/*- * Copyright (c) 1987, 1993 * The Regents of the University of California. * Copyright (c) 2005 Robert N. M. Watson * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)malloc.h 8.5 (Berkeley) 5/3/95 * $FreeBSD$ */ #ifndef _SYS_MALLOC_H_ #define _SYS_MALLOC_H_ #include #include #include #include #define MINALLOCSIZE UMA_SMALLEST_UNIT /* * flags to malloc. */ #define M_NOWAIT 0x0001 /* do not block */ #define M_WAITOK 0x0002 /* ok to block */ #define M_ZERO 0x0100 /* bzero the allocation */ #define M_NOVM 0x0200 /* don't ask VM for pages */ #define M_USE_RESERVE 0x0400 /* can alloc out of reserve memory */ #define M_MAGIC 877983977 /* time when first defined :-) */ /* * Two malloc type structures are present: malloc_type, which is used by a * type owner to declare the type, and malloc_type_internal, which holds * malloc-owned statistics and other ABI-sensitive fields, such as the set of * malloc statistics indexed by the compile-time MAXCPU constant. * Applications should avoid introducing dependence on the allocator private * data layout and size. * * The malloc_type ks_next field is protected by malloc_mtx. Other fields in * malloc_type are static after initialization so unsynchronized. * * Statistics in malloc_type_stats are written only when holding a critical * section and running on the CPU associated with the index into the stat * array, but read lock-free resulting in possible (minor) races, which the * monitoring app should take into account. */ struct malloc_type_stats { uint64_t mts_memalloced; /* Bytes allocated on CPU. */ uint64_t mts_memfreed; /* Bytes freed on CPU. */ uint64_t mts_numallocs; /* Number of allocates on CPU. */ uint64_t mts_numfrees; /* number of frees on CPU. */ uint64_t mts_size; /* Bitmask of sizes allocated on CPU. */ uint64_t _mts_reserved1; /* Reserved field. */ uint64_t _mts_reserved2; /* Reserved field. */ uint64_t _mts_reserved3; /* Reserved field. */ }; /* * Index definitions for the mti_probes[] array. */ #define DTMALLOC_PROBE_MALLOC 0 #define DTMALLOC_PROBE_FREE 1 #define DTMALLOC_PROBE_MAX 2 struct malloc_type_internal { uint32_t mti_probes[DTMALLOC_PROBE_MAX]; /* DTrace probe ID array. */ struct malloc_type_stats mti_stats[MAXCPU]; }; /* * ABI-compatible version of the old 'struct malloc_type', only all stats are * now malloc-managed in malloc-owned memory rather than in caller memory, so * as to avoid ABI issues. The ks_next pointer is reused as a pointer to the * internal data handle. */ struct malloc_type { struct malloc_type *ks_next; /* Next in global chain. */ u_long _ks_memuse; /* No longer used. */ u_long _ks_size; /* No longer used. */ u_long _ks_inuse; /* No longer used. */ uint64_t _ks_calls; /* No longer used. */ u_long _ks_maxused; /* No longer used. */ u_long ks_magic; /* Detect programmer error. */ const char *ks_shortdesc; /* Printable type name. */ /* * struct malloc_type was terminated with a struct mtx, which is no * longer required. For ABI reasons, continue to flesh out the full * size of the old structure, but reuse the _lo_class field for our * internal data handle. */ void *ks_handle; /* Priv. data, was lo_class. */ const char *_lo_name; const char *_lo_type; u_int _lo_flags; void *_lo_list_next; struct witness *_lo_witness; uintptr_t _mtx_lock; u_int _mtx_recurse; }; /* * Statistics structure headers for user space. The kern.malloc sysctl * exposes a structure stream consisting of a stream header, then a series of * malloc type headers and statistics structures (quantity maxcpus). For * convenience, the kernel will provide the current value of maxcpus at the * head of the stream. */ #define MALLOC_TYPE_STREAM_VERSION 0x00000001 struct malloc_type_stream_header { uint32_t mtsh_version; /* Stream format version. */ uint32_t mtsh_maxcpus; /* Value of MAXCPU for stream. */ uint32_t mtsh_count; /* Number of records. */ uint32_t _mtsh_pad; /* Pad/reserved field. */ }; #define MALLOC_MAX_NAME 32 struct malloc_type_header { char mth_name[MALLOC_MAX_NAME]; }; #ifdef _KERNEL #define MALLOC_DEFINE(type, shortdesc, longdesc) \ struct malloc_type type[1] = { \ { NULL, 0, 0, 0, 0, 0, M_MAGIC, shortdesc, NULL, NULL, \ NULL, 0, NULL, NULL, 0, 0 } \ }; \ SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_SECOND, malloc_init, \ type); \ SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, \ malloc_uninit, type) #define MALLOC_DECLARE(type) \ extern struct malloc_type type[1] MALLOC_DECLARE(M_CACHE); MALLOC_DECLARE(M_DEVBUF); MALLOC_DECLARE(M_TEMP); MALLOC_DECLARE(M_IP6OPT); /* for INET6 */ MALLOC_DECLARE(M_IP6NDP); /* for INET6 */ /* * Deprecated macro versions of not-quite-malloc() and free(). */ #define MALLOC(space, cast, size, type, flags) \ ((space) = (cast)malloc((u_long)(size), (type), (flags))) #define FREE(addr, type) free((addr), (type)) /* * XXX this should be declared in , but that tends to fail * because is included in a header before the source file * has a chance to include to get MALLOC_DECLARE() defined. */ MALLOC_DECLARE(M_IOV); extern struct mtx malloc_mtx; /* * Function type used when iterating over the list of malloc types. */ typedef void malloc_type_list_func_t(struct malloc_type *, void *); void contigfree(void *addr, unsigned long size, struct malloc_type *type); void *contigmalloc(unsigned long size, struct malloc_type *type, int flags, vm_paddr_t low, vm_paddr_t high, unsigned long alignment, unsigned long boundary); void free(void *addr, struct malloc_type *type); void *malloc(unsigned long size, struct malloc_type *type, int flags); void malloc_init(void *); int malloc_last_fail(void); void malloc_type_allocated(struct malloc_type *type, unsigned long size); void malloc_type_freed(struct malloc_type *type, unsigned long size); void malloc_type_list(malloc_type_list_func_t *, void *); void malloc_uninit(void *); void *realloc(void *addr, unsigned long size, struct malloc_type *type, int flags); void *reallocf(void *addr, unsigned long size, struct malloc_type *type, int flags); struct malloc_type *malloc_desc2type(const char *desc); #endif /* _KERNEL */ #endif /* !_SYS_MALLOC_H_ */