osfmk/kern/coalition.c

33 #include <kern/coalition.h>
75 struct coalition {
84 	 * Count the length of time this coalition had at least one active task.
90 	uint64_t task_count;		/* Count of tasks that have started in this coalition */
91 	uint64_t dead_task_count;	/* Count of tasks that have exited in this coalition; subtract from task_count to get count of "active" */
92 	queue_head_t tasks;		/* List of active tasks in the coalition */
99 	uint32_t active_count;		/* Number of members of (tasks in) the coalition, plus vouchers referring to the coalition */
101 	unsigned int privileged : 1;	/* Members of this coalition may create and manage coalitions and may posix_spawn processes into selected coalitions */
107 	/* state of the coalition */
108 	unsigned int termrequested : 1;		/* launchd has requested termination when coalition becomes empty */
109 	unsigned int terminated : 1;		/* coalition became empty and spawns are now forbidden */
168 	 * Start with the coalition's ledger, which holds the totals from all
178 	 * out from under us, since we hold the coalition lock.
188 	/* collect information from the coalition itself */
236  * Returns: New coalition object, referenced for the caller and unlocked.
242 	struct coalition *new_coal = (struct coalition *)zalloc(coalition_zone);
278  * Condition: coalition must be UNLOCKED.
343 		panic("resurrecting coalition %p id %llu, active_count = %u\n",
364  * This is the function to use when putting a 'new' thing into a coalition,
386 		/* Too late to put something new into this coalition, it's
394 		panic("resurrecting coalition %p id %llu, active_count = %u\n",
425 	return task->coalition->id;
437 	return task->coalition->privileged || unrestrict_coalition_syscalls;
443  * Condition: Caller must have a coalition reference.
453  * coalition, and want to extend it to a second activation owned by a new
454  * object, like when a task in the coalition calls fork(). This is analogous
464 		panic("cannot make a reaped coalition active again");
522 		panic("failed to adopt task %p into default coalition: %d", task, kr);
529  * Condition: Coalition must be referenced and unlocked. Will fail if coalition
535 	if (task->coalition) {
549 	task->coalition = coal;
555 		panic("%s: coalition %p id %llu task_count < dead_task_count", __func__, coal, coal->id);
579  * Condition: task must be referenced and UNLOCKED; task's coalition must be UNLOCKED
584 	coalition_t coal = task->coalition;
593 		panic("%s: coalition %p id %llu task_count < dead_task_count", __func__, coal, coal->id);
718 			sizeof(struct coalition),
719 			CONFIG_COALITION_MAX * sizeof(struct coalition),
720 			COALITION_CHUNK * sizeof(struct coalition),
731 	lck_grp_init(&coalitions_lck_grp, "coalition", &coalitions_lck_grp_attr);
739 		panic("%s: could not create default coalition: %d", __func__, kr);