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Wed, 20 Jan 2021 17:36:46 +0000 From: Alexander Bulekov To: qemu-devel@nongnu.org Subject: [PULL 4/7] fuzz: log the arguments used to initialize QEMU Date: Wed, 20 Jan 2021 12:35:30 -0500 Message-Id: <20210120173536.265601-9-alxndr@bu.edu> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210120173536.265601-1-alxndr@bu.edu> References: <20210120173536.265601-1-alxndr@bu.edu> X-Originating-IP: [72.74.210.193] X-ClientProxiedBy: BL1PR13CA0142.namprd13.prod.outlook.com (2603:10b6:208:2bb::27) To SN6PR03MB3871.namprd03.prod.outlook.com (2603:10b6:805:6d::32) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from stormtrooper.vrmnet (72.74.210.193) by BL1PR13CA0142.namprd13.prod.outlook.com (2603:10b6:208:2bb::27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3784.8 via Frontend Transport; Wed, 20 Jan 2021 17:36:43 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 8803ede8-8455-411f-324f-08d8bd69f457 X-MS-TrafficTypeDiagnostic: SA0PR03MB5530: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:962; 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envelope-from=alxndr@bu.edu; helo=NAM12-DM6-obe.outbound.protection.outlook.com X-Spam_score_int: -8 X-Spam_score: -0.9 X-Spam_bar: / X-Spam_report: (-0.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.998, 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=no 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: Laurent Vivier , Peter Maydell , Thomas Huth , Alexander Bulekov , Bandan Das , Stefan Hajnoczi , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is useful for building reproducers. Instead checking the code or the QEMU_FUZZ_ARGS, the arguments are at the top of the crash log. Signed-off-by: Alexander Bulekov Reviewed-by: Thomas Huth --- tests/qtest/fuzz/fuzz.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/tests/qtest/fuzz/fuzz.c b/tests/qtest/fuzz/fuzz.c index 238866a037..496d11a231 100644 --- a/tests/qtest/fuzz/fuzz.c +++ b/tests/qtest/fuzz/fuzz.c @@ -159,6 +159,8 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char ***envp) char *target_name; const char *bindir; char *datadir; + GString *cmd_line; + gchar *pretty_cmd_line; bool serialize = false; /* Initialize qgraph and modules */ @@ -217,7 +219,7 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char ***envp) } /* Run QEMU's softmmu main with the fuzz-target dependent arguments */ - GString *cmd_line = fuzz_target->get_init_cmdline(fuzz_target); + cmd_line = fuzz_target->get_init_cmdline(fuzz_target); g_string_append_printf(cmd_line, " %s -qtest /dev/null ", getenv("QTEST_LOG") ? "" : "-qtest-log none"); @@ -226,6 +228,13 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char ***envp) wordexp(cmd_line->str, &result, 0); g_string_free(cmd_line, true); + if (getenv("QTEST_LOG")) { + pretty_cmd_line = g_strjoinv(" ", result.we_wordv + 1); + printf("Starting %s with Arguments: %s\n", + result.we_wordv[0], pretty_cmd_line); + g_free(pretty_cmd_line); + } + qemu_init(result.we_wordc, result.we_wordv, NULL); /* re-enable the rcu atfork, which was previously disabled in qemu_init */