1FB385E8B32B2C5176FA1060B1B5CFED37AADCE540118; SizeAsReceived:7482; Count:45 Received: from ME3P282MB1745.AUSP282.PROD.OUTLOOK.COM ([fe80::88cb:2262:60f7:7d1e]) by ME3P282MB1745.AUSP282.PROD.OUTLOOK.COM ([fe80::88cb:2262:60f7:7d1e%8]) with mapi id 15.20.3700.031; Tue, 29 Dec 2020 02:05:40 +0000 From: Qiuhao Li To: alxndr@bu.edu, qemu-devel@nongnu.org Subject: [PATCH v3 0/7] fuzz: improve crash case minimization Date: Tue, 29 Dec 2020 10:05:09 +0800 Message-ID: X-Mailer: git-send-email 2.25.1 X-TMN: [6B/36Ibwb30hQUlXFO9XYJVMQQmrgm58a+btBdv3s0stUykgu1TElHxxAmN9YdKd] X-ClientProxiedBy: TY2PR02CA0046.apcprd02.prod.outlook.com (2603:1096:404:a6::34) To ME3P282MB1745.AUSP282.PROD.OUTLOOK.COM (2603:10c6:220:ac::12) X-Microsoft-Original-Message-ID: <20201229020509.3699326-1-Qiuhao.Li@outlook.com> MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from pc (2001:250:fe01:130:6d26:2348:77a5:f7ed) by TY2PR02CA0046.apcprd02.prod.outlook.com (2603:1096:404:a6::34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3700.27 via Frontend Transport; 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envelope-from=Qiuhao.Li@outlook.com; helo=APC01-SG2-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: thuth@redhat.com, Qiuhao Li , darren.kenny@oracle.com, bsd@redhat.com, stefanha@redhat.com, pbonzini@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Extend and refine the crash case minimization process. Test input: Bug 1909261 full_reproducer 6500 QTest instructions (write mostly) Refined (-M1 minimization level) vs. Original version: real 38m31.942s <-- real 532m57.192s user 28m18.188s <-- user 89m0.536s sys 12m42.239s <-- sys 50m33.074s 2558 instructions <-- 2846 instructions Test Enviroment: i7-8550U, 16GB LPDDR3, SSD Ubuntu 20.04.1 5.4.0-58-generic x86_64 Python 3.8.5 v2 --> v3: Fix: checkpatch.pl errors v1 --> v2: New: [PATCH v2 1/7] New: [PATCH v2 2/7] New: [PATCH v2 4/7] New: [PATCH v2 6/7] New: [PATCH v2 7/7] Fix: [PATCH 2/4] split using binary approach Fix: [PATCH 3/4] typo in comments Discard: [PATCH 1/4] the hardcoded regex match for crash detection Discard: [PATCH 4/4] the delaying minimizer Thanks for the suggestions from: Alexander Bulekov Qiuhao Li (7): fuzz: accelerate non-crash detection fuzz: double the IOs to remove for every loop fuzz: split write operand using binary approach fuzz: loop the remove minimizer and refactoring fuzz: add minimization options fuzz: set bits in operand of write/out to zero fuzz: heuristic split write based on past IOs scripts/oss-fuzz/minimize_qtest_trace.py | 260 ++++++++++++++++++----- 1 file changed, 212 insertions(+), 48 deletions(-)