267 lines
9.9 KiB
C
267 lines
9.9 KiB
C
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/*-
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* Copyright (c) 1987, 1993
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* The Regents of the University of California.
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* Copyright (c) 2005 Robert N. M. Watson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/* This file has been renamed user_malloc.h for Userspace */
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#ifndef _USER_MALLOC_H_
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#define _USER_MALLOC_H_
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/*__Userspace__*/
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#include <stdlib.h>
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#include <sys/types.h>
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#if !defined (__Userspace_os_Windows)
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#include <strings.h>
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#include <stdint.h>
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#else
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#if (defined(_MSC_VER) && _MSC_VER >= 1600) || (defined(__MSVCRT_VERSION__) && __MSVCRT_VERSION__ >= 1400)
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#include <stdint.h>
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#elif defined(SCTP_STDINT_INCLUDE)
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#include SCTP_STDINT_INCLUDE
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#else
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#define uint32_t unsigned __int32
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#define uint64_t unsigned __int64
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#endif
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#include <winsock2.h>
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#endif
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#define MINALLOCSIZE UMA_SMALLEST_UNIT
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/*
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* flags to malloc.
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*/
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#define M_NOWAIT 0x0001 /* do not block */
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#define M_WAITOK 0x0002 /* ok to block */
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#define M_ZERO 0x0100 /* bzero the allocation */
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#define M_NOVM 0x0200 /* don't ask VM for pages */
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#define M_USE_RESERVE 0x0400 /* can alloc out of reserve memory */
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#define M_MAGIC 877983977 /* time when first defined :-) */
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/*
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* Two malloc type structures are present: malloc_type, which is used by a
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* type owner to declare the type, and malloc_type_internal, which holds
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* malloc-owned statistics and other ABI-sensitive fields, such as the set of
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* malloc statistics indexed by the compile-time MAXCPU constant.
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* Applications should avoid introducing dependence on the allocator private
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* data layout and size.
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*
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* The malloc_type ks_next field is protected by malloc_mtx. Other fields in
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* malloc_type are static after initialization so unsynchronized.
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*
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* Statistics in malloc_type_stats are written only when holding a critical
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* section and running on the CPU associated with the index into the stat
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* array, but read lock-free resulting in possible (minor) races, which the
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* monitoring app should take into account.
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*/
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struct malloc_type_stats {
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uint64_t mts_memalloced; /* Bytes allocated on CPU. */
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uint64_t mts_memfreed; /* Bytes freed on CPU. */
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uint64_t mts_numallocs; /* Number of allocates on CPU. */
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uint64_t mts_numfrees; /* number of frees on CPU. */
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uint64_t mts_size; /* Bitmask of sizes allocated on CPU. */
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uint64_t _mts_reserved1; /* Reserved field. */
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uint64_t _mts_reserved2; /* Reserved field. */
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uint64_t _mts_reserved3; /* Reserved field. */
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};
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#ifndef MAXCPU /* necessary on Linux */
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#define MAXCPU 4 /* arbitrary? */
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#endif
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struct malloc_type_internal {
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struct malloc_type_stats mti_stats[MAXCPU];
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};
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/*
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* ABI-compatible version of the old 'struct malloc_type', only all stats are
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* now malloc-managed in malloc-owned memory rather than in caller memory, so
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* as to avoid ABI issues. The ks_next pointer is reused as a pointer to the
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* internal data handle.
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*/
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struct malloc_type {
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struct malloc_type *ks_next; /* Next in global chain. */
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u_long _ks_memuse; /* No longer used. */
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u_long _ks_size; /* No longer used. */
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u_long _ks_inuse; /* No longer used. */
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uint64_t _ks_calls; /* No longer used. */
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u_long _ks_maxused; /* No longer used. */
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u_long ks_magic; /* Detect programmer error. */
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const char *ks_shortdesc; /* Printable type name. */
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/*
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* struct malloc_type was terminated with a struct mtx, which is no
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* longer required. For ABI reasons, continue to flesh out the full
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* size of the old structure, but reuse the _lo_class field for our
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* internal data handle.
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*/
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void *ks_handle; /* Priv. data, was lo_class. */
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const char *_lo_name;
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const char *_lo_type;
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u_int _lo_flags;
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void *_lo_list_next;
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struct witness *_lo_witness;
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uintptr_t _mtx_lock;
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u_int _mtx_recurse;
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};
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/*
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* Statistics structure headers for user space. The kern.malloc sysctl
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* exposes a structure stream consisting of a stream header, then a series of
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* malloc type headers and statistics structures (quantity maxcpus). For
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* convenience, the kernel will provide the current value of maxcpus at the
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* head of the stream.
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*/
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#define MALLOC_TYPE_STREAM_VERSION 0x00000001
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struct malloc_type_stream_header {
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uint32_t mtsh_version; /* Stream format version. */
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uint32_t mtsh_maxcpus; /* Value of MAXCPU for stream. */
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uint32_t mtsh_count; /* Number of records. */
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uint32_t _mtsh_pad; /* Pad/reserved field. */
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};
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#define MALLOC_MAX_NAME 32
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struct malloc_type_header {
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char mth_name[MALLOC_MAX_NAME];
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};
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/* __Userspace__
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Notice that at places it uses ifdef _KERNEL. That line cannot be
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removed because it causes conflicts with malloc definition in
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/usr/include/malloc.h, which essentially says that malloc.h has
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been overridden by stdlib.h. We will need to use names like
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user_malloc.h for isolating kernel interface headers. using
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original names like malloc.h in a user_include header can be
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confusing, All userspace header files are being placed in ./user_include
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Better still to remove from user_include.h all irrelevant code such
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as that in the block starting with #ifdef _KERNEL. I am only leaving
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it in for the time being to see what functionality is in this file
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that kernel uses.
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Start copy: Copied code for __Userspace__ */
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#define MALLOC_DEFINE(type, shortdesc, longdesc) \
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struct malloc_type type[1] = { \
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{ NULL, 0, 0, 0, 0, 0, M_MAGIC, shortdesc, NULL, NULL, \
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NULL, 0, NULL, NULL, 0, 0 } \
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}
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/* Removed "extern" in __Userspace__ code */
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/* If we need to use MALLOC_DECLARE before using MALLOC then
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we have to remove extern.
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In /usr/include/sys/malloc.h there is this definition:
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#define MALLOC_DECLARE(type) \
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extern struct malloc_type type[1]
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and loader is unable to find the extern malloc_type because
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it may be defined in one of kernel object files.
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It seems that MALLOC_DECLARE and MALLOC_DEFINE cannot be used at
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the same time for same "type" variable. Also, in Randall's architecture
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document, where it specifies O/S specific macros and functions, it says
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that the name in SCTP_MALLOC does not have to be used.
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*/
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#define MALLOC_DECLARE(type) \
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extern struct malloc_type type[1]
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#define FREE(addr, type) free((addr))
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/* changed definitions of MALLOC and FREE */
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/* Using memset if flag M_ZERO is specified. Todo: M_WAITOK and M_NOWAIT */
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#define MALLOC(space, cast, size, type, flags) \
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((space) = (cast)malloc((u_long)(size))); \
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do { \
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if (flags & M_ZERO) { \
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memset(space,0,size); \
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} \
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} while (0);
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/* End copy: Copied code for __Userspace__ */
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#if 0
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#ifdef _KERNEL
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#define MALLOC_DEFINE(type, shortdesc, longdesc) \
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struct malloc_type type[1] = { \
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{ NULL, 0, 0, 0, 0, 0, M_MAGIC, shortdesc, NULL, NULL, \
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NULL, 0, NULL, NULL, 0, 0 } \
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}; \
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SYSINIT(type##_init, SI_SUB_KMEM, SI_ORDER_SECOND, malloc_init, \
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type); \
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SYSUNINIT(type##_uninit, SI_SUB_KMEM, SI_ORDER_ANY, \
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malloc_uninit, type)
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#define MALLOC_DECLARE(type) \
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extern struct malloc_type type[1]
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MALLOC_DECLARE(M_CACHE);
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MALLOC_DECLARE(M_DEVBUF);
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MALLOC_DECLARE(M_TEMP);
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MALLOC_DECLARE(M_IP6OPT); /* for INET6 */
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MALLOC_DECLARE(M_IP6NDP); /* for INET6 */
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/*
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* Deprecated macro versions of not-quite-malloc() and free().
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*/
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#define MALLOC(space, cast, size, type, flags) \
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((space) = (cast)malloc((u_long)(size), (type), (flags)))
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#define FREE(addr, type) free((addr), (type))
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/*
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* XXX this should be declared in <sys/uio.h>, but that tends to fail
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* because <sys/uio.h> is included in a header before the source file
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* has a chance to include <sys/malloc.h> to get MALLOC_DECLARE() defined.
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*/
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MALLOC_DECLARE(M_IOV);
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extern struct mtx malloc_mtx;
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/* XXX struct malloc_type is unused for contig*(). */
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void contigfree(void *addr, unsigned long size, struct malloc_type *type);
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void *contigmalloc(unsigned long size, struct malloc_type *type, int flags,
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vm_paddr_t low, vm_paddr_t high, unsigned long alignment,
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unsigned long boundary);
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void free(void *addr, struct malloc_type *type);
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void *malloc(unsigned long size, struct malloc_type *type, int flags);
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void malloc_init(void *);
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int malloc_last_fail(void);
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void malloc_type_allocated(struct malloc_type *type, unsigned long size);
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void malloc_type_freed(struct malloc_type *type, unsigned long size);
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void malloc_uninit(void *);
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void *realloc(void *addr, unsigned long size, struct malloc_type *type,
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int flags);
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void *reallocf(void *addr, unsigned long size, struct malloc_type *type,
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int flags);
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#endif /* _KERNEL */
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#endif
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#endif /* !_SYS_MALLOC_H_ */
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