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zend_hash.c
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2015 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <[email protected]> |
| Zeev Suraski <[email protected]> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "zend.h"
#include "zend_globals.h"
#include "zend_variables.h"
#define HT_DEBUG 0
#if HT_DEBUG
# define HT_ASSERT(c) ZEND_ASSERT(c)
#else
# define HT_ASSERT(c)
#endif
#if ZEND_DEBUG
/*
#define HASH_MASK_CONSISTENCY 0x60
*/
#define HT_OK 0x00
#define HT_IS_DESTROYING 0x20
#define HT_DESTROYED 0x40
#define HT_CLEANING 0x60
static void _zend_is_inconsistent(const HashTable *ht, const char *file, int line)
{
if ((ht->u.flags & HASH_MASK_CONSISTENCY) == HT_OK) {
return;
}
switch ((ht->u.flags & HASH_MASK_CONSISTENCY)) {
case HT_IS_DESTROYING:
zend_output_debug_string(1, "%s(%d) : ht=%p is being destroyed", file, line, ht);
break;
case HT_DESTROYED:
zend_output_debug_string(1, "%s(%d) : ht=%p is already destroyed", file, line, ht);
break;
case HT_CLEANING:
zend_output_debug_string(1, "%s(%d) : ht=%p is being cleaned", file, line, ht);
break;
default:
zend_output_debug_string(1, "%s(%d) : ht=%p is inconsistent", file, line, ht);
break;
}
zend_bailout();
}
#define IS_CONSISTENT(a) _zend_is_inconsistent(a, __FILE__, __LINE__);
#define SET_INCONSISTENT(n) do { \
(ht)->u.flags |= n; \
} while (0)
#else
#define IS_CONSISTENT(a)
#define SET_INCONSISTENT(n)
#endif
#define HASH_PROTECT_RECURSION(ht) \
if ((ht)->u.flags & HASH_FLAG_APPLY_PROTECTION) { \
if ((ht)->u.flags >= (3 << 8)) { \
zend_error_noreturn(E_ERROR, "Nesting level too deep - recursive dependency?");\
} \
ZEND_HASH_INC_APPLY_COUNT(ht); \
}
#define HASH_UNPROTECT_RECURSION(ht) \
if ((ht)->u.flags & HASH_FLAG_APPLY_PROTECTION) { \
ZEND_HASH_DEC_APPLY_COUNT(ht); \
}
#define ZEND_HASH_IF_FULL_DO_RESIZE(ht) \
if ((ht)->nNumUsed >= (ht)->nTableSize) { \
zend_hash_do_resize(ht); \
}
static void zend_hash_do_resize(HashTable *ht);
static uint32_t zend_always_inline zend_hash_check_size(uint32_t nSize)
{
#if defined(ZEND_WIN32)
unsigned long index;
#endif
/* Use big enough power of 2 */
/* size should be between HT_MIN_SIZE and HT_MAX_SIZE */
nSize = (nSize <= HT_MIN_SIZE ? HT_MIN_SIZE : (nSize >= HT_MAX_SIZE ? HT_MAX_SIZE : nSize));
#if defined(ZEND_WIN32)
if (BitScanReverse(&index, nSize - 1)) {
return 0x2 << ((31 - index) ^ 0x1f);
} else {
/* nSize is ensured to be in the valid range, fall back to it
rather than using an undefined bis scan result. */
return nSize;
}
#elif defined(__GNUC__)
return 0x2 << (__builtin_clz(nSize - 1) ^ 0x1f);
#else
nSize -= 1;
nSize |= (nSize >> 1);
nSize |= (nSize >> 2);
nSize |= (nSize >> 4);
nSize |= (nSize >> 8);
nSize |= (nSize >> 16);
return nSize + 1;
#endif
}
static void zend_always_inline zend_hash_check_init(HashTable *ht, int packed)
{
HT_ASSERT(GC_REFCOUNT(ht) == 1);
if (UNEXPECTED(!((ht)->u.flags & HASH_FLAG_INITIALIZED))) {
if (packed) {
(ht)->u.flags |= HASH_FLAG_INITIALIZED | HASH_FLAG_PACKED;
(ht)->arData = (Bucket *) pemalloc((ht)->nTableSize * sizeof(Bucket), (ht)->u.flags & HASH_FLAG_PERSISTENT);
} else {
(ht)->u.flags |= HASH_FLAG_INITIALIZED;
(ht)->nTableMask = (ht)->nTableSize - 1;
(ht)->arData = (Bucket *) pemalloc((ht)->nTableSize * (sizeof(Bucket) + sizeof(uint32_t)), (ht)->u.flags & HASH_FLAG_PERSISTENT);
(ht)->arHash = (uint32_t*)((ht)->arData + (ht)->nTableSize);
memset((ht)->arHash, INVALID_IDX, (ht)->nTableSize * sizeof(uint32_t));
}
}
}
#define CHECK_INIT(ht, packed) \
zend_hash_check_init(ht, packed)
static const uint32_t uninitialized_bucket = {INVALID_IDX};
ZEND_API void _zend_hash_init(HashTable *ht, uint32_t nSize, dtor_func_t pDestructor, zend_bool persistent ZEND_FILE_LINE_DC)
{
GC_REFCOUNT(ht) = 1;
GC_TYPE_INFO(ht) = IS_ARRAY;
ht->nTableSize = zend_hash_check_size(nSize);
ht->nTableMask = 0;
ht->nNumUsed = 0;
ht->nNumOfElements = 0;
ht->nNextFreeElement = 0;
ht->arData = NULL;
ht->arHash = (uint32_t*)&uninitialized_bucket;
ht->pDestructor = pDestructor;
ht->nInternalPointer = INVALID_IDX;
ht->u.flags = (persistent ? HASH_FLAG_PERSISTENT : 0) | HASH_FLAG_APPLY_PROTECTION;
}
static zend_always_inline void zend_hash_realloc(HashTable *ht, size_t new_size)
{
#if 1
if (!(ht->u.flags & HASH_FLAG_PERSISTENT) && new_size <= ZEND_MM_MAX_SMALL_SIZE) {
Bucket *newData = emalloc(new_size);
memcpy(newData, ht->arData, ht->nNumUsed * sizeof(Bucket));
efree(ht->arData);
ht->arData = newData;
return;
}
#endif
ht->arData = (Bucket *) perealloc2(ht->arData, new_size, ht->nNumUsed * sizeof(Bucket), ht->u.flags & HASH_FLAG_PERSISTENT);
}
static void zend_hash_packed_grow(HashTable *ht)
{
HT_ASSERT(GC_REFCOUNT(ht) == 1);
if (ht->nTableSize >= HT_MAX_SIZE) {
zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (%zu * %zu + %zu)", ht->nTableSize * 2, sizeof(Bucket), sizeof(Bucket));
}
HANDLE_BLOCK_INTERRUPTIONS();
ht->nTableSize += ht->nTableSize;
zend_hash_realloc(ht, ht->nTableSize * sizeof(Bucket));
HANDLE_UNBLOCK_INTERRUPTIONS();
}
ZEND_API void zend_hash_real_init(HashTable *ht, zend_bool packed)
{
IS_CONSISTENT(ht);
HT_ASSERT(GC_REFCOUNT(ht) == 1);
CHECK_INIT(ht, packed);
}
ZEND_API void zend_hash_packed_to_hash(HashTable *ht)
{
HT_ASSERT(GC_REFCOUNT(ht) == 1);
HANDLE_BLOCK_INTERRUPTIONS();
ht->u.flags &= ~HASH_FLAG_PACKED;
ht->nTableMask = ht->nTableSize - 1;
zend_hash_realloc(ht, ht->nTableSize * (sizeof(Bucket) + sizeof(uint32_t)));
ht->arHash = (uint32_t*)(ht->arData + ht->nTableSize);
zend_hash_rehash(ht);
HANDLE_UNBLOCK_INTERRUPTIONS();
}
ZEND_API void zend_hash_to_packed(HashTable *ht)
{
HT_ASSERT(GC_REFCOUNT(ht) == 1);
HANDLE_BLOCK_INTERRUPTIONS();
ht->u.flags |= HASH_FLAG_PACKED;
ht->nTableMask = 0;
zend_hash_realloc(ht, ht->nTableSize * sizeof(Bucket));
ht->arHash = (uint32_t*)&uninitialized_bucket;
HANDLE_UNBLOCK_INTERRUPTIONS();
}
ZEND_API void _zend_hash_init_ex(HashTable *ht, uint32_t nSize, dtor_func_t pDestructor, zend_bool persistent, zend_bool bApplyProtection ZEND_FILE_LINE_DC)
{
_zend_hash_init(ht, nSize, pDestructor, persistent ZEND_FILE_LINE_CC);
if (!bApplyProtection) {
ht->u.flags &= ~HASH_FLAG_APPLY_PROTECTION;
}
}
ZEND_API void zend_hash_extend(HashTable *ht, uint32_t nSize, zend_bool packed)
{
HT_ASSERT(GC_REFCOUNT(ht) == 1);
if (nSize == 0) return;
if (UNEXPECTED(!((ht)->u.flags & HASH_FLAG_INITIALIZED))) {
if (nSize > ht->nTableSize) {
ht->nTableSize = zend_hash_check_size(nSize);
}
zend_hash_check_init(ht, packed);
} else {
if (packed) {
ZEND_ASSERT(ht->u.flags & HASH_FLAG_PACKED);
if (nSize > ht->nTableSize) {
HANDLE_BLOCK_INTERRUPTIONS();
ht->nTableSize = zend_hash_check_size(nSize);
zend_hash_realloc(ht, ht->nTableSize * sizeof(Bucket));
HANDLE_UNBLOCK_INTERRUPTIONS();
}
} else {
ZEND_ASSERT(!(ht->u.flags & HASH_FLAG_PACKED));
if (nSize > ht->nTableSize) {
HANDLE_BLOCK_INTERRUPTIONS();
ht->nTableSize = zend_hash_check_size(nSize);
zend_hash_realloc(ht, ht->nTableSize * (sizeof(Bucket) + sizeof(uint32_t)));
ht->arHash = (uint32_t*)(ht->arData + ht->nTableSize);
ht->nTableMask = ht->nTableSize - 1;
zend_hash_rehash(ht);
HANDLE_UNBLOCK_INTERRUPTIONS();
}
}
}
}
ZEND_API void zend_hash_set_apply_protection(HashTable *ht, zend_bool bApplyProtection)
{
if (bApplyProtection) {
ht->u.flags |= HASH_FLAG_APPLY_PROTECTION;
} else {
ht->u.flags &= ~HASH_FLAG_APPLY_PROTECTION;
}
}
ZEND_API uint32_t zend_hash_iterator_add(HashTable *ht, HashPosition pos)
{
HashTableIterator *iter = EG(ht_iterators);
HashTableIterator *end = iter + EG(ht_iterators_count);
uint32_t idx;
if (EXPECTED(ht->u.v.nIteratorsCount != 255)) {
ht->u.v.nIteratorsCount++;
}
while (iter != end) {
if (iter->ht == NULL) {
iter->ht = ht;
iter->pos = pos;
idx = iter - EG(ht_iterators);
if (idx + 1 > EG(ht_iterators_used)) {
EG(ht_iterators_used) = idx + 1;
}
return idx;
}
iter++;
}
if (EG(ht_iterators) == EG(ht_iterators_slots)) {
EG(ht_iterators) = emalloc(sizeof(HashTableIterator) * (EG(ht_iterators_count) + 8));
memcpy(EG(ht_iterators), EG(ht_iterators_slots), sizeof(HashTableIterator) * EG(ht_iterators_count));
} else {
EG(ht_iterators) = erealloc(EG(ht_iterators), sizeof(HashTableIterator) * (EG(ht_iterators_count) + 8));
}
iter = EG(ht_iterators) + EG(ht_iterators_count);
EG(ht_iterators_count) += 8;
iter->ht = ht;
iter->pos = pos;
memset(iter + 1, 0, sizeof(HashTableIterator) * 7);
idx = iter - EG(ht_iterators);
EG(ht_iterators_used) = idx + 1;
return idx;
}
ZEND_API HashPosition zend_hash_iterator_pos(uint32_t idx, HashTable *ht)
{
HashTableIterator *iter = EG(ht_iterators) + idx;
ZEND_ASSERT(idx != (uint32_t)-1);
if (iter->pos == INVALID_IDX) {
return INVALID_IDX;
} else if (UNEXPECTED(iter->ht != ht)) {
if (EXPECTED(iter->ht) && EXPECTED(iter->ht->u.v.nIteratorsCount != 255)) {
iter->ht->u.v.nIteratorsCount--;
}
if (EXPECTED(ht->u.v.nIteratorsCount != 255)) {
ht->u.v.nIteratorsCount++;
}
iter->ht = ht;
iter->pos = ht->nInternalPointer;
}
return iter->pos;
}
ZEND_API void zend_hash_iterator_del(uint32_t idx)
{
HashTableIterator *iter = EG(ht_iterators) + idx;
ZEND_ASSERT(idx != (uint32_t)-1);
if (EXPECTED(iter->ht) && EXPECTED(iter->ht->u.v.nIteratorsCount != 255)) {
iter->ht->u.v.nIteratorsCount--;
}
iter->ht = NULL;
if (idx == EG(ht_iterators_used) - 1) {
while (idx > 0 && EG(ht_iterators)[idx - 1].ht == NULL) {
idx--;
}
EG(ht_iterators_used) = idx;
}
}
static zend_never_inline void _zend_hash_iterators_remove(HashTable *ht)
{
HashTableIterator *iter = EG(ht_iterators);
HashTableIterator *end = iter + EG(ht_iterators_used);
uint32_t idx;
while (iter != end) {
if (iter->ht == ht) {
iter->ht = NULL;
}
iter++;
}
idx = EG(ht_iterators_used);
while (idx > 0 && EG(ht_iterators)[idx - 1].ht == NULL) {
idx--;
}
EG(ht_iterators_used) = idx;
}
static zend_always_inline void zend_hash_iterators_remove(HashTable *ht)
{
if (UNEXPECTED(ht->u.v.nIteratorsCount)) {
_zend_hash_iterators_remove(ht);
}
}
ZEND_API HashPosition zend_hash_iterators_lower_pos(HashTable *ht, HashPosition start)
{
HashTableIterator *iter = EG(ht_iterators);
HashTableIterator *end = iter + EG(ht_iterators_used);
HashPosition res = INVALID_IDX;
while (iter != end) {
if (iter->ht == ht) {
if (iter->pos >= start && iter->pos < res) {
res = iter->pos;
}
}
iter++;
}
return res;
}
ZEND_API void _zend_hash_iterators_update(HashTable *ht, HashPosition from, HashPosition to)
{
HashTableIterator *iter = EG(ht_iterators);
HashTableIterator *end = iter + EG(ht_iterators_used);
while (iter != end) {
if (iter->ht == ht && iter->pos == from) {
iter->pos = to;
}
iter++;
}
}
static zend_always_inline Bucket *zend_hash_find_bucket(const HashTable *ht, zend_string *key)
{
zend_ulong h;
uint32_t nIndex;
uint32_t idx;
Bucket *p;
h = zend_string_hash_val(key);
nIndex = h & ht->nTableMask;
idx = ht->arHash[nIndex];
while (idx != INVALID_IDX) {
p = ht->arData + idx;
if ((p->key == key) || /* check for the the same interned string */
(p->h == h &&
p->key &&
p->key->len == key->len &&
memcmp(p->key->val, key->val, key->len) == 0)) {
return p;
}
idx = Z_NEXT(p->val);
}
return NULL;
}
static zend_always_inline Bucket *zend_hash_str_find_bucket(const HashTable *ht, const char *str, size_t len, zend_ulong h)
{
uint32_t nIndex;
uint32_t idx;
Bucket *p;
nIndex = h & ht->nTableMask;
idx = ht->arHash[nIndex];
while (idx != INVALID_IDX) {
ZEND_ASSERT(idx < ht->nTableSize);
p = ht->arData + idx;
if ((p->h == h)
&& p->key
&& (p->key->len == len)
&& !memcmp(p->key->val, str, len)) {
return p;
}
idx = Z_NEXT(p->val);
}
return NULL;
}
static zend_always_inline Bucket *zend_hash_index_find_bucket(const HashTable *ht, zend_ulong h)
{
uint32_t nIndex;
uint32_t idx;
Bucket *p;
nIndex = h & ht->nTableMask;
idx = ht->arHash[nIndex];
while (idx != INVALID_IDX) {
ZEND_ASSERT(idx < ht->nTableSize);
p = ht->arData + idx;
if (p->h == h && !p->key) {
return p;
}
idx = Z_NEXT(p->val);
}
return NULL;
}
static zend_always_inline zval *_zend_hash_add_or_update_i(HashTable *ht, zend_string *key, zval *pData, uint32_t flag ZEND_FILE_LINE_DC)
{
zend_ulong h;
uint32_t nIndex;
uint32_t idx;
Bucket *p;
IS_CONSISTENT(ht);
HT_ASSERT(GC_REFCOUNT(ht) == 1);
if (UNEXPECTED(!(ht->u.flags & HASH_FLAG_INITIALIZED))) {
CHECK_INIT(ht, 0);
goto add_to_hash;
} else if (ht->u.flags & HASH_FLAG_PACKED) {
zend_hash_packed_to_hash(ht);
} else if ((flag & HASH_ADD_NEW) == 0) {
p = zend_hash_find_bucket(ht, key);
if (p) {
zval *data;
if (flag & HASH_ADD) {
return NULL;
}
ZEND_ASSERT(&p->val != pData);
data = &p->val;
if ((flag & HASH_UPDATE_INDIRECT) && Z_TYPE_P(data) == IS_INDIRECT) {
data = Z_INDIRECT_P(data);
}
HANDLE_BLOCK_INTERRUPTIONS();
if (ht->pDestructor) {
ht->pDestructor(data);
}
ZVAL_COPY_VALUE(data, pData);
HANDLE_UNBLOCK_INTERRUPTIONS();
return data;
}
}
ZEND_HASH_IF_FULL_DO_RESIZE(ht); /* If the Hash table is full, resize it */
add_to_hash:
HANDLE_BLOCK_INTERRUPTIONS();
idx = ht->nNumUsed++;
ht->nNumOfElements++;
if (ht->nInternalPointer == INVALID_IDX) {
ht->nInternalPointer = idx;
}
zend_hash_iterators_update(ht, INVALID_IDX, idx);
p = ht->arData + idx;
p->h = h = zend_string_hash_val(key);
p->key = key;
zend_string_addref(key);
ZVAL_COPY_VALUE(&p->val, pData);
nIndex = h & ht->nTableMask;
Z_NEXT(p->val) = ht->arHash[nIndex];
ht->arHash[nIndex] = idx;
HANDLE_UNBLOCK_INTERRUPTIONS();
return &p->val;
}
ZEND_API zval *_zend_hash_add_or_update(HashTable *ht, zend_string *key, zval *pData, uint32_t flag ZEND_FILE_LINE_DC)
{
return _zend_hash_add_or_update_i(ht, key, pData, flag ZEND_FILE_LINE_RELAY_CC);
}
ZEND_API zval *_zend_hash_add(HashTable *ht, zend_string *key, zval *pData ZEND_FILE_LINE_DC)
{
return _zend_hash_add_or_update_i(ht, key, pData, HASH_ADD ZEND_FILE_LINE_RELAY_CC);
}
ZEND_API zval *_zend_hash_update(HashTable *ht, zend_string *key, zval *pData ZEND_FILE_LINE_DC)
{
return _zend_hash_add_or_update_i(ht, key, pData, HASH_UPDATE ZEND_FILE_LINE_RELAY_CC);
}
ZEND_API zval *_zend_hash_update_ind(HashTable *ht, zend_string *key, zval *pData ZEND_FILE_LINE_DC)
{
return _zend_hash_add_or_update_i(ht, key, pData, HASH_UPDATE | HASH_UPDATE_INDIRECT ZEND_FILE_LINE_RELAY_CC);
}
ZEND_API zval *_zend_hash_add_new(HashTable *ht, zend_string *key, zval *pData ZEND_FILE_LINE_DC)
{
return _zend_hash_add_or_update_i(ht, key, pData, HASH_ADD_NEW ZEND_FILE_LINE_RELAY_CC);
}
ZEND_API zval *_zend_hash_str_add_or_update(HashTable *ht, const char *str, size_t len, zval *pData, uint32_t flag ZEND_FILE_LINE_DC)
{
zend_string *key = zend_string_init(str, len, ht->u.flags & HASH_FLAG_PERSISTENT);
zval *ret = _zend_hash_add_or_update_i(ht, key, pData, flag ZEND_FILE_LINE_CC);
zend_string_release(key);
return ret;
}
ZEND_API zval *_zend_hash_str_update(HashTable *ht, const char *str, size_t len, zval *pData ZEND_FILE_LINE_DC)
{
zend_string *key = zend_string_init(str, len, ht->u.flags & HASH_FLAG_PERSISTENT);
zval *ret = _zend_hash_add_or_update_i(ht, key, pData, HASH_UPDATE ZEND_FILE_LINE_CC);
zend_string_release(key);
return ret;
}
ZEND_API zval *_zend_hash_str_update_ind(HashTable *ht, const char *str, size_t len, zval *pData ZEND_FILE_LINE_DC)
{
zend_string *key = zend_string_init(str, len, ht->u.flags & HASH_FLAG_PERSISTENT);
zval *ret = _zend_hash_add_or_update_i(ht, key, pData, HASH_UPDATE | HASH_UPDATE_INDIRECT ZEND_FILE_LINE_CC);
zend_string_release(key);
return ret;
}
ZEND_API zval *_zend_hash_str_add(HashTable *ht, const char *str, size_t len, zval *pData ZEND_FILE_LINE_DC)
{
zend_string *key = zend_string_init(str, len, ht->u.flags & HASH_FLAG_PERSISTENT);
zval *ret = _zend_hash_add_or_update_i(ht, key, pData, HASH_ADD ZEND_FILE_LINE_CC);
zend_string_release(key);
return ret;
}
ZEND_API zval *_zend_hash_str_add_new(HashTable *ht, const char *str, size_t len, zval *pData ZEND_FILE_LINE_DC)
{
zend_string *key = zend_string_init(str, len, ht->u.flags & HASH_FLAG_PERSISTENT);
zval *ret = _zend_hash_add_or_update_i(ht, key, pData, HASH_ADD_NEW ZEND_FILE_LINE_CC);
zend_string_release(key);
return ret;
}
ZEND_API zval *zend_hash_index_add_empty_element(HashTable *ht, zend_ulong h)
{
zval dummy;
ZVAL_NULL(&dummy);
return zend_hash_index_add(ht, h, &dummy);
}
ZEND_API zval *zend_hash_add_empty_element(HashTable *ht, zend_string *key)
{
zval dummy;
ZVAL_NULL(&dummy);
return zend_hash_add(ht, key, &dummy);
}
ZEND_API zval *zend_hash_str_add_empty_element(HashTable *ht, const char *str, size_t len)
{
zval dummy;
ZVAL_NULL(&dummy);
return zend_hash_str_add(ht, str, len, &dummy);
}
static zend_always_inline zval *_zend_hash_index_add_or_update_i(HashTable *ht, zend_ulong h, zval *pData, uint32_t flag ZEND_FILE_LINE_DC)
{
uint32_t nIndex;
uint32_t idx;
Bucket *p;
IS_CONSISTENT(ht);
HT_ASSERT(GC_REFCOUNT(ht) == 1);
if (UNEXPECTED(!(ht->u.flags & HASH_FLAG_INITIALIZED))) {
CHECK_INIT(ht, h < ht->nTableSize);
if (h < ht->nTableSize) {
p = ht->arData + h;
goto add_to_packed;
}
goto add_to_hash;
} else if (ht->u.flags & HASH_FLAG_PACKED) {
if (h < ht->nNumUsed) {
p = ht->arData + h;
if (Z_TYPE(p->val) != IS_UNDEF) {
if (flag & HASH_ADD) {
return NULL;
}
if (ht->pDestructor) {
ht->pDestructor(&p->val);
}
ZVAL_COPY_VALUE(&p->val, pData);
if ((zend_long)h >= (zend_long)ht->nNextFreeElement) {
ht->nNextFreeElement = h < ZEND_LONG_MAX ? h + 1 : ZEND_LONG_MAX;
}
return &p->val;
} else { /* we have to keep the order :( */
goto convert_to_hash;
}
} else if (EXPECTED(h < ht->nTableSize)) {
p = ht->arData + h;
} else if ((h >> 1) < ht->nTableSize &&
(ht->nTableSize >> 1) < ht->nNumOfElements) {
zend_hash_packed_grow(ht);
p = ht->arData + h;
} else {
goto convert_to_hash;
}
add_to_packed:
HANDLE_BLOCK_INTERRUPTIONS();
/* incremental initialization of empty Buckets */
if ((flag & (HASH_ADD_NEW|HASH_ADD_NEXT)) == (HASH_ADD_NEW|HASH_ADD_NEXT)) {
ht->nNumUsed = h + 1;
} else if (h >= ht->nNumUsed) {
if (h > ht->nNumUsed) {
Bucket *q = ht->arData + ht->nNumUsed;
while (q != p) {
ZVAL_UNDEF(&q->val);
q++;
}
}
ht->nNumUsed = h + 1;
}
ht->nNumOfElements++;
if (ht->nInternalPointer == INVALID_IDX) {
ht->nInternalPointer = h;
}
zend_hash_iterators_update(ht, INVALID_IDX, h);
if ((zend_long)h >= (zend_long)ht->nNextFreeElement) {
ht->nNextFreeElement = h < ZEND_LONG_MAX ? h + 1 : ZEND_LONG_MAX;
}
p->h = h;
p->key = NULL;
ZVAL_COPY_VALUE(&p->val, pData);
HANDLE_UNBLOCK_INTERRUPTIONS();
return &p->val;
convert_to_hash:
zend_hash_packed_to_hash(ht);
} else if ((flag & HASH_ADD_NEW) == 0) {
p = zend_hash_index_find_bucket(ht, h);
if (p) {
if (flag & HASH_ADD) {
return NULL;
}
ZEND_ASSERT(&p->val != pData);
HANDLE_BLOCK_INTERRUPTIONS();
if (ht->pDestructor) {
ht->pDestructor(&p->val);
}
ZVAL_COPY_VALUE(&p->val, pData);
HANDLE_UNBLOCK_INTERRUPTIONS();
if ((zend_long)h >= (zend_long)ht->nNextFreeElement) {
ht->nNextFreeElement = h < ZEND_LONG_MAX ? h + 1 : ZEND_LONG_MAX;
}
return &p->val;
}
}
ZEND_HASH_IF_FULL_DO_RESIZE(ht); /* If the Hash table is full, resize it */
add_to_hash:
HANDLE_BLOCK_INTERRUPTIONS();
idx = ht->nNumUsed++;
ht->nNumOfElements++;
if (ht->nInternalPointer == INVALID_IDX) {
ht->nInternalPointer = idx;
}
zend_hash_iterators_update(ht, INVALID_IDX, idx);
if ((zend_long)h >= (zend_long)ht->nNextFreeElement) {
ht->nNextFreeElement = h < ZEND_LONG_MAX ? h + 1 : ZEND_LONG_MAX;
}
p = ht->arData + idx;
p->h = h;
p->key = NULL;
nIndex = h & ht->nTableMask;
ZVAL_COPY_VALUE(&p->val, pData);
Z_NEXT(p->val) = ht->arHash[nIndex];
ht->arHash[nIndex] = idx;
HANDLE_UNBLOCK_INTERRUPTIONS();
return &p->val;
}
ZEND_API zval *_zend_hash_index_add_or_update(HashTable *ht, zend_ulong h, zval *pData, uint32_t flag ZEND_FILE_LINE_DC)
{
return _zend_hash_index_add_or_update_i(ht, h, pData, flag ZEND_FILE_LINE_RELAY_CC);
}
ZEND_API zval *_zend_hash_index_add(HashTable *ht, zend_ulong h, zval *pData ZEND_FILE_LINE_DC)
{
return _zend_hash_index_add_or_update_i(ht, h, pData, HASH_ADD ZEND_FILE_LINE_RELAY_CC);
}
ZEND_API zval *_zend_hash_index_add_new(HashTable *ht, zend_ulong h, zval *pData ZEND_FILE_LINE_DC)
{
return _zend_hash_index_add_or_update_i(ht, h, pData, HASH_ADD | HASH_ADD_NEW ZEND_FILE_LINE_RELAY_CC);
}
ZEND_API zval *_zend_hash_index_update(HashTable *ht, zend_ulong h, zval *pData ZEND_FILE_LINE_DC)
{
return _zend_hash_index_add_or_update_i(ht, h, pData, HASH_UPDATE ZEND_FILE_LINE_RELAY_CC);
}
ZEND_API zval *_zend_hash_next_index_insert(HashTable *ht, zval *pData ZEND_FILE_LINE_DC)
{
return _zend_hash_index_add_or_update_i(ht, ht->nNextFreeElement, pData, HASH_ADD | HASH_ADD_NEXT ZEND_FILE_LINE_RELAY_CC);
}
ZEND_API zval *_zend_hash_next_index_insert_new(HashTable *ht, zval *pData ZEND_FILE_LINE_DC)
{
return _zend_hash_index_add_or_update_i(ht, ht->nNextFreeElement, pData, HASH_ADD | HASH_ADD_NEW | HASH_ADD_NEXT ZEND_FILE_LINE_RELAY_CC);
}
static void zend_hash_do_resize(HashTable *ht)
{
IS_CONSISTENT(ht);
HT_ASSERT(GC_REFCOUNT(ht) == 1);
if (ht->nNumUsed > ht->nNumOfElements) {
HANDLE_BLOCK_INTERRUPTIONS();
zend_hash_rehash(ht);
HANDLE_UNBLOCK_INTERRUPTIONS();
} else if (ht->nTableSize < HT_MAX_SIZE) { /* Let's double the table size */
HANDLE_BLOCK_INTERRUPTIONS();
ht->nTableSize += ht->nTableSize;
zend_hash_realloc(ht, ht->nTableSize * (sizeof(Bucket) + sizeof(uint32_t)));
ht->arHash = (uint32_t*)(ht->arData + ht->nTableSize);
ht->nTableMask = ht->nTableSize - 1;
zend_hash_rehash(ht);
HANDLE_UNBLOCK_INTERRUPTIONS();
} else {
zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (%zu * %zu + %zu)", ht->nTableSize * 2, sizeof(Bucket) + sizeof(uint32_t), sizeof(Bucket));
}
}
ZEND_API int zend_hash_rehash(HashTable *ht)
{
Bucket *p;
uint32_t nIndex, i, j;
IS_CONSISTENT(ht);
if (UNEXPECTED(ht->nNumOfElements == 0)) {
if (ht->u.flags & HASH_FLAG_INITIALIZED) {
memset(ht->arHash, INVALID_IDX, ht->nTableSize * sizeof(uint32_t));
}
return SUCCESS;
}
memset(ht->arHash, INVALID_IDX, ht->nTableSize * sizeof(uint32_t));
if (EXPECTED(ht->u.v.nIteratorsCount == 0)) {
for (i = 0, j = 0; i < ht->nNumUsed; i++) {
p = ht->arData + i;
if (Z_TYPE(p->val) == IS_UNDEF) continue;
if (i != j) {
ht->arData[j] = ht->arData[i];
if (ht->nInternalPointer == i) {
ht->nInternalPointer = j;
}
}
nIndex = ht->arData[j].h & ht->nTableMask;
Z_NEXT(ht->arData[j].val) = ht->arHash[nIndex];
ht->arHash[nIndex] = j;
j++;
}
} else {
uint32_t iter_pos = zend_hash_iterators_lower_pos(ht, 0);
for (i = 0, j = 0; i < ht->nNumUsed; i++) {
p = ht->arData + i;
if (Z_TYPE(p->val) == IS_UNDEF) continue;
if (i != j) {
ht->arData[j] = ht->arData[i];
if (ht->nInternalPointer == i) {
ht->nInternalPointer = j;
}
if (i == iter_pos) {
zend_hash_iterators_update(ht, i, j);
iter_pos = zend_hash_iterators_lower_pos(ht, iter_pos + 1);
}
}
nIndex = ht->arData[j].h & ht->nTableMask;
Z_NEXT(ht->arData[j].val) = ht->arHash[nIndex];
ht->arHash[nIndex] = j;
j++;
}
}
ht->nNumUsed = j;
return SUCCESS;
}
static zend_always_inline void _zend_hash_del_el_ex(HashTable *ht, uint32_t idx, Bucket *p, Bucket *prev)
{
HANDLE_BLOCK_INTERRUPTIONS();
if (!(ht->u.flags & HASH_FLAG_PACKED)) {
if (prev) {
Z_NEXT(prev->val) = Z_NEXT(p->val);
} else {
ht->arHash[p->h & ht->nTableMask] = Z_NEXT(p->val);
}
}
if (ht->nNumUsed - 1 == idx) {
do {
ht->nNumUsed--;
} while (ht->nNumUsed > 0 && (Z_TYPE(ht->arData[ht->nNumUsed-1].val) == IS_UNDEF));
}
ht->nNumOfElements--;
if (ht->nInternalPointer == idx || UNEXPECTED(ht->u.v.nIteratorsCount)) {
uint32_t new_idx = idx;
while (1) {
new_idx++;
if (new_idx >= ht->nNumUsed) {
new_idx = INVALID_IDX;
break;
} else if (Z_TYPE(ht->arData[new_idx].val) != IS_UNDEF) {
break;
}
}
if (ht->nInternalPointer == idx) {
ht->nInternalPointer = new_idx;
}
zend_hash_iterators_update(ht, idx, new_idx);
}
if (p->key) {
zend_string_release(p->key);
}
if (ht->pDestructor) {
zval tmp;
ZVAL_COPY_VALUE(&tmp, &p->val);
ZVAL_UNDEF(&p->val);
ht->pDestructor(&tmp);
} else {
ZVAL_UNDEF(&p->val);
}
HANDLE_UNBLOCK_INTERRUPTIONS();
}
static zend_always_inline void _zend_hash_del_el(HashTable *ht, uint32_t idx, Bucket *p)
{
Bucket *prev = NULL;
if (!(ht->u.flags & HASH_FLAG_PACKED)) {
uint32_t nIndex = p->h & ht->nTableMask;
uint32_t i = ht->arHash[nIndex];
if (i != idx) {
prev = ht->arData + i;
while (Z_NEXT(prev->val) != idx) {
i = Z_NEXT(prev->val);
prev = ht->arData + i;
}
}
}
_zend_hash_del_el_ex(ht, idx, p, prev);
}
ZEND_API int zend_hash_del(HashTable *ht, zend_string *key)
{
zend_ulong h;
uint32_t nIndex;
uint32_t idx;
Bucket *p;
Bucket *prev = NULL;
IS_CONSISTENT(ht);
HT_ASSERT(GC_REFCOUNT(ht) == 1);
h = zend_string_hash_val(key);
nIndex = h & ht->nTableMask;
idx = ht->arHash[nIndex];
while (idx != INVALID_IDX) {
p = ht->arData + idx;
if ((p->key == key) ||
(p->h == h &&
p->key &&
p->key->len == key->len &&
memcmp(p->key->val, key->val, key->len) == 0)) {
_zend_hash_del_el_ex(ht, idx, p, prev);
return SUCCESS;
}
prev = p;
idx = Z_NEXT(p->val);
}
return FAILURE;
}
ZEND_API int zend_hash_del_ind(HashTable *ht, zend_string *key)
{
zend_ulong h;
uint32_t nIndex;
uint32_t idx;
Bucket *p;
Bucket *prev = NULL;
IS_CONSISTENT(ht);
HT_ASSERT(GC_REFCOUNT(ht) == 1);
h = zend_string_hash_val(key);
nIndex = h & ht->nTableMask;
idx = ht->arHash[nIndex];
while (idx != INVALID_IDX) {
p = ht->arData + idx;
if ((p->key == key) ||
(p->h == h &&
p->key &&
p->key->len == key->len &&
memcmp(p->key->val, key->val, key->len) == 0)) {
if (Z_TYPE(p->val) == IS_INDIRECT) {
zval *data = Z_INDIRECT(p->val);
if (Z_TYPE_P(data) == IS_UNDEF) {
return FAILURE;
} else {
if (ht->pDestructor) {
ht->pDestructor(data);
}
ZVAL_UNDEF(data);
}
} else {
_zend_hash_del_el_ex(ht, idx, p, prev);
}
return SUCCESS;
}
prev = p;
idx = Z_NEXT(p->val);
}
return FAILURE;
}
ZEND_API int zend_hash_str_del(HashTable *ht, const char *str, size_t len)
{
zend_ulong h;
uint32_t nIndex;
uint32_t idx;
Bucket *p;
Bucket *prev = NULL;