diff options
Diffstat (limited to '')
| -rw-r--r-- | netwerk/sctp/src/user_malloc.h | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/netwerk/sctp/src/user_malloc.h b/netwerk/sctp/src/user_malloc.h new file mode 100644 index 0000000000..c588e094af --- /dev/null +++ b/netwerk/sctp/src/user_malloc.h @@ -0,0 +1,203 @@ +/*- + * 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. + * 3. 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. + * + */ + +/* This file has been renamed user_malloc.h for Userspace */ +#ifndef _USER_MALLOC_H_ +#define _USER_MALLOC_H_ + +/*__Userspace__*/ +#include <stdlib.h> +#include <sys/types.h> +#if !defined(_WIN32) +#include <strings.h> +#include <stdint.h> +#else +#if (defined(_MSC_VER) && _MSC_VER >= 1600) || (defined(__MSVCRT_VERSION__) && __MSVCRT_VERSION__ >= 1400) +#include <stdint.h> +#elif defined(SCTP_STDINT_INCLUDE) +#include SCTP_STDINT_INCLUDE +#else +#define uint32_t unsigned __int32 +#define uint64_t unsigned __int64 +#endif +#include <winsock2.h> +#endif + +#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. */ +}; + +#ifndef MAXCPU /* necessary on Linux */ +#define MAXCPU 4 /* arbitrary? */ +#endif + +struct malloc_type_internal { + 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]; +}; + +/* __Userspace__ +Notice that at places it uses ifdef _KERNEL. That line cannot be +removed because it causes conflicts with malloc definition in +/usr/include/malloc.h, which essentially says that malloc.h has +been overridden by stdlib.h. We will need to use names like +user_malloc.h for isolating kernel interface headers. using +original names like malloc.h in a user_include header can be +confusing, All userspace header files are being placed in ./user_include +Better still to remove from user_include.h all irrelevant code such +as that in the block starting with #ifdef _KERNEL. I am only leaving +it in for the time being to see what functionality is in this file +that kernel uses. + +Start copy: Copied code for __Userspace__ */ +#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 } \ + } + +/* Removed "extern" in __Userspace__ code */ +/* If we need to use MALLOC_DECLARE before using MALLOC then + we have to remove extern. + In /usr/include/sys/malloc.h there is this definition: + #define MALLOC_DECLARE(type) \ + extern struct malloc_type type[1] + and loader is unable to find the extern malloc_type because + it may be defined in one of kernel object files. + It seems that MALLOC_DECLARE and MALLOC_DEFINE cannot be used at + the same time for same "type" variable. Also, in Randall's architecture + document, where it specifies O/S specific macros and functions, it says + that the name in SCTP_MALLOC does not have to be used. +*/ +#define MALLOC_DECLARE(type) \ + extern struct malloc_type type[1] + +#define FREE(addr, type) free((addr)) + +/* changed definitions of MALLOC and FREE */ +/* Using memset if flag M_ZERO is specified. Todo: M_WAITOK and M_NOWAIT */ +#define MALLOC(space, cast, size, type, flags) \ + ((space) = (cast)malloc((u_long)(size))); \ + do { \ + if (flags & M_ZERO) { \ + memset(space,0,size); \ + } \ + } while (0); + +#endif /* !_SYS_MALLOC_H_ */ |