#include <kern/thread_call.h>
#include <kern/btlog.h>
+#if KASAN
+#include <sys/queue.h>
+#include <san/kasan.h>
+#endif
+
#if CONFIG_GZALLOC
typedef struct gzalloc_data {
uint32_t gzfc_index;
/* boolean_t */ alignment_required :1,
/* boolean_t */ zone_logging :1, /* Enable zone logging for this zone. */
/* boolean_t */ zone_replenishing :1,
- /* future */ _reserved :15;
+ /* boolean_t */ kasan_quarantine :1,
+ /* boolean_t */ tags :1,
+ /* boolean_t */ tags_inline :1,
+ /* future */ tag_zone_index :6,
+ /* boolean_t */ zone_valid :1,
+ /* future */ _reserved :5;
int index; /* index into zone_info arrays for this zone */
const char *zone_name; /* a name for the zone */
gzalloc_data_t gz;
#endif /* CONFIG_GZALLOC */
+#if KASAN_ZALLOC
+ vm_size_t kasan_redzone;
+#endif
+
btlog_t *zlog_btlog; /* zone logging structure to hold stacks and element references to those stacks. */
};
uint64_t free __attribute__((aligned(8))); /* free counter */
} zinfo_usage_store_t;
-extern void zone_gc(void);
-extern void consider_zone_gc(void);
+/*
+ * For sysctl kern.zones_collectable_bytes used by memory_maintenance to check if a
+ * userspace reboot is needed. The only other way to query for this information
+ * is via mach_memory_info() which is unavailable on release kernels.
+ */
+extern uint64_t get_zones_collectable_bytes(void);
+
+/*
+ * zone_gc also checks if the zone_map is getting close to full and triggers jetsams if needed, provided
+ * consider_jetsams is set to TRUE. To avoid deadlocks, we only pass a value of TRUE from within the
+ * vm_pageout_garbage_collect thread.
+ */
+extern void zone_gc(boolean_t consider_jetsams);
+extern void consider_zone_gc(boolean_t consider_jetsams);
+extern void drop_free_elements(zone_t z);
+
+/* Debug logging for zone-map-exhaustion jetsams. */
+extern void get_zone_map_size(uint64_t *current_size, uint64_t *capacity);
+extern void get_largest_zone_info(char *zone_name, size_t zone_name_len, uint64_t *zone_size);
/* Bootstrap zone module (create zone zone) */
extern void zone_bootstrap(void);
extern unsigned int num_zones;
extern struct zone zone_array[];
+/* zindex and page_count must pack into 16 bits
+ * update tools/lldbmacros/memory.py:GetRealMetadata
+ * when these values change */
+
+#define ZINDEX_BITS (10U)
+#define PAGECOUNT_BITS (16U - ZINDEX_BITS)
+#define MULTIPAGE_METADATA_MAGIC ((1UL << ZINDEX_BITS) - 1)
+#define ZONE_CHUNK_MAXPAGES ((1UL << PAGECOUNT_BITS) - 1)
+
+/*
+ * The max # of elements in a chunk should fit into zone_page_metadata.free_count (uint16_t).
+ * Update this if the type of free_count changes.
+ */
+#define ZONE_CHUNK_MAXELEMENTS (UINT16_MAX)
+
#endif /* MACH_KERNEL_PRIVATE */
__BEGIN_DECLS
#define Z_NOCALLOUT 7 /* Don't asynchronously replenish the zone via callouts */
#define Z_ALIGNMENT_REQUIRED 8
#define Z_GZALLOC_EXEMPT 9 /* Not tracked in guard allocation mode */
-
-
+#define Z_KASAN_QUARANTINE 10 /* Allow zone elements to be quarantined on free */
+#ifdef XNU_KERNEL_PRIVATE
+#define Z_TAGS_ENABLED 11 /* Store tags */
+#endif /* XNU_KERNEL_PRIVATE */
#ifdef XNU_KERNEL_PRIVATE
extern void * zalloc_nopagewait(
zone_t zone);
-/* Non-blocking version of zalloc */
-extern void * zalloc_noblock(
- zone_t zone);
-
/* selective version of zalloc */
extern void * zalloc_canblock(
zone_t zone,
boolean_t canblock);
+/* selective version of zalloc */
+extern void * zalloc_canblock_tag(
+ zone_t zone,
+ boolean_t canblock,
+ vm_size_t reqsize,
+ vm_tag_t tag);
+
/* Get from zone free list */
extern void * zget(
zone_t zone);
#endif /* CONFIG_ZLEAKS */
+#ifndef VM_MAX_TAG_ZONES
+#error MAX_TAG_ZONES
+#endif
+
+#if VM_MAX_TAG_ZONES
+
+extern boolean_t zone_tagging_on;
+extern uint32_t zone_index_from_tag_index(uint32_t tag_zone_index, vm_size_t * elem_size);
+
+#endif /* VM_MAX_TAG_ZONES */
+
/* These functions used for leak detection both in zalloc.c and mbuf.c */
extern uintptr_t hash_mix(uintptr_t);
extern uint32_t hashbacktrace(uintptr_t *, uint32_t, uint32_t);
#define lock_zone(zone) \
MACRO_BEGIN \
- lck_mtx_lock_spin(&(zone)->lock); \
+ lck_mtx_lock_spin_always(&(zone)->lock); \
MACRO_END
#define unlock_zone(zone) \
void gzalloc_zone_init(zone_t);
void gzalloc_configure(void);
void gzalloc_reconfigure(zone_t);
+void gzalloc_empty_free_cache(zone_t);
boolean_t gzalloc_enabled(void);
vm_offset_t gzalloc_alloc(zone_t, boolean_t);
void zlog_btlog_lock(__unused void *);
void zlog_btlog_unlock(__unused void *);
+#ifdef MACH_KERNEL_PRIVATE
+#define MAX_ZONE_NAME 32 /* max length of a zone name we can take from the boot-args */
+int track_this_zone(const char *zonename, const char *logname);
+#endif
+
+#if DEBUG || DEVELOPMENT
+extern boolean_t run_zone_test(void);
+extern vm_size_t zone_element_info(void *addr, vm_tag_t * ptag);
+#endif /* DEBUG || DEVELOPMENT */
+
#endif /* XNU_KERNEL_PRIVATE */
/* Allocate from zone */
extern void * zalloc(
zone_t zone);
+/* Non-blocking version of zalloc */
+extern void * zalloc_noblock(
+ zone_t zone);
+
/* Free zone element */
extern void zfree(
zone_t zone,
unsigned int item,
boolean_t value);
+/* Destroy the zone */
+extern void zdestroy(
+ zone_t zone);
__END_DECLS
projects / apple / xnu.git / blobdiff