From nobody Mon Feb 9 03:29:21 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1610373410; cv=none; d=zohomail.com; s=zohoarc; b=AZajyLJht2kckPb5lgc8eU8HcJJZ+8qv5kVyix3d21ZO2801Cqc6KCnQv6OrXZYlcnvubpRVhqZmXjARK8flJTErM39CGEnDyV7qn3bvZX0rSm5UC4IVBnlP5IUNRmZa5vSF31bHTT0vJmFwCIwgLhecKT+NF+xoCCJXOxabddw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1610373410; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=Gq49cOEfMMs77Yl4299xFFf2rjGK8IXwDJOnTUpWTbk=; b=J2IESr3qhth0Cs7HBcscEnEbj+mwzu5GpBctvLHkH8O6TNA6RE1rtMTDAzoUD/sVgQjDjrrj5tWXYv1Tp7Y2UNxchg0W2A78sZXxF0J80NWBdGCWbCnLQqHKTKZfLHvwIO8JF7u8N2HC7bmeHz+WMP3K+E9GB9Wc7AcDmRWoLEg= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 161037341022317.97574713299366; Mon, 11 Jan 2021 05:56:50 -0800 (PST) Received: from localhost ([::1]:58844 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kyxge-0001uC-Sl for importer@patchew.org; Mon, 11 Jan 2021 08:56:48 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:52790) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kyxUP-0002lm-32 for qemu-devel@nongnu.org; Mon, 11 Jan 2021 08:44:09 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:46654) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kyxUM-00083a-JJ for qemu-devel@nongnu.org; Mon, 11 Jan 2021 08:44:08 -0500 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-281-QjiVH_zROLq5csbhWC0iEw-1; Mon, 11 Jan 2021 08:44:02 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id BD25381CBDF; Mon, 11 Jan 2021 13:44:00 +0000 (UTC) Received: from thuth.com (ovpn-112-147.ams2.redhat.com [10.36.112.147]) by smtp.corp.redhat.com (Postfix) with ESMTP id C3AE417C5F; Mon, 11 Jan 2021 13:43:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1610372644; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Gq49cOEfMMs77Yl4299xFFf2rjGK8IXwDJOnTUpWTbk=; b=cFowyMheQKX5aGBrYx2qJsZCpYI06t2oNu8Y4gDtNjITiBAiqlgJB4Qa0D4GHrns4/9Woi 2sEHSfkOR+QHh3K/z12Enc6nZTV4Z181VnZOTYiXa885sAje5bVhB/kutx5CRsOpm/GtQO sP117l2ssmIVYBdCmEghjwPN1VlkLZM= X-MC-Unique: QjiVH_zROLq5csbhWC0iEw-1 From: Thomas Huth To: qemu-devel@nongnu.org, Peter Maydell Subject: [PULL 09/15] fuzz: add minimization options Date: Mon, 11 Jan 2021 14:43:22 +0100 Message-Id: <20210111134328.157775-10-thuth@redhat.com> In-Reply-To: <20210111134328.157775-1-thuth@redhat.com> References: <20210111134328.157775-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=thuth@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.205.24.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.251, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=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: Alexander Bulekov , Warner Losh , Qiuhao Li Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Qiuhao Li -M1: remove IO commands iteratively -M2: try setting bits in operand of write/out to zero Signed-off-by: Qiuhao Li Reviewed-by: Alexander Bulekov Tested-by: Alexander Bulekov Message-Id: Signed-off-by: Thomas Huth --- scripts/oss-fuzz/minimize_qtest_trace.py | 30 ++++++++++++++++++++---- 1 file changed, 26 insertions(+), 4 deletions(-) diff --git a/scripts/oss-fuzz/minimize_qtest_trace.py b/scripts/oss-fuzz/mi= nimize_qtest_trace.py index 219858a9e3..0e59bdbb01 100755 --- a/scripts/oss-fuzz/minimize_qtest_trace.py +++ b/scripts/oss-fuzz/minimize_qtest_trace.py @@ -16,6 +16,10 @@ QEMU_PATH =3D None TIMEOUT =3D 5 CRASH_TOKEN =3D None =20 +# Minimization levels +M1 =3D False # try removing IO commands iteratively +M2 =3D False # try setting bits in operand of write/out to zero + write_suffix_lookup =3D {"b": (1, "B"), "w": (2, "H"), "l": (4, "L"), @@ -23,10 +27,20 @@ write_suffix_lookup =3D {"b": (1, "B"), =20 def usage(): sys.exit("""\ -Usage: QEMU_PATH=3D"/path/to/qemu" QEMU_ARGS=3D"args" {} input_trace outpu= t_trace +Usage: + +QEMU_PATH=3D"/path/to/qemu" QEMU_ARGS=3D"args" {} [Options] input_trace ou= tput_trace + By default, will try to use the second-to-last line in the output to ident= ify whether the crash occred. Optionally, manually set a string that idenitife= s the crash by setting CRASH_TOKEN=3D + +Options: + +-M1: enable a loop around the remove minimizer, which may help decrease so= me + timing dependant instructions. Off by default. +-M2: try setting bits in operand of write/out to zero. Off by default. + """.format((sys.argv[0]))) =20 deduplication_note =3D """\n\ @@ -216,24 +230,32 @@ def minimize_trace(inpath, outpath): print("Setting the timeout for {} seconds".format(TIMEOUT)) =20 newtrace =3D trace[:] + global M1, M2 =20 # remove lines old_len =3D len(newtrace) + 1 while(old_len > len(newtrace)): old_len =3D len(newtrace) + print("trace lenth =3D ", old_len) remove_lines(newtrace, outpath) + if not M1 and not M2: + break newtrace =3D list(filter(lambda s: s !=3D "", newtrace)) assert(check_if_trace_crashes(newtrace, outpath)) =20 # set bits to zero - clear_bits(newtrace, outpath) + if M2: + clear_bits(newtrace, outpath) assert(check_if_trace_crashes(newtrace, outpath)) =20 =20 if __name__ =3D=3D '__main__': if len(sys.argv) < 3: usage() - + if "-M1" in sys.argv: + M1 =3D True + if "-M2" in sys.argv: + M2 =3D True QEMU_PATH =3D os.getenv("QEMU_PATH") QEMU_ARGS =3D os.getenv("QEMU_ARGS") if QEMU_PATH is None or QEMU_ARGS is None: @@ -242,4 +264,4 @@ if __name__ =3D=3D '__main__': # QEMU_ARGS +=3D " -accel qtest" CRASH_TOKEN =3D os.getenv("CRASH_TOKEN") QEMU_ARGS +=3D " -qtest stdio -monitor none -serial none " - minimize_trace(sys.argv[1], sys.argv[2]) + minimize_trace(sys.argv[-2], sys.argv[-1]) --=20 2.27.0