469 lines
13 KiB
C
469 lines
13 KiB
C
/**
|
|
* @file
|
|
* Dynamic pool memory manager
|
|
*
|
|
* lwIP has dedicated pools for many structures (netconn, protocol control blocks,
|
|
* packet buffers, ...). All these pools are managed here.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
|
|
* 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. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 is part of the lwIP TCP/IP stack.
|
|
*
|
|
* Author: Adam Dunkels <adam@sics.se>
|
|
*
|
|
*/
|
|
|
|
#include "lwip/opt.h"
|
|
|
|
#include "lwip/memp.h"
|
|
#include "lwip/pbuf.h"
|
|
#include "lwip/udp.h"
|
|
#include "lwip/raw.h"
|
|
#include "lwip/tcp_impl.h"
|
|
#include "lwip/igmp.h"
|
|
#include "lwip/api.h"
|
|
#include "lwip/api_msg.h"
|
|
#include "lwip/tcpip.h"
|
|
#include "lwip/sys.h"
|
|
#include "lwip/timers.h"
|
|
#include "lwip/stats.h"
|
|
#include "netif/etharp.h"
|
|
#include "lwip/ip_frag.h"
|
|
#include "lwip/snmp_structs.h"
|
|
#include "lwip/snmp_msg.h"
|
|
#include "lwip/dns.h"
|
|
#include "netif/ppp_oe.h"
|
|
|
|
#include <string.h>
|
|
|
|
#if !MEMP_MEM_MALLOC /* don't build if not configured for use in lwipopts.h */
|
|
|
|
struct memp {
|
|
struct memp *next;
|
|
#if MEMP_OVERFLOW_CHECK
|
|
const char *file;
|
|
int line;
|
|
#endif /* MEMP_OVERFLOW_CHECK */
|
|
};
|
|
|
|
#if MEMP_OVERFLOW_CHECK
|
|
/* if MEMP_OVERFLOW_CHECK is turned on, we reserve some bytes at the beginning
|
|
* and at the end of each element, initialize them as 0xcd and check
|
|
* them later. */
|
|
/* If MEMP_OVERFLOW_CHECK is >= 2, on every call to memp_malloc or memp_free,
|
|
* every single element in each pool is checked!
|
|
* This is VERY SLOW but also very helpful. */
|
|
/* MEMP_SANITY_REGION_BEFORE and MEMP_SANITY_REGION_AFTER can be overridden in
|
|
* lwipopts.h to change the amount reserved for checking. */
|
|
#ifndef MEMP_SANITY_REGION_BEFORE
|
|
#define MEMP_SANITY_REGION_BEFORE 16
|
|
#endif /* MEMP_SANITY_REGION_BEFORE*/
|
|
#if MEMP_SANITY_REGION_BEFORE > 0
|
|
#define MEMP_SANITY_REGION_BEFORE_ALIGNED LWIP_MEM_ALIGN_SIZE(MEMP_SANITY_REGION_BEFORE)
|
|
#else
|
|
#define MEMP_SANITY_REGION_BEFORE_ALIGNED 0
|
|
#endif /* MEMP_SANITY_REGION_BEFORE*/
|
|
#ifndef MEMP_SANITY_REGION_AFTER
|
|
#define MEMP_SANITY_REGION_AFTER 16
|
|
#endif /* MEMP_SANITY_REGION_AFTER*/
|
|
#if MEMP_SANITY_REGION_AFTER > 0
|
|
#define MEMP_SANITY_REGION_AFTER_ALIGNED LWIP_MEM_ALIGN_SIZE(MEMP_SANITY_REGION_AFTER)
|
|
#else
|
|
#define MEMP_SANITY_REGION_AFTER_ALIGNED 0
|
|
#endif /* MEMP_SANITY_REGION_AFTER*/
|
|
|
|
/* MEMP_SIZE: save space for struct memp and for sanity check */
|
|
#define MEMP_SIZE (LWIP_MEM_ALIGN_SIZE(sizeof(struct memp)) + MEMP_SANITY_REGION_BEFORE_ALIGNED)
|
|
#define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x) + MEMP_SANITY_REGION_AFTER_ALIGNED)
|
|
|
|
#else /* MEMP_OVERFLOW_CHECK */
|
|
|
|
/* No sanity checks
|
|
* We don't need to preserve the struct memp while not allocated, so we
|
|
* can save a little space and set MEMP_SIZE to 0.
|
|
*/
|
|
#define MEMP_SIZE 0
|
|
#define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x))
|
|
|
|
#endif /* MEMP_OVERFLOW_CHECK */
|
|
|
|
/** This array holds the first free element of each pool.
|
|
* Elements form a linked list. */
|
|
static struct memp *memp_tab[MEMP_MAX];
|
|
|
|
#else /* MEMP_MEM_MALLOC */
|
|
|
|
#define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x))
|
|
|
|
#endif /* MEMP_MEM_MALLOC */
|
|
|
|
/** This array holds the element sizes of each pool. */
|
|
#if !MEM_USE_POOLS && !MEMP_MEM_MALLOC
|
|
static
|
|
#endif
|
|
const u16_t memp_sizes[MEMP_MAX] = {
|
|
#define LWIP_MEMPOOL(name,num,size,desc) LWIP_MEM_ALIGN_SIZE(size),
|
|
#include "lwip/memp_std.h"
|
|
};
|
|
|
|
#if !MEMP_MEM_MALLOC /* don't build if not configured for use in lwipopts.h */
|
|
|
|
/** This array holds the number of elements in each pool. */
|
|
static const u16_t memp_num[MEMP_MAX] = {
|
|
#define LWIP_MEMPOOL(name,num,size,desc) (num),
|
|
#include "lwip/memp_std.h"
|
|
};
|
|
|
|
/** This array holds a textual description of each pool. */
|
|
#ifdef LWIP_DEBUG
|
|
static const char *memp_desc[MEMP_MAX] = {
|
|
#define LWIP_MEMPOOL(name,num,size,desc) (desc),
|
|
#include "lwip/memp_std.h"
|
|
};
|
|
#endif /* LWIP_DEBUG */
|
|
|
|
#if MEMP_SEPARATE_POOLS
|
|
|
|
/** This creates each memory pool. These are named memp_memory_XXX_base (where
|
|
* XXX is the name of the pool defined in memp_std.h).
|
|
* To relocate a pool, declare it as extern in cc.h. Example for GCC:
|
|
* extern u8_t __attribute__((section(".onchip_mem"))) memp_memory_UDP_PCB_base[];
|
|
*/
|
|
#define LWIP_MEMPOOL(name,num,size,desc) u8_t memp_memory_ ## name ## _base \
|
|
[((num) * (MEMP_SIZE + MEMP_ALIGN_SIZE(size)))];
|
|
#include "lwip/memp_std.h"
|
|
|
|
/** This array holds the base of each memory pool. */
|
|
static u8_t *const memp_bases[] = {
|
|
#define LWIP_MEMPOOL(name,num,size,desc) memp_memory_ ## name ## _base,
|
|
#include "lwip/memp_std.h"
|
|
};
|
|
|
|
#else /* MEMP_SEPARATE_POOLS */
|
|
|
|
/** This is the actual memory used by the pools (all pools in one big block). */
|
|
static u8_t memp_memory[MEM_ALIGNMENT - 1
|
|
#define LWIP_MEMPOOL(name,num,size,desc) + ( (num) * (MEMP_SIZE + MEMP_ALIGN_SIZE(size) ) )
|
|
#include "lwip/memp_std.h"
|
|
];
|
|
|
|
#endif /* MEMP_SEPARATE_POOLS */
|
|
|
|
#if MEMP_SANITY_CHECK
|
|
/**
|
|
* Check that memp-lists don't form a circle
|
|
*/
|
|
static int
|
|
memp_sanity(void)
|
|
{
|
|
s16_t i, c;
|
|
struct memp *m, *n;
|
|
|
|
for (i = 0; i < MEMP_MAX; i++) {
|
|
for (m = memp_tab[i]; m != NULL; m = m->next) {
|
|
c = 1;
|
|
for (n = memp_tab[i]; n != NULL; n = n->next) {
|
|
if (n == m && --c < 0) {
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
#endif /* MEMP_SANITY_CHECK*/
|
|
#if MEMP_OVERFLOW_CHECK
|
|
#if defined(LWIP_DEBUG) && MEMP_STATS
|
|
static const char * memp_overflow_names[] = {
|
|
#define LWIP_MEMPOOL(name,num,size,desc) "/"desc,
|
|
#include "lwip/memp_std.h"
|
|
};
|
|
#endif
|
|
|
|
/**
|
|
* Check if a memp element was victim of an overflow
|
|
* (e.g. the restricted area after it has been altered)
|
|
*
|
|
* @param p the memp element to check
|
|
* @param memp_type the pool p comes from
|
|
*/
|
|
static void
|
|
memp_overflow_check_element_overflow(struct memp *p, u16_t memp_type)
|
|
{
|
|
u16_t k;
|
|
u8_t *m;
|
|
#if MEMP_SANITY_REGION_AFTER_ALIGNED > 0
|
|
m = (u8_t*)p + MEMP_SIZE + memp_sizes[memp_type];
|
|
for (k = 0; k < MEMP_SANITY_REGION_AFTER_ALIGNED; k++) {
|
|
if (m[k] != 0xcd) {
|
|
char errstr[128] = "detected memp overflow in pool ";
|
|
char digit[] = "0";
|
|
if(memp_type >= 10) {
|
|
digit[0] = '0' + (memp_type/10);
|
|
strcat(errstr, digit);
|
|
}
|
|
digit[0] = '0' + (memp_type%10);
|
|
strcat(errstr, digit);
|
|
#if defined(LWIP_DEBUG) && MEMP_STATS
|
|
strcat(errstr, memp_overflow_names[memp_type]);
|
|
#endif
|
|
LWIP_ASSERT(errstr, 0);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Check if a memp element was victim of an underflow
|
|
* (e.g. the restricted area before it has been altered)
|
|
*
|
|
* @param p the memp element to check
|
|
* @param memp_type the pool p comes from
|
|
*/
|
|
static void
|
|
memp_overflow_check_element_underflow(struct memp *p, u16_t memp_type)
|
|
{
|
|
u16_t k;
|
|
u8_t *m;
|
|
#if MEMP_SANITY_REGION_BEFORE_ALIGNED > 0
|
|
m = (u8_t*)p + MEMP_SIZE - MEMP_SANITY_REGION_BEFORE_ALIGNED;
|
|
for (k = 0; k < MEMP_SANITY_REGION_BEFORE_ALIGNED; k++) {
|
|
if (m[k] != 0xcd) {
|
|
char errstr[128] = "detected memp underflow in pool ";
|
|
char digit[] = "0";
|
|
if(memp_type >= 10) {
|
|
digit[0] = '0' + (memp_type/10);
|
|
strcat(errstr, digit);
|
|
}
|
|
digit[0] = '0' + (memp_type%10);
|
|
strcat(errstr, digit);
|
|
#if defined(LWIP_DEBUG) && MEMP_STATS
|
|
strcat(errstr, memp_overflow_names[memp_type]);
|
|
#endif
|
|
LWIP_ASSERT(errstr, 0);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Do an overflow check for all elements in every pool.
|
|
*
|
|
* @see memp_overflow_check_element for a description of the check
|
|
*/
|
|
static void
|
|
memp_overflow_check_all(void)
|
|
{
|
|
u16_t i, j;
|
|
struct memp *p;
|
|
|
|
p = (struct memp *)LWIP_MEM_ALIGN(memp_memory);
|
|
for (i = 0; i < MEMP_MAX; ++i) {
|
|
p = p;
|
|
for (j = 0; j < memp_num[i]; ++j) {
|
|
memp_overflow_check_element_overflow(p, i);
|
|
p = (struct memp*)((u8_t*)p + MEMP_SIZE + memp_sizes[i] + MEMP_SANITY_REGION_AFTER_ALIGNED);
|
|
}
|
|
}
|
|
p = (struct memp *)LWIP_MEM_ALIGN(memp_memory);
|
|
for (i = 0; i < MEMP_MAX; ++i) {
|
|
p = p;
|
|
for (j = 0; j < memp_num[i]; ++j) {
|
|
memp_overflow_check_element_underflow(p, i);
|
|
p = (struct memp*)((u8_t*)p + MEMP_SIZE + memp_sizes[i] + MEMP_SANITY_REGION_AFTER_ALIGNED);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Initialize the restricted areas of all memp elements in every pool.
|
|
*/
|
|
static void
|
|
memp_overflow_init(void)
|
|
{
|
|
u16_t i, j;
|
|
struct memp *p;
|
|
u8_t *m;
|
|
|
|
p = (struct memp *)LWIP_MEM_ALIGN(memp_memory);
|
|
for (i = 0; i < MEMP_MAX; ++i) {
|
|
p = p;
|
|
for (j = 0; j < memp_num[i]; ++j) {
|
|
#if MEMP_SANITY_REGION_BEFORE_ALIGNED > 0
|
|
m = (u8_t*)p + MEMP_SIZE - MEMP_SANITY_REGION_BEFORE_ALIGNED;
|
|
memset(m, 0xcd, MEMP_SANITY_REGION_BEFORE_ALIGNED);
|
|
#endif
|
|
#if MEMP_SANITY_REGION_AFTER_ALIGNED > 0
|
|
m = (u8_t*)p + MEMP_SIZE + memp_sizes[i];
|
|
memset(m, 0xcd, MEMP_SANITY_REGION_AFTER_ALIGNED);
|
|
#endif
|
|
p = (struct memp*)((u8_t*)p + MEMP_SIZE + memp_sizes[i] + MEMP_SANITY_REGION_AFTER_ALIGNED);
|
|
}
|
|
}
|
|
}
|
|
#endif /* MEMP_OVERFLOW_CHECK */
|
|
|
|
/**
|
|
* Initialize this module.
|
|
*
|
|
* Carves out memp_memory into linked lists for each pool-type.
|
|
*/
|
|
void
|
|
memp_init(void)
|
|
{
|
|
struct memp *memp;
|
|
u16_t i, j;
|
|
|
|
for (i = 0; i < MEMP_MAX; ++i) {
|
|
MEMP_STATS_AVAIL(used, i, 0);
|
|
MEMP_STATS_AVAIL(max, i, 0);
|
|
MEMP_STATS_AVAIL(err, i, 0);
|
|
MEMP_STATS_AVAIL(avail, i, memp_num[i]);
|
|
}
|
|
|
|
#if !MEMP_SEPARATE_POOLS
|
|
memp = (struct memp *)LWIP_MEM_ALIGN(memp_memory);
|
|
#endif /* !MEMP_SEPARATE_POOLS */
|
|
/* for every pool: */
|
|
for (i = 0; i < MEMP_MAX; ++i) {
|
|
memp_tab[i] = NULL;
|
|
#if MEMP_SEPARATE_POOLS
|
|
memp = (struct memp*)memp_bases[i];
|
|
#endif /* MEMP_SEPARATE_POOLS */
|
|
/* create a linked list of memp elements */
|
|
for (j = 0; j < memp_num[i]; ++j) {
|
|
memp->next = memp_tab[i];
|
|
memp_tab[i] = memp;
|
|
memp = (struct memp *)(void *)((u8_t *)memp + MEMP_SIZE + memp_sizes[i]
|
|
#if MEMP_OVERFLOW_CHECK
|
|
+ MEMP_SANITY_REGION_AFTER_ALIGNED
|
|
#endif
|
|
);
|
|
}
|
|
}
|
|
#if MEMP_OVERFLOW_CHECK
|
|
memp_overflow_init();
|
|
/* check everything a first time to see if it worked */
|
|
memp_overflow_check_all();
|
|
#endif /* MEMP_OVERFLOW_CHECK */
|
|
}
|
|
|
|
/**
|
|
* Get an element from a specific pool.
|
|
*
|
|
* @param type the pool to get an element from
|
|
*
|
|
* the debug version has two more parameters:
|
|
* @param file file name calling this function
|
|
* @param line number of line where this function is called
|
|
*
|
|
* @return a pointer to the allocated memory or a NULL pointer on error
|
|
*/
|
|
void *
|
|
#if !MEMP_OVERFLOW_CHECK
|
|
memp_malloc(memp_t type)
|
|
#else
|
|
memp_malloc_fn(memp_t type, const char* file, const int line)
|
|
#endif
|
|
{
|
|
struct memp *memp;
|
|
SYS_ARCH_DECL_PROTECT(old_level);
|
|
|
|
LWIP_ERROR("memp_malloc: type < MEMP_MAX", (type < MEMP_MAX), return NULL;);
|
|
|
|
SYS_ARCH_PROTECT(old_level);
|
|
#if MEMP_OVERFLOW_CHECK >= 2
|
|
memp_overflow_check_all();
|
|
#endif /* MEMP_OVERFLOW_CHECK >= 2 */
|
|
|
|
memp = memp_tab[type];
|
|
|
|
if (memp != NULL) {
|
|
memp_tab[type] = memp->next;
|
|
#if MEMP_OVERFLOW_CHECK
|
|
memp->next = NULL;
|
|
memp->file = file;
|
|
memp->line = line;
|
|
#endif /* MEMP_OVERFLOW_CHECK */
|
|
MEMP_STATS_INC_USED(used, type);
|
|
LWIP_ASSERT("memp_malloc: memp properly aligned",
|
|
((mem_ptr_t)memp % MEM_ALIGNMENT) == 0);
|
|
memp = (struct memp*)(void *)((u8_t*)memp + MEMP_SIZE);
|
|
} else {
|
|
LWIP_DEBUGF(MEMP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("memp_malloc: out of memory in pool %s\n", memp_desc[type]));
|
|
MEMP_STATS_INC(err, type);
|
|
}
|
|
|
|
SYS_ARCH_UNPROTECT(old_level);
|
|
|
|
return memp;
|
|
}
|
|
|
|
/**
|
|
* Put an element back into its pool.
|
|
*
|
|
* @param type the pool where to put mem
|
|
* @param mem the memp element to free
|
|
*/
|
|
void
|
|
memp_free(memp_t type, void *mem)
|
|
{
|
|
struct memp *memp;
|
|
SYS_ARCH_DECL_PROTECT(old_level);
|
|
|
|
if (mem == NULL) {
|
|
return;
|
|
}
|
|
LWIP_ASSERT("memp_free: mem properly aligned",
|
|
((mem_ptr_t)mem % MEM_ALIGNMENT) == 0);
|
|
|
|
memp = (struct memp *)(void *)((u8_t*)mem - MEMP_SIZE);
|
|
|
|
SYS_ARCH_PROTECT(old_level);
|
|
#if MEMP_OVERFLOW_CHECK
|
|
#if MEMP_OVERFLOW_CHECK >= 2
|
|
memp_overflow_check_all();
|
|
#else
|
|
memp_overflow_check_element_overflow(memp, type);
|
|
memp_overflow_check_element_underflow(memp, type);
|
|
#endif /* MEMP_OVERFLOW_CHECK >= 2 */
|
|
#endif /* MEMP_OVERFLOW_CHECK */
|
|
|
|
MEMP_STATS_DEC(used, type);
|
|
|
|
memp->next = memp_tab[type];
|
|
memp_tab[type] = memp;
|
|
|
|
#if MEMP_SANITY_CHECK
|
|
LWIP_ASSERT("memp sanity", memp_sanity());
|
|
#endif /* MEMP_SANITY_CHECK */
|
|
|
|
SYS_ARCH_UNPROTECT(old_level);
|
|
}
|
|
|
|
#endif /* MEMP_MEM_MALLOC */
|