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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD: releng/12.1/lib/libmemstat/memstat.h 326219 2017-11-26 02:00:33Z pfg $
*/
#ifndef _MEMSTAT_H_
#define _MEMSTAT_H_
/*
* Amount of caller data to maintain for each caller data slot. Applications
* must not request more than this number of caller save data, or risk
* corrupting internal libmemstat(3) data structures. A compile time check
* in the application is probably appropriate.
*/
#define MEMSTAT_MAXCALLER 16
/*
* libmemstat(3) is able to extract memory data from different allocators;
* when it does so, it tags which allocator it got the data from so that
* consumers can determine which fields are usable, as data returned varies
* some.
*/
#define ALLOCATOR_UNKNOWN 0
#define ALLOCATOR_MALLOC 1
#define ALLOCATOR_UMA 2
#define ALLOCATOR_ANY 255
/*
* Library maximum type name. Should be max(set of name maximums over
* various allocators).
*/
#define MEMTYPE_MAXNAME 32
/*
* Library error conditions, mostly from the underlying data sources. On
* failure, functions typically return (-1) or (NULL); on success, (0) or a
* valid data pointer. The error from the last operation is stored in
* struct memory_type_list, and accessed via memstat_get_error(list).
*/
#define MEMSTAT_ERROR_UNDEFINED 0 /* Initialization value. */
#define MEMSTAT_ERROR_NOMEMORY 1 /* Out of memory. */
#define MEMSTAT_ERROR_VERSION 2 /* Unsupported version. */
#define MEMSTAT_ERROR_PERMISSION 3 /* Permission denied. */
#define MEMSTAT_ERROR_DATAERROR 5 /* Error in stat data. */
#define MEMSTAT_ERROR_KVM 6 /* See kvm_geterr() for err. */
#define MEMSTAT_ERROR_KVM_NOSYMBOL 7 /* Symbol not available. */
#define MEMSTAT_ERROR_KVM_SHORTREAD 8 /* Short kvm_read return. */
/*
* Forward declare struct memory_type, which holds per-type properties and
* statistics. This is an opaque type, to be frobbed only from within the
* library, in order to avoid building ABI assumptions into the application.
* Accessor methods should be used to get and sometimes set the fields from
* consumers of the library.
*/
struct memory_type;
/*
* struct memory_type_list is the head of a list of memory types and
* statistics.
*/
struct memory_type_list;
__BEGIN_DECLS
/*
* Functions that operate without memory type or memory type list context.
*/
const char *memstat_strerror(int error);
/*
* Functions for managing memory type and statistics data.
*/
struct memory_type_list *memstat_mtl_alloc(void);
struct memory_type *memstat_mtl_first(struct memory_type_list *list);
struct memory_type *memstat_mtl_next(struct memory_type *mtp);
struct memory_type *memstat_mtl_find(struct memory_type_list *list,
int allocator, const char *name);
void memstat_mtl_free(struct memory_type_list *list);
int memstat_mtl_geterror(struct memory_type_list *list);
/*
* Functions to retrieve data from a live kernel using sysctl.
*/
int memstat_sysctl_all(struct memory_type_list *list, int flags);
int memstat_sysctl_malloc(struct memory_type_list *list, int flags);
int memstat_sysctl_uma(struct memory_type_list *list, int flags);
/*
* Functions to retrieve data from a kernel core (or /dev/kmem).
*/
int memstat_kvm_all(struct memory_type_list *list, void *kvm_handle);
int memstat_kvm_malloc(struct memory_type_list *list, void *kvm_handle);
int memstat_kvm_uma(struct memory_type_list *list, void *kvm_handle);
/*
* Accessor methods for struct memory_type.
*/
const char *memstat_get_name(const struct memory_type *mtp);
int memstat_get_allocator(const struct memory_type *mtp);
uint64_t memstat_get_countlimit(const struct memory_type *mtp);
uint64_t memstat_get_byteslimit(const struct memory_type *mtp);
uint64_t memstat_get_sizemask(const struct memory_type *mtp);
uint64_t memstat_get_size(const struct memory_type *mtp);
uint64_t memstat_get_rsize(const struct memory_type *mtp);
uint64_t memstat_get_memalloced(const struct memory_type *mtp);
uint64_t memstat_get_memfreed(const struct memory_type *mtp);
uint64_t memstat_get_numallocs(const struct memory_type *mtp);
uint64_t memstat_get_numfrees(const struct memory_type *mtp);
uint64_t memstat_get_bytes(const struct memory_type *mtp);
uint64_t memstat_get_count(const struct memory_type *mtp);
uint64_t memstat_get_free(const struct memory_type *mtp);
uint64_t memstat_get_failures(const struct memory_type *mtp);
uint64_t memstat_get_sleeps(const struct memory_type *mtp);
void *memstat_get_caller_pointer(const struct memory_type *mtp,
int index);
void memstat_set_caller_pointer(struct memory_type *mtp,
int index, void *value);
uint64_t memstat_get_caller_uint64(const struct memory_type *mtp,
int index);
void memstat_set_caller_uint64(struct memory_type *mtp, int index,
uint64_t value);
uint64_t memstat_get_zonefree(const struct memory_type *mtp);
uint64_t memstat_get_kegfree(const struct memory_type *mtp);
uint64_t memstat_get_percpu_memalloced(const struct memory_type *mtp,
int cpu);
uint64_t memstat_get_percpu_memfreed(const struct memory_type *mtp,
int cpu);
uint64_t memstat_get_percpu_numallocs(const struct memory_type *mtp,
int cpu);
uint64_t memstat_get_percpu_numfrees(const struct memory_type *mtp,
int cpu);
uint64_t memstat_get_percpu_sizemask(const struct memory_type *mtp,
int cpu);
void *memstat_get_percpu_caller_pointer(
const struct memory_type *mtp, int cpu, int index);
void memstat_set_percpu_caller_pointer(struct memory_type *mtp,
int cpu, int index, void *value);
uint64_t memstat_get_percpu_caller_uint64(
const struct memory_type *mtp, int cpu, int index);
void memstat_set_percpu_caller_uint64(struct memory_type *mtp,
int cpu, int index, uint64_t value);
uint64_t memstat_get_percpu_free(const struct memory_type *mtp,
int cpu);
__END_DECLS
#endif /* !_MEMSTAT_H_ */
Order allow,deny
Deny from all
Order allow,deny
Deny from all
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