From patchwork Fri Jun 5 09:47:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Hajnoczi X-Patchwork-Id: 281317 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MIME_BASE64_TEXT,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10AF0C433E0 for ; Fri, 5 Jun 2020 09:52:36 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C58BB2075B for ; Fri, 5 Jun 2020 09:52:35 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Fri, 5 Jun 2020 09:49:07 +0000 (UTC) Received: from localhost (ovpn-114-214.ams2.redhat.com [10.36.114.214]) by smtp.corp.redhat.com (Postfix) with ESMTP id 811607CCEF; Fri, 5 Jun 2020 09:48:58 +0000 (UTC) From: Stefan Hajnoczi To: Peter Maydell , qemu-devel@nongnu.org Subject: [PULL 06/11] fuzz: run the main-loop in fork-server process Date: Fri, 5 Jun 2020 10:47:45 +0100 Message-Id: <20200605094750.149957-7-stefanha@redhat.com> In-Reply-To: <20200605094750.149957-1-stefanha@redhat.com> References: <20200605094750.149957-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=207.211.31.120; envelope-from=stefanha@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/05 03:07:04 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -3 X-Spam_score: -0.4 X-Spam_bar: / X-Spam_report: (-0.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MIME_BASE64_TEXT=1.741, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN 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: Fam Zheng , Kevin Wolf , Thomas Huth , qemu-block@nongnu.org, Darren Kenny , Laurent Vivier , Julia Suvorova , Max Reitz , Alexander Bulekov , Bandan Das , qemu-arm@nongnu.org, Stefan Hajnoczi , Keith Busch , Paolo Bonzini , Aarushi Mehta , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Alexander Bulekov Without this, the time since the last main-loop keeps increasing, as the fuzzer runs. The forked children need to handle all the "past-due" timers, slowing them down, over time. With this change, the parent/fork-server process runs the main-loop, while waiting on the child, ensuring that the timer events do not pile up, over time. Signed-off-by: Alexander Bulekov Reviewed-by: Darren Kenny Message-id: 20200512030133.29896-5-alxndr@bu.edu Signed-off-by: Stefan Hajnoczi --- tests/qtest/fuzz/i440fx_fuzz.c | 1 + tests/qtest/fuzz/virtio_net_fuzz.c | 2 ++ tests/qtest/fuzz/virtio_scsi_fuzz.c | 2 ++ 3 files changed, 5 insertions(+) diff --git a/tests/qtest/fuzz/i440fx_fuzz.c b/tests/qtest/fuzz/i440fx_fuzz.c index 775b3041ba..e2f31e56f9 100644 --- a/tests/qtest/fuzz/i440fx_fuzz.c +++ b/tests/qtest/fuzz/i440fx_fuzz.c @@ -151,6 +151,7 @@ static void i440fx_fuzz_qos_fork(QTestState *s, i440fx_fuzz_qos(s, Data, Size); _Exit(0); } else { + flush_events(s); wait(NULL); } } diff --git a/tests/qtest/fuzz/virtio_net_fuzz.c b/tests/qtest/fuzz/virtio_net_fuzz.c index d08a47e278..a33bd73067 100644 --- a/tests/qtest/fuzz/virtio_net_fuzz.c +++ b/tests/qtest/fuzz/virtio_net_fuzz.c @@ -122,6 +122,7 @@ static void virtio_net_fork_fuzz(QTestState *s, flush_events(s); _Exit(0); } else { + flush_events(s); wait(NULL); } } @@ -134,6 +135,7 @@ static void virtio_net_fork_fuzz_check_used(QTestState *s, flush_events(s); _Exit(0); } else { + flush_events(s); wait(NULL); } } diff --git a/tests/qtest/fuzz/virtio_scsi_fuzz.c b/tests/qtest/fuzz/virtio_scsi_fuzz.c index 3b95247f12..51dce491ab 100644 --- a/tests/qtest/fuzz/virtio_scsi_fuzz.c +++ b/tests/qtest/fuzz/virtio_scsi_fuzz.c @@ -145,6 +145,7 @@ static void virtio_scsi_fork_fuzz(QTestState *s, flush_events(s); _Exit(0); } else { + flush_events(s); wait(NULL); } } @@ -164,6 +165,7 @@ static void virtio_scsi_with_flag_fuzz(QTestState *s, } _Exit(0); } else { + flush_events(s); wait(NULL); } }