From nobody Wed Nov 5 10:51:23 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1534342927395670.7971078582395; Wed, 15 Aug 2018 07:22:07 -0700 (PDT) Received: from localhost ([::1]:49854 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fpwgY-0006w7-8a for importer@patchew.org; Wed, 15 Aug 2018 10:22:06 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39214) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fpweN-0004ni-S2 for qemu-devel@nongnu.org; Wed, 15 Aug 2018 10:19:52 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fpweK-0007UG-IK for qemu-devel@nongnu.org; Wed, 15 Aug 2018 10:19:51 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:53537 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fpweJ-0007Rj-UX for qemu-devel@nongnu.org; Wed, 15 Aug 2018 10:19:48 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3CAD9818F053 for ; Wed, 15 Aug 2018 14:19:47 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-117-62.ams2.redhat.com [10.36.117.62]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1109D2026D7E; Wed, 15 Aug 2018 14:19:46 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id AE0191138651; Wed, 15 Aug 2018 16:19:45 +0200 (CEST) From: Markus Armbruster To: qemu-devel@nongnu.org Date: Wed, 15 Aug 2018 16:19:45 +0200 Message-Id: <20180815141945.10457-2-armbru@redhat.com> In-Reply-To: <20180815141945.10457-1-armbru@redhat.com> References: <20180815141945.10457-1-armbru@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Wed, 15 Aug 2018 14:19:47 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Wed, 15 Aug 2018 14:19:47 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'armbru@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PATCH 1/1] libqtest: Improve error reporting for bad read from QEMU X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lvivier@redhat.com, pbonzini@redhat.com, thuth@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RDMRC_1 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" When read() from the qtest socket or the QMP socket fails or EOFs, we report "Broken pipe" and exit(1). This commonly happens when QEMU crashes. It also happens when QEMU refuses to run because the test passed it bad arguments. Sadly, we neglect to report either. Improve this by calling abort() instead of exit(1), so kill_qemu() runs, and reports how QEMU died. This improves error reporting to something like /x86_64/device/introspect/list: Broken pipe tests/libqtest.c:129: kill_qemu() detected QEMU death from signal 6 (Ab= orted) (dumped core) Three exit() remain in libqtest.c: * In qmp_response(), when we can't parse a QMP reply read from the QMP socket. Change to abort() for consistency. * In qtest_qemu_binary(), when QTEST_QEMU_BINARY isn't in the environment. This can only happen before we start QEMU. Leave alone. * In qtest_init_without_qmp_handshake(), when the fork()ed child fails to execlp(). Leave alone. exit() elsewhere are unlikely due to QEMU dying on us. If that should turn out to be wrong, we can move kill_qemu() from the abrt handler to atexit() or something. Signed-off-by: Markus Armbruster Reviewed-by: Eric Blake Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- tests/libqtest.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tests/libqtest.c b/tests/libqtest.c index b703fca26d..852ccff1ce 100644 --- a/tests/libqtest.c +++ b/tests/libqtest.c @@ -367,7 +367,7 @@ static GString *qtest_recv_line(QTestState *s) =20 if (len =3D=3D -1 || len =3D=3D 0) { fprintf(stderr, "Broken pipe\n"); - exit(1); + abort(); } =20 g_string_append_len(s->rx, buffer, len); @@ -454,7 +454,7 @@ static void qmp_response(JSONMessageParser *parser, GQu= eue *tokens) obj =3D json_parser_parse(tokens, NULL); if (!obj) { fprintf(stderr, "QMP JSON response parsing failed\n"); - exit(1); + abort(); } =20 g_assert(!qmp->response); @@ -480,7 +480,7 @@ QDict *qmp_fd_receive(int fd) =20 if (len =3D=3D -1 || len =3D=3D 0) { fprintf(stderr, "Broken pipe\n"); - exit(1); + abort(); } =20 if (log) { --=20 2.17.1