xnu-2050.24.15.tar.gz

[apple/xnu.git] / osfmk / kern / stack.c

diff --git a/osfmk/kern/stack.c b/osfmk/kern/stack.c
index a5912256932b7222172b63e616ae5dfd9f24a259..9906b8b3a9a0364dd4d6574f89d864fe8b15b44f 100644 (file)
--- a/osfmk/kern/stack.c
+++ b/osfmk/kern/stack.c
@@ -39,6 +39,7 @@
 #include <kern/thread.h>
 #include <kern/zalloc.h>
 #include <kern/kalloc.h>
+#include <kern/ledger.h>
 
 #include <vm/vm_map.h>
 #include <vm/vm_kern.h>
@@ -63,6 +64,9 @@ static vm_offset_t            stack_free_list;
 static unsigned int            stack_free_count, stack_free_hiwat;             /* free list count */
 static unsigned int            stack_hiwat;
 unsigned int                   stack_total;                            /* current total count */
+unsigned long long             stack_allocs;                           /* total count of allocations */
+
+static int                     stack_fake_zone_index = -1;     /* index in zone_info array */
 
 static unsigned int            stack_free_target;
 static int                             stack_free_delta;
@@ -76,6 +80,54 @@ vm_offset_t                  kernel_stack_size = KERNEL_STACK_SIZE;
 vm_offset_t                    kernel_stack_mask = -KERNEL_STACK_SIZE;
 vm_offset_t                    kernel_stack_depth_max = 0;
 
+static inline void
+STACK_ZINFO_PALLOC(thread_t thread)
+{
+       task_t task;
+       zinfo_usage_t zinfo;
+
+       ledger_credit(thread->t_ledger, task_ledgers.tkm_private, kernel_stack_size);
+
+       if (stack_fake_zone_index != -1 &&
+           (task = thread->task) != NULL && (zinfo = task->tkm_zinfo) != NULL)
+               OSAddAtomic64(kernel_stack_size,
+                             (int64_t *)&zinfo[stack_fake_zone_index].alloc);
+}
+
+static inline void
+STACK_ZINFO_PFREE(thread_t thread)
+{
+       task_t task;
+       zinfo_usage_t zinfo;
+
+       ledger_debit(thread->t_ledger, task_ledgers.tkm_private, kernel_stack_size);
+
+       if (stack_fake_zone_index != -1 &&
+           (task = thread->task) != NULL && (zinfo = task->tkm_zinfo) != NULL)
+               OSAddAtomic64(kernel_stack_size, 
+                             (int64_t *)&zinfo[stack_fake_zone_index].free);
+}
+
+static inline void
+STACK_ZINFO_HANDOFF(thread_t from, thread_t to)
+{
+       ledger_debit(from->t_ledger, task_ledgers.tkm_private, kernel_stack_size);
+       ledger_credit(to->t_ledger, task_ledgers.tkm_private, kernel_stack_size);
+
+       if (stack_fake_zone_index != -1) {
+               task_t task;
+               zinfo_usage_t zinfo;
+       
+               if ((task = from->task) != NULL && (zinfo = task->tkm_zinfo) != NULL)
+                       OSAddAtomic64(kernel_stack_size, 
+                                     (int64_t *)&zinfo[stack_fake_zone_index].free);
+
+               if ((task = to->task) != NULL && (zinfo = task->tkm_zinfo) != NULL)
+                       OSAddAtomic64(kernel_stack_size, 
+                                     (int64_t *)&zinfo[stack_fake_zone_index].alloc);
+       }
+}
+
 /*
  *     The next field is at the base of the stack,
  *     so the low end is left unsullied.
@@ -98,6 +150,9 @@ roundup_pow2(vm_offset_t size)
        return 1UL << (log2(size - 1) + 1); 
 }
 
+static vm_offset_t stack_alloc_internal(void);
+static void stack_free_stack(vm_offset_t);
+
 void
 stack_init(void)
 {
@@ -125,18 +180,17 @@ stack_init(void)
  *     Allocate a stack for a thread, may
  *     block.
  */
-void
-stack_alloc(
-       thread_t        thread)
+
+static vm_offset_t 
+stack_alloc_internal(void)
 {
        vm_offset_t             stack;
        spl_t                   s;
        int                     guard_flags;
 
-       assert(thread->kernel_stack == 0);
-
        s = splsched();
        stack_lock();
+       stack_allocs++;
        stack = stack_free_list;
        if (stack != 0) {
                stack_free_list = stack_next(stack);
@@ -163,7 +217,7 @@ stack_alloc(
                if (kernel_memory_allocate(kernel_map, &stack,
                                           kernel_stack_size + (2*PAGE_SIZE),
                                           stack_addr_mask,
-                                          KMA_KOBJECT | guard_flags)
+                                          KMA_KSTACK | KMA_KOBJECT | guard_flags)
                    != KERN_SUCCESS)
                        panic("stack_alloc: kernel_memory_allocate");
 
@@ -174,8 +228,25 @@ stack_alloc(
 
                stack += PAGE_SIZE;
        }
+       return stack;
+}
+
+void
+stack_alloc(
+       thread_t        thread)
+{
+
+       assert(thread->kernel_stack == 0);
+       machine_stack_attach(thread, stack_alloc_internal());
+       STACK_ZINFO_PALLOC(thread);
+}
 
-       machine_stack_attach(thread, stack);
+void
+stack_handoff(thread_t from, thread_t to)
+{
+       assert(from == current_thread());
+       machine_stack_handoff(from, to);
+       STACK_ZINFO_HANDOFF(from, to);
 }
 
 /*
@@ -190,11 +261,23 @@ stack_free(
     vm_offset_t                stack = machine_stack_detach(thread);
 
        assert(stack);
-       if (stack != thread->reserved_stack)
+       if (stack != thread->reserved_stack) {
+               STACK_ZINFO_PFREE(thread);
                stack_free_stack(stack);
+       }
 }
 
 void
+stack_free_reserved(
+       thread_t        thread)
+{
+       if (thread->reserved_stack != thread->kernel_stack) {
+               stack_free_stack(thread->reserved_stack);
+               STACK_ZINFO_PFREE(thread);
+       }
+}
+
+static void
 stack_free_stack(
        vm_offset_t             stack)
 {
@@ -240,6 +323,7 @@ stack_alloc_try(
        cache = &PROCESSOR_DATA(current_processor(), stack_cache);
        stack = cache->free;
        if (stack != 0) {
+               STACK_ZINFO_PALLOC(thread);
                cache->free = stack_next(stack);
                cache->count--;
        }
@@ -248,6 +332,7 @@ stack_alloc_try(
                        stack_lock();
                        stack = stack_free_list;
                        if (stack != 0) {
+                               STACK_ZINFO_PALLOC(thread);
                                stack_free_list = stack_next(stack);
                                stack_free_count--;
                                stack_free_delta--;
@@ -360,14 +445,23 @@ __unused void             *arg)
 }
 
 void
-stack_fake_zone_info(int *count, vm_size_t *cur_size, vm_size_t *max_size, vm_size_t *elem_size,
-                    vm_size_t *alloc_size, int *collectable, int *exhaustable)
+stack_fake_zone_init(int zone_index)
+{
+       stack_fake_zone_index = zone_index;
+}
+
+void
+stack_fake_zone_info(int *count, 
+                    vm_size_t *cur_size, vm_size_t *max_size, vm_size_t *elem_size, vm_size_t *alloc_size,
+                    uint64_t *sum_size, int *collectable, int *exhaustable, int *caller_acct)
 {
        unsigned int    total, hiwat, free;
+       unsigned long long all;
        spl_t                   s;
 
        s = splsched();
        stack_lock();
+       all = stack_allocs;
        total = stack_total;
        hiwat = stack_hiwat;
        free = stack_free_count;
@@ -379,8 +473,11 @@ stack_fake_zone_info(int *count, vm_size_t *cur_size, vm_size_t *max_size, vm_si
        *max_size   = kernel_stack_size * hiwat;
        *elem_size  = kernel_stack_size;
        *alloc_size = kernel_stack_size;
+       *sum_size = all * kernel_stack_size;
+
        *collectable = 1;
        *exhaustable = 0;
+       *caller_acct = 1;
 }
 
 /* OBSOLETE */