netwerk/sctp/src/user_malloc.h

   1 /*-
   2  * Copyright (c) 1987, 1993
   3  *      The Regents of the University of California.
   4  * Copyright (c) 2005 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  * 3. 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  */
  32
  33 /* This file has been renamed user_malloc.h for Userspace */
  34 #ifndef _USER_MALLOC_H_
  35 #define _USER_MALLOC_H_
  36
  37 /*__Userspace__*/
  38 #include <stdlib.h>
  39 #include <sys/types.h>
  40 #if !defined(_WIN32)
  41 #include <strings.h>
  42 #include <stdint.h>
  43 #else
  44 #if (defined(_MSC_VER) && _MSC_VER >= 1600) || (defined(__MSVCRT_VERSION__) && __MSVCRT_VERSION__ >= 1400)
  45 #include <stdint.h>
  46 #elif defined(SCTP_STDINT_INCLUDE)
  47 #include SCTP_STDINT_INCLUDE
  48 #else
  49 #define uint32_t unsigned __int32
  50 #define uint64_t unsigned __int64
  51 #endif
  52 #include <winsock2.h>
  53 #endif
  54
  55 #define MINALLOCSIZE    UMA_SMALLEST_UNIT
  56
  57 /*
  58  * flags to malloc.
  59  */
  60 #define M_NOWAIT        0x0001          /* do not block */
  61 #define M_WAITOK        0x0002          /* ok to block */
  62 #define M_ZERO          0x0100          /* bzero the allocation */
  63 #define M_NOVM          0x0200          /* don't ask VM for pages */
  64 #define M_USE_RESERVE   0x0400          /* can alloc out of reserve memory */
  65
  66 #define M_MAGIC         877983977       /* time when first defined :-) */
  67
  68 /*
  69  * Two malloc type structures are present: malloc_type, which is used by a
  70  * type owner to declare the type, and malloc_type_internal, which holds
  71  * malloc-owned statistics and other ABI-sensitive fields, such as the set of
  72  * malloc statistics indexed by the compile-time MAXCPU constant.
  73  * Applications should avoid introducing dependence on the allocator private
  74  * data layout and size.
  75  *
  76  * The malloc_type ks_next field is protected by malloc_mtx.  Other fields in
  77  * malloc_type are static after initialization so unsynchronized.
  78  *
  79  * Statistics in malloc_type_stats are written only when holding a critical
  80  * section and running on the CPU associated with the index into the stat
  81  * array, but read lock-free resulting in possible (minor) races, which the
  82  * monitoring app should take into account.
  83  */
  84 struct malloc_type_stats {
  85         uint64_t        mts_memalloced; /* Bytes allocated on CPU. */
  86         uint64_t        mts_memfreed;   /* Bytes freed on CPU. */
  87         uint64_t        mts_numallocs;  /* Number of allocates on CPU. */
  88         uint64_t        mts_numfrees;   /* number of frees on CPU. */
  89         uint64_t        mts_size;       /* Bitmask of sizes allocated on CPU. */
  90         uint64_t        _mts_reserved1; /* Reserved field. */
  91         uint64_t        _mts_reserved2; /* Reserved field. */
  92         uint64_t        _mts_reserved3; /* Reserved field. */
  93 };
  94
  95 #ifndef MAXCPU /* necessary on Linux */
  96 #define MAXCPU 4 /* arbitrary? */
  97 #endif
  98
  99 struct malloc_type_internal {
 100         struct malloc_type_stats        mti_stats[MAXCPU];
 101 };
 102
 103 /*
 104  * ABI-compatible version of the old 'struct malloc_type', only all stats are
 105  * now malloc-managed in malloc-owned memory rather than in caller memory, so
 106  * as to avoid ABI issues.  The ks_next pointer is reused as a pointer to the
 107  * internal data handle.
 108  */
 109 struct malloc_type {
 110         struct malloc_type *ks_next;    /* Next in global chain. */
 111         u_long           _ks_memuse;    /* No longer used. */
 112         u_long           _ks_size;      /* No longer used. */
 113         u_long           _ks_inuse;     /* No longer used. */
 114         uint64_t         _ks_calls;     /* No longer used. */
 115         u_long           _ks_maxused;   /* No longer used. */
 116         u_long           ks_magic;      /* Detect programmer error. */
 117         const char      *ks_shortdesc;  /* Printable type name. */
 118
 119         /*
 120          * struct malloc_type was terminated with a struct mtx, which is no
 121          * longer required.  For ABI reasons, continue to flesh out the full
 122          * size of the old structure, but reuse the _lo_class field for our
 123          * internal data handle.
 124          */
 125         void            *ks_handle;     /* Priv. data, was lo_class. */
 126         const char      *_lo_name;
 127         const char      *_lo_type;
 128         u_int            _lo_flags;
 129         void            *_lo_list_next;
 130         struct witness  *_lo_witness;
 131         uintptr_t        _mtx_lock;
 132         u_int            _mtx_recurse;
 133 };
 134
 135 /*
 136  * Statistics structure headers for user space.  The kern.malloc sysctl
 137  * exposes a structure stream consisting of a stream header, then a series of
 138  * malloc type headers and statistics structures (quantity maxcpus).  For
 139  * convenience, the kernel will provide the current value of maxcpus at the
 140  * head of the stream.
 141  */
 142 #define MALLOC_TYPE_STREAM_VERSION      0x00000001
 143 struct malloc_type_stream_header {
 144         uint32_t        mtsh_version;   /* Stream format version. */
 145         uint32_t        mtsh_maxcpus;   /* Value of MAXCPU for stream. */
 146         uint32_t        mtsh_count;     /* Number of records. */
 147         uint32_t        _mtsh_pad;      /* Pad/reserved field. */
 148 };
 149
 150 #define MALLOC_MAX_NAME 32
 151 struct malloc_type_header {
 152         char                            mth_name[MALLOC_MAX_NAME];
 153 };
 154
 155 /* __Userspace__
 156 Notice that at places it uses ifdef _KERNEL. That line cannot be
 157 removed because it causes conflicts with malloc definition in
 158 /usr/include/malloc.h, which essentially says that malloc.h has
 159 been overridden by stdlib.h. We will need to use names like
 160 user_malloc.h for isolating kernel interface headers. using
 161 original names like malloc.h in a user_include header can be
 162 confusing, All userspace header files are being placed in ./user_include
 163 Better still to remove from user_include.h all irrelevant code such
 164 as that in the block starting with #ifdef _KERNEL. I am only leaving
 165 it in for the time being to see what functionality is in this file
 166 that kernel uses.
 167
 168 Start copy: Copied code for __Userspace__ */
 169 #define MALLOC_DEFINE(type, shortdesc, longdesc)                        \
 170         struct malloc_type type[1] = {                                  \
 171                 { NULL, 0, 0, 0, 0, 0, M_MAGIC, shortdesc, NULL, NULL,  \
 172                     NULL, 0, NULL, NULL, 0, 0 }                         \
 173         }
 174
 175 /* Removed "extern" in __Userspace__ code */
 176 /* If we need to use MALLOC_DECLARE before using MALLOC then
 177    we have to remove extern.
 178      In /usr/include/sys/malloc.h there is this definition:
 179      #define    MALLOC_DECLARE(type) \
 180         extern struct malloc_type type[1]
 181      and loader is unable to find the extern malloc_type because
 182      it may be defined in one of kernel object files.
 183      It seems that MALLOC_DECLARE and MALLOC_DEFINE cannot be used at
 184      the same time for same "type" variable. Also, in Randall's architecture
 185      document, where it specifies O/S specific macros and functions, it says
 186      that the name in SCTP_MALLOC does not have to be used.
 187 */
 188 #define MALLOC_DECLARE(type) \
 189         extern struct malloc_type type[1]
 190
 191 #define FREE(addr, type) free((addr))
 192
 193 /* changed definitions of MALLOC and FREE */
 194 /* Using memset if flag M_ZERO is specified. Todo: M_WAITOK and M_NOWAIT */
 195 #define MALLOC(space, cast, size, type, flags)                          \
 196     ((space) = (cast)malloc((u_long)(size)));                           \
 197     do {                                                                \
 198         if (flags & M_ZERO) {                                            \
 199           memset(space,0,size);                                         \
 200         }                                                               \
 201     } while (0);
 202
 203 #endif /* !_SYS_MALLOC_H_ */