-#if DEVELOPMENT || DEBUG
-extern unsigned long vm_cs_validated_resets;
-#endif
-
-/*
- * Routine: mach_macx_triggers
- * Function:
- * Syscall interface to set the call backs for low and
- * high water marks.
- */
-int
-mach_macx_triggers(
- struct macx_triggers_args *args)
-{
- int hi_water = args->hi_water;
- int low_water = args->low_water;
- int flags = args->flags;
- mach_port_t trigger_name = args->alert_port;
- kern_return_t kr;
- memory_object_default_t default_pager;
- ipc_port_t trigger_port;
-
- default_pager = MEMORY_OBJECT_DEFAULT_NULL;
- kr = host_default_memory_manager(host_priv_self(),
- &default_pager, 0);
- if(kr != KERN_SUCCESS) {
- return EINVAL;
- }
-
- if (((flags & SWAP_ENCRYPT_ON) && (flags & SWAP_ENCRYPT_OFF)) ||
- ((flags & SWAP_COMPACT_ENABLE) && (flags & SWAP_COMPACT_DISABLE))) {
- /* can't have it both ways */
- return EINVAL;
- }
-
- if (default_pager_init_flag == 0) {
- start_def_pager(NULL);
- default_pager_init_flag = 1;
- }
-
- if (flags & SWAP_ENCRYPT_ON) {
- /* ENCRYPTED SWAP: tell default_pager to encrypt */
- default_pager_triggers(default_pager,
- 0, 0,
- SWAP_ENCRYPT_ON,
- IP_NULL);
- } else if (flags & SWAP_ENCRYPT_OFF) {
- /* ENCRYPTED SWAP: tell default_pager not to encrypt */
- default_pager_triggers(default_pager,
- 0, 0,
- SWAP_ENCRYPT_OFF,
- IP_NULL);
- }
-
- if (flags & USE_EMERGENCY_SWAP_FILE_FIRST) {
- /*
- * Time to switch to the emergency segment.
- */
- return default_pager_triggers(default_pager,
- 0, 0,
- USE_EMERGENCY_SWAP_FILE_FIRST,
- IP_NULL);
- }
-
- if (flags & SWAP_FILE_CREATION_ERROR) {
- /*
- * For some reason, the dynamic pager failed to create a swap file.
- */
- trigger_port = trigger_name_to_port(trigger_name);
- if(trigger_port == NULL) {
- return EINVAL;
- }
- /* trigger_port is locked and active */
- ipc_port_make_send_locked(trigger_port);
- ip_unlock(trigger_port);
- default_pager_triggers(default_pager,
- 0, 0,
- SWAP_FILE_CREATION_ERROR,
- trigger_port);
- }
-
- if (flags & HI_WAT_ALERT) {
- trigger_port = trigger_name_to_port(trigger_name);
- if(trigger_port == NULL) {
- return EINVAL;
- }
- /* trigger_port is locked and active */
- ipc_port_make_send_locked(trigger_port);
- ip_unlock(trigger_port);
- default_pager_triggers(default_pager,
- hi_water, low_water,
- HI_WAT_ALERT, trigger_port);
- }
-
- if (flags & LO_WAT_ALERT) {
- trigger_port = trigger_name_to_port(trigger_name);
- if(trigger_port == NULL) {
- return EINVAL;
- }
- /* trigger_port is locked and active */
- ipc_port_make_send_locked(trigger_port);
- ip_unlock(trigger_port);
- default_pager_triggers(default_pager,
- hi_water, low_water,
- LO_WAT_ALERT, trigger_port);
- }
-
-
- if (flags & PROC_RESUME) {
-
- /*
- * For this call, hi_water is used to pass in the pid of the process we want to resume
- * or unthrottle. This is of course restricted to the superuser (checked inside of
- * proc_resetpcontrol).
- */
-
- return proc_resetpcontrol(hi_water);
- }
-
- /*
- * Set thread scheduling priority and policy for the current thread
- * it is assumed for the time being that the thread setting the alert
- * is the same one which will be servicing it.
- *
- * XXX This does not belong in the kernel XXX
- */
- if (flags & HI_WAT_ALERT) {
- thread_precedence_policy_data_t pre;
- thread_extended_policy_data_t ext;
-
- ext.timeshare = FALSE;
- pre.importance = INT32_MAX;
-
- thread_policy_set(current_thread(),
- THREAD_EXTENDED_POLICY,
- (thread_policy_t)&ext,
- THREAD_EXTENDED_POLICY_COUNT);
projects / apple / xnu.git / blobdiff