From patchwork Wed Jun 25 08:26:48 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: fred.konrad@greensocs.com X-Patchwork-Id: 363863 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id D811114008C for ; Wed, 25 Jun 2014 18:33:36 +1000 (EST) Received: from localhost ([::1]:35962 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wzie6-0005Dl-RW for incoming@patchwork.ozlabs.org; Wed, 25 Jun 2014 04:33:34 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47789) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WziXz-0002UF-Pl for qemu-devel@nongnu.org; Wed, 25 Jun 2014 04:27:21 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WziXs-0008Kk-LW for qemu-devel@nongnu.org; Wed, 25 Jun 2014 04:27:15 -0400 Received: from [2001:41d0:8:2b42::1] (port=52848 helo=greensocs.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WziXs-0008Kc-FZ for qemu-devel@nongnu.org; Wed, 25 Jun 2014 04:27:08 -0400 Received: from localhost (localhost.localdomain [127.0.0.1]) by greensocs.com (Postfix) with ESMTP id 1C184280C1; Wed, 25 Jun 2014 10:27:21 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at Received: from greensocs.com ([127.0.0.1]) by localhost (greensocs.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id IPRFCKRhnWkG; Wed, 25 Jun 2014 10:27:21 +0200 (CEST) Received: by greensocs.com (Postfix, from userid 998) id 033F0280C3; Wed, 25 Jun 2014 10:27:21 +0200 (CEST) Received: from localhost.localdomain (lan31-11-83-155-143-136.fbx.proxad.net [83.155.143.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: fred.konrad@greensocs.com) by greensocs.com (Postfix) with ESMTPSA id 9BAAE280C1; Wed, 25 Jun 2014 10:27:20 +0200 (CEST) From: fred.konrad@greensocs.com To: qemu-devel@nongnu.org Date: Wed, 25 Jun 2014 10:26:48 +0200 Message-Id: <1403684808-23248-14-git-send-email-fred.konrad@greensocs.com> X-Mailer: git-send-email 1.9.0 In-Reply-To: <1403684808-23248-1-git-send-email-fred.konrad@greensocs.com> References: <1403684808-23248-1-git-send-email-fred.konrad@greensocs.com> X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2001:41d0:8:2b42::1 Cc: peter.maydell@linaro.org, quintela@redhat.com, mark.burton@greensocs.com, dgilbert@redhat.com, amit.shah@redhat.com, pbonzini@redhat.com, vilanova@ac.upc.edu, fred.konrad@greensocs.com Subject: [Qemu-devel] [RFC PATCH v4 13/13] cexe: allow to enable reverse execution. X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: KONRAD Frederic This creates QEMU options for reverse execution. Signed-off-by: KONRAD Frederic --- qemu-options.hx | 9 +++++++++ vl.c | 16 ++++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/qemu-options.hx b/qemu-options.hx index ff76ad4..2afb85d 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -2946,6 +2946,15 @@ order cores with complex cache hierarchies. The number of instructions executed often has little or no correlation with actual performance. ETEXI +DEF("cexe", 0, QEMU_OPTION_cexe, \ + "-cexe\n" \ + " enable reverse execution\n", QEMU_ARCH_ALL) +STEXI +@item -cexe +@findex -cexe +Enable reverse execution. +ETEXI + DEF("watchdog", HAS_ARG, QEMU_OPTION_watchdog, \ "-watchdog i6300esb|ib700\n" \ " enable virtual hardware watchdog [default=none]\n", diff --git a/vl.c b/vl.c index d0352e3..a94563a 100644 --- a/vl.c +++ b/vl.c @@ -228,6 +228,7 @@ static int default_floppy = 1; static int default_cdrom = 1; static int default_sdcard = 1; static int default_vga = 1; +static int default_cexe; static struct { const char *driver; @@ -3821,6 +3822,9 @@ int main(int argc, char **argv, char **envp) case QEMU_OPTION_icount: icount_option = optarg; break; + case QEMU_OPTION_cexe: + default_cexe = true; + break; case QEMU_OPTION_incoming: incoming = optarg; runstate_set(RUN_STATE_INMIGRATE); @@ -4520,6 +4524,15 @@ int main(int argc, char **argv, char **envp) vm_start(); } + if (default_cexe) { + if (!icount_option) { + fprintf(stderr, "Reverse execution requires icount.\n"); + exit(1); + } + + cexe_setup(); + } + os_setup_post(); if (is_daemonized()) { @@ -4536,5 +4549,8 @@ int main(int argc, char **argv, char **envp) tpm_cleanup(); #endif + if (cexe_is_enabled()) { + cexe_cleanup(); + } return 0; }