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Mon, 19 Feb 2024 14:16:59 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9249520043; Mon, 19 Feb 2024 14:16:57 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EBAFF2004E; Mon, 19 Feb 2024 14:16:56 +0000 (GMT) Received: from black.boeblingen.de.ibm.com (unknown [9.155.200.166]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 19 Feb 2024 14:16:56 +0000 (GMT) From: Ilya Leoshkevich To: Warner Losh , =?utf-8?q?Alex_Benn=C3=A9e?= , Richard Henderson , Riku Voipio , Laurent Vivier Cc: Kyle Evans , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Alexandre Iooss , Mahmoud Mandour , Pierrick Bouvier , qemu-devel@nongnu.org, Ilya Leoshkevich Subject: [PATCH v4 04/12] gdbstub: Introduce gdbserver_fork_start() Date: Mon, 19 Feb 2024 15:15:52 +0100 Message-ID: <20240219141628.246823-5-iii@linux.ibm.com> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240219141628.246823-1-iii@linux.ibm.com> References: <20240219141628.246823-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: WHYD9bWmSNRe5AZDZ0d26D5E6MgTcmwb X-Proofpoint-ORIG-GUID: Nqew47rnNBnB0-9Cb-PFaBeOA_R6kGTf X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-19_10,2024-02-19_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 suspectscore=0 mlxscore=0 phishscore=0 lowpriorityscore=0 spamscore=0 bulkscore=0 mlxlogscore=999 priorityscore=1501 clxscore=1015 adultscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402190107 Received-SPF: pass client-ip=148.163.156.1; envelope-from=iii@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The upcoming follow-fork-mode child support requires knowing when fork() is about to happen in order to initialize its state. Add a hook for that. Reviewed-by: Alex Bennée Signed-off-by: Ilya Leoshkevich --- bsd-user/main.c | 1 + gdbstub/user.c | 4 ++++ include/gdbstub/user.h | 5 +++++ linux-user/main.c | 1 + 4 files changed, 11 insertions(+) diff --git a/bsd-user/main.c b/bsd-user/main.c index 72289673a94..35a27a07c8d 100644 --- a/bsd-user/main.c +++ b/bsd-user/main.c @@ -106,6 +106,7 @@ void fork_start(void) start_exclusive(); cpu_list_lock(); mmap_fork_start(); + gdbserver_fork_start(); } void fork_end(int child) diff --git a/gdbstub/user.c b/gdbstub/user.c index 3ce20b7bbfc..536fb43b03e 100644 --- a/gdbstub/user.c +++ b/gdbstub/user.c @@ -356,6 +356,10 @@ int gdbserver_start(const char *port_or_path) return -1; } +void gdbserver_fork_start(void) +{ +} + static void disable_gdbstub(CPUState *thread_cpu) { CPUState *cpu; diff --git a/include/gdbstub/user.h b/include/gdbstub/user.h index 68b6534130c..e33f8d9a9a6 100644 --- a/include/gdbstub/user.h +++ b/include/gdbstub/user.h @@ -45,6 +45,11 @@ static inline int gdb_handlesig(CPUState *cpu, int sig) */ void gdb_signalled(CPUArchState *as, int sig); +/** + * gdbserver_fork_start() - inform gdb of the upcoming fork() + */ +void gdbserver_fork_start(void); + /** * gdbserver_fork() - disable gdb stub for child processes. * @cs: CPU diff --git a/linux-user/main.c b/linux-user/main.c index 1d53f708354..dce6233ee49 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -144,6 +144,7 @@ void fork_start(void) mmap_fork_start(); cpu_list_lock(); qemu_plugin_user_prefork_lock(); + gdbserver_fork_start(); } void fork_end(int child)