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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1767891852; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8BrKAlIwhHS96rT72QvsgWREA7RZadYiubuuKFJpTdE=; b=MyrxZGNpbVw/4CQv5PElrtuOuBnGIIVw37KJqJ8funFZcu5abk5m9ZDVtKdHQFFoD6WWJJ CXJ+d79M6NmELTUlA8zIIaA73ov9GF/9OTGrD8QfgvWdsEU82uK84baJcylpMDno4+rNhD QZa5cLjJu93TPXxvKT7FqbIgM5+OQKc= X-MC-Unique: 6gxIFJt6NU2xuroQmxNQFA-1 X-Mimecast-MFC-AGG-ID: 6gxIFJt6NU2xuroQmxNQFA_1767891847 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Manos Pitsidianakis , Hanna Reitz , Gerd Hoffmann , Paolo Bonzini , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Christian Schoenebeck , "Dr. David Alan Gilbert" , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , devel@lists.libvirt.org, qemu-block@nongnu.org, qemu-rust@nongnu.org, Markus Armbruster , Stefan Weil , Kevin Wolf , Richard Henderson Subject: [PATCH v5 05/24] util: expose qemu_thread_set_name Date: Thu, 8 Jan 2026 17:03:19 +0000 Message-ID: <20260108170338.2693853-6-berrange@redhat.com> In-Reply-To: <20260108170338.2693853-1-berrange@redhat.com> References: <20260108170338.2693853-1-berrange@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1767891883932158500 The ability to set the thread name needs to be used in a number of places, so expose the current impls as public methods. Reviewed-by: Richard Henderson Reviewed-by: Dr. David Alan Gilbert Reviewed-by: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Daniel P. Berrang=C3=A9 Reviewed-by: Markus Armbruster --- include/qemu/thread.h | 1 + util/qemu-thread-posix.c | 26 ++++++++++++++++---------- util/qemu-thread-win32.c | 13 ++++++++----- 3 files changed, 25 insertions(+), 15 deletions(-) diff --git a/include/qemu/thread.h b/include/qemu/thread.h index 3a286bb3ef..27b888ab0a 100644 --- a/include/qemu/thread.h +++ b/include/qemu/thread.h @@ -215,6 +215,7 @@ void *qemu_thread_join(QemuThread *thread); void qemu_thread_get_self(QemuThread *thread); bool qemu_thread_is_self(QemuThread *thread); G_NORETURN void qemu_thread_exit(void *retval); +void qemu_thread_set_name(const char *name); =20 struct Notifier; /** diff --git a/util/qemu-thread-posix.c b/util/qemu-thread-posix.c index 7c985b5d38..b1c127dbe3 100644 --- a/util/qemu-thread-posix.c +++ b/util/qemu-thread-posix.c @@ -329,6 +329,21 @@ static void qemu_thread_atexit_notify(void *arg) notifier_list_notify(&thread_exit, NULL); } =20 +void qemu_thread_set_name(const char *name) +{ + /* + * Attempt to set the threads name; note that this is for debug, so + * we're not going to fail if we can't set it. + */ +# if defined(CONFIG_PTHREAD_SETNAME_NP_W_TID) + pthread_setname_np(pthread_self(), name); +# elif defined(CONFIG_PTHREAD_SETNAME_NP_WO_TID) + pthread_setname_np(name); +# elif defined(CONFIG_PTHREAD_SET_NAME_NP) + pthread_set_name_np(pthread_self(), name); +# endif +} + typedef struct { void *(*start_routine)(void *); void *arg; @@ -342,17 +357,8 @@ static void *qemu_thread_start(void *args) void *arg =3D qemu_thread_args->arg; void *r; =20 - /* Attempt to set the threads name; note that this is for debug, so - * we're not going to fail if we can't set it. - */ if (qemu_thread_args->name) { -# if defined(CONFIG_PTHREAD_SETNAME_NP_W_TID) - pthread_setname_np(pthread_self(), qemu_thread_args->name); -# elif defined(CONFIG_PTHREAD_SETNAME_NP_WO_TID) - pthread_setname_np(qemu_thread_args->name); -# elif defined(CONFIG_PTHREAD_SET_NAME_NP) - pthread_set_name_np(pthread_self(), qemu_thread_args->name); -# endif + qemu_thread_set_name(qemu_thread_args->name); } QEMU_TSAN_ANNOTATE_THREAD_NAME(qemu_thread_args->name); g_free(qemu_thread_args->name); diff --git a/util/qemu-thread-win32.c b/util/qemu-thread-win32.c index 9595a5b090..4d2d663a9a 100644 --- a/util/qemu-thread-win32.c +++ b/util/qemu-thread-win32.c @@ -225,6 +225,7 @@ struct QemuThreadData { void *arg; short mode; NotifierList exit; + char *name; =20 /* Only used for joinable threads. */ bool exited; @@ -266,6 +267,10 @@ static unsigned __stdcall win32_start_routine(void *ar= g) void *(*start_routine)(void *) =3D data->start_routine; void *thread_arg =3D data->arg; =20 + if (data->name) { + qemu_thread_set_name(data->name); + g_clear_pointer(&data->name, g_free); + } qemu_thread_data =3D data; qemu_thread_exit(start_routine(thread_arg)); abort(); @@ -316,7 +321,7 @@ void *qemu_thread_join(QemuThread *thread) return ret; } =20 -static void set_thread_description(HANDLE h, const char *name) +void qemu_thread_set_name(const char *name) { g_autofree wchar_t *namew =3D NULL; =20 @@ -329,7 +334,7 @@ static void set_thread_description(HANDLE h, const char= *name) return; } =20 - SetThreadDescriptionFunc(h, namew); + SetThreadDescriptionFunc(GetCurrentThread(), namew); } =20 void qemu_thread_create(QemuThread *thread, const char *name, @@ -344,6 +349,7 @@ void qemu_thread_create(QemuThread *thread, const char = *name, data->arg =3D arg; data->mode =3D mode; data->exited =3D false; + data->name =3D g_strdup(name); notifier_list_init(&data->exit); =20 if (data->mode !=3D QEMU_THREAD_DETACHED) { @@ -355,9 +361,6 @@ void qemu_thread_create(QemuThread *thread, const char = *name, if (!hThread) { error_exit(GetLastError(), __func__); } - if (name) { - set_thread_description(hThread, name); - } CloseHandle(hThread); =20 thread->data =3D data; --=20 2.52.0