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bind/lib/isc/mem.c
Artem Boldariev 3673abc53c Use restrict and const in isc_mempool_t 
This commit makes add restrict and const modifiers to some variables
to aid compiler to do its optimizations.
2021-07-09 15:58:02 +02:00

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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <errno.h>
#include <inttypes.h>
#include <limits.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <isc/align.h>
#include <isc/bind9.h>
#include <isc/hash.h>
#include <isc/magic.h>
#include <isc/mem.h>
#include <isc/mutex.h>
#include <isc/once.h>
#include <isc/print.h>
#include <isc/refcount.h>
#include <isc/strerr.h>
#include <isc/string.h>
#include <isc/types.h>
#include <isc/util.h>
#ifdef HAVE_LIBXML2
#include <libxml/xmlwriter.h>
#define ISC_XMLCHAR (const xmlChar *)
#endif /* HAVE_LIBXML2 */
#ifdef HAVE_JSON_C
#include <json_object.h>
#endif /* HAVE_JSON_C */
#if defined(HAVE_MALLOC_NP_H)
#include <malloc_np.h>
#elif defined(HAVE_JEMALLOC)
#include <jemalloc/jemalloc.h>
#if JEMALLOC_VERSION_MAJOR < 4
#define sdallocx(ptr, size, flags) dallocx(ptr, flags)
#endif /* JEMALLOC_VERSION_MAJOR < 4 */
#else
#include "jemalloc_shim.h"
#endif
#include "mem_p.h"
#define MCTXLOCK(m) LOCK(&m->lock)
#define MCTXUNLOCK(m) UNLOCK(&m->lock)
#ifndef ISC_MEM_DEBUGGING
#define ISC_MEM_DEBUGGING 0
#endif /* ifndef ISC_MEM_DEBUGGING */
unsigned int isc_mem_debugging = ISC_MEM_DEBUGGING;
unsigned int isc_mem_defaultflags = ISC_MEMFLAG_DEFAULT;
/*
* Constants.
*/
#define ALIGNMENT 8U /*%< must be a power of 2 */
#define ALIGNMENT_SIZE sizeof(size_info)
#define DEBUG_TABLE_COUNT 512U
#define STATS_BUCKETS 512U
#define STATS_BUCKET_SIZE 32U
/*
* Types.
*/
#if ISC_MEM_TRACKLINES
typedef struct debuglink debuglink_t;
struct debuglink {
ISC_LINK(debuglink_t) link;
const void *ptr;
size_t size;
const char *file;
unsigned int line;
};
typedef ISC_LIST(debuglink_t) debuglist_t;
#define FLARG_PASS , file, line
#define FLARG , const char *file, unsigned int line
#else /* if ISC_MEM_TRACKLINES */
#define FLARG_PASS
#define FLARG
#endif /* if ISC_MEM_TRACKLINES */
typedef struct element element;
struct element {
element *next;
};
struct stats {
atomic_size_t gets;
atomic_size_t totalgets;
};
typedef struct water {
isc_mem_water_t water;
void *water_arg;
size_t hi_water;
size_t lo_water;
} water_t;
#define MEM_MAGIC ISC_MAGIC('M', 'e', 'm', 'C')
#define VALID_CONTEXT(c) ISC_MAGIC_VALID(c, MEM_MAGIC)
/* List of all active memory contexts. */
static ISC_LIST(isc_mem_t) contexts;
static isc_once_t init_once = ISC_ONCE_INIT;
static isc_once_t shut_once = ISC_ONCE_INIT;
static isc_mutex_t contextslock;
/*%
* Total size of lost memory due to a bug of external library.
* Locked by the global lock.
*/
static uint64_t totallost;
struct isc_mem {
unsigned int magic;
unsigned int flags;
isc_mutex_t lock;
bool checkfree;
struct stats stats[STATS_BUCKETS + 1];
isc_refcount_t references;
char name[16];
atomic_size_t total;
atomic_size_t inuse;
atomic_size_t maxinuse;
atomic_size_t malloced;
atomic_size_t maxmalloced;
atomic_bool hi_called;
atomic_bool is_overmem;
atomic_uintptr_t water;
ISC_LIST(isc_mempool_t) pools;
unsigned int poolcnt;
#if ISC_MEM_TRACKLINES
debuglist_t *debuglist;
size_t debuglistcnt;
#endif /* if ISC_MEM_TRACKLINES */
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 */
unsigned int magic;
isc_mem_t *mctx; /*%< our memory context */
ISC_LINK(isc_mempool_t) link; /*%< next pool in this mem context */
element *items; /*%< low water item list */
size_t size; /*%< size of each item on this pool */
size_t allocated; /*%< # of items currently given out */
size_t freecount; /*%< # of items on reserved list */
size_t freemax; /*%< # of items allowed on free list */
size_t fillcount; /*%< # of items to fetch on each fill */
/*%< Stats only. */
size_t gets; /*%< # of requests to this pool */
/*%< Debugging only. */
char name[16]; /*%< printed name in stats reports */
};
/*
* Private Inline-able.
*/
#if !ISC_MEM_TRACKLINES
#define ADD_TRACE(a, b, c, d, e)
#define DELETE_TRACE(a, b, c, d, e)
#define ISC_MEMFUNC_SCOPE
#else /* if !ISC_MEM_TRACKLINES */
#define TRACE_OR_RECORD (ISC_MEM_DEBUGTRACE | ISC_MEM_DEBUGRECORD)
#define SHOULD_TRACE_OR_RECORD(ptr) \
(ISC_UNLIKELY((isc_mem_debugging & TRACE_OR_RECORD) != 0) && \
ptr != NULL)
#define ADD_TRACE(a, b, c, d, e) \
if (SHOULD_TRACE_OR_RECORD(b)) { \
add_trace_entry(a, b, c, d, e); \
}
#define DELETE_TRACE(a, b, c, d, e) \
if (SHOULD_TRACE_OR_RECORD(b)) { \
delete_trace_entry(a, b, c, d, e); \
}
static void
print_active(isc_mem_t *ctx, FILE *out);
#endif /* ISC_MEM_TRACKLINES */
static inline size_t
increment_malloced(isc_mem_t *ctx, size_t size) {
size_t malloced = atomic_fetch_add_relaxed(&ctx->malloced, size) + size;
size_t maxmalloced = atomic_load_relaxed(&ctx->maxmalloced);
if (malloced > maxmalloced) {
atomic_compare_exchange_strong(&ctx->maxmalloced, &maxmalloced,
malloced);
}
return (malloced);
}
static inline size_t
decrement_malloced(isc_mem_t *ctx, size_t size) {
size_t malloced = atomic_fetch_sub_relaxed(&ctx->malloced, size) - size;
return (malloced);
}
#if ISC_MEM_TRACKLINES
/*!
* mctx must not be locked.
*/
static void
add_trace_entry(isc_mem_t *mctx, const void *ptr, size_t size FLARG) {
debuglink_t *dl = NULL;
uint32_t hash;
uint32_t idx;
MCTXLOCK(mctx);
if ((isc_mem_debugging & ISC_MEM_DEBUGTRACE) != 0) {
fprintf(stderr, "add %p size %zu file %s line %u mctx %p\n",
ptr, size, file, line, mctx);
}
if (mctx->debuglist == NULL) {
goto unlock;
}
#ifdef __COVERITY__
/*
* Use simple conversion from pointer to hash to avoid
* tainting 'ptr' due to byte swap in isc_hash_function.
*/
hash = (uintptr_t)ptr >> 3;
#else
hash = isc_hash_function(&ptr, sizeof(ptr), true);
#endif
idx = hash % DEBUG_TABLE_COUNT;
dl = mallocx(sizeof(debuglink_t), 0);
INSIST(dl != NULL);
increment_malloced(mctx, sizeof(debuglink_t));
ISC_LINK_INIT(dl, link);
dl->ptr = ptr;
dl->size = size;
dl->file = file;
dl->line = line;
ISC_LIST_PREPEND(mctx->debuglist[idx], dl, link);
mctx->debuglistcnt++;
unlock:
MCTXUNLOCK(mctx);
}
static void
delete_trace_entry(isc_mem_t *mctx, const void *ptr, size_t size,
const char *file, unsigned int line) {
debuglink_t *dl = NULL;
uint32_t hash;
uint32_t idx;
MCTXLOCK(mctx);
if ((isc_mem_debugging & ISC_MEM_DEBUGTRACE) != 0) {
fprintf(stderr, "del %p size %zu file %s line %u mctx %p\n",
ptr, size, file, line, mctx);
}
if (mctx->debuglist == NULL) {
goto unlock;
}
#ifdef __COVERITY__
/*
* Use simple conversion from pointer to hash to avoid
* tainting 'ptr' due to byte swap in isc_hash_function.
*/
hash = (uintptr_t)ptr >> 3;
#else
hash = isc_hash_function(&ptr, sizeof(ptr), true);
#endif
idx = hash % DEBUG_TABLE_COUNT;
dl = ISC_LIST_HEAD(mctx->debuglist[idx]);
while (ISC_LIKELY(dl != NULL)) {
if (ISC_UNLIKELY(dl->ptr == ptr)) {
ISC_LIST_UNLINK(mctx->debuglist[idx], dl, link);
decrement_malloced(mctx, sizeof(*dl));
sdallocx(dl, sizeof(*dl), 0);
goto unlock;
}
dl = ISC_LIST_NEXT(dl, link);
}
/*
* If we get here, we didn't find the item on the list. We're
* screwed.
*/
INSIST(0);
ISC_UNREACHABLE();
unlock:
MCTXUNLOCK(mctx);
}
#endif /* ISC_MEM_TRACKLINES */
/*!
* 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 = mallocx(size, 0);
if (ISC_UNLIKELY((ctx->flags & ISC_MEMFLAG_FILL) != 0)) {
memset(ret, 0xbe, size); /* Mnemonic for "beef". */
}
return (ret);
}
/*!
* Perform a free, doing memory filling and overrun detection as necessary.
*/
/* coverity[+free : arg-1] */
static inline void
mem_put(isc_mem_t *ctx, void *mem, size_t size) {
if (ISC_UNLIKELY((ctx->flags & ISC_MEMFLAG_FILL) != 0)) {
memset(mem, 0xde, size); /* Mnemonic for "dead". */
}
sdallocx(mem, size, 0);
}
#define stats_bucket(ctx, size) \
((size / STATS_BUCKET_SIZE) >= STATS_BUCKETS \
? &ctx->stats[STATS_BUCKETS] \
: &ctx->stats[size / STATS_BUCKET_SIZE])
/*!
* Update internal counters after a memory get.
*/
static inline void
mem_getstats(isc_mem_t *ctx, size_t size) {
struct stats *stats = stats_bucket(ctx, size);
atomic_fetch_add_relaxed(&ctx->total, size);
atomic_fetch_add_release(&ctx->inuse, size);
atomic_fetch_add_relaxed(&stats->gets, 1);
atomic_fetch_add_relaxed(&stats->totalgets, 1);
increment_malloced(ctx, size);
}
/*!
* Update internal counters after a memory put.
*/
static inline void
mem_putstats(isc_mem_t *ctx, void *ptr, size_t size) {
struct stats *stats = stats_bucket(ctx, size);
UNUSED(ptr);
INSIST(atomic_fetch_sub_release(&ctx->inuse, size) >= size);
INSIST(atomic_fetch_sub_release(&stats->gets, 1) >= 1);
decrement_malloced(ctx, size);
}
/*
* Private.
*/
static void
mem_initialize(void) {
malloc_conf = "xmalloc:true,background_thread:true,metadata_thp:auto,"
"dirty_decay_ms:30000,muzzy_decay_ms:30000";
isc_mutex_init(&contextslock);
ISC_LIST_INIT(contexts);
totallost = 0;
}
void
isc__mem_initialize(void) {
RUNTIME_CHECK(isc_once_do(&init_once, mem_initialize) == ISC_R_SUCCESS);
}
static void
mem_shutdown(void) {
isc__mem_checkdestroyed();
isc_mutex_destroy(&contextslock);
}
void
isc__mem_shutdown(void) {
RUNTIME_CHECK(isc_once_do(&shut_once, mem_shutdown) == ISC_R_SUCCESS);
}
static void
mem_create(isc_mem_t **ctxp, unsigned int flags) {
isc_mem_t *ctx = NULL;
REQUIRE(ctxp != NULL && *ctxp == NULL);
ctx = mallocx(sizeof(*ctx), 0);
*ctx = (isc_mem_t){
.magic = MEM_MAGIC,
.flags = flags,
.checkfree = true,
};
isc_mutex_init(&ctx->lock);
isc_refcount_init(&ctx->references, 1);
atomic_init(&ctx->total, 0);
atomic_init(&ctx->inuse, 0);
atomic_init(&ctx->maxinuse, 0);
atomic_init(&ctx->malloced, sizeof(*ctx));
atomic_init(&ctx->maxmalloced, sizeof(*ctx));
atomic_init(&ctx->water, (uintptr_t)NULL);
atomic_init(&ctx->hi_called, false);
atomic_init(&ctx->is_overmem, false);
for (size_t i = 0; i < STATS_BUCKETS + 1; i++) {
atomic_init(&ctx->stats[i].gets, 0);
atomic_init(&ctx->stats[i].totalgets, 0);
}
ISC_LIST_INIT(ctx->pools);
#if ISC_MEM_TRACKLINES
if (ISC_UNLIKELY((isc_mem_debugging & ISC_MEM_DEBUGRECORD) != 0)) {
unsigned int i;
ctx->debuglist =
mallocx((DEBUG_TABLE_COUNT * sizeof(debuglist_t)), 0);
for (i = 0; i < DEBUG_TABLE_COUNT; i++) {
ISC_LIST_INIT(ctx->debuglist[i]);
}
increment_malloced(ctx,
DEBUG_TABLE_COUNT * sizeof(debuglist_t));
}
#endif /* if ISC_MEM_TRACKLINES */
LOCK(&contextslock);
ISC_LIST_INITANDAPPEND(contexts, ctx, link);
UNLOCK(&contextslock);
*ctxp = ctx;
}
/*
* Public.
*/
static void
destroy(isc_mem_t *ctx) {
unsigned int i;
size_t malloced;
water_t *water;
LOCK(&contextslock);
ISC_LIST_UNLINK(contexts, ctx, link);
totallost += isc_mem_inuse(ctx);
UNLOCK(&contextslock);
water = (water_t *)atomic_exchange(&ctx->water, (uintptr_t)NULL);
if (water != NULL) {
sdallocx(water, sizeof(*water), 0);
decrement_malloced(ctx, sizeof(water_t));
}
ctx->magic = 0;
INSIST(ISC_LIST_EMPTY(ctx->pools));
#if ISC_MEM_TRACKLINES
if (ISC_UNLIKELY(ctx->debuglist != NULL)) {
debuglink_t *dl;
for (i = 0; i < DEBUG_TABLE_COUNT; i++) {
for (dl = ISC_LIST_HEAD(ctx->debuglist[i]); dl != NULL;
dl = ISC_LIST_HEAD(ctx->debuglist[i]))
{
if (ctx->checkfree && dl->ptr != NULL) {
print_active(ctx, stderr);
}
INSIST(!ctx->checkfree || dl->ptr == NULL);
ISC_LIST_UNLINK(ctx->debuglist[i], dl, link);
sdallocx(dl, sizeof(*dl), 0);
decrement_malloced(ctx, sizeof(*dl));
}
}
sdallocx(ctx->debuglist,
(DEBUG_TABLE_COUNT * sizeof(debuglist_t)), 0);
decrement_malloced(ctx,
DEBUG_TABLE_COUNT * sizeof(debuglist_t));
}
#endif /* if ISC_MEM_TRACKLINES */
if (ctx->checkfree) {
for (i = 0; i <= STATS_BUCKETS; i++) {
struct stats *stats = &ctx->stats[i];
size_t gets = atomic_load_acquire(&stats->gets);
if (gets != 0U) {
fprintf(stderr,
"Failing assertion due to probable "
"leaked memory in context %p (\"%s\") "
"(stats[%u].gets == %zu).\n",
ctx, ctx->name, i, gets);
#if ISC_MEM_TRACKLINES
print_active(ctx, stderr);
#endif /* if ISC_MEM_TRACKLINES */
INSIST(gets == 0U);
}
}
}
isc_mutex_destroy(&ctx->lock);
malloced = decrement_malloced(ctx, sizeof(*ctx));
if (ctx->checkfree) {
INSIST(malloced == 0);
}
sdallocx(ctx, sizeof(*ctx), 0);
}
void
isc_mem_attach(isc_mem_t *source, isc_mem_t **targetp) {
REQUIRE(VALID_CONTEXT(source));
REQUIRE(targetp != NULL && *targetp == NULL);
isc_refcount_increment(&source->references);
*targetp = source;
}
void
isc__mem_detach(isc_mem_t **ctxp FLARG) {
isc_mem_t *ctx = NULL;
REQUIRE(ctxp != NULL && VALID_CONTEXT(*ctxp));
ctx = *ctxp;
*ctxp = NULL;
if (isc_refcount_decrement(&ctx->references) == 1) {
isc_refcount_destroy(&ctx->references);
#if ISC_MEM_TRACKLINES
if ((isc_mem_debugging & ISC_MEM_DEBUGTRACE) != 0) {
fprintf(stderr, "destroy mctx %p file %s line %u\n",
ctx, file, line);
}
#endif
destroy(ctx);
}
}
/*
* 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);
*/
void
isc__mem_putanddetach(isc_mem_t **ctxp, void *ptr, size_t size FLARG) {
isc_mem_t *ctx = NULL;
REQUIRE(ctxp != NULL && VALID_CONTEXT(*ctxp));
REQUIRE(ptr != NULL);
REQUIRE(size > 0);
ctx = *ctxp;
*ctxp = NULL;
DELETE_TRACE(ctx, ptr, size, file, line);
mem_putstats(ctx, ptr, size);
mem_put(ctx, ptr, size);
if (isc_refcount_decrement(&ctx->references) == 1) {
isc_refcount_destroy(&ctx->references);
destroy(ctx);
}
}
void
isc__mem_destroy(isc_mem_t **ctxp FLARG) {
isc_mem_t *ctx = NULL;
/*
* This routine provides legacy support for callers who use mctxs
* without attaching/detaching.
*/
REQUIRE(ctxp != NULL && VALID_CONTEXT(*ctxp));
ctx = *ctxp;
*ctxp = NULL;
#if ISC_MEM_TRACKLINES
if ((isc_mem_debugging & ISC_MEM_DEBUGTRACE) != 0) {
fprintf(stderr, "destroy mctx %p file %s line %u\n", ctx, file,
line);
}
if (isc_refcount_decrement(&ctx->references) > 1) {
print_active(ctx, stderr);
}
#else /* if ISC_MEM_TRACKLINES */
isc_refcount_decrementz(&ctx->references);
#endif /* if ISC_MEM_TRACKLINES */
isc_refcount_destroy(&ctx->references);
destroy(ctx);
*ctxp = NULL;
}
#define CALL_HI_WATER(ctx) \
{ \
water_t *water = (water_t *)atomic_load_relaxed(&ctx->water); \
if (water != NULL && hi_water(ctx, water)) { \
(water->water)(water->water_arg, ISC_MEM_HIWATER); \
} \
}
#define CALL_LO_WATER(ctx) \
{ \
water_t *water = (water_t *)atomic_load_relaxed(&ctx->water); \
if ((water != NULL) && lo_water(ctx, water)) { \
(water->water)(water->water_arg, ISC_MEM_LOWATER); \
} \
}
static inline bool
hi_water(isc_mem_t *ctx, water_t *water) {
size_t inuse;
size_t maxinuse;
if (water->hi_water == 0) {
return (false);
}
inuse = atomic_load_acquire(&ctx->inuse);
if (inuse <= water->hi_water) {
return (false);
}
maxinuse = atomic_load_acquire(&ctx->maxinuse);
if (inuse > maxinuse) {
(void)atomic_compare_exchange_strong(&ctx->maxinuse, &maxinuse,
inuse);
if ((isc_mem_debugging & ISC_MEM_DEBUGUSAGE) != 0) {
fprintf(stderr, "maxinuse = %lu\n",
(unsigned long)inuse);
}
}
if (atomic_load_acquire(&ctx->hi_called)) {
return (false);
}
/* We are over water (for the first time) */
atomic_store_release(&ctx->is_overmem, true);
return (true);
}
static inline bool
lo_water(isc_mem_t *ctx, water_t *water) {
size_t inuse;
if (water->lo_water == 0) {
return (false);
}
inuse = atomic_load_acquire(&ctx->inuse);
if (inuse >= water->lo_water) {
return (false);
}
if (!atomic_load_acquire(&ctx->hi_called)) {
return (false);
}
/* We are no longer overmem */
atomic_store_release(&ctx->is_overmem, false);
return (true);
}
void *
isc__mem_get(isc_mem_t *ctx, size_t size FLARG) {
void *ptr = NULL;
REQUIRE(VALID_CONTEXT(ctx));
if (ISC_LIKELY(size != 0)) {
ptr = mem_get(ctx, size);
}
mem_getstats(ctx, size);
ADD_TRACE(ctx, ptr, size, file, line);
CALL_HI_WATER(ctx);
return (ptr);
}
void
isc__mem_put(isc_mem_t *ctx, void *ptr, size_t size FLARG) {
REQUIRE(VALID_CONTEXT(ctx));
REQUIRE(ISC_LIKELY(ptr != NULL && size != 0) ||
ISC_UNLIKELY(ptr == NULL && size == 0));
DELETE_TRACE(ctx, ptr, size, file, line);
mem_putstats(ctx, ptr, size);
if (ISC_LIKELY(ptr != NULL)) {
mem_put(ctx, ptr, size);
}
CALL_LO_WATER(ctx);
}
void
isc_mem_waterack(isc_mem_t *ctx, int flag) {
REQUIRE(VALID_CONTEXT(ctx));
if (flag == ISC_MEM_LOWATER) {
atomic_store(&ctx->hi_called, false);
} else if (flag == ISC_MEM_HIWATER) {
atomic_store(&ctx->hi_called, true);
}
}
#if ISC_MEM_TRACKLINES
static void
print_active(isc_mem_t *mctx, FILE *out) {
if (mctx->debuglist != NULL) {
debuglink_t *dl;
unsigned int i;
bool found;
fprintf(out, "Dump of all outstanding memory "
"allocations:\n");
found = false;
for (i = 0; i < DEBUG_TABLE_COUNT; i++) {
dl = ISC_LIST_HEAD(mctx->debuglist[i]);
if (dl != NULL) {
found = true;
}
while (dl != NULL) {
if (dl->ptr != NULL) {
fprintf(out,
"\tptr %p size %zu "
"file %s "
"line %u\n",
dl->ptr, dl->size, dl->file,
dl->line);
}
dl = ISC_LIST_NEXT(dl, link);
}
}
if (!found) {
fprintf(out, "\tNone.\n");
}
}
}
#endif /* if ISC_MEM_TRACKLINES */
/*
* Print the stats[] on the stream "out" with suitable formatting.
*/
void
isc_mem_stats(isc_mem_t *ctx, FILE *out) {
isc_mempool_t *pool = NULL;
REQUIRE(VALID_CONTEXT(ctx));
MCTXLOCK(ctx);
for (size_t i = 0; i <= STATS_BUCKETS; i++) {
size_t totalgets;
size_t gets;
struct stats *stats = &ctx->stats[i];
totalgets = atomic_load_acquire(&stats->totalgets);
gets = atomic_load_acquire(&stats->gets);
if (totalgets != 0U && gets != 0U) {
fprintf(out, "%s%5zu: %11zu gets, %11zu rem",
(i == STATS_BUCKETS) ? ">=" : " ", i,
totalgets, gets);
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, "[Pool statistics]\n");
fprintf(out, "%15s %10s %10s %10s %10s %10s %10s %1s\n", "name",
"size", "allocated", "freecount", "freemax",
"fillcount", "gets", "L");
}
while (pool != NULL) {
fprintf(out,
"%15s %10zu %10zu %10zu %10zu %10zu %10zu %10zu %s\n",
pool->name, pool->size, (size_t)0, pool->allocated,
pool->freecount, pool->freemax, pool->fillcount,
pool->gets, "N");
pool = ISC_LIST_NEXT(pool, link);
}
#if ISC_MEM_TRACKLINES
print_active(ctx, out);
#endif /* if ISC_MEM_TRACKLINES */
MCTXUNLOCK(ctx);
}
void *
isc__mem_allocate(isc_mem_t *ctx, size_t size FLARG) {
void *ptr = NULL;
REQUIRE(VALID_CONTEXT(ctx));
if (ISC_LIKELY(size != 0)) {
ptr = mem_get(ctx, size);
/* Recalculate the real allocated size */
size = sallocx(ptr, 0);
}
mem_getstats(ctx, size);
ADD_TRACE(ctx, ptr, size, file, line);
CALL_HI_WATER(ctx);
return (ptr);
}
void *
isc__mem_reallocate(isc_mem_t *ctx, void *old_ptr, size_t new_size FLARG) {
void *new_ptr = NULL;
REQUIRE(VALID_CONTEXT(ctx));
if (ISC_UNLIKELY(old_ptr == NULL)) {
new_ptr = isc__mem_allocate(ctx, new_size FLARG_PASS);
} else if (ISC_UNLIKELY(new_size == 0)) {
isc__mem_free(ctx, old_ptr FLARG_PASS);
} else {
size_t old_size = sallocx(old_ptr, 0);
DELETE_TRACE(ctx, old_ptr, old_size, file, line);
mem_putstats(ctx, old_ptr, old_size);
new_ptr = rallocx(old_ptr, new_size, 0);
if (ISC_UNLIKELY((ctx->flags & ISC_MEMFLAG_FILL) != 0)) {
ssize_t diff_size = new_size - old_size;
void *diff_ptr = (uint8_t *)new_ptr + old_size;
if (diff_size >= 0) {
/* Mnemonic for "beef". */
memset(diff_ptr, 0xbe, diff_size);
}
}
/* Recalculate the real allocated size */
new_size = sallocx(new_ptr, 0);
mem_getstats(ctx, new_size);
ADD_TRACE(ctx, new_ptr, new_size, file, line);
/*
* We want to postpone the call to water in edge case
* where the realloc will exactly hit on the boundary of
* the water and we would call water twice.
*/
CALL_LO_WATER(ctx);
CALL_HI_WATER(ctx);
}
return (new_ptr);
}
void
isc__mem_free(isc_mem_t *ctx, void *ptr FLARG) {
size_t size = 0;
REQUIRE(VALID_CONTEXT(ctx));
if (ISC_LIKELY(ptr != NULL)) {
size = sallocx(ptr, 0);
}
DELETE_TRACE(ctx, ptr, size, file, line);
mem_putstats(ctx, ptr, size);
if (ISC_LIKELY(ptr != NULL)) {
mem_put(ctx, ptr, size);
}
CALL_LO_WATER(ctx);
}
/*
* Other useful things.
*/
char *
isc__mem_strdup(isc_mem_t *mctx, const char *s FLARG) {
size_t len;
char *ns = NULL;
REQUIRE(VALID_CONTEXT(mctx));
REQUIRE(s != NULL);
len = strlen(s) + 1;
ns = isc__mem_allocate(mctx, len FLARG_PASS);
strlcpy(ns, s, len);
return (ns);
}
char *
isc__mem_strndup(isc_mem_t *mctx, const char *s, size_t size FLARG) {
size_t len;
char *ns = NULL;
REQUIRE(VALID_CONTEXT(mctx));
REQUIRE(s != NULL);
REQUIRE(size != 0);
len = strlen(s) + 1;
if (len > size) {
len = size;
}
ns = isc__mem_allocate(mctx, len FLARG_PASS);
strlcpy(ns, s, len);
return (ns);
}
void
isc_mem_setdestroycheck(isc_mem_t *ctx, bool flag) {
REQUIRE(VALID_CONTEXT(ctx));
MCTXLOCK(ctx);
ctx->checkfree = flag;
MCTXUNLOCK(ctx);
}
size_t
isc_mem_inuse(isc_mem_t *ctx) {
REQUIRE(VALID_CONTEXT(ctx));
return (atomic_load_acquire(&ctx->inuse));
}
size_t
isc_mem_maxinuse(isc_mem_t *ctx) {
REQUIRE(VALID_CONTEXT(ctx));
return (atomic_load_acquire(&ctx->maxinuse));
}
size_t
isc_mem_total(isc_mem_t *ctx) {
REQUIRE(VALID_CONTEXT(ctx));
return (atomic_load_acquire(&ctx->total));
}
size_t
isc_mem_malloced(isc_mem_t *ctx) {
REQUIRE(VALID_CONTEXT(ctx));
return (atomic_load_acquire(&ctx->malloced));
}
size_t
isc_mem_maxmalloced(isc_mem_t *ctx) {
REQUIRE(VALID_CONTEXT(ctx));
return (atomic_load_acquire(&ctx->maxmalloced));
}
void
isc_mem_setwater(isc_mem_t *ctx, isc_mem_water_t water, void *water_arg,
size_t hiwater, size_t lowater) {
water_t *oldwater;
water_t *newwater = NULL;
REQUIRE(VALID_CONTEXT(ctx));
REQUIRE(hiwater >= lowater);
if (water != NULL) {
newwater = mallocx(sizeof(*newwater), 0);
increment_malloced(ctx, sizeof(*newwater));
*newwater = (water_t){
.water = water,
.water_arg = water_arg,
.hi_water = hiwater,
.lo_water = lowater,
};
}
oldwater = (water_t *)atomic_exchange(&ctx->water, (uintptr_t)newwater);
if (oldwater == NULL) {
return;
}
INSIST(oldwater->water != NULL);
if (atomic_load_acquire(&ctx->hi_called) &&
(oldwater->water != water || oldwater->water_arg != water_arg ||
atomic_load_acquire(&ctx->inuse) < lowater || lowater == 0U))
{
(oldwater->water)(oldwater->water_arg, ISC_MEM_LOWATER);
}
decrement_malloced(ctx, sizeof(*oldwater));
sdallocx(oldwater, sizeof(*oldwater), 0);
}
bool
isc_mem_isovermem(isc_mem_t *ctx) {
REQUIRE(VALID_CONTEXT(ctx));
return (atomic_load_relaxed(&ctx->is_overmem));
}
void
isc_mem_setname(isc_mem_t *ctx, const char *name) {
REQUIRE(VALID_CONTEXT(ctx));
LOCK(&ctx->lock);
strlcpy(ctx->name, name, sizeof(ctx->name));
UNLOCK(&ctx->lock);
}
const char *
isc_mem_getname(isc_mem_t *ctx) {
REQUIRE(VALID_CONTEXT(ctx));
if (ctx->name[0] == 0) {
return ("");
}
return (ctx->name);
}
/*
* Memory pool stuff
*/
void
isc__mempool_create(isc_mem_t *restrict mctx, const size_t element_size,
isc_mempool_t **restrict mpctxp FLARG) {
isc_mempool_t *restrict mpctx = NULL;
size_t size = element_size;
REQUIRE(VALID_CONTEXT(mctx));
REQUIRE(size > 0U);
REQUIRE(mpctxp != NULL && *mpctxp == NULL);
/*
* Mempools are stored as a linked list of element.
*/
if (size < sizeof(element)) {
size = sizeof(element);
}
/*
* Allocate space for this pool, initialize values, and if all
* works well, attach to the memory context.
*/
mpctx = isc_mem_get(mctx, sizeof(isc_mempool_t));
*mpctx = (isc_mempool_t){
.magic = MEMPOOL_MAGIC,
.mctx = mctx,
.size = size,
.freemax = 1,
.fillcount = 1,
};
#if ISC_MEM_TRACKLINES
if ((isc_mem_debugging & ISC_MEM_DEBUGTRACE) != 0) {
fprintf(stderr, "create pool %p file %s line %u mctx %p\n",
mpctx, file, line, mctx);
}
#endif /* ISC_MEM_TRACKLINES */
*mpctxp = (isc_mempool_t *)mpctx;
MCTXLOCK(mctx);
ISC_LIST_INITANDAPPEND(mctx->pools, mpctx, link);
mctx->poolcnt++;
MCTXUNLOCK(mctx);
}
void
isc_mempool_setname(isc_mempool_t *restrict mpctx, const char *name) {
REQUIRE(VALID_MEMPOOL(mpctx));
REQUIRE(name != NULL);
strlcpy(mpctx->name, name, sizeof(mpctx->name));
}
void
isc__mempool_destroy(isc_mempool_t **restrict mpctxp FLARG) {
isc_mempool_t *restrict mpctx = NULL;
isc_mem_t *mctx = NULL;
element *restrict item = NULL;
REQUIRE(mpctxp != NULL);
REQUIRE(VALID_MEMPOOL(*mpctxp));
mpctx = *mpctxp;
*mpctxp = NULL;
mctx = mpctx->mctx;
#if ISC_MEM_TRACKLINES
if ((isc_mem_debugging & ISC_MEM_DEBUGTRACE) != 0) {
fprintf(stderr, "destroy pool %p file %s line %u mctx %p\n",
mpctx, file, line, mctx);
}
#endif
if (mpctx->allocated > 0) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"isc_mempool_destroy(): mempool %s "
"leaked memory",
mpctx->name);
}
REQUIRE(mpctx->allocated == 0);
/*
* Return any items on the free list
*/
while (mpctx->items != NULL) {
INSIST(mpctx->freecount > 0);
mpctx->freecount--;
item = mpctx->items;
mpctx->items = item->next;
mem_putstats(mctx, item, mpctx->size);
mem_put(mctx, item, mpctx->size);
}
/*
* Remove our linked list entry from the memory context.
*/
MCTXLOCK(mctx);
ISC_LIST_UNLINK(mctx->pools, mpctx, link);
mctx->poolcnt--;
MCTXUNLOCK(mctx);
mpctx->magic = 0;
isc_mem_put(mpctx->mctx, mpctx, sizeof(isc_mempool_t));
}
#if __SANITIZE_ADDRESS__
void *
isc__mempool_get(isc_mempool_t *restrict mpctx FLARG) {
REQUIRE(VALID_MEMPOOL(mpctx));
mpctx->allocated++;
mpctx->gets++;
return (isc__mem_get(mpctx->mctx, mpctx->size FLARG_PASS));
}
void
isc__mempool_put(isc_mempool_t *restrict mpctx, void *mem FLARG) {
REQUIRE(VALID_MEMPOOL(mpctx));
REQUIRE(mem != NULL);
mpctx->allocated--;
isc__mem_put(mpctx->mctx, mem, mpctx->size FLARG_PASS);
}
#else /* __SANITIZE_ADDRESS__ */
void *
isc__mempool_get(isc_mempool_t *restrict mpctx FLARG) {
element *restrict item = NULL;
REQUIRE(VALID_MEMPOOL(mpctx));
mpctx->allocated++;
if (ISC_UNLIKELY(mpctx->items == NULL)) {
isc_mem_t *mctx = mpctx->mctx;
const size_t fillcount = mpctx->fillcount;
/*
* We need to dip into the well. Lock the memory
* context here and fill up our free list.
*/
for (size_t i = 0; i < fillcount; i++) {
item = mem_get(mctx, mpctx->size);
mem_getstats(mctx, mpctx->size);
item->next = mpctx->items;
mpctx->items = item;
mpctx->freecount++;
}
}
item = mpctx->items;
INSIST(item != NULL);
mpctx->items = item->next;
INSIST(mpctx->freecount > 0);
mpctx->freecount--;
mpctx->gets++;
ADD_TRACE(mpctx->mctx, item, mpctx->size, file, line);
return (item);
}
/* coverity[+free : arg-1] */
void
isc__mempool_put(isc_mempool_t *restrict mpctx, void *mem FLARG) {
element *restrict item = NULL;
REQUIRE(VALID_MEMPOOL(mpctx));
REQUIRE(mem != NULL);
isc_mem_t *mctx = mpctx->mctx;
const size_t freecount = mpctx->freecount;
const size_t freemax = mpctx->freemax;
INSIST(mpctx->allocated > 0);
mpctx->allocated--;
DELETE_TRACE(mctx, mem, mpctx->size, file, line);
/*
* If our free list is full, return this to the mctx directly.
*/
if (freecount >= freemax) {
mem_putstats(mctx, mem, mpctx->size);
mem_put(mctx, mem, mpctx->size);
return;
}
/*
* Otherwise, attach it to our free list and bump the counter.
*/
item = (element *)mem;
item->next = mpctx->items;
mpctx->items = item;
mpctx->freecount++;
}
#endif /* __SANITIZE_ADDRESS__ */
/*
* Quotas
*/
void
isc_mempool_setfreemax(isc_mempool_t *restrict mpctx,
const unsigned int limit) {
REQUIRE(VALID_MEMPOOL(mpctx));
mpctx->freemax = limit;
}
unsigned int
isc_mempool_getfreemax(isc_mempool_t *restrict mpctx) {
REQUIRE(VALID_MEMPOOL(mpctx));
return (mpctx->freemax);
}
unsigned int
isc_mempool_getfreecount(isc_mempool_t *restrict mpctx) {
REQUIRE(VALID_MEMPOOL(mpctx));
return (mpctx->freecount);
}
unsigned int
isc_mempool_getallocated(isc_mempool_t *restrict mpctx) {
REQUIRE(VALID_MEMPOOL(mpctx));
return (mpctx->allocated);
}
void
isc_mempool_setfillcount(isc_mempool_t *restrict mpctx,
unsigned int const limit) {
REQUIRE(VALID_MEMPOOL(mpctx));
REQUIRE(limit > 0);
mpctx->fillcount = limit;
}
unsigned int
isc_mempool_getfillcount(isc_mempool_t *restrict mpctx) {
REQUIRE(VALID_MEMPOOL(mpctx));
return (mpctx->fillcount);
}
/*
* Requires contextslock to be held by caller.
*/
#if ISC_MEM_TRACKLINES
static void
print_contexts(FILE *file) {
isc_mem_t *ctx;
for (ctx = ISC_LIST_HEAD(contexts); ctx != NULL;
ctx = ISC_LIST_NEXT(ctx, link)) {
fprintf(file, "context: %p (%s): %" PRIuFAST32 " references\n",
ctx, ctx->name[0] == 0 ? "<unknown>" : ctx->name,
isc_refcount_current(&ctx->references));
print_active(ctx, file);
}
fflush(file);
}
#endif
static atomic_uintptr_t checkdestroyed = ATOMIC_VAR_INIT(0);
void
isc_mem_checkdestroyed(FILE *file) {
atomic_store_release(&checkdestroyed, (uintptr_t)file);
}
void
isc__mem_checkdestroyed(void) {
FILE *file = (FILE *)atomic_load_acquire(&checkdestroyed);
if (file == NULL) {
return;
}
LOCK(&contextslock);
if (!ISC_LIST_EMPTY(contexts)) {
#if ISC_MEM_TRACKLINES
if (ISC_UNLIKELY((isc_mem_debugging & TRACE_OR_RECORD) != 0)) {
print_contexts(file);
}
#endif /* if ISC_MEM_TRACKLINES */
INSIST(0);
ISC_UNREACHABLE();
}
UNLOCK(&contextslock);
}
unsigned int
isc_mem_references(isc_mem_t *ctx) {
return (isc_refcount_current(&ctx->references));
}
typedef struct summarystat {
uint64_t total;
uint64_t inuse;
uint64_t malloced;
uint64_t contextsize;
} summarystat_t;
#ifdef HAVE_LIBXML2
#define TRY0(a) \
do { \
xmlrc = (a); \
if (xmlrc < 0) \
goto error; \
} while (0)
static int
xml_renderctx(isc_mem_t *ctx, summarystat_t *summary, xmlTextWriterPtr writer) {
REQUIRE(VALID_CONTEXT(ctx));
int xmlrc;
water_t *water;
MCTXLOCK(ctx);
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "context"));
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "id"));
TRY0(xmlTextWriterWriteFormatString(writer, "%p", ctx));
TRY0(xmlTextWriterEndElement(writer)); /* id */
if (ctx->name[0] != 0) {
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "name"));
TRY0(xmlTextWriterWriteFormatString(writer, "%s", ctx->name));
TRY0(xmlTextWriterEndElement(writer)); /* name */
}
summary->contextsize += sizeof(*ctx);
#if ISC_MEM_TRACKLINES
if (ctx->debuglist != NULL) {
summary->contextsize += DEBUG_TABLE_COUNT *
sizeof(debuglist_t) +
ctx->debuglistcnt * sizeof(debuglink_t);
}
#endif /* if ISC_MEM_TRACKLINES */
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "references"));
TRY0(xmlTextWriterWriteFormatString(
writer, "%" PRIuFAST32,
isc_refcount_current(&ctx->references)));
TRY0(xmlTextWriterEndElement(writer)); /* references */
summary->total += isc_mem_total(ctx);
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "total"));
TRY0(xmlTextWriterWriteFormatString(writer, "%" PRIu64 "",
(uint64_t)isc_mem_total(ctx)));
TRY0(xmlTextWriterEndElement(writer)); /* total */
summary->inuse += isc_mem_inuse(ctx);
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "inuse"));
TRY0(xmlTextWriterWriteFormatString(writer, "%" PRIu64 "",
(uint64_t)isc_mem_inuse(ctx)));
TRY0(xmlTextWriterEndElement(writer)); /* inuse */
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "maxinuse"));
TRY0(xmlTextWriterWriteFormatString(writer, "%" PRIu64 "",
(uint64_t)isc_mem_maxinuse(ctx)));
TRY0(xmlTextWriterEndElement(writer)); /* maxinuse */
summary->malloced += isc_mem_malloced(ctx);
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "malloced"));
TRY0(xmlTextWriterWriteFormatString(writer, "%" PRIu64 "",
(uint64_t)isc_mem_malloced(ctx)));
TRY0(xmlTextWriterEndElement(writer)); /* malloced */
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "maxmalloced"));
TRY0(xmlTextWriterWriteFormatString(
writer, "%" PRIu64 "", (uint64_t)isc_mem_maxmalloced(ctx)));
TRY0(xmlTextWriterEndElement(writer)); /* maxmalloced */
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "pools"));
TRY0(xmlTextWriterWriteFormatString(writer, "%u", ctx->poolcnt));
TRY0(xmlTextWriterEndElement(writer)); /* pools */
summary->contextsize += ctx->poolcnt * sizeof(isc_mempool_t);
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "hiwater"));
water = (water_t *)atomic_load_relaxed(&ctx->water);
TRY0(xmlTextWriterWriteFormatString(
writer, "%" PRIu64 "",
(water != NULL) ? (uint64_t)water->hi_water : 0));
TRY0(xmlTextWriterEndElement(writer)); /* hiwater */
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "lowater"));
TRY0(xmlTextWriterWriteFormatString(
writer, "%" PRIu64 "",
(water != NULL) ? (uint64_t)water->lo_water : 0));
TRY0(xmlTextWriterEndElement(writer)); /* lowater */
TRY0(xmlTextWriterEndElement(writer)); /* context */
error:
MCTXUNLOCK(ctx);
return (xmlrc);
}
int
isc_mem_renderxml(void *writer0) {
isc_mem_t *ctx;
summarystat_t summary = { 0 };
uint64_t lost;
int xmlrc;
xmlTextWriterPtr writer = (xmlTextWriterPtr)writer0;
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "contexts"));
LOCK(&contextslock);
lost = totallost;
for (ctx = ISC_LIST_HEAD(contexts); ctx != NULL;
ctx = ISC_LIST_NEXT(ctx, link)) {
xmlrc = xml_renderctx(ctx, &summary, writer);
if (xmlrc < 0) {
UNLOCK(&contextslock);
goto error;
}
}
UNLOCK(&contextslock);
TRY0(xmlTextWriterEndElement(writer)); /* contexts */
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "summary"));
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "TotalUse"));
TRY0(xmlTextWriterWriteFormatString(writer, "%" PRIu64 "",
summary.total));
TRY0(xmlTextWriterEndElement(writer)); /* TotalUse */
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "InUse"));
TRY0(xmlTextWriterWriteFormatString(writer, "%" PRIu64 "",
summary.inuse));
TRY0(xmlTextWriterEndElement(writer)); /* InUse */
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "Malloced"));
TRY0(xmlTextWriterWriteFormatString(writer, "%" PRIu64 "",
summary.malloced));
TRY0(xmlTextWriterEndElement(writer)); /* InUse */
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "ContextSize"));
TRY0(xmlTextWriterWriteFormatString(writer, "%" PRIu64 "",
summary.contextsize));
TRY0(xmlTextWriterEndElement(writer)); /* ContextSize */
TRY0(xmlTextWriterStartElement(writer, ISC_XMLCHAR "Lost"));
TRY0(xmlTextWriterWriteFormatString(writer, "%" PRIu64 "", lost));
TRY0(xmlTextWriterEndElement(writer)); /* Lost */
TRY0(xmlTextWriterEndElement(writer)); /* summary */
error:
return (xmlrc);
}
#endif /* HAVE_LIBXML2 */
#ifdef HAVE_JSON_C
#define CHECKMEM(m) RUNTIME_CHECK(m != NULL)
static isc_result_t
json_renderctx(isc_mem_t *ctx, summarystat_t *summary, json_object *array) {
REQUIRE(VALID_CONTEXT(ctx));
REQUIRE(summary != NULL);
REQUIRE(array != NULL);
json_object *ctxobj, *obj;
char buf[1024];
water_t *water;
MCTXLOCK(ctx);
summary->contextsize += sizeof(*ctx);
summary->total += isc_mem_total(ctx);
summary->inuse += isc_mem_inuse(ctx);
summary->malloced += isc_mem_malloced(ctx);
#if ISC_MEM_TRACKLINES
if (ctx->debuglist != NULL) {
summary->contextsize += DEBUG_TABLE_COUNT *
sizeof(debuglist_t) +
ctx->debuglistcnt * sizeof(debuglink_t);
}
#endif /* if ISC_MEM_TRACKLINES */
ctxobj = json_object_new_object();
CHECKMEM(ctxobj);
snprintf(buf, sizeof(buf), "%p", ctx);
obj = json_object_new_string(buf);
CHECKMEM(obj);
json_object_object_add(ctxobj, "id", obj);
if (ctx->name[0] != 0) {
obj = json_object_new_string(ctx->name);
CHECKMEM(obj);
json_object_object_add(ctxobj, "name", obj);
}
obj = json_object_new_int64(isc_refcount_current(&ctx->references));
CHECKMEM(obj);
json_object_object_add(ctxobj, "references", obj);
obj = json_object_new_int64(isc_mem_total(ctx));
CHECKMEM(obj);
json_object_object_add(ctxobj, "total", obj);
obj = json_object_new_int64(isc_mem_inuse(ctx));
CHECKMEM(obj);
json_object_object_add(ctxobj, "inuse", obj);
obj = json_object_new_int64(isc_mem_maxinuse(ctx));
CHECKMEM(obj);
json_object_object_add(ctxobj, "maxinuse", obj);
obj = json_object_new_int64(isc_mem_malloced(ctx));
CHECKMEM(obj);
json_object_object_add(ctxobj, "malloced", obj);
obj = json_object_new_int64(isc_mem_maxmalloced(ctx));
CHECKMEM(obj);
json_object_object_add(ctxobj, "maxmalloced", obj);
obj = json_object_new_int64(ctx->poolcnt);
CHECKMEM(obj);
json_object_object_add(ctxobj, "pools", obj);
summary->contextsize += ctx->poolcnt * sizeof(isc_mempool_t);
water = (water_t *)atomic_load_relaxed(&ctx->water);
obj = json_object_new_int64((water != NULL) ? water->hi_water : 0);
CHECKMEM(obj);
json_object_object_add(ctxobj, "hiwater", obj);
obj = json_object_new_int64((water != NULL) ? water->lo_water : 0);
CHECKMEM(obj);
json_object_object_add(ctxobj, "lowater", obj);
MCTXUNLOCK(ctx);
json_object_array_add(array, ctxobj);
return (ISC_R_SUCCESS);
}
isc_result_t
isc_mem_renderjson(void *memobj0) {
isc_result_t result = ISC_R_SUCCESS;
isc_mem_t *ctx;
summarystat_t summary = { 0 };
uint64_t lost;
json_object *ctxarray, *obj;
json_object *memobj = (json_object *)memobj0;
ctxarray = json_object_new_array();
CHECKMEM(ctxarray);
LOCK(&contextslock);
lost = totallost;
for (ctx = ISC_LIST_HEAD(contexts); ctx != NULL;
ctx = ISC_LIST_NEXT(ctx, link)) {
result = json_renderctx(ctx, &summary, ctxarray);
if (result != ISC_R_SUCCESS) {
UNLOCK(&contextslock);
goto error;
}
}
UNLOCK(&contextslock);
obj = json_object_new_int64(summary.total);
CHECKMEM(obj);
json_object_object_add(memobj, "TotalUse", obj);
obj = json_object_new_int64(summary.inuse);
CHECKMEM(obj);
json_object_object_add(memobj, "InUse", obj);
obj = json_object_new_int64(summary.malloced);
CHECKMEM(obj);
json_object_object_add(memobj, "Malloced", obj);
obj = json_object_new_int64(summary.contextsize);
CHECKMEM(obj);
json_object_object_add(memobj, "ContextSize", obj);
obj = json_object_new_int64(lost);
CHECKMEM(obj);
json_object_object_add(memobj, "Lost", obj);
json_object_object_add(memobj, "contexts", ctxarray);
return (ISC_R_SUCCESS);
error:
if (ctxarray != NULL) {
json_object_put(ctxarray);
}
return (result);
}
#endif /* HAVE_JSON_C */
void
isc__mem_create(isc_mem_t **mctxp FLARG) {
mem_create(mctxp, isc_mem_defaultflags);
#if ISC_MEM_TRACKLINES
if ((isc_mem_debugging & ISC_MEM_DEBUGTRACE) != 0) {
fprintf(stderr, "create mctx %p file %s line %u\n", *mctxp,
file, line);
}
#endif /* ISC_MEM_TRACKLINES */
}
void
isc__mem_printactive(isc_mem_t *ctx, FILE *file) {
#if ISC_MEM_TRACKLINES
REQUIRE(VALID_CONTEXT(ctx));
REQUIRE(file != NULL);
print_active(ctx, file);
#else /* if ISC_MEM_TRACKLINES */
UNUSED(ctx);
UNUSED(file);
#endif /* if ISC_MEM_TRACKLINES */
}
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