php-src/Zend/zend_execute.c

/*
   +----------------------------------------------------------------------+
   | Zend Engine                                                          |
   +----------------------------------------------------------------------+
   | Copyright (c) 1998-2016 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>                                |
   |          Dmitry Stogov <dmitry@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"
#include "zend_inheritance.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 (ZEND_FASTCALL *incdec_t)(zval *);

#define get_zval_ptr(op_type, node, ex, should_free, type) _get_zval_ptr(op_type, node, ex, should_free, type)
#define get_zval_ptr_deref(op_type, node, ex, should_free, type) _get_zval_ptr_deref(op_type, node, ex, should_free, type)
#define get_zval_ptr_r(op_type, node, ex, should_free) _get_zval_ptr_r(op_type, node, ex, should_free)
#define get_zval_ptr_r_deref(op_type, node, ex, should_free) _get_zval_ptr_r_deref(op_type, node, ex, should_free)
#define get_zval_ptr_undef(op_type, node, ex, should_free, type) _get_zval_ptr_undef(op_type, node, ex, should_free, type)
#define get_zval_ptr_ptr(op_type, node, ex, should_free, type) _get_zval_ptr_ptr(op_type, node, ex, should_free, type)
#define get_zval_ptr_ptr_undef(op_type, node, ex, should_free, type) _get_zval_ptr_ptr(op_type, node, ex, should_free, type)
#define get_obj_zval_ptr(op_type, node, ex, should_free, type) _get_obj_zval_ptr(op_type, node, ex, should_free, type)
#define get_obj_zval_ptr_undef(op_type, node, ex, should_free, type) _get_obj_zval_ptr_undef(op_type, node, ex, should_free, type)
#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)

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

#define RETURN_VALUE_USED(opline) ((opline)->result_type != IS_UNUSED)

static ZEND_FUNCTION(pass)
{
}

static const zend_internal_function zend_pass_function = {
	ZEND_INTERNAL_FUNCTION, /* type              */
	{0, 0, 0},              /* arg_flags         */
	0,                      /* fn_flags          */
	NULL,                   /* name              */
	NULL,                   /* scope             */
	NULL,                   /* prototype         */
	0,                      /* num_args          */
	0,                      /* required_num_args */
	NULL,                   /* arg_info          */
	ZEND_FN(pass),          /* handler           */
	NULL                    /* module            */
};

#undef zval_ptr_dtor
#define zval_ptr_dtor(zv) i_zval_ptr_dtor(zv ZEND_FILE_LINE_CC)

#define READY_TO_DESTROY(zv) \
	(UNEXPECTED(zv) && Z_REFCOUNTED_P(zv) && Z_REFCOUNT_P(zv) == 1)

#define EXTRACT_ZVAL_PTR(zv) do {		\
	zval *__zv = (zv);								\
	if (EXPECTED(Z_TYPE_P(__zv) == IS_INDIRECT)) {	\
		ZVAL_COPY(__zv, Z_INDIRECT_P(__zv));	    \
	}												\
} while (0)

#define FREE_OP(should_free) \
	if (should_free) { \
		zval_ptr_dtor_nogc(should_free); \
	}

#define FREE_UNFETCHED_OP(type, var) \
	if ((type) & (IS_TMP_VAR|IS_VAR)) { \
		zval_ptr_dtor_nogc(EX_VAR(var)); \
	}

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

/* End of zend_execute_locks.h */

#define CV_DEF_OF(i) (EX(func)->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)))

#define ZEND_VM_MAIN_STACK_PAGE_SLOTS (16 * 1024) /* should be a power of 2 */
#define ZEND_VM_GENERATOR_STACK_PAGE_SLOTS (256)

#define ZEND_VM_STACK_PAGE_SLOTS(gen) ((gen) ? ZEND_VM_GENERATOR_STACK_PAGE_SLOTS : ZEND_VM_MAIN_STACK_PAGE_SLOTS)

#define ZEND_VM_STACK_PAGE_SIZE(gen)  (ZEND_VM_STACK_PAGE_SLOTS(gen) * sizeof(zval))

#define ZEND_VM_STACK_FREE_PAGE_SIZE(gen) \
	((ZEND_VM_STACK_PAGE_SLOTS(gen) - ZEND_VM_STACK_HEADER_SLOTS) * sizeof(zval))

#define ZEND_VM_STACK_PAGE_ALIGNED_SIZE(gen, size) \
	(((size) + (ZEND_VM_STACK_FREE_PAGE_SIZE(gen) - 1)) & ~(ZEND_VM_STACK_PAGE_SIZE(gen) - 1))

static zend_always_inline zend_vm_stack zend_vm_stack_new_page(size_t size, zend_vm_stack prev) {
	zend_vm_stack page = (zend_vm_stack)emalloc(size);

	page->top = ZEND_VM_STACK_ELEMENTS(page);
	page->end = (zval*)((char*)page + size);
	page->prev = prev;
	return page;
}

ZEND_API void zend_vm_stack_init(void)
{
	EG(vm_stack) = zend_vm_stack_new_page(ZEND_VM_STACK_PAGE_SIZE(0 /* main stack */), NULL);
	EG(vm_stack)->top++;
	EG(vm_stack_top) = EG(vm_stack)->top;
	EG(vm_stack_end) = EG(vm_stack)->end;
}

ZEND_API void zend_vm_stack_destroy(void)
{
	zend_vm_stack stack = EG(vm_stack);

	while (stack != NULL) {
		zend_vm_stack p = stack->prev;
		efree(stack);
		stack = p;
	}
}

ZEND_API void* zend_vm_stack_extend(size_t size)
{
	zend_vm_stack stack;
	void *ptr;

	stack = EG(vm_stack);
	stack->top = EG(vm_stack_top);
	EG(vm_stack) = stack = zend_vm_stack_new_page(
		EXPECTED(size < ZEND_VM_STACK_FREE_PAGE_SIZE(0)) ?
			ZEND_VM_STACK_PAGE_SIZE(0) : ZEND_VM_STACK_PAGE_ALIGNED_SIZE(0, size),
		stack);
	ptr = stack->top;
	EG(vm_stack_top) = (void*)(((char*)ptr) + size);
	EG(vm_stack_end) = stack->end;
	return ptr;
}

ZEND_API zval* zend_get_compiled_variable_value(const zend_execute_data *execute_data, uint32_t var)
{
	return EX_VAR(var);
}

static zend_always_inline zval *_get_zval_ptr_tmp(uint32_t var, const zend_execute_data *execute_data, zend_free_op *should_free)
{
	zval *ret = EX_VAR(var);
	*should_free = ret;

	ZEND_ASSERT(Z_TYPE_P(ret) != IS_REFERENCE);

	return ret;
}

static zend_always_inline zval *_get_zval_ptr_var(uint32_t var, const zend_execute_data *execute_data, zend_free_op *should_free)
{
	zval *ret = EX_VAR(var);

	*should_free = ret;
	return ret;
}

static zend_always_inline zval *_get_zval_ptr_var_deref(uint32_t var, const zend_execute_data *execute_data, zend_free_op *should_free)
{
	zval *ret = EX_VAR(var);

	*should_free = ret;
	ZVAL_DEREF(ret);
	return ret;
}

static zend_never_inline ZEND_COLD void zval_undefined_cv(uint32_t var, const zend_execute_data *execute_data)
{
	zend_string *cv = CV_DEF_OF(EX_VAR_TO_NUM(var));

	zend_error(E_NOTICE, "Undefined variable: %s", ZSTR_VAL(cv));
}

static zend_never_inline zval *_get_zval_cv_lookup(zval *ptr, uint32_t var, int type, const zend_execute_data *execute_data)
{
	switch (type) {
		case BP_VAR_R:
		case BP_VAR_UNSET:
			zval_undefined_cv(var, execute_data);
			/* break missing intentionally */
		case BP_VAR_IS:
			ptr = &EG(uninitialized_zval);
			break;
		case BP_VAR_RW:
			zval_undefined_cv(var, execute_data);
			/* break missing intentionally */
		case BP_VAR_W:
			ZVAL_NULL(ptr);
			break;
	}
	return ptr;
}

static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_R(zval *ptr, uint32_t var, const zend_execute_data *execute_data)
{
	zval_undefined_cv(var, execute_data);
	return &EG(uninitialized_zval);
}

static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_UNSET(zval *ptr, uint32_t var, const zend_execute_data *execute_data)
{
	zval_undefined_cv(var, execute_data);
	return &EG(uninitialized_zval);
}

static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_RW(zval *ptr, uint32_t var, const zend_execute_data *execute_data)
{
	ZVAL_NULL(ptr);
	zval_undefined_cv(var, execute_data);
	return ptr;
}

static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_W(zval *ptr, uint32_t var, const zend_execute_data *execute_data)
{
	ZVAL_NULL(ptr);
	return ptr;
}

static zend_always_inline zval *_get_zval_ptr_cv(const zend_execute_data *execute_data, uint32_t var, int type)
{
	zval *ret = EX_VAR(var);

	if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
		return _get_zval_cv_lookup(ret, var, type, execute_data);
	}
	return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_undef(const zend_execute_data *execute_data, uint32_t var)
{
	return EX_VAR(var);
}

static zend_always_inline zval *_get_zval_ptr_cv_deref(const zend_execute_data *execute_data, uint32_t var, int type)
{
	zval *ret = EX_VAR(var);

	if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
		return _get_zval_cv_lookup(ret, var, type, execute_data);
	}
	ZVAL_DEREF(ret);
	return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_R(const zend_execute_data *execute_data, uint32_t var)
{
	zval *ret = EX_VAR(var);

	if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
		return _get_zval_cv_lookup_BP_VAR_R(ret, var, execute_data);
	}
	return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_R(const zend_execute_data *execute_data, uint32_t var)
{
	zval *ret = EX_VAR(var);

	if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
		return _get_zval_cv_lookup_BP_VAR_R(ret, var, execute_data);
	}
	ZVAL_DEREF(ret);
	return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_UNSET(const zend_execute_data *execute_data, uint32_t var)
{
	zval *ret = EX_VAR(var);

	if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
		return _get_zval_cv_lookup_BP_VAR_UNSET(ret, var, execute_data);
	}
	return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_UNSET(const zend_execute_data *execute_data, uint32_t var)
{
	zval *ret = EX_VAR(var);

	if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
		return _get_zval_cv_lookup_BP_VAR_UNSET(ret, var, execute_data);
	}
	ZVAL_DEREF(ret);
	return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_IS(const zend_execute_data *execute_data, uint32_t var)
{
	zval *ret = EX_VAR(var);

	return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_IS(const zend_execute_data *execute_data, uint32_t var)
{
	zval *ret = EX_VAR(var);

	ZVAL_DEREF(ret);
	return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_RW(const zend_execute_data *execute_data, uint32_t var)
{
	zval *ret = EX_VAR(var);

	if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
		return _get_zval_cv_lookup_BP_VAR_RW(ret, var, execute_data);
	}
	return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_RW(const zend_execute_data *execute_data, uint32_t var)
{
	zval *ret = EX_VAR(var);

	if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
		return _get_zval_cv_lookup_BP_VAR_RW(ret, var, execute_data);
	}
	ZVAL_DEREF(ret);
	return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_W(const zend_execute_data *execute_data, uint32_t var)
{
	zval *ret = EX_VAR(var);

	if (Z_TYPE_P(ret) == IS_UNDEF) {
		return _get_zval_cv_lookup_BP_VAR_W(ret, var, execute_data);
	}
	return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_undef_BP_VAR_W(const zend_execute_data *execute_data, uint32_t var)
{
	return EX_VAR(var);
}

static zend_always_inline zval *_get_zval_ptr_cv_undef_BP_VAR_RW(const zend_execute_data *execute_data, uint32_t var)
{
	return EX_VAR(var);
}

static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_W(const zend_execute_data *execute_data, uint32_t var)
{
	zval *ret = EX_VAR(var);

	if (Z_TYPE_P(ret) == IS_UNDEF) {
		return _get_zval_cv_lookup_BP_VAR_W(ret, var, execute_data);
	}
	ZVAL_DEREF(ret);
	return ret;
}

static zend_always_inline zval *_get_zval_ptr(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
	if (op_type & (IS_TMP_VAR|IS_VAR)) {
		if (op_type == IS_TMP_VAR) {
			return _get_zval_ptr_tmp(node.var, execute_data, should_free);
		} else {
			ZEND_ASSERT(op_type == IS_VAR);
			return _get_zval_ptr_var(node.var, execute_data, should_free);
		}
	} else {
		*should_free = NULL;
		if (op_type == IS_CONST) {
			return EX_CONSTANT(node);
		} else if (op_type == IS_CV) {
			return _get_zval_ptr_cv(execute_data, node.var, type);
		} else {
			return NULL;
		}
	}
}

static zend_always_inline zval *_get_zval_ptr_r(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free)
{
	if (op_type & (IS_TMP_VAR|IS_VAR)) {
		if (op_type == IS_TMP_VAR) {
			return _get_zval_ptr_tmp(node.var, execute_data, should_free);
		} else {
			ZEND_ASSERT(op_type == IS_VAR);
			return _get_zval_ptr_var(node.var, execute_data, should_free);
		}
	} else {
		*should_free = NULL;
		if (op_type == IS_CONST) {
			return EX_CONSTANT(node);
		} else if (op_type == IS_CV) {
			return _get_zval_ptr_cv_BP_VAR_R(execute_data, node.var);
		} else {
			return NULL;
		}
	}
}

static zend_always_inline zval *_get_zval_ptr_deref(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
	if (op_type & (IS_TMP_VAR|IS_VAR)) {
		if (op_type == IS_TMP_VAR) {
			return _get_zval_ptr_tmp(node.var, execute_data, should_free);
		} else {
			ZEND_ASSERT(op_type == IS_VAR);
			return _get_zval_ptr_var_deref(node.var, execute_data, should_free);
		}
	} else {
		*should_free = NULL;
		if (op_type == IS_CONST) {
			return EX_CONSTANT(node);
		} else if (op_type == IS_CV) {
			return _get_zval_ptr_cv_deref(execute_data, node.var, type);
		} else {
			return NULL;
		}
	}
}

static zend_always_inline zval *_get_zval_ptr_r_deref(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free)
{
	if (op_type & (IS_TMP_VAR|IS_VAR)) {
		if (op_type == IS_TMP_VAR) {
			return _get_zval_ptr_tmp(node.var, execute_data, should_free);
		} else {
			ZEND_ASSERT(op_type == IS_VAR);
			return _get_zval_ptr_var_deref(node.var, execute_data, should_free);
		}
	} else {
		*should_free = NULL;
		if (op_type == IS_CONST) {
			return EX_CONSTANT(node);
		} else if (op_type == IS_CV) {
			return _get_zval_ptr_cv_deref_BP_VAR_R(execute_data, node.var);
		} else {
			return NULL;
		}
	}
}

static zend_always_inline zval *_get_zval_ptr_undef(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
	if (op_type & (IS_TMP_VAR|IS_VAR)) {
		if (op_type == IS_TMP_VAR) {
			return _get_zval_ptr_tmp(node.var, execute_data, should_free);
		} else {
			ZEND_ASSERT(op_type == IS_VAR);
			return _get_zval_ptr_var(node.var, execute_data, should_free);
		}
	} else {
		*should_free = NULL;
		if (op_type == IS_CONST) {
			return EX_CONSTANT(node);
		} else if (op_type == IS_CV) {
			return _get_zval_ptr_cv_undef(execute_data, node.var);
		} else {
			return NULL;
		}
	}
}

static zend_always_inline zval *_get_zval_ptr_ptr_var(uint32_t var, const zend_execute_data *execute_data, zend_free_op *should_free)
{
	zval *ret = EX_VAR(var);

	if (EXPECTED(Z_TYPE_P(ret) == IS_INDIRECT)) {
		*should_free = NULL;
		ret = Z_INDIRECT_P(ret);
	} else {
		*should_free = ret;
	}
	return ret;
}

static inline zval *_get_zval_ptr_ptr(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
	if (op_type == IS_CV) {
		*should_free = NULL;
		return _get_zval_ptr_cv(execute_data, node.var, type);
	} else /* if (op_type == IS_VAR) */ {
		ZEND_ASSERT(op_type == IS_VAR);
		return _get_zval_ptr_ptr_var(node.var, execute_data, should_free);
	}
}

static zend_always_inline zval *_get_obj_zval_ptr_unused(zend_execute_data *execute_data)
{	
	return &EX(This);
}

static inline zval *_get_obj_zval_ptr(int op_type, znode_op op, zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
	if (op_type == IS_UNUSED) {
		*should_free = NULL;
		return &EX(This);
	}
	return get_zval_ptr(op_type, op, execute_data, should_free, type);
}

static inline zval *_get_obj_zval_ptr_undef(int op_type, znode_op op, zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
	if (op_type == IS_UNUSED) {
		*should_free = NULL;
		return &EX(This);
	}
	return get_zval_ptr_undef(op_type, op, execute_data, should_free, type);
}

static inline zval *_get_obj_zval_ptr_ptr(int op_type, znode_op node, zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
	if (op_type == IS_UNUSED) {
		*should_free = NULL;
		return &EX(This);
	}
	return get_zval_ptr_ptr(op_type, node, execute_data, should_free, type);
}

static inline void zend_assign_to_variable_reference(zval *variable_ptr, zval *value_ptr)
{
	zend_reference *ref;

	if (EXPECTED(!Z_ISREF_P(value_ptr))) {
		ZVAL_NEW_REF(value_ptr, value_ptr);
	} else if (UNEXPECTED(variable_ptr == value_ptr)) {
		return;
	}

	ref = Z_REF_P(value_ptr);
	GC_REFCOUNT(ref)++;
	zval_ptr_dtor(variable_ptr);
	ZVAL_REF(variable_ptr, ref);
}

/* this should modify object only if it's empty */
static inline int make_real_object(zval *object)
{
	if (UNEXPECTED(Z_TYPE_P(object) != IS_OBJECT)) {
		if (EXPECTED(Z_TYPE_P(object) <= IS_FALSE)) {
			/* nothing to destroy */
		} else if (EXPECTED((Z_TYPE_P(object) == IS_STRING && Z_STRLEN_P(object) == 0))) {
			zval_ptr_dtor_nogc(object);
		} else {
			return 0;
		}
		object_init(object);
		zend_error(E_WARNING, "Creating default object from empty value");
	}
	return 1;
}

static char * zend_verify_internal_arg_class_kind(const zend_internal_arg_info *cur_arg_info, char **class_name, zend_class_entry **pce)
{
	zend_string *key;
	ALLOCA_FLAG(use_heap);

	ZSTR_ALLOCA_INIT(key, cur_arg_info->class_name, strlen(cur_arg_info->class_name), use_heap);
	*pce = zend_fetch_class(key, (ZEND_FETCH_CLASS_AUTO | ZEND_FETCH_CLASS_NO_AUTOLOAD));
	ZSTR_ALLOCA_FREE(key, use_heap);

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

static zend_always_inline zend_class_entry* zend_verify_arg_class_kind(const zend_arg_info *cur_arg_info)
{
	return zend_fetch_class(cur_arg_info->class_name, (ZEND_FETCH_CLASS_AUTO | ZEND_FETCH_CLASS_NO_AUTOLOAD));
}

static ZEND_COLD void zend_verify_arg_error(const zend_function *zf, uint32_t arg_num, const char *need_msg, const char *need_kind, const char *given_msg, const char *given_kind, zval *arg)
{
	zend_execute_data *ptr = EG(current_execute_data)->prev_execute_data;
	const char *fname = ZSTR_VAL(zf->common.function_name);
	const char *fsep;
	const char *fclass;

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

	if (zf->common.type == ZEND_USER_FUNCTION) {
		if (ptr && ptr->func && ZEND_USER_CODE(ptr->func->common.type)) {
			zend_type_error("Argument %d passed to %s%s%s() must %s%s, %s%s given, called in %s on line %d",
					arg_num, fclass, fsep, fname, need_msg, need_kind, given_msg, given_kind,
					ZSTR_VAL(ptr->func->op_array.filename), ptr->opline->lineno);
		} else {
			zend_type_error("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);
		}
	} else {
		zend_type_error("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);
	}
}

static int is_null_constant(zval *default_value)
{
	if (Z_CONSTANT_P(default_value)) {
		zval constant;

		ZVAL_COPY_VALUE(&constant, default_value);
		if (UNEXPECTED(zval_update_constant_ex(&constant, 0, NULL) != SUCCESS)) {
			return 0;
		}
		if (Z_TYPE(constant) == IS_NULL) {
			return 1;
		}
		zval_dtor(&constant);
	}
	return 0;
}

static zend_bool zend_verify_weak_scalar_type_hint(zend_uchar type_hint, zval *arg)
{
	switch (type_hint) {
		case _IS_BOOL: {
			zend_bool dest;

			if (!zend_parse_arg_bool_weak(arg, &dest)) {
				return 0;
			}
			zval_ptr_dtor(arg);
			ZVAL_BOOL(arg, dest);
			return 1;
		}
		case IS_LONG: {
			zend_long dest;

			if (!zend_parse_arg_long_weak(arg, &dest)) {
				return 0;
			}
			zval_ptr_dtor(arg);
			ZVAL_LONG(arg, dest);
			return 1;
		}
		case IS_DOUBLE: {
			double dest;

			if (!zend_parse_arg_double_weak(arg, &dest)) {
				return 0;
			}
			zval_ptr_dtor(arg);
			ZVAL_DOUBLE(arg, dest);
			return 1;
		}
		case IS_STRING: {
			zend_string *dest;

			/* on success "arg" is converted to IS_STRING */
			if (!zend_parse_arg_str_weak(arg, &dest)) {
				return 0;
			}
			return 1;
		}
		default:
			return 0;
	}
}

static zend_bool zend_verify_scalar_type_hint(zend_uchar type_hint, zval *arg, zend_bool strict)
{
	if (UNEXPECTED(strict)) {
		/* SSTH Exception: IS_LONG may be accepted as IS_DOUBLE (converted) */
		if (type_hint != IS_DOUBLE || Z_TYPE_P(arg) != IS_LONG) {
			return 0;
		}
	} else if (UNEXPECTED(Z_TYPE_P(arg) == IS_NULL)) {
		/* NULL may be accepted only by nullable hints (this is already checked) */
		return 0;
	}
	return zend_verify_weak_scalar_type_hint(type_hint, arg);
}

static int zend_verify_internal_arg_type(zend_function *zf, uint32_t arg_num, zval *arg)
{
	zend_internal_arg_info *cur_arg_info;
	char *need_msg, *class_name;
	zend_class_entry *ce;

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

	if (cur_arg_info->type_hint) {
		ZVAL_DEREF(arg);
		if (EXPECTED(cur_arg_info->type_hint == Z_TYPE_P(arg))) {
			if (cur_arg_info->class_name) {
				need_msg = zend_verify_internal_arg_class_kind((zend_internal_arg_info*)cur_arg_info, &class_name, &ce);
				if (!ce || !instanceof_function(Z_OBJCE_P(arg), ce)) {
					zend_verify_arg_error(zf, arg_num, need_msg, class_name, "instance of ", ZSTR_VAL(Z_OBJCE_P(arg)->name), arg);
					return 0;
				}
			}
		} else if (Z_TYPE_P(arg) != IS_NULL || !cur_arg_info->allow_null) {
			if (cur_arg_info->class_name) {
				need_msg = zend_verify_internal_arg_class_kind((zend_internal_arg_info*)cur_arg_info, &class_name, &ce);
				zend_verify_arg_error(zf, arg_num, need_msg, class_name, zend_zval_type_name(arg), "", arg);
				return 0;
			} else if (cur_arg_info->type_hint == IS_CALLABLE) {
				if (!zend_is_callable(arg, IS_CALLABLE_CHECK_SILENT, NULL)) {
					zend_verify_arg_error(zf, arg_num, "be callable", "", zend_zval_type_name(arg), "", arg);
					return 0;
				}
			} else if (cur_arg_info->type_hint == _IS_BOOL &&
			           EXPECTED(Z_TYPE_P(arg) == IS_FALSE || Z_TYPE_P(arg) == IS_TRUE)) {
				/* pass */
			} else if (UNEXPECTED(!zend_verify_scalar_type_hint(cur_arg_info->type_hint, arg, ZEND_CALL_USES_STRICT_TYPES(EG(current_execute_data))))) {
				zend_verify_arg_error(zf, arg_num, "be of the type ", zend_get_type_by_const(cur_arg_info->type_hint), zend_zval_type_name(arg), "", arg);
				return 0;
			}
		}
	}
	return 1;
}

static zend_always_inline int zend_verify_arg_type(zend_function *zf, uint32_t arg_num, zval *arg, zval *default_value, void **cache_slot)
{
	zend_arg_info *cur_arg_info;
	char *need_msg;
	zend_class_entry *ce;

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

	if (cur_arg_info->type_hint) {
		ZVAL_DEREF(arg);
		if (EXPECTED(cur_arg_info->type_hint == Z_TYPE_P(arg))) {
			if (cur_arg_info->class_name) {
				if (EXPECTED(*cache_slot)) {
					ce = (zend_class_entry*)*cache_slot;
				} else {
					ce = zend_verify_arg_class_kind(cur_arg_info);
					if (UNEXPECTED(!ce)) {
						zend_verify_arg_error(zf, arg_num, "be an instance of ", ZSTR_VAL(cur_arg_info->class_name), "instance of ", ZSTR_VAL(Z_OBJCE_P(arg)->name), arg);
						return 0;
					}
					*cache_slot = (void*)ce;
				}
				if (UNEXPECTED(!instanceof_function(Z_OBJCE_P(arg), ce))) {
					need_msg =
						(ce->ce_flags & ZEND_ACC_INTERFACE) ?
						"implement interface " : "be an instance of ";
					zend_verify_arg_error(zf, arg_num, need_msg, ZSTR_VAL(ce->name), "instance of ", ZSTR_VAL(Z_OBJCE_P(arg)->name), arg);
					return 0;
				}
			}
		} else if (Z_TYPE_P(arg) != IS_NULL || !(cur_arg_info->allow_null || (default_value && is_null_constant(default_value)))) {
			if (cur_arg_info->class_name) {
				if (EXPECTED(*cache_slot)) {
					ce = (zend_class_entry*)*cache_slot;
				} else {
					ce = zend_verify_arg_class_kind(cur_arg_info);
					if (UNEXPECTED(!ce)) {
						if (Z_TYPE_P(arg) == IS_OBJECT) {
							zend_verify_arg_error(zf, arg_num, "be an instance of ", ZSTR_VAL(cur_arg_info->class_name), "instance of ", ZSTR_VAL(Z_OBJCE_P(arg)->name), arg);
						} else {
							zend_verify_arg_error(zf, arg_num, "be an instance of ", ZSTR_VAL(cur_arg_info->class_name), "", zend_zval_type_name(arg), arg);
						}
						return 0;
					}
					*cache_slot = (void*)ce;
				}
				need_msg =
					(ce->ce_flags & ZEND_ACC_INTERFACE) ?
					"implement interface " : "be an instance of ";
				zend_verify_arg_error(zf, arg_num, need_msg, ZSTR_VAL(ce->name), zend_zval_type_name(arg), "", arg);
				return 0;
			} else if (cur_arg_info->type_hint == IS_CALLABLE) {
				if (!zend_is_callable(arg, IS_CALLABLE_CHECK_SILENT, NULL)) {
					zend_verify_arg_error(zf, arg_num, "be callable", "", zend_zval_type_name(arg), "", arg);
					return 0;
				}
			} else if (cur_arg_info->type_hint == _IS_BOOL &&
			           EXPECTED(Z_TYPE_P(arg) == IS_FALSE || Z_TYPE_P(arg) == IS_TRUE)) {
				/* pass */
			} else if (UNEXPECTED(!zend_verify_scalar_type_hint(cur_arg_info->type_hint, arg, ZEND_ARG_USES_STRICT_TYPES()))) {
				zend_verify_arg_error(zf, arg_num, "be of the type ", zend_get_type_by_const(cur_arg_info->type_hint), zend_zval_type_name(arg), "", arg);
				return 0;
			}
		}
	}
	return 1;
}

static zend_always_inline int zend_verify_missing_arg_type(zend_function *zf, uint32_t arg_num, void **cache_slot)
{
	zend_arg_info *cur_arg_info;
	char *need_msg;
	zend_class_entry *ce;

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

	if (cur_arg_info->type_hint) {
		if (cur_arg_info->class_name) {
			if (EXPECTED(*cache_slot)) {
				ce = (zend_class_entry*)*cache_slot;
			} else {
				ce = zend_verify_arg_class_kind(cur_arg_info);
				if (UNEXPECTED(!ce)) {
					zend_verify_arg_error(zf, arg_num, "be an instance of ", ZSTR_VAL(cur_arg_info->class_name), "none", "", NULL);
					return 0;
				}
				*cache_slot = (void*)ce;
			}
			need_msg =
				(ce->ce_flags & ZEND_ACC_INTERFACE) ?
				"implement interface " : "be an instance of ";
			zend_verify_arg_error(zf, arg_num, need_msg, ZSTR_VAL(ce->name), "none", "", NULL);
		} else if (cur_arg_info->type_hint == IS_CALLABLE) {
			zend_verify_arg_error(zf, arg_num, "be callable", "", "none", "", NULL);
		} else {
			zend_verify_arg_error(zf, arg_num, "be of the type ", zend_get_type_by_const(cur_arg_info->type_hint), "none", "", NULL);
		}
		return 0;
	}
	return 1;
}

static ZEND_COLD void zend_verify_missing_arg(zend_execute_data *execute_data, uint32_t arg_num, void **cache_slot)
{
	if (EXPECTED(!(EX(func)->common.fn_flags & ZEND_ACC_HAS_TYPE_HINTS)) ||
	    UNEXPECTED(zend_verify_missing_arg_type(EX(func), arg_num, cache_slot))) {
		const char *class_name = EX(func)->common.scope ? ZSTR_VAL(EX(func)->common.scope->name) : "";
		const char *space = EX(func)->common.scope ? "::" : "";
		const char *func_name = EX(func)->common.function_name ? ZSTR_VAL(EX(func)->common.function_name) : "main";
		zend_execute_data *ptr = EX(prev_execute_data);

		if (ptr && ptr->func && ZEND_USER_CODE(ptr->func->common.type)) {
			zend_error(E_WARNING, "Missing argument %u for %s%s%s(), called in %s on line %d and defined", arg_num, class_name, space, func_name, ZSTR_VAL(ptr->func->op_array.filename), ptr->opline->lineno);
		} else {
			zend_error(E_WARNING, "Missing argument %u for %s%s%s()", arg_num, class_name, space, func_name);
		}
	}
}

static ZEND_COLD void zend_verify_return_error(const zend_function *zf, const char *need_msg, const char *need_kind, const char *returned_msg, const char *returned_kind)
{
	const char *fname = ZSTR_VAL(zf->common.function_name);
	const char *fsep;
	const char *fclass;

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

	zend_type_error("Return value of %s%s%s() must %s%s, %s%s returned",
		fclass, fsep, fname, need_msg, need_kind, returned_msg, returned_kind);
}

static ZEND_COLD void zend_verify_internal_return_error(const zend_function *zf, const char *need_msg, const char *need_kind, const char *returned_msg, const char *returned_kind)
{
	const char *fname = ZSTR_VAL(zf->common.function_name);
	const char *fsep;
	const char *fclass;

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

	zend_error_noreturn(E_CORE_ERROR, "Return value of %s%s%s() must %s%s, %s%s returned",
		fclass, fsep, fname, need_msg, need_kind, returned_msg, returned_kind);
}

static ZEND_COLD void zend_verify_void_return_error(const zend_function *zf, const char *returned_msg, const char *returned_kind)
{
	const char *fname = ZSTR_VAL(zf->common.function_name);
	const char *fsep;
	const char *fclass;

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

	zend_type_error("%s%s%s() must not return a value, %s%s returned",
		fclass, fsep, fname, returned_msg, returned_kind);
}

#if ZEND_DEBUG
static int zend_verify_internal_return_type(zend_function *zf, zval *ret)
{
	zend_arg_info *ret_info = zf->common.arg_info - 1;
	char *need_msg, *class_name;
	zend_class_entry *ce;


	if (ret_info->type_hint) {
		if (EXPECTED(ret_info->type_hint == Z_TYPE_P(ret))) {
			if (ret_info->class_name) {
				need_msg = zend_verify_internal_arg_class_kind((zend_internal_arg_info *)ret_info, &class_name, &ce);
				if (!ce || !instanceof_function(Z_OBJCE_P(ret), ce)) {
					zend_verify_internal_return_error(zf, need_msg, class_name, "instance of ", ZSTR_VAL(Z_OBJCE_P(ret)->name));
					return 0;
				}
			}
		} else if (Z_TYPE_P(ret) != IS_NULL || !ret_info->allow_null) {
			if (ret_info->class_name) {
				need_msg = zend_verify_internal_arg_class_kind((zend_internal_arg_info *)ret_info, &class_name, &ce);
				zend_verify_internal_return_error(zf, need_msg, class_name, zend_zval_type_name(ret), "");
			} else if (ret_info->type_hint == IS_CALLABLE) {
				if (!zend_is_callable(ret, IS_CALLABLE_CHECK_SILENT, NULL) && (Z_TYPE_P(ret) != IS_NULL || !ret_info->allow_null)) {
					zend_verify_internal_return_error(zf, "be callable", "", zend_zval_type_name(ret), "");
					return 0;
				}
			} else if (ret_info->type_hint == _IS_BOOL &&
			           EXPECTED(Z_TYPE_P(ret) == IS_FALSE || Z_TYPE_P(ret) == IS_TRUE)) {
				/* pass */
			} else if (ret_info->type_hint == IS_VOID) {
				zend_verify_void_return_error(zf, zend_zval_type_name(ret), "");
			} else {
				/* Use strict check to verify return value of internal function */
				zend_verify_internal_return_error(zf, "be of the type ", zend_get_type_by_const(ret_info->type_hint), zend_zval_type_name(ret), "");
				return 0;
			}
		}
	}
	return 1;
}
#endif

static zend_always_inline void zend_verify_return_type(zend_function *zf, zval *ret, void **cache_slot)
{
	zend_arg_info *ret_info = zf->common.arg_info - 1;
	char *need_msg;
	zend_class_entry *ce;

	if (ret_info->type_hint) {
		if (EXPECTED(ret_info->type_hint == Z_TYPE_P(ret))) {
			if (ret_info->class_name) {
				if (EXPECTED(*cache_slot)) {
					ce = (zend_class_entry*)*cache_slot;
				} else {
					ce = zend_verify_arg_class_kind(ret_info);
					if (UNEXPECTED(!ce)) {
						zend_verify_return_error(zf, "be an instance of ", ZSTR_VAL(ret_info->class_name), "instance of ", ZSTR_VAL(Z_OBJCE_P(ret)->name));
						return;
					}
					*cache_slot = (void*)ce;
				}
				if (UNEXPECTED(!instanceof_function(Z_OBJCE_P(ret), ce))) {
					need_msg =
						(ce->ce_flags & ZEND_ACC_INTERFACE) ?
						"implement interface " : "be an instance of ";
					zend_verify_return_error(zf, need_msg, ZSTR_VAL(ce->name), "instance of ", ZSTR_VAL(Z_OBJCE_P(ret)->name));
				}
			}
		} else if (Z_TYPE_P(ret) != IS_NULL || !ret_info->allow_null) {
			if (ret_info->class_name) {
				if (EXPECTED(*cache_slot)) {
					ce = (zend_class_entry*)*cache_slot;
				} else {
					ce = zend_verify_arg_class_kind(ret_info);
					if (UNEXPECTED(!ce)) {
						zend_verify_return_error(zf, "be an instance of ", ZSTR_VAL(ret_info->class_name), zend_zval_type_name(ret), "");
						return;
					}
					*cache_slot = (void*)ce;
				}
				need_msg =
					(ce->ce_flags & ZEND_ACC_INTERFACE) ?
					"implement interface " : "be an instance of ";
				zend_verify_return_error(zf, need_msg, ZSTR_VAL(ce->name), zend_zval_type_name(ret), "");
			} else if (ret_info->type_hint == IS_CALLABLE) {
				if (!zend_is_callable(ret, IS_CALLABLE_CHECK_SILENT, NULL)) {
					zend_verify_return_error(zf, "be callable", "", zend_zval_type_name(ret), "");
				}
			} else if (ret_info->type_hint == _IS_BOOL &&
			           EXPECTED(Z_TYPE_P(ret) == IS_FALSE || Z_TYPE_P(ret) == IS_TRUE)) {
				/* pass */
			/* There would be a check here for the IS_VOID type hint, which
			 * would trigger an error because a value had been returned.
			 * However, zend_compile.c already does a compile-time check
			 * that bans `return ...;` within a void function. Thus we can skip
			 * this part of the runtime check for non-internal functions.
			 */
			} else if (UNEXPECTED(!zend_verify_scalar_type_hint(ret_info->type_hint, ret, ZEND_RET_USES_STRICT_TYPES()))) {
				zend_verify_return_error(zf, "be of the type ", zend_get_type_by_const(ret_info->type_hint), zend_zval_type_name(ret), "");
			}
		}
	}
}

static ZEND_COLD int zend_verify_missing_return_type(zend_function *zf, void **cache_slot)
{
	zend_arg_info *ret_info = zf->common.arg_info - 1;
	char *need_msg;
	zend_class_entry *ce;

	if (ret_info->type_hint && EXPECTED(ret_info->type_hint != IS_VOID)) {
		if (ret_info->class_name) {
			if (EXPECTED(*cache_slot)) {
				ce = (zend_class_entry*)*cache_slot;
			} else {
				ce = zend_verify_arg_class_kind(ret_info);
				if (UNEXPECTED(!ce)) {
					zend_verify_return_error(zf, "be an instance of ", ZSTR_VAL(ret_info->class_name), "none", "");
					return 0;
				}
				*cache_slot = (void*)ce;
			}
			need_msg =
				(ce->ce_flags & ZEND_ACC_INTERFACE) ?
				"implement interface " : "be an instance of ";
			zend_verify_return_error(zf, need_msg, ZSTR_VAL(ce->name), "none", "");
			return 0;
		} else if (ret_info->type_hint == IS_CALLABLE) {
			zend_verify_return_error(zf, "be callable", "", "none", "");
		} else {
			zend_verify_return_error(zf, "be of the type ", zend_get_type_by_const(ret_info->type_hint), "none", "");
		}
		return 0;
	}
	return 1;
}

static zend_never_inline void zend_assign_to_object_dim(zval *retval, zval *object, zval *property_name, int value_type, znode_op value_op, const zend_execute_data *execute_data)
{
	zend_free_op free_value;
 	zval *value = get_zval_ptr_deref(value_type, value_op, execute_data, &free_value, BP_VAR_R);
 	zval tmp;

	/* Note:  property_name in this case is really the array index! */
	if (!Z_OBJ_HT_P(object)->write_dimension) {
		zend_throw_error(NULL, "Cannot use object as array");
		FREE_OP(free_value);
		return;
	}

	/* separate our value if necessary */
	if (value_type == IS_CONST) {
		if (UNEXPECTED(Z_OPT_COPYABLE_P(value))) {
			ZVAL_COPY_VALUE(&tmp, value);
			zval_copy_ctor_func(&tmp);
			value = &tmp;
		}
	}

	Z_OBJ_HT_P(object)->write_dimension(object, property_name, value);

	if (retval && EXPECTED(!EG(exception))) {
		ZVAL_COPY(retval, value);
	}
	if (value_type == IS_CONST) {
		zval_ptr_dtor_nogc(value);
	} else {
		FREE_OP(free_value);
	}
}

static zend_never_inline void zend_binary_assign_op_obj_dim(zval *object, zval *property, zval *value, zval *retval, binary_op_type binary_op)
{
	zval *z;
	zval rv, res;

	if (Z_OBJ_HT_P(object)->read_dimension &&
		(z = Z_OBJ_HT_P(object)->read_dimension(object, property, BP_VAR_R, &rv)) != NULL) {

		if (Z_TYPE_P(z) == IS_OBJECT && Z_OBJ_HT_P(z)->get) {
			zval rv2;
			zval *value = Z_OBJ_HT_P(z)->get(z, &rv2);

			if (z == &rv) {
				zval_ptr_dtor(&rv);
			}
			ZVAL_COPY_VALUE(z, value);
		}
		binary_op(&res, Z_ISREF_P(z) ? Z_REFVAL_P(z) : z, value);
		Z_OBJ_HT_P(object)->write_dimension(object, property, &res);
		if (z == &rv) {
			zval_ptr_dtor(&rv);
		}
		if (retval) {
			ZVAL_COPY(retval, &res);
		}
		zval_ptr_dtor(&res);
	} else {
		zend_error(E_WARNING, "Attempt to assign property of non-object");
		if (retval) {
			ZVAL_NULL(retval);
		}
	}
}

static void zend_assign_to_string_offset(zval *str, zend_long offset, zval *value, zval *result)
{
	zend_string *old_str;
	zend_uchar c;
	size_t string_len;

	if (offset < (zend_long)(-Z_STRLEN_P(str))) {
		/* Error on negative offset */
		zend_error(E_WARNING, "Illegal string offset:  " ZEND_LONG_FMT, offset);
		zend_string_release(Z_STR_P(str));
		if (result) {
			ZVAL_NULL(result);
		}
		return;
	}

	if (Z_TYPE_P(value) != IS_STRING) {
		/* Convert to string, just the time to pick the 1st byte */
		zend_string *tmp = zval_get_string(value);

		string_len = ZSTR_LEN(tmp);
		c = (zend_uchar)ZSTR_VAL(tmp)[0];
		zend_string_release(tmp);
	} else {
		string_len = Z_STRLEN_P(value);
		c = (zend_uchar)Z_STRVAL_P(value)[0];
	}

	if (string_len == 0) {
		/* Error on empty input string */
		zend_error(E_WARNING, "Cannot assign an empty string to a string offset");
		zend_string_release(Z_STR_P(str));
		if (result) {
			ZVAL_NULL(result);
		}
		return;
	}

	if (offset < 0) { /* Handle negative offset */
		offset += (zend_long)Z_STRLEN_P(str);
	}

	old_str = Z_STR_P(str);
	if ((size_t)offset >= Z_STRLEN_P(str)) {
		/* Extend string if needed */
		zend_long old_len = Z_STRLEN_P(str);
		Z_STR_P(str) = zend_string_extend(Z_STR_P(str), offset + 1, 0);
		Z_TYPE_INFO_P(str) = IS_STRING_EX;
		memset(Z_STRVAL_P(str) + old_len, ' ', offset - old_len);
		Z_STRVAL_P(str)[offset+1] = 0;
	} else if (!Z_REFCOUNTED_P(str)) {
		Z_STR_P(str) = zend_string_init(Z_STRVAL_P(str), Z_STRLEN_P(str), 0);
		Z_TYPE_INFO_P(str) = IS_STRING_EX;
	}

	Z_STRVAL_P(str)[offset] = c;

	zend_string_release(old_str);
	if (result) {
		/* Return the new character */
		if (CG(one_char_string)[c]) {
			ZVAL_INTERNED_STR(result, CG(one_char_string)[c]);
		} else {
			ZVAL_NEW_STR(result, zend_string_init(Z_STRVAL_P(str) + offset, 1, 0));
		}
	}
}

static zend_never_inline void zend_post_incdec_overloaded_property(zval *object, zval *property, void **cache_slot, int inc, zval *result)
{
	if (Z_OBJ_HT_P(object)->read_property && Z_OBJ_HT_P(object)->write_property) {
		zval rv, obj;
		zval *z;
		zval z_copy;

		ZVAL_OBJ(&obj, Z_OBJ_P(object));
		Z_ADDREF(obj);
		z = Z_OBJ_HT(obj)->read_property(&obj, property, BP_VAR_R, cache_slot, &rv);
		if (UNEXPECTED(EG(exception))) {
			OBJ_RELEASE(Z_OBJ(obj));
			return;
		}

		if (UNEXPECTED(Z_TYPE_P(z) == IS_OBJECT) && Z_OBJ_HT_P(z)->get) {
			zval rv2;
			zval *value = Z_OBJ_HT_P(z)->get(z, &rv2);
			if (z == &rv) {
				zval_ptr_dtor(&rv);
			}
			ZVAL_COPY_VALUE(z, value);
		}

		if (UNEXPECTED(Z_TYPE_P(z) == IS_REFERENCE)) {
			ZVAL_COPY(result, Z_REFVAL_P(z));
		} else {
			ZVAL_COPY(result, z);
		}
		ZVAL_DUP(&z_copy, result);
		if (inc) {
			increment_function(&z_copy);
		} else {
			decrement_function(&z_copy);
		}
		Z_OBJ_HT(obj)->write_property(&obj, property, &z_copy, cache_slot);
		OBJ_RELEASE(Z_OBJ(obj));
		zval_ptr_dtor(&z_copy);
		zval_ptr_dtor(z);
	} else {
		zend_error(E_WARNING, "Attempt to increment/decrement property of non-object");
		ZVAL_NULL(result);
	}
}

static zend_never_inline void zend_pre_incdec_overloaded_property(zval *object, zval *property, void **cache_slot, int inc, zval *result)
{
	zval rv;

	if (Z_OBJ_HT_P(object)->read_property && Z_OBJ_HT_P(object)->write_property) {
		zval *z, obj;
				
		ZVAL_OBJ(&obj, Z_OBJ_P(object));
		Z_ADDREF(obj);
		z = Z_OBJ_HT(obj)->read_property(&obj, property, BP_VAR_R, cache_slot, &rv);
		if (UNEXPECTED(EG(exception))) {
			OBJ_RELEASE(Z_OBJ(obj));
			return;
		}

		if (UNEXPECTED(Z_TYPE_P(z) == IS_OBJECT) && Z_OBJ_HT_P(z)->get) {
			zval rv2;
			zval *value = Z_OBJ_HT_P(z)->get(z, &rv2);

			if (z == &rv) {
				zval_ptr_dtor(&rv);
			}
			ZVAL_COPY_VALUE(z, value);
		}
		ZVAL_DEREF(z);
		SEPARATE_ZVAL_NOREF(z);
		if (inc) {
			increment_function(z);
		} else {
			decrement_function(z);
		}
		if (UNEXPECTED(result)) {
			ZVAL_COPY(result, z);
		}
		Z_OBJ_HT(obj)->write_property(&obj, property, z, cache_slot);
		OBJ_RELEASE(Z_OBJ(obj));
		zval_ptr_dtor(z);
	} else {
		zend_error(E_WARNING, "Attempt to increment/decrement property of non-object");
		if (UNEXPECTED(result)) {
			ZVAL_NULL(result);
		}
	}
}

static zend_never_inline void zend_assign_op_overloaded_property(zval *object, zval *property, void **cache_slot, zval *value, binary_op_type binary_op, zval *result)
{
	zval *z;
	zval rv, obj;
	zval *zptr;

	ZVAL_OBJ(&obj, Z_OBJ_P(object));
	Z_ADDREF(obj);
	if (EXPECTED(Z_OBJ_HT(obj)->read_property)) {
		z = Z_OBJ_HT(obj)->read_property(&obj, property, BP_VAR_R, cache_slot, &rv);
		if (UNEXPECTED(EG(exception))) {
			OBJ_RELEASE(Z_OBJ(obj));
			return;
		}
		if (Z_TYPE_P(z) == IS_OBJECT && Z_OBJ_HT_P(z)->get) {
			zval rv2;
			zval *value = Z_OBJ_HT_P(z)->get(z, &rv2);

			if (z == &rv) {
				zval_ptr_dtor(&rv);
			}
			ZVAL_COPY_VALUE(z, value);
		}
		zptr = z;
		ZVAL_DEREF(z);
		SEPARATE_ZVAL_NOREF(z);
		binary_op(z, z, value);
		Z_OBJ_HT(obj)->write_property(&obj, property, z, cache_slot);
		if (UNEXPECTED(result)) {
			ZVAL_COPY(result, z);
		}
		zval_ptr_dtor(zptr);
	} else {
		zend_error(E_WARNING, "Attempt to assign property of non-object");
		if (UNEXPECTED(result)) {
			ZVAL_NULL(result);
		}
	}
	OBJ_RELEASE(Z_OBJ(obj));
}

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


static zend_always_inline HashTable *zend_get_target_symbol_table(zend_execute_data *execute_data, int fetch_type)
{
	HashTable *ht;

	if (EXPECTED(fetch_type == ZEND_FETCH_GLOBAL_LOCK) ||
	    EXPECTED(fetch_type == ZEND_FETCH_GLOBAL)) {
		ht = &EG(symbol_table);
	} else {
		ZEND_ASSERT(fetch_type == ZEND_FETCH_LOCAL);
		if (!EX(symbol_table)) {
			zend_rebuild_symbol_table();
		}
		ht = EX(symbol_table);
	}
	return ht;
}

static zend_always_inline zval *zend_fetch_dimension_address_inner(HashTable *ht, const zval *dim, int dim_type, int type)
{
	zval *retval;
	zend_string *offset_key;
	zend_ulong hval;

try_again:
	if (EXPECTED(Z_TYPE_P(dim) == IS_LONG)) {
		hval = Z_LVAL_P(dim);
num_index:
		retval = zend_hash_index_find(ht, hval);
		if (retval == NULL) {
			switch (type) {
				case BP_VAR_R:
					zend_error(E_NOTICE,"Undefined offset: " ZEND_LONG_FMT, hval);
					/* break missing intentionally */
				case BP_VAR_UNSET:
				case BP_VAR_IS:
					retval = &EG(uninitialized_zval);
					break;
				case BP_VAR_RW:
					zend_error(E_NOTICE,"Undefined offset: " ZEND_LONG_FMT, hval);
					retval = zend_hash_index_update(ht, hval, &EG(uninitialized_zval));
					break;
				case BP_VAR_W:
					retval = zend_hash_index_add_new(ht, hval, &EG(uninitialized_zval));
					break;
			}
		}
	} else if (EXPECTED(Z_TYPE_P(dim) == IS_STRING)) {
		offset_key = Z_STR_P(dim);
		if (dim_type != IS_CONST) {
			if (ZEND_HANDLE_NUMERIC(offset_key, hval)) {
				goto num_index;
			}
		}
str_index:
		retval = zend_hash_find(ht, offset_key);
		if (retval) {
			/* support for $GLOBALS[...] */
			if (UNEXPECTED(Z_TYPE_P(retval) == IS_INDIRECT)) {
				retval = Z_INDIRECT_P(retval);
				if (UNEXPECTED(Z_TYPE_P(retval) == IS_UNDEF)) {
					switch (type) {
						case BP_VAR_R:
							zend_error(E_NOTICE, "Undefined index: %s", ZSTR_VAL(offset_key));
							/* break missing intentionally */
						case BP_VAR_UNSET:
						case BP_VAR_IS:
							retval = &EG(uninitialized_zval);
							break;
						case BP_VAR_RW:
							zend_error(E_NOTICE,"Undefined index: %s", ZSTR_VAL(offset_key));
							/* break missing intentionally */
						case BP_VAR_W:
							ZVAL_NULL(retval);
							break;
					}
				}
			}
		} else {
			switch (type) {
				case BP_VAR_R:
					zend_error(E_NOTICE, "Undefined index: %s", ZSTR_VAL(offset_key));
					/* break missing intentionally */
				case BP_VAR_UNSET:
				case BP_VAR_IS:
					retval = &EG(uninitialized_zval);
					break;
				case BP_VAR_RW:
					zend_error(E_NOTICE,"Undefined index: %s", ZSTR_VAL(offset_key));
					retval = zend_hash_update(ht, offset_key, &EG(uninitialized_zval));
					break;
				case BP_VAR_W:
					retval = zend_hash_add_new(ht, offset_key, &EG(uninitialized_zval));
					break;
			}
		}
	} else {
		switch (Z_TYPE_P(dim)) {
			case IS_NULL:
				offset_key = ZSTR_EMPTY_ALLOC();
				goto str_index;
			case IS_DOUBLE:
				hval = zend_dval_to_lval(Z_DVAL_P(dim));
				goto num_index;
			case IS_RESOURCE:
				zend_error(E_NOTICE, "Resource ID#%pd used as offset, casting to integer (%pd)", Z_RES_HANDLE_P(dim), Z_RES_HANDLE_P(dim));
				hval = Z_RES_HANDLE_P(dim);
				goto num_index;
			case IS_FALSE:
				hval = 0;
				goto num_index;
			case IS_TRUE:
				hval = 1;
				goto num_index;
			case IS_REFERENCE:
				dim = Z_REFVAL_P(dim);
				goto try_again;
			default:
				zend_error(E_WARNING, "Illegal offset type");
				retval = (type == BP_VAR_W || type == BP_VAR_RW) ?
					NULL : &EG(uninitialized_zval);
		}
	}
	return retval;
}

static zend_never_inline zend_long zend_check_string_offset(zval *dim, int type)
{
	zend_long offset;

try_again:
	if (UNEXPECTED(Z_TYPE_P(dim) != IS_LONG)) {
		switch(Z_TYPE_P(dim)) {
			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'", Z_STRVAL_P(dim));
				}
				break;
			case IS_DOUBLE:
			case IS_NULL:
			case IS_FALSE:
			case IS_TRUE:
				zend_error(E_NOTICE, "String offset cast occurred");
				break;
			case IS_REFERENCE:
				dim = Z_REFVAL_P(dim);
				goto try_again;
			default:
				zend_error(E_WARNING, "Illegal offset type");
				break;
		}

		offset = zval_get_long(dim);
	} else {
		offset = Z_LVAL_P(dim);
	}

	return offset;
}

static zend_never_inline ZEND_COLD void zend_wrong_string_offset(void)
{
	const char *msg = NULL;
	const zend_op *opline = EG(current_execute_data)->opline;
	const zend_op *end;
	uint32_t var;

	switch (opline->opcode) {
		case ZEND_ASSIGN_ADD:
		case ZEND_ASSIGN_SUB:
		case ZEND_ASSIGN_MUL:
		case ZEND_ASSIGN_DIV:
		case ZEND_ASSIGN_MOD:
		case ZEND_ASSIGN_SL:
		case ZEND_ASSIGN_SR:
		case ZEND_ASSIGN_CONCAT:
		case ZEND_ASSIGN_BW_OR:
		case ZEND_ASSIGN_BW_AND:
		case ZEND_ASSIGN_BW_XOR:
		case ZEND_ASSIGN_POW:
			msg = "Cannot use assign-op operators with string offsets";
			break;
		case ZEND_FETCH_DIM_W:
		case ZEND_FETCH_DIM_RW:
		case ZEND_FETCH_DIM_FUNC_ARG:
		case ZEND_FETCH_DIM_UNSET:
			/* TODO: Encode the "reason" into opline->extended_value??? */
			var = opline->result.var;
			opline++;
			end = EG(current_execute_data)->func->op_array.opcodes +
				EG(current_execute_data)->func->op_array.last;
			while (opline < end) {
				if (opline->op1_type == IS_VAR && opline->op1.var == var) {
					switch (opline->opcode) {
						case ZEND_ASSIGN_ADD:
						case ZEND_ASSIGN_SUB:
						case ZEND_ASSIGN_MUL:
						case ZEND_ASSIGN_DIV:
						case ZEND_ASSIGN_MOD:
						case ZEND_ASSIGN_SL:
						case ZEND_ASSIGN_SR:
						case ZEND_ASSIGN_CONCAT:
						case ZEND_ASSIGN_BW_OR:
						case ZEND_ASSIGN_BW_AND:
						case ZEND_ASSIGN_BW_XOR:
						case ZEND_ASSIGN_POW:
							if (opline->extended_value == ZEND_ASSIGN_OBJ) {
								msg = "Cannot use string offset as an object";
							} else if (opline->extended_value == ZEND_ASSIGN_DIM) {
								msg = "Cannot use string offset as an array";
							} else {
								msg = "Cannot use assign-op operators with string offsets";
							}
							break;
						case ZEND_PRE_INC_OBJ:
						case ZEND_PRE_DEC_OBJ:
						case ZEND_POST_INC_OBJ:
						case ZEND_POST_DEC_OBJ:
						case ZEND_PRE_INC:
						case ZEND_PRE_DEC:
						case ZEND_POST_INC:
						case ZEND_POST_DEC:
							msg = "Cannot increment/decrement string offsets";
							break;
						case ZEND_FETCH_DIM_W:
						case ZEND_FETCH_DIM_RW:
						case ZEND_FETCH_DIM_FUNC_ARG:
						case ZEND_FETCH_DIM_UNSET:
						case ZEND_ASSIGN_DIM:
							msg = "Cannot use string offset as an array";
							break;
						case ZEND_FETCH_OBJ_W:
						case ZEND_FETCH_OBJ_RW:
						case ZEND_FETCH_OBJ_FUNC_ARG:
						case ZEND_FETCH_OBJ_UNSET:
						case ZEND_ASSIGN_OBJ:
							msg = "Cannot use string offset as an object";
							break;
						case ZEND_ASSIGN_REF:
						case ZEND_ADD_ARRAY_ELEMENT:
						case ZEND_INIT_ARRAY:
							msg = "Cannot create references to/from string offsets";
							break;
						case ZEND_RETURN_BY_REF:
							msg = "Cannot return string offsets by reference";
							break;
						case ZEND_UNSET_DIM:
						case ZEND_UNSET_OBJ:
							msg = "Cannot unset string offsets";
							break;
						case ZEND_YIELD:
							msg = "Cannot yield string offsets by reference";
							break;
						case ZEND_SEND_REF:
						case ZEND_SEND_VAR_EX:
							msg = "Only variables can be passed by reference";
							break;
						EMPTY_SWITCH_DEFAULT_CASE();
					}
					break;
				}
				if (opline->op2_type == IS_VAR && opline->op2.var == var) {
					ZEND_ASSERT(opline->opcode == ZEND_ASSIGN_REF);
					msg = "Cannot create references to/from string offsets";
					break;
				}
			}
			break;
		EMPTY_SWITCH_DEFAULT_CASE();
	}
	ZEND_ASSERT(msg != NULL);
	zend_throw_error(NULL, msg);
}

static zend_always_inline zend_long zend_fetch_string_offset(zval *container, zval *dim, int type)
{
	zend_long offset = zend_check_string_offset(dim, type);

	if (Z_REFCOUNTED_P(container)) {
		if (Z_REFCOUNT_P(container) > 1) {
			Z_DELREF_P(container);
			zval_copy_ctor_func(container);
		}
		Z_ADDREF_P(container);
	}
	return offset;
}

static zend_always_inline void zend_fetch_dimension_address(zval *result, zval *container, zval *dim, int dim_type, int type)
{
    zval *retval;

	if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
try_array:
		SEPARATE_ARRAY(container);
fetch_from_array:
		if (dim == NULL) {
			retval = zend_hash_next_index_insert(Z_ARRVAL_P(container), &EG(uninitialized_zval));
			if (UNEXPECTED(retval == NULL)) {
				zend_error(E_WARNING, "Cannot add element to the array as the next element is already occupied");
				ZVAL_ERROR(result);
				return;
			}
		} else {
			retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type);
			if (UNEXPECTED(!retval)) {
				ZVAL_ERROR(result);
				return;
			}
		}
		ZVAL_INDIRECT(result, retval);
		return;
	} else if (EXPECTED(Z_TYPE_P(container) == IS_REFERENCE)) {
		container = Z_REFVAL_P(container);
		if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
			goto try_array;
		}
	}
	if (EXPECTED(Z_TYPE_P(container) == IS_STRING)) {
		if (type != BP_VAR_UNSET && UNEXPECTED(Z_STRLEN_P(container) == 0)) {
			zval_ptr_dtor_nogc(container);
convert_to_array:
			ZVAL_NEW_ARR(container);
			zend_hash_init(Z_ARRVAL_P(container), 8, NULL, ZVAL_PTR_DTOR, 0);
			goto fetch_from_array;
		}

		if (dim == NULL) {
			zend_throw_error(NULL, "[] operator not supported for strings");
		} else {
			zend_check_string_offset(dim, type);
			zend_wrong_string_offset();
		}
		ZVAL_ERROR(result);
	} else if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
		if (!Z_OBJ_HT_P(container)->read_dimension) {
			zend_throw_error(NULL, "Cannot use object as array");
			ZVAL_ERROR(result);
		} else {
			retval = Z_OBJ_HT_P(container)->read_dimension(container, dim, type, result);

			if (UNEXPECTED(retval == &EG(uninitialized_zval))) {
				zend_class_entry *ce = Z_OBJCE_P(container);

				ZVAL_NULL(result);
				zend_error(E_NOTICE, "Indirect modification of overloaded element of %s has no effect", ZSTR_VAL(ce->name));
			} else if (EXPECTED(retval && Z_TYPE_P(retval) != IS_UNDEF)) {
				if (!Z_ISREF_P(retval)) {
					if (Z_REFCOUNTED_P(retval) &&
					    Z_REFCOUNT_P(retval) > 1) {
						if (Z_TYPE_P(retval) != IS_OBJECT) {
							Z_DELREF_P(retval);
							ZVAL_DUP(result, retval);
							retval = result;
						} else {
							ZVAL_COPY_VALUE(result, retval);
							retval = result;
						}
					}
					if (Z_TYPE_P(retval) != IS_OBJECT) {
						zend_class_entry *ce = Z_OBJCE_P(container);
						zend_error(E_NOTICE, "Indirect modification of overloaded element of %s has no effect", ZSTR_VAL(ce->name));
					}
				} else if (UNEXPECTED(Z_REFCOUNT_P(retval) == 1)) {
					ZVAL_UNREF(retval);
				}
				if (result != retval) {
					ZVAL_INDIRECT(result, retval);
				}
			} else {
				ZVAL_ERROR(result);
			}
		}
	} else if (EXPECTED(Z_TYPE_P(container) <= IS_FALSE)) {
		if (type != BP_VAR_UNSET) {
			goto convert_to_array;
		} else {
			/* for read-mode only */
			ZVAL_NULL(result);
		}
	} else if (EXPECTED(Z_ISERROR_P(container))) {
		ZVAL_ERROR(result);
	} else {
		if (type == BP_VAR_UNSET) {
			zend_error(E_WARNING, "Cannot unset offset in a non-array variable");
			ZVAL_NULL(result);
		} else {
			zend_error(E_WARNING, "Cannot use a scalar value as an array");
			ZVAL_ERROR(result);
		}
	}
}

static zend_never_inline void zend_fetch_dimension_address_W(zval *result, zval *container_ptr, zval *dim, int dim_type)
{
	zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_W);
}

static zend_never_inline void zend_fetch_dimension_address_RW(zval *result, zval *container_ptr, zval *dim, int dim_type)
{
	zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_RW);
}

static zend_never_inline void zend_fetch_dimension_address_UNSET(zval *result, zval *container_ptr, zval *dim, int dim_type)
{
	zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_UNSET);
}

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

	if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
try_array:
		retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type);
		ZVAL_COPY(result, retval);
		return;
	} else if (EXPECTED(Z_TYPE_P(container) == IS_REFERENCE)) {
		container = Z_REFVAL_P(container);
		if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
			goto try_array;
		}
	}
	if (EXPECTED(Z_TYPE_P(container) == IS_STRING)) {
		zend_long offset;

try_string_offset:
		if (UNEXPECTED(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) {
						ZVAL_NULL(result);
						return;
					}
					zend_error(E_WARNING, "Illegal string offset '%s'", Z_STRVAL_P(dim));
					break;
				case IS_DOUBLE:
				case IS_NULL:
				case IS_FALSE:
				case IS_TRUE:
					if (type != BP_VAR_IS) {
						zend_error(E_NOTICE, "String offset cast occurred");
					}
					break;
				case IS_REFERENCE:
					dim = Z_REFVAL_P(dim);
					goto try_string_offset;
				default:
					zend_error(E_WARNING, "Illegal offset type");
					break;
			}

			offset = zval_get_long(dim);
		} else {
			offset = Z_LVAL_P(dim);
		}

		if (UNEXPECTED(Z_STRLEN_P(container) < (size_t)((offset < 0) ? -offset : (offset + 1)))) {
			if (type != BP_VAR_IS) {
				zend_error(E_NOTICE, "Uninitialized string offset: %pd", offset);
				ZVAL_EMPTY_STRING(result);
			} else {
				ZVAL_NULL(result);
			}
		} else {
			zend_uchar c;
			zend_long real_offset;

			real_offset = (UNEXPECTED(offset < 0)) /* Handle negative offset */
				? (zend_long)Z_STRLEN_P(container) + offset : offset;
			c = (zend_uchar)Z_STRVAL_P(container)[real_offset];

			if (CG(one_char_string)[c]) {
				ZVAL_INTERNED_STR(result, CG(one_char_string)[c]);
			} else {
				ZVAL_NEW_STR(result, zend_string_init(Z_STRVAL_P(container) + real_offset, 1, 0));
			}
		}
	} else if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
		if (!Z_OBJ_HT_P(container)->read_dimension) {
			zend_throw_error(NULL, "Cannot use object as array");
			ZVAL_NULL(result);
		} else {
			retval = Z_OBJ_HT_P(container)->read_dimension(container, dim, type, result);

			ZEND_ASSERT(result != NULL);
			if (retval) {
				if (result != retval) {
					ZVAL_COPY(result, retval);
				}
			} else {
				ZVAL_NULL(result);
			}
		}
	} else {
		ZVAL_NULL(result);
	}
}

static zend_never_inline void zend_fetch_dimension_address_read_R(zval *result, zval *container, zval *dim, int dim_type)
{
	zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_R);
}

static zend_never_inline void zend_fetch_dimension_address_read_IS(zval *result, zval *container, zval *dim, int dim_type)
{
	zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_IS);
}

ZEND_API void zend_fetch_dimension_by_zval(zval *result, zval *container, zval *dim)
{
	zend_fetch_dimension_address_read_R(result, container, dim, IS_TMP_VAR);
}

static zend_always_inline void zend_fetch_property_address(zval *result, zval *container, uint32_t container_op_type, zval *prop_ptr, uint32_t prop_op_type, void **cache_slot, int type)
{
    if (container_op_type != IS_UNUSED && UNEXPECTED(Z_TYPE_P(container) != IS_OBJECT)) {
		do {
			if (container_op_type == IS_VAR && UNEXPECTED(Z_ISERROR_P(container))) {
				ZVAL_ERROR(result);
				return;
			}

			if (Z_ISREF_P(container)) {
				container = Z_REFVAL_P(container);
				if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
					break;
				}
			}

			/* this should modify object only if it's empty */
			if (type != BP_VAR_UNSET &&
			    EXPECTED(Z_TYPE_P(container) <= IS_FALSE ||
			      (Z_TYPE_P(container) == IS_STRING && Z_STRLEN_P(container)==0))) {
				zval_ptr_dtor_nogc(container);
				object_init(container);
			} else {
				zend_error(E_WARNING, "Attempt to modify property of non-object");
				ZVAL_ERROR(result);
				return;
			}
		} while (0);
	}
	if (prop_op_type == IS_CONST &&
	    EXPECTED(Z_OBJCE_P(container) == CACHED_PTR_EX(cache_slot))) {
		uint32_t prop_offset = (uint32_t)(intptr_t)CACHED_PTR_EX(cache_slot + 1);
		zend_object *zobj = Z_OBJ_P(container);
		zval *retval;

		if (EXPECTED(prop_offset != (uint32_t)ZEND_DYNAMIC_PROPERTY_OFFSET)) {
			retval = OBJ_PROP(zobj, prop_offset);
			if (EXPECTED(Z_TYPE_P(retval) != IS_UNDEF)) {
				ZVAL_INDIRECT(result, retval);
				return;
			}
		} else if (EXPECTED(zobj->properties != NULL)) {
			if (UNEXPECTED(GC_REFCOUNT(zobj->properties) > 1)) {
				if (EXPECTED(!(GC_FLAGS(zobj->properties) & IS_ARRAY_IMMUTABLE))) {
					GC_REFCOUNT(zobj->properties)--;
				}
				zobj->properties = zend_array_dup(zobj->properties);
			}
			retval = zend_hash_find(zobj->properties, Z_STR_P(prop_ptr));
			if (EXPECTED(retval)) {
				ZVAL_INDIRECT(result, retval);
				return;
			}
		}
	}
	if (EXPECTED(Z_OBJ_HT_P(container)->get_property_ptr_ptr)) {
		zval *ptr = Z_OBJ_HT_P(container)->get_property_ptr_ptr(container, prop_ptr, type, cache_slot);
		if (NULL == ptr) {
			if (EXPECTED(Z_OBJ_HT_P(container)->read_property)) {
				ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, type, cache_slot, result);
				if (ptr != result) {
					ZVAL_INDIRECT(result, ptr);
				} else if (UNEXPECTED(Z_ISREF_P(ptr) && Z_REFCOUNT_P(ptr) == 1)) {
					ZVAL_UNREF(ptr);
				}
			} else {
				zend_throw_error(NULL, "Cannot access undefined property for object with overloaded property access");
				ZVAL_ERROR(result);
			}
		} else {
			ZVAL_INDIRECT(result, ptr);
		}
	} else if (EXPECTED(Z_OBJ_HT_P(container)->read_property)) {
		zval *ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, type, cache_slot, result);
		if (ptr != result) {
			ZVAL_INDIRECT(result, ptr);
		} else if (UNEXPECTED(Z_ISREF_P(ptr) && Z_REFCOUNT_P(ptr) == 1)) {
			ZVAL_UNREF(ptr);
		}
	} else {
		zend_error(E_WARNING, "This object doesn't support property references");
		ZVAL_ERROR(result);
	}
}

#if ZEND_INTENSIVE_DEBUGGING

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

static int zend_check_symbol(zval *pz)
{
	if (Z_TYPE_P(pz) == IS_INDIRECT) {
		pz = Z_INDIRECT_P(pz);
	}
	if (Z_TYPE_P(pz) > 10) {
		fprintf(stderr, "Warning!  %x has invalid type!\n", *pz);
/* See http://support.microsoft.com/kb/190351 */
#ifdef ZEND_WIN32
		fflush(stderr);
#endif
	} else if (Z_TYPE_P(pz) == IS_ARRAY) {
		zend_hash_apply(Z_ARRVAL_P(pz), zend_check_symbol);
	} else if (Z_TYPE_P(pz) == IS_OBJECT) {
		/* OBJ-TBI - doesn't support new object model! */
		zend_hash_apply(Z_OBJPROP_P(pz), zend_check_symbol);
	}

	return 0;
}


#else
#define CHECK_SYMBOL_TABLES()
#endif

ZEND_API void execute_internal(zend_execute_data *execute_data, zval *return_value)
{
	execute_data->func->internal_function.handler(execute_data, return_value);
}

ZEND_API void zend_clean_and_cache_symbol_table(zend_array *symbol_table) /* {{{ */
{
	if (EG(symtable_cache_ptr) >= EG(symtable_cache_limit)) {
		zend_array_destroy(symbol_table);
	} else {
		/* clean before putting into the cache, since clean
		   could call dtors, which could use cached hash */
		zend_symtable_clean(symbol_table);
		*(++EG(symtable_cache_ptr)) = symbol_table;
	}
}
/* }}} */

static zend_always_inline void i_free_compiled_variables(zend_execute_data *execute_data) /* {{{ */
{
	zval *cv = EX_VAR_NUM(0);
	zval *end = cv + EX(func)->op_array.last_var;
	while (EXPECTED(cv != end)) {
		if (Z_REFCOUNTED_P(cv)) {
			if (!Z_DELREF_P(cv)) {
				zend_refcounted *r = Z_COUNTED_P(cv);
				ZVAL_NULL(cv);
				zval_dtor_func_for_ptr(r);
			} else {
				GC_ZVAL_CHECK_POSSIBLE_ROOT(cv);
			}
		}
		cv++;
 	}
}
/* }}} */

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

#ifdef ZEND_WIN32
# define ZEND_VM_INTERRUPT_CHECK() do { \
		if (EG(timed_out)) { \
			zend_timeout(0); \
		} \
	} while (0)
#else
# define ZEND_VM_INTERRUPT_CHECK() do { \
	} while (0)
#endif

/*
 * Stack Frame Layout (the whole stack frame is allocated at once)
 * ==================
 *
 *                             +========================================+
 * EG(current_execute_data) -> | zend_execute_data                      |
 *                             +----------------------------------------+
 *     EX_CV_NUM(0) ---------> | VAR[0] = ARG[1]                        |
 *                             | ...                                    |
 *                             | VAR[op_array->num_args-1] = ARG[N]     |
 *                             | ...                                    |
 *                             | VAR[op_array->last_var-1]              |
 *                             | VAR[op_array->last_var] = TMP[0]       |
 *                             | ...                                    |
 *                             | VAR[op_array->last_var+op_array->T-1]  |
 *                             | ARG[N+1] (extra_args)                  |
 *                             | ...                                    |
 *                             +----------------------------------------+
 */

static zend_always_inline void i_init_func_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value, int check_this) /* {{{ */
{
	uint32_t first_extra_arg, num_args;
	ZEND_ASSERT(EX(func) == (zend_function*)op_array);

	EX(opline) = op_array->opcodes;
	EX(call) = NULL;
	EX(return_value) = return_value;

	/* Handle arguments */
	first_extra_arg = op_array->num_args;
	num_args = EX_NUM_ARGS();
	if (UNEXPECTED(num_args > first_extra_arg)) {
		if (EXPECTED(!(op_array->fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE))) {
			zval *end, *src, *dst;
			uint32_t type_flags = 0;

			if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
				/* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
				EX(opline) += first_extra_arg;
			}

			/* move extra args into separate array after all CV and TMP vars */
			end = EX_VAR_NUM(first_extra_arg - 1);
			src = end + (num_args - first_extra_arg);
			dst = src + (op_array->last_var + op_array->T - first_extra_arg);
			if (EXPECTED(src != dst)) {
				do {
					type_flags |= Z_TYPE_INFO_P(src);
					ZVAL_COPY_VALUE(dst, src);
					ZVAL_UNDEF(src);
					src--;
					dst--;
				} while (src != end);
			} else {
				do {
					type_flags |= Z_TYPE_INFO_P(src);
					src--;
				} while (src != end);
			}
			ZEND_ADD_CALL_FLAG(execute_data, ((type_flags >> Z_TYPE_FLAGS_SHIFT) & IS_TYPE_REFCOUNTED));
		}
	} else if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
		/* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
		EX(opline) += num_args;
	}

	/* Initialize CV variables (skip arguments) */
	if (EXPECTED((int)num_args < op_array->last_var)) {
		zval *var = EX_VAR_NUM(num_args);
		zval *end = EX_VAR_NUM(op_array->last_var);

		do {
			ZVAL_UNDEF(var);
			var++;
		} while (var != end);
	}

	if (check_this && op_array->this_var != (uint32_t)-1 && EXPECTED(Z_OBJ(EX(This)))) {
		ZVAL_OBJ(EX_VAR(op_array->this_var), Z_OBJ(EX(This)));
		GC_REFCOUNT(Z_OBJ(EX(This)))++;
	}

	if (UNEXPECTED(!op_array->run_time_cache)) {
		op_array->run_time_cache = zend_arena_alloc(&CG(arena), op_array->cache_size);
		memset(op_array->run_time_cache, 0, op_array->cache_size);
	}
	EX_LOAD_RUN_TIME_CACHE(op_array);
	EX_LOAD_LITERALS(op_array);

	EG(current_execute_data) = execute_data;
	ZEND_VM_INTERRUPT_CHECK();
}
/* }}} */

static zend_always_inline void i_init_code_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
{
	ZEND_ASSERT(EX(func) == (zend_function*)op_array);

	EX(opline) = op_array->opcodes;
	EX(call) = NULL;
	EX(return_value) = return_value;

	if (UNEXPECTED(op_array->this_var != (uint32_t)-1) && EXPECTED(Z_OBJ(EX(This)))) {
		GC_REFCOUNT(Z_OBJ(EX(This)))++;
		if (!zend_hash_str_add(EX(symbol_table), "this", sizeof("this")-1, &EX(This))) {
			GC_REFCOUNT(Z_OBJ(EX(This)))--;
		}
	}

	zend_attach_symbol_table(execute_data);

	if (!op_array->run_time_cache) {
		op_array->run_time_cache = emalloc(op_array->cache_size);
		memset(op_array->run_time_cache, 0, op_array->cache_size);
	}
	EX_LOAD_RUN_TIME_CACHE(op_array);
	EX_LOAD_LITERALS(op_array);

	EG(current_execute_data) = execute_data;
	ZEND_VM_INTERRUPT_CHECK();
}
/* }}} */

static zend_always_inline void i_init_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
{
	ZEND_ASSERT(EX(func) == (zend_function*)op_array);

	EX(opline) = op_array->opcodes;
	EX(call) = NULL;
	EX(return_value) = return_value;

	if (UNEXPECTED(EX(symbol_table) != NULL)) {
		if (UNEXPECTED(op_array->this_var != (uint32_t)-1) && EXPECTED(Z_OBJ(EX(This)))) {
			GC_REFCOUNT(Z_OBJ(EX(This)))++;
			if (!zend_hash_str_add(EX(symbol_table), "this", sizeof("this")-1, &EX(This))) {
				GC_REFCOUNT(Z_OBJ(EX(This)))--;
			}
		}

		zend_attach_symbol_table(execute_data);
	} else {
		uint32_t first_extra_arg, num_args;

		/* Handle arguments */
		first_extra_arg = op_array->num_args;
		num_args = EX_NUM_ARGS();
		if (UNEXPECTED(num_args > first_extra_arg)) {
			if (EXPECTED(!(op_array->fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE))) {
				zval *end, *src, *dst;
				uint32_t type_flags = 0;

				if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
					/* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
					EX(opline) += first_extra_arg;
				}

				/* move extra args into separate array after all CV and TMP vars */
				end = EX_VAR_NUM(first_extra_arg - 1);
				src = end + (num_args - first_extra_arg);
				dst = src + (op_array->last_var + op_array->T - first_extra_arg);
				if (EXPECTED(src != dst)) {
					do {
						type_flags |= Z_TYPE_INFO_P(src);
						ZVAL_COPY_VALUE(dst, src);
						ZVAL_UNDEF(src);
						src--;
						dst--;
					} while (src != end);
				} else {
					do {
						type_flags |= Z_TYPE_INFO_P(src);
						src--;
					} while (src != end);
				}
				ZEND_ADD_CALL_FLAG(execute_data, ((type_flags >> Z_TYPE_FLAGS_SHIFT) & IS_TYPE_REFCOUNTED));
			}
		} else if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
			/* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
			EX(opline) += num_args;
		}

		/* Initialize CV variables (skip arguments) */
		if (EXPECTED((int)num_args < op_array->last_var)) {
			zval *var = EX_VAR_NUM(num_args);
			zval *end = EX_VAR_NUM(op_array->last_var);

			do {
				ZVAL_UNDEF(var);
				var++;
			} while (var != end);
		}

		if (op_array->this_var != (uint32_t)-1 && EXPECTED(Z_OBJ(EX(This)))) {
			ZVAL_OBJ(EX_VAR(op_array->this_var), Z_OBJ(EX(This)));
			GC_REFCOUNT(Z_OBJ(EX(This)))++;
		}
	}

	if (!op_array->run_time_cache) {
		if (op_array->function_name) {
			op_array->run_time_cache = zend_arena_alloc(&CG(arena), op_array->cache_size);
		} else {
			op_array->run_time_cache = emalloc(op_array->cache_size);
		}
		memset(op_array->run_time_cache, 0, op_array->cache_size);
	}
	EX_LOAD_RUN_TIME_CACHE(op_array);
	EX_LOAD_LITERALS(op_array);

	EG(current_execute_data) = execute_data;
	ZEND_VM_INTERRUPT_CHECK();
}
/* }}} */

ZEND_API zend_execute_data *zend_create_generator_execute_data(zend_execute_data *call, zend_op_array *op_array, zval *return_value) /* {{{ */
{
	/*
	 * 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.
	 */
	zend_execute_data *execute_data;
	uint32_t num_args = ZEND_CALL_NUM_ARGS(call);
	size_t stack_size = (ZEND_CALL_FRAME_SLOT + MAX(op_array->last_var + op_array->T, num_args)) * sizeof(zval);
	uint32_t call_info;

	EG(vm_stack) = zend_vm_stack_new_page(
		EXPECTED(stack_size < ZEND_VM_STACK_FREE_PAGE_SIZE(1)) ?
			ZEND_VM_STACK_PAGE_SIZE(1) :
			ZEND_VM_STACK_PAGE_ALIGNED_SIZE(1, stack_size),
		NULL);
	EG(vm_stack_top) = EG(vm_stack)->top;
	EG(vm_stack_end) = EG(vm_stack)->end;

	call_info = ZEND_CALL_TOP_FUNCTION | ZEND_CALL_ALLOCATED | (ZEND_CALL_INFO(call) & (ZEND_CALL_CLOSURE|ZEND_CALL_RELEASE_THIS));
	if (Z_OBJ(call->This)) {
		call_info |= ZEND_CALL_RELEASE_THIS;
	}
	execute_data = zend_vm_stack_push_call_frame(
		call_info,
		(zend_function*)op_array,
		num_args,
		call->called_scope,
		Z_OBJ(call->This));
	EX(prev_execute_data) = NULL;
	EX_NUM_ARGS() = num_args;

	/* copy arguments */
	if (num_args > 0) {
		zval *arg_src = ZEND_CALL_ARG(call, 1);
		zval *arg_dst = ZEND_CALL_ARG(execute_data, 1);
		zval *end = arg_src + num_args;

		do {
			ZVAL_COPY_VALUE(arg_dst, arg_src);
			arg_src++;
			arg_dst++;
		} while (arg_src != end);
	}

	EX(symbol_table) = NULL;

	i_init_func_execute_data(execute_data, op_array, return_value, 1);

	return execute_data;
}
/* }}} */

ZEND_API void zend_init_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
{
	EX(prev_execute_data) = EG(current_execute_data);
	i_init_execute_data(execute_data, op_array, return_value);
}
/* }}} */

static zend_always_inline zend_bool zend_is_by_ref_func_arg_fetch(const zend_op *opline, zend_execute_data *call) /* {{{ */
{
	uint32_t arg_num = opline->extended_value & ZEND_FETCH_ARG_MASK;

	if (EXPECTED(arg_num <= MAX_ARG_FLAG_NUM)) {
		return QUICK_ARG_SHOULD_BE_SENT_BY_REF(call->func, arg_num);
	}
	return ARG_SHOULD_BE_SENT_BY_REF(call->func, arg_num);
}
/* }}} */

static zend_execute_data *zend_vm_stack_copy_call_frame(zend_execute_data *call, uint32_t passed_args, uint32_t additional_args) /* {{{ */
{
	zend_execute_data *new_call;
	int used_stack = (EG(vm_stack_top) - (zval*)call) + additional_args;

	/* copy call frame into new stack segment */
	new_call = zend_vm_stack_extend(used_stack * sizeof(zval));
	*new_call = *call;
	ZEND_SET_CALL_INFO(new_call, ZEND_CALL_INFO(new_call) | ZEND_CALL_ALLOCATED);

	if (passed_args) {
		zval *src = ZEND_CALL_ARG(call, 1);
		zval *dst = ZEND_CALL_ARG(new_call, 1);
		do {
			ZVAL_COPY_VALUE(dst, src);
			passed_args--;
			src++;
			dst++;
		} while (passed_args);
	}

	/* delete old call_frame from previous stack segment */
	EG(vm_stack)->prev->top = (zval*)call;

	/* delete previous stack segment if it becames empty */
	if (UNEXPECTED(EG(vm_stack)->prev->top == ZEND_VM_STACK_ELEMENTS(EG(vm_stack)->prev))) {
		zend_vm_stack r = EG(vm_stack)->prev;

		EG(vm_stack)->prev = r->prev;
		efree(r);
	}

	return new_call;
}
/* }}} */

static zend_always_inline void zend_vm_stack_extend_call_frame(zend_execute_data **call, uint32_t passed_args, uint32_t additional_args) /* {{{ */
{
	if (EXPECTED((uint32_t)(EG(vm_stack_end) - EG(vm_stack_top)) > additional_args)) {
		EG(vm_stack_top) += additional_args;
	} else {
		*call = zend_vm_stack_copy_call_frame(*call, passed_args, additional_args);
	}
}
/* }}} */

static zend_always_inline zend_generator *zend_get_running_generator(zend_execute_data *execute_data) /* {{{ */
{
	/* The generator object is stored in EX(return_value) */
	zend_generator *generator = (zend_generator *) EX(return_value);
	/* However control may currently be delegated to another generator.
	 * That's the one we're interested in. */
	return generator;
}
/* }}} */

static void cleanup_unfinished_calls(zend_execute_data *execute_data, uint32_t op_num) /* {{{ */
{
	if (UNEXPECTED(EX(call))) {
		zend_execute_data *call = EX(call);
		zend_op *opline = EX(func)->op_array.opcodes + op_num;
		int level;
		int do_exit;
		
		if (UNEXPECTED(opline->opcode == ZEND_INIT_FCALL ||
			opline->opcode == ZEND_INIT_FCALL_BY_NAME ||
			opline->opcode == ZEND_INIT_DYNAMIC_CALL ||
			opline->opcode == ZEND_INIT_METHOD_CALL ||
			opline->opcode == ZEND_INIT_STATIC_METHOD_CALL)) {
			ZEND_ASSERT(op_num);
			opline--;
		}

		do {
			/* If the exception was thrown during a function call there might be
			 * arguments pushed to the stack that have to be dtor'ed. */

			/* find the number of actually passed arguments */
			level = 0;
			do_exit = 0;
			do {
				switch (opline->opcode) {
					case ZEND_DO_FCALL:
					case ZEND_DO_ICALL:
					case ZEND_DO_UCALL:
					case ZEND_DO_FCALL_BY_NAME:
						level++;
						break;
					case ZEND_INIT_FCALL:
					case ZEND_INIT_FCALL_BY_NAME:
					case ZEND_INIT_NS_FCALL_BY_NAME:
					case ZEND_INIT_DYNAMIC_CALL:
					case ZEND_INIT_USER_CALL:
					case ZEND_INIT_METHOD_CALL:
					case ZEND_INIT_STATIC_METHOD_CALL:
					case ZEND_NEW:
						if (level == 0) {
							ZEND_CALL_NUM_ARGS(call) = 0;
							do_exit = 1;
						}
						level--;
						break;
					case ZEND_SEND_VAL:
					case ZEND_SEND_VAL_EX:
					case ZEND_SEND_VAR:
					case ZEND_SEND_VAR_EX:
					case ZEND_SEND_REF:
					case ZEND_SEND_VAR_NO_REF:
					case ZEND_SEND_USER:
						if (level == 0) {
							ZEND_CALL_NUM_ARGS(call) = opline->op2.num;
							do_exit = 1;
						}
						break;
					case ZEND_SEND_ARRAY:
					case ZEND_SEND_UNPACK:
						if (level == 0) {
							do_exit = 1;
						}
						break;
				}
				if (!do_exit) {
					opline--;
				}
			} while (!do_exit);
			if (call->prev_execute_data) {
				/* skip current call region */
				level = 0;
				do_exit = 0;
				do {
					switch (opline->opcode) {
						case ZEND_DO_FCALL:
						case ZEND_DO_ICALL:
						case ZEND_DO_UCALL:
						case ZEND_DO_FCALL_BY_NAME:
							level++;
							break;
						case ZEND_INIT_FCALL:
						case ZEND_INIT_FCALL_BY_NAME:
						case ZEND_INIT_NS_FCALL_BY_NAME:
						case ZEND_INIT_DYNAMIC_CALL:
						case ZEND_INIT_USER_CALL:
						case ZEND_INIT_METHOD_CALL:
						case ZEND_INIT_STATIC_METHOD_CALL:
						case ZEND_NEW:
							if (level == 0) {
								do_exit = 1;
							}
							level--;
							break;
					}
					opline--;
				} while (!do_exit);
			}

			zend_vm_stack_free_args(EX(call));

			if (ZEND_CALL_INFO(call) & ZEND_CALL_RELEASE_THIS) {
				if (ZEND_CALL_INFO(call) & ZEND_CALL_CTOR) {
					GC_REFCOUNT(Z_OBJ(call->This))--;
					if (GC_REFCOUNT(Z_OBJ(call->This)) == 1) {
						zend_object_store_ctor_failed(Z_OBJ(call->This));
					}
				}
				OBJ_RELEASE(Z_OBJ(call->This));
			}
			if (call->func->common.fn_flags & ZEND_ACC_CLOSURE) {
				zend_object_release((zend_object *) call->func->common.prototype);
			} else if (call->func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) {
				zend_string_release(call->func->common.function_name);
				zend_free_trampoline(call->func);
			}

			EX(call) = call->prev_execute_data;
			zend_vm_stack_free_call_frame(call);
			call = EX(call);
		} while (call);
	}
}
/* }}} */

static void cleanup_live_vars(zend_execute_data *execute_data, uint32_t op_num, uint32_t catch_op_num) /* {{{ */
{
	int i;

	for (i = 0; i < EX(func)->op_array.last_live_range; i++) {
		const zend_live_range *range = &EX(func)->op_array.live_range[i];
		if (range->start > op_num) {
			/* further blocks will not be relevant... */
			break;
		} else if (op_num < range->end) {
			if (!catch_op_num || catch_op_num >= range->end) {
				uint32_t kind = range->var & ZEND_LIVE_MASK;
				uint32_t var_num = range->var & ~ZEND_LIVE_MASK;
				zval *var = EX_VAR(var_num);

				if (kind == ZEND_LIVE_TMPVAR) {
					zval_ptr_dtor_nogc(var);
				} else if (kind == ZEND_LIVE_LOOP) {
					if (Z_TYPE_P(var) != IS_ARRAY && Z_FE_ITER_P(var) != (uint32_t)-1) {
						zend_hash_iterator_del(Z_FE_ITER_P(var));
					}
					zval_ptr_dtor_nogc(var);
				} else if (kind == ZEND_LIVE_ROPE) {
					zend_string **rope = (zend_string **)var;
					zend_op *last = EX(func)->op_array.opcodes + op_num;
					while ((last->opcode != ZEND_ROPE_ADD && last->opcode != ZEND_ROPE_INIT)
							|| last->result.var != var_num) {
						ZEND_ASSERT(last >= EX(func)->op_array.opcodes);
						last--;
					}
					if (last->opcode == ZEND_ROPE_INIT) {
						zend_string_release(*rope);
					} else {
						int j = last->extended_value;
						do {
							zend_string_release(rope[j]);
						} while (j--);
					}
				} else if (kind == ZEND_LIVE_SILENCE) {
					/* restore previous error_reporting value */
					if (!EG(error_reporting) && Z_LVAL_P(var) != 0) {
						EG(error_reporting) = Z_LVAL_P(var);
					}
				}
			}
		}
	}
}
/* }}} */

void zend_cleanup_unfinished_execution(zend_execute_data *execute_data, uint32_t op_num, uint32_t catch_op_num) {
	cleanup_unfinished_calls(execute_data, op_num);
	cleanup_live_vars(execute_data, op_num, catch_op_num);
}

#ifdef HAVE_GCC_GLOBAL_REGS
# if defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(i386)
#  define ZEND_VM_FP_GLOBAL_REG "%esi"
#  define ZEND_VM_IP_GLOBAL_REG "%edi"
# elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__x86_64__)
#  define ZEND_VM_FP_GLOBAL_REG "%r14"
#  define ZEND_VM_IP_GLOBAL_REG "%r15"
# elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__powerpc64__)
#  define ZEND_VM_FP_GLOBAL_REG "r28"
#  define ZEND_VM_IP_GLOBAL_REG "r29"
# elif defined(__IBMC__) && ZEND_GCC_VERSION >= 4002 && defined(__powerpc64__)
#  define ZEND_VM_FP_GLOBAL_REG "r28"
#  define ZEND_VM_IP_GLOBAL_REG "r29"
# endif
#endif

#define ZEND_VM_NEXT_OPCODE_EX(check_exception, skip) \
	CHECK_SYMBOL_TABLES() \
	if (check_exception) { \
		OPLINE = EX(opline) + (skip); \
	} else { \
		OPLINE = opline + (skip); \
	} \
	ZEND_VM_CONTINUE()

#define ZEND_VM_NEXT_OPCODE_CHECK_EXCEPTION() \
	ZEND_VM_NEXT_OPCODE_EX(1, 1)

#define ZEND_VM_NEXT_OPCODE() \
	ZEND_VM_NEXT_OPCODE_EX(0, 1)

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

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

#define ZEND_VM_SET_RELATIVE_OPCODE(opline, offset) \
	ZEND_VM_SET_OPCODE(ZEND_OFFSET_TO_OPLINE(opline, offset))

#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++


#ifndef VM_SMART_OPCODES
# define VM_SMART_OPCODES 1
#endif

#if VM_SMART_OPCODES
# define ZEND_VM_REPEATABLE_OPCODE \
	do {
# define ZEND_VM_REPEAT_OPCODE(_opcode) \
	} while (UNEXPECTED((++opline)->opcode == _opcode)); \
	OPLINE = opline; \
	ZEND_VM_CONTINUE()
# define ZEND_VM_SMART_BRANCH(_result, _check) do { \
		int __result; \
		if (EXPECTED((opline+1)->opcode == ZEND_JMPZ)) { \
			__result = (_result); \
		} else if (EXPECTED((opline+1)->opcode == ZEND_JMPNZ)) { \
			__result = !(_result); \
		} else { \
			break; \
		} \
		if ((_check) && UNEXPECTED(EG(exception))) { \
			HANDLE_EXCEPTION(); \
		} \
		if (__result) { \
			ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
		} else { \
			ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
		} \
		ZEND_VM_CONTINUE(); \
	} while (0)
# define ZEND_VM_SMART_BRANCH_JMPZ(_result, _check) do { \
		if ((_check) && UNEXPECTED(EG(exception))) { \
			HANDLE_EXCEPTION(); \
		} \
		if (_result) { \
			ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
		} else { \
			ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
		} \
		ZEND_VM_CONTINUE(); \
	} while (0)
# define ZEND_VM_SMART_BRANCH_JMPNZ(_result, _check) do { \
		if ((_check) && UNEXPECTED(EG(exception))) { \
			HANDLE_EXCEPTION(); \
		} \
		if (!(_result)) { \
			ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
		} else { \
			ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
		} \
		ZEND_VM_CONTINUE(); \
	} while (0)
#else
# define ZEND_VM_REPEATABLE_OPCODE
# define ZEND_VM_REPEAT_OPCODE(_opcode)
# define ZEND_VM_SMART_BRANCH(_result, _check)
# define ZEND_VM_SMART_BRANCH_JMPZ(_result, _check)
# define ZEND_VM_SMART_BRANCH_JMPNZ(_result, _check)
#endif

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

#define GET_OP1_UNDEF_CV(ptr, type) \
	_get_zval_cv_lookup_ ## type(ptr, opline->op1.var, execute_data)
#define GET_OP2_UNDEF_CV(ptr, type) \
	_get_zval_cv_lookup_ ## type(ptr, opline->op2.var, execute_data)

#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)
{
	return get_zval_ptr(op_type, *node, execute_data, should_free, type);
}

ZEND_API void ZEND_FASTCALL zend_check_internal_arg_type(zend_function *zf, uint32_t arg_num, zval *arg)
{
	zend_verify_internal_arg_type(zf, arg_num, arg);
}

ZEND_API int ZEND_FASTCALL zend_check_arg_type(zend_function *zf, uint32_t arg_num, zval *arg, zval *default_value, void **cache_slot)
{
	return zend_verify_arg_type(zf, arg_num, arg, default_value, cache_slot);
}

ZEND_API void ZEND_FASTCALL zend_check_missing_arg(zend_execute_data *execute_data, uint32_t arg_num, void **cache_slot)
{
	zend_verify_missing_arg(execute_data, arg_num, cache_slot);
}

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