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Fri, 8 Jan 2021 06:32:15 +0000 X-IncomingTopHeaderMarker: OriginalChecksum:58113F4F9A221870D51310C9D657746AB19A50733E78F465EFA8EBB5AF8CD5CB; UpperCasedChecksum:F201285D7744BF76AA0828C8656B8800BF7BFBD911BF0A995A10040971D5BD45; SizeAsReceived:7467; Count:45 Received: from MEAPR01MB3494.ausprd01.prod.outlook.com ([fe80::2d4d:a683:7f83:cf50]) by MEAPR01MB3494.ausprd01.prod.outlook.com ([fe80::2d4d:a683:7f83:cf50%7]) with mapi id 15.20.3742.006; Fri, 8 Jan 2021 06:32:14 +0000 From: Qiuhao Li To: alxndr@bu.edu, qemu-devel@nongnu.org Subject: [PATCH v6 0/7] fuzz: improve crash case minimization Date: Fri, 8 Jan 2021 14:32:03 +0800 Message-ID: X-Mailer: git-send-email 2.25.1 X-TMN: [dDcTs2ypmDHt988u+ny5uY+E+OLLScByFX1I5UNFEVpW0htQiR0gWlh96QPyk8U8] X-ClientProxiedBy: TYCPR01CA0033.jpnprd01.prod.outlook.com (2603:1096:405:1::21) To MEAPR01MB3494.ausprd01.prod.outlook.com (2603:10c6:201:39::11) X-Microsoft-Original-Message-ID: <20210108063203.16861-1-Qiuhao.Li@outlook.com> MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from XPS-13-9360 (2001:250:fe01:130:10c6:c22f:85d6:f9d) by TYCPR01CA0033.jpnprd01.prod.outlook.com (2603:1096:405:1::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3742.6 via Frontend Transport; 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envelope-from=Qiuhao.Li@outlook.com; helo=APC01-HK2-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 v6: Fix: add Reviewed-by and Tested-by tags v5: Fix: send SIGKILL on timeout Fix: rename minimization functions v4: Fix: messy diff in [PATCH v3 4/7] v3: Fix: checkpatch.pl errors 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: remove IO commands iteratively fuzz: set bits in operand of write/out to zero fuzz: add minimization options fuzz: heuristic split write based on past IOs scripts/oss-fuzz/minimize_qtest_trace.py | 257 ++++++++++++++++++----- 1 file changed, 210 insertions(+), 47 deletions(-)