/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2011 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
-/*
- * HISTORY
- *
- * Revision 1.1.1.1 1998/09/22 21:05:34 wsanchez
- * Import of Mac OS X kernel (~semeria)
- *
- * Revision 1.1.1.1 1998/03/07 02:25:55 wsanchez
- * Import of OSF Mach kernel (~mburg)
- *
- * Revision 1.2.19.5 1995/02/24 15:20:29 alanl
- * Lock package cleanup.
- * [95/02/15 alanl]
- *
- * Merge with DIPC2_SHARED.
- * [1995/01/05 15:11:02 alanl]
- *
- * Revision 1.2.28.2 1994/11/10 06:12:50 dwm
- * mk6 CR764 - s/spinlock/simple_lock/ (name change only)
- * [1994/11/10 05:28:35 dwm]
- *
- * Revision 1.2.28.1 1994/11/04 10:07:40 dwm
- * mk6 CR668 - 1.3b26 merge
- * * Revision 1.2.2.4 1993/11/08 15:04:18 gm
- * CR9710: Updated to new zinit() and zone_change() interfaces.
- * * End1.3merge
- * [1994/11/04 09:25:48 dwm]
- *
- * Revision 1.2.19.3 1994/09/23 02:20:52 ezf
- * change marker to not FREE
- * [1994/09/22 21:33:57 ezf]
- *
- * Revision 1.2.19.2 1994/06/14 18:36:36 bolinger
- * NMK17.2 merge: Replace simple_lock ops.
- * [1994/06/14 18:35:17 bolinger]
- *
- * Revision 1.2.19.1 1994/06/14 17:04:23 bolinger
- * Merge up to NMK17.2.
- * [1994/06/14 16:54:19 bolinger]
- *
- * Revision 1.2.23.3 1994/10/14 12:24:33 sjs
- * Removed krealloc_spinl routine: the newer locking scheme makes it
- * obsolete.
- * [94/10/13 sjs]
- *
- * Revision 1.2.23.2 1994/08/11 14:42:46 rwd
- * Post merge cleanup
- * [94/08/09 rwd]
- *
- * Changed zcollectable to use zchange.
- * [94/08/04 rwd]
- *
- * Revision 1.2.17.2 1994/07/08 01:58:45 alanl
- * Change comment to match function name.
- * [1994/07/08 01:47:59 alanl]
- *
- * Revision 1.2.17.1 1994/05/26 16:20:38 sjs
- * Added krealloc_spinl: same as krealloc but uses spin locks.
- * [94/05/25 sjs]
- *
- * Revision 1.2.23.1 1994/08/04 02:24:55 mmp
- * Added krealloc_spinl: same as krealloc but uses spin locks.
- * [94/05/25 sjs]
- *
- * Revision 1.2.13.1 1994/02/11 14:27:12 paire
- * Changed krealloc() to make it work on a MP system. Added a new parameter
- * which is the simple lock that should be held while modifying the memory
- * area already initialized.
- * Change from NMK16.1 [93/09/02 paire]
- *
- * Do not set debug for kalloc zones as default. It wastes
- * to much space.
- * Change from NMK16.1 [93/08/16 bernadat]
- * [94/02/07 paire]
- *
- * Revision 1.2.2.3 1993/07/28 17:15:44 bernard
- * CR9523 -- Prototypes.
- * [1993/07/27 20:14:12 bernard]
- *
- * Revision 1.2.2.2 1993/06/02 23:37:46 jeffc
- * Added to OSF/1 R1.3 from NMK15.0.
- * [1993/06/02 21:12:59 jeffc]
- *
- * Revision 1.2 1992/12/07 21:28:42 robert
- * integrate any changes below for 14.0 (branch from 13.16 base)
- *
- * Joseph Barrera (jsb) at Carnegie-Mellon University 11-Sep-92
- * Added krealloc. Added kalloc_max_prerounded for quicker choice between
- * zalloc and kmem_alloc. Renamed MINSIZE to KALLOC_MINSIZE.
- * [1992/12/06 19:47:16 robert]
- *
- * Revision 1.1 1992/09/30 02:09:23 robert
- * Initial revision
- *
- * $EndLog$
- */
-/* CMU_HIST */
-/*
- * Revision 2.9 91/05/14 16:43:17 mrt
- * Correcting copyright
- *
- * Revision 2.8 91/03/16 14:50:37 rpd
- * Updated for new kmem_alloc interface.
- * [91/03/03 rpd]
- *
- * Revision 2.7 91/02/05 17:27:22 mrt
- * Changed to new Mach copyright
- * [91/02/01 16:14:12 mrt]
- *
- * Revision 2.6 90/06/19 22:59:06 rpd
- * Made the big kalloc zones collectable.
- * [90/06/05 rpd]
- *
- * Revision 2.5 90/06/02 14:54:47 rpd
- * Added kalloc_max, kalloc_map_size.
- * [90/03/26 22:06:39 rpd]
- *
- * Revision 2.4 90/01/11 11:43:13 dbg
- * De-lint.
- * [89/12/06 dbg]
- *
- * Revision 2.3 89/09/08 11:25:51 dbg
- * MACH_KERNEL: remove non-MACH data types.
- * [89/07/11 dbg]
- *
- * Revision 2.2 89/08/31 16:18:59 rwd
- * First Checkin
- * [89/08/23 15:41:37 rwd]
- *
- * Revision 2.6 89/08/02 08:03:28 jsb
- * Make all kalloc zones 8 MB big. (No more kalloc panics!)
- * [89/08/01 14:10:17 jsb]
- *
- * Revision 2.4 89/04/05 13:03:10 rvb
- * Guarantee a zone max of at least 100 elements or 10 pages
- * which ever is greater. Afs (AllocDouble()) puts a great demand
- * on the 2048 zone and used to blow away.
- * [89/03/09 rvb]
- *
- * Revision 2.3 89/02/25 18:04:39 gm0w
- * Changes for cleanup.
- *
- * Revision 2.2 89/01/18 02:07:04 jsb
- * Give each kalloc zone a meaningful name (for panics);
- * create a zone for each power of 2 between MINSIZE
- * and PAGE_SIZE, instead of using (obsoleted) NQUEUES.
- * [89/01/17 10:16:33 jsb]
- *
- *
- * 13-Feb-88 John Seamons (jks) at NeXT
- * Updated to use kmem routines instead of vmem routines.
- *
- * 21-Jun-85 Avadis Tevanian (avie) at Carnegie-Mellon University
- * Created.
- */
-/* CMU_ENDHIST */
/*
* Mach Operating System
* Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
#include <kern/zalloc.h>
#include <kern/kalloc.h>
#include <kern/lock.h>
+#include <kern/ledger.h>
#include <vm/vm_kern.h>
#include <vm/vm_object.h>
#include <vm/vm_map.h>
+#include <libkern/OSMalloc.h>
#ifdef MACH_BSD
zone_t kalloc_zone(vm_size_t);
#endif
+#define KALLOC_MAP_SIZE_MIN (16 * 1024 * 1024)
+#define KALLOC_MAP_SIZE_MAX (128 * 1024 * 1024)
vm_map_t kalloc_map;
-vm_size_t kalloc_map_size = 16 * 1024 * 1024;
vm_size_t kalloc_max;
vm_size_t kalloc_max_prerounded;
+vm_size_t kalloc_kernmap_size; /* size of kallocs that can come from kernel map */
unsigned int kalloc_large_inuse;
vm_size_t kalloc_large_total;
vm_size_t kalloc_large_max;
+vm_size_t kalloc_largest_allocated = 0;
+uint64_t kalloc_large_sum;
+
+int kalloc_fake_zone_index = -1; /* index of our fake zone in statistics arrays */
+
+vm_offset_t kalloc_map_min;
+vm_offset_t kalloc_map_max;
+
+#ifdef MUTEX_ZONE
+/*
+ * Diagnostic code to track mutexes separately rather than via the 2^ zones
+ */
+ zone_t lck_mtx_zone;
+#endif
+
+static void
+KALLOC_ZINFO_SALLOC(vm_size_t bytes)
+{
+ thread_t thr = current_thread();
+ task_t task;
+ zinfo_usage_t zinfo;
+
+ ledger_debit(thr->t_ledger, task_ledgers.tkm_shared, bytes);
+
+ if (kalloc_fake_zone_index != -1 &&
+ (task = thr->task) != NULL && (zinfo = task->tkm_zinfo) != NULL)
+ zinfo[kalloc_fake_zone_index].alloc += bytes;
+}
+
+static void
+KALLOC_ZINFO_SFREE(vm_size_t bytes)
+{
+ thread_t thr = current_thread();
+ task_t task;
+ zinfo_usage_t zinfo;
+
+ ledger_credit(thr->t_ledger, task_ledgers.tkm_shared, bytes);
+
+ if (kalloc_fake_zone_index != -1 &&
+ (task = thr->task) != NULL && (zinfo = task->tkm_zinfo) != NULL)
+ zinfo[kalloc_fake_zone_index].free += bytes;
+}
/*
* All allocations of size less than kalloc_max are rounded to the
- * next highest power of 2. This allocator is built on top of
+ * next nearest sized zone. This allocator is built on top of
* the zone allocator. A zone is created for each potential size
* that we are willing to get in small blocks.
*
* We assume that kalloc_max is not greater than 64K;
- * thus 16 is a safe array size for k_zone and k_zone_name.
*
* Note that kalloc_max is somewhat confusingly named.
* It represents the first power of two for which no zone exists.
* kalloc_max_prerounded is the smallest allocation size, before
* rounding, for which no zone exists.
+ *
+ * Also if the allocation size is more than kalloc_kernmap_size
+ * then allocate from kernel map rather than kalloc_map.
+ */
+
+#if KALLOC_MINSIZE == 16 && KALLOC_LOG2_MINALIGN == 4
+
+/*
+ * "Legacy" aka "power-of-2" backing zones with 16-byte minimum
+ * size and alignment. Users of this profile would probably
+ * benefit from some tuning.
+ */
+
+#define K_ZONE_SIZES \
+ 16, \
+ 32, \
+/* 6 */ 64, \
+ 128, \
+ 256, \
+/* 9 */ 512, \
+ 1024, \
+ 2048, \
+/* C */ 4096
+
+
+#define K_ZONE_NAMES \
+ "kalloc.16", \
+ "kalloc.32", \
+/* 6 */ "kalloc.64", \
+ "kalloc.128", \
+ "kalloc.256", \
+/* 9 */ "kalloc.512", \
+ "kalloc.1024", \
+ "kalloc.2048", \
+/* C */ "kalloc.4096"
+
+#define K_ZONE_MAXIMA \
+ 1024, \
+ 4096, \
+/* 6 */ 4096, \
+ 4096, \
+ 4096, \
+/* 9 */ 1024, \
+ 1024, \
+ 1024, \
+/* C */ 1024
+
+#elif KALLOC_MINSIZE == 8 && KALLOC_LOG2_MINALIGN == 3
+
+/*
+ * Tweaked for ARM (and x64) in 04/2011
*/
-int first_k_zone = -1;
-struct zone *k_zone[16];
-static char *k_zone_name[16] = {
- "kalloc.1", "kalloc.2",
- "kalloc.4", "kalloc.8",
- "kalloc.16", "kalloc.32",
- "kalloc.64", "kalloc.128",
- "kalloc.256", "kalloc.512",
- "kalloc.1024", "kalloc.2048",
- "kalloc.4096", "kalloc.8192",
- "kalloc.16384", "kalloc.32768"
+#define K_ZONE_SIZES \
+/* 3 */ 8, \
+ 16, 24, \
+ 32, 40, 48, \
+/* 6 */ 64, 88, 112, \
+ 128, 192, \
+ 256, 384, \
+/* 9 */ 512, 768, \
+ 1024, 1536, \
+ 2048, 3072, \
+ 4096, 6144
+
+#define K_ZONE_NAMES \
+/* 3 */ "kalloc.8", \
+ "kalloc.16", "kalloc.24", \
+ "kalloc.32", "kalloc.40", "kalloc.48", \
+/* 6 */ "kalloc.64", "kalloc.88", "kalloc.112", \
+ "kalloc.128", "kalloc.192", \
+ "kalloc.256", "kalloc.384", \
+/* 9 */ "kalloc.512", "kalloc.768", \
+ "kalloc.1024", "kalloc.1536", \
+ "kalloc.2048", "kalloc.3072", \
+ "kalloc.4096", "kalloc.6144"
+
+#define K_ZONE_MAXIMA \
+/* 3 */ 1024, \
+ 1024, 1024, \
+ 4096, 4096, 4096, \
+/* 6 */ 4096, 4096, 4096, \
+ 4096, 4096, \
+ 4096, 4096, \
+/* 9 */ 1024, 1024, \
+ 1024, 1024, \
+ 1024, 1024, \
+/* C */ 1024, 64
+
+#else
+#error missing zone size parameters for kalloc
+#endif
+
+#define KALLOC_MINALIGN (1 << KALLOC_LOG2_MINALIGN)
+
+static const int k_zone_size[] = {
+ K_ZONE_SIZES,
+ 8192,
+ 16384,
+/* F */ 32768
+};
+
+#define N_K_ZONE (sizeof (k_zone_size) / sizeof (k_zone_size[0]))
+
+/*
+ * Many kalloc() allocations are for small structures containing a few
+ * pointers and longs - the k_zone_dlut[] direct lookup table, indexed by
+ * size normalized to the minimum alignment, finds the right zone index
+ * for them in one dereference.
+ */
+
+#define INDEX_ZDLUT(size) \
+ (((size) + KALLOC_MINALIGN - 1) / KALLOC_MINALIGN)
+#define N_K_ZDLUT (2048 / KALLOC_MINALIGN)
+ /* covers sizes [0 .. 2048 - KALLOC_MINALIGN] */
+#define MAX_SIZE_ZDLUT ((N_K_ZDLUT - 1) * KALLOC_MINALIGN)
+
+static int8_t k_zone_dlut[N_K_ZDLUT]; /* table of indices into k_zone[] */
+
+/*
+ * If there's no hit in the DLUT, then start searching from k_zindex_start.
+ */
+static int k_zindex_start;
+
+static zone_t k_zone[N_K_ZONE];
+
+static const char *k_zone_name[N_K_ZONE] = {
+ K_ZONE_NAMES,
+ "kalloc.8192",
+ "kalloc.16384",
+/* F */ "kalloc.32768"
};
/*
* based on need, rather than just guessing; it also
* means its patchable in case you're wrong!
*/
-unsigned long k_zone_max[16] = {
- 1024, /* 1 Byte */
- 1024, /* 2 Byte */
- 1024, /* 4 Byte */
- 1024, /* 8 Byte */
- 1024, /* 16 Byte */
- 4096, /* 32 Byte */
- 4096, /* 64 Byte */
- 4096, /* 128 Byte */
- 4096, /* 256 Byte */
- 1024, /* 512 Byte */
- 1024, /* 1024 Byte */
- 1024, /* 2048 Byte */
- 1024, /* 4096 Byte */
- 4096, /* 8192 Byte */
- 64, /* 16384 Byte */
- 64, /* 32768 Byte */
+unsigned int k_zone_max[N_K_ZONE] = {
+ K_ZONE_MAXIMA,
+ 4096,
+ 64,
+/* F */ 64
};
+/* #define KALLOC_DEBUG 1 */
+
+/* forward declarations */
+void * kalloc_canblock(
+ vm_size_t size,
+ boolean_t canblock);
+
+
+lck_grp_t *kalloc_lck_grp;
+lck_mtx_t kalloc_lock;
+
+#define kalloc_spin_lock() lck_mtx_lock_spin(&kalloc_lock)
+#define kalloc_unlock() lck_mtx_unlock(&kalloc_lock)
+
+
+/* OSMalloc local data declarations */
+static
+queue_head_t OSMalloc_tag_list;
+
+lck_grp_t *OSMalloc_tag_lck_grp;
+lck_mtx_t OSMalloc_tag_lock;
+
+#define OSMalloc_tag_spin_lock() lck_mtx_lock_spin(&OSMalloc_tag_lock)
+#define OSMalloc_tag_unlock() lck_mtx_unlock(&OSMalloc_tag_lock)
+
+
+/* OSMalloc forward declarations */
+void OSMalloc_init(void);
+void OSMalloc_Tagref(OSMallocTag tag);
+void OSMalloc_Tagrele(OSMallocTag tag);
+
/*
* Initialize the memory allocator. This should be called only
* once on a system wide basis (i.e. first processor to get here
{
kern_return_t retval;
vm_offset_t min;
- vm_size_t size;
+ vm_size_t size, kalloc_map_size;
register int i;
+ /*
+ * Scale the kalloc_map_size to physical memory size: stay below
+ * 1/8th the total zone map size, or 128 MB (for a 32-bit kernel).
+ */
+ kalloc_map_size = (vm_size_t)(sane_size >> 5);
+#if !__LP64__
+ if (kalloc_map_size > KALLOC_MAP_SIZE_MAX)
+ kalloc_map_size = KALLOC_MAP_SIZE_MAX;
+#endif /* !__LP64__ */
+ if (kalloc_map_size < KALLOC_MAP_SIZE_MIN)
+ kalloc_map_size = KALLOC_MAP_SIZE_MIN;
+
retval = kmem_suballoc(kernel_map, &min, kalloc_map_size,
- FALSE, TRUE, &kalloc_map);
+ FALSE, VM_FLAGS_ANYWHERE | VM_FLAGS_PERMANENT,
+ &kalloc_map);
+
if (retval != KERN_SUCCESS)
panic("kalloc_init: kmem_suballoc failed");
+ kalloc_map_min = min;
+ kalloc_map_max = min + kalloc_map_size - 1;
+
/*
* Ensure that zones up to size 8192 bytes exist.
* This is desirable because messages are allocated
else
kalloc_max = PAGE_SIZE;
kalloc_max_prerounded = kalloc_max / 2 + 1;
+ /* size it to be more than 16 times kalloc_max (256k) for allocations from kernel map */
+ kalloc_kernmap_size = (kalloc_max * 16) + 1;
+ kalloc_largest_allocated = kalloc_kernmap_size;
/*
* Allocate a zone for each size we are going to handle.
- * We specify non-paged memory.
+ * We specify non-paged memory. Don't charge the caller
+ * for the allocation, as we aren't sure how the memory
+ * will be handled.
*/
- for (i = 0, size = 1; size < kalloc_max; i++, size <<= 1) {
- if (size < KALLOC_MINSIZE) {
- k_zone[i] = 0;
- continue;
- }
- if (size == KALLOC_MINSIZE) {
- first_k_zone = i;
- }
+ for (i = 0; (size = k_zone_size[i]) < kalloc_max; i++) {
k_zone[i] = zinit(size, k_zone_max[i] * size, size,
k_zone_name[i]);
+ zone_change(k_zone[i], Z_CALLERACCT, FALSE);
+ }
+
+ /*
+ * Build the Direct LookUp Table for small allocations
+ */
+ for (i = 0, size = 0; i <= N_K_ZDLUT; i++, size += KALLOC_MINALIGN) {
+ int zindex = 0;
+
+ while ((vm_size_t)k_zone_size[zindex] < size)
+ zindex++;
+
+ if (i == N_K_ZDLUT) {
+ k_zindex_start = zindex;
+ break;
+ }
+ k_zone_dlut[i] = (int8_t)zindex;
}
+
+#ifdef KALLOC_DEBUG
+ printf("kalloc_init: k_zindex_start %d\n", k_zindex_start);
+
+ /*
+ * Do a quick synthesis to see how well/badly we can
+ * find-a-zone for a given size.
+ * Useful when debugging/tweaking the array of zone sizes.
+ * Cache misses probably more critical than compare-branches!
+ */
+ for (i = 0; i < (int)N_K_ZONE; i++) {
+ vm_size_t testsize = (vm_size_t)k_zone_size[i] - 1;
+ int compare = 0;
+ int zindex;
+
+ if (testsize < MAX_SIZE_ZDLUT) {
+ compare += 1; /* 'if' (T) */
+
+ long dindex = INDEX_ZDLUT(testsize);
+ zindex = (int)k_zone_dlut[dindex];
+
+ } else if (testsize < kalloc_max_prerounded) {
+
+ compare += 2; /* 'if' (F), 'if' (T) */
+
+ zindex = k_zindex_start;
+ while ((vm_size_t)k_zone_size[zindex] < testsize) {
+ zindex++;
+ compare++; /* 'while' (T) */
+ }
+ compare++; /* 'while' (F) */
+ } else
+ break; /* not zone-backed */
+
+ zone_t z = k_zone[zindex];
+ printf("kalloc_init: req size %4lu: %11s took %d compare%s\n",
+ (unsigned long)testsize, z->zone_name, compare,
+ compare == 1 ? "" : "s");
+ }
+#endif
+ kalloc_lck_grp = lck_grp_alloc_init("kalloc.large", LCK_GRP_ATTR_NULL);
+ lck_mtx_init(&kalloc_lock, kalloc_lck_grp, LCK_ATTR_NULL);
+ OSMalloc_init();
+#ifdef MUTEX_ZONE
+ lck_mtx_zone = zinit(sizeof(struct _lck_mtx_), 1024*256, 4096, "lck_mtx");
+#endif
}
-vm_offset_t
+/*
+ * Given an allocation size, return the kalloc zone it belongs to.
+ * Direct LookUp Table variant.
+ */
+static __inline zone_t
+get_zone_dlut(vm_size_t size)
+{
+ long dindex = INDEX_ZDLUT(size);
+ int zindex = (int)k_zone_dlut[dindex];
+ return (k_zone[zindex]);
+}
+
+/* As above, but linear search k_zone_size[] for the next zone that fits. */
+
+static __inline zone_t
+get_zone_search(vm_size_t size, int zindex)
+{
+ assert(size < kalloc_max_prerounded);
+
+ while ((vm_size_t)k_zone_size[zindex] < size)
+ zindex++;
+
+ assert((unsigned)zindex < N_K_ZONE &&
+ (vm_size_t)k_zone_size[zindex] < kalloc_max);
+
+ return (k_zone[zindex]);
+}
+
+void *
kalloc_canblock(
vm_size_t size,
boolean_t canblock)
{
- register int zindex;
- register vm_size_t allocsize;
-
- /*
- * If size is too large for a zone, then use kmem_alloc.
- * (We use kmem_alloc instead of kmem_alloc_wired so that
- * krealloc can use kmem_realloc.)
- */
-
- if (size >= kalloc_max_prerounded) {
- vm_offset_t addr;
+ zone_t z;
+
+ if (size < MAX_SIZE_ZDLUT)
+ z = get_zone_dlut(size);
+ else if (size < kalloc_max_prerounded)
+ z = get_zone_search(size, k_zindex_start);
+ else {
+ /*
+ * If size is too large for a zone, then use kmem_alloc.
+ * (We use kmem_alloc instead of kmem_alloc_kobject so that
+ * krealloc can use kmem_realloc.)
+ */
+ vm_map_t alloc_map;
+ void *addr;
/* kmem_alloc could block so we return if noblock */
if (!canblock) {
- return(0);
+ return(NULL);
}
- if (kmem_alloc(kalloc_map, &addr, size) != KERN_SUCCESS)
- addr = 0;
- if (addr) {
+ if (size >= kalloc_kernmap_size)
+ alloc_map = kernel_map;
+ else
+ alloc_map = kalloc_map;
+
+ if (kmem_alloc(alloc_map, (vm_offset_t *)&addr, size) != KERN_SUCCESS) {
+ if (alloc_map != kernel_map) {
+ if (kmem_alloc(kernel_map, (vm_offset_t *)&addr, size) != KERN_SUCCESS)
+ addr = NULL;
+ }
+ else
+ addr = NULL;
+ }
+
+ if (addr != NULL) {
+ kalloc_spin_lock();
+ /*
+ * Thread-safe version of the workaround for 4740071
+ * (a double FREE())
+ */
+ if (size > kalloc_largest_allocated)
+ kalloc_largest_allocated = size;
+
kalloc_large_inuse++;
kalloc_large_total += size;
+ kalloc_large_sum += size;
if (kalloc_large_total > kalloc_large_max)
kalloc_large_max = kalloc_large_total;
- }
- return(addr);
- }
- /* compute the size of the block that we will actually allocate */
+ kalloc_unlock();
- allocsize = KALLOC_MINSIZE;
- zindex = first_k_zone;
- while (allocsize < size) {
- allocsize <<= 1;
- zindex++;
+ KALLOC_ZINFO_SALLOC(size);
+ }
+ return(addr);
}
-
- /* allocate from the appropriate zone */
-
- assert(allocsize < kalloc_max);
- return(zalloc_canblock(k_zone[zindex], canblock));
+#ifdef KALLOC_DEBUG
+ if (size > z->elem_size)
+ panic("%s: z %p (%s) but requested size %lu", __func__,
+ z, z->zone_name, (unsigned long)size);
+#endif
+ assert(size <= z->elem_size);
+ return (zalloc_canblock(z, canblock));
}
-vm_offset_t
+void *
kalloc(
vm_size_t size)
{
- return( kalloc_canblock(size, TRUE) );
+ return( kalloc_canblock(size, TRUE) );
}
-vm_offset_t
+void *
kalloc_noblock(
vm_size_t size)
{
- return( kalloc_canblock(size, FALSE) );
+ return( kalloc_canblock(size, FALSE) );
}
+volatile SInt32 kfree_nop_count = 0;
void
-krealloc(
- vm_offset_t *addrp,
- vm_size_t old_size,
- vm_size_t new_size,
- simple_lock_t lock)
+kfree(
+ void *data,
+ vm_size_t size)
{
- register int zindex;
- register vm_size_t allocsize;
- vm_offset_t naddr;
+ zone_t z;
+
+ if (size < MAX_SIZE_ZDLUT)
+ z = get_zone_dlut(size);
+ else if (size < kalloc_max_prerounded)
+ z = get_zone_search(size, k_zindex_start);
+ else {
+ /* if size was too large for a zone, then use kmem_free */
+
+ vm_map_t alloc_map = kernel_map;
+
+ if ((((vm_offset_t) data) >= kalloc_map_min) && (((vm_offset_t) data) <= kalloc_map_max))
+ alloc_map = kalloc_map;
+ if (size > kalloc_largest_allocated) {
+ /*
+ * work around double FREEs of small MALLOCs
+ * this used to end up being a nop
+ * since the pointer being freed from an
+ * alloc backed by the zalloc world could
+ * never show up in the kalloc_map... however,
+ * the kernel_map is a different issue... since it
+ * was released back into the zalloc pool, a pointer
+ * would have gotten written over the 'size' that
+ * the MALLOC was retaining in the first 4 bytes of
+ * the underlying allocation... that pointer ends up
+ * looking like a really big size on the 2nd FREE and
+ * pushes the kfree into the kernel_map... we
+ * end up removing a ton of virtual space before we panic
+ * this check causes us to ignore the kfree for a size
+ * that must be 'bogus'... note that it might not be due
+ * to the above scenario, but it would still be wrong and
+ * cause serious damage.
+ */
+
+ OSAddAtomic(1, &kfree_nop_count);
+ return;
+ }
+ kmem_free(alloc_map, (vm_offset_t)data, size);
- /* can only be used for increasing allocation size */
+ kalloc_spin_lock();
- assert(new_size > old_size);
+ kalloc_large_total -= size;
+ kalloc_large_inuse--;
- /* if old_size is zero, then we are simply allocating */
+ kalloc_unlock();
- if (old_size == 0) {
- simple_unlock(lock);
- naddr = kalloc(new_size);
- simple_lock(lock);
- *addrp = naddr;
+ KALLOC_ZINFO_SFREE(size);
return;
}
- /* if old block was kmem_alloc'd, then use kmem_realloc if necessary */
-
- if (old_size >= kalloc_max_prerounded) {
- old_size = round_page(old_size);
- new_size = round_page(new_size);
- if (new_size > old_size) {
-
- if (kmem_realloc(kalloc_map, *addrp, old_size, &naddr,
- new_size) != KERN_SUCCESS) {
- panic("krealloc: kmem_realloc");
- naddr = 0;
- }
-
- simple_lock(lock);
- *addrp = naddr;
-
- /* kmem_realloc() doesn't free old page range. */
- kmem_free(kalloc_map, *addrp, old_size);
-
- kalloc_large_total += (new_size - old_size);
-
- if (kalloc_large_total > kalloc_large_max)
- kalloc_large_max = kalloc_large_total;
- }
- return;
- }
+ /* free to the appropriate zone */
+#ifdef KALLOC_DEBUG
+ if (size > z->elem_size)
+ panic("%s: z %p (%s) but requested size %lu", __func__,
+ z, z->zone_name, (unsigned long)size);
+#endif
+ assert(size <= z->elem_size);
+ zfree(z, data);
+}
- /* compute the size of the block that we actually allocated */
+#ifdef MACH_BSD
+zone_t
+kalloc_zone(
+ vm_size_t size)
+{
+ if (size < MAX_SIZE_ZDLUT)
+ return (get_zone_dlut(size));
+ if (size <= kalloc_max)
+ return (get_zone_search(size, k_zindex_start));
+ return (ZONE_NULL);
+}
+#endif
- allocsize = KALLOC_MINSIZE;
- zindex = first_k_zone;
- while (allocsize < old_size) {
- allocsize <<= 1;
- zindex++;
- }
+void
+kalloc_fake_zone_init(int zone_index)
+{
+ kalloc_fake_zone_index = zone_index;
+}
- /* if new size fits in old block, then return */
+void
+kalloc_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)
+{
+ *count = kalloc_large_inuse;
+ *cur_size = kalloc_large_total;
+ *max_size = kalloc_large_max;
- if (new_size <= allocsize) {
- return;
+ if (kalloc_large_inuse) {
+ *elem_size = kalloc_large_total / kalloc_large_inuse;
+ *alloc_size = kalloc_large_total / kalloc_large_inuse;
+ } else {
+ *elem_size = 0;
+ *alloc_size = 0;
}
+ *sum_size = kalloc_large_sum;
+ *collectable = 0;
+ *exhaustable = 0;
+ *caller_acct = 0;
+}
- /* if new size does not fit in zone, kmem_alloc it, else zalloc it */
- simple_unlock(lock);
- if (new_size >= kalloc_max_prerounded) {
- if (kmem_alloc(kalloc_map, &naddr, new_size) != KERN_SUCCESS) {
- panic("krealloc: kmem_alloc");
- simple_lock(lock);
- *addrp = 0;
- return;
- }
- kalloc_large_inuse++;
- kalloc_large_total += new_size;
+void
+OSMalloc_init(
+ void)
+{
+ queue_init(&OSMalloc_tag_list);
- if (kalloc_large_total > kalloc_large_max)
- kalloc_large_max = kalloc_large_total;
- } else {
- register int new_zindex;
+ OSMalloc_tag_lck_grp = lck_grp_alloc_init("OSMalloc_tag", LCK_GRP_ATTR_NULL);
+ lck_mtx_init(&OSMalloc_tag_lock, OSMalloc_tag_lck_grp, LCK_ATTR_NULL);
+}
- allocsize <<= 1;
- new_zindex = zindex + 1;
- while (allocsize < new_size) {
- allocsize <<= 1;
- new_zindex++;
- }
- naddr = zalloc(k_zone[new_zindex]);
- }
- simple_lock(lock);
+OSMallocTag
+OSMalloc_Tagalloc(
+ const char *str,
+ uint32_t flags)
+{
+ OSMallocTag OSMTag;
- /* copy existing data */
+ OSMTag = (OSMallocTag)kalloc(sizeof(*OSMTag));
- bcopy((const char *)*addrp, (char *)naddr, old_size);
+ bzero((void *)OSMTag, sizeof(*OSMTag));
- /* free old block, and return */
+ if (flags & OSMT_PAGEABLE)
+ OSMTag->OSMT_attr = OSMT_ATTR_PAGEABLE;
- zfree(k_zone[zindex], *addrp);
+ OSMTag->OSMT_refcnt = 1;
- /* set up new address */
+ strncpy(OSMTag->OSMT_name, str, OSMT_MAX_NAME);
- *addrp = naddr;
+ OSMalloc_tag_spin_lock();
+ enqueue_tail(&OSMalloc_tag_list, (queue_entry_t)OSMTag);
+ OSMalloc_tag_unlock();
+ OSMTag->OSMT_state = OSMT_VALID;
+ return(OSMTag);
}
-
-vm_offset_t
-kget(
- vm_size_t size)
+void
+OSMalloc_Tagref(
+ OSMallocTag tag)
{
- register int zindex;
- register vm_size_t allocsize;
+ if (!((tag->OSMT_state & OSMT_VALID_MASK) == OSMT_VALID))
+ panic("OSMalloc_Tagref():'%s' has bad state 0x%08X\n", tag->OSMT_name, tag->OSMT_state);
- /* size must not be too large for a zone */
+ (void)hw_atomic_add(&tag->OSMT_refcnt, 1);
+}
- if (size >= kalloc_max_prerounded) {
- /* This will never work, so we might as well panic */
- panic("kget");
+void
+OSMalloc_Tagrele(
+ OSMallocTag tag)
+{
+ if (!((tag->OSMT_state & OSMT_VALID_MASK) == OSMT_VALID))
+ panic("OSMalloc_Tagref():'%s' has bad state 0x%08X\n", tag->OSMT_name, tag->OSMT_state);
+
+ if (hw_atomic_sub(&tag->OSMT_refcnt, 1) == 0) {
+ if (hw_compare_and_store(OSMT_VALID|OSMT_RELEASED, OSMT_VALID|OSMT_RELEASED, &tag->OSMT_state)) {
+ OSMalloc_tag_spin_lock();
+ (void)remque((queue_entry_t)tag);
+ OSMalloc_tag_unlock();
+ kfree((void*)tag, sizeof(*tag));
+ } else
+ panic("OSMalloc_Tagrele():'%s' has refcnt 0\n", tag->OSMT_name);
}
+}
- /* compute the size of the block that we will actually allocate */
-
- allocsize = KALLOC_MINSIZE;
- zindex = first_k_zone;
- while (allocsize < size) {
- allocsize <<= 1;
- zindex++;
+void
+OSMalloc_Tagfree(
+ OSMallocTag tag)
+{
+ if (!hw_compare_and_store(OSMT_VALID, OSMT_VALID|OSMT_RELEASED, &tag->OSMT_state))
+ panic("OSMalloc_Tagfree():'%s' has bad state 0x%08X \n", tag->OSMT_name, tag->OSMT_state);
+
+ if (hw_atomic_sub(&tag->OSMT_refcnt, 1) == 0) {
+ OSMalloc_tag_spin_lock();
+ (void)remque((queue_entry_t)tag);
+ OSMalloc_tag_unlock();
+ kfree((void*)tag, sizeof(*tag));
}
-
- /* allocate from the appropriate zone */
-
- assert(allocsize < kalloc_max);
- return(zget(k_zone[zindex]));
}
-void
-kfree(
- vm_offset_t data,
- vm_size_t size)
+void *
+OSMalloc(
+ uint32_t size,
+ OSMallocTag tag)
{
- register int zindex;
- register vm_size_t freesize;
+ void *addr=NULL;
+ kern_return_t kr;
- /* if size was too large for a zone, then use kmem_free */
+ OSMalloc_Tagref(tag);
+ if ((tag->OSMT_attr & OSMT_PAGEABLE)
+ && (size & ~PAGE_MASK)) {
- if (size >= kalloc_max_prerounded) {
- kmem_free(kalloc_map, data, size);
+ if ((kr = kmem_alloc_pageable(kernel_map, (vm_offset_t *)&addr, size)) != KERN_SUCCESS)
+ addr = NULL;
+ } else
+ addr = kalloc((vm_size_t)size);
- kalloc_large_total -= size;
- kalloc_large_inuse--;
+ if (!addr)
+ OSMalloc_Tagrele(tag);
- return;
- }
+ return(addr);
+}
- /* compute the size of the block that we actually allocated from */
+void *
+OSMalloc_nowait(
+ uint32_t size,
+ OSMallocTag tag)
+{
+ void *addr=NULL;
- freesize = KALLOC_MINSIZE;
- zindex = first_k_zone;
- while (freesize < size) {
- freesize <<= 1;
- zindex++;
- }
+ if (tag->OSMT_attr & OSMT_PAGEABLE)
+ return(NULL);
- /* free to the appropriate zone */
+ OSMalloc_Tagref(tag);
+ /* XXX: use non-blocking kalloc for now */
+ addr = kalloc_noblock((vm_size_t)size);
+ if (addr == NULL)
+ OSMalloc_Tagrele(tag);
- assert(freesize < kalloc_max);
- zfree(k_zone[zindex], data);
+ return(addr);
}
-#ifdef MACH_BSD
-zone_t
-kalloc_zone(
- vm_size_t size)
+void *
+OSMalloc_noblock(
+ uint32_t size,
+ OSMallocTag tag)
{
- register int zindex = 0;
- register vm_size_t allocsize;
+ void *addr=NULL;
- /* compute the size of the block that we will actually allocate */
-
- allocsize = size;
- if (size <= kalloc_max) {
- allocsize = KALLOC_MINSIZE;
- zindex = first_k_zone;
- while (allocsize < size) {
- allocsize <<= 1;
- zindex++;
- }
- return (k_zone[zindex]);
- }
- return (ZONE_NULL);
-}
-#endif
+ if (tag->OSMT_attr & OSMT_PAGEABLE)
+ return(NULL);
+ OSMalloc_Tagref(tag);
+ addr = kalloc_noblock((vm_size_t)size);
+ if (addr == NULL)
+ OSMalloc_Tagrele(tag);
+ return(addr);
+}
-kalloc_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)
+void
+OSFree(
+ void *addr,
+ uint32_t size,
+ OSMallocTag tag)
{
- *count = kalloc_large_inuse;
- *cur_size = kalloc_large_total;
- *max_size = kalloc_large_max;
- *elem_size = kalloc_large_total / kalloc_large_inuse;
- *alloc_size = kalloc_large_total / kalloc_large_inuse;
- *collectable = 0;
- *exhaustable = 0;
-}
+ if ((tag->OSMT_attr & OSMT_PAGEABLE)
+ && (size & ~PAGE_MASK)) {
+ kmem_free(kernel_map, (vm_offset_t)addr, size);
+ } else
+ kfree((void *)addr, size);
+ OSMalloc_Tagrele(tag);
+}
projects / apple / xnu.git / blobdiff