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zend_hash.c
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zend_hash.c
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 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 |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@php.net> |
| Zeev Suraski <zeev@php.net> |
| Dmitry Stogov <dmitry@php.net> |
+----------------------------------------------------------------------+
*/
#include "zend.h"
#include "zend_globals.h"
#include "zend_variables.h"
#if defined(__aarch64__) || defined(_M_ARM64)
# include <arm_neon.h>
#endif
/* Prefer to use AVX2 instructions for better latency and throughput */
#if defined(__AVX2__)
# include <immintrin.h>
#elif defined( __SSE2__)
# include <mmintrin.h>
# include <emmintrin.h>
#endif
#if ZEND_DEBUG
# define HT_ASSERT(ht, expr) \
ZEND_ASSERT((expr) || (HT_FLAGS(ht) & HASH_FLAG_ALLOW_COW_VIOLATION))
#else
# define HT_ASSERT(ht, expr)
#endif
#define HT_ASSERT_RC1(ht) HT_ASSERT(ht, GC_REFCOUNT(ht) == 1)
#define HT_POISONED_PTR ((HashTable *) (intptr_t) -1)
#if ZEND_DEBUG
#define HT_OK 0x00
#define HT_IS_DESTROYING 0x01
#define HT_DESTROYED 0x02
#define HT_CLEANING 0x03
static void _zend_is_inconsistent(const HashTable *ht, const char *file, int line)
{
if ((HT_FLAGS(ht) & HASH_FLAG_CONSISTENCY) == HT_OK) {
return;
}
switch (HT_FLAGS(ht) & HASH_FLAG_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_UNREACHABLE();
}
#define IS_CONSISTENT(a) _zend_is_inconsistent(a, __FILE__, __LINE__);
#define SET_INCONSISTENT(n) do { \
HT_FLAGS(ht) = (HT_FLAGS(ht) & ~HASH_FLAG_CONSISTENCY) | (n); \
} while (0)
#else
#define IS_CONSISTENT(a)
#define SET_INCONSISTENT(n)
#endif
#define ZEND_HASH_IF_FULL_DO_RESIZE(ht) \
if ((ht)->nNumUsed >= (ht)->nTableSize) { \
zend_hash_do_resize(ht); \
}
ZEND_API void *zend_hash_str_find_ptr_lc(const HashTable *ht, const char *str, size_t len) {
void *result;
char *lc_str;
/* Stack allocate small strings to improve performance */
ALLOCA_FLAG(use_heap)
lc_str = zend_str_tolower_copy(do_alloca(len + 1, use_heap), str, len);
result = zend_hash_str_find_ptr(ht, lc_str, len);
free_alloca(lc_str, use_heap);
return result;
}
ZEND_API void *zend_hash_find_ptr_lc(const HashTable *ht, zend_string *key) {
void *result;
zend_string *lc_key = zend_string_tolower(key);
result = zend_hash_find_ptr(ht, lc_key);
zend_string_release(lc_key);
return result;
}
static void ZEND_FASTCALL zend_hash_do_resize(HashTable *ht);
static zend_always_inline uint32_t zend_hash_check_size(uint32_t nSize)
{
#ifdef ZEND_WIN32
unsigned long index;
#endif
/* Use big enough power of 2 */
/* size should be between HT_MIN_SIZE and HT_MAX_SIZE */
if (nSize <= HT_MIN_SIZE) {
return HT_MIN_SIZE;
} else if (UNEXPECTED(nSize > HT_MAX_SIZE)) {
zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (%u * %zu + %zu)", nSize, sizeof(Bucket), sizeof(Bucket));
}
#ifdef ZEND_WIN32
if (BitScanReverse(&index, nSize - 1)) {
return 0x2u << ((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__) || __has_builtin(__builtin_clz)) && defined(PHP_HAVE_BUILTIN_CLZ)
return 0x2u << (__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 zend_always_inline void zend_hash_real_init_packed_ex(HashTable *ht)
{
void *data;
if (UNEXPECTED(GC_FLAGS(ht) & IS_ARRAY_PERSISTENT)) {
data = pemalloc(HT_PACKED_SIZE_EX(ht->nTableSize, HT_MIN_MASK), 1);
} else if (EXPECTED(ht->nTableSize == HT_MIN_SIZE)) {
/* Use specialized API with constant allocation amount for a particularly common case. */
data = emalloc(HT_PACKED_SIZE_EX(HT_MIN_SIZE, HT_MIN_MASK));
} else {
data = emalloc(HT_PACKED_SIZE_EX(ht->nTableSize, HT_MIN_MASK));
}
HT_SET_DATA_ADDR(ht, data);
/* Don't overwrite iterator count. */
ht->u.v.flags = HASH_FLAG_PACKED | HASH_FLAG_STATIC_KEYS;
HT_HASH_RESET_PACKED(ht);
}
static zend_always_inline void zend_hash_real_init_mixed_ex(HashTable *ht)
{
void *data;
uint32_t nSize = ht->nTableSize;
ZEND_ASSERT(HT_SIZE_TO_MASK(nSize));
if (UNEXPECTED(GC_FLAGS(ht) & IS_ARRAY_PERSISTENT)) {
data = pemalloc(HT_SIZE_EX(nSize, HT_SIZE_TO_MASK(nSize)), 1);
} else if (EXPECTED(nSize == HT_MIN_SIZE)) {
data = emalloc(HT_SIZE_EX(HT_MIN_SIZE, HT_SIZE_TO_MASK(HT_MIN_SIZE)));
ht->nTableMask = HT_SIZE_TO_MASK(HT_MIN_SIZE);
HT_SET_DATA_ADDR(ht, data);
/* Don't overwrite iterator count. */
ht->u.v.flags = HASH_FLAG_STATIC_KEYS;
#if defined(__AVX2__)
do {
__m256i ymm0 = _mm256_setzero_si256();
ymm0 = _mm256_cmpeq_epi64(ymm0, ymm0);
_mm256_storeu_si256((__m256i*)&HT_HASH_EX(data, 0), ymm0);
_mm256_storeu_si256((__m256i*)&HT_HASH_EX(data, 8), ymm0);
} while(0);
#elif defined (__SSE2__)
do {
__m128i xmm0 = _mm_setzero_si128();
xmm0 = _mm_cmpeq_epi8(xmm0, xmm0);
_mm_storeu_si128((__m128i*)&HT_HASH_EX(data, 0), xmm0);
_mm_storeu_si128((__m128i*)&HT_HASH_EX(data, 4), xmm0);
_mm_storeu_si128((__m128i*)&HT_HASH_EX(data, 8), xmm0);
_mm_storeu_si128((__m128i*)&HT_HASH_EX(data, 12), xmm0);
} while (0);
#elif defined(__aarch64__) || defined(_M_ARM64)
do {
int32x4_t t = vdupq_n_s32(-1);
vst1q_s32((int32_t*)&HT_HASH_EX(data, 0), t);
vst1q_s32((int32_t*)&HT_HASH_EX(data, 4), t);
vst1q_s32((int32_t*)&HT_HASH_EX(data, 8), t);
vst1q_s32((int32_t*)&HT_HASH_EX(data, 12), t);
} while (0);
#else
HT_HASH_EX(data, 0) = -1;
HT_HASH_EX(data, 1) = -1;
HT_HASH_EX(data, 2) = -1;
HT_HASH_EX(data, 3) = -1;
HT_HASH_EX(data, 4) = -1;
HT_HASH_EX(data, 5) = -1;
HT_HASH_EX(data, 6) = -1;
HT_HASH_EX(data, 7) = -1;
HT_HASH_EX(data, 8) = -1;
HT_HASH_EX(data, 9) = -1;
HT_HASH_EX(data, 10) = -1;
HT_HASH_EX(data, 11) = -1;
HT_HASH_EX(data, 12) = -1;
HT_HASH_EX(data, 13) = -1;
HT_HASH_EX(data, 14) = -1;
HT_HASH_EX(data, 15) = -1;
#endif
return;
} else {
data = emalloc(HT_SIZE_EX(nSize, HT_SIZE_TO_MASK(nSize)));
}
ht->nTableMask = HT_SIZE_TO_MASK(nSize);
HT_SET_DATA_ADDR(ht, data);
HT_FLAGS(ht) = HASH_FLAG_STATIC_KEYS;
HT_HASH_RESET(ht);
}
static zend_always_inline void zend_hash_real_init_ex(HashTable *ht, bool packed)
{
HT_ASSERT_RC1(ht);
ZEND_ASSERT(HT_FLAGS(ht) & HASH_FLAG_UNINITIALIZED);
if (packed) {
zend_hash_real_init_packed_ex(ht);
} else {
zend_hash_real_init_mixed_ex(ht);
}
}
static const uint32_t uninitialized_bucket[-HT_MIN_MASK] =
{HT_INVALID_IDX, HT_INVALID_IDX};
ZEND_API const HashTable zend_empty_array = {
.gc.refcount = 2,
.gc.u.type_info = IS_ARRAY | (GC_IMMUTABLE << GC_FLAGS_SHIFT),
.u.flags = HASH_FLAG_UNINITIALIZED,
.nTableMask = HT_MIN_MASK,
{.arData = (Bucket*)&uninitialized_bucket[2]},
.nNumUsed = 0,
.nNumOfElements = 0,
.nTableSize = HT_MIN_SIZE,
.nInternalPointer = 0,
.nNextFreeElement = ZEND_LONG_MIN,
.pDestructor = ZVAL_PTR_DTOR
};
static zend_always_inline void _zend_hash_init_int(HashTable *ht, uint32_t nSize, dtor_func_t pDestructor, bool persistent)
{
GC_SET_REFCOUNT(ht, 1);
GC_TYPE_INFO(ht) = GC_ARRAY | (persistent ? ((GC_PERSISTENT|GC_NOT_COLLECTABLE) << GC_FLAGS_SHIFT) : 0);
HT_FLAGS(ht) = HASH_FLAG_UNINITIALIZED;
ht->nTableMask = HT_MIN_MASK;
HT_SET_DATA_ADDR(ht, &uninitialized_bucket);
ht->nNumUsed = 0;
ht->nNumOfElements = 0;
ht->nInternalPointer = 0;
ht->nNextFreeElement = ZEND_LONG_MIN;
ht->pDestructor = pDestructor;
ht->nTableSize = zend_hash_check_size(nSize);
}
ZEND_API void ZEND_FASTCALL _zend_hash_init(HashTable *ht, uint32_t nSize, dtor_func_t pDestructor, bool persistent)
{
_zend_hash_init_int(ht, nSize, pDestructor, persistent);
}
ZEND_API HashTable* ZEND_FASTCALL _zend_new_array_0(void)
{
HashTable *ht = emalloc(sizeof(HashTable));
_zend_hash_init_int(ht, HT_MIN_SIZE, ZVAL_PTR_DTOR, 0);
return ht;
}
ZEND_API HashTable* ZEND_FASTCALL _zend_new_array(uint32_t nSize)
{
HashTable *ht = emalloc(sizeof(HashTable));
_zend_hash_init_int(ht, nSize, ZVAL_PTR_DTOR, 0);
return ht;
}
ZEND_API HashTable* ZEND_FASTCALL zend_new_pair(zval *val1, zval *val2)
{
zval *zv;
HashTable *ht = emalloc(sizeof(HashTable));
_zend_hash_init_int(ht, HT_MIN_SIZE, ZVAL_PTR_DTOR, 0);
ht->nNumUsed = ht->nNumOfElements = ht->nNextFreeElement = 2;
zend_hash_real_init_packed_ex(ht);
zv = ht->arPacked;
ZVAL_COPY_VALUE(zv, val1);
zv++;
ZVAL_COPY_VALUE(zv, val2);
return ht;
}
ZEND_API void ZEND_FASTCALL zend_hash_packed_grow(HashTable *ht)
{
HT_ASSERT_RC1(ht);
if (ht->nTableSize >= HT_MAX_SIZE) {
zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (%u * %zu + %zu)", ht->nTableSize * 2, sizeof(Bucket), sizeof(Bucket));
}
uint32_t newTableSize = ht->nTableSize * 2;
HT_SET_DATA_ADDR(ht, perealloc2(HT_GET_DATA_ADDR(ht), HT_PACKED_SIZE_EX(newTableSize, HT_MIN_MASK), HT_PACKED_USED_SIZE(ht), GC_FLAGS(ht) & IS_ARRAY_PERSISTENT));
ht->nTableSize = newTableSize;
}
ZEND_API void ZEND_FASTCALL zend_hash_real_init(HashTable *ht, bool packed)
{
IS_CONSISTENT(ht);
HT_ASSERT_RC1(ht);
zend_hash_real_init_ex(ht, packed);
}
ZEND_API void ZEND_FASTCALL zend_hash_real_init_packed(HashTable *ht)
{
IS_CONSISTENT(ht);
HT_ASSERT_RC1(ht);
zend_hash_real_init_packed_ex(ht);
}
ZEND_API void ZEND_FASTCALL zend_hash_real_init_mixed(HashTable *ht)
{
IS_CONSISTENT(ht);
HT_ASSERT_RC1(ht);
zend_hash_real_init_mixed_ex(ht);
}
ZEND_API void ZEND_FASTCALL zend_hash_packed_to_hash(HashTable *ht)
{
void *new_data, *old_data = HT_GET_DATA_ADDR(ht);
zval *src = ht->arPacked;
Bucket *dst;
uint32_t i;
uint32_t nSize = ht->nTableSize;
ZEND_ASSERT(HT_SIZE_TO_MASK(nSize));
HT_ASSERT_RC1(ht);
// Alloc before assign to avoid inconsistencies on OOM
new_data = pemalloc(HT_SIZE_EX(nSize, HT_SIZE_TO_MASK(nSize)), GC_FLAGS(ht) & IS_ARRAY_PERSISTENT);
HT_FLAGS(ht) &= ~HASH_FLAG_PACKED;
ht->nTableMask = HT_SIZE_TO_MASK(ht->nTableSize);
HT_SET_DATA_ADDR(ht, new_data);
dst = ht->arData;
for (i = 0; i < ht->nNumUsed; i++) {
ZVAL_COPY_VALUE(&dst->val, src);
dst->h = i;
dst->key = NULL;
dst++;
src++;
}
pefree(old_data, GC_FLAGS(ht) & IS_ARRAY_PERSISTENT);
zend_hash_rehash(ht);
}
ZEND_API void ZEND_FASTCALL zend_hash_to_packed(HashTable *ht)
{
void *new_data, *old_data = HT_GET_DATA_ADDR(ht);
Bucket *src = ht->arData;
zval *dst;
uint32_t i;
HT_ASSERT_RC1(ht);
new_data = pemalloc(HT_PACKED_SIZE_EX(ht->nTableSize, HT_MIN_MASK), GC_FLAGS(ht) & IS_ARRAY_PERSISTENT);
HT_FLAGS(ht) |= HASH_FLAG_PACKED | HASH_FLAG_STATIC_KEYS;
ht->nTableMask = HT_MIN_MASK;
HT_SET_DATA_ADDR(ht, new_data);
HT_HASH_RESET_PACKED(ht);
dst = ht->arPacked;
for (i = 0; i < ht->nNumUsed; i++) {
ZVAL_COPY_VALUE(dst, &src->val);
dst++;
src++;
}
pefree(old_data, GC_FLAGS(ht) & IS_ARRAY_PERSISTENT);
}
ZEND_API void ZEND_FASTCALL zend_hash_extend(HashTable *ht, uint32_t nSize, bool packed)
{
HT_ASSERT_RC1(ht);
if (nSize == 0) return;
ZEND_ASSERT(HT_SIZE_TO_MASK(nSize));
if (UNEXPECTED(HT_FLAGS(ht) & HASH_FLAG_UNINITIALIZED)) {
if (nSize > ht->nTableSize) {
ht->nTableSize = zend_hash_check_size(nSize);
}
zend_hash_real_init(ht, packed);
} else {
if (packed) {
ZEND_ASSERT(HT_IS_PACKED(ht));
if (nSize > ht->nTableSize) {
uint32_t newTableSize = zend_hash_check_size(nSize);
HT_SET_DATA_ADDR(ht, perealloc2(HT_GET_DATA_ADDR(ht), HT_PACKED_SIZE_EX(newTableSize, HT_MIN_MASK), HT_PACKED_USED_SIZE(ht), GC_FLAGS(ht) & IS_ARRAY_PERSISTENT));
ht->nTableSize = newTableSize;
}
} else {
ZEND_ASSERT(!HT_IS_PACKED(ht));
if (nSize > ht->nTableSize) {
void *new_data, *old_data = HT_GET_DATA_ADDR(ht);
Bucket *old_buckets = ht->arData;
nSize = zend_hash_check_size(nSize);
new_data = pemalloc(HT_SIZE_EX(nSize, HT_SIZE_TO_MASK(nSize)), GC_FLAGS(ht) & IS_ARRAY_PERSISTENT);
ht->nTableSize = nSize;
ht->nTableMask = HT_SIZE_TO_MASK(ht->nTableSize);
HT_SET_DATA_ADDR(ht, new_data);
memcpy(ht->arData, old_buckets, sizeof(Bucket) * ht->nNumUsed);
pefree(old_data, GC_FLAGS(ht) & IS_ARRAY_PERSISTENT);
zend_hash_rehash(ht);
}
}
}
}
ZEND_API void ZEND_FASTCALL zend_hash_discard(HashTable *ht, uint32_t nNumUsed)
{
Bucket *p, *end, *arData;
uint32_t nIndex;
ZEND_ASSERT(!HT_IS_PACKED(ht));
arData = ht->arData;
p = arData + ht->nNumUsed;
end = arData + nNumUsed;
ht->nNumUsed = nNumUsed;
while (p != end) {
p--;
if (UNEXPECTED(Z_TYPE(p->val) == IS_UNDEF)) continue;
ht->nNumOfElements--;
/* Collision pointers always directed from higher to lower buckets */
#if 0
if (!(Z_NEXT(p->val) == HT_INVALID_IDX || HT_HASH_TO_BUCKET_EX(arData, Z_NEXT(p->val)) < p)) {
abort();
}
#endif
nIndex = p->h | ht->nTableMask;
HT_HASH_EX(arData, nIndex) = Z_NEXT(p->val);
}
}
static uint32_t zend_array_recalc_elements(HashTable *ht)
{
zval *val;
uint32_t num = ht->nNumOfElements;
ZEND_HASH_MAP_FOREACH_VAL(ht, val) {
if (Z_TYPE_P(val) == IS_INDIRECT) {
if (UNEXPECTED(Z_TYPE_P(Z_INDIRECT_P(val)) == IS_UNDEF)) {
num--;
}
}
} ZEND_HASH_FOREACH_END();
return num;
}
/* }}} */
ZEND_API uint32_t zend_array_count(HashTable *ht)
{
uint32_t num;
if (UNEXPECTED(HT_FLAGS(ht) & HASH_FLAG_HAS_EMPTY_IND)) {
num = zend_array_recalc_elements(ht);
if (UNEXPECTED(ht->nNumOfElements == num)) {
HT_FLAGS(ht) &= ~HASH_FLAG_HAS_EMPTY_IND;
}
} else if (UNEXPECTED(ht == &EG(symbol_table))) {
num = zend_array_recalc_elements(ht);
} else {
num = zend_hash_num_elements(ht);
}
return num;
}
/* }}} */
static zend_always_inline HashPosition _zend_hash_get_valid_pos(const HashTable *ht, HashPosition pos)
{
if (HT_IS_PACKED(ht)) {
while (pos < ht->nNumUsed && Z_ISUNDEF(ht->arPacked[pos])) {
pos++;
}
} else {
while (pos < ht->nNumUsed && Z_ISUNDEF(ht->arData[pos].val)) {
pos++;
}
}
return pos;
}
static zend_always_inline HashPosition _zend_hash_get_current_pos(const HashTable *ht)
{
return _zend_hash_get_valid_pos(ht, ht->nInternalPointer);
}
ZEND_API HashPosition ZEND_FASTCALL zend_hash_get_current_pos(const HashTable *ht)
{
return _zend_hash_get_current_pos(ht);
}
static void zend_hash_remove_iterator_copies(uint32_t idx) {
HashTableIterator *iterators = EG(ht_iterators);
HashTableIterator *iter = iterators + idx;
uint32_t next_idx = iter->next_copy;
while (next_idx != idx) {
uint32_t cur_idx = next_idx;
HashTableIterator *cur_iter = iterators + cur_idx;
next_idx = cur_iter->next_copy;
cur_iter->next_copy = cur_idx; // avoid recursion in zend_hash_iterator_del
zend_hash_iterator_del(cur_idx);
}
iter->next_copy = idx;
}
ZEND_API uint32_t ZEND_FASTCALL 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_ITERATORS_OVERFLOW(ht))) {
HT_INC_ITERATORS_COUNT(ht);
}
while (iter != end) {
if (iter->ht == NULL) {
iter->ht = ht;
iter->pos = pos;
idx = iter - EG(ht_iterators);
iter->next_copy = idx;
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);
iter->next_copy = idx;
EG(ht_iterators_used) = idx + 1;
return idx;
}
// To avoid losing track of the HashTable when separating arrays, we track all copies at once.
static zend_always_inline bool zend_hash_iterator_find_copy_pos(uint32_t idx, HashTable *ht) {
HashTableIterator *iter = EG(ht_iterators) + idx;
uint32_t next_idx = iter->next_copy;
if (EXPECTED(next_idx != idx)) {
HashTableIterator *copy_iter;
while (next_idx != idx) {
copy_iter = EG(ht_iterators) + next_idx;
if (copy_iter->ht == ht) {
// We have found the hashtable we are actually iterating over
// Now clean any intermittent copies and replace the original index by the found one
if (EXPECTED(iter->ht) && EXPECTED(iter->ht != HT_POISONED_PTR)
&& EXPECTED(!HT_ITERATORS_OVERFLOW(iter->ht))) {
HT_DEC_ITERATORS_COUNT(iter->ht);
}
if (EXPECTED(!HT_ITERATORS_OVERFLOW(ht))) {
HT_INC_ITERATORS_COUNT(ht);
}
iter->ht = copy_iter->ht;
iter->pos = copy_iter->pos;
zend_hash_remove_iterator_copies(idx);
return true;
}
next_idx = copy_iter->next_copy;
}
zend_hash_remove_iterator_copies(idx);
}
return false;
}
ZEND_API HashPosition ZEND_FASTCALL zend_hash_iterator_pos(uint32_t idx, HashTable *ht)
{
HashTableIterator *iter = EG(ht_iterators) + idx;
ZEND_ASSERT(idx != (uint32_t)-1);
if (UNEXPECTED(iter->ht != ht) && !zend_hash_iterator_find_copy_pos(idx, ht)) {
if (EXPECTED(iter->ht) && EXPECTED(iter->ht != HT_POISONED_PTR)
&& EXPECTED(!HT_ITERATORS_OVERFLOW(iter->ht))) {
HT_DEC_ITERATORS_COUNT(iter->ht);
}
if (EXPECTED(!HT_ITERATORS_OVERFLOW(ht))) {
HT_INC_ITERATORS_COUNT(ht);
}
iter->ht = ht;
iter->pos = _zend_hash_get_current_pos(ht);
}
return iter->pos;
}
ZEND_API HashPosition ZEND_FASTCALL zend_hash_iterator_pos_ex(uint32_t idx, zval *array)
{
HashTable *ht = Z_ARRVAL_P(array);
HashTableIterator *iter = EG(ht_iterators) + idx;
ZEND_ASSERT(idx != (uint32_t)-1);
if (UNEXPECTED(iter->ht != ht) && !zend_hash_iterator_find_copy_pos(idx, ht)) {
if (EXPECTED(iter->ht) && EXPECTED(iter->ht != HT_POISONED_PTR)
&& EXPECTED(!HT_ITERATORS_OVERFLOW(ht))) {
HT_DEC_ITERATORS_COUNT(iter->ht);
}
SEPARATE_ARRAY(array);
ht = Z_ARRVAL_P(array);
if (EXPECTED(!HT_ITERATORS_OVERFLOW(ht))) {
HT_INC_ITERATORS_COUNT(ht);
}
iter->ht = ht;
iter->pos = _zend_hash_get_current_pos(ht);
}
return iter->pos;
}
ZEND_API void ZEND_FASTCALL 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 != HT_POISONED_PTR)
&& EXPECTED(!HT_ITERATORS_OVERFLOW(iter->ht))) {
ZEND_ASSERT(HT_ITERATORS_COUNT(iter->ht) != 0);
HT_DEC_ITERATORS_COUNT(iter->ht);
}
iter->ht = NULL;
if (UNEXPECTED(iter->next_copy != idx)) {
zend_hash_remove_iterator_copies(idx);
}
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_FASTCALL _zend_hash_iterators_remove(HashTable *ht)
{
HashTableIterator *iter = EG(ht_iterators);
HashTableIterator *end = iter + EG(ht_iterators_used);
while (iter != end) {
if (iter->ht == ht) {
iter->ht = HT_POISONED_PTR;
}
iter++;
}
}
static zend_always_inline void zend_hash_iterators_remove(HashTable *ht)
{
if (UNEXPECTED(HT_HAS_ITERATORS(ht))) {
_zend_hash_iterators_remove(ht);
}
}
ZEND_API HashPosition ZEND_FASTCALL zend_hash_iterators_lower_pos(HashTable *ht, HashPosition start)
{
HashTableIterator *iter = EG(ht_iterators);
HashTableIterator *end = iter + EG(ht_iterators_used);
HashPosition res = ht->nNumUsed;
while (iter != end) {
if (iter->ht == ht) {
if (iter->pos >= start && iter->pos < res) {
res = iter->pos;
}
}
iter++;
}
return res;
}
ZEND_API void ZEND_FASTCALL _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++;
}
}
ZEND_API void ZEND_FASTCALL zend_hash_iterators_advance(HashTable *ht, HashPosition step)
{
HashTableIterator *iter = EG(ht_iterators);
HashTableIterator *end = iter + EG(ht_iterators_used);
while (iter != end) {
if (iter->ht == ht) {
iter->pos += step;
}
iter++;
}
}
/* Hash must be known and precomputed before */
static zend_always_inline Bucket *zend_hash_find_bucket(const HashTable *ht, const zend_string *key)
{
uint32_t nIndex;
uint32_t idx;
Bucket *p, *arData;
ZEND_ASSERT(ZSTR_H(key) != 0 && "Hash must be known");
arData = ht->arData;
nIndex = ZSTR_H(key) | ht->nTableMask;
idx = HT_HASH_EX(arData, nIndex);
if (UNEXPECTED(idx == HT_INVALID_IDX)) {
return NULL;
}
p = HT_HASH_TO_BUCKET_EX(arData, idx);
if (EXPECTED(p->key == key)) { /* check for the same interned string */
return p;
}
while (1) {
if (p->h == ZSTR_H(key) &&
EXPECTED(p->key) &&
zend_string_equal_content(p->key, key)) {
return p;
}
idx = Z_NEXT(p->val);
if (idx == HT_INVALID_IDX) {
return NULL;
}
p = HT_HASH_TO_BUCKET_EX(arData, idx);
if (p->key == key) { /* check for the same interned string */
return p;
}
}
}
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, *arData;
arData = ht->arData;
nIndex = h | ht->nTableMask;
idx = HT_HASH_EX(arData, nIndex);
while (idx != HT_INVALID_IDX) {
ZEND_ASSERT(idx < HT_IDX_TO_HASH(ht->nTableSize));
p = HT_HASH_TO_BUCKET_EX(arData, idx);
if ((p->h == h)
&& p->key
&& zend_string_equals_cstr(p->key, 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, *arData;
arData = ht->arData;
nIndex = h | ht->nTableMask;
idx = HT_HASH_EX(arData, nIndex);
while (idx != HT_INVALID_IDX) {
ZEND_ASSERT(idx < HT_IDX_TO_HASH(ht->nTableSize));
p = HT_HASH_TO_BUCKET_EX(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_ulong h;
uint32_t nIndex;
uint32_t idx;
Bucket *p, *arData;
IS_CONSISTENT(ht);
HT_ASSERT_RC1(ht);
zend_string_hash_val(key);
if (UNEXPECTED(HT_FLAGS(ht) & (HASH_FLAG_UNINITIALIZED|HASH_FLAG_PACKED))) {
if (EXPECTED(HT_FLAGS(ht) & HASH_FLAG_UNINITIALIZED)) {
zend_hash_real_init_mixed(ht);
goto add_to_hash;
} else {
zend_hash_packed_to_hash(ht);
}
} else if ((flag & HASH_ADD_NEW) == 0 || ZEND_DEBUG) {
p = zend_hash_find_bucket(ht, key);
if (p) {
zval *data;
ZEND_ASSERT((flag & HASH_ADD_NEW) == 0);
if (flag & HASH_LOOKUP) {
return &p->val;
} else if (flag & HASH_ADD) {
if (!(flag & HASH_UPDATE_INDIRECT)) {
return NULL;
}
ZEND_ASSERT(&p->val != pData);
data = &p->val;
if (Z_TYPE_P(data) == IS_INDIRECT) {
data = Z_INDIRECT_P(data);
if (Z_TYPE_P(data) != IS_UNDEF) {
return NULL;
}
} else {
return NULL;
}
} else {
ZEND_ASSERT(&p->val != pData);
data = &p->val;
if ((flag & HASH_UPDATE_INDIRECT) && Z_TYPE_P(data) == IS_INDIRECT) {
data = Z_INDIRECT_P(data);
}
}
if (ht->pDestructor) {
ht->pDestructor(data);
}
ZVAL_COPY_VALUE(data, pData);
return data;
}
}
ZEND_HASH_IF_FULL_DO_RESIZE(ht); /* If the Hash table is full, resize it */
add_to_hash:
if (!ZSTR_IS_INTERNED(key)) {
zend_string_addref(key);
HT_FLAGS(ht) &= ~HASH_FLAG_STATIC_KEYS;
}
idx = ht->nNumUsed++;
ht->nNumOfElements++;
arData = ht->arData;
p = arData + idx;
p->key = key;
p->h = h = ZSTR_H(key);
nIndex = h | ht->nTableMask;
Z_NEXT(p->val) = HT_HASH_EX(arData, nIndex);
HT_HASH_EX(arData, nIndex) = HT_IDX_TO_HASH(idx);
if (flag & HASH_LOOKUP) {
ZVAL_NULL(&p->val);
} else {
ZVAL_COPY_VALUE(&p->val, pData);
}
return &p->val;
}
static zend_always_inline zval *_zend_hash_str_add_or_update_i(HashTable *ht, const char *str, size_t len, zend_ulong h, zval *pData, uint32_t flag)
{
zend_string *key;
uint32_t nIndex;
uint32_t idx;
Bucket *p;
IS_CONSISTENT(ht);
HT_ASSERT_RC1(ht);
if (UNEXPECTED(HT_FLAGS(ht) & (HASH_FLAG_UNINITIALIZED|HASH_FLAG_PACKED))) {
if (EXPECTED(HT_FLAGS(ht) & HASH_FLAG_UNINITIALIZED)) {
zend_hash_real_init_mixed(ht);
goto add_to_hash;
} else {
zend_hash_packed_to_hash(ht);
}
} else if ((flag & HASH_ADD_NEW) == 0) {
p = zend_hash_str_find_bucket(ht, str, len, h);
if (p) {
zval *data;
if (flag & HASH_LOOKUP) {
return &p->val;
} else if (flag & HASH_ADD) {
if (!(flag & HASH_UPDATE_INDIRECT)) {
return NULL;
}
ZEND_ASSERT(&p->val != pData);
data = &p->val;
if (Z_TYPE_P(data) == IS_INDIRECT) {
data = Z_INDIRECT_P(data);
if (Z_TYPE_P(data) != IS_UNDEF) {
return NULL;
}
} else {
return NULL;
}
} else {
ZEND_ASSERT(&p->val != pData);
data = &p->val;
if ((flag & HASH_UPDATE_INDIRECT) && Z_TYPE_P(data) == IS_INDIRECT) {
data = Z_INDIRECT_P(data);
}
}
if (ht->pDestructor) {
ht->pDestructor(data);
}
ZVAL_COPY_VALUE(data, pData);
return data;
}
}
ZEND_HASH_IF_FULL_DO_RESIZE(ht); /* If the Hash table is full, resize it */
add_to_hash:
idx = ht->nNumUsed++;
ht->nNumOfElements++;
p = ht->arData + idx;
p->key = key = zend_string_init(str, len, GC_FLAGS(ht) & IS_ARRAY_PERSISTENT);
#if ZEND_RC_DEBUG
if (GC_FLAGS(ht) & GC_PERSISTENT_LOCAL) {
GC_MAKE_PERSISTENT_LOCAL(key);
}
#endif
p->h = ZSTR_H(key) = h;
HT_FLAGS(ht) &= ~HASH_FLAG_STATIC_KEYS;
if (flag & HASH_LOOKUP) {
ZVAL_NULL(&p->val);
} else {
ZVAL_COPY_VALUE(&p->val, pData);
}
nIndex = h | ht->nTableMask;
Z_NEXT(p->val) = HT_HASH(ht, nIndex);
HT_HASH(ht, nIndex) = HT_IDX_TO_HASH(idx);
return &p->val;
}
ZEND_API zval* ZEND_FASTCALL zend_hash_add_or_update(HashTable *ht, zend_string *key, zval *pData, uint32_t flag)
{
if (flag == HASH_ADD) {
return zend_hash_add(ht, key, pData);
} else if (flag == HASH_ADD_NEW) {
return zend_hash_add_new(ht, key, pData);
} else if (flag == HASH_UPDATE) {
return zend_hash_update(ht, key, pData);
} else {
ZEND_ASSERT(flag == (HASH_UPDATE|HASH_UPDATE_INDIRECT));
return zend_hash_update_ind(ht, key, pData);
}
}
ZEND_API zval* ZEND_FASTCALL zend_hash_add(HashTable *ht, zend_string *key, zval *pData)
{
return _zend_hash_add_or_update_i(ht, key, pData, HASH_ADD);
}
ZEND_API zval* ZEND_FASTCALL zend_hash_update(HashTable *ht, zend_string *key, zval *pData)
{
return _zend_hash_add_or_update_i(ht, key, pData, HASH_UPDATE);
}
ZEND_API zval* ZEND_FASTCALL zend_hash_update_ind(HashTable *ht, zend_string *key, zval *pData)
{
return _zend_hash_add_or_update_i(ht, key, pData, HASH_UPDATE | HASH_UPDATE_INDIRECT);
}