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Thu, 30 Jul 2020 15:38:04 +0000 Received: from abhmp0001.oracle.com (abhmp0001.oracle.com [141.146.116.7]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 06UFc3LM007477; Thu, 30 Jul 2020 15:38:03 GMT Received: from ca-dev63.us.oracle.com (/10.211.8.221) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 30 Jul 2020 08:38:02 -0700 From: Steve Sistare To: qemu-devel@nongnu.org Subject: [PATCH V1 13/32] gdbstub: gdb support for suspended state Date: Thu, 30 Jul 2020 08:14:17 -0700 Message-Id: <1596122076-341293-14-git-send-email-steven.sistare@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1596122076-341293-1-git-send-email-steven.sistare@oracle.com> References: <1596122076-341293-1-git-send-email-steven.sistare@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9698 signatures=668679 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 adultscore=0 bulkscore=0 malwarescore=0 mlxscore=0 spamscore=0 mlxlogscore=999 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007300111 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9698 signatures=668679 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 clxscore=1015 malwarescore=0 spamscore=0 suspectscore=1 bulkscore=0 priorityscore=1501 phishscore=0 mlxlogscore=999 lowpriorityscore=0 impostorscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007300111 Received-SPF: pass client-ip=156.151.31.86; envelope-from=steven.sistare@oracle.com; helo=userp2130.oracle.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/30 11:37:58 X-ACL-Warn: Detected OS = Linux 3.1-3.10 [fuzzy] X-Spam_score_int: -63 X-Spam_score: -6.4 X-Spam_bar: ------ X-Spam_report: (-6.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=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: "Daniel P. Berrange" , "Michael S. Tsirkin" , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Juan Quintela , "Dr. David Alan Gilbert" , Markus Armbruster , Alex Williamson , Steve Sistare , Stefan Hajnoczi , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Modify the gdb server so a continue command appears to resume execution when in RUN_STATE_SUSPENDED. Do not print the next gdb prompt, but do not actually resume instruction fetch. While in this "fake" running mode, a ctrl-C returns the user to the gdb prompt. Signed-off-by: Steve Sistare --- gdbstub.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/gdbstub.c b/gdbstub.c index f3a318c..2f0d9ff 100644 --- a/gdbstub.c +++ b/gdbstub.c @@ -461,7 +461,9 @@ static inline void gdb_continue(void) #else if (!runstate_needs_reset()) { trace_gdbstub_op_continue(); - vm_start(); + if (!runstate_check(RUN_STATE_SUSPENDED)) { + vm_start(); + } } #endif } @@ -490,7 +492,7 @@ static int gdb_continue_partial(char *newstates) int flag = 0; if (!runstate_needs_reset()) { - if (vm_prepare_start()) { + if (!runstate_check(RUN_STATE_SUSPENDED) && vm_prepare_start()) { return 0; } @@ -2835,6 +2837,9 @@ static void gdb_read_byte(uint8_t ch) /* when the CPU is running, we cannot do anything except stop it when receiving a char */ vm_stop(RUN_STATE_PAUSED); + } else if (runstate_check(RUN_STATE_SUSPENDED) && ch == 3) { + /* Received ctrl-c from gdb */ + gdb_vm_state_change(0, 0, RUN_STATE_PAUSED); } else #endif { @@ -3282,6 +3287,8 @@ static void gdb_sigterm_handler(int signal) { if (runstate_is_running()) { vm_stop(RUN_STATE_PAUSED); + } else if (runstate_check(RUN_STATE_SUSPENDED)) { + gdb_vm_state_change(0, 0, RUN_STATE_PAUSED); } } #endif -- 1.8.3.1