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freebsd-dev/contrib/bind9/lib/isc/mem.c
Erwin Lansing cfd4d2c42e Update to 9.8.4-P1. 
Security Fixes

   Prevents named from aborting with a require assertion failure
   on servers with DNS64 enabled.  These crashes might occur as a
   result of  specific queries that are received.

New Features

*  Elliptic Curve Digital Signature Algorithm keys and signatures in
   DNSSEC are now supported per RFC 6605. [RT #21918]

Feature Changes

*  Improves OpenSSL error logging [RT #29932]

*  nslookup now returns a nonzero exit code when it is unable to get
   an answer.  [RT #29492]

Other critical bug fixes are included.

Approved by:	delphij (mentor)
MFC after:	3 days
Security:	CVE-2012-5688
Sponsored by:	DK Hostmaster A/S
2012-12-07 12:39:58 +00:00

2482 lines
59 KiB
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/*
* Copyright (C) 2004-2010, 2012 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1997-2003 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id$ */
/*! \file */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <limits.h>
#include <isc/magic.h>
#include <isc/mem.h>
#include <isc/msgs.h>
#include <isc/once.h>
#include <isc/ondestroy.h>
#include <isc/string.h>
#include <isc/mutex.h>
#include <isc/print.h>
#include <isc/util.h>
#include <isc/xml.h>
#define MCTXLOCK(m, l) if (((m)->flags & ISC_MEMFLAG_NOLOCK) == 0) LOCK(l)
#define MCTXUNLOCK(m, l) if (((m)->flags & ISC_MEMFLAG_NOLOCK) == 0) UNLOCK(l)
#ifndef ISC_MEM_DEBUGGING
#define ISC_MEM_DEBUGGING 0
#endif
LIBISC_EXTERNAL_DATA unsigned int isc_mem_debugging = ISC_MEM_DEBUGGING;
/*
* Constants.
*/
#define DEF_MAX_SIZE 1100
#define DEF_MEM_TARGET 4096
#define ALIGNMENT_SIZE 8U /*%< must be a power of 2 */
#define NUM_BASIC_BLOCKS 64 /*%< must be > 1 */
#define TABLE_INCREMENT 1024
#define DEBUGLIST_COUNT 1024
/*
* Types.
*/
typedef struct isc__mem isc__mem_t;
typedef struct isc__mempool isc__mempool_t;
#if ISC_MEM_TRACKLINES
typedef struct debuglink debuglink_t;
struct debuglink {
ISC_LINK(debuglink_t) link;
const void *ptr[DEBUGLIST_COUNT];
unsigned int size[DEBUGLIST_COUNT];
const char *file[DEBUGLIST_COUNT];
unsigned int line[DEBUGLIST_COUNT];
unsigned int count;
};
#define FLARG_PASS , file, line
#define FLARG , const char *file, unsigned int line
#else
#define FLARG_PASS
#define FLARG
#endif
typedef struct element element;
struct element {
element * next;
};
typedef struct {
/*!
* This structure must be ALIGNMENT_SIZE bytes.
*/
union {
size_t size;
isc__mem_t *ctx;
char bytes[ALIGNMENT_SIZE];
} u;
} size_info;
struct stats {
unsigned long gets;
unsigned long totalgets;
unsigned long blocks;
unsigned long freefrags;
};
#define MEM_MAGIC ISC_MAGIC('M', 'e', 'm', 'C')
#define VALID_CONTEXT(c) ISC_MAGIC_VALID(c, MEM_MAGIC)
#if ISC_MEM_TRACKLINES
typedef ISC_LIST(debuglink_t) debuglist_t;
#endif
/* List of all active memory contexts. */
static ISC_LIST(isc__mem_t) contexts;
static isc_once_t once = ISC_ONCE_INIT;
static isc_mutex_t lock;
/*%
* Total size of lost memory due to a bug of external library.
* Locked by the global lock.
*/
static isc_uint64_t totallost;
struct isc__mem {
isc_mem_t common;
isc_ondestroy_t ondestroy;
unsigned int flags;
isc_mutex_t lock;
isc_memalloc_t memalloc;
isc_memfree_t memfree;
void * arg;
size_t max_size;
isc_boolean_t checkfree;
struct stats * stats;
unsigned int references;
char name[16];
void * tag;
size_t quota;
size_t total;
size_t inuse;
size_t maxinuse;
size_t hi_water;
size_t lo_water;
isc_boolean_t hi_called;
isc_boolean_t is_overmem;
isc_mem_water_t water;
void * water_arg;
ISC_LIST(isc__mempool_t) pools;
unsigned int poolcnt;
/* ISC_MEMFLAG_INTERNAL */
size_t mem_target;
element ** freelists;
element * basic_blocks;
unsigned char ** basic_table;
unsigned int basic_table_count;
unsigned int basic_table_size;
unsigned char * lowest;
unsigned char * highest;
#if ISC_MEM_TRACKLINES
debuglist_t * debuglist;
unsigned int debuglistcnt;
#endif
unsigned int memalloc_failures;
ISC_LINK(isc__mem_t) link;
};
#define MEMPOOL_MAGIC ISC_MAGIC('M', 'E', 'M', 'p')
#define VALID_MEMPOOL(c) ISC_MAGIC_VALID(c, MEMPOOL_MAGIC)
struct isc__mempool {
/* always unlocked */
isc_mempool_t common; /*%< common header of mempool's */
isc_mutex_t *lock; /*%< optional lock */
isc__mem_t *mctx; /*%< our memory context */
/*%< locked via the memory context's lock */
ISC_LINK(isc__mempool_t) link; /*%< next pool in this mem context */
/*%< optionally locked from here down */
element *items; /*%< low water item list */
size_t size; /*%< size of each item on this pool */
unsigned int maxalloc; /*%< max number of items allowed */
unsigned int allocated; /*%< # of items currently given out */
unsigned int freecount; /*%< # of items on reserved list */
unsigned int freemax; /*%< # of items allowed on free list */
unsigned int fillcount; /*%< # of items to fetch on each fill */
/*%< Stats only. */
unsigned int gets; /*%< # of requests to this pool */
/*%< Debugging only. */
#if ISC_MEMPOOL_NAMES
char name[16]; /*%< printed name in stats reports */
#endif
};
/*
* Private Inline-able.
*/
#if ! ISC_MEM_TRACKLINES
#define ADD_TRACE(a, b, c, d, e)
#define DELETE_TRACE(a, b, c, d, e)
#else
#define ADD_TRACE(a, b, c, d, e) \
do { \
if ((isc_mem_debugging & (ISC_MEM_DEBUGTRACE | \
ISC_MEM_DEBUGRECORD)) != 0 && \
b != NULL) \
add_trace_entry(a, b, c, d, e); \
} while (0)
#define DELETE_TRACE(a, b, c, d, e) delete_trace_entry(a, b, c, d, e)
static void
print_active(isc__mem_t *ctx, FILE *out);
/*%
* The following can be either static or public, depending on build environment.
*/
#ifdef BIND9
#define ISC_MEMFUNC_SCOPE
#else
#define ISC_MEMFUNC_SCOPE static
#endif
ISC_MEMFUNC_SCOPE isc_result_t
isc__mem_createx(size_t init_max_size, size_t target_size,
isc_memalloc_t memalloc, isc_memfree_t memfree, void *arg,
isc_mem_t **ctxp);
ISC_MEMFUNC_SCOPE isc_result_t
isc__mem_createx2(size_t init_max_size, size_t target_size,
isc_memalloc_t memalloc, isc_memfree_t memfree, void *arg,
isc_mem_t **ctxp, unsigned int flags);
ISC_MEMFUNC_SCOPE isc_result_t
isc__mem_create(size_t init_max_size, size_t target_size, isc_mem_t **ctxp);
ISC_MEMFUNC_SCOPE isc_result_t
isc__mem_create2(size_t init_max_size, size_t target_size,
isc_mem_t **ctxp, unsigned int flags);
ISC_MEMFUNC_SCOPE void
isc__mem_attach(isc_mem_t *source, isc_mem_t **targetp);
ISC_MEMFUNC_SCOPE void
isc__mem_detach(isc_mem_t **ctxp);
ISC_MEMFUNC_SCOPE void
isc___mem_putanddetach(isc_mem_t **ctxp, void *ptr, size_t size FLARG);
ISC_MEMFUNC_SCOPE void
isc__mem_destroy(isc_mem_t **ctxp);
ISC_MEMFUNC_SCOPE isc_result_t
isc__mem_ondestroy(isc_mem_t *ctx, isc_task_t *task, isc_event_t **event);
ISC_MEMFUNC_SCOPE void *
isc___mem_get(isc_mem_t *ctx, size_t size FLARG);
ISC_MEMFUNC_SCOPE void
isc___mem_put(isc_mem_t *ctx, void *ptr, size_t size FLARG);
ISC_MEMFUNC_SCOPE void
isc__mem_stats(isc_mem_t *ctx, FILE *out);
ISC_MEMFUNC_SCOPE void *
isc___mem_allocate(isc_mem_t *ctx, size_t size FLARG);
ISC_MEMFUNC_SCOPE void *
isc___mem_reallocate(isc_mem_t *ctx, void *ptr, size_t size FLARG);
ISC_MEMFUNC_SCOPE void
isc___mem_free(isc_mem_t *ctx, void *ptr FLARG);
ISC_MEMFUNC_SCOPE char *
isc___mem_strdup(isc_mem_t *mctx, const char *s FLARG);
ISC_MEMFUNC_SCOPE void
isc__mem_setdestroycheck(isc_mem_t *ctx, isc_boolean_t flag);
ISC_MEMFUNC_SCOPE void
isc__mem_setquota(isc_mem_t *ctx, size_t quota);
ISC_MEMFUNC_SCOPE size_t
isc__mem_getquota(isc_mem_t *ctx);
ISC_MEMFUNC_SCOPE size_t
isc__mem_inuse(isc_mem_t *ctx);
ISC_MEMFUNC_SCOPE isc_boolean_t
isc__mem_isovermem(isc_mem_t *ctx);
ISC_MEMFUNC_SCOPE void
isc__mem_setwater(isc_mem_t *ctx, isc_mem_water_t water, void *water_arg,
size_t hiwater, size_t lowater);
ISC_MEMFUNC_SCOPE void
isc__mem_waterack(isc_mem_t *ctx0, int flag);
ISC_MEMFUNC_SCOPE void
isc__mem_setname(isc_mem_t *ctx, const char *name, void *tag);
ISC_MEMFUNC_SCOPE const char *
isc__mem_getname(isc_mem_t *ctx);
ISC_MEMFUNC_SCOPE void *
isc__mem_gettag(isc_mem_t *ctx);
ISC_MEMFUNC_SCOPE isc_result_t
isc__mempool_create(isc_mem_t *mctx, size_t size, isc_mempool_t **mpctxp);
ISC_MEMFUNC_SCOPE void
isc__mempool_setname(isc_mempool_t *mpctx, const char *name);
ISC_MEMFUNC_SCOPE void
isc__mempool_destroy(isc_mempool_t **mpctxp);
ISC_MEMFUNC_SCOPE void
isc__mempool_associatelock(isc_mempool_t *mpctx, isc_mutex_t *lock);
ISC_MEMFUNC_SCOPE void *
isc___mempool_get(isc_mempool_t *mpctx FLARG);
ISC_MEMFUNC_SCOPE void
isc___mempool_put(isc_mempool_t *mpctx, void *mem FLARG);
ISC_MEMFUNC_SCOPE void
isc__mempool_setfreemax(isc_mempool_t *mpctx, unsigned int limit);
ISC_MEMFUNC_SCOPE unsigned int
isc__mempool_getfreemax(isc_mempool_t *mpctx);
ISC_MEMFUNC_SCOPE unsigned int
isc__mempool_getfreecount(isc_mempool_t *mpctx);
ISC_MEMFUNC_SCOPE void
isc__mempool_setmaxalloc(isc_mempool_t *mpctx, unsigned int limit);
ISC_MEMFUNC_SCOPE unsigned int
isc__mempool_getmaxalloc(isc_mempool_t *mpctx);
ISC_MEMFUNC_SCOPE unsigned int
isc__mempool_getallocated(isc_mempool_t *mpctx);
ISC_MEMFUNC_SCOPE void
isc__mempool_setfillcount(isc_mempool_t *mpctx, unsigned int limit);
ISC_MEMFUNC_SCOPE unsigned int
isc__mempool_getfillcount(isc_mempool_t *mpctx);
#ifdef BIND9
ISC_MEMFUNC_SCOPE void
isc__mem_printactive(isc_mem_t *ctx0, FILE *file);
ISC_MEMFUNC_SCOPE void
isc__mem_printallactive(FILE *file);
ISC_MEMFUNC_SCOPE void
isc__mem_checkdestroyed(FILE *file);
ISC_MEMFUNC_SCOPE unsigned int
isc__mem_references(isc_mem_t *ctx0);
#endif
static struct isc__memmethods {
isc_memmethods_t methods;
/*%
* The following are defined just for avoiding unused static functions.
*/
#ifndef BIND9
void *createx, *create, *create2, *ondestroy, *stats,
*setquota, *getquota, *setname, *getname, *gettag;
#endif
} memmethods = {
{
isc__mem_attach,
isc__mem_detach,
isc__mem_destroy,
isc___mem_get,
isc___mem_put,
isc___mem_putanddetach,
isc___mem_allocate,
isc___mem_reallocate,
isc___mem_strdup,
isc___mem_free,
isc__mem_setdestroycheck,
isc__mem_setwater,
isc__mem_waterack,
isc__mem_inuse,
isc__mem_isovermem,
isc__mempool_create
}
#ifndef BIND9
,
(void *)isc__mem_createx, (void *)isc__mem_create,
(void *)isc__mem_create2, (void *)isc__mem_ondestroy,
(void *)isc__mem_stats, (void *)isc__mem_setquota,
(void *)isc__mem_getquota, (void *)isc__mem_setname,
(void *)isc__mem_getname, (void *)isc__mem_gettag
#endif
};
static struct isc__mempoolmethods {
isc_mempoolmethods_t methods;
/*%
* The following are defined just for avoiding unused static functions.
*/
#ifndef BIND9
void *getfreemax, *getfreecount, *getmaxalloc, *getfillcount;
#endif
} mempoolmethods = {
{
isc__mempool_destroy,
isc___mempool_get,
isc___mempool_put,
isc__mempool_getallocated,
isc__mempool_setmaxalloc,
isc__mempool_setfreemax,
isc__mempool_setname,
isc__mempool_associatelock,
isc__mempool_setfillcount
}
#ifndef BIND9
,
(void *)isc__mempool_getfreemax, (void *)isc__mempool_getfreecount,
(void *)isc__mempool_getmaxalloc, (void *)isc__mempool_getfillcount
#endif
};
/*!
* mctx must be locked.
*/
static inline void
add_trace_entry(isc__mem_t *mctx, const void *ptr, unsigned int size
FLARG)
{
debuglink_t *dl;
unsigned int i;
unsigned int mysize = size;
if ((isc_mem_debugging & ISC_MEM_DEBUGTRACE) != 0)
fprintf(stderr, isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_ADDTRACE,
"add %p size %u "
"file %s line %u mctx %p\n"),
ptr, size, file, line, mctx);
if (mctx->debuglist == NULL)
return;
if (mysize > mctx->max_size)
mysize = mctx->max_size;
dl = ISC_LIST_HEAD(mctx->debuglist[mysize]);
while (dl != NULL) {
if (dl->count == DEBUGLIST_COUNT)
goto next;
for (i = 0; i < DEBUGLIST_COUNT; i++) {
if (dl->ptr[i] == NULL) {
dl->ptr[i] = ptr;
dl->size[i] = size;
dl->file[i] = file;
dl->line[i] = line;
dl->count++;
return;
}
}
next:
dl = ISC_LIST_NEXT(dl, link);
}
dl = malloc(sizeof(debuglink_t));
INSIST(dl != NULL);
ISC_LINK_INIT(dl, link);
for (i = 1; i < DEBUGLIST_COUNT; i++) {
dl->ptr[i] = NULL;
dl->size[i] = 0;
dl->file[i] = NULL;
dl->line[i] = 0;
}
dl->ptr[0] = ptr;
dl->size[0] = size;
dl->file[0] = file;
dl->line[0] = line;
dl->count = 1;
ISC_LIST_PREPEND(mctx->debuglist[mysize], dl, link);
mctx->debuglistcnt++;
}
static inline void
delete_trace_entry(isc__mem_t *mctx, const void *ptr, unsigned int size,
const char *file, unsigned int line)
{
debuglink_t *dl;
unsigned int i;
if ((isc_mem_debugging & ISC_MEM_DEBUGTRACE) != 0)
fprintf(stderr, isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_DELTRACE,
"del %p size %u "
"file %s line %u mctx %p\n"),
ptr, size, file, line, mctx);
if (mctx->debuglist == NULL)
return;
if (size > mctx->max_size)
size = mctx->max_size;
dl = ISC_LIST_HEAD(mctx->debuglist[size]);
while (dl != NULL) {
for (i = 0; i < DEBUGLIST_COUNT; i++) {
if (dl->ptr[i] == ptr) {
dl->ptr[i] = NULL;
dl->size[i] = 0;
dl->file[i] = NULL;
dl->line[i] = 0;
INSIST(dl->count > 0);
dl->count--;
if (dl->count == 0) {
ISC_LIST_UNLINK(mctx->debuglist[size],
dl, link);
free(dl);
}
return;
}
}
dl = ISC_LIST_NEXT(dl, link);
}
/*
* If we get here, we didn't find the item on the list. We're
* screwed.
*/
INSIST(dl != NULL);
}
#endif /* ISC_MEM_TRACKLINES */
static inline size_t
rmsize(size_t size) {
/*
* round down to ALIGNMENT_SIZE
*/
return (size & (~(ALIGNMENT_SIZE - 1)));
}
static inline size_t
quantize(size_t size) {
/*!
* Round up the result in order to get a size big
* enough to satisfy the request and be aligned on ALIGNMENT_SIZE
* byte boundaries.
*/
if (size == 0U)
return (ALIGNMENT_SIZE);
return ((size + ALIGNMENT_SIZE - 1) & (~(ALIGNMENT_SIZE - 1)));
}
static inline isc_boolean_t
more_basic_blocks(isc__mem_t *ctx) {
void *new;
unsigned char *curr, *next;
unsigned char *first, *last;
unsigned char **table;
unsigned int table_size;
size_t increment;
int i;
/* Require: we hold the context lock. */
/*
* Did we hit the quota for this context?
*/
increment = NUM_BASIC_BLOCKS * ctx->mem_target;
if (ctx->quota != 0U && ctx->total + increment > ctx->quota)
return (ISC_FALSE);
INSIST(ctx->basic_table_count <= ctx->basic_table_size);
if (ctx->basic_table_count == ctx->basic_table_size) {
table_size = ctx->basic_table_size + TABLE_INCREMENT;
table = (ctx->memalloc)(ctx->arg,
table_size * sizeof(unsigned char *));
if (table == NULL) {
ctx->memalloc_failures++;
return (ISC_FALSE);
}
if (ctx->basic_table_size != 0) {
memcpy(table, ctx->basic_table,
ctx->basic_table_size *
sizeof(unsigned char *));
(ctx->memfree)(ctx->arg, ctx->basic_table);
}
ctx->basic_table = table;
ctx->basic_table_size = table_size;
}
new = (ctx->memalloc)(ctx->arg, NUM_BASIC_BLOCKS * ctx->mem_target);
if (new == NULL) {
ctx->memalloc_failures++;
return (ISC_FALSE);
}
ctx->total += increment;
ctx->basic_table[ctx->basic_table_count] = new;
ctx->basic_table_count++;
curr = new;
next = curr + ctx->mem_target;
for (i = 0; i < (NUM_BASIC_BLOCKS - 1); i++) {
((element *)curr)->next = (element *)next;
curr = next;
next += ctx->mem_target;
}
/*
* curr is now pointing at the last block in the
* array.
*/
((element *)curr)->next = NULL;
first = new;
last = first + NUM_BASIC_BLOCKS * ctx->mem_target - 1;
if (first < ctx->lowest || ctx->lowest == NULL)
ctx->lowest = first;
if (last > ctx->highest)
ctx->highest = last;
ctx->basic_blocks = new;
return (ISC_TRUE);
}
static inline isc_boolean_t
more_frags(isc__mem_t *ctx, size_t new_size) {
int i, frags;
size_t total_size;
void *new;
unsigned char *curr, *next;
/*!
* Try to get more fragments by chopping up a basic block.
*/
if (ctx->basic_blocks == NULL) {
if (!more_basic_blocks(ctx)) {
/*
* We can't get more memory from the OS, or we've
* hit the quota for this context.
*/
/*
* XXXRTH "At quota" notification here.
*/
return (ISC_FALSE);
}
}
total_size = ctx->mem_target;
new = ctx->basic_blocks;
ctx->basic_blocks = ctx->basic_blocks->next;
frags = total_size / new_size;
ctx->stats[new_size].blocks++;
ctx->stats[new_size].freefrags += frags;
/*
* Set up a linked-list of blocks of size
* "new_size".
*/
curr = new;
next = curr + new_size;
total_size -= new_size;
for (i = 0; i < (frags - 1); i++) {
((element *)curr)->next = (element *)next;
curr = next;
next += new_size;
total_size -= new_size;
}
/*
* Add the remaining fragment of the basic block to a free list.
*/
total_size = rmsize(total_size);
if (total_size > 0U) {
((element *)next)->next = ctx->freelists[total_size];
ctx->freelists[total_size] = (element *)next;
ctx->stats[total_size].freefrags++;
}
/*
* curr is now pointing at the last block in the
* array.
*/
((element *)curr)->next = NULL;
ctx->freelists[new_size] = new;
return (ISC_TRUE);
}
static inline void *
mem_getunlocked(isc__mem_t *ctx, size_t size) {
size_t new_size = quantize(size);
void *ret;
if (size >= ctx->max_size || new_size >= ctx->max_size) {
/*
* memget() was called on something beyond our upper limit.
*/
if (ctx->quota != 0U && ctx->total + size > ctx->quota) {
ret = NULL;
goto done;
}
ret = (ctx->memalloc)(ctx->arg, size);
if (ret == NULL) {
ctx->memalloc_failures++;
goto done;
}
ctx->total += size;
ctx->inuse += size;
ctx->stats[ctx->max_size].gets++;
ctx->stats[ctx->max_size].totalgets++;
/*
* If we don't set new_size to size, then the
* ISC_MEM_FILL code might write over bytes we
* don't own.
*/
new_size = size;
goto done;
}
/*
* If there are no blocks in the free list for this size, get a chunk
* of memory and then break it up into "new_size"-sized blocks, adding
* them to the free list.
*/
if (ctx->freelists[new_size] == NULL && !more_frags(ctx, new_size))
return (NULL);
/*
* The free list uses the "rounded-up" size "new_size".
*/
ret = ctx->freelists[new_size];
ctx->freelists[new_size] = ctx->freelists[new_size]->next;
/*
* The stats[] uses the _actual_ "size" requested by the
* caller, with the caveat (in the code above) that "size" >= the
* max. size (max_size) ends up getting recorded as a call to
* max_size.
*/
ctx->stats[size].gets++;
ctx->stats[size].totalgets++;
ctx->stats[new_size].freefrags--;
ctx->inuse += new_size;
done:
#if ISC_MEM_FILL
if (ret != NULL)
memset(ret, 0xbe, new_size); /* Mnemonic for "beef". */
#endif
return (ret);
}
#if ISC_MEM_FILL && ISC_MEM_CHECKOVERRUN
static inline void
check_overrun(void *mem, size_t size, size_t new_size) {
unsigned char *cp;
cp = (unsigned char *)mem;
cp += size;
while (size < new_size) {
INSIST(*cp == 0xbe);
cp++;
size++;
}
}
#endif
static inline void
mem_putunlocked(isc__mem_t *ctx, void *mem, size_t size) {
size_t new_size = quantize(size);
if (size == ctx->max_size || new_size >= ctx->max_size) {
/*
* memput() called on something beyond our upper limit.
*/
#if ISC_MEM_FILL
memset(mem, 0xde, size); /* Mnemonic for "dead". */
#endif
(ctx->memfree)(ctx->arg, mem);
INSIST(ctx->stats[ctx->max_size].gets != 0U);
ctx->stats[ctx->max_size].gets--;
INSIST(size <= ctx->total);
ctx->inuse -= size;
ctx->total -= size;
return;
}
#if ISC_MEM_FILL
#if ISC_MEM_CHECKOVERRUN
check_overrun(mem, size, new_size);
#endif
memset(mem, 0xde, new_size); /* Mnemonic for "dead". */
#endif
/*
* The free list uses the "rounded-up" size "new_size".
*/
((element *)mem)->next = ctx->freelists[new_size];
ctx->freelists[new_size] = (element *)mem;
/*
* The stats[] uses the _actual_ "size" requested by the
* caller, with the caveat (in the code above) that "size" >= the
* max. size (max_size) ends up getting recorded as a call to
* max_size.
*/
INSIST(ctx->stats[size].gets != 0U);
ctx->stats[size].gets--;
ctx->stats[new_size].freefrags++;
ctx->inuse -= new_size;
}
/*!
* Perform a malloc, doing memory filling and overrun detection as necessary.
*/
static inline void *
mem_get(isc__mem_t *ctx, size_t size) {
char *ret;
#if ISC_MEM_CHECKOVERRUN
size += 1;
#endif
ret = (ctx->memalloc)(ctx->arg, size);
if (ret == NULL)
ctx->memalloc_failures++;
#if ISC_MEM_FILL
if (ret != NULL)
memset(ret, 0xbe, size); /* Mnemonic for "beef". */
#else
# if ISC_MEM_CHECKOVERRUN
if (ret != NULL)
ret[size-1] = 0xbe;
# endif
#endif
return (ret);
}
/*!
* Perform a free, doing memory filling and overrun detection as necessary.
*/
static inline void
mem_put(isc__mem_t *ctx, void *mem, size_t size) {
#if ISC_MEM_CHECKOVERRUN
INSIST(((unsigned char *)mem)[size] == 0xbe);
#endif
#if ISC_MEM_FILL
memset(mem, 0xde, size); /* Mnemonic for "dead". */
#else
UNUSED(size);
#endif
(ctx->memfree)(ctx->arg, mem);
}
/*!
* Update internal counters after a memory get.
*/
static inline void
mem_getstats(isc__mem_t *ctx, size_t size) {
ctx->total += size;
ctx->inuse += size;
if (size > ctx->max_size) {
ctx->stats[ctx->max_size].gets++;
ctx->stats[ctx->max_size].totalgets++;
} else {
ctx->stats[size].gets++;
ctx->stats[size].totalgets++;
}
}
/*!
* Update internal counters after a memory put.
*/
static inline void
mem_putstats(isc__mem_t *ctx, void *ptr, size_t size) {
UNUSED(ptr);
INSIST(ctx->inuse >= size);
ctx->inuse -= size;
if (size > ctx->max_size) {
INSIST(ctx->stats[ctx->max_size].gets > 0U);
ctx->stats[ctx->max_size].gets--;
} else {
INSIST(ctx->stats[size].gets > 0U);
ctx->stats[size].gets--;
}
}
/*
* Private.
*/
static void *
default_memalloc(void *arg, size_t size) {
UNUSED(arg);
if (size == 0U)
size = 1;
return (malloc(size));
}
static void
default_memfree(void *arg, void *ptr) {
UNUSED(arg);
free(ptr);
}
static void
initialize_action(void) {
RUNTIME_CHECK(isc_mutex_init(&lock) == ISC_R_SUCCESS);
ISC_LIST_INIT(contexts);
totallost = 0;
}
/*
* Public.
*/
ISC_MEMFUNC_SCOPE isc_result_t
isc__mem_createx(size_t init_max_size, size_t target_size,
isc_memalloc_t memalloc, isc_memfree_t memfree, void *arg,
isc_mem_t **ctxp)
{
return (isc__mem_createx2(init_max_size, target_size, memalloc, memfree,
arg, ctxp, ISC_MEMFLAG_DEFAULT));
}
ISC_MEMFUNC_SCOPE isc_result_t
isc__mem_createx2(size_t init_max_size, size_t target_size,
isc_memalloc_t memalloc, isc_memfree_t memfree, void *arg,
isc_mem_t **ctxp, unsigned int flags)
{
isc__mem_t *ctx;
isc_result_t result;
REQUIRE(ctxp != NULL && *ctxp == NULL);
REQUIRE(memalloc != NULL);
REQUIRE(memfree != NULL);
INSIST((ALIGNMENT_SIZE & (ALIGNMENT_SIZE - 1)) == 0);
RUNTIME_CHECK(isc_once_do(&once, initialize_action) == ISC_R_SUCCESS);
ctx = (memalloc)(arg, sizeof(*ctx));
if (ctx == NULL)
return (ISC_R_NOMEMORY);
if ((flags & ISC_MEMFLAG_NOLOCK) == 0) {
result = isc_mutex_init(&ctx->lock);
if (result != ISC_R_SUCCESS) {
(memfree)(arg, ctx);
return (result);
}
}
if (init_max_size == 0U)
ctx->max_size = DEF_MAX_SIZE;
else
ctx->max_size = init_max_size;
ctx->flags = flags;
ctx->references = 1;
memset(ctx->name, 0, sizeof(ctx->name));
ctx->tag = NULL;
ctx->quota = 0;
ctx->total = 0;
ctx->inuse = 0;
ctx->maxinuse = 0;
ctx->hi_water = 0;
ctx->lo_water = 0;
ctx->hi_called = ISC_FALSE;
ctx->is_overmem = ISC_FALSE;
ctx->water = NULL;
ctx->water_arg = NULL;
ctx->common.impmagic = MEM_MAGIC;
ctx->common.magic = ISCAPI_MCTX_MAGIC;
ctx->common.methods = (isc_memmethods_t *)&memmethods;
isc_ondestroy_init(&ctx->ondestroy);
ctx->memalloc = memalloc;
ctx->memfree = memfree;
ctx->arg = arg;
ctx->stats = NULL;
ctx->checkfree = ISC_TRUE;
#if ISC_MEM_TRACKLINES
ctx->debuglist = NULL;
ctx->debuglistcnt = 0;
#endif
ISC_LIST_INIT(ctx->pools);
ctx->poolcnt = 0;
ctx->freelists = NULL;
ctx->basic_blocks = NULL;
ctx->basic_table = NULL;
ctx->basic_table_count = 0;
ctx->basic_table_size = 0;
ctx->lowest = NULL;
ctx->highest = NULL;
ctx->stats = (memalloc)(arg,
(ctx->max_size+1) * sizeof(struct stats));
if (ctx->stats == NULL) {
result = ISC_R_NOMEMORY;
goto error;
}
memset(ctx->stats, 0, (ctx->max_size + 1) * sizeof(struct stats));
if ((flags & ISC_MEMFLAG_INTERNAL) != 0) {
if (target_size == 0U)
ctx->mem_target = DEF_MEM_TARGET;
else
ctx->mem_target = target_size;
ctx->freelists = (memalloc)(arg, ctx->max_size *
sizeof(element *));
if (ctx->freelists == NULL) {
result = ISC_R_NOMEMORY;
goto error;
}
memset(ctx->freelists, 0,
ctx->max_size * sizeof(element *));
}
#if ISC_MEM_TRACKLINES
if ((isc_mem_debugging & ISC_MEM_DEBUGRECORD) != 0) {
unsigned int i;
ctx->debuglist = (memalloc)(arg,
(ctx->max_size+1) * sizeof(debuglist_t));
if (ctx->debuglist == NULL) {
result = ISC_R_NOMEMORY;
goto error;
}
for (i = 0; i <= ctx->max_size; i++)
ISC_LIST_INIT(ctx->debuglist[i]);
}
#endif
ctx->memalloc_failures = 0;
LOCK(&lock);
ISC_LIST_INITANDAPPEND(contexts, ctx, link);
UNLOCK(&lock);
*ctxp = (isc_mem_t *)ctx;
return (ISC_R_SUCCESS);
error:
if (ctx != NULL) {
if (ctx->stats != NULL)
(memfree)(arg, ctx->stats);
if (ctx->freelists != NULL)
(memfree)(arg, ctx->freelists);
#if ISC_MEM_TRACKLINES
if (ctx->debuglist != NULL)
(ctx->memfree)(ctx->arg, ctx->debuglist);
#endif /* ISC_MEM_TRACKLINES */
if ((ctx->flags & ISC_MEMFLAG_NOLOCK) == 0)
DESTROYLOCK(&ctx->lock);
(memfree)(arg, ctx);
}
return (result);
}
ISC_MEMFUNC_SCOPE isc_result_t
isc__mem_create(size_t init_max_size, size_t target_size, isc_mem_t **ctxp) {
return (isc__mem_createx2(init_max_size, target_size,
default_memalloc, default_memfree, NULL,
ctxp, ISC_MEMFLAG_DEFAULT));
}
ISC_MEMFUNC_SCOPE isc_result_t
isc__mem_create2(size_t init_max_size, size_t target_size,
isc_mem_t **ctxp, unsigned int flags)
{
return (isc__mem_createx2(init_max_size, target_size,
default_memalloc, default_memfree, NULL,
ctxp, flags));
}
static void
destroy(isc__mem_t *ctx) {
unsigned int i;
isc_ondestroy_t ondest;
LOCK(&lock);
ISC_LIST_UNLINK(contexts, ctx, link);
totallost += ctx->inuse;
UNLOCK(&lock);
ctx->common.impmagic = 0;
ctx->common.magic = 0;
INSIST(ISC_LIST_EMPTY(ctx->pools));
#if ISC_MEM_TRACKLINES
if (ctx->debuglist != NULL) {
if (ctx->checkfree) {
for (i = 0; i <= ctx->max_size; i++) {
if (!ISC_LIST_EMPTY(ctx->debuglist[i]))
print_active(ctx, stderr);
INSIST(ISC_LIST_EMPTY(ctx->debuglist[i]));
}
} else {
debuglink_t *dl;
for (i = 0; i <= ctx->max_size; i++)
for (dl = ISC_LIST_HEAD(ctx->debuglist[i]);
dl != NULL;
dl = ISC_LIST_HEAD(ctx->debuglist[i])) {
ISC_LIST_UNLINK(ctx->debuglist[i],
dl, link);
free(dl);
}
}
(ctx->memfree)(ctx->arg, ctx->debuglist);
}
#endif
INSIST(ctx->references == 0);
if (ctx->checkfree) {
for (i = 0; i <= ctx->max_size; i++) {
#if ISC_MEM_TRACKLINES
if (ctx->stats[i].gets != 0U)
print_active(ctx, stderr);
#endif
INSIST(ctx->stats[i].gets == 0U);
}
}
(ctx->memfree)(ctx->arg, ctx->stats);
if ((ctx->flags & ISC_MEMFLAG_INTERNAL) != 0) {
for (i = 0; i < ctx->basic_table_count; i++)
(ctx->memfree)(ctx->arg, ctx->basic_table[i]);
(ctx->memfree)(ctx->arg, ctx->freelists);
if (ctx->basic_table != NULL)
(ctx->memfree)(ctx->arg, ctx->basic_table);
}
ondest = ctx->ondestroy;
if ((ctx->flags & ISC_MEMFLAG_NOLOCK) == 0)
DESTROYLOCK(&ctx->lock);
(ctx->memfree)(ctx->arg, ctx);
isc_ondestroy_notify(&ondest, ctx);
}
ISC_MEMFUNC_SCOPE void
isc__mem_attach(isc_mem_t *source0, isc_mem_t **targetp) {
isc__mem_t *source = (isc__mem_t *)source0;
REQUIRE(VALID_CONTEXT(source));
REQUIRE(targetp != NULL && *targetp == NULL);
MCTXLOCK(source, &source->lock);
source->references++;
MCTXUNLOCK(source, &source->lock);
*targetp = (isc_mem_t *)source;
}
ISC_MEMFUNC_SCOPE void
isc__mem_detach(isc_mem_t **ctxp) {
isc__mem_t *ctx;
isc_boolean_t want_destroy = ISC_FALSE;
REQUIRE(ctxp != NULL);
ctx = (isc__mem_t *)*ctxp;
REQUIRE(VALID_CONTEXT(ctx));
MCTXLOCK(ctx, &ctx->lock);
INSIST(ctx->references > 0);
ctx->references--;
if (ctx->references == 0)
want_destroy = ISC_TRUE;
MCTXUNLOCK(ctx, &ctx->lock);
if (want_destroy)
destroy(ctx);
*ctxp = NULL;
}
/*
* isc_mem_putanddetach() is the equivalent of:
*
* mctx = NULL;
* isc_mem_attach(ptr->mctx, &mctx);
* isc_mem_detach(&ptr->mctx);
* isc_mem_put(mctx, ptr, sizeof(*ptr);
* isc_mem_detach(&mctx);
*/
ISC_MEMFUNC_SCOPE void
isc___mem_putanddetach(isc_mem_t **ctxp, void *ptr, size_t size FLARG) {
isc__mem_t *ctx;
isc_boolean_t want_destroy = ISC_FALSE;
size_info *si;
size_t oldsize;
REQUIRE(ctxp != NULL);
ctx = (isc__mem_t *)*ctxp;
REQUIRE(VALID_CONTEXT(ctx));
REQUIRE(ptr != NULL);
/*
* Must be before mem_putunlocked() as ctxp is usually within
* [ptr..ptr+size).
*/
*ctxp = NULL;
if ((isc_mem_debugging & (ISC_MEM_DEBUGSIZE|ISC_MEM_DEBUGCTX)) != 0) {
if ((isc_mem_debugging & ISC_MEM_DEBUGSIZE) != 0) {
si = &(((size_info *)ptr)[-1]);
oldsize = si->u.size - ALIGNMENT_SIZE;
if ((isc_mem_debugging & ISC_MEM_DEBUGCTX) != 0)
oldsize -= ALIGNMENT_SIZE;
INSIST(oldsize == size);
}
isc__mem_free((isc_mem_t *)ctx, ptr FLARG_PASS);
MCTXLOCK(ctx, &ctx->lock);
ctx->references--;
if (ctx->references == 0)
want_destroy = ISC_TRUE;
MCTXUNLOCK(ctx, &ctx->lock);
if (want_destroy)
destroy(ctx);
return;
}
if ((ctx->flags & ISC_MEMFLAG_INTERNAL) != 0) {
MCTXLOCK(ctx, &ctx->lock);
mem_putunlocked(ctx, ptr, size);
} else {
mem_put(ctx, ptr, size);
MCTXLOCK(ctx, &ctx->lock);
mem_putstats(ctx, ptr, size);
}
DELETE_TRACE(ctx, ptr, size, file, line);
INSIST(ctx->references > 0);
ctx->references--;
if (ctx->references == 0)
want_destroy = ISC_TRUE;
MCTXUNLOCK(ctx, &ctx->lock);
if (want_destroy)
destroy(ctx);
}
ISC_MEMFUNC_SCOPE void
isc__mem_destroy(isc_mem_t **ctxp) {
isc__mem_t *ctx;
/*
* This routine provides legacy support for callers who use mctxs
* without attaching/detaching.
*/
REQUIRE(ctxp != NULL);
ctx = (isc__mem_t *)*ctxp;
REQUIRE(VALID_CONTEXT(ctx));
MCTXLOCK(ctx, &ctx->lock);
#if ISC_MEM_TRACKLINES
if (ctx->references != 1)
print_active(ctx, stderr);
#endif
REQUIRE(ctx->references == 1);
ctx->references--;
MCTXUNLOCK(ctx, &ctx->lock);
destroy(ctx);
*ctxp = NULL;
}
ISC_MEMFUNC_SCOPE isc_result_t
isc__mem_ondestroy(isc_mem_t *ctx0, isc_task_t *task, isc_event_t **event) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
isc_result_t res;
MCTXLOCK(ctx, &ctx->lock);
res = isc_ondestroy_register(&ctx->ondestroy, task, event);
MCTXUNLOCK(ctx, &ctx->lock);
return (res);
}
ISC_MEMFUNC_SCOPE void *
isc___mem_get(isc_mem_t *ctx0, size_t size FLARG) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
void *ptr;
isc_boolean_t call_water = ISC_FALSE;
REQUIRE(VALID_CONTEXT(ctx));
if ((isc_mem_debugging & (ISC_MEM_DEBUGSIZE|ISC_MEM_DEBUGCTX)) != 0)
return (isc__mem_allocate(ctx0, size FLARG_PASS));
if ((ctx->flags & ISC_MEMFLAG_INTERNAL) != 0) {
MCTXLOCK(ctx, &ctx->lock);
ptr = mem_getunlocked(ctx, size);
} else {
ptr = mem_get(ctx, size);
MCTXLOCK(ctx, &ctx->lock);
if (ptr != NULL)
mem_getstats(ctx, size);
}
ADD_TRACE(ctx, ptr, size, file, line);
if (ctx->hi_water != 0U && ctx->inuse > ctx->hi_water &&
!ctx->is_overmem) {
ctx->is_overmem = ISC_TRUE;
}
if (ctx->hi_water != 0U && !ctx->hi_called &&
ctx->inuse > ctx->hi_water) {
call_water = ISC_TRUE;
}
if (ctx->inuse > ctx->maxinuse) {
ctx->maxinuse = ctx->inuse;
if (ctx->hi_water != 0U && ctx->inuse > ctx->hi_water &&
(isc_mem_debugging & ISC_MEM_DEBUGUSAGE) != 0)
fprintf(stderr, "maxinuse = %lu\n",
(unsigned long)ctx->inuse);
}
MCTXUNLOCK(ctx, &ctx->lock);
if (call_water)
(ctx->water)(ctx->water_arg, ISC_MEM_HIWATER);
return (ptr);
}
ISC_MEMFUNC_SCOPE void
isc___mem_put(isc_mem_t *ctx0, void *ptr, size_t size FLARG) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
isc_boolean_t call_water = ISC_FALSE;
size_info *si;
size_t oldsize;
REQUIRE(VALID_CONTEXT(ctx));
REQUIRE(ptr != NULL);
if ((isc_mem_debugging & (ISC_MEM_DEBUGSIZE|ISC_MEM_DEBUGCTX)) != 0) {
if ((isc_mem_debugging & ISC_MEM_DEBUGSIZE) != 0) {
si = &(((size_info *)ptr)[-1]);
oldsize = si->u.size - ALIGNMENT_SIZE;
if ((isc_mem_debugging & ISC_MEM_DEBUGCTX) != 0)
oldsize -= ALIGNMENT_SIZE;
INSIST(oldsize == size);
}
isc__mem_free((isc_mem_t *)ctx, ptr FLARG_PASS);
return;
}
if ((ctx->flags & ISC_MEMFLAG_INTERNAL) != 0) {
MCTXLOCK(ctx, &ctx->lock);
mem_putunlocked(ctx, ptr, size);
} else {
mem_put(ctx, ptr, size);
MCTXLOCK(ctx, &ctx->lock);
mem_putstats(ctx, ptr, size);
}
DELETE_TRACE(ctx, ptr, size, file, line);
/*
* The check against ctx->lo_water == 0 is for the condition
* when the context was pushed over hi_water but then had
* isc_mem_setwater() called with 0 for hi_water and lo_water.
*/
if (ctx->is_overmem &&
(ctx->inuse < ctx->lo_water || ctx->lo_water == 0U)) {
ctx->is_overmem = ISC_FALSE;
}
if (ctx->hi_called &&
(ctx->inuse < ctx->lo_water || ctx->lo_water == 0U)) {
if (ctx->water != NULL)
call_water = ISC_TRUE;
}
MCTXUNLOCK(ctx, &ctx->lock);
if (call_water)
(ctx->water)(ctx->water_arg, ISC_MEM_LOWATER);
}
ISC_MEMFUNC_SCOPE void
isc__mem_waterack(isc_mem_t *ctx0, int flag) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
REQUIRE(VALID_CONTEXT(ctx));
MCTXLOCK(ctx, &ctx->lock);
if (flag == ISC_MEM_LOWATER)
ctx->hi_called = ISC_FALSE;
else if (flag == ISC_MEM_HIWATER)
ctx->hi_called = ISC_TRUE;
MCTXUNLOCK(ctx, &ctx->lock);
}
#if ISC_MEM_TRACKLINES
static void
print_active(isc__mem_t *mctx, FILE *out) {
if (mctx->debuglist != NULL) {
debuglink_t *dl;
unsigned int i, j;
const char *format;
isc_boolean_t found;
fprintf(out, "%s", isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_DUMPALLOC,
"Dump of all outstanding "
"memory allocations:\n"));
found = ISC_FALSE;
format = isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_PTRFILELINE,
"\tptr %p size %u file %s line %u\n");
for (i = 0; i <= mctx->max_size; i++) {
dl = ISC_LIST_HEAD(mctx->debuglist[i]);
if (dl != NULL)
found = ISC_TRUE;
while (dl != NULL) {
for (j = 0; j < DEBUGLIST_COUNT; j++)
if (dl->ptr[j] != NULL)
fprintf(out, format,
dl->ptr[j],
dl->size[j],
dl->file[j],
dl->line[j]);
dl = ISC_LIST_NEXT(dl, link);
}
}
if (!found)
fprintf(out, "%s", isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_NONE, "\tNone.\n"));
}
}
#endif
/*
* Print the stats[] on the stream "out" with suitable formatting.
*/
ISC_MEMFUNC_SCOPE void
isc__mem_stats(isc_mem_t *ctx0, FILE *out) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
size_t i;
const struct stats *s;
const isc__mempool_t *pool;
REQUIRE(VALID_CONTEXT(ctx));
MCTXLOCK(ctx, &ctx->lock);
for (i = 0; i <= ctx->max_size; i++) {
s = &ctx->stats[i];
if (s->totalgets == 0U && s->gets == 0U)
continue;
fprintf(out, "%s%5lu: %11lu gets, %11lu rem",
(i == ctx->max_size) ? ">=" : " ",
(unsigned long) i, s->totalgets, s->gets);
if ((ctx->flags & ISC_MEMFLAG_INTERNAL) != 0 &&
(s->blocks != 0U || s->freefrags != 0U))
fprintf(out, " (%lu bl, %lu ff)",
s->blocks, s->freefrags);
fputc('\n', out);
}
/*
* Note that since a pool can be locked now, these stats might be
* somewhat off if the pool is in active use at the time the stats
* are dumped. The link fields are protected by the isc_mem_t's
* lock, however, so walking this list and extracting integers from
* stats fields is always safe.
*/
pool = ISC_LIST_HEAD(ctx->pools);
if (pool != NULL) {
fprintf(out, "%s", isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_POOLSTATS,
"[Pool statistics]\n"));
fprintf(out, "%15s %10s %10s %10s %10s %10s %10s %10s %1s\n",
isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_POOLNAME, "name"),
isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_POOLSIZE, "size"),
isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_POOLMAXALLOC, "maxalloc"),
isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_POOLALLOCATED, "allocated"),
isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_POOLFREECOUNT, "freecount"),
isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_POOLFREEMAX, "freemax"),
isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_POOLFILLCOUNT, "fillcount"),
isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_POOLGETS, "gets"),
"L");
}
while (pool != NULL) {
fprintf(out, "%15s %10lu %10u %10u %10u %10u %10u %10u %s\n",
pool->name, (unsigned long) pool->size, pool->maxalloc,
pool->allocated, pool->freecount, pool->freemax,
pool->fillcount, pool->gets,
(pool->lock == NULL ? "N" : "Y"));
pool = ISC_LIST_NEXT(pool, link);
}
#if ISC_MEM_TRACKLINES
print_active(ctx, out);
#endif
MCTXUNLOCK(ctx, &ctx->lock);
}
/*
* Replacements for malloc() and free() -- they implicitly remember the
* size of the object allocated (with some additional overhead).
*/
static void *
isc__mem_allocateunlocked(isc_mem_t *ctx0, size_t size) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
size_info *si;
size += ALIGNMENT_SIZE;
if ((isc_mem_debugging & ISC_MEM_DEBUGCTX) != 0)
size += ALIGNMENT_SIZE;
if ((ctx->flags & ISC_MEMFLAG_INTERNAL) != 0)
si = mem_getunlocked(ctx, size);
else
si = mem_get(ctx, size);
if (si == NULL)
return (NULL);
if ((isc_mem_debugging & ISC_MEM_DEBUGCTX) != 0) {
si->u.ctx = ctx;
si++;
}
si->u.size = size;
return (&si[1]);
}
ISC_MEMFUNC_SCOPE void *
isc___mem_allocate(isc_mem_t *ctx0, size_t size FLARG) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
size_info *si;
isc_boolean_t call_water = ISC_FALSE;
REQUIRE(VALID_CONTEXT(ctx));
if ((ctx->flags & ISC_MEMFLAG_INTERNAL) != 0) {
MCTXLOCK(ctx, &ctx->lock);
si = isc__mem_allocateunlocked((isc_mem_t *)ctx, size);
} else {
si = isc__mem_allocateunlocked((isc_mem_t *)ctx, size);
MCTXLOCK(ctx, &ctx->lock);
if (si != NULL)
mem_getstats(ctx, si[-1].u.size);
}
#if ISC_MEM_TRACKLINES
ADD_TRACE(ctx, si, si[-1].u.size, file, line);
#endif
if (ctx->hi_water != 0U && ctx->inuse > ctx->hi_water &&
!ctx->is_overmem) {
ctx->is_overmem = ISC_TRUE;
}
if (ctx->hi_water != 0U && !ctx->hi_called &&
ctx->inuse > ctx->hi_water) {
ctx->hi_called = ISC_TRUE;
call_water = ISC_TRUE;
}
if (ctx->inuse > ctx->maxinuse) {
ctx->maxinuse = ctx->inuse;
if (ctx->hi_water != 0U && ctx->inuse > ctx->hi_water &&
(isc_mem_debugging & ISC_MEM_DEBUGUSAGE) != 0)
fprintf(stderr, "maxinuse = %lu\n",
(unsigned long)ctx->inuse);
}
MCTXUNLOCK(ctx, &ctx->lock);
if (call_water)
(ctx->water)(ctx->water_arg, ISC_MEM_HIWATER);
return (si);
}
ISC_MEMFUNC_SCOPE void *
isc___mem_reallocate(isc_mem_t *ctx0, void *ptr, size_t size FLARG) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
void *new_ptr = NULL;
size_t oldsize, copysize;
REQUIRE(VALID_CONTEXT(ctx));
/*
* This function emulates the realloc(3) standard library function:
* - if size > 0, allocate new memory; and if ptr is non NULL, copy
* as much of the old contents to the new buffer and free the old one.
* Note that when allocation fails the original pointer is intact;
* the caller must free it.
* - if size is 0 and ptr is non NULL, simply free the given ptr.
* - this function returns:
* pointer to the newly allocated memory, or
* NULL if allocation fails or doesn't happen.
*/
if (size > 0U) {
new_ptr = isc__mem_allocate(ctx0, size FLARG_PASS);
if (new_ptr != NULL && ptr != NULL) {
oldsize = (((size_info *)ptr)[-1]).u.size;
INSIST(oldsize >= ALIGNMENT_SIZE);
oldsize -= ALIGNMENT_SIZE;
if ((isc_mem_debugging & ISC_MEM_DEBUGCTX) != 0) {
INSIST(oldsize >= ALIGNMENT_SIZE);
oldsize -= ALIGNMENT_SIZE;
}
copysize = (oldsize > size) ? size : oldsize;
memcpy(new_ptr, ptr, copysize);
isc__mem_free(ctx0, ptr FLARG_PASS);
}
} else if (ptr != NULL)
isc__mem_free(ctx0, ptr FLARG_PASS);
return (new_ptr);
}
ISC_MEMFUNC_SCOPE void
isc___mem_free(isc_mem_t *ctx0, void *ptr FLARG) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
size_info *si;
size_t size;
isc_boolean_t call_water= ISC_FALSE;
REQUIRE(VALID_CONTEXT(ctx));
REQUIRE(ptr != NULL);
if ((isc_mem_debugging & ISC_MEM_DEBUGCTX) != 0) {
si = &(((size_info *)ptr)[-2]);
REQUIRE(si->u.ctx == ctx);
size = si[1].u.size;
} else {
si = &(((size_info *)ptr)[-1]);
size = si->u.size;
}
if ((ctx->flags & ISC_MEMFLAG_INTERNAL) != 0) {
MCTXLOCK(ctx, &ctx->lock);
mem_putunlocked(ctx, si, size);
} else {
mem_put(ctx, si, size);
MCTXLOCK(ctx, &ctx->lock);
mem_putstats(ctx, si, size);
}
DELETE_TRACE(ctx, ptr, size, file, line);
/*
* The check against ctx->lo_water == 0 is for the condition
* when the context was pushed over hi_water but then had
* isc_mem_setwater() called with 0 for hi_water and lo_water.
*/
if (ctx->is_overmem &&
(ctx->inuse < ctx->lo_water || ctx->lo_water == 0U)) {
ctx->is_overmem = ISC_FALSE;
}
if (ctx->hi_called &&
(ctx->inuse < ctx->lo_water || ctx->lo_water == 0U)) {
ctx->hi_called = ISC_FALSE;
if (ctx->water != NULL)
call_water = ISC_TRUE;
}
MCTXUNLOCK(ctx, &ctx->lock);
if (call_water)
(ctx->water)(ctx->water_arg, ISC_MEM_LOWATER);
}
/*
* Other useful things.
*/
ISC_MEMFUNC_SCOPE char *
isc___mem_strdup(isc_mem_t *mctx0, const char *s FLARG) {
isc__mem_t *mctx = (isc__mem_t *)mctx0;
size_t len;
char *ns;
REQUIRE(VALID_CONTEXT(mctx));
REQUIRE(s != NULL);
len = strlen(s);
ns = isc___mem_allocate((isc_mem_t *)mctx, len + 1 FLARG_PASS);
if (ns != NULL)
strncpy(ns, s, len + 1);
return (ns);
}
ISC_MEMFUNC_SCOPE void
isc__mem_setdestroycheck(isc_mem_t *ctx0, isc_boolean_t flag) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
REQUIRE(VALID_CONTEXT(ctx));
MCTXLOCK(ctx, &ctx->lock);
ctx->checkfree = flag;
MCTXUNLOCK(ctx, &ctx->lock);
}
/*
* Quotas
*/
ISC_MEMFUNC_SCOPE void
isc__mem_setquota(isc_mem_t *ctx0, size_t quota) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
REQUIRE(VALID_CONTEXT(ctx));
MCTXLOCK(ctx, &ctx->lock);
ctx->quota = quota;
MCTXUNLOCK(ctx, &ctx->lock);
}
ISC_MEMFUNC_SCOPE size_t
isc__mem_getquota(isc_mem_t *ctx0) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
size_t quota;
REQUIRE(VALID_CONTEXT(ctx));
MCTXLOCK(ctx, &ctx->lock);
quota = ctx->quota;
MCTXUNLOCK(ctx, &ctx->lock);
return (quota);
}
ISC_MEMFUNC_SCOPE size_t
isc__mem_inuse(isc_mem_t *ctx0) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
size_t inuse;
REQUIRE(VALID_CONTEXT(ctx));
MCTXLOCK(ctx, &ctx->lock);
inuse = ctx->inuse;
MCTXUNLOCK(ctx, &ctx->lock);
return (inuse);
}
ISC_MEMFUNC_SCOPE void
isc__mem_setwater(isc_mem_t *ctx0, isc_mem_water_t water, void *water_arg,
size_t hiwater, size_t lowater)
{
isc__mem_t *ctx = (isc__mem_t *)ctx0;
isc_boolean_t callwater = ISC_FALSE;
isc_mem_water_t oldwater;
void *oldwater_arg;
REQUIRE(VALID_CONTEXT(ctx));
REQUIRE(hiwater >= lowater);
MCTXLOCK(ctx, &ctx->lock);
oldwater = ctx->water;
oldwater_arg = ctx->water_arg;
if (water == NULL) {
callwater = ctx->hi_called;
ctx->water = NULL;
ctx->water_arg = NULL;
ctx->hi_water = 0;
ctx->lo_water = 0;
ctx->hi_called = ISC_FALSE;
} else {
if (ctx->hi_called &&
(ctx->water != water || ctx->water_arg != water_arg ||
ctx->inuse < lowater || lowater == 0U))
callwater = ISC_TRUE;
ctx->water = water;
ctx->water_arg = water_arg;
ctx->hi_water = hiwater;
ctx->lo_water = lowater;
ctx->hi_called = ISC_FALSE;
}
MCTXUNLOCK(ctx, &ctx->lock);
if (callwater && oldwater != NULL)
(oldwater)(oldwater_arg, ISC_MEM_LOWATER);
}
ISC_MEMFUNC_SCOPE isc_boolean_t
isc__mem_isovermem(isc_mem_t *ctx0) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
REQUIRE(VALID_CONTEXT(ctx));
/*
* We don't bother to lock the context because 100% accuracy isn't
* necessary (and even if we locked the context the returned value
* could be different from the actual state when it's used anyway)
*/
return (ctx->is_overmem);
}
ISC_MEMFUNC_SCOPE void
isc__mem_setname(isc_mem_t *ctx0, const char *name, void *tag) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
REQUIRE(VALID_CONTEXT(ctx));
LOCK(&ctx->lock);
memset(ctx->name, 0, sizeof(ctx->name));
strncpy(ctx->name, name, sizeof(ctx->name) - 1);
ctx->tag = tag;
UNLOCK(&ctx->lock);
}
ISC_MEMFUNC_SCOPE const char *
isc__mem_getname(isc_mem_t *ctx0) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
REQUIRE(VALID_CONTEXT(ctx));
return (ctx->name);
}
ISC_MEMFUNC_SCOPE void *
isc__mem_gettag(isc_mem_t *ctx0) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
REQUIRE(VALID_CONTEXT(ctx));
return (ctx->tag);
}
/*
* Memory pool stuff
*/
ISC_MEMFUNC_SCOPE isc_result_t
isc__mempool_create(isc_mem_t *mctx0, size_t size, isc_mempool_t **mpctxp) {
isc__mem_t *mctx = (isc__mem_t *)mctx0;
isc__mempool_t *mpctx;
REQUIRE(VALID_CONTEXT(mctx));
REQUIRE(size > 0U);
REQUIRE(mpctxp != NULL && *mpctxp == NULL);
/*
* Allocate space for this pool, initialize values, and if all works
* well, attach to the memory context.
*/
mpctx = isc_mem_get((isc_mem_t *)mctx, sizeof(isc__mempool_t));
if (mpctx == NULL)
return (ISC_R_NOMEMORY);
mpctx->common.methods = (isc_mempoolmethods_t *)&mempoolmethods;
mpctx->common.impmagic = MEMPOOL_MAGIC;
mpctx->common.magic = ISCAPI_MPOOL_MAGIC;
mpctx->lock = NULL;
mpctx->mctx = mctx;
mpctx->size = size;
mpctx->maxalloc = UINT_MAX;
mpctx->allocated = 0;
mpctx->freecount = 0;
mpctx->freemax = 1;
mpctx->fillcount = 1;
mpctx->gets = 0;
#if ISC_MEMPOOL_NAMES
mpctx->name[0] = 0;
#endif
mpctx->items = NULL;
*mpctxp = (isc_mempool_t *)mpctx;
MCTXLOCK(mctx, &mctx->lock);
ISC_LIST_INITANDAPPEND(mctx->pools, mpctx, link);
mctx->poolcnt++;
MCTXUNLOCK(mctx, &mctx->lock);
return (ISC_R_SUCCESS);
}
ISC_MEMFUNC_SCOPE void
isc__mempool_setname(isc_mempool_t *mpctx0, const char *name) {
isc__mempool_t *mpctx = (isc__mempool_t *)mpctx0;
REQUIRE(name != NULL);
REQUIRE(VALID_MEMPOOL(mpctx));
#if ISC_MEMPOOL_NAMES
if (mpctx->lock != NULL)
LOCK(mpctx->lock);
strncpy(mpctx->name, name, sizeof(mpctx->name) - 1);
mpctx->name[sizeof(mpctx->name) - 1] = '\0';
if (mpctx->lock != NULL)
UNLOCK(mpctx->lock);
#else
UNUSED(mpctx);
UNUSED(name);
#endif
}
ISC_MEMFUNC_SCOPE void
isc__mempool_destroy(isc_mempool_t **mpctxp) {
isc__mempool_t *mpctx;
isc__mem_t *mctx;
isc_mutex_t *lock;
element *item;
REQUIRE(mpctxp != NULL);
mpctx = (isc__mempool_t *)*mpctxp;
REQUIRE(VALID_MEMPOOL(mpctx));
#if ISC_MEMPOOL_NAMES
if (mpctx->allocated > 0)
UNEXPECTED_ERROR(__FILE__, __LINE__,
"isc__mempool_destroy(): mempool %s "
"leaked memory",
mpctx->name);
#endif
REQUIRE(mpctx->allocated == 0);
mctx = mpctx->mctx;
lock = mpctx->lock;
if (lock != NULL)
LOCK(lock);
/*
* Return any items on the free list
*/
MCTXLOCK(mctx, &mctx->lock);
while (mpctx->items != NULL) {
INSIST(mpctx->freecount > 0);
mpctx->freecount--;
item = mpctx->items;
mpctx->items = item->next;
if ((mctx->flags & ISC_MEMFLAG_INTERNAL) != 0) {
mem_putunlocked(mctx, item, mpctx->size);
} else {
mem_put(mctx, item, mpctx->size);
mem_putstats(mctx, item, mpctx->size);
}
}
MCTXUNLOCK(mctx, &mctx->lock);
/*
* Remove our linked list entry from the memory context.
*/
MCTXLOCK(mctx, &mctx->lock);
ISC_LIST_UNLINK(mctx->pools, mpctx, link);
mctx->poolcnt--;
MCTXUNLOCK(mctx, &mctx->lock);
mpctx->common.impmagic = 0;
mpctx->common.magic = 0;
isc_mem_put((isc_mem_t *)mpctx->mctx, mpctx, sizeof(isc__mempool_t));
if (lock != NULL)
UNLOCK(lock);
*mpctxp = NULL;
}
ISC_MEMFUNC_SCOPE void
isc__mempool_associatelock(isc_mempool_t *mpctx0, isc_mutex_t *lock) {
isc__mempool_t *mpctx = (isc__mempool_t *)mpctx0;
REQUIRE(VALID_MEMPOOL(mpctx));
REQUIRE(mpctx->lock == NULL);
REQUIRE(lock != NULL);
mpctx->lock = lock;
}
ISC_MEMFUNC_SCOPE void *
isc___mempool_get(isc_mempool_t *mpctx0 FLARG) {
isc__mempool_t *mpctx = (isc__mempool_t *)mpctx0;
element *item;
isc__mem_t *mctx;
unsigned int i;
REQUIRE(VALID_MEMPOOL(mpctx));
mctx = mpctx->mctx;
if (mpctx->lock != NULL)
LOCK(mpctx->lock);
/*
* Don't let the caller go over quota
*/
if (mpctx->allocated >= mpctx->maxalloc) {
item = NULL;
goto out;
}
/*
* if we have a free list item, return the first here
*/
item = mpctx->items;
if (item != NULL) {
mpctx->items = item->next;
INSIST(mpctx->freecount > 0);
mpctx->freecount--;
mpctx->gets++;
mpctx->allocated++;
goto out;
}
/*
* We need to dip into the well. Lock the memory context here and
* fill up our free list.
*/
MCTXLOCK(mctx, &mctx->lock);
for (i = 0; i < mpctx->fillcount; i++) {
if ((mctx->flags & ISC_MEMFLAG_INTERNAL) != 0) {
item = mem_getunlocked(mctx, mpctx->size);
} else {
item = mem_get(mctx, mpctx->size);
if (item != NULL)
mem_getstats(mctx, mpctx->size);
}
if (item == NULL)
break;
item->next = mpctx->items;
mpctx->items = item;
mpctx->freecount++;
}
MCTXUNLOCK(mctx, &mctx->lock);
/*
* If we didn't get any items, return NULL.
*/
item = mpctx->items;
if (item == NULL)
goto out;
mpctx->items = item->next;
mpctx->freecount--;
mpctx->gets++;
mpctx->allocated++;
out:
if (mpctx->lock != NULL)
UNLOCK(mpctx->lock);
#if ISC_MEM_TRACKLINES
if (item != NULL) {
MCTXLOCK(mctx, &mctx->lock);
ADD_TRACE(mctx, item, mpctx->size, file, line);
MCTXUNLOCK(mctx, &mctx->lock);
}
#endif /* ISC_MEM_TRACKLINES */
return (item);
}
ISC_MEMFUNC_SCOPE void
isc___mempool_put(isc_mempool_t *mpctx0, void *mem FLARG) {
isc__mempool_t *mpctx = (isc__mempool_t *)mpctx0;
isc__mem_t *mctx;
element *item;
REQUIRE(VALID_MEMPOOL(mpctx));
REQUIRE(mem != NULL);
mctx = mpctx->mctx;
if (mpctx->lock != NULL)
LOCK(mpctx->lock);
INSIST(mpctx->allocated > 0);
mpctx->allocated--;
#if ISC_MEM_TRACKLINES
MCTXLOCK(mctx, &mctx->lock);
DELETE_TRACE(mctx, mem, mpctx->size, file, line);
MCTXUNLOCK(mctx, &mctx->lock);
#endif /* ISC_MEM_TRACKLINES */
/*
* If our free list is full, return this to the mctx directly.
*/
if (mpctx->freecount >= mpctx->freemax) {
if ((mctx->flags & ISC_MEMFLAG_INTERNAL) != 0) {
MCTXLOCK(mctx, &mctx->lock);
mem_putunlocked(mctx, mem, mpctx->size);
MCTXUNLOCK(mctx, &mctx->lock);
} else {
mem_put(mctx, mem, mpctx->size);
MCTXLOCK(mctx, &mctx->lock);
mem_putstats(mctx, mem, mpctx->size);
MCTXUNLOCK(mctx, &mctx->lock);
}
if (mpctx->lock != NULL)
UNLOCK(mpctx->lock);
return;
}
/*
* Otherwise, attach it to our free list and bump the counter.
*/
mpctx->freecount++;
item = (element *)mem;
item->next = mpctx->items;
mpctx->items = item;
if (mpctx->lock != NULL)
UNLOCK(mpctx->lock);
}
/*
* Quotas
*/
ISC_MEMFUNC_SCOPE void
isc__mempool_setfreemax(isc_mempool_t *mpctx0, unsigned int limit) {
isc__mempool_t *mpctx = (isc__mempool_t *)mpctx0;
REQUIRE(VALID_MEMPOOL(mpctx));
if (mpctx->lock != NULL)
LOCK(mpctx->lock);
mpctx->freemax = limit;
if (mpctx->lock != NULL)
UNLOCK(mpctx->lock);
}
ISC_MEMFUNC_SCOPE unsigned int
isc__mempool_getfreemax(isc_mempool_t *mpctx0) {
isc__mempool_t *mpctx = (isc__mempool_t *)mpctx0;
unsigned int freemax;
REQUIRE(VALID_MEMPOOL(mpctx));
if (mpctx->lock != NULL)
LOCK(mpctx->lock);
freemax = mpctx->freemax;
if (mpctx->lock != NULL)
UNLOCK(mpctx->lock);
return (freemax);
}
ISC_MEMFUNC_SCOPE unsigned int
isc__mempool_getfreecount(isc_mempool_t *mpctx0) {
isc__mempool_t *mpctx = (isc__mempool_t *)mpctx0;
unsigned int freecount;
REQUIRE(VALID_MEMPOOL(mpctx));
if (mpctx->lock != NULL)
LOCK(mpctx->lock);
freecount = mpctx->freecount;
if (mpctx->lock != NULL)
UNLOCK(mpctx->lock);
return (freecount);
}
ISC_MEMFUNC_SCOPE void
isc__mempool_setmaxalloc(isc_mempool_t *mpctx0, unsigned int limit) {
isc__mempool_t *mpctx = (isc__mempool_t *)mpctx0;
REQUIRE(limit > 0);
REQUIRE(VALID_MEMPOOL(mpctx));
if (mpctx->lock != NULL)
LOCK(mpctx->lock);
mpctx->maxalloc = limit;
if (mpctx->lock != NULL)
UNLOCK(mpctx->lock);
}
ISC_MEMFUNC_SCOPE unsigned int
isc__mempool_getmaxalloc(isc_mempool_t *mpctx0) {
isc__mempool_t *mpctx = (isc__mempool_t *)mpctx0;
unsigned int maxalloc;
REQUIRE(VALID_MEMPOOL(mpctx));
if (mpctx->lock != NULL)
LOCK(mpctx->lock);
maxalloc = mpctx->maxalloc;
if (mpctx->lock != NULL)
UNLOCK(mpctx->lock);
return (maxalloc);
}
ISC_MEMFUNC_SCOPE unsigned int
isc__mempool_getallocated(isc_mempool_t *mpctx0) {
isc__mempool_t *mpctx = (isc__mempool_t *)mpctx0;
unsigned int allocated;
REQUIRE(VALID_MEMPOOL(mpctx));
if (mpctx->lock != NULL)
LOCK(mpctx->lock);
allocated = mpctx->allocated;
if (mpctx->lock != NULL)
UNLOCK(mpctx->lock);
return (allocated);
}
ISC_MEMFUNC_SCOPE void
isc__mempool_setfillcount(isc_mempool_t *mpctx0, unsigned int limit) {
isc__mempool_t *mpctx = (isc__mempool_t *)mpctx0;
REQUIRE(limit > 0);
REQUIRE(VALID_MEMPOOL(mpctx));
if (mpctx->lock != NULL)
LOCK(mpctx->lock);
mpctx->fillcount = limit;
if (mpctx->lock != NULL)
UNLOCK(mpctx->lock);
}
ISC_MEMFUNC_SCOPE unsigned int
isc__mempool_getfillcount(isc_mempool_t *mpctx0) {
isc__mempool_t *mpctx = (isc__mempool_t *)mpctx0;
unsigned int fillcount;
REQUIRE(VALID_MEMPOOL(mpctx));
if (mpctx->lock != NULL)
LOCK(mpctx->lock);
fillcount = mpctx->fillcount;
if (mpctx->lock != NULL)
UNLOCK(mpctx->lock);
return (fillcount);
}
#ifdef USE_MEMIMPREGISTER
isc_result_t
isc__mem_register() {
return (isc_mem_register(isc__mem_create2));
}
#endif
#ifdef BIND9
ISC_MEMFUNC_SCOPE void
isc__mem_printactive(isc_mem_t *ctx0, FILE *file) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
REQUIRE(VALID_CONTEXT(ctx));
REQUIRE(file != NULL);
#if !ISC_MEM_TRACKLINES
UNUSED(ctx);
UNUSED(file);
#else
print_active(ctx, file);
#endif
}
ISC_MEMFUNC_SCOPE void
isc__mem_printallactive(FILE *file) {
#if !ISC_MEM_TRACKLINES
UNUSED(file);
#else
isc__mem_t *ctx;
RUNTIME_CHECK(isc_once_do(&once, initialize_action) == ISC_R_SUCCESS);
LOCK(&lock);
for (ctx = ISC_LIST_HEAD(contexts);
ctx != NULL;
ctx = ISC_LIST_NEXT(ctx, link)) {
fprintf(file, "context: %p\n", ctx);
print_active(ctx, file);
}
UNLOCK(&lock);
#endif
}
ISC_MEMFUNC_SCOPE void
isc__mem_checkdestroyed(FILE *file) {
RUNTIME_CHECK(isc_once_do(&once, initialize_action) == ISC_R_SUCCESS);
LOCK(&lock);
if (!ISC_LIST_EMPTY(contexts)) {
#if ISC_MEM_TRACKLINES
isc__mem_t *ctx;
for (ctx = ISC_LIST_HEAD(contexts);
ctx != NULL;
ctx = ISC_LIST_NEXT(ctx, link)) {
fprintf(file, "context: %p\n", ctx);
print_active(ctx, file);
}
fflush(file);
#endif
INSIST(0);
}
UNLOCK(&lock);
}
ISC_MEMFUNC_SCOPE unsigned int
isc_mem_references(isc_mem_t *ctx0) {
isc__mem_t *ctx = (isc__mem_t *)ctx0;
unsigned int references;
REQUIRE(VALID_CONTEXT(ctx));
MCTXLOCK(ctx, &ctx->lock);
references = ctx->references;
MCTXUNLOCK(ctx, &ctx->lock);
return (references);
}
#ifdef HAVE_LIBXML2
typedef struct summarystat {
isc_uint64_t total;
isc_uint64_t inuse;
isc_uint64_t blocksize;
isc_uint64_t contextsize;
} summarystat_t;
static void
renderctx(isc__mem_t *ctx, summarystat_t *summary, xmlTextWriterPtr writer) {
REQUIRE(VALID_CONTEXT(ctx));
xmlTextWriterStartElement(writer, ISC_XMLCHAR "context");
xmlTextWriterStartElement(writer, ISC_XMLCHAR "id");
xmlTextWriterWriteFormatString(writer, "%p", ctx);
xmlTextWriterEndElement(writer); /* id */
if (ctx->name[0] != 0) {
xmlTextWriterStartElement(writer, ISC_XMLCHAR "name");
xmlTextWriterWriteFormatString(writer, "%s", ctx->name);
xmlTextWriterEndElement(writer); /* name */
}
REQUIRE(VALID_CONTEXT(ctx));
MCTXLOCK(ctx, &ctx->lock);
summary->contextsize += sizeof(*ctx) +
(ctx->max_size + 1) * sizeof(struct stats) +
ctx->max_size * sizeof(element *) +
ctx->basic_table_count * sizeof(char *);
#if ISC_MEM_TRACKLINES
if (ctx->debuglist != NULL) {
summary->contextsize +=
(ctx->max_size + 1) * sizeof(debuglist_t) +
ctx->debuglistcnt * sizeof(debuglink_t);
}
#endif
xmlTextWriterStartElement(writer, ISC_XMLCHAR "references");
xmlTextWriterWriteFormatString(writer, "%d", ctx->references);
xmlTextWriterEndElement(writer); /* references */
summary->total += ctx->total;
xmlTextWriterStartElement(writer, ISC_XMLCHAR "total");
xmlTextWriterWriteFormatString(writer, "%" ISC_PRINT_QUADFORMAT "u",
(isc_uint64_t)ctx->total);
xmlTextWriterEndElement(writer); /* total */
summary->inuse += ctx->inuse;
xmlTextWriterStartElement(writer, ISC_XMLCHAR "inuse");
xmlTextWriterWriteFormatString(writer, "%" ISC_PRINT_QUADFORMAT "u",
(isc_uint64_t)ctx->inuse);
xmlTextWriterEndElement(writer); /* inuse */
xmlTextWriterStartElement(writer, ISC_XMLCHAR "maxinuse");
xmlTextWriterWriteFormatString(writer, "%" ISC_PRINT_QUADFORMAT "u",
(isc_uint64_t)ctx->maxinuse);
xmlTextWriterEndElement(writer); /* maxinuse */
xmlTextWriterStartElement(writer, ISC_XMLCHAR "blocksize");
if ((ctx->flags & ISC_MEMFLAG_INTERNAL) != 0) {
summary->blocksize += ctx->basic_table_count *
NUM_BASIC_BLOCKS * ctx->mem_target;
xmlTextWriterWriteFormatString(writer,
"%" ISC_PRINT_QUADFORMAT "u",
(isc_uint64_t)
ctx->basic_table_count *
NUM_BASIC_BLOCKS *
ctx->mem_target);
} else
xmlTextWriterWriteFormatString(writer, "%s", "-");
xmlTextWriterEndElement(writer); /* blocksize */
xmlTextWriterStartElement(writer, ISC_XMLCHAR "pools");
xmlTextWriterWriteFormatString(writer, "%u", ctx->poolcnt);
xmlTextWriterEndElement(writer); /* pools */
summary->contextsize += ctx->poolcnt * sizeof(isc_mempool_t);
xmlTextWriterStartElement(writer, ISC_XMLCHAR "hiwater");
xmlTextWriterWriteFormatString(writer, "%" ISC_PRINT_QUADFORMAT "u",
(isc_uint64_t)ctx->hi_water);
xmlTextWriterEndElement(writer); /* hiwater */
xmlTextWriterStartElement(writer, ISC_XMLCHAR "lowater");
xmlTextWriterWriteFormatString(writer, "%" ISC_PRINT_QUADFORMAT "u",
(isc_uint64_t)ctx->lo_water);
xmlTextWriterEndElement(writer); /* lowater */
MCTXUNLOCK(ctx, &ctx->lock);
xmlTextWriterEndElement(writer); /* context */
}
void
isc_mem_renderxml(xmlTextWriterPtr writer) {
isc__mem_t *ctx;
summarystat_t summary;
isc_uint64_t lost;
memset(&summary, 0, sizeof(summary));
xmlTextWriterStartElement(writer, ISC_XMLCHAR "contexts");
RUNTIME_CHECK(isc_once_do(&once, initialize_action) == ISC_R_SUCCESS);
LOCK(&lock);
lost = totallost;
for (ctx = ISC_LIST_HEAD(contexts);
ctx != NULL;
ctx = ISC_LIST_NEXT(ctx, link)) {
renderctx(ctx, &summary, writer);
}
UNLOCK(&lock);
xmlTextWriterEndElement(writer); /* contexts */
xmlTextWriterStartElement(writer, ISC_XMLCHAR "summary");
xmlTextWriterStartElement(writer, ISC_XMLCHAR "TotalUse");
xmlTextWriterWriteFormatString(writer, "%" ISC_PRINT_QUADFORMAT "u",
summary.total);
xmlTextWriterEndElement(writer); /* TotalUse */
xmlTextWriterStartElement(writer, ISC_XMLCHAR "InUse");
xmlTextWriterWriteFormatString(writer, "%" ISC_PRINT_QUADFORMAT "u",
summary.inuse);
xmlTextWriterEndElement(writer); /* InUse */
xmlTextWriterStartElement(writer, ISC_XMLCHAR "BlockSize");
xmlTextWriterWriteFormatString(writer, "%" ISC_PRINT_QUADFORMAT "u",
summary.blocksize);
xmlTextWriterEndElement(writer); /* BlockSize */
xmlTextWriterStartElement(writer, ISC_XMLCHAR "ContextSize");
xmlTextWriterWriteFormatString(writer, "%" ISC_PRINT_QUADFORMAT "u",
summary.contextsize);
xmlTextWriterEndElement(writer); /* ContextSize */
xmlTextWriterStartElement(writer, ISC_XMLCHAR "Lost");
xmlTextWriterWriteFormatString(writer, "%" ISC_PRINT_QUADFORMAT "u",
lost);
xmlTextWriterEndElement(writer); /* Lost */
xmlTextWriterEndElement(writer); /* summary */
}
#endif /* HAVE_LIBXML2 */
#endif /* BIND9 */
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