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Fri, 10 Jan 2025 14:13:00 +0000 (GMT) From: Ilya Leoshkevich To: Warner Losh , Riku Voipio , Laurent Vivier , Paolo Bonzini , Richard Henderson , =?utf-8?q?Alex_Benn=C3=A9?= =?utf-8?q?e?= Cc: Kyle Evans , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , qemu-devel@nongnu.org, =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Ilya Leoshkevich Subject: [PATCH v5 5/8] osdep: Introduce qemu_kill_thread() Date: Fri, 10 Jan 2025 15:09:37 +0100 Message-ID: <20250110141255.2328-6-iii@linux.ibm.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250110141255.2328-1-iii@linux.ibm.com> References: <20250110141255.2328-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: ifu_GApGND36f1yuJzn94Cr2YAa1EDNF X-Proofpoint-ORIG-GUID: ifu_GApGND36f1yuJzn94Cr2YAa1EDNF X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-15_01,2024-10-11_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 mlxlogscore=934 priorityscore=1501 spamscore=0 impostorscore=0 adultscore=0 suspectscore=0 lowpriorityscore=0 clxscore=1015 mlxscore=0 phishscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2501100110 Received-SPF: pass client-ip=148.163.156.1; envelope-from=iii@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=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: 2.1.29 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 Add a function for sending signals to individual threads. It does not make sense on Windows, so do not provide an implementation, so that if someone uses it by accident, they will get a linker error. Reviewed-by: Richard Henderson Reviewed-by: Warner Losh Signed-off-by: Ilya Leoshkevich --- include/qemu/osdep.h | 9 +++++++++ util/oslib-posix.c | 15 +++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index b94fb5fab8c..37ee3eabae3 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -630,6 +630,15 @@ bool qemu_write_pidfile(const char *pidfile, Error **errp); int qemu_get_thread_id(void); +/** + * qemu_kill_thread: + * @tid: thread id. + * @sig: host signal. + * + * Send @sig to one of QEMU's own threads with identifier @tid. + */ +int qemu_kill_thread(int tid, int sig); + #ifndef CONFIG_IOVEC struct iovec { void *iov_base; diff --git a/util/oslib-posix.c b/util/oslib-posix.c index 7a542cb50b5..f8eb3f17b2f 100644 --- a/util/oslib-posix.c +++ b/util/oslib-posix.c @@ -111,6 +111,21 @@ int qemu_get_thread_id(void) #endif } +int qemu_kill_thread(int tid, int sig) +{ +#if defined(__linux__) + return syscall(__NR_tgkill, getpid(), tid, sig); +#elif defined(__FreeBSD__) + return thr_kill2(getpid(), tid, sig); +#elif defined(__NetBSD__) + return _lwp_kill(tid, sig); +#elif defined(__OpenBSD__) + return thrkill(tid, sig, NULL); +#else + return kill(tid, sig); +#endif +} + int qemu_daemon(int nochdir, int noclose) { return daemon(nochdir, noclose);