diff options
| -rw-r--r-- | Makefrag.am | 8 | ||||
| -rw-r--r-- | include/mach/gnumach.defs | 8 | ||||
| -rw-r--r-- | include/mach/task_notify.defs | 36 | ||||
| -rw-r--r-- | kern/task.c | 33 | ||||
| -rw-r--r-- | kern/task_notify.cli | 7 |
5 files changed, 92 insertions, 0 deletions
diff --git a/Makefrag.am b/Makefrag.am index 5e98b21..410f56d 100644 --- a/Makefrag.am +++ b/Makefrag.am @@ -364,6 +364,7 @@ include_mach_HEADERS = \ include/mach/mach.defs \ include/mach/mach4.defs \ include/mach/gnumach.defs \ + include/mach/task_notify.defs \ include/mach/mach_host.defs \ include/mach/mach_port.defs \ include/mach/mach_types.defs \ @@ -488,6 +489,13 @@ nodist_libkernel_a_SOURCES += \ # device/device_reply.user.defs # device/memory_object_reply.user.defs +nodist_lib_dep_tr_for_defs_a_SOURCES += \ + kern/task_notify.user.defs.c +nodist_libkernel_a_SOURCES += \ + kern/task_notify.user.h \ + kern/task_notify.user.c \ + kern/task_notify.user.msgids + # Server stubs. nodist_lib_dep_tr_for_defs_a_SOURCES += \ device/device.server.defs.c \ diff --git a/include/mach/gnumach.defs b/include/mach/gnumach.defs index 6cfbb0d..bac3b09 100644 --- a/include/mach/gnumach.defs +++ b/include/mach/gnumach.defs @@ -72,3 +72,11 @@ simpleroutine thread_terminate_release( simpleroutine task_set_name( task : task_t; name : kernel_debug_name_t); + +/* + * Register a port to which a notification about newly created tasks + * are sent. + */ +routine register_new_task_notification( + host_priv : host_priv_t; + notification : mach_port_send_t); diff --git a/include/mach/task_notify.defs b/include/mach/task_notify.defs new file mode 100644 index 0000000..5485d4e --- /dev/null +++ b/include/mach/task_notify.defs @@ -0,0 +1,36 @@ +/* + * Copyright (C) 2014 Free Software Foundation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +subsystem +#if KERNEL_SERVER + KernelServer +#endif /* KERNEL_SERVER */ +#if KERNEL_USER + KernelUser +#endif /* KERNEL_USER */ + task_notify 4400; + +#include <mach/std_types.defs> +#include <mach/mach_types.defs> + +/* These notifications are sent to the port registered via + `register_new_task_notification' and provide a robust parental + relation between tasks. */ +simpleroutine mach_notify_new_task( + notify : mach_port_t; + task : task_t; + parent : task_t); diff --git a/kern/task.c b/kern/task.c index 44963c6..a11fb8e 100644 --- a/kern/task.c +++ b/kern/task.c @@ -50,12 +50,16 @@ #include <kern/sched_prim.h> /* for thread_wakeup */ #include <kern/ipc_tt.h> #include <kern/syscall_emulation.h> +#include <kern/task_notify.user.h> #include <vm/vm_kern.h> /* for kernel_map, ipc_kernel_map */ #include <machine/machspl.h> /* for splsched */ task_t kernel_task = TASK_NULL; struct kmem_cache task_cache; +/* Where to send notifications about newly created tasks. */ +ipc_port_t new_task_notification = NULL; + void task_init(void) { kmem_cache_init(&task_cache, "task", sizeof(struct task), 0, @@ -169,6 +173,14 @@ kern_return_t task_create( snprintf (new_task->name, sizeof new_task->name, "%p", new_task); + if (new_task_notification != NULL) { + task_reference (new_task); + task_reference (parent_task); + mach_notify_new_task (new_task_notification, + convert_task_to_port (new_task), + convert_task_to_port (parent_task)); + } + ipc_task_enable(new_task); *child_task = new_task; @@ -1249,3 +1261,24 @@ task_ras_control( #endif /* FAST_TAS */ return ret; } + +/* + * register_new_task_notification + * + * Register a port to which a notification about newly created + * tasks are sent. + */ +kern_return_t +register_new_task_notification( + const host_t host, + ipc_port_t notification) +{ + if (host == HOST_NULL) + return KERN_INVALID_HOST; + + if (new_task_notification != NULL) + return KERN_NO_ACCESS; + + new_task_notification = notification; + return KERN_SUCCESS; +} diff --git a/kern/task_notify.cli b/kern/task_notify.cli new file mode 100644 index 0000000..c6c85d9 --- /dev/null +++ b/kern/task_notify.cli @@ -0,0 +1,7 @@ +/* XXX */ + +/* This is a client presentation file. */ + +#define KERNEL_USER 1 + +#include <mach/task_notify.defs> |