The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/sys/malloc.h

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 1987, 1993
    3  *      The Regents of the University of California.
    4  * Copyright (c) 2005, 2009 Robert N. M. Watson
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 4. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)malloc.h    8.5 (Berkeley) 5/3/95
   32  * $FreeBSD: releng/8.0/sys/sys/malloc.h 191267 2009-04-19 11:20:57Z rwatson $
   33  */
   34 
   35 #ifndef _SYS_MALLOC_H_
   36 #define _SYS_MALLOC_H_
   37 
   38 #include <sys/param.h>
   39 #include <sys/queue.h>
   40 #include <sys/_lock.h>
   41 #include <sys/_mutex.h>
   42 
   43 #define MINALLOCSIZE    UMA_SMALLEST_UNIT
   44 
   45 /*
   46  * flags to malloc.
   47  */
   48 #define M_NOWAIT        0x0001          /* do not block */
   49 #define M_WAITOK        0x0002          /* ok to block */
   50 #define M_ZERO          0x0100          /* bzero the allocation */
   51 #define M_NOVM          0x0200          /* don't ask VM for pages */
   52 #define M_USE_RESERVE   0x0400          /* can alloc out of reserve memory */
   53 
   54 #define M_MAGIC         877983977       /* time when first defined :-) */
   55 
   56 /*
   57  * Two malloc type structures are present: malloc_type, which is used by a
   58  * type owner to declare the type, and malloc_type_internal, which holds
   59  * malloc-owned statistics and other ABI-sensitive fields, such as the set of
   60  * malloc statistics indexed by the compile-time MAXCPU constant.
   61  * Applications should avoid introducing dependence on the allocator private
   62  * data layout and size.
   63  *
   64  * The malloc_type ks_next field is protected by malloc_mtx.  Other fields in
   65  * malloc_type are static after initialization so unsynchronized.
   66  *
   67  * Statistics in malloc_type_stats are written only when holding a critical
   68  * section and running on the CPU associated with the index into the stat
   69  * array, but read lock-free resulting in possible (minor) races, which the
   70  * monitoring app should take into account.
   71  */
   72 struct malloc_type_stats {
   73         uint64_t        mts_memalloced; /* Bytes allocated on CPU. */
   74         uint64_t        mts_memfreed;   /* Bytes freed on CPU. */
   75         uint64_t        mts_numallocs;  /* Number of allocates on CPU. */
   76         uint64_t        mts_numfrees;   /* number of frees on CPU. */
   77         uint64_t        mts_size;       /* Bitmask of sizes allocated on CPU. */
   78         uint64_t        _mts_reserved1; /* Reserved field. */
   79         uint64_t        _mts_reserved2; /* Reserved field. */
   80         uint64_t        _mts_reserved3; /* Reserved field. */
   81 };
   82 
   83 /*
   84  * Index definitions for the mti_probes[] array.
   85  */
   86 #define DTMALLOC_PROBE_MALLOC           0
   87 #define DTMALLOC_PROBE_FREE             1
   88 #define DTMALLOC_PROBE_MAX              2
   89 
   90 struct malloc_type_internal {
   91         uint32_t        mti_probes[DTMALLOC_PROBE_MAX];
   92                                         /* DTrace probe ID array. */
   93         struct malloc_type_stats        mti_stats[MAXCPU];
   94 };
   95 
   96 /*
   97  * Public data structure describing a malloc type.  Private data is hung off
   98  * of ks_handle to avoid encoding internal malloc(9) data structures in
   99  * modules, which will statically allocate struct malloc_type.
  100  */
  101 struct malloc_type {
  102         struct malloc_type *ks_next;    /* Next in global chain. */
  103         u_long           ks_magic;      /* Detect programmer error. */
  104         const char      *ks_shortdesc;  /* Printable type name. */
  105         void            *ks_handle;     /* Priv. data, was lo_class. */
  106 };
  107 
  108 /*
  109  * Statistics structure headers for user space.  The kern.malloc sysctl
  110  * exposes a structure stream consisting of a stream header, then a series of
  111  * malloc type headers and statistics structures (quantity maxcpus).  For
  112  * convenience, the kernel will provide the current value of maxcpus at the
  113  * head of the stream.
  114  */
  115 #define MALLOC_TYPE_STREAM_VERSION      0x00000001
  116 struct malloc_type_stream_header {
  117         uint32_t        mtsh_version;   /* Stream format version. */
  118         uint32_t        mtsh_maxcpus;   /* Value of MAXCPU for stream. */
  119         uint32_t        mtsh_count;     /* Number of records. */
  120         uint32_t        _mtsh_pad;      /* Pad/reserved field. */
  121 };
  122 
  123 #define MALLOC_MAX_NAME 32
  124 struct malloc_type_header {
  125         char                            mth_name[MALLOC_MAX_NAME];
  126 };
  127 
  128 #ifdef _KERNEL
  129 #define MALLOC_DEFINE(type, shortdesc, longdesc)                        \
  130         struct malloc_type type[1] = {                                  \
  131                 { NULL, M_MAGIC, shortdesc, NULL }                      \
  132         };                                                              \
  133         SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_SECOND, malloc_init, \
  134             type);                                                      \
  135         SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY,             \
  136             malloc_uninit, type)
  137 
  138 #define MALLOC_DECLARE(type) \
  139         extern struct malloc_type type[1]
  140 
  141 MALLOC_DECLARE(M_CACHE);
  142 MALLOC_DECLARE(M_DEVBUF);
  143 MALLOC_DECLARE(M_TEMP);
  144 
  145 MALLOC_DECLARE(M_IP6OPT); /* for INET6 */
  146 MALLOC_DECLARE(M_IP6NDP); /* for INET6 */
  147 
  148 /*
  149  * Deprecated macro versions of not-quite-malloc() and free().
  150  */
  151 #define MALLOC(space, cast, size, type, flags) \
  152         ((space) = (cast)malloc((u_long)(size), (type), (flags)))
  153 #define FREE(addr, type) free((addr), (type))
  154 
  155 /*
  156  * XXX this should be declared in <sys/uio.h>, but that tends to fail
  157  * because <sys/uio.h> is included in a header before the source file
  158  * has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined.
  159  */
  160 MALLOC_DECLARE(M_IOV);
  161 
  162 extern struct mtx malloc_mtx;
  163 
  164 /*
  165  * Function type used when iterating over the list of malloc types.
  166  */
  167 typedef void malloc_type_list_func_t(struct malloc_type *, void *);
  168 
  169 void    contigfree(void *addr, unsigned long size, struct malloc_type *type);
  170 void    *contigmalloc(unsigned long size, struct malloc_type *type, int flags,
  171             vm_paddr_t low, vm_paddr_t high, unsigned long alignment,
  172             unsigned long boundary) __malloc_like;
  173 void    free(void *addr, struct malloc_type *type);
  174 void    *malloc(unsigned long size, struct malloc_type *type, int flags) __malloc_like;
  175 void    malloc_init(void *);
  176 int     malloc_last_fail(void);
  177 void    malloc_type_allocated(struct malloc_type *type, unsigned long size);
  178 void    malloc_type_freed(struct malloc_type *type, unsigned long size);
  179 void    malloc_type_list(malloc_type_list_func_t *, void *);
  180 void    malloc_uninit(void *);
  181 void    *realloc(void *addr, unsigned long size, struct malloc_type *type,
  182             int flags);
  183 void    *reallocf(void *addr, unsigned long size, struct malloc_type *type,
  184             int flags);
  185 
  186 struct malloc_type *malloc_desc2type(const char *desc);
  187 #endif /* _KERNEL */
  188 
  189 #endif /* !_SYS_MALLOC_H_ */

Cache object: 67ef57f517e8f025822f433f2e626f8f


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.