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- /*-
- * Copyright 2016 Vsevolod Stakhov
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- #include "config.h"
- #include "mem_pool.h"
- #include "fstring.h"
- #include "logger.h"
- #include "ottery.h"
- #include "unix-std.h"
- #include "khash.h"
- #include "cryptobox.h"
- #include "contrib/uthash/utlist.h"
- #include "mem_pool_internal.h"
-
- #ifdef WITH_JEMALLOC
- #include <jemalloc/jemalloc.h>
- #if (JEMALLOC_VERSION_MAJOR == 3 && JEMALLOC_VERSION_MINOR >= 6) || (JEMALLOC_VERSION_MAJOR > 3)
- #define HAVE_MALLOC_SIZE 1
- #define sys_alloc_size(sz) nallocx(sz, 0)
- #endif
- #elif defined(__APPLE__)
- #include <malloc/malloc.h>
- #define HAVE_MALLOC_SIZE 1
- #define sys_alloc_size(sz) malloc_good_size(sz)
- #endif
-
- #ifdef HAVE_SCHED_YIELD
- #include <sched.h>
- #endif
-
- /* Sleep time for spin lock in nanoseconds */
- #define MUTEX_SLEEP_TIME 10000000L
- #define MUTEX_SPIN_COUNT 100
-
- #define POOL_MTX_LOCK() do { } while (0)
- #define POOL_MTX_UNLOCK() do { } while (0)
-
- /*
- * This define specify whether we should check all pools for free space for new object
- * or just begin scan from current (recently attached) pool
- * If MEMORY_GREEDY is defined, then we scan all pools to find free space (more CPU usage, slower
- * but requires less memory). If it is not defined check only current pool and if object is too large
- * to place in it allocate new one (this may cause huge CPU usage in some cases too, but generally faster than
- * greedy method)
- */
- #undef MEMORY_GREEDY
-
-
- static inline uint32_t
- rspamd_entry_hash (const char *str)
- {
- return (guint)rspamd_cryptobox_fast_hash (str, strlen (str), rspamd_hash_seed ());
- }
-
- static inline int
- rspamd_entry_equal (const char *k1, const char *k2)
- {
- return strcmp (k1, k2) == 0;
- }
-
-
- KHASH_INIT(mempool_entry, const gchar *, struct rspamd_mempool_entry_point *,
- 1, rspamd_entry_hash, rspamd_entry_equal)
-
- static khash_t(mempool_entry) *mempool_entries = NULL;
-
-
- /* Internal statistic */
- static rspamd_mempool_stat_t *mem_pool_stat = NULL;
- /* Environment variable */
- static gboolean env_checked = FALSE;
- static gboolean always_malloc = FALSE;
-
- /**
- * Function that return free space in pool page
- * @param x pool page struct
- */
- static gsize
- pool_chain_free (struct _pool_chain *chain)
- {
- gint64 occupied = chain->pos - chain->begin + MIN_MEM_ALIGNMENT;
-
- return (occupied < (gint64)chain->slice_size ?
- chain->slice_size - occupied : 0);
- }
-
- /* By default allocate 4Kb chunks of memory */
- #define FIXED_POOL_SIZE 4096
-
- static inline struct rspamd_mempool_entry_point *
- rspamd_mempool_entry_new (const gchar *loc)
- {
- struct rspamd_mempool_entry_point **pentry, *entry;
- gint r;
- khiter_t k;
-
- k = kh_put (mempool_entry, mempool_entries, loc, &r);
-
- if (r >= 0) {
- pentry = &kh_value (mempool_entries, k);
- entry = g_malloc0 (sizeof (*entry));
- *pentry = entry;
- memset (entry, 0, sizeof (*entry));
- rspamd_strlcpy (entry->src, loc, sizeof (entry->src));
- #ifdef HAVE_GETPAGESIZE
- entry->cur_suggestion = MAX (getpagesize (), FIXED_POOL_SIZE);
- #else
- entry->cur_suggestion = MAX (sysconf (_SC_PAGESIZE), FIXED_POOL_SIZE);
- #endif
- }
- else {
- g_assert_not_reached ();
- }
-
- return entry;
- }
-
- RSPAMD_CONSTRUCTOR (rspamd_mempool_entries_ctor)
- {
- if (mempool_entries == NULL) {
- mempool_entries = kh_init (mempool_entry);
- }
- }
-
- RSPAMD_DESTRUCTOR (rspamd_mempool_entries_dtor)
- {
- struct rspamd_mempool_entry_point *elt;
-
- kh_foreach_value (mempool_entries, elt, {
- g_free (elt);
- });
-
- kh_destroy (mempool_entry, mempool_entries);
- mempool_entries = NULL;
- }
-
- static inline struct rspamd_mempool_entry_point *
- rspamd_mempool_get_entry (const gchar *loc)
- {
- khiter_t k;
- struct rspamd_mempool_entry_point *elt;
-
- if (G_UNLIKELY (!mempool_entries)) {
- rspamd_mempool_entries_ctor();
- }
-
- k = kh_get (mempool_entry, mempool_entries, loc);
-
- if (k != kh_end (mempool_entries)) {
- elt = kh_value (mempool_entries, k);
-
- return elt;
- }
-
- return rspamd_mempool_entry_new(loc);
- }
-
- static struct _pool_chain *
- rspamd_mempool_chain_new (gsize size, gsize alignment, enum rspamd_mempool_chain_type pool_type)
- {
- struct _pool_chain *chain;
- gsize total_size = size + sizeof (struct _pool_chain) + alignment,
- optimal_size = 0;
- gpointer map;
-
- g_assert (size > 0);
-
- if (pool_type == RSPAMD_MEMPOOL_SHARED) {
- #if defined(HAVE_MMAP_ANON)
- map = mmap (NULL,
- total_size,
- PROT_READ | PROT_WRITE,
- MAP_ANON | MAP_SHARED,
- -1,
- 0);
- if (map == MAP_FAILED) {
- g_error ("%s: failed to allocate %"G_GSIZE_FORMAT" bytes",
- G_STRLOC, total_size);
- abort ();
- }
- chain = map;
- chain->begin = ((guint8 *) chain) + sizeof (struct _pool_chain);
- #elif defined(HAVE_MMAP_ZERO)
- gint fd;
-
- fd = open ("/dev/zero", O_RDWR);
- if (fd == -1) {
- return NULL;
- }
- map = mmap (NULL,
- size + sizeof (struct _pool_chain),
- PROT_READ | PROT_WRITE,
- MAP_SHARED,
- fd,
- 0);
- if (map == MAP_FAILED) {
- msg_err ("cannot allocate %z bytes, aborting", size +
- sizeof (struct _pool_chain));
- abort ();
- }
- chain = map;
- chain->begin = ((guint8 *) chain) + sizeof (struct _pool_chain);
- #else
- #error No mmap methods are defined
- #endif
- g_atomic_int_inc (&mem_pool_stat->shared_chunks_allocated);
- g_atomic_int_add (&mem_pool_stat->bytes_allocated, total_size);
- }
- else {
- #ifdef HAVE_MALLOC_SIZE
- optimal_size = sys_alloc_size (total_size);
- #endif
- total_size = MAX (total_size, optimal_size);
- gint ret = posix_memalign (&map, alignment, total_size);
-
- if (ret != 0 || map == NULL) {
- g_error ("%s: failed to allocate %"G_GSIZE_FORMAT" bytes: %d - %s",
- G_STRLOC, total_size, ret, strerror (errno));
- abort ();
- }
-
- chain = map;
- chain->begin = ((guint8 *) chain) + sizeof (struct _pool_chain);
- g_atomic_int_add (&mem_pool_stat->bytes_allocated, total_size);
- g_atomic_int_inc (&mem_pool_stat->chunks_allocated);
- }
-
- chain->pos = align_ptr (chain->begin, alignment);
- chain->slice_size = total_size - sizeof (struct _pool_chain);
-
- return chain;
- }
-
-
- /**
- * Get the current pool of the specified type, creating the corresponding
- * array if it's absent
- * @param pool
- * @param pool_type
- * @return
- */
- static struct _pool_chain *
- rspamd_mempool_get_chain (rspamd_mempool_t * pool,
- enum rspamd_mempool_chain_type pool_type)
- {
- g_assert (pool_type >= 0 && pool_type < RSPAMD_MEMPOOL_MAX);
-
- return pool->priv->pools[pool_type];
- }
-
- static void
- rspamd_mempool_append_chain (rspamd_mempool_t * pool,
- struct _pool_chain *chain,
- enum rspamd_mempool_chain_type pool_type)
- {
- g_assert (pool_type >= 0 && pool_type < RSPAMD_MEMPOOL_MAX);
- g_assert (chain != NULL);
-
- LL_PREPEND (pool->priv->pools[pool_type], chain);
- }
-
- /**
- * Allocate new memory poll
- * @param size size of pool's page
- * @return new memory pool object
- */
- rspamd_mempool_t *
- rspamd_mempool_new_ (gsize size, const gchar *tag, gint flags, const gchar *loc)
- {
- rspamd_mempool_t *new_pool;
- gpointer map;
- unsigned char uidbuf[10];
- const gchar hexdigits[] = "0123456789abcdef";
- unsigned i;
-
- /* Allocate statistic structure if it is not allocated before */
- if (mem_pool_stat == NULL) {
- #if defined(HAVE_MMAP_ANON)
- map = mmap (NULL,
- sizeof (rspamd_mempool_stat_t),
- PROT_READ | PROT_WRITE,
- MAP_ANON | MAP_SHARED,
- -1,
- 0);
- if (map == MAP_FAILED) {
- msg_err ("cannot allocate %z bytes, aborting",
- sizeof (rspamd_mempool_stat_t));
- abort ();
- }
- mem_pool_stat = (rspamd_mempool_stat_t *)map;
- #elif defined(HAVE_MMAP_ZERO)
- gint fd;
-
- fd = open ("/dev/zero", O_RDWR);
- g_assert (fd != -1);
- map = mmap (NULL,
- sizeof (rspamd_mempool_stat_t),
- PROT_READ | PROT_WRITE,
- MAP_SHARED,
- fd,
- 0);
- if (map == MAP_FAILED) {
- msg_err ("cannot allocate %z bytes, aborting",
- sizeof (rspamd_mempool_stat_t));
- abort ();
- }
- mem_pool_stat = (rspamd_mempool_stat_t *)map;
- #else
- # error No mmap methods are defined
- #endif
- memset (map, 0, sizeof (rspamd_mempool_stat_t));
- }
-
- if (!env_checked) {
- /* Check G_SLICE=always-malloc to allow memory pool debug */
- const char *g_slice;
-
- g_slice = getenv ("VALGRIND");
- if (g_slice != NULL) {
- always_malloc = TRUE;
- }
- env_checked = TRUE;
- }
-
- struct rspamd_mempool_entry_point *entry = rspamd_mempool_get_entry (loc);
- gsize total_size;
-
- if (size == 0 && entry) {
- size = entry->cur_suggestion;
- }
-
- total_size = sizeof (rspamd_mempool_t) +
- sizeof (struct rspamd_mempool_specific) +
- MIN_MEM_ALIGNMENT +
- sizeof (struct _pool_chain) +
- size;
-
- if (G_UNLIKELY (flags & RSPAMD_MEMPOOL_DEBUG)) {
- total_size += sizeof (GHashTable *);
- }
- /*
- * Memory layout:
- * struct rspamd_mempool_t
- * <optional debug hash table>
- * struct rspamd_mempool_specific
- * struct _pool_chain
- * alignment (if needed)
- * memory chunk
- */
- guchar *mem_chunk;
- gint ret = posix_memalign ((void **)&mem_chunk, MIN_MEM_ALIGNMENT,
- total_size);
- gsize priv_offset;
-
- if (ret != 0 || mem_chunk == NULL) {
- g_error ("%s: failed to allocate %"G_GSIZE_FORMAT" bytes: %d - %s",
- G_STRLOC, total_size, ret, strerror (errno));
- abort ();
- }
-
- /* Set memory layout */
- new_pool = (rspamd_mempool_t *)mem_chunk;
- if (G_UNLIKELY (flags & RSPAMD_MEMPOOL_DEBUG)) {
- /* Allocate debug table */
- GHashTable *debug_tbl;
-
- debug_tbl = g_hash_table_new (rspamd_str_hash, rspamd_str_equal);
- memcpy (mem_chunk + sizeof (rspamd_mempool_t), &debug_tbl,
- sizeof (GHashTable *));
- priv_offset = sizeof (rspamd_mempool_t) + sizeof (GHashTable *);
- }
- else {
- priv_offset = sizeof (rspamd_mempool_t);
- }
-
- new_pool->priv = (struct rspamd_mempool_specific *)(mem_chunk +
- priv_offset);
- /* Zero memory for specific and for the first chain */
- memset (new_pool->priv, 0, sizeof (struct rspamd_mempool_specific) +
- sizeof (struct _pool_chain));
-
- new_pool->priv->entry = entry;
- new_pool->priv->elt_len = size;
- new_pool->priv->flags = flags;
-
- if (tag) {
- rspamd_strlcpy (new_pool->tag.tagname, tag, sizeof (new_pool->tag.tagname));
- }
- else {
- new_pool->tag.tagname[0] = '\0';
- }
-
- /* Generate new uid */
- ottery_rand_bytes (uidbuf, sizeof (uidbuf));
- for (i = 0; i < G_N_ELEMENTS (uidbuf); i ++) {
- new_pool->tag.uid[i * 2] = hexdigits[(uidbuf[i] >> 4) & 0xf];
- new_pool->tag.uid[i * 2 + 1] = hexdigits[uidbuf[i] & 0xf];
- }
- new_pool->tag.uid[19] = '\0';
-
- mem_pool_stat->pools_allocated++;
-
- /* Now we can attach one chunk to speed up simple allocations */
- struct _pool_chain *nchain;
-
- nchain = (struct _pool_chain *)
- (mem_chunk +
- priv_offset +
- sizeof (struct rspamd_mempool_specific));
-
- guchar *unaligned = mem_chunk +
- priv_offset +
- sizeof (struct rspamd_mempool_specific) +
- sizeof (struct _pool_chain);
-
- nchain->slice_size = size;
- nchain->begin = unaligned;
- nchain->slice_size = size;
- nchain->pos = align_ptr (unaligned, MIN_MEM_ALIGNMENT);
- new_pool->priv->pools[RSPAMD_MEMPOOL_NORMAL] = nchain;
- new_pool->priv->used_memory = size;
-
- /* Adjust stats */
- g_atomic_int_add (&mem_pool_stat->bytes_allocated,
- (gint)size);
- g_atomic_int_add (&mem_pool_stat->chunks_allocated, 1);
-
- return new_pool;
- }
-
- static void *
- memory_pool_alloc_common (rspamd_mempool_t * pool, gsize size, gsize alignment,
- enum rspamd_mempool_chain_type pool_type,
- const gchar *loc)
- RSPAMD_ATTR_ALLOC_SIZE(2) RSPAMD_ATTR_ALLOC_ALIGN(MIN_MEM_ALIGNMENT) RSPAMD_ATTR_RETURNS_NONNUL;
-
-
- void
- rspamd_mempool_notify_alloc_ (rspamd_mempool_t *pool, gsize size, const gchar *loc)
- {
- if (pool && G_UNLIKELY (pool->priv->flags & RSPAMD_MEMPOOL_DEBUG)) {
- GHashTable *debug_tbl = *(GHashTable **)(((guchar *)pool + sizeof (*pool)));
- gpointer ptr;
-
- ptr = g_hash_table_lookup (debug_tbl, loc);
-
- if (ptr) {
- ptr = GSIZE_TO_POINTER (GPOINTER_TO_SIZE (ptr) + size);
- }
- else {
- ptr = GSIZE_TO_POINTER (size);
- }
-
- g_hash_table_insert (debug_tbl, (gpointer) loc, ptr);
- }
- }
-
- static void *
- memory_pool_alloc_common (rspamd_mempool_t * pool, gsize size, gsize alignment,
- enum rspamd_mempool_chain_type pool_type, const gchar *loc)
- {
- guint8 *tmp;
- struct _pool_chain *new, *cur;
- gsize free = 0;
-
- if (pool) {
- POOL_MTX_LOCK ();
- pool->priv->used_memory += size;
-
- if (G_UNLIKELY (pool->priv->flags & RSPAMD_MEMPOOL_DEBUG)) {
- rspamd_mempool_notify_alloc_ (pool, size, loc);
- }
-
- if (always_malloc && pool_type != RSPAMD_MEMPOOL_SHARED) {
- void *ptr;
-
- if (alignment <= G_MEM_ALIGN) {
- ptr = g_malloc(size);
- }
- else {
- ptr = g_malloc(size + alignment);
- ptr = align_ptr(ptr, alignment);
- }
- POOL_MTX_UNLOCK ();
-
- if (pool->priv->trash_stack == NULL) {
- pool->priv->trash_stack = g_ptr_array_sized_new (128);
- }
-
- g_ptr_array_add (pool->priv->trash_stack, ptr);
-
- return ptr;
- }
-
- cur = rspamd_mempool_get_chain (pool, pool_type);
-
- /* Find free space in pool chain */
- if (cur) {
- free = pool_chain_free (cur);
- }
-
- if (cur == NULL || free < size + alignment) {
- if (free < size) {
- pool->priv->wasted_memory += free;
- }
-
- /* Allocate new chain element */
- if (pool->priv->elt_len >= size + alignment) {
- pool->priv->entry->elts[pool->priv->entry->cur_elts].fragmentation += size;
- new = rspamd_mempool_chain_new (pool->priv->elt_len, alignment,
- pool_type);
- }
- else {
- mem_pool_stat->oversized_chunks++;
- g_atomic_int_add (&mem_pool_stat->fragmented_size,
- free);
- pool->priv->entry->elts[pool->priv->entry->cur_elts].fragmentation += free;
- new = rspamd_mempool_chain_new (size + pool->priv->elt_len, alignment,
- pool_type);
- }
-
- /* Connect to pool subsystem */
- rspamd_mempool_append_chain (pool, new, pool_type);
- /* No need to align again, aligned by rspamd_mempool_chain_new */
- tmp = new->pos;
- new->pos = tmp + size;
- POOL_MTX_UNLOCK ();
-
- return tmp;
- }
-
- /* No need to allocate page */
- tmp = align_ptr (cur->pos, alignment);
- cur->pos = tmp + size;
- POOL_MTX_UNLOCK ();
-
- return tmp;
- }
-
- abort ();
- }
-
-
- void *
- rspamd_mempool_alloc_ (rspamd_mempool_t * pool, gsize size, gsize alignment, const gchar *loc)
- {
- return memory_pool_alloc_common (pool, size, alignment, RSPAMD_MEMPOOL_NORMAL, loc);
- }
-
- void *
- rspamd_mempool_alloc0_ (rspamd_mempool_t * pool, gsize size, gsize alignment, const gchar *loc)
- {
- void *pointer = rspamd_mempool_alloc_ (pool, size, alignment, loc);
- memset (pointer, 0, size);
-
- return pointer;
- }
- void *
- rspamd_mempool_alloc0_shared_ (rspamd_mempool_t * pool, gsize size, gsize alignment, const gchar *loc)
- {
- void *pointer = rspamd_mempool_alloc_shared_ (pool, size, alignment, loc);
-
- memset (pointer, 0, size);
- return pointer;
- }
-
- void *
- rspamd_mempool_alloc_shared_ (rspamd_mempool_t * pool, gsize size, gsize alignment, const gchar *loc)
- {
- return memory_pool_alloc_common (pool, size, alignment, RSPAMD_MEMPOOL_SHARED, loc);
- }
-
-
- gchar *
- rspamd_mempool_strdup_ (rspamd_mempool_t * pool, const gchar *src, const gchar *loc)
- {
- gsize len;
- gchar *newstr;
-
- if (src == NULL) {
- return NULL;
- }
-
- len = strlen (src);
- newstr = rspamd_mempool_alloc_ (pool, len + 1, MIN_MEM_ALIGNMENT, loc);
- memcpy (newstr, src, len);
- newstr[len] = '\0';
-
- return newstr;
- }
-
- gchar *
- rspamd_mempool_fstrdup_ (rspamd_mempool_t * pool, const struct f_str_s *src,
- const gchar *loc)
- {
- gchar *newstr;
-
- if (src == NULL) {
- return NULL;
- }
-
- newstr = rspamd_mempool_alloc_ (pool, src->len + 1, MIN_MEM_ALIGNMENT, loc);
- memcpy (newstr, src->str, src->len);
- newstr[src->len] = '\0';
-
- return newstr;
- }
-
- gchar *
- rspamd_mempool_ftokdup_ (rspamd_mempool_t *pool, const rspamd_ftok_t *src,
- const gchar *loc)
- {
- gchar *newstr;
-
- if (src == NULL) {
- return NULL;
- }
-
- newstr = rspamd_mempool_alloc_ (pool, src->len + 1, MIN_MEM_ALIGNMENT, loc);
- memcpy (newstr, src->begin, src->len);
- newstr[src->len] = '\0';
-
- return newstr;
- }
-
- void
- rspamd_mempool_add_destructor_full (rspamd_mempool_t * pool,
- rspamd_mempool_destruct_t func,
- void *data,
- const gchar *function,
- const gchar *line)
- {
- struct _pool_destructors *cur;
-
- POOL_MTX_LOCK ();
- cur = rspamd_mempool_alloc_ (pool, sizeof (*cur),
- RSPAMD_ALIGNOF(struct _pool_destructors), line);
- cur->func = func;
- cur->data = data;
- cur->function = function;
- cur->loc = line;
- cur->next = NULL;
-
- if (pool->priv->dtors_tail) {
- pool->priv->dtors_tail->next = cur;
- pool->priv->dtors_tail = cur;
- }
- else {
- pool->priv->dtors_head = cur;
- pool->priv->dtors_tail = cur;
- }
-
- POOL_MTX_UNLOCK ();
- }
-
- void
- rspamd_mempool_replace_destructor (rspamd_mempool_t * pool,
- rspamd_mempool_destruct_t func,
- void *old_data,
- void *new_data)
- {
- struct _pool_destructors *tmp;
-
- LL_FOREACH (pool->priv->dtors_head, tmp) {
- if (tmp->func == func && tmp->data == old_data) {
- tmp->func = func;
- tmp->data = new_data;
- break;
- }
- }
- }
-
- static gint
- cmp_int (gconstpointer a, gconstpointer b)
- {
- gint i1 = *(const gint *)a, i2 = *(const gint *)b;
-
- return i1 - i2;
- }
-
- static void
- rspamd_mempool_adjust_entry (struct rspamd_mempool_entry_point *e)
- {
- gint sz[G_N_ELEMENTS (e->elts)], sel_pos, sel_neg;
- guint i, jitter;
-
- for (i = 0; i < G_N_ELEMENTS (sz); i ++) {
- sz[i] = e->elts[i].fragmentation - (gint)e->elts[i].leftover;
- }
-
- qsort (sz, G_N_ELEMENTS (sz), sizeof (gint), cmp_int);
- jitter = rspamd_random_uint64_fast () % 10;
- /*
- * Take stochaistic quantiles
- */
- sel_pos = sz[50 + jitter];
- sel_neg = sz[4 + jitter];
-
- if (-sel_neg > sel_pos) {
- /* We need to reduce current suggestion */
- e->cur_suggestion /= (1 + (((double)-sel_neg) / e->cur_suggestion)) * 1.5;
- }
- else {
- /* We still want to grow */
- e->cur_suggestion *= (1 + (((double)sel_pos) / e->cur_suggestion)) * 1.5;
- }
-
- /* Some sane limits counting mempool architecture */
- if (e->cur_suggestion < 1024) {
- e->cur_suggestion = 1024;
- }
- else if (e->cur_suggestion > 1024 * 1024 * 10) {
- e->cur_suggestion = 1024 * 1024 * 10;
- }
-
- memset (e->elts, 0, sizeof (e->elts));
- }
-
- static void
- rspamd_mempool_variables_cleanup (rspamd_mempool_t * pool)
- {
- if (pool->priv->variables) {
- struct rspamd_mempool_variable *var;
- kh_foreach_value_ptr (pool->priv->variables, var, {
- if (var->dtor) {
- var->dtor (var->data);
- }
- });
-
- if (pool->priv->entry && pool->priv->entry->cur_vars <
- kh_size (pool->priv->variables)) {
- /*
- * Increase preallocated size in two cases:
- * 1) Our previous guess was zero
- * 2) Our new variables count is not more than twice larger than
- * previous count
- * 3) Our variables count is less than some hard limit
- */
- static const guint max_preallocated_vars = 512;
-
- guint cur_size = kh_size (pool->priv->variables);
- guint old_guess = pool->priv->entry->cur_vars;
- guint new_guess;
-
- if (old_guess == 0) {
- new_guess = MIN (cur_size, max_preallocated_vars);
- }
- else {
- if (old_guess * 2 < cur_size) {
- new_guess = MIN (cur_size, max_preallocated_vars);
- }
- else {
- /* Too large step */
- new_guess = MIN (old_guess * 2, max_preallocated_vars);
- }
- }
-
- pool->priv->entry->cur_vars = new_guess;
- }
-
- kh_destroy (rspamd_mempool_vars_hash, pool->priv->variables);
- pool->priv->variables = NULL;
- }
- }
-
- void
- rspamd_mempool_destructors_enforce (rspamd_mempool_t *pool)
- {
- struct _pool_destructors *destructor;
-
- POOL_MTX_LOCK ();
-
- LL_FOREACH (pool->priv->dtors_head, destructor) {
- /* Avoid calling destructors for NULL pointers */
- if (destructor->data != NULL) {
- destructor->func (destructor->data);
- }
- }
-
- pool->priv->dtors_head = pool->priv->dtors_tail = NULL;
-
- rspamd_mempool_variables_cleanup (pool);
-
- POOL_MTX_UNLOCK ();
- }
-
- struct mempool_debug_elt {
- gsize sz;
- const gchar *loc;
- };
-
- static gint
- rspamd_mempool_debug_elt_cmp (const void *a, const void *b)
- {
- const struct mempool_debug_elt *e1 = a, *e2 = b;
-
- /* Inverse order */
- return (gint)((gssize)e2->sz) - ((gssize)e1->sz);
- }
-
- void
- rspamd_mempool_delete (rspamd_mempool_t * pool)
- {
- struct _pool_chain *cur, *tmp;
- struct _pool_destructors *destructor;
- gpointer ptr;
- guint i;
- gsize len;
-
- POOL_MTX_LOCK ();
-
- cur = pool->priv->pools[RSPAMD_MEMPOOL_NORMAL];
-
- if (G_UNLIKELY (pool->priv->flags & RSPAMD_MEMPOOL_DEBUG)) {
- GHashTable *debug_tbl = *(GHashTable **)(((guchar *)pool) + sizeof (*pool));
- /* Show debug info */
- gsize ndtor = 0;
- LL_COUNT (pool->priv->dtors_head, destructor, ndtor);
- msg_info_pool ("destructing of the memory pool %p; elt size = %z; "
- "used memory = %Hz; wasted memory = %Hd; "
- "vars = %z; destructors = %z",
- pool,
- pool->priv->elt_len,
- pool->priv->used_memory,
- pool->priv->wasted_memory,
- pool->priv->variables ? (gsize)kh_size (pool->priv->variables) : (gsize)0,
- ndtor);
-
- GHashTableIter it;
- gpointer k, v;
- GArray *sorted_debug_size = g_array_sized_new (FALSE, FALSE,
- sizeof (struct mempool_debug_elt),
- g_hash_table_size (debug_tbl));
-
- g_hash_table_iter_init (&it, debug_tbl);
-
- while (g_hash_table_iter_next (&it, &k, &v)) {
- struct mempool_debug_elt e;
- e.loc = (const gchar *)k;
- e.sz = GPOINTER_TO_SIZE (v);
- g_array_append_val (sorted_debug_size, e);
- }
-
- g_array_sort (sorted_debug_size, rspamd_mempool_debug_elt_cmp);
-
- for (guint _i = 0; _i < sorted_debug_size->len; _i ++) {
- struct mempool_debug_elt *e;
-
- e = &g_array_index (sorted_debug_size, struct mempool_debug_elt, _i);
- msg_info_pool ("allocated %Hz from %s", e->sz, e->loc);
- }
-
- g_array_free (sorted_debug_size, TRUE);
- g_hash_table_unref (debug_tbl);
- }
-
- if (cur && mempool_entries) {
- pool->priv->entry->elts[pool->priv->entry->cur_elts].leftover =
- pool_chain_free (cur);
-
- pool->priv->entry->cur_elts = (pool->priv->entry->cur_elts + 1) %
- G_N_ELEMENTS (pool->priv->entry->elts);
-
- if (pool->priv->entry->cur_elts == 0) {
- rspamd_mempool_adjust_entry (pool->priv->entry);
- }
- }
-
- /* Call all pool destructors */
- LL_FOREACH (pool->priv->dtors_head, destructor) {
- /* Avoid calling destructors for NULL pointers */
- if (destructor->data != NULL) {
- destructor->func (destructor->data);
- }
- }
-
- rspamd_mempool_variables_cleanup (pool);
-
- if (pool->priv->trash_stack) {
- for (i = 0; i < pool->priv->trash_stack->len; i++) {
- ptr = g_ptr_array_index (pool->priv->trash_stack, i);
- g_free (ptr);
- }
-
- g_ptr_array_free (pool->priv->trash_stack, TRUE);
- }
-
- for (i = 0; i < G_N_ELEMENTS (pool->priv->pools); i ++) {
- if (pool->priv->pools[i]) {
- LL_FOREACH_SAFE (pool->priv->pools[i], cur, tmp) {
- g_atomic_int_add (&mem_pool_stat->bytes_allocated,
- -((gint)cur->slice_size));
- g_atomic_int_add (&mem_pool_stat->chunks_allocated, -1);
-
- len = cur->slice_size + sizeof (struct _pool_chain);
-
- if (i == RSPAMD_MEMPOOL_SHARED) {
- munmap ((void *)cur, len);
- }
- else {
- /* The last pool is special, it is a part of the initial chunk */
- if (cur->next != NULL) {
- free (cur); /* Not g_free as we use system allocator */
- }
- }
- }
- }
- }
-
- g_atomic_int_inc (&mem_pool_stat->pools_freed);
- POOL_MTX_UNLOCK ();
- free (pool); /* allocated by posix_memalign */
- }
-
- void
- rspamd_mempool_stat (rspamd_mempool_stat_t * st)
- {
- if (mem_pool_stat != NULL) {
- st->pools_allocated = mem_pool_stat->pools_allocated;
- st->pools_freed = mem_pool_stat->pools_freed;
- st->shared_chunks_allocated = mem_pool_stat->shared_chunks_allocated;
- st->bytes_allocated = mem_pool_stat->bytes_allocated;
- st->chunks_allocated = mem_pool_stat->chunks_allocated;
- st->chunks_freed = mem_pool_stat->chunks_freed;
- st->oversized_chunks = mem_pool_stat->oversized_chunks;
- }
- }
-
- void
- rspamd_mempool_stat_reset (void)
- {
- if (mem_pool_stat != NULL) {
- memset (mem_pool_stat, 0, sizeof (rspamd_mempool_stat_t));
- }
- }
-
- gsize
- rspamd_mempool_suggest_size_ (const char *loc)
- {
- return 0;
- }
-
- #if !defined(HAVE_PTHREAD_PROCESS_SHARED) || defined(DISABLE_PTHREAD_MUTEX)
- /*
- * Own emulation
- */
- static inline gint
- __mutex_spin (rspamd_mempool_mutex_t * mutex)
- {
- /* check spin count */
- if (g_atomic_int_dec_and_test (&mutex->spin)) {
- /* This may be deadlock, so check owner of this lock */
- if (mutex->owner == getpid ()) {
- /* This mutex was locked by calling process, so it is just double lock and we can easily unlock it */
- g_atomic_int_set (&mutex->spin, MUTEX_SPIN_COUNT);
- return 0;
- }
- else if (kill (mutex->owner, 0) == -1) {
- /* Owner process was not found, so release lock */
- g_atomic_int_set (&mutex->spin, MUTEX_SPIN_COUNT);
- return 0;
- }
- /* Spin again */
- g_atomic_int_set (&mutex->spin, MUTEX_SPIN_COUNT);
- }
-
- #ifdef HAVE_SCHED_YIELD
- (void)sched_yield ();
- #elif defined(HAVE_NANOSLEEP)
- struct timespec ts;
- ts.tv_sec = 0;
- ts.tv_nsec = MUTEX_SLEEP_TIME;
- /* Spin */
- while (nanosleep (&ts, &ts) == -1 && errno == EINTR) ;
- #else
- #error No methods to spin are defined
- #endif
- return 1;
- }
-
- static void
- memory_pool_mutex_spin (rspamd_mempool_mutex_t * mutex)
- {
- while (!g_atomic_int_compare_and_exchange (&mutex->lock, 0, 1)) {
- if (!__mutex_spin (mutex)) {
- return;
- }
- }
- }
-
- rspamd_mempool_mutex_t *
- rspamd_mempool_get_mutex (rspamd_mempool_t * pool)
- {
- rspamd_mempool_mutex_t *res;
- if (pool != NULL) {
- res =
- rspamd_mempool_alloc_shared (pool, sizeof (rspamd_mempool_mutex_t));
- res->lock = 0;
- res->owner = 0;
- res->spin = MUTEX_SPIN_COUNT;
- return res;
- }
- return NULL;
- }
-
- void
- rspamd_mempool_lock_mutex (rspamd_mempool_mutex_t * mutex)
- {
- memory_pool_mutex_spin (mutex);
- mutex->owner = getpid ();
- }
-
- void
- rspamd_mempool_unlock_mutex (rspamd_mempool_mutex_t * mutex)
- {
- mutex->owner = 0;
- (void)g_atomic_int_compare_and_exchange (&mutex->lock, 1, 0);
- }
-
- rspamd_mempool_rwlock_t *
- rspamd_mempool_get_rwlock (rspamd_mempool_t * pool)
- {
- rspamd_mempool_rwlock_t *lock;
-
- lock = rspamd_mempool_alloc_shared (pool, sizeof (rspamd_mempool_rwlock_t));
- lock->__r_lock = rspamd_mempool_get_mutex (pool);
- lock->__w_lock = rspamd_mempool_get_mutex (pool);
-
- return lock;
- }
-
- void
- rspamd_mempool_rlock_rwlock (rspamd_mempool_rwlock_t * lock)
- {
- /* Spin on write lock */
- while (g_atomic_int_get (&lock->__w_lock->lock)) {
- if (!__mutex_spin (lock->__w_lock)) {
- break;
- }
- }
-
- g_atomic_int_inc (&lock->__r_lock->lock);
- lock->__r_lock->owner = getpid ();
- }
-
- void
- rspamd_mempool_wlock_rwlock (rspamd_mempool_rwlock_t * lock)
- {
- /* Spin on write lock first */
- rspamd_mempool_lock_mutex (lock->__w_lock);
- /* Now we have write lock set up */
- /* Wait all readers */
- while (g_atomic_int_get (&lock->__r_lock->lock)) {
- __mutex_spin (lock->__r_lock);
- }
- }
-
- void
- rspamd_mempool_runlock_rwlock (rspamd_mempool_rwlock_t * lock)
- {
- if (g_atomic_int_get (&lock->__r_lock->lock)) {
- (void)g_atomic_int_dec_and_test (&lock->__r_lock->lock);
- }
- }
-
- void
- rspamd_mempool_wunlock_rwlock (rspamd_mempool_rwlock_t * lock)
- {
- rspamd_mempool_unlock_mutex (lock->__w_lock);
- }
- #else
-
- /*
- * Pthread bases shared mutexes
- */
- rspamd_mempool_mutex_t *
- rspamd_mempool_get_mutex (rspamd_mempool_t * pool)
- {
- rspamd_mempool_mutex_t *res;
- pthread_mutexattr_t mattr;
-
- if (pool != NULL) {
- res =
- rspamd_mempool_alloc_shared (pool, sizeof (rspamd_mempool_mutex_t));
-
- pthread_mutexattr_init (&mattr);
- pthread_mutexattr_setpshared (&mattr, PTHREAD_PROCESS_SHARED);
- pthread_mutexattr_setrobust (&mattr, PTHREAD_MUTEX_ROBUST);
- pthread_mutex_init (res, &mattr);
- rspamd_mempool_add_destructor (pool,
- (rspamd_mempool_destruct_t)pthread_mutex_destroy, res);
- pthread_mutexattr_destroy (&mattr);
-
- return res;
- }
- return NULL;
- }
-
- void
- rspamd_mempool_lock_mutex (rspamd_mempool_mutex_t * mutex)
- {
- pthread_mutex_lock (mutex);
- }
-
- void
- rspamd_mempool_unlock_mutex (rspamd_mempool_mutex_t * mutex)
- {
- pthread_mutex_unlock (mutex);
- }
-
- rspamd_mempool_rwlock_t *
- rspamd_mempool_get_rwlock (rspamd_mempool_t * pool)
- {
- rspamd_mempool_rwlock_t *res;
- pthread_rwlockattr_t mattr;
-
- if (pool != NULL) {
- res =
- rspamd_mempool_alloc_shared (pool, sizeof (rspamd_mempool_rwlock_t));
-
- pthread_rwlockattr_init (&mattr);
- pthread_rwlockattr_setpshared (&mattr, PTHREAD_PROCESS_SHARED);
- pthread_rwlock_init (res, &mattr);
- rspamd_mempool_add_destructor (pool,
- (rspamd_mempool_destruct_t)pthread_rwlock_destroy, res);
- pthread_rwlockattr_destroy (&mattr);
-
- return res;
- }
- return NULL;
- }
-
- void
- rspamd_mempool_rlock_rwlock (rspamd_mempool_rwlock_t * lock)
- {
- pthread_rwlock_rdlock (lock);
- }
-
- void
- rspamd_mempool_wlock_rwlock (rspamd_mempool_rwlock_t * lock)
- {
- pthread_rwlock_wrlock (lock);
- }
-
- void
- rspamd_mempool_runlock_rwlock (rspamd_mempool_rwlock_t * lock)
- {
- pthread_rwlock_unlock (lock);
- }
-
- void
- rspamd_mempool_wunlock_rwlock (rspamd_mempool_rwlock_t * lock)
- {
- pthread_rwlock_unlock (lock);
- }
- #endif
-
- #define RSPAMD_MEMPOOL_VARS_HASH_SEED 0xb32ad7c55eb2e647ULL
- void
- rspamd_mempool_set_variable (rspamd_mempool_t *pool,
- const gchar *name,
- gpointer value,
- rspamd_mempool_destruct_t destructor)
- {
- if (pool->priv->variables == NULL) {
-
- pool->priv->variables = kh_init (rspamd_mempool_vars_hash);
-
- if (pool->priv->entry->cur_vars > 0) {
- /* Preallocate */
- kh_resize (rspamd_mempool_vars_hash,
- pool->priv->variables,
- pool->priv->entry->cur_vars);
- }
- }
-
- gint hv = rspamd_cryptobox_fast_hash (name, strlen (name),
- RSPAMD_MEMPOOL_VARS_HASH_SEED);
- khiter_t it;
- gint r;
-
- it = kh_put (rspamd_mempool_vars_hash, pool->priv->variables, hv, &r);
-
- if (it == kh_end (pool->priv->variables)) {
- g_assert_not_reached ();
- }
- else {
- struct rspamd_mempool_variable *pvar;
-
- if (r == 0) {
- /* Existing entry, maybe need cleanup */
- pvar = &kh_val (pool->priv->variables, it);
-
- if (pvar->dtor) {
- pvar->dtor (pvar->data);
- }
- }
-
- pvar = &kh_val (pool->priv->variables, it);
- pvar->data = value;
- pvar->dtor = destructor;
- }
- }
-
- gpointer
- rspamd_mempool_get_variable (rspamd_mempool_t *pool, const gchar *name)
- {
- if (pool->priv->variables == NULL) {
- return NULL;
- }
-
- khiter_t it;
- gint hv = rspamd_cryptobox_fast_hash (name, strlen (name),
- RSPAMD_MEMPOOL_VARS_HASH_SEED);
-
- it = kh_get (rspamd_mempool_vars_hash, pool->priv->variables, hv);
-
- if (it != kh_end (pool->priv->variables)) {
- struct rspamd_mempool_variable *pvar;
-
- pvar = &kh_val (pool->priv->variables, it);
- return pvar->data;
- }
-
- return NULL;
- }
-
- void
- rspamd_mempool_remove_variable (rspamd_mempool_t *pool, const gchar *name)
- {
- if (pool->priv->variables != NULL) {
- khiter_t it;
- gint hv = rspamd_cryptobox_fast_hash (name, strlen (name),
- RSPAMD_MEMPOOL_VARS_HASH_SEED);
-
- it = kh_get (rspamd_mempool_vars_hash, pool->priv->variables, hv);
-
- if (it != kh_end (pool->priv->variables)) {
- struct rspamd_mempool_variable *pvar;
-
- pvar = &kh_val (pool->priv->variables, it);
-
- if (pvar->dtor) {
- pvar->dtor (pvar->data);
- }
-
- kh_del (rspamd_mempool_vars_hash, pool->priv->variables, it);
- }
- }
- }
-
- GList *
- rspamd_mempool_glist_prepend (rspamd_mempool_t *pool, GList *l, gpointer p)
- {
- GList *cell;
-
- cell = rspamd_mempool_alloc (pool, sizeof (*cell));
- cell->prev = NULL;
- cell->data = p;
-
- if (l == NULL) {
- cell->next = NULL;
- }
- else {
- cell->next = l;
- l->prev = cell;
- }
-
- return cell;
- }
-
- GList *
- rspamd_mempool_glist_append (rspamd_mempool_t *pool, GList *l, gpointer p)
- {
- GList *cell, *cur;
-
- cell = rspamd_mempool_alloc (pool, sizeof (*cell));
- cell->next = NULL;
- cell->data = p;
-
- if (l) {
- for (cur = l; cur->next != NULL; cur = cur->next) {}
- cur->next = cell;
- cell->prev = cur;
- }
- else {
- l = cell;
- l->prev = NULL;
- }
-
- return l;
- }
-
- gsize
- rspamd_mempool_get_used_size (rspamd_mempool_t *pool)
- {
- return pool->priv->used_memory;
- }
-
- gsize
- rspamd_mempool_get_wasted_size (rspamd_mempool_t *pool)
- {
- return pool->priv->wasted_memory;
- }
|