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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2014 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@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/

/* $Id$ */

#define ZEND_INTENSIVE_DEBUGGING 0

#include <stdio.h>
#include <signal.h>

#include "zend.h"
#include "zend_compile.h"
#include "zend_execute.h"
#include "zend_API.h"
#include "zend_ptr_stack.h"
#include "zend_constants.h"
#include "zend_extensions.h"
#include "zend_ini.h"
#include "zend_exceptions.h"
#include "zend_interfaces.h"
#include "zend_closures.h"
#include "zend_generators.h"
#include "zend_vm.h"
#include "zend_dtrace.h"

/* Virtual current working directory support */
#include "zend_virtual_cwd.h"

#define _CONST_CODE 0
#define _TMP_CODE 1
#define _VAR_CODE 2
#define _UNUSED_CODE 3
#define _CV_CODE 4

typedef int (*incdec_t)(zval *);

#define get_zval_ptr(op_type, node, ex, should_free, type) _get_zval_ptr(op_type, node, ex, should_free, type TSRMLS_CC)
#define get_zval_ptr_ptr(op_type, node, ex, should_free, type) _get_zval_ptr_ptr(op_type, node, ex, should_free, type TSRMLS_CC)
#define get_obj_zval_ptr(op_type, node, ex, should_free, type) _get_obj_zval_ptr(op_type, node, ex, should_free, type TSRMLS_CC)
#define get_obj_zval_ptr_ptr(op_type, node, ex, should_free, type) _get_obj_zval_ptr_ptr(op_type, node, ex, should_free, type TSRMLS_CC)

/* Prototypes */
static void zend_extension_statement_handler(const zend_extension *extension, zend_op_array *op_array TSRMLS_DC);
static void zend_extension_fcall_begin_handler(const zend_extension *extension, zend_op_array *op_array TSRMLS_DC);
static void zend_extension_fcall_end_handler(const zend_extension *extension, zend_op_array *op_array TSRMLS_DC);

#define RETURN_VALUE_USED(opline) (!((opline)->result_type & EXT_TYPE_UNUSED))

#define EX_T(offset) (*EX_TMP_VAR(execute_data, offset))
#define EX_CV(var) (*EX_CV_NUM(execute_data, var))

#define TEMP_VAR_STACK_LIMIT 2000

static zend_always_inline void zend_pzval_unlock_func(zval *z, zend_free_op *should_free, int unref TSRMLS_DC)
{
if (!Z_DELREF_P(z)) {
Z_SET_REFCOUNT_P(z, 1);
Z_UNSET_ISREF_P(z);
should_free->var = z;
/* should_free->is_var = 1; */
} else {
should_free->var = 0;
if (unref && Z_ISREF_P(z) && Z_REFCOUNT_P(z) == 1) {
Z_UNSET_ISREF_P(z);
}
}
}

static zend_always_inline void zend_pzval_unlock_free_func(zval *z TSRMLS_DC)
{
if (!Z_DELREF_P(z)) {
ZEND_ASSERT(z != &EG(uninitialized_zval));
GC_REMOVE_ZVAL_FROM_BUFFER(z);
zval_dtor(z);
efree(z);
}
}

#undef zval_ptr_dtor
#define zval_ptr_dtor(pzv) i_zval_ptr_dtor(*(pzv) ZEND_FILE_LINE_CC TSRMLS_CC)
#define zval_ptr_dtor_nogc(pzv) i_zval_ptr_dtor_nogc(*(pzv) ZEND_FILE_LINE_CC TSRMLS_CC)

#define PZVAL_UNLOCK(z, f) zend_pzval_unlock_func(z, f, 1 TSRMLS_CC)
#define PZVAL_UNLOCK_EX(z, f, u) zend_pzval_unlock_func(z, f, u TSRMLS_CC)
#define PZVAL_UNLOCK_FREE(z) zend_pzval_unlock_free_func(z TSRMLS_CC)
#define PZVAL_LOCK(z) Z_ADDREF_P((z))
#define SELECTIVE_PZVAL_LOCK(pzv, opline) if (RETURN_VALUE_USED(opline)) { PZVAL_LOCK(pzv); }

#define EXTRACT_ZVAL_PTR(t) do { \
temp_variable *__t = (t); \
__t->var.ptr = *__t->var.ptr_ptr; \
__t->var.ptr_ptr = &__t->var.ptr; \
if (!PZVAL_IS_REF(__t->var.ptr) && \
Z_REFCOUNT_P(__t->var.ptr) > 2) { \
SEPARATE_ZVAL(__t->var.ptr_ptr); \
} \
} while (0)

#define AI_SET_PTR(t, val) do { \
temp_variable *__t = (t); \
__t->var.ptr = (val); \
__t->var.ptr_ptr = &__t->var.ptr; \
} while (0)

#define FREE_OP(should_free) \
if (should_free.var) { \
if ((zend_uintptr_t)should_free.var & 1L) { \
zval_dtor((zval*)((zend_uintptr_t)should_free.var & ~1L)); \
} else { \
zval_ptr_dtor_nogc(&should_free.var); \
} \
}

#define FREE_OP_IF_VAR(should_free) \
if (should_free.var != NULL && (((zend_uintptr_t)should_free.var & 1L) == 0)) { \
zval_ptr_dtor_nogc(&should_free.var); \
}

#define FREE_OP_VAR_PTR(should_free) \
if (should_free.var) { \
zval_ptr_dtor_nogc(&should_free.var); \
}

#define TMP_FREE(z) (zval*)(((zend_uintptr_t)(z)) | 1L)

#define IS_TMP_FREE(should_free) ((zend_uintptr_t)should_free.var & 1L)

#define MAKE_REAL_ZVAL_PTR(val) \
do { \
zval *_tmp; \
ALLOC_ZVAL(_tmp); \
INIT_PZVAL_COPY(_tmp, (val)); \
(val) = _tmp; \
} while (0)

/* End of zend_execute_locks.h */

#define CV_DEF_OF(i) (EG(active_op_array)->vars[i])

#define CTOR_CALL_BIT 0x1
#define CTOR_USED_BIT 0x2

#define IS_CTOR_CALL(ce) (((zend_uintptr_t)(ce)) & CTOR_CALL_BIT)
#define IS_CTOR_USED(ce) (((zend_uintptr_t)(ce)) & CTOR_USED_BIT)

#define ENCODE_CTOR(ce, used) \
((zend_class_entry*)(((zend_uintptr_t)(ce)) | CTOR_CALL_BIT | ((used) ? CTOR_USED_BIT : 0)))
#define DECODE_CTOR(ce) \
((zend_class_entry*)(((zend_uintptr_t)(ce)) & ~(CTOR_CALL_BIT|CTOR_USED_BIT)))

#undef EX
#define EX(element) execute_data->element

ZEND_API zval** zend_get_compiled_variable_value(const zend_execute_data *execute_data, zend_uint var)
{
return EX_CV(var);
}

static zend_always_inline zval *_get_zval_ptr_tmp(zend_uint var, const zend_execute_data *execute_data, zend_free_op *should_free TSRMLS_DC)
{
return should_free->var = &EX_T(var).tmp_var;
}

static zend_always_inline zval *_get_zval_ptr_var(zend_uint var, const zend_execute_data *execute_data, zend_free_op *should_free TSRMLS_DC)
{
zval *ptr = EX_T(var).var.ptr;

return should_free->var = ptr;
}

static zend_never_inline zval **_get_zval_cv_lookup(zval ***ptr, zend_uint var, int type TSRMLS_DC)
{
zend_compiled_variable *cv = &CV_DEF_OF(var);

if (!EG(active_symbol_table) ||
zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
switch (type) {
case BP_VAR_R:
case BP_VAR_UNSET:
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
/* break missing intentionally */
case BP_VAR_IS:
return &EG(uninitialized_zval_ptr);
break;
case BP_VAR_RW:
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
/* break missing intentionally */
case BP_VAR_W:
Z_ADDREF(EG(uninitialized_zval));
if (!EG(active_symbol_table)) {
*ptr = (zval**)EX_CV_NUM(EG(current_execute_data), EG(active_op_array)->last_var + var);
**ptr = &EG(uninitialized_zval);
} else {
zend_hash_quick_update(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, &EG(uninitialized_zval_ptr), sizeof(zval *), (void **)ptr);
}
break;
}
}
return *ptr;
}

static zend_never_inline zval **_get_zval_cv_lookup_BP_VAR_R(zval ***ptr, zend_uint var TSRMLS_DC)
{
zend_compiled_variable *cv = &CV_DEF_OF(var);

if (!EG(active_symbol_table) ||
zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
return &EG(uninitialized_zval_ptr);
}
return *ptr;
}

static zend_never_inline zval **_get_zval_cv_lookup_BP_VAR_UNSET(zval ***ptr, zend_uint var TSRMLS_DC)
{
zend_compiled_variable *cv = &CV_DEF_OF(var);

if (!EG(active_symbol_table) ||
zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
return &EG(uninitialized_zval_ptr);
}
return *ptr;
}

static zend_never_inline zval **_get_zval_cv_lookup_BP_VAR_IS(zval ***ptr, zend_uint var TSRMLS_DC)
{
zend_compiled_variable *cv = &CV_DEF_OF(var);

if (!EG(active_symbol_table) ||
zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
return &EG(uninitialized_zval_ptr);
}
return *ptr;
}

static zend_never_inline zval **_get_zval_cv_lookup_BP_VAR_RW(zval ***ptr, zend_uint var TSRMLS_DC)
{
zend_compiled_variable *cv = &CV_DEF_OF(var);

if (!EG(active_symbol_table)) {
Z_ADDREF(EG(uninitialized_zval));
*ptr = (zval**)EX_CV_NUM(EG(current_execute_data), EG(active_op_array)->last_var + var);
**ptr = &EG(uninitialized_zval);
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
} else if (zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
Z_ADDREF(EG(uninitialized_zval));
zend_hash_quick_update(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, &EG(uninitialized_zval_ptr), sizeof(zval *), (void **)ptr);
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
}
return *ptr;
}

static zend_never_inline zval **_get_zval_cv_lookup_BP_VAR_W(zval ***ptr, zend_uint var TSRMLS_DC)
{
zend_compiled_variable *cv = &CV_DEF_OF(var);

if (!EG(active_symbol_table)) {
Z_ADDREF(EG(uninitialized_zval));
*ptr = (zval**)EX_CV_NUM(EG(current_execute_data), EG(active_op_array)->last_var + var);
**ptr = &EG(uninitialized_zval);
} else if (zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
Z_ADDREF(EG(uninitialized_zval));
zend_hash_quick_update(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, &EG(uninitialized_zval_ptr), sizeof(zval *), (void **)ptr);
}
return *ptr;
}

static zend_always_inline zval *_get_zval_ptr_cv(zend_uint var, int type TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(EG(current_execute_data), var);

if (UNEXPECTED(*ptr == NULL)) {
return *_get_zval_cv_lookup(ptr, var, type TSRMLS_CC);
}
return **ptr;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_R(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);

if (UNEXPECTED(*ptr == NULL)) {
return *_get_zval_cv_lookup_BP_VAR_R(ptr, var TSRMLS_CC);
}
return **ptr;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_UNSET(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);

if (UNEXPECTED(*ptr == NULL)) {
return *_get_zval_cv_lookup_BP_VAR_UNSET(ptr, var TSRMLS_CC);
}
return **ptr;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_IS(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);

if (UNEXPECTED(*ptr == NULL)) {
return *_get_zval_cv_lookup_BP_VAR_IS(ptr, var TSRMLS_CC);
}
return **ptr;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_RW(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);

if (UNEXPECTED(*ptr == NULL)) {
return *_get_zval_cv_lookup_BP_VAR_RW(ptr, var TSRMLS_CC);
}
return **ptr;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_W(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);

if (UNEXPECTED(*ptr == NULL)) {
return *_get_zval_cv_lookup_BP_VAR_W(ptr, var TSRMLS_CC);
}
return **ptr;
}

static inline zval *_get_zval_ptr(int op_type, const znode_op *node, const zend_execute_data *execute_data, zend_free_op *should_free, int type TSRMLS_DC)
{
/* should_free->is_var = 0; */
switch (op_type) {
case IS_CONST:
should_free->var = 0;
return node->zv;
break;
case IS_TMP_VAR:
should_free->var = TMP_FREE(&EX_T(node->var).tmp_var);
return &EX_T(node->var).tmp_var;
break;
case IS_VAR:
return _get_zval_ptr_var(node->var, execute_data, should_free TSRMLS_CC);
break;
case IS_UNUSED:
should_free->var = 0;
return NULL;
break;
case IS_CV:
should_free->var = 0;
return _get_zval_ptr_cv(node->var, type TSRMLS_CC);
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
return NULL;
}

static zend_always_inline zval **_get_zval_ptr_ptr_var(zend_uint var, const zend_execute_data *execute_data, zend_free_op *should_free TSRMLS_DC)
{
zval** ptr_ptr = EX_T(var).var.ptr_ptr;

if (EXPECTED(ptr_ptr != NULL)) {
PZVAL_UNLOCK(*ptr_ptr, should_free);
} else {
/* string offset */
PZVAL_UNLOCK(EX_T(var).str_offset.str, should_free);
}
return ptr_ptr;
}

static zend_always_inline zval **_get_zval_ptr_ptr_var_fast(zend_uint var, const zend_execute_data *execute_data, zend_free_op *should_free TSRMLS_DC)
{
zval** ptr_ptr = EX_T(var).var.ptr_ptr;

if (EXPECTED(ptr_ptr != NULL)) {
should_free->var = *ptr_ptr;
} else {
/* string offset */
should_free->var = EX_T(var).str_offset.str;
}
return ptr_ptr;
}

static zend_always_inline zval **_get_zval_ptr_ptr_cv(zend_uint var, int type TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(EG(current_execute_data), var);

if (UNEXPECTED(*ptr == NULL)) {
return _get_zval_cv_lookup(ptr, var, type TSRMLS_CC);
}
return *ptr;
}

static zend_always_inline zval **_get_zval_ptr_ptr_cv_BP_VAR_R(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);

if (UNEXPECTED(*ptr == NULL)) {
return _get_zval_cv_lookup_BP_VAR_R(ptr, var TSRMLS_CC);
}
return *ptr;
}

static zend_always_inline zval **_get_zval_ptr_ptr_cv_BP_VAR_UNSET(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);

if (UNEXPECTED(*ptr == NULL)) {
return _get_zval_cv_lookup_BP_VAR_UNSET(ptr, var TSRMLS_CC);
}
return *ptr;
}

static zend_always_inline zval **_get_zval_ptr_ptr_cv_BP_VAR_IS(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);

if (UNEXPECTED(*ptr == NULL)) {
return _get_zval_cv_lookup_BP_VAR_IS(ptr, var TSRMLS_CC);
}
return *ptr;
}

static zend_always_inline zval **_get_zval_ptr_ptr_cv_BP_VAR_RW(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);

if (UNEXPECTED(*ptr == NULL)) {
return _get_zval_cv_lookup_BP_VAR_RW(ptr, var TSRMLS_CC);
}
return *ptr;
}

static zend_always_inline zval **_get_zval_ptr_ptr_cv_BP_VAR_W(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);

if (UNEXPECTED(*ptr == NULL)) {
return _get_zval_cv_lookup_BP_VAR_W(ptr, var TSRMLS_CC);
}
return *ptr;
}

static inline zval **_get_zval_ptr_ptr(int op_type, const znode_op *node, const zend_execute_data *execute_data, zend_free_op *should_free, int type TSRMLS_DC)
{
if (op_type == IS_CV) {
should_free->var = 0;
return _get_zval_ptr_ptr_cv(node->var, type TSRMLS_CC);
} else if (op_type == IS_VAR) {
return _get_zval_ptr_ptr_var(node->var, execute_data, should_free TSRMLS_CC);
} else {
should_free->var = 0;
return NULL;
}
}

static zend_always_inline zval *_get_obj_zval_ptr_unused(TSRMLS_D)
{
if (EXPECTED(EG(This) != NULL)) {
return EG(This);
} else {
zend_error_noreturn(E_ERROR, "Using $this when not in object context");
return NULL;
}
}

static inline zval **_get_obj_zval_ptr_ptr(int op_type, const znode_op *op, const zend_execute_data *execute_data, zend_free_op *should_free, int type TSRMLS_DC)
{
if (op_type == IS_UNUSED) {
if (EXPECTED(EG(This) != NULL)) {
/* this should actually never be modified, _ptr_ptr is modified only when
the object is empty */
should_free->var = 0;
return &EG(This);
} else {
zend_error_noreturn(E_ERROR, "Using $this when not in object context");
}
}
return get_zval_ptr_ptr(op_type, op, execute_data, should_free, type);
}

static zend_always_inline zval **_get_obj_zval_ptr_ptr_unused(TSRMLS_D)
{
if (EXPECTED(EG(This) != NULL)) {
return &EG(This);
} else {
zend_error_noreturn(E_ERROR, "Using $this when not in object context");
return NULL;
}
}

static inline zval *_get_obj_zval_ptr(int op_type, znode_op *op, const zend_execute_data *execute_data, zend_free_op *should_free, int type TSRMLS_DC)
{
if (op_type == IS_UNUSED) {
if (EXPECTED(EG(This) != NULL)) {
should_free->var = 0;
return EG(This);
} else {
zend_error_noreturn(E_ERROR, "Using $this when not in object context");
}
}
return get_zval_ptr(op_type, op, execute_data, should_free, type);
}

static void zend_assign_to_variable_reference(zval **variable_ptr_ptr, zval **value_ptr_ptr TSRMLS_DC)
{
zval *variable_ptr = *variable_ptr_ptr;
zval *value_ptr = *value_ptr_ptr;

if (variable_ptr == &EG(error_zval) || value_ptr == &EG(error_zval)) {
variable_ptr_ptr = &EG(uninitialized_zval_ptr);
} else if (variable_ptr != value_ptr) {
if (!PZVAL_IS_REF(value_ptr)) {
/* break it away */
Z_DELREF_P(value_ptr);
if (Z_REFCOUNT_P(value_ptr)>0) {
ALLOC_ZVAL(*value_ptr_ptr);
ZVAL_COPY_VALUE(*value_ptr_ptr, value_ptr);
value_ptr = *value_ptr_ptr;
zendi_zval_copy_ctor(*value_ptr);
}
Z_SET_REFCOUNT_P(value_ptr, 1);
Z_SET_ISREF_P(value_ptr);
}

*variable_ptr_ptr = value_ptr;
Z_ADDREF_P(value_ptr);

zval_ptr_dtor(&variable_ptr);
} else if (!Z_ISREF_P(variable_ptr)) {
if (variable_ptr_ptr == value_ptr_ptr) {
SEPARATE_ZVAL(variable_ptr_ptr);
} else if (variable_ptr==&EG(uninitialized_zval)
|| Z_REFCOUNT_P(variable_ptr)>2) {
/* we need to separate */
Z_SET_REFCOUNT_P(variable_ptr, Z_REFCOUNT_P(variable_ptr) - 2);
ALLOC_ZVAL(*variable_ptr_ptr);
ZVAL_COPY_VALUE(*variable_ptr_ptr, variable_ptr);
zval_copy_ctor(*variable_ptr_ptr);
*value_ptr_ptr = *variable_ptr_ptr;
Z_SET_REFCOUNT_PP(variable_ptr_ptr, 2);
}
Z_SET_ISREF_PP(variable_ptr_ptr);
}
}

/* this should modify object only if it's empty */
static inline void make_real_object(zval **object_ptr TSRMLS_DC)
{
if (Z_TYPE_PP(object_ptr) == IS_NULL
|| (Z_TYPE_PP(object_ptr) == IS_BOOL && Z_LVAL_PP(object_ptr) == 0)
|| (Z_TYPE_PP(object_ptr) == IS_STRING && Z_STRLEN_PP(object_ptr) == 0)
) {
SEPARATE_ZVAL_IF_NOT_REF(object_ptr);
zval_dtor(*object_ptr);
object_init(*object_ptr);
zend_error(E_WARNING, "Creating default object from empty value");
}
}

ZEND_API char * zend_verify_arg_class_kind(const zend_arg_info *cur_arg_info, ulong fetch_type, const char **class_name, zend_class_entry **pce TSRMLS_DC)
{
*pce = zend_fetch_class(cur_arg_info->class_name, cur_arg_info->class_name_len, (fetch_type | ZEND_FETCH_CLASS_AUTO | ZEND_FETCH_CLASS_NO_AUTOLOAD) TSRMLS_CC);

*class_name = (*pce) ? (*pce)->name: cur_arg_info->class_name;
if (*pce && (*pce)->ce_flags & ZEND_ACC_INTERFACE) {
return "implement interface ";
} else {
return "be an instance of ";
}
}

ZEND_API int zend_verify_arg_error(int error_type, const zend_function *zf, zend_uint arg_num, const char *need_msg, const char *need_kind, const char *given_msg, const char *given_kind TSRMLS_DC)
{
zend_execute_data *ptr = EG(current_execute_data)->prev_execute_data;
const char *fname = zf->common.function_name;
char *fsep;
const char *fclass;

if (zf->common.scope) {
fsep = "::";
fclass = zf->common.scope->name;
} else {
fsep = "";
fclass = "";
}

if (ptr && ptr->op_array) {
zend_error(error_type, "Argument %d passed to %s%s%s() must %s%s, %s%s given, called in %s on line %d and defined", arg_num, fclass, fsep, fname, need_msg, need_kind, given_msg, given_kind, ptr->op_array->filename, ptr->opline->lineno);
} else {
zend_error(error_type, "Argument %d passed to %s%s%s() must %s%s, %s%s given", arg_num, fclass, fsep, fname, need_msg, need_kind, given_msg, given_kind);
}
return 0;
}

static inline int zend_verify_arg_type(zend_function *zf, zend_uint arg_num, zval *arg, ulong fetch_type TSRMLS_DC)
{
zend_arg_info *cur_arg_info;
char *need_msg;
zend_class_entry *ce;

if (!zf->common.arg_info) {
return 1;
}

if (arg_num <= zf->common.num_args) {
cur_arg_info = &zf->common.arg_info[arg_num-1];
} else if (zf->common.fn_flags & ZEND_ACC_VARIADIC) {
cur_arg_info = &zf->common.arg_info[zf->common.num_args-1];
} else {
return 1;
}

if (cur_arg_info->class_name) {
const char *class_name;

if (!arg) {
need_msg = zend_verify_arg_class_kind(cur_arg_info, fetch_type, &class_name, &ce TSRMLS_CC);
return zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, need_msg, class_name, "none", "" TSRMLS_CC);
}
if (Z_TYPE_P(arg) == IS_OBJECT) {
need_msg = zend_verify_arg_class_kind(cur_arg_info, fetch_type, &class_name, &ce TSRMLS_CC);
if (!ce || !instanceof_function(Z_OBJCE_P(arg), ce TSRMLS_CC)) {
return zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, need_msg, class_name, "instance of ", Z_OBJCE_P(arg)->name TSRMLS_CC);
}
} else if (Z_TYPE_P(arg) != IS_NULL || !cur_arg_info->allow_null) {
need_msg = zend_verify_arg_class_kind(cur_arg_info, fetch_type, &class_name, &ce TSRMLS_CC);
return zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, need_msg, class_name, zend_zval_type_name(arg), "" TSRMLS_CC);
}
} else if (cur_arg_info->type_hint) {
switch(cur_arg_info->type_hint) {
case IS_ARRAY:
if (!arg) {
return zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be of the type array", "", "none", "" TSRMLS_CC);
}

if (Z_TYPE_P(arg) != IS_ARRAY && (Z_TYPE_P(arg) != IS_NULL || !cur_arg_info->allow_null)) {
return zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be of the type array", "", zend_zval_type_name(arg), "" TSRMLS_CC);
}
break;

case IS_CALLABLE:
if (!arg) {
return zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be callable", "", "none", "" TSRMLS_CC);
}
if (!zend_is_callable(arg, IS_CALLABLE_CHECK_SILENT, NULL TSRMLS_CC) && (Z_TYPE_P(arg) != IS_NULL || !cur_arg_info->allow_null)) {
return zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be callable", "", zend_zval_type_name(arg), "" TSRMLS_CC);
}
break;

default:
zend_error(E_ERROR, "Unknown typehint");
}
}
return 1;
}

static inline void zend_assign_to_object(zval **retval, zval **object_ptr, zval *property_name, int value_type, znode_op *value_op, const zend_execute_data *execute_data, int opcode, const zend_literal *key TSRMLS_DC)
{
zval *object = *object_ptr;
zend_free_op free_value;
  zval *value = get_zval_ptr(value_type, value_op, execute_data, &free_value, BP_VAR_R);

if (Z_TYPE_P(object) != IS_OBJECT) {
if (object == &EG(error_zval)) {
  if (retval) {
*retval = &EG(uninitialized_zval);
PZVAL_LOCK(*retval);
}
FREE_OP(free_value);
return;
}
if (Z_TYPE_P(object) == IS_NULL ||
(Z_TYPE_P(object) == IS_BOOL && Z_LVAL_P(object) == 0) ||
(Z_TYPE_P(object) == IS_STRING && Z_STRLEN_P(object) == 0)) {
SEPARATE_ZVAL_IF_NOT_REF(object_ptr);
object = *object_ptr;
Z_ADDREF_P(object);
zend_error(E_WARNING, "Creating default object from empty value");
if (Z_REFCOUNT_P(object) == 1) {
/* object was removed by error handler, nothing to assign to */
zval_ptr_dtor(&object);
if (retval) {
*retval = &EG(uninitialized_zval);
PZVAL_LOCK(*retval);
}
FREE_OP(free_value);
return;
}
Z_DELREF_P(object);
zval_dtor(object);
object_init(object);
} else {
zend_error(E_WARNING, "Attempt to assign property of non-object");
if (retval) {
*retval = &EG(uninitialized_zval);
PZVAL_LOCK(*retval);
}
FREE_OP(free_value);
return;
}
}

/* separate our value if necessary */
if (value_type == IS_TMP_VAR) {
zval *orig_value = value;

ALLOC_ZVAL(value);
ZVAL_COPY_VALUE(value, orig_value);
Z_UNSET_ISREF_P(value);
Z_SET_REFCOUNT_P(value, 0);
} else if (value_type == IS_CONST) {
zval *orig_value = value;

ALLOC_ZVAL(value);
ZVAL_COPY_VALUE(value, orig_value);
Z_UNSET_ISREF_P(value);
Z_SET_REFCOUNT_P(value, 0);
zval_copy_ctor(value);
}


Z_ADDREF_P(value);
if (opcode == ZEND_ASSIGN_OBJ) {
if (!Z_OBJ_HT_P(object)->write_property) {
zend_error(E_WARNING, "Attempt to assign property of non-object");
if (retval) {
*retval = &EG(uninitialized_zval);
PZVAL_LOCK(&EG(uninitialized_zval));
}
if (value_type == IS_TMP_VAR) {
FREE_ZVAL(value);
} else if (value_type == IS_CONST) {
zval_ptr_dtor(&value);
}
FREE_OP(free_value);
return;
}
Z_OBJ_HT_P(object)->write_property(object, property_name, value, key TSRMLS_CC);
} else {
/* Note: property_name in this case is really the array index! */
if (!Z_OBJ_HT_P(object)->write_dimension) {
zend_error_noreturn(E_ERROR, "Cannot use object as array");
}
Z_OBJ_HT_P(object)->write_dimension(object, property_name, value TSRMLS_CC);
}

if (retval && !EG(exception)) {
*retval = value;
PZVAL_LOCK(value);
}
zval_ptr_dtor(&value);
FREE_OP_IF_VAR(free_value);
}

static inline int zend_assign_to_string_offset(const temp_variable *T, const zval *value, int value_type TSRMLS_DC)
{
zval *str = T->str_offset.str;
zend_uint offset = T->str_offset.offset;
if (Z_TYPE_P(str) == IS_STRING) {
if ((int)offset < 0) {
zend_error(E_WARNING, "Illegal string offset: %d", offset);
return 0;
}

if (offset >= Z_STRLEN_P(str)) {
Z_STRVAL_P(str) = str_erealloc(Z_STRVAL_P(str), offset+1+1);
memset(Z_STRVAL_P(str) + Z_STRLEN_P(str), ' ', offset - Z_STRLEN_P(str));
Z_STRVAL_P(str)[offset+1] = 0;
Z_STRLEN_P(str) = offset+1;
} else if (IS_INTERNED(Z_STRVAL_P(str))) {
Z_STRVAL_P(str) = estrndup(Z_STRVAL_P(str), Z_STRLEN_P(str));
}

if (Z_TYPE_P(value) != IS_STRING) {
zval tmp;

ZVAL_COPY_VALUE(&tmp, value);
if (value_type != IS_TMP_VAR) {
zval_copy_ctor(&tmp);
}
convert_to_string(&tmp);
Z_STRVAL_P(str)[offset] = Z_STRVAL(tmp)[0];
str_efree(Z_STRVAL(tmp));
} else {
Z_STRVAL_P(str)[offset] = Z_STRVAL_P(value)[0];
if (value_type == IS_TMP_VAR) {
/* we can safely free final_value here
* because separation is done only
* in case value_type == IS_VAR */
str_efree(Z_STRVAL_P(value));
}
}
/*
* the value of an assignment to a string offset is undefined
T(result->u.var).var = &T->str_offset.str;
*/
}
return 1;
}


static inline zval* zend_assign_tmp_to_variable(zval **variable_ptr_ptr, zval *value TSRMLS_DC)
{
zval *variable_ptr = *variable_ptr_ptr;
zval garbage;

if (Z_TYPE_P(variable_ptr) == IS_OBJECT &&
UNEXPECTED(Z_OBJ_HANDLER_P(variable_ptr, set) != NULL)) {
Z_OBJ_HANDLER_P(variable_ptr, set)(variable_ptr_ptr, value TSRMLS_CC);
return variable_ptr;
}

  if (UNEXPECTED(Z_REFCOUNT_P(variable_ptr) > 1) &&
  EXPECTED(!PZVAL_IS_REF(variable_ptr))) {
  /* we need to split */
Z_DELREF_P(variable_ptr);
GC_ZVAL_CHECK_POSSIBLE_ROOT(variable_ptr);
ALLOC_ZVAL(variable_ptr);
INIT_PZVAL_COPY(variable_ptr, value);
*variable_ptr_ptr = variable_ptr;
return variable_ptr;
} else {
if (EXPECTED(Z_TYPE_P(variable_ptr) <= IS_BOOL)) {
/* nothing to destroy */
ZVAL_COPY_VALUE(variable_ptr, value);
} else {
ZVAL_COPY_VALUE(&garbage, variable_ptr);
ZVAL_COPY_VALUE(variable_ptr, value);
_zval_dtor_func(&garbage ZEND_FILE_LINE_CC);
}
return variable_ptr;
}
}

static inline zval* zend_assign_const_to_variable(zval **variable_ptr_ptr, zval *value TSRMLS_DC)
{
zval *variable_ptr = *variable_ptr_ptr;
zval garbage;

if (Z_TYPE_P(variable_ptr) == IS_OBJECT &&
UNEXPECTED(Z_OBJ_HANDLER_P(variable_ptr, set) != NULL)) {
Z_OBJ_HANDLER_P(variable_ptr, set)(variable_ptr_ptr, value TSRMLS_CC);
return variable_ptr;
}

  if (UNEXPECTED(Z_REFCOUNT_P(variable_ptr) > 1) &&
  EXPECTED(!PZVAL_IS_REF(variable_ptr))) {
/* we need to split */
Z_DELREF_P(variable_ptr);
GC_ZVAL_CHECK_POSSIBLE_ROOT(variable_ptr);
ALLOC_ZVAL(variable_ptr);
INIT_PZVAL_COPY(variable_ptr, value);
zval_copy_ctor(variable_ptr);
*variable_ptr_ptr = variable_ptr;
return variable_ptr;
  } else {
if (EXPECTED(Z_TYPE_P(variable_ptr) <= IS_BOOL)) {
/* nothing to destroy */
ZVAL_COPY_VALUE(variable_ptr, value);
zendi_zval_copy_ctor(*variable_ptr);
} else {
ZVAL_COPY_VALUE(&garbage, variable_ptr);
ZVAL_COPY_VALUE(variable_ptr, value);
zendi_zval_copy_ctor(*variable_ptr);
_zval_dtor_func(&garbage ZEND_FILE_LINE_CC);
}
return variable_ptr;
}
}

static inline zval* zend_assign_to_variable(zval **variable_ptr_ptr, zval *value TSRMLS_DC)
{
zval *variable_ptr = *variable_ptr_ptr;
zval garbage;

if (Z_TYPE_P(variable_ptr) == IS_OBJECT &&
UNEXPECTED(Z_OBJ_HANDLER_P(variable_ptr, set) != NULL)) {
Z_OBJ_HANDLER_P(variable_ptr, set)(variable_ptr_ptr, value TSRMLS_CC);
return variable_ptr;
}

  if (EXPECTED(!PZVAL_IS_REF(variable_ptr))) {
if (Z_REFCOUNT_P(variable_ptr)==1) {
if (UNEXPECTED(variable_ptr == value)) {
return variable_ptr;
} else if (EXPECTED(!PZVAL_IS_REF(value))) {
Z_ADDREF_P(value);
*variable_ptr_ptr = value;
ZEND_ASSERT(variable_ptr != &EG(uninitialized_zval));
GC_REMOVE_ZVAL_FROM_BUFFER(variable_ptr);
zval_dtor(variable_ptr);
efree(variable_ptr);
return value;
} else {
goto copy_value;
}
} else { /* we need to split */
Z_DELREF_P(variable_ptr);
GC_ZVAL_CHECK_POSSIBLE_ROOT(variable_ptr);
if (PZVAL_IS_REF(value)) {
ALLOC_ZVAL(variable_ptr);
*variable_ptr_ptr = variable_ptr;
INIT_PZVAL_COPY(variable_ptr, value);
zval_copy_ctor(variable_ptr);
return variable_ptr;
} else {
*variable_ptr_ptr = value;
Z_ADDREF_P(value);
return value;
}
}
  } else {
if (EXPECTED(variable_ptr != value)) {
copy_value:
if (EXPECTED(Z_TYPE_P(variable_ptr) <= IS_BOOL)) {
/* nothing to destroy */
ZVAL_COPY_VALUE(variable_ptr, value);
zendi_zval_copy_ctor(*variable_ptr);
} else {
ZVAL_COPY_VALUE(&garbage, variable_ptr);
ZVAL_COPY_VALUE(variable_ptr, value);
zendi_zval_copy_ctor(*variable_ptr);
_zval_dtor_func(&garbage ZEND_FILE_LINE_CC);
}
}
return variable_ptr;
}
}

/* Utility Functions for Extensions */
static void zend_extension_statement_handler(const zend_extension *extension, zend_op_array *op_array TSRMLS_DC)
{
if (extension->statement_handler) {
extension->statement_handler(op_array);
}
}


static void zend_extension_fcall_begin_handler(const zend_extension *extension, zend_op_array *op_array TSRMLS_DC)
{
if (extension->fcall_begin_handler) {
extension->fcall_begin_handler(op_array);
}
}


static void zend_extension_fcall_end_handler(const zend_extension *extension, zend_op_array *op_array TSRMLS_DC)
{
if (extension->fcall_end_handler) {
extension->fcall_end_handler(op_array);
}
}


static inline HashTable *zend_get_target_symbol_table(int fetch_type TSRMLS_DC)
{
switch (fetch_type) {
case ZEND_FETCH_LOCAL:
if (!EG(active_symbol_table)) {
zend_rebuild_symbol_table(TSRMLS_C);
}
return EG(active_symbol_table);
break;
case ZEND_FETCH_GLOBAL:
case ZEND_FETCH_GLOBAL_LOCK:
return &EG(symbol_table);
break;
case ZEND_FETCH_STATIC:
if (!EG(active_op_array)->static_variables) {
ALLOC_HASHTABLE(EG(active_op_array)->static_variables);
zend_hash_init(EG(active_op_array)->static_variables, 2, NULL, ZVAL_PTR_DTOR, 0);
}
return EG(active_op_array)->static_variables;
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
return NULL;
}

static inline zval **zend_fetch_dimension_address_inner(HashTable *ht, const zval *dim, int dim_type, int type TSRMLS_DC)
{
zval **retval;
char *offset_key;
int offset_key_length;
ulong hval;

switch (dim->type) {
case IS_NULL:
offset_key = "";
offset_key_length = 0;
hval = zend_inline_hash_func("", 1);
goto fetch_string_dim;

case IS_STRING:

offset_key = dim->value.str.val;
offset_key_length = dim->value.str.len;

if (dim_type == IS_CONST) {
hval = Z_HASH_P(dim);
} else {
ZEND_HANDLE_NUMERIC_EX(offset_key, offset_key_length+1, hval, goto num_index);
hval = str_hash(offset_key, offset_key_length);
}
fetch_string_dim:
if (zend_hash_quick_find(ht, offset_key, offset_key_length+1, hval, (void **) &retval) == FAILURE) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE, "Undefined index: %s", offset_key);
/* break missing intentionally */
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval_ptr);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined index: %s", offset_key);
/* break missing intentionally */
case BP_VAR_W: {
zval *new_zval = &EG(uninitialized_zval);

Z_ADDREF_P(new_zval);
zend_hash_quick_update(ht, offset_key, offset_key_length+1, hval, &new_zval, sizeof(zval *), (void **) &retval);
}
break;
}
}
break;
case IS_DOUBLE:
hval = zend_dval_to_lval(Z_DVAL_P(dim));
goto num_index;
case IS_RESOURCE:
zend_error(E_STRICT, "Resource ID#%ld used as offset, casting to integer (%ld)", Z_LVAL_P(dim), Z_LVAL_P(dim));
/* Fall Through */
case IS_BOOL:
case IS_LONG:
hval = Z_LVAL_P(dim);
num_index:
if (zend_hash_index_find(ht, hval, (void **) &retval) == FAILURE) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE,"Undefined offset: %ld", hval);
/* break missing intentionally */
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval_ptr);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined offset: %ld", hval);
/* break missing intentionally */
case BP_VAR_W: {
zval *new_zval = &EG(uninitialized_zval);

Z_ADDREF_P(new_zval);
zend_hash_index_update(ht, hval, &new_zval, sizeof(zval *), (void **) &retval);
}
break;
}
}
break;

default:
zend_error(E_WARNING, "Illegal offset type");
return (type == BP_VAR_W || type == BP_VAR_RW) ?
&EG(error_zval_ptr) : &EG(uninitialized_zval_ptr);
}
return retval;
}

static void zend_fetch_dimension_address(temp_variable *result, zval **container_ptr, zval *dim, int dim_type, int type TSRMLS_DC)
{
zval *container = *container_ptr;
zval **retval;

switch (Z_TYPE_P(container)) {

case IS_ARRAY:
if (type != BP_VAR_UNSET && Z_REFCOUNT_P(container)>1 && !PZVAL_IS_REF(container)) {
SEPARATE_ZVAL(container_ptr);
container = *container_ptr;
}
fetch_from_array:
if (dim == NULL) {
zval *new_zval = &EG(uninitialized_zval);

Z_ADDREF_P(new_zval);
if (zend_hash_next_index_insert(Z_ARRVAL_P(container), &new_zval, sizeof(zval *), (void **) &retval) == FAILURE) {
zend_error(E_WARNING, "Cannot add element to the array as the next element is already occupied");
retval = &EG(error_zval_ptr);
Z_DELREF_P(new_zval);
}
} else {
retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type TSRMLS_CC);
}
result->var.ptr_ptr = retval;
PZVAL_LOCK(*retval);
return;
break;

case IS_NULL:
if (container == &EG(error_zval)) {
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(EG(error_zval_ptr));
} else if (type != BP_VAR_UNSET) {
convert_to_array:
if (!PZVAL_IS_REF(container)) {
SEPARATE_ZVAL(container_ptr);
container = *container_ptr;
}
zval_dtor(container);
array_init(container);
goto fetch_from_array;
} else {
/* for read-mode only */
result->var.ptr_ptr = &EG(uninitialized_zval_ptr);
PZVAL_LOCK(EG(uninitialized_zval_ptr));
}
return;
break;

case IS_STRING: {
zval tmp;

if (type != BP_VAR_UNSET && Z_STRLEN_P(container)==0) {
goto convert_to_array;
}
if (dim == NULL) {
zend_error_noreturn(E_ERROR, "[] operator not supported for strings");
}

if (type != BP_VAR_UNSET) {
SEPARATE_ZVAL_IF_NOT_REF(container_ptr);
}

if (Z_TYPE_P(dim) != IS_LONG) {

switch(Z_TYPE_P(dim)) {
/* case IS_LONG: */
case IS_STRING:
if (IS_LONG == is_numeric_string(Z_STRVAL_P(dim), Z_STRLEN_P(dim), NULL, NULL, -1)) {
break;
}
if (type != BP_VAR_UNSET) {
zend_error(E_WARNING, "Illegal string offset '%s'", dim->value.str.val);
}

break;
case IS_DOUBLE:
case IS_NULL:
case IS_BOOL:
zend_error(E_NOTICE, "String offset cast occurred");
break;
default:
zend_error(E_WARNING, "Illegal offset type");
break;
}

tmp = *dim;
zval_copy_ctor(&tmp);
convert_to_long(&tmp);
dim = &tmp;
}
container = *container_ptr;
result->str_offset.str = container;
PZVAL_LOCK(container);
result->str_offset.offset = Z_LVAL_P(dim);
result->str_offset.ptr_ptr = NULL;
return;
}
break;

case IS_OBJECT:
if (!Z_OBJ_HT_P(container)->read_dimension) {
zend_error_noreturn(E_ERROR, "Cannot use object as array");
} else {
zval *overloaded_result;

if (dim_type == IS_TMP_VAR) {
zval *orig = dim;
MAKE_REAL_ZVAL_PTR(dim);
ZVAL_NULL(orig);
}
overloaded_result = Z_OBJ_HT_P(container)->read_dimension(container, dim, type TSRMLS_CC);

if (overloaded_result) {
if (!Z_ISREF_P(overloaded_result)) {
if (Z_REFCOUNT_P(overloaded_result) > 0) {
zval *tmp = overloaded_result;

ALLOC_ZVAL(overloaded_result);
ZVAL_COPY_VALUE(overloaded_result, tmp);
zval_copy_ctor(overloaded_result);
Z_UNSET_ISREF_P(overloaded_result);
Z_SET_REFCOUNT_P(overloaded_result, 0);
}
if (Z_TYPE_P(overloaded_result) != IS_OBJECT) {
zend_class_entry *ce = Z_OBJCE_P(container);
zend_error(E_NOTICE, "Indirect modification of overloaded element of %s has no effect", ce->name);
}
}
AI_SET_PTR(result, overloaded_result);
PZVAL_LOCK(overloaded_result);
} else {
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(EG(error_zval_ptr));
}
if (dim_type == IS_TMP_VAR) {
zval_ptr_dtor(&dim);
}
}
return;
break;

case IS_BOOL:
if (type != BP_VAR_UNSET && Z_LVAL_P(container)==0) {
goto convert_to_array;
}
/* break missing intentionally */

default:
if (type == BP_VAR_UNSET) {
zend_error(E_WARNING, "Cannot unset offset in a non-array variable");
result->var.ptr_ptr = &EG(uninitialized_zval_ptr);
PZVAL_LOCK(EG(uninitialized_zval_ptr));
} else {
zend_error(E_WARNING, "Cannot use a scalar value as an array");
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(EG(error_zval_ptr));
}
break;
}
}

static void zend_fetch_dimension_address_read(temp_variable *result, zval *container, zval *dim, int dim_type, int type TSRMLS_DC)
{
zval **retval;

switch (Z_TYPE_P(container)) {

case IS_ARRAY:
retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type TSRMLS_CC);
result->var.ptr = *retval;
PZVAL_LOCK(*retval);
return;

case IS_NULL:
result->var.ptr = &EG(uninitialized_zval);
PZVAL_LOCK(&EG(uninitialized_zval));
return;

case IS_STRING: {
zval tmp;
zval *ptr;

if (Z_TYPE_P(dim) != IS_LONG) {
switch(Z_TYPE_P(dim)) {
/* case IS_LONG: */
case IS_STRING:
if (IS_LONG == is_numeric_string(Z_STRVAL_P(dim), Z_STRLEN_P(dim), NULL, NULL, -1)) {
break;
}
if (type != BP_VAR_IS) {
zend_error(E_WARNING, "Illegal string offset '%s'", dim->value.str.val);
}
break;
case IS_DOUBLE:
case IS_NULL:
case IS_BOOL:
if (type != BP_VAR_IS) {
zend_error(E_NOTICE, "String offset cast occurred");
}
break;
default:
zend_error(E_WARNING, "Illegal offset type");
break;
}

ZVAL_COPY_VALUE(&tmp, dim);
zval_copy_ctor(&tmp);
convert_to_long(&tmp);
dim = &tmp;
}

ALLOC_ZVAL(ptr);
INIT_PZVAL(ptr);
Z_TYPE_P(ptr) = IS_STRING;

if (Z_LVAL_P(dim) < 0 || Z_STRLEN_P(container) <= Z_LVAL_P(dim)) {
if (type != BP_VAR_IS) {
zend_error(E_NOTICE, "Uninitialized string offset: %ld", Z_LVAL_P(dim));
}
Z_STRVAL_P(ptr) = STR_EMPTY_ALLOC();
Z_STRLEN_P(ptr) = 0;
} else {
Z_STRVAL_P(ptr) = (char*)emalloc(2);
Z_STRVAL_P(ptr)[0] = Z_STRVAL_P(container)[Z_LVAL_P(dim)];
Z_STRVAL_P(ptr)[1] = 0;
Z_STRLEN_P(ptr) = 1;
}
result->var.ptr = ptr;
return;
}
break;

case IS_OBJECT:
if (!Z_OBJ_HT_P(container)->read_dimension) {
zend_error_noreturn(E_ERROR, "Cannot use object as array");
} else {
zval *overloaded_result;

if (dim_type == IS_TMP_VAR) {
zval *orig = dim;
MAKE_REAL_ZVAL_PTR(dim);
ZVAL_NULL(orig);
}
overloaded_result = Z_OBJ_HT_P(container)->read_dimension(container, dim, type TSRMLS_CC);

if (result) {
if (overloaded_result) {
result->var.ptr = overloaded_result;
PZVAL_LOCK(overloaded_result);
} else {
result->var.ptr = &EG(uninitialized_zval);
PZVAL_LOCK(&EG(uninitialized_zval));
}
}
if (dim_type == IS_TMP_VAR) {
zval_ptr_dtor(&dim);
}
}
return;

default:
result->var.ptr = &EG(uninitialized_zval);
PZVAL_LOCK(&EG(uninitialized_zval));
return;
}
}

ZEND_API void zend_fetch_dimension_by_zval(zval **result, zval *container, zval *dim TSRMLS_DC) {
temp_variable tmp;
zend_fetch_dimension_address_read(&tmp, container, dim, IS_TMP_VAR, BP_VAR_R TSRMLS_CC);
*result = tmp.var.ptr;
}

static void zend_fetch_property_address(temp_variable *result, zval **container_ptr, zval *prop_ptr, const zend_literal *key, int type TSRMLS_DC)
{
zval *container = *container_ptr;

if (Z_TYPE_P(container) != IS_OBJECT) {
if (container == &EG(error_zval)) {
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(EG(error_zval_ptr));
return;
}

/* this should modify object only if it's empty */
if (type != BP_VAR_UNSET &&
((Z_TYPE_P(container) == IS_NULL ||
(Z_TYPE_P(container) == IS_BOOL && Z_LVAL_P(container)==0) ||
(Z_TYPE_P(container) == IS_STRING && Z_STRLEN_P(container)==0)))) {
if (!PZVAL_IS_REF(container)) {
SEPARATE_ZVAL(container_ptr);
container = *container_ptr;
}
object_init(container);
} else {
zend_error(E_WARNING, "Attempt to modify property of non-object");
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(EG(error_zval_ptr));
return;
}
}

if (Z_OBJ_HT_P(container)->get_property_ptr_ptr) {
zval **ptr_ptr = Z_OBJ_HT_P(container)->get_property_ptr_ptr(container, prop_ptr, type, key TSRMLS_CC);
if (NULL == ptr_ptr) {
zval *ptr;

if (Z_OBJ_HT_P(container)->read_property &&
(ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, type, key TSRMLS_CC)) != NULL) {
AI_SET_PTR(result, ptr);
PZVAL_LOCK(ptr);
} else {
zend_error_noreturn(E_ERROR, "Cannot access undefined property for object with overloaded property access");
}
} else {
result->var.ptr_ptr = ptr_ptr;
PZVAL_LOCK(*ptr_ptr);
}
} else if (Z_OBJ_HT_P(container)->read_property) {
zval *ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, type, key TSRMLS_CC);

AI_SET_PTR(result, ptr);
PZVAL_LOCK(ptr);
} else {
zend_error(E_WARNING, "This object doesn't support property references");
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(EG(error_zval_ptr));
}
}

static inline zend_brk_cont_element* zend_brk_cont(int nest_levels, int array_offset, const zend_op_array *op_array, const zend_execute_data *execute_data TSRMLS_DC)
{
int original_nest_levels = nest_levels;
zend_brk_cont_element *jmp_to;

do {
if (array_offset==-1) {
zend_error_noreturn(E_ERROR, "Cannot break/continue %d level%s", original_nest_levels, (original_nest_levels == 1) ? "" : "s");
}
jmp_to = &op_array->brk_cont_array[array_offset];
if (nest_levels>1) {
zend_op *brk_opline = &op_array->opcodes[jmp_to->brk];

switch (brk_opline->opcode) {
case ZEND_SWITCH_FREE:
if (!(brk_opline->extended_value & EXT_TYPE_FREE_ON_RETURN)) {
zval_ptr_dtor(&EX_T(brk_opline->op1.var).var.ptr);
}
break;
case ZEND_FREE:
if (!(brk_opline->extended_value & EXT_TYPE_FREE_ON_RETURN)) {
zendi_zval_dtor(EX_T(brk_opline->op1.var).tmp_var);
}
break;
}
}
array_offset = jmp_to->parent;
} while (--nest_levels > 0);
return jmp_to;
}

#if ZEND_INTENSIVE_DEBUGGING

#define CHECK_SYMBOL_TABLES() \
zend_hash_apply(&EG(symbol_table), (apply_func_t) zend_check_symbol TSRMLS_CC); \
if (&EG(symbol_table)!=EG(active_symbol_table)) { \
zend_hash_apply(EG(active_symbol_table), (apply_func_t) zend_check_symbol TSRMLS_CC); \
}

static int zend_check_symbol(zval **pz TSRMLS_DC)
{
if (Z_TYPE_PP(pz) > 9) {
fprintf(stderr, "Warning! %x has invalid type!\n", *pz);
/* See http://support.microsoft.com/kb/190351 */
#ifdef PHP_WIN32
fflush(stderr);
#endif
} else if (Z_TYPE_PP(pz) == IS_ARRAY) {
zend_hash_apply(Z_ARRVAL_PP(pz), (apply_func_t) zend_check_symbol TSRMLS_CC);
} else if (Z_TYPE_PP(pz) == IS_OBJECT) {

/* OBJ-TBI - doesn't support new object model! */
zend_hash_apply(Z_OBJPROP_PP(pz), (apply_func_t) zend_check_symbol TSRMLS_CC);
}

return 0;
}


#else
#define CHECK_SYMBOL_TABLES()
#endif

ZEND_API opcode_handler_t *zend_opcode_handlers;

ZEND_API void execute_internal(zend_execute_data *execute_data_ptr, zend_fcall_info *fci, int return_value_used TSRMLS_DC)
{
if (fci != NULL) {
execute_data_ptr->function_state.function->internal_function.handler(
fci->param_count, *fci->retval_ptr_ptr, fci->retval_ptr_ptr,
fci->object_ptr, 1 TSRMLS_CC
);
} else {
zval **return_value_ptr = &EX_TMP_VAR(execute_data_ptr, execute_data_ptr->opline->result.var)->var.ptr;
execute_data_ptr->function_state.function->internal_function.handler(
execute_data_ptr->opline->extended_value, *return_value_ptr, return_value_ptr,
execute_data_ptr->object, return_value_used TSRMLS_CC
);
}
}

void zend_clean_and_cache_symbol_table(HashTable *symbol_table TSRMLS_DC) /* {{{ */
{
if (EG(symtable_cache_ptr) >= EG(symtable_cache_limit)) {
zend_hash_destroy(symbol_table);
FREE_HASHTABLE(symbol_table);
} else {
/* clean before putting into the cache, since clean
could call dtors, which could use cached hash */
zend_hash_clean(symbol_table);
*(++EG(symtable_cache_ptr)) = symbol_table;
}
}
/* }}} */

static zend_always_inline void i_free_compiled_variables(zend_execute_data *execute_data TSRMLS_DC) /* {{{ */
{
zval ***cv = EX_CV_NUM(execute_data, 0);
zval ***end = cv + EX(op_array)->last_var;
while (cv != end) {
if (*cv) {
zval_ptr_dtor(*cv);
}
cv++;
  }
}
/* }}} */

void zend_free_compiled_variables(zend_execute_data *execute_data TSRMLS_DC) /* {{{ */
{
i_free_compiled_variables(execute_data TSRMLS_CC);
}
/* }}} */

/*
* Stack Frame Layout (the whole stack frame is allocated at once)
* ==================
*
* +========================================+
* | zend_execute_data |<---+
* | EX(function_state).arguments |--+ |
* | ... | | |
* | ARGUMENT [1] | | |
* | ... | | |
* | ARGUMENT [ARGS_NUMBER] | | |
* | ARGS_NUMBER |<-+ |
* +========================================+ |
* |
* +========================================+ |
* | TMP_VAR[op_arrat->T-1] | |
* | ... | |
* EX_TMP_VAR_NUM(0) ----> | TMP_VAR[0] | |
* +----------------------------------------+ |
* EG(current_execute_data) -> | zend_execute_data | |
* | EX(prev_execute_data) |----+
* +----------------------------------------+
* EX_CV_NUM(0) ---------> | CV[0] |--+
* | ... | |
* | CV[op_array->last_var-1] | |
* +----------------------------------------+ |
* | Optional slot for CV[0] zval* |<-+
* | ... |
* | ...for CV [op_array->last_var-1] zval* |
* +----------------------------------------+
* EX(call_slots) -> | CALL_SLOT[0] |
* | ... |
* | CALL_SLOT[op_array->nested_calls-1] |
* +----------------------------------------+
* zend_vm_stack_frame_base -> | ARGUMENTS STACK [0] |
* | ... |
* zend_vm_stack_top --------> | ... |
* | ... |
* | ARGUMENTS STACK [op_array->used_stack] |
* +----------------------------------------+
*/

static zend_always_inline zend_execute_data *i_create_execute_data_from_op_array(zend_op_array *op_array, zend_bool nested TSRMLS_DC) /* {{{ */
{
zend_execute_data *execute_data;

/*
* When allocating the execute_data, memory for compiled variables and
* temporary variables is also allocated before and after the actual
* zend_execute_data struct. In addition we also allocate space to store
* information about syntactically nested called functions and actual
* parameters. op_array->last_var specifies the number of compiled
* variables and op_array->T is the number of temporary variables. If there
* is no symbol table, then twice as much memory is allocated for compiled
* variables. In that case the first half contains zval**s and the second
* half the actual zval*s (which would otherwise be in the symbol table).
*/
size_t execute_data_size = ZEND_MM_ALIGNED_SIZE(sizeof(zend_execute_data));
size_t CVs_size = ZEND_MM_ALIGNED_SIZE(sizeof(zval **) * op_array->last_var * (EG(active_symbol_table) ? 1 : 2));
size_t Ts_size = ZEND_MM_ALIGNED_SIZE(sizeof(temp_variable)) * op_array->T;
size_t call_slots_size = ZEND_MM_ALIGNED_SIZE(sizeof(call_slot)) * op_array->nested_calls;
size_t stack_size = ZEND_MM_ALIGNED_SIZE(sizeof(zval*)) * op_array->used_stack;
size_t total_size = execute_data_size + Ts_size + CVs_size + call_slots_size + stack_size;

/*
* Normally the execute_data is allocated on the VM stack (because it does
* not actually do any allocation and thus is faster). For generators
* though this behavior would be suboptimal, because the (rather large)
* structure would have to be copied back and forth every time execution is
* suspended or resumed. That's why for generators the execution context
* is allocated using a separate VM stack, thus allowing to save and
* restore it simply by replacing a pointer. The same segment also keeps
* a copy of previous execute_data and passed parameters.
*/
if (UNEXPECTED((op_array->fn_flags & ZEND_ACC_GENERATOR) != 0)) {
/* Prepend the regular stack frame with a copy of prev_execute_data
* and the passed arguments
*/
int args_count = zend_vm_stack_get_args_count_ex(EG(current_execute_data));
size_t args_size = ZEND_MM_ALIGNED_SIZE(sizeof(zval*)) * (args_count + 1);

total_size += args_size + execute_data_size;

EG(argument_stack) = zend_vm_stack_new_page((total_size + (sizeof(void*) - 1)) / sizeof(void*));
EG(argument_stack)->prev = NULL;
execute_data = (zend_execute_data*)((char*)ZEND_VM_STACK_ELEMETS(EG(argument_stack)) + args_size + execute_data_size + Ts_size);

/* copy prev_execute_data */
EX(prev_execute_data) = (zend_execute_data*)((char*)ZEND_VM_STACK_ELEMETS(EG(argument_stack)) + args_size);
memset(EX(prev_execute_data), 0, sizeof(zend_execute_data));
EX(prev_execute_data)->function_state.function = (zend_function*)op_array;
EX(prev_execute_data)->function_state.arguments = (void**)((char*)ZEND_VM_STACK_ELEMETS(EG(argument_stack)) + ZEND_MM_ALIGNED_SIZE(sizeof(zval*)) * args_count);

/* copy arguments */
*EX(prev_execute_data)->function_state.arguments = (void*)(zend_uintptr_t)args_count;
if (args_count > 0) {
zval **arg_src = (zval**)zend_vm_stack_get_arg_ex(EG(current_execute_data), 1);
zval **arg_dst = (zval**)zend_vm_stack_get_arg_ex(EX(prev_execute_data), 1);
int i;

for (i = 0; i < args_count; i++) {
arg_dst[i] = arg_src[i];
Z_ADDREF_P(arg_dst[i]);
}
}
} else {
execute_data = zend_vm_stack_alloc(total_size TSRMLS_CC);
execute_data = (zend_execute_data*)((char*)execute_data + Ts_size);
EX(prev_execute_data) = EG(current_execute_data);
}

memset(EX_CV_NUM(execute_data, 0), 0, sizeof(zval **) * op_array->last_var);

EX(call_slots) = (call_slot*)((char *)execute_data + execute_data_size + CVs_size);


EX(op_array) = op_array;

EG(argument_stack)->top = zend_vm_stack_frame_base(execute_data);

EX(object) = NULL;
EX(current_this) = NULL;
EX(old_error_reporting) = NULL;
EX(symbol_table) = EG(active_symbol_table);
EX(call) = NULL;
EG(current_execute_data) = execute_data;
EX(nested) = nested;
EX(delayed_exception) = NULL;

if (!op_array->run_time_cache && op_array->last_cache_slot) {
op_array->run_time_cache = ecalloc(op_array->last_cache_slot, sizeof(void*));
}

if (op_array->this_var != -1 && EG(This)) {
  Z_ADDREF_P(EG(This)); /* For $this pointer */
if (!EG(active_symbol_table)) {
EX_CV(op_array->this_var) = (zval **) EX_CV_NUM(execute_data, op_array->last_var + op_array->this_var);
*EX_CV(op_array->this_var) = EG(This);
} else {
if (zend_hash_add(EG(active_symbol_table), "this", sizeof("this"), &EG(This), sizeof(zval *), (void **) EX_CV_NUM(execute_data, op_array->this_var))==FAILURE) {
Z_DELREF_P(EG(This));
}
}
}

EX(opline) = UNEXPECTED((op_array->fn_flags & ZEND_ACC_INTERACTIVE) != 0) && EG(start_op) ? EG(start_op) : op_array->opcodes;
EG(opline_ptr) = &EX(opline);

EX(function_state).function = (zend_function *) op_array;
EX(function_state).arguments = NULL;

return execute_data;
}
/* }}} */

ZEND_API zend_execute_data *zend_create_execute_data_from_op_array(zend_op_array *op_array, zend_bool nested TSRMLS_DC) /* {{{ */
{
return i_create_execute_data_from_op_array(op_array, nested TSRMLS_CC);
}
/* }}} */

static zend_always_inline zend_bool zend_is_by_ref_func_arg_fetch(zend_op *opline, call_slot *call TSRMLS_DC) /* {{{ */
{
zend_uint arg_num = opline->extended_value & ZEND_FETCH_ARG_MASK;
return ARG_SHOULD_BE_SENT_BY_REF(call->fbc, arg_num);
}
/* }}} */

static void **zend_vm_stack_push_args_with_copy(int count TSRMLS_DC) /* {{{ */
{
zend_vm_stack p = EG(argument_stack);

zend_vm_stack_extend(count + 1 TSRMLS_CC);

EG(argument_stack)->top += count;
*(EG(argument_stack)->top) = (void*)(zend_uintptr_t)count;
while (count-- > 0) {
void *data = *(--p->top);

if (UNEXPECTED(p->top == ZEND_VM_STACK_ELEMETS(p))) {
zend_vm_stack r = p;

EG(argument_stack)->prev = p->prev;
p = p->prev;
efree(r);
}
*(ZEND_VM_STACK_ELEMETS(EG(argument_stack)) + count) = data;
}
return EG(argument_stack)->top++;
}
/* }}} */

static zend_always_inline void** zend_vm_stack_push_args(int count TSRMLS_DC) /* {{{ */
{
if (UNEXPECTED(EG(argument_stack)->top - ZEND_VM_STACK_ELEMETS(EG(argument_stack)) < count)
|| UNEXPECTED(EG(argument_stack)->top == EG(argument_stack)->end)) {
return zend_vm_stack_push_args_with_copy(count TSRMLS_CC);
}
*(EG(argument_stack)->top) = (void*)(zend_uintptr_t)count;
return EG(argument_stack)->top++;
}
/* }}} */


#define ZEND_VM_NEXT_OPCODE() \
CHECK_SYMBOL_TABLES() \
ZEND_VM_INC_OPCODE(); \
ZEND_VM_CONTINUE()

#define ZEND_VM_SET_OPCODE(new_op) \
CHECK_SYMBOL_TABLES() \
OPLINE = new_op

#define ZEND_VM_JMP(new_op) \
if (EXPECTED(!EG(exception))) { \
ZEND_VM_SET_OPCODE(new_op); \
} else { \
LOAD_OPLINE(); \
} \
ZEND_VM_CONTINUE()

#define ZEND_VM_INC_OPCODE() \
OPLINE++

#ifdef __GNUC__
# define ZEND_VM_GUARD(name) __asm__("#" #name)
#else
# define ZEND_VM_GUARD(name)
#endif

#include "zend_vm_execute.h"

ZEND_API int zend_set_user_opcode_handler(zend_uchar opcode, user_opcode_handler_t handler)
{
if (opcode != ZEND_USER_OPCODE) {
if (handler == NULL) {
/* restore the original handler */
zend_user_opcodes[opcode] = opcode;
} else {
zend_user_opcodes[opcode] = ZEND_USER_OPCODE;
}
zend_user_opcode_handlers[opcode] = handler;
return SUCCESS;
}
return FAILURE;
}

ZEND_API user_opcode_handler_t zend_get_user_opcode_handler(zend_uchar opcode)
{
return zend_user_opcode_handlers[opcode];
}

ZEND_API zval *zend_get_zval_ptr(int op_type, const znode_op *node, const zend_execute_data *execute_data, zend_free_op *should_free, int type TSRMLS_DC) {
return get_zval_ptr(op_type, node, execute_data, should_free, type);
}

ZEND_API zval **zend_get_zval_ptr_ptr(int op_type, const znode_op *node, const zend_execute_data *execute_data, zend_free_op *should_free, int type TSRMLS_DC) {
return get_zval_ptr_ptr(op_type, node, execute_data, should_free, type);
}

/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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