/src/php-src/Zend/zend_execute.c

Source
/*
   +----------------------------------------------------------------------+
   | Zend Engine                                                          |
   +----------------------------------------------------------------------+
   | Copyright (c) Zend Technologies Ltd. (http://www.zend.com)           |
   +----------------------------------------------------------------------+
   | This source file is subject to version 2.00 of the Zend license,     |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.zend.com/license/2_00.txt.                                |
   | If you did not receive a copy of the Zend license and are unable to  |
   | obtain it through the world-wide-web, please send a note to          |
   | license@zend.com so we can mail you a copy immediately.              |
   +----------------------------------------------------------------------+
   | Authors: Andi Gutmans <andi@php.net>                                 |
   |          Zeev Suraski <zeev@php.net>                                 |
   |          Dmitry Stogov <dmitry@php.net>                              |
   +----------------------------------------------------------------------+
*/

#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"
#include "zend_type_info.h"
#include "zend_smart_str.h"
#include "zend_observer.h"
#include "zend_system_id.h"
#include "zend_call_stack.h"
#include "zend_attributes.h"
#include "Optimizer/zend_func_info.h"

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

#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 "r14"
#  define ZEND_VM_IP_GLOBAL_REG "r15"
# elif defined(__IBMC__) && ZEND_GCC_VERSION >= 4002 && defined(__powerpc64__)
#  define ZEND_VM_FP_GLOBAL_REG "r14"
#  define ZEND_VM_IP_GLOBAL_REG "r15"
# elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__aarch64__)
#  define ZEND_VM_FP_GLOBAL_REG "x27"
#  define ZEND_VM_IP_GLOBAL_REG "x28"
#elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__riscv) && __riscv_xlen == 64
#  define ZEND_VM_FP_GLOBAL_REG "x18"
#  define ZEND_VM_IP_GLOBAL_REG "x19"
# endif
#endif

#if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
# pragma GCC diagnostic ignored "-Wvolatile-register-var"
  register zend_execute_data* volatile execute_data __asm__(ZEND_VM_FP_GLOBAL_REG);
# pragma GCC diagnostic warning "-Wvolatile-register-var"
#endif

#if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
# define EXECUTE_DATA_D     void
# define EXECUTE_DATA_C
# define EXECUTE_DATA_DC
# define EXECUTE_DATA_CC
# define NO_EXECUTE_DATA_CC
#else
# define EXECUTE_DATA_D     zend_execute_data* execute_data
# define EXECUTE_DATA_C     execute_data
# define EXECUTE_DATA_DC    , EXECUTE_DATA_D
# define EXECUTE_DATA_CC    , EXECUTE_DATA_C
# define NO_EXECUTE_DATA_CC , NULL
#endif

#if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
# define OPLINE_D           void
# define OPLINE_C
# define OPLINE_DC
# define OPLINE_CC
#else
# define OPLINE_D           const zend_op* opline
# define OPLINE_C           opline
# define OPLINE_DC          , OPLINE_D
# define OPLINE_CC          , OPLINE_C
#endif

#if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
# pragma GCC diagnostic ignored "-Wvolatile-register-var"
  register const zend_op* volatile opline __asm__(ZEND_VM_IP_GLOBAL_REG);
# pragma GCC diagnostic warning "-Wvolatile-register-var"
#else
#endif

#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, type) _get_zval_ptr(op_type, node, type EXECUTE_DATA_CC OPLINE_CC)
#define get_zval_ptr_deref(op_type, node, type) _get_zval_ptr_deref(op_type, node, type EXECUTE_DATA_CC OPLINE_CC)
#define get_zval_ptr_undef(op_type, node, type) _get_zval_ptr_undef(op_type, node, type EXECUTE_DATA_CC OPLINE_CC)
#define get_op_data_zval_ptr_r(op_type, node) _get_op_data_zval_ptr_r(op_type, node EXECUTE_DATA_CC OPLINE_CC)
#define get_op_data_zval_ptr_deref_r(op_type, node) _get_op_data_zval_ptr_deref_r(op_type, node EXECUTE_DATA_CC OPLINE_CC)
#define get_zval_ptr_ptr(op_type, node, type) _get_zval_ptr_ptr(op_type, node, type EXECUTE_DATA_CC)
#define get_zval_ptr_ptr_undef(op_type, node, type) _get_zval_ptr_ptr(op_type, node, type EXECUTE_DATA_CC)
#define get_obj_zval_ptr(op_type, node, type) _get_obj_zval_ptr(op_type, node, type EXECUTE_DATA_CC OPLINE_CC)
#define get_obj_zval_ptr_deref(op_type, node, type) _get_obj_zval_ptr_deref(op_type, node, type EXECUTE_DATA_CC OPLINE_CC)
#define get_obj_zval_ptr_undef(op_type, node, type) _get_obj_zval_ptr_undef(op_type, node, type EXECUTE_DATA_CC OPLINE_CC)
#define get_obj_zval_ptr_ptr(op_type, node, type) _get_obj_zval_ptr_ptr(op_type, node, type EXECUTE_DATA_CC)

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

static ZEND_FUNCTION(pass)
{
}

static zend_arg_info zend_pass_function_arg_info[1] = {0};

ZEND_API 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 */
  zend_pass_function_arg_info + 1, /* arg_info */
  NULL,                   /* attributes        */
  NULL,                   /* run_time_cache    */
  NULL,                   /* doc_comment       */
  0,                      /* T                 */
  0,                      /* fn_flags2         */
  NULL,                   /* prop_info */
  ZEND_FN(pass),          /* handler           */
  NULL,                   /* module            */
  NULL,                   /* frameless_function_infos */
  {NULL,NULL,NULL,NULL}   /* reserved          */
};

#define FREE_VAR_PTR_AND_EXTRACT_RESULT_IF_NECESSARY(free_var) do {     \
  zval *__container_to_free = EX_VAR(free_var);             \
  if (UNEXPECTED(Z_REFCOUNTED_P(__container_to_free))) {         \
    zend_refcounted *__ref = Z_COUNTED_P(__container_to_free);      \
    if (UNEXPECTED(!GC_DELREF(__ref))) {               \
      zval *__zv = EX_VAR(opline->result.var);           \
      if (EXPECTED(Z_TYPE_P(__zv) == IS_INDIRECT)) {         \
        ZVAL_COPY(__zv, Z_INDIRECT_P(__zv));           \
      }                               \
      rc_dtor_func(__ref);                      \
    }                                 \
  }                                   \
} while (0)

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

#define CV_DEF_OF(i) (EX(func)->op_array.vars[i])

#define ZEND_VM_STACK_PAGE_SLOTS (16 * 1024) /* should be a power of 2 */

#define ZEND_VM_STACK_PAGE_SIZE  (ZEND_VM_STACK_PAGE_SLOTS * sizeof(zval))

#define ZEND_VM_STACK_PAGE_ALIGNED_SIZE(size, page_size) \
  (((size) + ZEND_VM_STACK_HEADER_SLOTS * sizeof(zval) \
    + ((page_size) - 1)) & ~((page_size) - 1))

ZEND_API void zend_vm_stack_init(void)
{
  EG(vm_stack_page_size) = ZEND_VM_STACK_PAGE_SIZE;
  EG(vm_stack) = zend_vm_stack_new_page(ZEND_VM_STACK_PAGE_SIZE, NULL);
  EG(vm_stack_top) = EG(vm_stack)->top;
  EG(vm_stack_end) = EG(vm_stack)->end;
}

ZEND_API void zend_vm_stack_init_ex(size_t page_size)
{
  /* page_size must be a power of 2 */
  ZEND_ASSERT(page_size > 0 && (page_size & (page_size - 1)) == 0);
  EG(vm_stack_page_size) = page_size;
  EG(vm_stack) = zend_vm_stack_new_page(page_size, NULL);
  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 < EG(vm_stack_page_size) - (ZEND_VM_STACK_HEADER_SLOTS * sizeof(zval))) ?
      EG(vm_stack_page_size) : ZEND_VM_STACK_PAGE_ALIGNED_SIZE(size, EG(vm_stack_page_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);
}

ZEND_API bool zend_gcc_global_regs(void)
{
  #if defined(HAVE_GCC_GLOBAL_REGS)
        return 1;
  #else
        return 0;
  #endif
}

static zend_always_inline zval *_get_zval_ptr_tmp(uint32_t var EXECUTE_DATA_DC)
{
  zval *ret = EX_VAR(var);

  ZEND_ASSERT(Z_TYPE_P(ret) != IS_REFERENCE);

  return ret;
}

static zend_always_inline zval *_get_zval_ptr_var(uint32_t var EXECUTE_DATA_DC)
{
  zval *ret = EX_VAR(var);

  return ret;
}

static zend_always_inline zval *_get_zval_ptr_var_deref(uint32_t var EXECUTE_DATA_DC)
{
  zval *ret = EX_VAR(var);

  ZVAL_DEREF(ret);
  return ret;
}

static zend_never_inline ZEND_COLD zval* zval_undefined_cv(uint32_t var EXECUTE_DATA_DC)
{
  if (EXPECTED(EG(exception) == NULL)) {
    zend_string *cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
    zend_error_unchecked(E_WARNING, "Undefined variable $%S", cv);
  }
  return &EG(uninitialized_zval);
}

static zend_never_inline ZEND_COLD zval* ZEND_FASTCALL _zval_undefined_op1(EXECUTE_DATA_D)
{
  return zval_undefined_cv(EX(opline)->op1.var EXECUTE_DATA_CC);
}

static zend_never_inline ZEND_COLD zval* ZEND_FASTCALL _zval_undefined_op2(EXECUTE_DATA_D)
{
  return zval_undefined_cv(EX(opline)->op2.var EXECUTE_DATA_CC);
}

#define ZVAL_UNDEFINED_OP1() _zval_undefined_op1(EXECUTE_DATA_C)
#define ZVAL_UNDEFINED_OP2() _zval_undefined_op2(EXECUTE_DATA_C)

static zend_never_inline ZEND_COLD zval *_get_zval_cv_lookup(zval *ptr, uint32_t var, int type EXECUTE_DATA_DC)
{
  switch (type) {
    case BP_VAR_R:
    case BP_VAR_UNSET:
      ptr = zval_undefined_cv(var EXECUTE_DATA_CC);
      break;
    case BP_VAR_IS:
      ptr = &EG(uninitialized_zval);
      break;
    case BP_VAR_RW:
      zval_undefined_cv(var EXECUTE_DATA_CC);
      ZEND_FALLTHROUGH;
    case BP_VAR_W:
      ZVAL_NULL(ptr);
      break;
  }
  return ptr;
}

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

  if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
    if (type == BP_VAR_W) {
      ZVAL_NULL(ret);
    } else {
      return _get_zval_cv_lookup(ret, var, type EXECUTE_DATA_CC);
    }
  }
  return ret;
}

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

  if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
    if (type == BP_VAR_W) {
      ZVAL_NULL(ret);
      return ret;
    } else {
      return _get_zval_cv_lookup(ret, var, type EXECUTE_DATA_CC);
    }
  }
  ZVAL_DEREF(ret);
  return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_R(uint32_t var EXECUTE_DATA_DC)
{
  zval *ret = EX_VAR(var);

  if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
    return zval_undefined_cv(var EXECUTE_DATA_CC);
  }
  return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_R(uint32_t var EXECUTE_DATA_DC)
{
  zval *ret = EX_VAR(var);

  if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
    return zval_undefined_cv(var EXECUTE_DATA_CC);
  }
  ZVAL_DEREF(ret);
  return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_IS(uint32_t var EXECUTE_DATA_DC)
{
  zval *ret = EX_VAR(var);

  return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_RW(uint32_t var EXECUTE_DATA_DC)
{
  zval *ret = EX_VAR(var);

  if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
    zval_undefined_cv(var EXECUTE_DATA_CC);
    ZVAL_NULL(ret);
    return ret;
  }
  return ret;
}

static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_W(uint32_t var EXECUTE_DATA_DC)
{
  zval *ret = EX_VAR(var);

  if (Z_TYPE_P(ret) == IS_UNDEF) {
    ZVAL_NULL(ret);
  }
  return ret;
}

static zend_always_inline zval *_get_zval_ptr_tmpvarcv(int op_type, znode_op node, int type EXECUTE_DATA_DC)
{
  if (op_type & (IS_TMP_VAR|IS_VAR)) {
    if (op_type == IS_TMP_VAR) {
      return _get_zval_ptr_tmp(node.var EXECUTE_DATA_CC);
    } else {
      ZEND_ASSERT(op_type == IS_VAR);
      return _get_zval_ptr_var_deref(node.var EXECUTE_DATA_CC);
    }
  } else {
    ZEND_ASSERT(op_type == IS_CV);
    return _get_zval_ptr_cv_deref(node.var, type EXECUTE_DATA_CC);
  }
}

static zend_always_inline zval *_get_zval_ptr(int op_type, znode_op node, int type EXECUTE_DATA_DC OPLINE_DC)
{
  if (op_type & (IS_TMP_VAR|IS_VAR)) {
    if (!ZEND_DEBUG || op_type == IS_VAR) {
      return _get_zval_ptr_var(node.var EXECUTE_DATA_CC);
    } else {
      ZEND_ASSERT(op_type == IS_TMP_VAR);
      return _get_zval_ptr_tmp(node.var EXECUTE_DATA_CC);
    }
  } else {
    if (op_type == IS_CONST) {
      return RT_CONSTANT(opline, node);
    } else if (op_type == IS_CV) {
      return _get_zval_ptr_cv(node.var, type EXECUTE_DATA_CC);
    } else {
      return NULL;
    }
  }
}

static zend_always_inline zval *_get_op_data_zval_ptr_r(int op_type, znode_op node EXECUTE_DATA_DC OPLINE_DC)
{
  if (op_type & (IS_TMP_VAR|IS_VAR)) {
    if (!ZEND_DEBUG || op_type == IS_VAR) {
      return _get_zval_ptr_var(node.var EXECUTE_DATA_CC);
    } else {
      ZEND_ASSERT(op_type == IS_TMP_VAR);
      return _get_zval_ptr_tmp(node.var EXECUTE_DATA_CC);
    }
  } else {
    if (op_type == IS_CONST) {
      return RT_CONSTANT(opline + 1, node);
    } else if (op_type == IS_CV) {
      return _get_zval_ptr_cv_BP_VAR_R(node.var EXECUTE_DATA_CC);
    } else {
      return NULL;
    }
  }
}

static zend_always_inline ZEND_ATTRIBUTE_UNUSED zval *_get_zval_ptr_deref(int op_type, znode_op node, int type EXECUTE_DATA_DC OPLINE_DC)
{
  if (op_type & (IS_TMP_VAR|IS_VAR)) {
    if (op_type == IS_TMP_VAR) {
      return _get_zval_ptr_tmp(node.var EXECUTE_DATA_CC);
    } else {
      ZEND_ASSERT(op_type == IS_VAR);
      return _get_zval_ptr_var_deref(node.var EXECUTE_DATA_CC);
    }
  } else {
    if (op_type == IS_CONST) {
      return RT_CONSTANT(opline, node);
    } else if (op_type == IS_CV) {
      return _get_zval_ptr_cv_deref(node.var, type EXECUTE_DATA_CC);
    } else {
      return NULL;
    }
  }
}

static zend_always_inline ZEND_ATTRIBUTE_UNUSED zval *_get_op_data_zval_ptr_deref_r(int op_type, znode_op node EXECUTE_DATA_DC OPLINE_DC)
{
  if (op_type & (IS_TMP_VAR|IS_VAR)) {
    if (op_type == IS_TMP_VAR) {
      return _get_zval_ptr_tmp(node.var EXECUTE_DATA_CC);
    } else {
      ZEND_ASSERT(op_type == IS_VAR);
      return _get_zval_ptr_var_deref(node.var EXECUTE_DATA_CC);
    }
  } else {
    if (op_type == IS_CONST) {
      return RT_CONSTANT(opline + 1, node);
    } else if (op_type == IS_CV) {
      return _get_zval_ptr_cv_deref_BP_VAR_R(node.var EXECUTE_DATA_CC);
    } else {
      return NULL;
    }
  }
}

static zend_always_inline zval *_get_zval_ptr_undef(int op_type, znode_op node, int type EXECUTE_DATA_DC OPLINE_DC)
{
  if (op_type & (IS_TMP_VAR|IS_VAR)) {
    if (!ZEND_DEBUG || op_type == IS_VAR) {
      return _get_zval_ptr_var(node.var EXECUTE_DATA_CC);
    } else {
      ZEND_ASSERT(op_type == IS_TMP_VAR);
      return _get_zval_ptr_tmp(node.var EXECUTE_DATA_CC);
    }
  } else {
    if (op_type == IS_CONST) {
      return RT_CONSTANT(opline, node);
    } else if (op_type == IS_CV) {
      return EX_VAR(node.var);
    } else {
      return NULL;
    }
  }
}

static zend_always_inline zval *_get_zval_ptr_ptr_var(uint32_t var EXECUTE_DATA_DC)
{
  zval *ret = EX_VAR(var);

  if (EXPECTED(Z_TYPE_P(ret) == IS_INDIRECT)) {
    ret = Z_INDIRECT_P(ret);
  }
  return ret;
}

static inline zval *_get_zval_ptr_ptr(int op_type, znode_op node, int type EXECUTE_DATA_DC)
{
  if (op_type == IS_CV) {
    return _get_zval_ptr_cv(node.var, type EXECUTE_DATA_CC);
  } else /* if (op_type == IS_VAR) */ {
    ZEND_ASSERT(op_type == IS_VAR);
    return _get_zval_ptr_ptr_var(node.var EXECUTE_DATA_CC);
  }
}

static inline ZEND_ATTRIBUTE_UNUSED zval *_get_obj_zval_ptr(int op_type, znode_op op, int type EXECUTE_DATA_DC OPLINE_DC)
{
  if (op_type == IS_UNUSED) {
    return &EX(This);
  }
  return get_zval_ptr(op_type, op, type);
}

static inline ZEND_ATTRIBUTE_UNUSED zval *_get_obj_zval_ptr_deref(int op_type, znode_op op, int type EXECUTE_DATA_DC OPLINE_DC)
{
  if (op_type == IS_UNUSED) {
    return &EX(This);
  }
  return get_zval_ptr_deref(op_type, op, type);
}

static inline ZEND_ATTRIBUTE_UNUSED zval *_get_obj_zval_ptr_undef(int op_type, znode_op op, int type EXECUTE_DATA_DC OPLINE_DC)
{
  if (op_type == IS_UNUSED) {
    return &EX(This);
  }
  return get_zval_ptr_undef(op_type, op, type);
}

static inline ZEND_ATTRIBUTE_UNUSED zval *_get_obj_zval_ptr_ptr(int op_type, znode_op node, int type EXECUTE_DATA_DC)
{
  if (op_type == IS_UNUSED) {
    return &EX(This);
  }
  return get_zval_ptr_ptr(op_type, node, type);
}

static inline void zend_assign_to_variable_reference(zval *variable_ptr, zval *value_ptr, zend_refcounted **garbage_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_ADDREF(ref);
  if (Z_REFCOUNTED_P(variable_ptr)) {
    *garbage_ptr = Z_COUNTED_P(variable_ptr);
  }
  ZVAL_REF(variable_ptr, ref);
}

static zend_never_inline zval* zend_assign_to_typed_property_reference(zend_property_info *prop_info, zval *prop, zval *value_ptr, zend_refcounted **garbage_ptr EXECUTE_DATA_DC)
{
  if (!zend_verify_prop_assignable_by_ref(prop_info, value_ptr, EX_USES_STRICT_TYPES())) {
    return &EG(uninitialized_zval);
  }
  if (Z_ISREF_P(prop)) {
    ZEND_REF_DEL_TYPE_SOURCE(Z_REF_P(prop), prop_info);
  }
  zend_assign_to_variable_reference(prop, value_ptr, garbage_ptr);
  ZEND_REF_ADD_TYPE_SOURCE(Z_REF_P(prop), prop_info);
  return prop;
}

static zend_never_inline ZEND_COLD zval *zend_wrong_assign_to_variable_reference(zval *variable_ptr, zval *value_ptr, zend_refcounted **garbage_ptr OPLINE_DC EXECUTE_DATA_DC)
{
  zend_error(E_NOTICE, "Only variables should be assigned by reference");
  if (UNEXPECTED(EG(exception) != NULL)) {
    return &EG(uninitialized_zval);
  }

  /* Use IS_TMP_VAR instead of IS_VAR to avoid ISREF check */
  Z_TRY_ADDREF_P(value_ptr);
  return zend_assign_to_variable_ex(variable_ptr, value_ptr, IS_TMP_VAR, EX_USES_STRICT_TYPES(), garbage_ptr);
}

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_cannot_pass_by_reference(uint32_t arg_num)
{
  const zend_execute_data *execute_data = EG(current_execute_data);
  zend_string *func_name = get_function_or_method_name(EX(call)->func);
  const char *param_name = get_function_arg_name(EX(call)->func, arg_num);

  zend_throw_error(NULL, "%s(): Argument #%d%s%s%s could not be passed by reference",
    ZSTR_VAL(func_name), arg_num, param_name ? " ($" : "", param_name ? param_name : "", param_name ? ")" : ""
  );

  zend_string_release(func_name);
}

static zend_never_inline ZEND_COLD void zend_throw_auto_init_in_prop_error(const zend_property_info *prop) {
  zend_string *type_str = zend_type_to_string(prop->type);
  zend_type_error(
    "Cannot auto-initialize an array inside property %s::$%s of type %s",
    ZSTR_VAL(prop->ce->name), zend_get_unmangled_property_name(prop->name),
    ZSTR_VAL(type_str)
  );
  zend_string_release(type_str);
}

static zend_never_inline ZEND_COLD void zend_throw_auto_init_in_ref_error(const zend_property_info *prop) {
  zend_string *type_str = zend_type_to_string(prop->type);
  zend_type_error(
    "Cannot auto-initialize an array inside a reference held by property %s::$%s of type %s",
    ZSTR_VAL(prop->ce->name), zend_get_unmangled_property_name(prop->name),
    ZSTR_VAL(type_str)
  );
  zend_string_release(type_str);
}

static zend_never_inline ZEND_COLD void zend_throw_access_uninit_prop_by_ref_error(
    const zend_property_info *prop) {
  zend_throw_error(NULL,
    "Cannot access uninitialized non-nullable property %s::$%s by reference",
    ZSTR_VAL(prop->ce->name),
    zend_get_unmangled_property_name(prop->name));
}

/* this should modify object only if it's empty */
static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_throw_non_object_error(const zval *object, zval *property OPLINE_DC EXECUTE_DATA_DC)
{
  zend_string *tmp_property_name;
  zend_string *property_name = zval_get_tmp_string(property, &tmp_property_name);

  if (opline->opcode == ZEND_PRE_INC_OBJ
   || opline->opcode == ZEND_PRE_DEC_OBJ
   || opline->opcode == ZEND_POST_INC_OBJ
   || opline->opcode == ZEND_POST_DEC_OBJ) {
    zend_throw_error(NULL,
      "Attempt to increment/decrement property \"%s\" on %s",
      ZSTR_VAL(property_name), zend_zval_value_name(object)
    );
  } else if (opline->opcode == ZEND_FETCH_OBJ_W
      || opline->opcode == ZEND_FETCH_OBJ_RW
      || opline->opcode == ZEND_FETCH_OBJ_FUNC_ARG
      || opline->opcode == ZEND_ASSIGN_OBJ_REF) {
    zend_throw_error(NULL,
      "Attempt to modify property \"%s\" on %s",
      ZSTR_VAL(property_name), zend_zval_value_name(object)
    );
  } else {
    zend_throw_error(NULL,
      "Attempt to assign property \"%s\" on %s",
      ZSTR_VAL(property_name), zend_zval_value_name(object)
    );
  }
  zend_tmp_string_release(tmp_property_name);

  if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
    ZVAL_NULL(EX_VAR(opline->result.var));
  }
}

static ZEND_COLD void zend_verify_type_error_common(
    const zend_function *zf, const zend_arg_info *arg_info, const zval *value,
    const char **fname, const char **fsep, const char **fclass,
    zend_string **need_msg, const char **given_kind)
{
  *fname = ZSTR_VAL(zf->common.function_name);
  if (zf->common.scope) {
    *fsep =  "::";
    *fclass = ZSTR_VAL(zf->common.scope->name);
  } else {
    *fsep =  "";
    *fclass = "";
  }

  *need_msg = zend_type_to_string_resolved(arg_info->type, zf->common.scope);

  if (value) {
    *given_kind = zend_zval_value_name(value);
  } else {
    *given_kind = "none";
  }
}

ZEND_API ZEND_COLD void zend_verify_arg_error(
    const zend_function *zf, const zend_arg_info *arg_info, uint32_t arg_num, const zval *value)
{
  const zend_execute_data *ptr = EG(current_execute_data)->prev_execute_data;
  const char *fname, *fsep, *fclass;
  zend_string *need_msg;
  const char *given_msg;

  zend_verify_type_error_common(
    zf, arg_info, value, &fname, &fsep, &fclass, &need_msg, &given_msg);

  ZEND_ASSERT(zf->common.type == ZEND_USER_FUNCTION
    && "Arginfo verification is not performed for internal functions");
  if (ptr && ptr->func && ZEND_USER_CODE(ptr->func->common.type)) {
    zend_argument_type_error(arg_num, "must be of type %s, %s given, called in %s on line %d",
      ZSTR_VAL(need_msg), given_msg,
      ZSTR_VAL(ptr->func->op_array.filename), ptr->opline->lineno
    );
  } else {
    zend_argument_type_error(arg_num,
      "must be of type %s, %s given", ZSTR_VAL(need_msg), given_msg);
  }

  zend_string_release(need_msg);
}

static bool zend_verify_weak_scalar_type_hint(uint32_t type_mask, zval *arg)
{
  zend_long lval;
  double dval;
  zend_string *str;
  bool bval;

  /* Type preference order: int -> float -> string -> bool */
  if (type_mask & MAY_BE_LONG) {
    /* For an int|float union type and string value,
     * determine chosen type by is_numeric_string() semantics. */
    if ((type_mask & MAY_BE_DOUBLE) && Z_TYPE_P(arg) == IS_STRING) {
      uint8_t type = is_numeric_str_function(Z_STR_P(arg), &lval, &dval);
      if (type == IS_LONG) {
        zend_string_release(Z_STR_P(arg));
        ZVAL_LONG(arg, lval);
        return true;
      }
      if (type == IS_DOUBLE) {
        zend_string_release(Z_STR_P(arg));
        ZVAL_DOUBLE(arg, dval);
        return true;
      }
    } else if (zend_parse_arg_long_weak(arg, &lval, 0)) {
      zval_ptr_dtor(arg);
      ZVAL_LONG(arg, lval);
      return true;
    } else if (UNEXPECTED(EG(exception))) {
      return false;
    }
  }
  if ((type_mask & MAY_BE_DOUBLE) && zend_parse_arg_double_weak(arg, &dval, 0)) {
    zval_ptr_dtor(arg);
    ZVAL_DOUBLE(arg, dval);
    return true;
  }
  if ((type_mask & MAY_BE_STRING) && zend_parse_arg_str_weak(arg, &str, 0)) {
    /* on success "arg" is converted to IS_STRING */
    return true;
  }
  if ((type_mask & MAY_BE_BOOL) == MAY_BE_BOOL && zend_parse_arg_bool_weak(arg, &bval, 0)) {
    zval_ptr_dtor(arg);
    ZVAL_BOOL(arg, bval);
    return true;
  }
  return false;
}

#if ZEND_DEBUG
static bool can_convert_to_string(const zval *zv) {
  /* We don't call cast_object here, because this check must be side-effect free. As this
   * is only used for a sanity check of arginfo/zpp consistency, it's okay if we accept
   * more than actually allowed here. */
  if (Z_TYPE_P(zv) == IS_OBJECT) {
    return Z_OBJ_HT_P(zv)->cast_object != zend_std_cast_object_tostring
      || Z_OBJCE_P(zv)->__tostring;
  }
  return Z_TYPE_P(zv) <= IS_STRING;
}

/* Used to sanity-check internal arginfo types without performing any actual type conversions. */
static bool zend_verify_weak_scalar_type_hint_no_sideeffect(uint32_t type_mask, const zval *arg)
{
  zend_long lval;
  double dval;
  bool bval;

  /* Pass (uint32_t)-1 as arg_num to indicate to ZPP not to emit any deprecation notice,
   * this is needed because the version with side effects also uses 0 (e.g. for typed properties) */
  if ((type_mask & MAY_BE_LONG) && zend_parse_arg_long_weak(arg, &lval, (uint32_t)-1)) {
    return true;
  }
  if ((type_mask & MAY_BE_DOUBLE) && zend_parse_arg_double_weak(arg, &dval, (uint32_t)-1)) {
    return true;
  }
  if ((type_mask & MAY_BE_STRING) && can_convert_to_string(arg)) {
    return true;
  }
  if ((type_mask & MAY_BE_BOOL) == MAY_BE_BOOL && zend_parse_arg_bool_weak(arg, &bval, (uint32_t)-1)) {
    return true;
  }
  return false;
}
#endif

ZEND_API bool zend_verify_scalar_type_hint(uint32_t type_mask, zval *arg, bool strict, bool is_internal_arg)
{
  if (UNEXPECTED(strict)) {
    /* SSTH Exception: IS_LONG may be accepted as IS_DOUBLE (converted) */
    if (!(type_mask & MAY_BE_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).
     * As an exception for internal functions, null is allowed for scalar types in weak mode. */
    return is_internal_arg
      && (type_mask & (MAY_BE_TRUE|MAY_BE_FALSE|MAY_BE_LONG|MAY_BE_DOUBLE|MAY_BE_STRING));
  }
#if ZEND_DEBUG
  if (is_internal_arg) {
    return zend_verify_weak_scalar_type_hint_no_sideeffect(type_mask, arg);
  }
#endif
  return zend_verify_weak_scalar_type_hint(type_mask, arg);
}

ZEND_COLD zend_never_inline void zend_verify_class_constant_type_error(const zend_class_constant *c, const zend_string *name, const zval *constant)
{
  zend_string *type_str = zend_type_to_string(c->type);

  zend_type_error("Cannot assign %s to class constant %s::%s of type %s",
    zend_zval_type_name(constant), ZSTR_VAL(c->ce->name), ZSTR_VAL(name), ZSTR_VAL(type_str));

  zend_string_release(type_str);
}

ZEND_COLD zend_never_inline void zend_verify_property_type_error(const zend_property_info *info, const zval *property)
{
  zend_string *type_str;

  /* we _may_ land here in case reading already errored and runtime cache thus has not been updated (i.e. it contains a valid but unrelated info) */
  if (EG(exception)) {
    return;
  }

  type_str = zend_type_to_string(info->type);
  zend_type_error("Cannot assign %s to property %s::$%s of type %s",
    zend_zval_value_name(property),
    ZSTR_VAL(info->ce->name),
    zend_get_unmangled_property_name(info->name),
    ZSTR_VAL(type_str));
  zend_string_release(type_str);
}

ZEND_COLD zend_never_inline void zend_magic_get_property_type_inconsistency_error(const zend_property_info *info, const zval *property)
{
  /* we _may_ land here in case reading already errored and runtime cache thus has not been updated (i.e. it contains a valid but unrelated info) */
  if (EG(exception)) {
    return;
  }

  zend_string *type_str = zend_type_to_string(info->type);
  zend_type_error("Value of type %s returned from %s::__get() must be compatible with unset property %s::$%s of type %s",
    zend_zval_type_name(property),
    ZSTR_VAL(info->ce->name),
    ZSTR_VAL(info->ce->name),
    zend_get_unmangled_property_name(info->name),
    ZSTR_VAL(type_str));
  zend_string_release(type_str);
}

ZEND_COLD void zend_match_unhandled_error(const zval *value)
{
  zend_long max_len = EG(exception_string_param_max_len);
  smart_str msg = {0};
  if (
    EG(exception_ignore_args)
    || (Z_TYPE_P(value) == IS_STRING && max_len == 0)
    || smart_str_append_zval(&msg, value, max_len) != SUCCESS
  ) {
    smart_str_appendl(&msg, "of type ", sizeof("of type ")-1);
    smart_str_appends(&msg, zend_zval_type_name(value));
  }
  smart_str_0(&msg);

  zend_throw_exception_ex(
    zend_ce_unhandled_match_error, 0, "Unhandled match case %s", ZSTR_VAL(msg.s));

  smart_str_free(&msg);
}

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_readonly_property_modification_error(
    const zend_property_info *info) {
  zend_readonly_property_modification_error_ex(
    ZSTR_VAL(info->ce->name), zend_get_unmangled_property_name(info->name));
}

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_readonly_property_modification_error_ex(
    const char *class_name, const char *prop_name) {
  zend_throw_error(NULL, "Cannot modify readonly property %s::$%s", class_name, prop_name);
}

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_readonly_property_indirect_modification_error(const zend_property_info *info)
{
  zend_throw_error(NULL, "Cannot indirectly modify readonly property %s::$%s",
    ZSTR_VAL(info->ce->name), zend_get_unmangled_property_name(info->name));
}

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_invalid_class_constant_type_error(const uint8_t type)
{
  zend_type_error("Cannot use value of type %s as class constant name", zend_get_type_by_const(type));
}

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_object_released_while_assigning_to_property_error(const zend_property_info *info)
{
  zend_throw_error(NULL, "Object was released while assigning to property %s::$%s",
    ZSTR_VAL(info->ce->name), zend_get_unmangled_property_name(info->name));
}

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_asymmetric_visibility_property_modification_error(
  const zend_property_info *prop_info, const char *operation
) {
  const zend_class_entry *scope;
  if (EG(fake_scope)) {
    scope = EG(fake_scope);
  } else {
    scope = zend_get_called_scope(EG(current_execute_data));
  }

  const char *visibility;
  if (prop_info->flags & ZEND_ACC_PRIVATE_SET) {
    visibility = "private(set)";
  } else {
    ZEND_ASSERT(prop_info->flags & ZEND_ACC_PROTECTED_SET);
    if (prop_info->flags & ZEND_ACC_READONLY) {
      visibility = "protected(set) readonly";
    } else {
      visibility = "protected(set)";
    }
  }

  zend_throw_error(NULL, "Cannot %s %s property %s::$%s from %s%s",
    operation,
    visibility,
    ZSTR_VAL(prop_info->ce->name),
    ZSTR_VAL(prop_info->name),
    scope ? "scope " : "global scope", scope ? ZSTR_VAL(scope->name) : "");
}

static const zend_class_entry *resolve_single_class_type(zend_string *name, const zend_class_entry *self_ce) {
  if (zend_string_equals_ci(name, ZSTR_KNOWN(ZEND_STR_SELF))) {
    return self_ce;
  } else if (zend_string_equals_ci(name, ZSTR_KNOWN(ZEND_STR_PARENT))) {
    return self_ce->parent;
  } else {
    return zend_lookup_class_ex(name, NULL, ZEND_FETCH_CLASS_NO_AUTOLOAD);
  }
}

static zend_always_inline const zend_class_entry *zend_ce_from_type(
    const zend_class_entry *scope, const zend_type *type) {
  ZEND_ASSERT(ZEND_TYPE_HAS_NAME(*type));
  zend_string *name = ZEND_TYPE_NAME(*type);
  if (ZSTR_HAS_CE_CACHE(name)) {
    zend_class_entry *ce = ZSTR_GET_CE_CACHE(name);
    if (!ce) {
      ce = zend_lookup_class_ex(name, NULL, ZEND_FETCH_CLASS_NO_AUTOLOAD);
    }
    return ce;
  }
  return resolve_single_class_type(name, scope);
}

static bool zend_check_intersection_for_property_or_class_constant_class_type(
  const zend_class_entry *scope, const zend_type_list *intersection_type_list, const zend_class_entry *value_ce)
{
  const zend_type *list_type;

  ZEND_TYPE_LIST_FOREACH(intersection_type_list, list_type) {
    ZEND_ASSERT(!ZEND_TYPE_HAS_LIST(*list_type));
    const zend_class_entry *ce = zend_ce_from_type(scope, list_type);
    if (!ce || !instanceof_function(value_ce, ce)) {
      return false;
    }
  } ZEND_TYPE_LIST_FOREACH_END();
  return true;
}

static bool zend_check_and_resolve_property_or_class_constant_class_type(
  const zend_class_entry *scope, const zend_type member_type, const zend_class_entry *value_ce) {
  if (ZEND_TYPE_HAS_LIST(member_type)) {
    if (ZEND_TYPE_IS_INTERSECTION(member_type)) {
      return zend_check_intersection_for_property_or_class_constant_class_type(
        scope, ZEND_TYPE_LIST(member_type), value_ce);
    } else {
      const zend_type *list_type;
      ZEND_TYPE_LIST_FOREACH(ZEND_TYPE_LIST(member_type), list_type) {
        if (ZEND_TYPE_IS_INTERSECTION(*list_type)) {
          if (zend_check_intersection_for_property_or_class_constant_class_type(
              scope, ZEND_TYPE_LIST(*list_type), value_ce)) {
            return true;
          }
          continue;
        }
        ZEND_ASSERT(!ZEND_TYPE_HAS_LIST(*list_type));
        const zend_class_entry *ce = zend_ce_from_type(scope, list_type);
        if (ce && instanceof_function(value_ce, ce)) {
          return true;
        }
      } ZEND_TYPE_LIST_FOREACH_END();

      if ((ZEND_TYPE_PURE_MASK(member_type) & MAY_BE_STATIC)) {
        return value_ce == scope;
      }

      return false;
    }
  } else if ((ZEND_TYPE_PURE_MASK(member_type) & MAY_BE_STATIC) && value_ce == scope) {
    return true;
  } else if (ZEND_TYPE_HAS_NAME(member_type)) {
    const zend_class_entry *ce = zend_ce_from_type(scope, &member_type);
    return ce && instanceof_function(value_ce, ce);
  }

  return false;
}

static zend_always_inline bool i_zend_check_property_type(const zend_property_info *info, zval *property, bool strict)
{
  ZEND_ASSERT(!Z_ISREF_P(property));
  if (EXPECTED(ZEND_TYPE_CONTAINS_CODE(info->type, Z_TYPE_P(property)))) {
    return 1;
  }

  if (ZEND_TYPE_IS_COMPLEX(info->type) && Z_TYPE_P(property) == IS_OBJECT
      && zend_check_and_resolve_property_or_class_constant_class_type(info->ce, info->type, Z_OBJCE_P(property))) {
    return 1;
  }

  uint32_t type_mask = ZEND_TYPE_FULL_MASK(info->type);
  ZEND_ASSERT(!(type_mask & (MAY_BE_CALLABLE|MAY_BE_STATIC|MAY_BE_NEVER|MAY_BE_VOID)));
  return zend_verify_scalar_type_hint(type_mask, property, strict, false);
}

static zend_always_inline bool i_zend_verify_property_type(const zend_property_info *info, zval *property, bool strict)
{
  if (i_zend_check_property_type(info, property, strict)) {
    return 1;
  }

  zend_verify_property_type_error(info, property);
  return 0;
}

ZEND_API bool zend_never_inline zend_verify_property_type(const zend_property_info *info, zval *property, bool strict) {
  return i_zend_verify_property_type(info, property, strict);
}

static zend_never_inline zval* zend_assign_to_typed_prop(const zend_property_info *info, zval *property_val, zval *value, zend_refcounted **garbage_ptr EXECUTE_DATA_DC)
{
  zval tmp;

  if (UNEXPECTED(info->flags & (ZEND_ACC_READONLY|ZEND_ACC_PPP_SET_MASK))) {
    if ((info->flags & ZEND_ACC_READONLY) && !(Z_PROP_FLAG_P(property_val) & IS_PROP_REINITABLE)) {
      zend_readonly_property_modification_error(info);
      return &EG(uninitialized_zval);
    }
    if (info->flags & ZEND_ACC_PPP_SET_MASK && !zend_asymmetric_property_has_set_access(info)) {
      zend_asymmetric_visibility_property_modification_error(info, "modify");
      return &EG(uninitialized_zval);
    }
  }

  ZVAL_DEREF(value);
  ZVAL_COPY(&tmp, value);

  if (UNEXPECTED(!i_zend_verify_property_type(info, &tmp, EX_USES_STRICT_TYPES()))) {
    zval_ptr_dtor(&tmp);
    return &EG(uninitialized_zval);
  }

  Z_PROP_FLAG_P(property_val) &= ~IS_PROP_REINITABLE;

  return zend_assign_to_variable_ex(property_val, &tmp, IS_TMP_VAR, EX_USES_STRICT_TYPES(), garbage_ptr);
}

static zend_always_inline bool zend_value_instanceof_static(const zval *zv) {
  if (Z_TYPE_P(zv) != IS_OBJECT) {
    return 0;
  }

  zend_class_entry *called_scope = zend_get_called_scope(EG(current_execute_data));
  if (!called_scope) {
    return 0;
  }
  return instanceof_function(Z_OBJCE_P(zv), called_scope);
}

static zend_always_inline zend_class_entry *zend_fetch_ce_from_type(
    const zend_type *type)
{
  zend_string *name = ZEND_TYPE_NAME(*type);
  zend_class_entry *ce;
  if (ZSTR_HAS_CE_CACHE(name)) {
    ce = ZSTR_GET_CE_CACHE(name);
    if (!ce) {
      ce = zend_lookup_class_ex(name, NULL, ZEND_FETCH_CLASS_NO_AUTOLOAD);
      if (UNEXPECTED(!ce)) {
        /* Cannot resolve */
        return NULL;
      }
    }
  } else {
    ce = zend_fetch_class(name,
      ZEND_FETCH_CLASS_AUTO | ZEND_FETCH_CLASS_NO_AUTOLOAD | ZEND_FETCH_CLASS_SILENT);
    if (UNEXPECTED(!ce)) {
      return NULL;
    }
  }
  return ce;
}

static bool zend_check_intersection_type_from_list(
  const zend_type_list *intersection_type_list,
  zend_class_entry *arg_ce)
{
  zend_class_entry *ce;
  const zend_type *list_type;
  ZEND_TYPE_LIST_FOREACH(intersection_type_list, list_type) {
    ce = zend_fetch_ce_from_type(list_type);
    /* If type is not an instance of one of the types taking part in the
     * intersection it cannot be a valid instance of the whole intersection type. */
    if (!ce || !instanceof_function(arg_ce, ce)) {
      return false;
    }
  } ZEND_TYPE_LIST_FOREACH_END();
  return true;
}

static zend_always_inline bool zend_check_type_slow(
    const zend_type *type, zval *arg, const zend_reference *ref,
    bool is_return_type, bool is_internal)
{
  if (ZEND_TYPE_IS_COMPLEX(*type) && EXPECTED(Z_TYPE_P(arg) == IS_OBJECT)) {
    zend_class_entry *ce;
    if (UNEXPECTED(ZEND_TYPE_HAS_LIST(*type))) {
      if (ZEND_TYPE_IS_INTERSECTION(*type)) {
        return zend_check_intersection_type_from_list(ZEND_TYPE_LIST(*type), Z_OBJCE_P(arg));
      } else {
        const zend_type *list_type;
        ZEND_TYPE_LIST_FOREACH(ZEND_TYPE_LIST(*type), list_type) {
          if (ZEND_TYPE_IS_INTERSECTION(*list_type)) {
            if (zend_check_intersection_type_from_list(ZEND_TYPE_LIST(*list_type), Z_OBJCE_P(arg))) {
              return true;
            }
          } else {
            ZEND_ASSERT(!ZEND_TYPE_HAS_LIST(*list_type));
            ce = zend_fetch_ce_from_type(list_type);
            /* Instance of a single type part of a union is sufficient to pass the type check */
            if (ce && instanceof_function(Z_OBJCE_P(arg), ce)) {
              return true;
            }
          }
        } ZEND_TYPE_LIST_FOREACH_END();
      }
    } else {
      ce = zend_fetch_ce_from_type(type);
      /* If we have a CE we check if it satisfies the type constraint,
       * otherwise it will check if a standard type satisfies it. */
      if (ce && instanceof_function(Z_OBJCE_P(arg), ce)) {
        return true;
      }
    }
  }

  const uint32_t type_mask = ZEND_TYPE_FULL_MASK(*type);
  if ((type_mask & MAY_BE_CALLABLE) &&
    zend_is_callable(arg, is_internal ? IS_CALLABLE_SUPPRESS_DEPRECATIONS : 0, NULL)) {
    return 1;
  }
  if ((type_mask & MAY_BE_STATIC) && zend_value_instanceof_static(arg)) {
    return 1;
  }
  if (ref && ZEND_REF_HAS_TYPE_SOURCES(ref)) {
    /* We cannot have conversions for typed refs. */
    return 0;
  }
  if (is_internal && is_return_type) {
    /* For internal returns, the type has to match exactly, because we're not
     * going to check it for non-debug builds, and there will be no chance to
     * apply coercions. */
    return 0;
  }

  return zend_verify_scalar_type_hint(type_mask, arg,
    is_return_type ? ZEND_RET_USES_STRICT_TYPES() : ZEND_ARG_USES_STRICT_TYPES(),
    is_internal);

  /* Special handling for IS_VOID is not necessary (for return types),
   * because this case is already checked at compile-time. */
}

static zend_always_inline bool zend_check_type(
    const zend_type *type, zval *arg, bool is_return_type, bool is_internal)
{
  const zend_reference *ref = NULL;
  ZEND_ASSERT(ZEND_TYPE_IS_SET(*type));

  if (UNEXPECTED(Z_ISREF_P(arg))) {
    ref = Z_REF_P(arg);
    arg = Z_REFVAL_P(arg);
  }

  if (EXPECTED(ZEND_TYPE_CONTAINS_CODE(*type, Z_TYPE_P(arg)))) {
    return 1;
  }

  return zend_check_type_slow(type, arg, ref, is_return_type, is_internal);
}

ZEND_API bool zend_check_user_type_slow(
    const zend_type *type, zval *arg, const zend_reference *ref, bool is_return_type)
{
  return zend_check_type_slow(
    type, arg, ref, is_return_type, /* is_internal */ false);
}

static zend_always_inline bool zend_verify_recv_arg_type(const zend_function *zf, uint32_t arg_num, zval *arg)
{
  const zend_arg_info *cur_arg_info;

  ZEND_ASSERT(arg_num <= zf->common.num_args);
  cur_arg_info = &zf->common.arg_info[arg_num-1];

  if (ZEND_TYPE_IS_SET(cur_arg_info->type)
      && UNEXPECTED(!zend_check_type(&cur_arg_info->type, arg, false, false))) {
    zend_verify_arg_error(zf, cur_arg_info, arg_num, arg);
    return 0;
  }

  return 1;
}

static zend_always_inline bool zend_verify_variadic_arg_type(
    const zend_function *zf, const zend_arg_info *arg_info, uint32_t arg_num, zval *arg)
{
  ZEND_ASSERT(ZEND_TYPE_IS_SET(arg_info->type));
  if (UNEXPECTED(!zend_check_type(&arg_info->type, arg, false, false))) {
    zend_verify_arg_error(zf, arg_info, arg_num, arg);
    return 0;
  }

  return 1;
}

static zend_never_inline ZEND_ATTRIBUTE_UNUSED bool zend_verify_internal_arg_types(const zend_function *fbc, zend_execute_data *call)
{
  uint32_t i;
  uint32_t num_args = ZEND_CALL_NUM_ARGS(call);
  zval *arg = ZEND_CALL_ARG(call, 1);

  for (i = 0; i < num_args; ++i) {
    zend_arg_info *cur_arg_info;
    if (EXPECTED(i < fbc->common.num_args)) {
      cur_arg_info = &fbc->common.arg_info[i];
    } else if (UNEXPECTED(fbc->common.fn_flags & ZEND_ACC_VARIADIC)) {
      cur_arg_info = &fbc->common.arg_info[fbc->common.num_args];
    } else {
      break;
    }

    if (ZEND_TYPE_IS_SET(cur_arg_info->type)
        && UNEXPECTED(!zend_check_type(&cur_arg_info->type, arg, false, /* is_internal */ true))) {
      return 0;
    }
    arg++;
  }
  return 1;
}

#if ZEND_DEBUG
/* Determine whether an internal call should throw, because the passed arguments violate
 * an arginfo constraint. This is only checked in debug builds. In release builds, we
 * trust that arginfo matches what is enforced by zend_parse_parameters. */
ZEND_API bool zend_internal_call_should_throw(const zend_function *fbc, zend_execute_data *call)
{
  if (fbc->internal_function.handler == ZEND_FN(pass) || (fbc->internal_function.fn_flags & ZEND_ACC_FAKE_CLOSURE)) {
    /* Be lenient about the special pass function and about fake closures. */
    return 0;
  }

  if (fbc->common.required_num_args > ZEND_CALL_NUM_ARGS(call)) {
    /* Required argument not passed. */
    return 1;
  }

  if (fbc->common.num_args < ZEND_CALL_NUM_ARGS(call)
      && !(fbc->common.fn_flags & ZEND_ACC_VARIADIC)) {
    /* Too many arguments passed. For internal functions (unlike userland functions),
     * this should always throw. */
    return 1;
  }

  if ((fbc->common.fn_flags & ZEND_ACC_HAS_TYPE_HINTS) &&
      !zend_verify_internal_arg_types(fbc, call)) {
    zend_clear_exception();
    return 1;
  }

  return 0;
}

ZEND_API ZEND_COLD void zend_internal_call_arginfo_violation(const zend_function *fbc)
{
  zend_error_noreturn(E_ERROR, "Arginfo / zpp mismatch during call of %s%s%s()",
    fbc->common.scope ? ZSTR_VAL(fbc->common.scope->name) : "",
    fbc->common.scope ? "::" : "",
    ZSTR_VAL(fbc->common.function_name));
}

#ifndef ZEND_VERIFY_FUNC_INFO
# define ZEND_VERIFY_FUNC_INFO 0
#endif

static void zend_verify_internal_func_info(const zend_function *fn, const zval *retval) {
#if ZEND_VERIFY_FUNC_INFO
  zend_string *name = fn->common.function_name;
  const uint32_t type_mask = zend_get_internal_func_info(fn, NULL, NULL);
  if (!type_mask) {
    return;
  }

  /* Always check refcount of arrays, as immutable arrays are RCN. */
  if (Z_REFCOUNTED_P(retval) || Z_TYPE_P(retval) == IS_ARRAY) {
    if (!(type_mask & MAY_BE_RC1)) {
      zend_error_noreturn(E_CORE_ERROR, "%s() missing rc1", ZSTR_VAL(name));
    }
    if (Z_REFCOUNT_P(retval) > 1 && !(type_mask & MAY_BE_RCN)) {
      zend_error_noreturn(E_CORE_ERROR, "%s() missing rcn", ZSTR_VAL(name));
    }
  }

  const uint32_t type = 1u << Z_TYPE_P(retval);
  if (!(type_mask & type)) {
    zend_error_noreturn(E_CORE_ERROR, "%s() missing type %s",
      ZSTR_VAL(name), zend_get_type_by_const(Z_TYPE_P(retval)));
  }

  if (Z_TYPE_P(retval) == IS_ARRAY) {
    const HashTable *ht = Z_ARRVAL_P(retval);
    uint32_t num_checked = 0;
    zend_string *str;
    zval *val;
    ZEND_HASH_FOREACH_STR_KEY_VAL(ht, str, val) {
      if (str) {
        if (!(type_mask & MAY_BE_ARRAY_KEY_STRING)) {
          zend_error_noreturn(E_CORE_ERROR,
            "%s() missing array_key_string", ZSTR_VAL(name));
        }
      } else {
        if (!(type_mask & MAY_BE_ARRAY_KEY_LONG)) {
          zend_error_noreturn(E_CORE_ERROR,
            "%s() missing array_key_long", ZSTR_VAL(name));
        }
      }

      const uint32_t array_type = 1u << (Z_TYPE_P(val) + MAY_BE_ARRAY_SHIFT);
      if (!(type_mask & array_type)) {
        zend_error_noreturn(E_CORE_ERROR,
          "%s() missing array element type %s",
          ZSTR_VAL(name), zend_get_type_by_const(Z_TYPE_P(retval)));
      }

      /* Don't check all elements of large arrays. */
      if (++num_checked > 16) {
        break;
      }
    } ZEND_HASH_FOREACH_END();
  }
#endif
}
#endif

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_missing_arg_error(const zend_execute_data *execute_data)
{
  const zend_execute_data *ptr = EX(prev_execute_data);

  if (ptr && ptr->func && ZEND_USER_CODE(ptr->func->common.type)) {
    zend_throw_error(zend_ce_argument_count_error, "Too few arguments to function %s%s%s(), %d passed in %s on line %d and %s %d expected",
      EX(func)->common.scope ? ZSTR_VAL(EX(func)->common.scope->name) : "",
      EX(func)->common.scope ? "::" : "",
      ZSTR_VAL(EX(func)->common.function_name),
      EX_NUM_ARGS(),
      ZSTR_VAL(ptr->func->op_array.filename),
      ptr->opline->lineno,
      EX(func)->common.required_num_args == EX(func)->common.num_args ? "exactly" : "at least",
      EX(func)->common.required_num_args);
  } else {
    zend_throw_error(zend_ce_argument_count_error, "Too few arguments to function %s%s%s(), %d passed and %s %d expected",
      EX(func)->common.scope ? ZSTR_VAL(EX(func)->common.scope->name) : "",
      EX(func)->common.scope ? "::" : "",
      ZSTR_VAL(EX(func)->common.function_name),
      EX_NUM_ARGS(),
      EX(func)->common.required_num_args == EX(func)->common.num_args ? "exactly" : "at least",
      EX(func)->common.required_num_args);
  }
}

ZEND_API ZEND_COLD void zend_verify_return_error(const zend_function *zf, const zval *value)
{
  const zend_arg_info *arg_info = &zf->common.arg_info[-1];
  const char *fname, *fsep, *fclass;
  zend_string *need_msg;
  const char *given_msg;

  zend_verify_type_error_common(
    zf, arg_info, value, &fname, &fsep, &fclass, &need_msg, &given_msg);

  zend_type_error("%s%s%s(): Return value must be of type %s, %s returned",
    fclass, fsep, fname, ZSTR_VAL(need_msg), given_msg);

  zend_string_release(need_msg);
}

ZEND_API ZEND_COLD void zend_verify_never_error(const zend_function *zf)
{
  zend_string *func_name = get_function_or_method_name(zf);

  zend_type_error("%s(): never-returning %s must not implicitly return",
    ZSTR_VAL(func_name), zf->common.scope ? "method" : "function");

  zend_string_release(func_name);
}

#if ZEND_DEBUG
static ZEND_COLD void zend_verify_internal_return_error(const zend_function *zf, const zval *value)
{
  const zend_arg_info *arg_info = &zf->common.arg_info[-1];
  const char *fname, *fsep, *fclass;
  zend_string *need_msg;
  const char *given_msg;

  zend_verify_type_error_common(
    zf, arg_info, value, &fname, &fsep, &fclass, &need_msg, &given_msg);

  zend_error_noreturn(E_CORE_ERROR, "%s%s%s(): Return value must be of type %s, %s returned",
    fclass, fsep, fname, ZSTR_VAL(need_msg), given_msg);
}

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);
}

ZEND_API bool zend_verify_internal_return_type(const zend_function *zf, zval *ret)
{
  const zend_arg_info *ret_info = zf->internal_function.arg_info - 1;

  if (ZEND_TYPE_FULL_MASK(ret_info->type) & MAY_BE_VOID) {
    if (UNEXPECTED(Z_TYPE_P(ret) != IS_NULL)) {
      zend_verify_void_return_error(zf, zend_zval_value_name(ret), "");
      return 0;
    }
    return 1;
  }

  if (UNEXPECTED(!zend_check_type(&ret_info->type, ret, true, /* is_internal */ true))) {
    zend_verify_internal_return_error(zf, ret);
    return 0;
  }

  return 1;
}
#endif

static ZEND_COLD void zend_verify_missing_return_type(const zend_function *zf)
{
  /* VERIFY_RETURN_TYPE is not emitted for "void" functions, so this is always an error. */
  zend_verify_return_error(zf, NULL);
}

static zend_always_inline bool zend_check_class_constant_type(const zend_class_constant *c, zval *constant)
{
  ZEND_ASSERT(!Z_ISREF_P(constant));
  if (EXPECTED(ZEND_TYPE_CONTAINS_CODE(c->type, Z_TYPE_P(constant)))) {
    return 1;
  }

  if (((ZEND_TYPE_PURE_MASK(c->type) & MAY_BE_STATIC) || ZEND_TYPE_IS_COMPLEX(c->type)) && Z_TYPE_P(constant) == IS_OBJECT
    && zend_check_and_resolve_property_or_class_constant_class_type(c->ce, c->type, Z_OBJCE_P(constant))) {
    return 1;
  }

  uint32_t type_mask = ZEND_TYPE_FULL_MASK(c->type);
  ZEND_ASSERT(!(type_mask & (MAY_BE_CALLABLE|MAY_BE_NEVER|MAY_BE_VOID)));
  return zend_verify_scalar_type_hint(type_mask, constant, true, false);
}

ZEND_API bool zend_never_inline zend_verify_class_constant_type(const zend_class_constant *c, const zend_string *name, zval *constant)
{
  if (!zend_check_class_constant_type(c, constant)) {
    zend_verify_class_constant_type_error(c, name, constant);
    return 0;
  }

  return 1;
}

static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_use_object_as_array(const zend_object *object)
{
  zend_throw_error(NULL, "Cannot use object of type %s as array", ZSTR_VAL(object->ce->name));
}

static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_illegal_array_offset_access(const zval *offset)
{
  zend_illegal_container_offset(ZSTR_KNOWN(ZEND_STR_ARRAY), offset, BP_VAR_RW);
}

static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_illegal_array_offset_isset(const zval *offset)
{
  zend_illegal_container_offset(ZSTR_KNOWN(ZEND_STR_ARRAY), offset, BP_VAR_IS);
}

static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_illegal_array_offset_unset(const zval *offset)
{
  zend_illegal_container_offset(ZSTR_KNOWN(ZEND_STR_ARRAY), offset, BP_VAR_UNSET);
}

static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_illegal_string_offset(const zval *offset, int type)
{
  zend_illegal_container_offset(ZSTR_KNOWN(ZEND_STR_STRING), offset, type);
}

static zend_never_inline void zend_assign_to_object_dim(zend_object *obj, zval *dim, zval *value OPLINE_DC EXECUTE_DATA_DC)
{
  obj->handlers->write_dimension(obj, dim, value);

  if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
    ZVAL_COPY(EX_VAR(opline->result.var), value);
  }
}

static void frameless_observed_call_copy(zend_execute_data *call, uint32_t arg, zval *zv)
{
  if (Z_ISUNDEF_P(zv)) {
    ZVAL_NULL(ZEND_CALL_VAR_NUM(call, arg));
  } else {
    ZVAL_COPY_DEREF(ZEND_CALL_VAR_NUM(call, arg), zv);
  }
}

ZEND_API void zend_frameless_observed_call(zend_execute_data *execute_data)
{
  const zend_op *opline = EX(opline);
  uint8_t num_args = ZEND_FLF_NUM_ARGS(opline->opcode);
  zend_function *fbc = ZEND_FLF_FUNC(opline);
  zval *result = EX_VAR(opline->result.var);

  zend_execute_data *call = zend_vm_stack_push_call_frame_ex(zend_vm_calc_used_stack(num_args, fbc), ZEND_CALL_NESTED_FUNCTION, fbc, num_args, NULL);
  call->prev_execute_data = execute_data;

  switch (num_args) {
    case 3: frameless_observed_call_copy(call, 2, zend_get_zval_ptr(opline+1, (opline+1)->op1_type, &(opline+1)->op1, execute_data)); ZEND_FALLTHROUGH;
    case 2: frameless_observed_call_copy(call, 1, zend_get_zval_ptr(opline, opline->op2_type, &opline->op2, execute_data)); ZEND_FALLTHROUGH;
    case 1: frameless_observed_call_copy(call, 0, zend_get_zval_ptr(opline, opline->op1_type, &opline->op1, execute_data));
  }

  EG(current_execute_data) = call;

  zend_observer_fcall_begin_prechecked(call, ZEND_OBSERVER_DATA(fbc));
  fbc->internal_function.handler(call, result);
  zend_observer_fcall_end(call, result);

  EG(current_execute_data) = execute_data;

  if (UNEXPECTED(EG(exception) != NULL)) {
    zend_rethrow_exception(execute_data);
  }

  zend_vm_stack_free_args(call);

  uint32_t call_info = ZEND_CALL_INFO(call);
  if (UNEXPECTED(call_info & ZEND_CALL_ALLOCATED)) {
    zend_vm_stack_free_call_frame_ex(call_info, call);
  } else {
    EG(vm_stack_top) = (zval*)call;
  }
}


static zend_always_inline int zend_binary_op(zval *ret, zval *op1, zval *op2 OPLINE_DC)
{
  static const binary_op_type zend_binary_ops[] = {
    add_function,
    sub_function,
    mul_function,
    div_function,
    mod_function,
    shift_left_function,
    shift_right_function,
    concat_function,
    bitwise_or_function,
    bitwise_and_function,
    bitwise_xor_function,
    pow_function
  };
  /* size_t cast makes GCC to better optimize 64-bit PIC code */
  size_t opcode = (size_t)opline->extended_value;

  return zend_binary_ops[opcode - ZEND_ADD](ret, op1, op2);
}

static zend_never_inline void zend_binary_assign_op_obj_dim(zend_object *obj, zval *property OPLINE_DC EXECUTE_DATA_DC)
{
  zval *value;
  zval *z;
  zval rv, res;

  GC_ADDREF(obj);
  if (property && UNEXPECTED(Z_ISUNDEF_P(property))) {
    property = ZVAL_UNDEFINED_OP2();
  }
  value = get_op_data_zval_ptr_r((opline+1)->op1_type, (opline+1)->op1);
  if ((z = obj->handlers->read_dimension(obj, property, BP_VAR_R, &rv)) != NULL) {

    if (zend_binary_op(&res, z, value OPLINE_CC) == SUCCESS) {
      obj->handlers->write_dimension(obj, property, &res);
    }
    if (z == &rv) {
      zval_ptr_dtor(&rv);
    }
    if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
      ZVAL_COPY(EX_VAR(opline->result.var), &res);
    }
    zval_ptr_dtor(&res);
  } else {
    zend_use_object_as_array(obj);
    if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
      ZVAL_NULL(EX_VAR(opline->result.var));
    }
  }
  FREE_OP((opline+1)->op1_type, (opline+1)->op1.var);
  if (UNEXPECTED(GC_DELREF(obj) == 0)) {
    zend_objects_store_del(obj);
  }
}

static zend_never_inline void zend_binary_assign_op_typed_ref(zend_reference *ref, zval *value OPLINE_DC EXECUTE_DATA_DC)
{
  zval z_copy;

  /* Make sure that in-place concatenation is used if the LHS is a string. */
  if (opline->extended_value == ZEND_CONCAT && Z_TYPE(ref->val) == IS_STRING) {
    concat_function(&ref->val, &ref->val, value);
    ZEND_ASSERT(Z_TYPE(ref->val) == IS_STRING && "Concat should return string");
    return;
  }

  zend_binary_op(&z_copy, &ref->val, value OPLINE_CC);
  if (EXPECTED(zend_verify_ref_assignable_zval(ref, &z_copy, EX_USES_STRICT_TYPES()))) {
    zval_ptr_dtor(&ref->val);
    ZVAL_COPY_VALUE(&ref->val, &z_copy);
  } else {
    zval_ptr_dtor(&z_copy);
  }
}

static zend_never_inline void zend_binary_assign_op_typed_prop(const zend_property_info *prop_info, zval *zptr, zval *value OPLINE_DC EXECUTE_DATA_DC)
{
  zval z_copy;

  /* Make sure that in-place concatenation is used if the LHS is a string. */
  if (opline->extended_value == ZEND_CONCAT && Z_TYPE_P(zptr) == IS_STRING) {
    concat_function(zptr, zptr, value);
    ZEND_ASSERT(Z_TYPE_P(zptr) == IS_STRING && "Concat should return string");
    return;
  }

  zend_binary_op(&z_copy, zptr, value OPLINE_CC);
  if (EXPECTED(zend_verify_property_type(prop_info, &z_copy, EX_USES_STRICT_TYPES()))) {
    zval_ptr_dtor(zptr);
    ZVAL_COPY_VALUE(zptr, &z_copy);
  } else {
    zval_ptr_dtor(&z_copy);
  }
}

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

try_again:
  switch(Z_TYPE_P(dim)) {
    case IS_LONG:
      return Z_LVAL_P(dim);
    case IS_STRING:
    {
      bool trailing_data = false;
      /* For BC reasons we allow errors so that we can warn on leading numeric string */
      if (IS_LONG == is_numeric_string_ex(Z_STRVAL_P(dim), Z_STRLEN_P(dim), &offset, NULL,
          /* allow errors */ true, NULL, &trailing_data)) {
        if (UNEXPECTED(trailing_data) && type != BP_VAR_UNSET) {
          zend_error(E_WARNING, "Illegal string offset \"%s\"", Z_STRVAL_P(dim));
        }
        return offset;
      }
      zend_illegal_string_offset(dim, type);
      return 0;
    }
    case IS_DOUBLE:
      /* Suppress potential double warning */
      zend_error(E_WARNING, "String offset cast occurred");
      return zend_dval_to_lval_silent(Z_DVAL_P(dim));
    case IS_UNDEF:
      ZVAL_UNDEFINED_OP2();
      ZEND_FALLTHROUGH;
    case IS_NULL:
    case IS_FALSE:
    case IS_TRUE:
      zend_error(E_WARNING, "String offset cast occurred");
      break;
    case IS_REFERENCE:
      dim = Z_REFVAL_P(dim);
      goto try_again;
    default:
      zend_illegal_string_offset(dim, type);
      return 0;
  }

  return zval_get_long_func(dim, /* is_strict */ false);
}

ZEND_API ZEND_COLD void zend_wrong_string_offset_error(void)
{
  const char *msg = NULL;
  const zend_execute_data *execute_data = EG(current_execute_data);
  const zend_op *opline = execute_data->opline;

  if (UNEXPECTED(EG(exception) != NULL)) {
    return;
  }

  switch (opline->opcode) {
    case ZEND_ASSIGN_DIM_OP:
      msg = "Cannot use assign-op operators with string offsets";
      break;
    case ZEND_FETCH_LIST_W:
      msg = "Cannot create references to/from string offsets";
      break;
    case ZEND_FETCH_DIM_W:
    case ZEND_FETCH_DIM_RW:
    case ZEND_FETCH_DIM_FUNC_ARG:
    case ZEND_FETCH_DIM_UNSET:
      switch (opline->extended_value) {
        case ZEND_FETCH_DIM_REF:
          msg = "Cannot create references to/from string offsets";
          break;
        case ZEND_FETCH_DIM_DIM:
          msg = "Cannot use string offset as an array";
          break;
        case ZEND_FETCH_DIM_OBJ:
          msg = "Cannot use string offset as an object";
          break;
        case ZEND_FETCH_DIM_INCDEC:
          msg = "Cannot increment/decrement string offsets";
          break;
        EMPTY_SWITCH_DEFAULT_CASE();
      }
      break;
    EMPTY_SWITCH_DEFAULT_CASE();
  }
  ZEND_ASSERT(msg != NULL);
  zend_throw_error(NULL, "%s", msg);
}

ZEND_COLD static zend_result ZEND_FASTCALL get_deprecation_suffix_from_attribute(HashTable *attributes, zend_class_entry* scope, zend_string **message_suffix)
{
  *message_suffix = ZSTR_EMPTY_ALLOC();

  if (!attributes) {
    return SUCCESS;
  }

  zend_attribute *deprecated = zend_get_attribute_str(attributes, "deprecated", sizeof("deprecated")-1);

  if (!deprecated) {
    return SUCCESS;
  }

  if (deprecated->argc == 0) {
    return SUCCESS;
  }

  zend_result result = FAILURE;

  zend_string *message = ZSTR_EMPTY_ALLOC();
  zend_string *since = ZSTR_EMPTY_ALLOC();

  zval obj;
  ZVAL_UNDEF(&obj);
  zval *z;

  /* Construct the Deprecated object to correctly handle parameter processing. */
  if (FAILURE == zend_get_attribute_object(&obj, zend_ce_deprecated, deprecated, scope, NULL)) {
    goto out;
  }

  /* Extract the $message property. */
  z = zend_read_property_ex(zend_ce_deprecated, Z_OBJ_P(&obj), ZSTR_KNOWN(ZEND_STR_MESSAGE), false, NULL);
  ZEND_ASSERT(z != &EG(uninitialized_zval));
  if (Z_TYPE_P(z) == IS_STRING) {
    message = Z_STR_P(z);
  }

  /* Extract the $since property. */
  z = zend_read_property_ex(zend_ce_deprecated, Z_OBJ_P(&obj), ZSTR_KNOWN(ZEND_STR_SINCE), false, NULL);
  ZEND_ASSERT(z != &EG(uninitialized_zval));
  if (Z_TYPE_P(z) == IS_STRING) {
    since = Z_STR_P(z);
  }

  /* Construct the suffix. */
  *message_suffix = zend_strpprintf_unchecked(
    0,
    "%s%S%s%S",
    ZSTR_LEN(since) > 0 ? " since " : "",
    since,
    ZSTR_LEN(message) > 0 ? ", " : "",
    message
  );

  result = SUCCESS;

 out:

  zval_ptr_dtor(&obj);

  return result;
}

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_deprecated_function(const zend_function *fbc)
{
  zend_string *message_suffix = ZSTR_EMPTY_ALLOC();

  if (get_deprecation_suffix_from_attribute(fbc->common.attributes, fbc->common.scope, &message_suffix) == FAILURE) {
    return;
  }

  int code = fbc->type == ZEND_INTERNAL_FUNCTION ? E_DEPRECATED : E_USER_DEPRECATED;

  if (fbc->common.scope) {
    zend_error_unchecked(code, "Method %s::%s() is deprecated%S",
      ZSTR_VAL(fbc->common.scope->name),
      ZSTR_VAL(fbc->common.function_name),
      message_suffix
    );
  } else {
    zend_error_unchecked(code, "Function %s() is deprecated%S",
      ZSTR_VAL(fbc->common.function_name),
      message_suffix
    );
  }

  zend_string_release(message_suffix);
}

ZEND_COLD static zend_result ZEND_FASTCALL get_nodiscard_suffix_from_attribute(HashTable *attributes, zend_class_entry* scope, zend_string **message_suffix)
{
  *message_suffix = ZSTR_EMPTY_ALLOC();

  if (!attributes) {
    return SUCCESS;
  }

  zend_attribute *nodiscard = zend_get_attribute_str(attributes, "nodiscard", sizeof("nodiscard")-1);

  if (!nodiscard) {
    return SUCCESS;
  }

  if (nodiscard->argc == 0) {
    return SUCCESS;
  }

  zend_result result = FAILURE;

  zend_string *message = ZSTR_EMPTY_ALLOC();

  zval obj;
  ZVAL_UNDEF(&obj);
  zval *z;

  /* Construct the NoDiscard object to correctly handle parameter processing. */
  if (FAILURE == zend_get_attribute_object(&obj, zend_ce_nodiscard, nodiscard, scope, NULL)) {
    goto out;
  }

  /* Extract the $message property. */
  z = zend_read_property_ex(zend_ce_nodiscard, Z_OBJ_P(&obj), ZSTR_KNOWN(ZEND_STR_MESSAGE), false, NULL);
  ZEND_ASSERT(z != &EG(uninitialized_zval));
  if (Z_TYPE_P(z) == IS_STRING) {
    message = Z_STR_P(z);
  }

  /* Construct the suffix. */
  *message_suffix = zend_strpprintf_unchecked(
    0,
    "%s%S",
    ZSTR_LEN(message) > 0 ? ", " : "",
    message
  );

  result = SUCCESS;

 out:

  zval_ptr_dtor(&obj);

  return result;
}

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_nodiscard_function(const zend_function *fbc)
{
  zend_string *message_suffix = ZSTR_EMPTY_ALLOC();

  if (get_nodiscard_suffix_from_attribute(fbc->common.attributes, fbc->common.scope, &message_suffix) == FAILURE) {
    return;
  }

  int code = fbc->type == ZEND_INTERNAL_FUNCTION ? E_WARNING : E_USER_WARNING;

  if (fbc->common.scope) {
    zend_error_unchecked(code, "The return value of method %s::%s() should either be used or intentionally ignored by casting it as (void)%S",
      ZSTR_VAL(fbc->common.scope->name),
      ZSTR_VAL(fbc->common.function_name),
      message_suffix
    );
  } else {
    zend_error_unchecked(code, "The return value of function %s() should either be used or intentionally ignored by casting it as (void)%S",
      ZSTR_VAL(fbc->common.function_name),
      message_suffix
    );
  }

  zend_string_release(message_suffix);
}

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_deprecated_class_constant(const zend_class_constant *c, const zend_string *constant_name)
{
  zend_string *message_suffix = ZSTR_EMPTY_ALLOC();

  if (get_deprecation_suffix_from_attribute(c->attributes, c->ce, &message_suffix) == FAILURE) {
    return;
  }

  int code = c->ce->type == ZEND_INTERNAL_CLASS ? E_DEPRECATED : E_USER_DEPRECATED;
  char *type = (ZEND_CLASS_CONST_FLAGS(c) & ZEND_CLASS_CONST_IS_CASE) ? "Enum case" : "Constant";

  zend_error_unchecked(code, "%s %s::%s is deprecated%S",
    type,
    ZSTR_VAL(c->ce->name),
    ZSTR_VAL(constant_name),
    message_suffix
  );

  zend_string_release(message_suffix);
}

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_deprecated_constant(const zend_constant *c, const zend_string *constant_name)
{
  zend_string *message_suffix = ZSTR_EMPTY_ALLOC();

  if (get_deprecation_suffix_from_attribute(c->attributes, NULL, &message_suffix) == FAILURE) {
    return;
  }

  int code = ZEND_CONSTANT_MODULE_NUMBER(c) == PHP_USER_CONSTANT ? E_USER_DEPRECATED : E_DEPRECATED;

  zend_error_unchecked(code, "Constant %s is deprecated%S",
    ZSTR_VAL(constant_name),
    message_suffix
  );

  zend_string_release(message_suffix);
}

ZEND_API ZEND_COLD void zend_use_of_deprecated_trait(
  zend_class_entry *trait,
  const zend_string *used_by
) {
  zend_string *message_suffix = ZSTR_EMPTY_ALLOC();

  if (get_deprecation_suffix_from_attribute(trait->attributes, trait, &message_suffix) == FAILURE) {
    return;
  }

  int code = trait->type == ZEND_INTERNAL_CLASS ? E_DEPRECATED : E_USER_DEPRECATED;

  zend_error_unchecked(code, "Trait %s used by %s is deprecated%S",
    ZSTR_VAL(trait->name),
    ZSTR_VAL(used_by),
    message_suffix
  );

  zend_string_release(message_suffix);
}

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_false_to_array_deprecated(void)
{
  zend_error(E_DEPRECATED, "Automatic conversion of false to array is deprecated");
}

static zend_never_inline void zend_assign_to_string_offset(zval *str, zval *dim, zval *value OPLINE_DC EXECUTE_DATA_DC)
{
  zend_uchar c;
  size_t string_len;
  zend_long offset;
  zend_string *s;

  /* separate string */
  if (Z_REFCOUNTED_P(str) && Z_REFCOUNT_P(str) == 1) {
    s = Z_STR_P(str);
  } else {
    s = zend_string_init(Z_STRVAL_P(str), Z_STRLEN_P(str), 0);
    ZSTR_H(s) = ZSTR_H(Z_STR_P(str));
    if (Z_REFCOUNTED_P(str)) {
      GC_DELREF(Z_STR_P(str));
    }
    ZVAL_NEW_STR(str, s);
  }

  if (EXPECTED(Z_TYPE_P(dim) == IS_LONG)) {
    offset = Z_LVAL_P(dim);
  } else {
    /* The string may be destroyed while throwing the notice.
     * Temporarily increase the refcount to detect this situation. */
    GC_ADDREF(s);
    offset = zend_check_string_offset(dim, BP_VAR_W EXECUTE_DATA_CC);
    if (UNEXPECTED(GC_DELREF(s) == 0)) {
      zend_string_efree(s);
      if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
        ZVAL_NULL(EX_VAR(opline->result.var));
      }
      return;
    }
    /* Illegal offset assignment */
    if (UNEXPECTED(EG(exception) != NULL)) {
      if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
        ZVAL_UNDEF(EX_VAR(opline->result.var));
      }
      return;
    }
  }

  if (UNEXPECTED(offset < -(zend_long)ZSTR_LEN(s))) {
    /* Error on negative offset */
    zend_error(E_WARNING, "Illegal string offset " ZEND_LONG_FMT, offset);
    if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
      ZVAL_NULL(EX_VAR(opline->result.var));
    }
    return;
  }

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

  if (UNEXPECTED(Z_TYPE_P(value) != IS_STRING)) {
    zend_string *tmp;

    /* The string may be destroyed while throwing the notice.
     * Temporarily increase the refcount to detect this situation. */
    GC_ADDREF(s);
    if (UNEXPECTED(Z_TYPE_P(value) == IS_UNDEF)) {
      zval_undefined_cv((opline+1)->op1.var EXECUTE_DATA_CC);
    }
    /* Convert to string, just the time to pick the 1st byte */
    tmp = zval_try_get_string_func(value);
    if (UNEXPECTED(GC_DELREF(s) == 0)) {
      zend_string_efree(s);
      if (tmp) {
        zend_string_release_ex(tmp, 0);
      }
      if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
        ZVAL_NULL(EX_VAR(opline->result.var));
      }
      return;
    }
    if (UNEXPECTED(!tmp)) {
      if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
        ZVAL_UNDEF(EX_VAR(opline->result.var));
      }
      return;
    }

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

  if (UNEXPECTED(string_len != 1)) {
    if (string_len == 0) {
      /* Error on empty input string */
      zend_throw_error(NULL, "Cannot assign an empty string to a string offset");
      if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
        ZVAL_NULL(EX_VAR(opline->result.var));
      }
      return;
    }

    /* The string may be destroyed while throwing the notice.
     * Temporarily increase the refcount to detect this situation. */
    GC_ADDREF(s);
    zend_error(E_WARNING, "Only the first byte will be assigned to the string offset");
    if (UNEXPECTED(GC_DELREF(s) == 0)) {
      zend_string_efree(s);
      if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
        ZVAL_NULL(EX_VAR(opline->result.var));
      }
      return;
    }
    /* Illegal offset assignment */
    if (UNEXPECTED(EG(exception) != NULL)) {
      if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
        ZVAL_UNDEF(EX_VAR(opline->result.var));
      }
      return;
    }
  }

  if ((size_t)offset >= ZSTR_LEN(s)) {
    /* Extend string if needed */
    zend_long old_len = ZSTR_LEN(s);
    ZVAL_NEW_STR(str, zend_string_extend(s, (size_t)offset + 1, 0));
    memset(Z_STRVAL_P(str) + old_len, ' ', offset - old_len);
    Z_STRVAL_P(str)[offset+1] = 0;
  } else {
    zend_string_forget_hash_val(Z_STR_P(str));
  }

  Z_STRVAL_P(str)[offset] = c;

  if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
    /* Return the new character */
    ZVAL_CHAR(EX_VAR(opline->result.var), c);
  }
}

static zend_property_info *zend_get_prop_not_accepting_double(zend_reference *ref)
{
  zend_property_info *prop;
  ZEND_REF_FOREACH_TYPE_SOURCES(ref, prop) {
    if (!(ZEND_TYPE_FULL_MASK(prop->type) & MAY_BE_DOUBLE)) {
      return prop;
    }
  } ZEND_REF_FOREACH_TYPE_SOURCES_END();
  return NULL;
}

static ZEND_COLD zend_long zend_throw_incdec_ref_error(
    zend_reference *ref, zend_property_info *error_prop OPLINE_DC)
{
  zend_string *type_str = zend_type_to_string(error_prop->type);
  if (ZEND_IS_INCREMENT(opline->opcode)) {
    zend_type_error(
      "Cannot increment a reference held by property %s::$%s of type %s past its maximal value",
      ZSTR_VAL(error_prop->ce->name),
      zend_get_unmangled_property_name(error_prop->name),
      ZSTR_VAL(type_str));
    zend_string_release(type_str);
    return ZEND_LONG_MAX;
  } else {
    zend_type_error(
      "Cannot decrement a reference held by property %s::$%s of type %s past its minimal value",
      ZSTR_VAL(error_prop->ce->name),
      zend_get_unmangled_property_name(error_prop->name),
      ZSTR_VAL(type_str));
    zend_string_release(type_str);
    return ZEND_LONG_MIN;
  }
}

static ZEND_COLD zend_long zend_throw_incdec_prop_error(zend_property_info *prop OPLINE_DC) {
  zend_string *type_str = zend_type_to_string(prop->type);
  if (ZEND_IS_INCREMENT(opline->opcode)) {
    zend_type_error("Cannot increment property %s::$%s of type %s past its maximal value",
      ZSTR_VAL(prop->ce->name),
      zend_get_unmangled_property_name(prop->name),
      ZSTR_VAL(type_str));
    zend_string_release(type_str);
    return ZEND_LONG_MAX;
  } else {
    zend_type_error("Cannot decrement property %s::$%s of type %s past its minimal value",
      ZSTR_VAL(prop->ce->name),
      zend_get_unmangled_property_name(prop->name),
      ZSTR_VAL(type_str));
    zend_string_release(type_str);
    return ZEND_LONG_MIN;
  }
}

static void zend_incdec_typed_ref(zend_reference *ref, zval *copy OPLINE_DC EXECUTE_DATA_DC)
{
  zval tmp;
  zval *var_ptr = &ref->val;

  if (!copy) {
    copy = &tmp;
  }

  ZVAL_COPY(copy, var_ptr);

  if (ZEND_IS_INCREMENT(opline->opcode)) {
    increment_function(var_ptr);
  } else {
    decrement_function(var_ptr);
  }

  if (UNEXPECTED(Z_TYPE_P(var_ptr) == IS_DOUBLE) && Z_TYPE_P(copy) == IS_LONG) {
    zend_property_info *error_prop = zend_get_prop_not_accepting_double(ref);
    if (UNEXPECTED(error_prop)) {
      zend_long val = zend_throw_incdec_ref_error(ref, error_prop OPLINE_CC);
      ZVAL_LONG(var_ptr, val);
    }
  } else if (UNEXPECTED(!zend_verify_ref_assignable_zval(ref, var_ptr, EX_USES_STRICT_TYPES()))) {
    zval_ptr_dtor(var_ptr);
    ZVAL_COPY_VALUE(var_ptr, copy);
    ZVAL_UNDEF(copy);
  } else if (copy == &tmp) {
    zval_ptr_dtor(&tmp);
  }
}

static void zend_incdec_typed_prop(zend_property_info *prop_info, zval *var_ptr, zval *copy OPLINE_DC EXECUTE_DATA_DC)
{
  zval tmp;

  if (!copy) {
    copy = &tmp;
  }

  ZVAL_COPY(copy, var_ptr);

  if (ZEND_IS_INCREMENT(opline->opcode)) {
    increment_function(var_ptr);
  } else {
    decrement_function(var_ptr);
  }

  if (UNEXPECTED(Z_TYPE_P(var_ptr) == IS_DOUBLE) && Z_TYPE_P(copy) == IS_LONG) {
    if (!(ZEND_TYPE_FULL_MASK(prop_info->type) & MAY_BE_DOUBLE)) {
      zend_long val = zend_throw_incdec_prop_error(prop_info OPLINE_CC);
      ZVAL_LONG(var_ptr, val);
    }
  } else if (UNEXPECTED(!zend_verify_property_type(prop_info, var_ptr, EX_USES_STRICT_TYPES()))) {
    zval_ptr_dtor(var_ptr);
    ZVAL_COPY_VALUE(var_ptr, copy);
    ZVAL_UNDEF(copy);
  } else if (copy == &tmp) {
    zval_ptr_dtor(&tmp);
  }
}

static void zend_pre_incdec_property_zval(zval *prop, zend_property_info *prop_info OPLINE_DC EXECUTE_DATA_DC)
{
  if (EXPECTED(Z_TYPE_P(prop) == IS_LONG)) {
    if (ZEND_IS_INCREMENT(opline->opcode)) {
      fast_long_increment_function(prop);
    } else {
      fast_long_decrement_function(prop);
    }
    if (UNEXPECTED(Z_TYPE_P(prop) != IS_LONG) && prop_info
        && !(ZEND_TYPE_FULL_MASK(prop_info->type) & MAY_BE_DOUBLE)) {
      zend_long val = zend_throw_incdec_prop_error(prop_info OPLINE_CC);
      ZVAL_LONG(prop, val);
    }
  } else {
    do {
      if (Z_ISREF_P(prop)) {
        zend_reference *ref = Z_REF_P(prop);
        prop = Z_REFVAL_P(prop);
        if (UNEXPECTED(ZEND_REF_HAS_TYPE_SOURCES(ref))) {
          zend_incdec_typed_ref(ref, NULL OPLINE_CC EXECUTE_DATA_CC);
          break;
        }
      }

      if (prop_info) {
        zend_incdec_typed_prop(prop_info, prop, NULL OPLINE_CC EXECUTE_DATA_CC);
      } else if (ZEND_IS_INCREMENT(opline->opcode)) {
        increment_function(prop);
      } else {
        decrement_function(prop);
      }
    } while (0);
  }
  if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
    ZVAL_COPY(EX_VAR(opline->result.var), prop);
  }
}

static void zend_post_incdec_property_zval(zval *prop, zend_property_info *prop_info OPLINE_DC EXECUTE_DATA_DC)
{
  if (EXPECTED(Z_TYPE_P(prop) == IS_LONG)) {
    ZVAL_LONG(EX_VAR(opline->result.var), Z_LVAL_P(prop));
    if (ZEND_IS_INCREMENT(opline->opcode)) {
      fast_long_increment_function(prop);
    } else {
      fast_long_decrement_function(prop);
    }
    if (UNEXPECTED(Z_TYPE_P(prop) != IS_LONG) && prop_info
        && !(ZEND_TYPE_FULL_MASK(prop_info->type) & MAY_BE_DOUBLE)) {
      zend_long val = zend_throw_incdec_prop_error(prop_info OPLINE_CC);
      ZVAL_LONG(prop, val);
    }
  } else {
    if (Z_ISREF_P(prop)) {
      zend_reference *ref = Z_REF_P(prop);
      prop = Z_REFVAL_P(prop);
      if (ZEND_REF_HAS_TYPE_SOURCES(ref)) {
        zend_incdec_typed_ref(ref, EX_VAR(opline->result.var) OPLINE_CC EXECUTE_DATA_CC);
        return;
      }
    }

    if (prop_info) {
      zend_incdec_typed_prop(prop_info, prop, EX_VAR(opline->result.var) OPLINE_CC EXECUTE_DATA_CC);
    } else {
      ZVAL_COPY(EX_VAR(opline->result.var), prop);
      if (ZEND_IS_INCREMENT(opline->opcode)) {
        increment_function(prop);
      } else {
        decrement_function(prop);
      }
    }
  }
}

static zend_never_inline void zend_post_incdec_overloaded_property(zend_object *object, zend_string *name, void **cache_slot OPLINE_DC EXECUTE_DATA_DC)
{
  zval rv;
  zval *z;
  zval z_copy;

  GC_ADDREF(object);
  z =object->handlers->read_property(object, name, BP_VAR_R, cache_slot, &rv);
  if (UNEXPECTED(EG(exception))) {
    OBJ_RELEASE(object);
    ZVAL_UNDEF(EX_VAR(opline->result.var));
    return;
  }

  ZVAL_COPY_DEREF(&z_copy, z);
  ZVAL_COPY(EX_VAR(opline->result.var), &z_copy);
  if (ZEND_IS_INCREMENT(opline->opcode)) {
    increment_function(&z_copy);
  } else {
    decrement_function(&z_copy);
  }
  object->handlers->write_property(object, name, &z_copy, cache_slot);
  OBJ_RELEASE(object);
  zval_ptr_dtor(&z_copy);
  if (z == &rv) {
    zval_ptr_dtor(z);
  }
}

static zend_never_inline void zend_pre_incdec_overloaded_property(zend_object *object, zend_string *name, void **cache_slot OPLINE_DC EXECUTE_DATA_DC)
{
  zval rv;
  zval *z;
  zval z_copy;

  GC_ADDREF(object);
  z = object->handlers->read_property(object, name, BP_VAR_R, cache_slot, &rv);
  if (UNEXPECTED(EG(exception))) {
    OBJ_RELEASE(object);
    if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
      ZVAL_NULL(EX_VAR(opline->result.var));
    }
    return;
  }

  ZVAL_COPY_DEREF(&z_copy, z);
  if (ZEND_IS_INCREMENT(opline->opcode)) {
    increment_function(&z_copy);
  } else {
    decrement_function(&z_copy);
  }
  if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
    ZVAL_COPY(EX_VAR(opline->result.var), &z_copy);
  }
  object->handlers->write_property(object, name, &z_copy, cache_slot);
  OBJ_RELEASE(object);
  zval_ptr_dtor(&z_copy);
  if (z == &rv) {
    zval_ptr_dtor(z);
  }
}

static zend_never_inline void zend_assign_op_overloaded_property(zend_object *object, zend_string *name, void **cache_slot, zval *value OPLINE_DC EXECUTE_DATA_DC)
{
  zval *z;
  zval rv, res;

  GC_ADDREF(object);
  z = object->handlers->read_property(object, name, BP_VAR_R, cache_slot, &rv);
  if (UNEXPECTED(EG(exception))) {
    OBJ_RELEASE(object);
    if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
      ZVAL_UNDEF(EX_VAR(opline->result.var));
    }
    return;
  }
  if (zend_binary_op(&res, z, value OPLINE_CC) == SUCCESS) {
    object->handlers->write_property(object, name, &res, cache_slot);
  }
  if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
    ZVAL_COPY(EX_VAR(opline->result.var), &res);
  }
  if (z == &rv) {
    zval_ptr_dtor(z);
  }
  zval_ptr_dtor(&res);
  OBJ_RELEASE(object);
}

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


static void zend_extension_fcall_begin_handler(const zend_extension *extension, zend_execute_data *frame)
{
  if (extension->fcall_begin_handler) {
    extension->fcall_begin_handler(frame);
  }
}


static void zend_extension_fcall_end_handler(const zend_extension *extension, zend_execute_data *frame)
{
  if (extension->fcall_end_handler) {
    extension->fcall_end_handler(frame);
  }
}


static zend_always_inline HashTable *zend_get_target_symbol_table(int fetch_type EXECUTE_DATA_DC)
{
  HashTable *ht;

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

static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_undefined_offset(zend_long lval)
{
  zend_error(E_WARNING, "Undefined array key " ZEND_LONG_FMT, lval);
}

static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_undefined_index(const zend_string *offset)
{
  zend_error(E_WARNING, "Undefined array key \"%s\"", ZSTR_VAL(offset));
}

ZEND_API ZEND_COLD zval* ZEND_FASTCALL zend_undefined_offset_write(HashTable *ht, zend_long lval)
{
  /* The array may be destroyed while throwing the notice.
   * Temporarily increase the refcount to detect this situation. */
  if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE)) {
    GC_ADDREF(ht);
  }
  zend_undefined_offset(lval);
  if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && GC_DELREF(ht) != 1) {
    if (!GC_REFCOUNT(ht)) {
      zend_array_destroy(ht);
    }
    return NULL;
  }
  if (EG(exception)) {
    return NULL;
  }
  return zend_hash_index_add_new(ht, lval, &EG(uninitialized_zval));
}

ZEND_API ZEND_COLD zval* ZEND_FASTCALL zend_undefined_index_write(HashTable *ht, zend_string *offset)
{
  zval *retval;

  /* The array may be destroyed while throwing the notice.
   * Temporarily increase the refcount to detect this situation. */
  if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE)) {
    GC_ADDREF(ht);
  }
  /* Key may be released while throwing the undefined index warning. */
  zend_string_addref(offset);
  zend_undefined_index(offset);
  if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && GC_DELREF(ht) != 1) {
    if (!GC_REFCOUNT(ht)) {
      zend_array_destroy(ht);
    }
    retval = NULL;
  } else if (EG(exception)) {
    retval = NULL;
  } else {
    retval = zend_hash_add_new(ht, offset, &EG(uninitialized_zval));
  }
  zend_string_release(offset);
  return retval;
}

ZEND_API zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_undefined_method(const zend_class_entry *ce, const zend_string *method)
{
  zend_throw_error(NULL, "Call to undefined method %s::%s()", ZSTR_VAL(ce->name), ZSTR_VAL(method));
}

static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_invalid_method_call(zval *object, zval *function_name)
{
  zend_throw_error(NULL, "Call to a member function %s() on %s",
    Z_STRVAL_P(function_name), zend_zval_value_name(object));
}

ZEND_API void ZEND_FASTCALL zend_non_static_method_call(const zend_function *fbc)
{
  zend_throw_error(
    zend_ce_error,
    "Non-static method %s::%s() cannot be called statically",
    ZSTR_VAL(fbc->common.scope->name), ZSTR_VAL(fbc->common.function_name));
}

ZEND_COLD void ZEND_FASTCALL zend_param_must_be_ref(const zend_function *func, uint32_t arg_num)
{
  const char *arg_name = get_function_arg_name(func, arg_num);

  zend_error(E_WARNING, "%s%s%s(): Argument #%d%s%s%s must be passed by reference, value given",
    func->common.scope ? ZSTR_VAL(func->common.scope->name) : "",
    func->common.scope ? "::" : "",
    ZSTR_VAL(func->common.function_name),
    arg_num,
    arg_name ? " ($" : "",
    arg_name ? arg_name : "",
    arg_name ? ")" : ""
  );
}

static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_use_scalar_as_array(void)
{
  zend_throw_error(NULL, "Cannot use a scalar value as an array");
}

ZEND_API zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_cannot_add_element(void)
{
  zend_throw_error(NULL, "Cannot add element to the array as the next element is already occupied");
}

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_use_resource_as_offset(const zval *dim)
{
  zend_error(E_WARNING,
    "Resource ID#" ZEND_LONG_FMT " used as offset, casting to integer (" ZEND_LONG_FMT ")",
    Z_RES_HANDLE_P(dim), Z_RES_HANDLE_P(dim));
}

static zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_use_new_element_for_string(void)
{
  zend_throw_error(NULL, "[] operator not supported for strings");
}

#ifdef ZEND_CHECK_STACK_LIMIT
ZEND_API zend_never_inline ZEND_COLD void ZEND_FASTCALL zend_call_stack_size_error(void)
{
  size_t max_stack_size = 0;
  if ((uintptr_t) EG(stack_base) > (uintptr_t) EG(stack_limit)) {
    max_stack_size = (size_t) ((uintptr_t) EG(stack_base) - (uintptr_t) EG(stack_limit));
  }

  zend_throw_error(NULL, "Maximum call stack size of %zu bytes (zend.max_allowed_stack_size - zend.reserved_stack_size) reached. Infinite recursion?",
    max_stack_size);
}
#endif /* ZEND_CHECK_STACK_LIMIT */

static ZEND_COLD void zend_binary_assign_op_dim_slow(zval *container, zval *dim OPLINE_DC EXECUTE_DATA_DC)
{
  if (UNEXPECTED(Z_TYPE_P(container) == IS_STRING)) {
    if (opline->op2_type == IS_UNUSED) {
      zend_use_new_element_for_string();
    } else {
      zend_check_string_offset(dim, BP_VAR_RW EXECUTE_DATA_CC);
      zend_wrong_string_offset_error();
    }
  } else {
    zend_use_scalar_as_array();
  }
}

static zend_never_inline uint8_t slow_index_convert(HashTable *ht, const zval *dim, zend_value *value EXECUTE_DATA_DC)
{
  switch (Z_TYPE_P(dim)) {
    case IS_UNDEF: {
      /* The array may be destroyed while throwing the notice.
       * Temporarily increase the refcount to detect this situation. */
      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE)) {
        GC_ADDREF(ht);
      }
      ZVAL_UNDEFINED_OP2();
      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && !GC_DELREF(ht)) {
        zend_array_destroy(ht);
        return IS_NULL;
      }
      if (EG(exception)) {
        return IS_NULL;
      }
      ZEND_FALLTHROUGH;
    }
    case IS_NULL:
      /* The array may be destroyed while throwing the notice.
       * Temporarily increase the refcount to detect this situation. */
      GC_TRY_ADDREF(ht);

      zend_error(E_DEPRECATED, "Using null as an array offset is deprecated, use an empty string instead");

      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && !GC_DELREF(ht)) {
        zend_array_destroy(ht);
        return IS_NULL;
      }

      if (EG(exception)) {
        return IS_NULL;
      }

      value->str = ZSTR_EMPTY_ALLOC();
      return IS_STRING;
    case IS_DOUBLE:
      /* The array may be destroyed while throwing the notice.
       * Temporarily increase the refcount to detect this situation. */
      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE)) {
        GC_ADDREF(ht);
      }
      value->lval = zend_dval_to_lval_safe(Z_DVAL_P(dim));
      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && !GC_DELREF(ht)) {
        zend_array_destroy(ht);
        return IS_NULL;
      }
      if (EG(exception)) {
        return IS_NULL;
      }
      return IS_LONG;
    case IS_RESOURCE:
      /* The array may be destroyed while throwing the notice.
       * Temporarily increase the refcount to detect this situation. */
      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE)) {
        GC_ADDREF(ht);
      }
      zend_use_resource_as_offset(dim);
      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && !GC_DELREF(ht)) {
        zend_array_destroy(ht);
        return IS_NULL;
      }
      if (EG(exception)) {
        return IS_NULL;
      }
      value->lval = Z_RES_HANDLE_P(dim);
      return IS_LONG;
    case IS_FALSE:
      value->lval = 0;
      return IS_LONG;
    case IS_TRUE:
      value->lval = 1;
      return IS_LONG;
    default:
      zend_illegal_array_offset_access(dim);
      return IS_NULL;
  }
}

static zend_never_inline uint8_t slow_index_convert_w(HashTable *ht, const zval *dim, zend_value *value EXECUTE_DATA_DC)
{
  switch (Z_TYPE_P(dim)) {
    case IS_UNDEF: {
      /* The array may be destroyed while throwing the notice.
       * Temporarily increase the refcount to detect this situation. */
      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE)) {
        GC_ADDREF(ht);
      }
      ZVAL_UNDEFINED_OP2();
      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && GC_DELREF(ht) != 1) {
        if (!GC_REFCOUNT(ht)) {
          zend_array_destroy(ht);
        }
        return IS_NULL;
      }
      if (EG(exception)) {
        return IS_NULL;
      }
      ZEND_FALLTHROUGH;
    }
    case IS_NULL:
      /* The array may be destroyed while throwing the notice.
       * Temporarily increase the refcount to detect this situation. */
      GC_TRY_ADDREF(ht);

      zend_error(E_DEPRECATED, "Using null as an array offset is deprecated, use an empty string instead");

      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && GC_DELREF(ht) != 1) {
        if (!GC_REFCOUNT(ht)) {
          zend_array_destroy(ht);
        }
        return IS_NULL;
      }
      if (EG(exception)) {
        return IS_NULL;
      }
      value->str = ZSTR_EMPTY_ALLOC();
      return IS_STRING;
    case IS_DOUBLE:
      /* The array may be destroyed while throwing the notice.
       * Temporarily increase the refcount to detect this situation. */
      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE)) {
        GC_ADDREF(ht);
      }
      value->lval = zend_dval_to_lval_safe(Z_DVAL_P(dim));
      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && GC_DELREF(ht) != 1) {
        if (!GC_REFCOUNT(ht)) {
          zend_array_destroy(ht);
        }
        return IS_NULL;
      }
      if (EG(exception)) {
        return IS_NULL;
      }
      return IS_LONG;
    case IS_RESOURCE:
      /* The array may be destroyed while throwing the notice.
       * Temporarily increase the refcount to detect this situation. */
      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE)) {
        GC_ADDREF(ht);
      }
      zend_use_resource_as_offset(dim);
      if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && GC_DELREF(ht) != 1) {
        if (!GC_REFCOUNT(ht)) {
          zend_array_destroy(ht);
        }
        return IS_NULL;
      }
      if (EG(exception)) {
        return IS_NULL;
      }
      value->lval = Z_RES_HANDLE_P(dim);
      return IS_LONG;
    case IS_FALSE:
      value->lval = 0;
      return IS_LONG;
    case IS_TRUE:
      value->lval = 1;
      return IS_LONG;
    default:
      zend_illegal_array_offset_access(dim);
      return IS_NULL;
  }
}

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

try_again:
  if (EXPECTED(Z_TYPE_P(dim) == IS_LONG)) {
    hval = Z_LVAL_P(dim);
num_index:
    if (type != BP_VAR_W) {
      ZEND_HASH_INDEX_FIND(ht, hval, retval, num_undef);
      return retval;
num_undef:
      switch (type) {
        case BP_VAR_R:
          zend_undefined_offset(hval);
          ZEND_FALLTHROUGH;
        case BP_VAR_UNSET:
        case BP_VAR_IS:
          retval = &EG(uninitialized_zval);
          break;
        case BP_VAR_RW:
          retval = zend_undefined_offset_write(ht, hval);
          break;
        }
    } else {
      ZEND_HASH_INDEX_LOOKUP(ht, hval, retval);
    }
  } else if (EXPECTED(Z_TYPE_P(dim) == IS_STRING)) {
    offset_key = Z_STR_P(dim);
    if (ZEND_CONST_COND(dim_type != IS_CONST, 1)) {
      if (ZEND_HANDLE_NUMERIC(offset_key, hval)) {
        goto num_index;
      }
    }
str_index:
    if (type != BP_VAR_W) {
      retval = zend_hash_find_ex(ht, offset_key, ZEND_CONST_COND(dim_type == IS_CONST, 0));
      if (!retval) {
        switch (type) {
          case BP_VAR_R:
            zend_undefined_index(offset_key);
            ZEND_FALLTHROUGH;
          case BP_VAR_UNSET:
          case BP_VAR_IS:
            retval = &EG(uninitialized_zval);
            break;
          case BP_VAR_RW:
            retval = zend_undefined_index_write(ht, offset_key);
            break;
        }
      }
    } else {
      retval = zend_hash_lookup(ht, offset_key);
    }
  } else if (EXPECTED(Z_TYPE_P(dim) == IS_REFERENCE)) {
    dim = Z_REFVAL_P(dim);
    goto try_again;
  } else {
    zend_value val;
    uint8_t t;

    if (type != BP_VAR_W && type != BP_VAR_RW) {
      t = slow_index_convert(ht, dim, &val EXECUTE_DATA_CC);
    } else {
      t = slow_index_convert_w(ht, dim, &val EXECUTE_DATA_CC);
    }
    if (t == IS_STRING) {
      offset_key = val.str;
      goto str_index;
    } else if (t == IS_LONG) {
      hval = val.lval;
      goto num_index;
    } else {
      retval = (type == BP_VAR_W || type == BP_VAR_RW) ?
          NULL : &EG(uninitialized_zval);
    }
  }
  return retval;
}

static zend_never_inline zval* ZEND_FASTCALL zend_fetch_dimension_address_inner_W(HashTable *ht, const zval *dim EXECUTE_DATA_DC)
{
  return zend_fetch_dimension_address_inner(ht, dim, IS_TMP_VAR, BP_VAR_W EXECUTE_DATA_CC);
}

static zend_never_inline zval* ZEND_FASTCALL zend_fetch_dimension_address_inner_W_CONST(HashTable *ht, const zval *dim EXECUTE_DATA_DC)
{
  return zend_fetch_dimension_address_inner(ht, dim, IS_CONST, BP_VAR_W EXECUTE_DATA_CC);
}

static zend_never_inline zval* ZEND_FASTCALL zend_fetch_dimension_address_inner_RW(HashTable *ht, const zval *dim EXECUTE_DATA_DC)
{
  return zend_fetch_dimension_address_inner(ht, dim, IS_TMP_VAR, BP_VAR_RW EXECUTE_DATA_CC);
}

static zend_never_inline zval* ZEND_FASTCALL zend_fetch_dimension_address_inner_RW_CONST(HashTable *ht, const zval *dim EXECUTE_DATA_DC)
{
  return zend_fetch_dimension_address_inner(ht, dim, IS_CONST, BP_VAR_RW EXECUTE_DATA_CC);
}

static zend_always_inline void zend_fetch_dimension_address(zval *result, zval *container, zval *dim, int dim_type, int type EXECUTE_DATA_DC)
{
  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_cannot_add_element();
        ZVAL_UNDEF(result);
        return;
      }
    } else {
      retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type EXECUTE_DATA_CC);
      if (UNEXPECTED(!retval)) {
        /* This may fail without throwing if the array was modified while throwing an
         * undefined index error. */
        ZVAL_NULL(result);
        return;
      }
    }
    ZVAL_INDIRECT(result, retval);
    return;
  } else if (EXPECTED(Z_TYPE_P(container) == IS_REFERENCE)) {
    zend_reference *ref = Z_REF_P(container);
    container = Z_REFVAL_P(container);
    if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
      goto try_array;
    } else if (EXPECTED(Z_TYPE_P(container) <= IS_FALSE)) {
      if (type != BP_VAR_UNSET) {
        if (ZEND_REF_HAS_TYPE_SOURCES(ref)) {
          if (UNEXPECTED(!zend_verify_ref_array_assignable(ref))) {
            ZVAL_UNDEF(result);
            return;
          }
        }
        array_init(container);
        goto fetch_from_array;
      } else {
        goto return_null;
      }
    }
  }
  if (UNEXPECTED(Z_TYPE_P(container) == IS_STRING)) {
    if (dim == NULL) {
      zend_use_new_element_for_string();
    } else {
      zend_check_string_offset(dim, type EXECUTE_DATA_CC);
      zend_wrong_string_offset_error();
    }
    ZVAL_UNDEF(result);
  } else if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
    zend_object *obj = Z_OBJ_P(container);
    GC_ADDREF(obj);
    if (ZEND_CONST_COND(dim_type == IS_CV, dim != NULL) && UNEXPECTED(Z_TYPE_P(dim) == IS_UNDEF)) {
      dim = ZVAL_UNDEFINED_OP2();
    } else if (dim_type == IS_CONST && Z_EXTRA_P(dim) == ZEND_EXTRA_VALUE) {
      dim++;
    }
    retval = obj->handlers->read_dimension(obj, dim, type, result);

    if (UNEXPECTED(retval == &EG(uninitialized_zval))) {
      zend_class_entry *ce = obj->ce;

      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 (result != retval) {
          ZVAL_COPY(result, retval);
          retval = result;
        }
        if (Z_TYPE_P(retval) != IS_OBJECT) {
          zend_class_entry *ce = obj->ce;
          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 {
      ZEND_ASSERT(EG(exception) && "read_dimension() returned NULL without exception");
      ZVAL_UNDEF(result);
    }
    if (UNEXPECTED(GC_DELREF(obj) == 0)) {
      zend_objects_store_del(obj);
    }
  } else {
    if (EXPECTED(Z_TYPE_P(container) <= IS_FALSE)) {
      if (type != BP_VAR_W && UNEXPECTED(Z_TYPE_P(container) == IS_UNDEF)) {
        ZVAL_UNDEFINED_OP1();
      }
      if (type != BP_VAR_UNSET) {
        HashTable *ht = zend_new_array(0);
        uint8_t old_type = Z_TYPE_P(container);

        ZVAL_ARR(container, ht);
        if (UNEXPECTED(old_type == IS_FALSE)) {
          GC_ADDREF(ht);
          zend_false_to_array_deprecated();
          if (UNEXPECTED(GC_DELREF(ht) == 0)) {
            zend_array_destroy(ht);
            goto return_null;
          }
        }
        goto fetch_from_array;
      } else {
        if (UNEXPECTED(Z_TYPE_P(container) == IS_FALSE)) {
          zend_false_to_array_deprecated();
        }
return_null:
        /* for read-mode only */
        if (ZEND_CONST_COND(dim_type == IS_CV, dim != NULL) && UNEXPECTED(Z_TYPE_P(dim) == IS_UNDEF)) {
          ZVAL_UNDEFINED_OP2();
        }
        ZVAL_NULL(result);
      }
    } else {
      if (type == BP_VAR_UNSET) {
        zend_throw_error(NULL, "Cannot unset offset in a non-array variable");
        ZVAL_UNDEF(result);
      } else {
        zend_use_scalar_as_array();
        ZVAL_UNDEF(result);
      }
    }
  }
}

static zend_never_inline void ZEND_FASTCALL zend_fetch_dimension_address_W(zval *container_ptr, zval *dim, int dim_type OPLINE_DC EXECUTE_DATA_DC)
{
  zval *result = EX_VAR(opline->result.var);
  zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_W EXECUTE_DATA_CC);
}

static zend_never_inline void ZEND_FASTCALL zend_fetch_dimension_address_RW(zval *container_ptr, zval *dim, int dim_type OPLINE_DC EXECUTE_DATA_DC)
{
  zval *result = EX_VAR(opline->result.var);
  zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_RW EXECUTE_DATA_CC);
}

static zend_never_inline void ZEND_FASTCALL zend_fetch_dimension_address_UNSET(zval *container_ptr, zval *dim, int dim_type OPLINE_DC EXECUTE_DATA_DC)
{
  zval *result = EX_VAR(opline->result.var);
  zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_UNSET EXECUTE_DATA_CC);
}

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

  if (!slow) {
    if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
try_array:
      retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type EXECUTE_DATA_CC);
      ZVAL_COPY_DEREF(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 (!is_list && EXPECTED(Z_TYPE_P(container) == IS_STRING)) {
    zend_string *str = Z_STR_P(container);
    zend_long offset;

try_string_offset:
    if (UNEXPECTED(Z_TYPE_P(dim) != IS_LONG)) {
      switch (Z_TYPE_P(dim)) {
        case IS_STRING:
        {
          bool trailing_data = false;
          /* For BC reasons we allow errors so that we can warn on leading numeric string */
          if (IS_LONG == is_numeric_string_ex(Z_STRVAL_P(dim), Z_STRLEN_P(dim), &offset,
              NULL, /* allow errors */ true, NULL, &trailing_data)) {
            if (UNEXPECTED(trailing_data)) {
              zend_error(E_WARNING, "Illegal string offset \"%s\"", Z_STRVAL_P(dim));
            }
            goto out;
          }
          if (type == BP_VAR_IS) {
            ZVAL_NULL(result);
            return;
          }
          zend_illegal_string_offset(dim, BP_VAR_R);
          ZVAL_NULL(result);
          return;
        }
        case IS_UNDEF:
          /* The string may be destroyed while throwing the notice.
           * Temporarily increase the refcount to detect this situation. */
          if (!(GC_FLAGS(str) & IS_STR_INTERNED)) {
            GC_ADDREF(str);
          }
          ZVAL_UNDEFINED_OP2();
          if (!(GC_FLAGS(str) & IS_STR_INTERNED) && UNEXPECTED(GC_DELREF(str) == 0)) {
            zend_string_efree(str);
            ZVAL_NULL(result);
            return;
          }
          ZEND_FALLTHROUGH;
        case IS_DOUBLE:
        case IS_NULL:
        case IS_FALSE:
        case IS_TRUE:
          if (type != BP_VAR_IS) {
            /* The string may be destroyed while throwing the notice.
             * Temporarily increase the refcount to detect this situation. */
            if (!(GC_FLAGS(str) & IS_STR_INTERNED)) {
              GC_ADDREF(str);
            }
            zend_error(E_WARNING, "String offset cast occurred");
            if (!(GC_FLAGS(str) & IS_STR_INTERNED) && UNEXPECTED(GC_DELREF(str) == 0)) {
              zend_string_efree(str);
              ZVAL_NULL(result);
              return;
            }
          }
          /* To prevent double warning */
          if (Z_TYPE_P(dim) == IS_DOUBLE) {
            offset = zend_dval_to_lval_silent(Z_DVAL_P(dim));
            goto out;
          }
          break;
        case IS_REFERENCE:
          dim = Z_REFVAL_P(dim);
          goto try_string_offset;
        default:
          zend_illegal_string_offset(dim, BP_VAR_R);
          ZVAL_NULL(result);
          return;
      }

      offset = zval_get_long_func(dim, /* is_strict */ false);
    } else {
      offset = Z_LVAL_P(dim);
    }
    out:

    if (UNEXPECTED(ZSTR_LEN(str) < ((offset < 0) ? -(size_t)offset : ((size_t)offset + 1)))) {
      if (type != BP_VAR_IS) {
        zend_error(E_WARNING, "Uninitialized string offset " ZEND_LONG_FMT, 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)ZSTR_LEN(str) + offset : offset;
      c = (zend_uchar)ZSTR_VAL(str)[real_offset];

      ZVAL_CHAR(result, c);
    }
  } else if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
    zend_object *obj = Z_OBJ_P(container);

    GC_ADDREF(obj);
    if (ZEND_CONST_COND(dim_type == IS_CV, 1) && UNEXPECTED(Z_TYPE_P(dim) == IS_UNDEF)) {
      dim = ZVAL_UNDEFINED_OP2();
    }
    if (dim_type == IS_CONST && Z_EXTRA_P(dim) == ZEND_EXTRA_VALUE) {
      dim++;
    }
    retval = obj->handlers->read_dimension(obj, dim, type, result);

    ZEND_ASSERT(result != NULL);
    if (retval) {
      if (result != retval) {
        ZVAL_COPY_DEREF(result, retval);
      } else if (UNEXPECTED(Z_ISREF_P(retval))) {
        zend_unwrap_reference(result);
      }
    } else {
      ZVAL_NULL(result);
    }
    if (UNEXPECTED(GC_DELREF(obj) == 0)) {
      zend_objects_store_del(obj);
    }
  } else {
    if (type != BP_VAR_IS && UNEXPECTED(Z_TYPE_P(container) == IS_UNDEF)) {
      container = ZVAL_UNDEFINED_OP1();
    }
    if (ZEND_CONST_COND(dim_type == IS_CV, 1) && UNEXPECTED(Z_TYPE_P(dim) == IS_UNDEF)) {
      ZVAL_UNDEFINED_OP2();
    }
    if (is_list && Z_TYPE_P(container) > IS_NULL) {
      zend_error(E_WARNING, "Cannot use %s as array", zend_zval_type_name(container));
    }
    if (!is_list && type != BP_VAR_IS) {
      zend_error(E_WARNING, "Trying to access array offset on %s",
        zend_zval_value_name(container));
    }
    ZVAL_NULL(result);
  }
}

static zend_never_inline void ZEND_FASTCALL zend_fetch_dimension_address_read_R(zval *container, zval *dim, int dim_type OPLINE_DC EXECUTE_DATA_DC)
{
  zval *result = EX_VAR(opline->result.var);
  zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_R, 0, 0 EXECUTE_DATA_CC);
}

static zend_never_inline void zend_fetch_dimension_address_read_R_slow(zval *container, zval *dim OPLINE_DC EXECUTE_DATA_DC)
{
  zval *result = EX_VAR(opline->result.var);
  zend_fetch_dimension_address_read(result, container, dim, IS_CV, BP_VAR_R, 0, 1 EXECUTE_DATA_CC);
}

static zend_never_inline void ZEND_FASTCALL zend_fetch_dimension_address_read_IS(zval *container, zval *dim, int dim_type OPLINE_DC EXECUTE_DATA_DC)
{
  zval *result = EX_VAR(opline->result.var);
  zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_IS, 0, 0 EXECUTE_DATA_CC);
}

static zend_never_inline void ZEND_FASTCALL zend_fetch_dimension_address_LIST_r(zval *container, zval *dim, int dim_type OPLINE_DC EXECUTE_DATA_DC)
{
  zval *result = EX_VAR(opline->result.var);
  zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_R, 1, 0 EXECUTE_DATA_CC);
}

ZEND_API void zend_fetch_dimension_const(zval *result, zval *container, zval *dim, int type)
{
  zend_fetch_dimension_address_read(result, container, dim, IS_TMP_VAR, type, 0, 0 NO_EXECUTE_DATA_CC);
}

static zend_never_inline zval* ZEND_FASTCALL zend_find_array_dim_slow(HashTable *ht, zval *offset EXECUTE_DATA_DC)
{
  zend_ulong hval;

  if (Z_TYPE_P(offset) == IS_DOUBLE) {
    /* The array may be destroyed while throwing a warning in case the float is not representable as an int.
     * Temporarily increase the refcount to detect this situation. */
    GC_TRY_ADDREF(ht);
    hval = zend_dval_to_lval_safe(Z_DVAL_P(offset));
    if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && !GC_DELREF(ht)) {
      zend_array_destroy(ht);
      return NULL;
    }
    if (EG(exception)) {
      return NULL;
    }
num_idx:
    return zend_hash_index_find(ht, hval);
  } else if (Z_TYPE_P(offset) == IS_NULL) {
null_undef_idx:
    /* The array may be destroyed while throwing the notice.
     * Temporarily increase the refcount to detect this situation. */
    GC_TRY_ADDREF(ht);

    zend_error(E_DEPRECATED, "Using null as an array offset is deprecated, use an empty string instead");

    if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && !GC_DELREF(ht)) {
      zend_array_destroy(ht);
      return NULL;
    }

    if (EG(exception)) {
      return NULL;
    }

    return zend_hash_find_known_hash(ht, ZSTR_EMPTY_ALLOC());
  } else if (Z_TYPE_P(offset) == IS_FALSE) {
    hval = 0;
    goto num_idx;
  } else if (Z_TYPE_P(offset) == IS_TRUE) {
    hval = 1;
    goto num_idx;
  } else if (Z_TYPE_P(offset) == IS_RESOURCE) {
    zend_use_resource_as_offset(offset);
    hval = Z_RES_HANDLE_P(offset);
    goto num_idx;
  } else if (/*OP2_TYPE == IS_CV &&*/ Z_TYPE_P(offset) == IS_UNDEF) {
    ZVAL_UNDEFINED_OP2();
    goto null_undef_idx;
  } else {
    zend_illegal_array_offset_isset(offset);
    return NULL;
  }
}

static zend_never_inline bool ZEND_FASTCALL zend_isset_dim_slow(zval *container, zval *offset EXECUTE_DATA_DC)
{
  if (/*OP2_TYPE == IS_CV &&*/ UNEXPECTED(Z_TYPE_P(offset) == IS_UNDEF)) {
    offset = ZVAL_UNDEFINED_OP2();
  }

  if (/*OP1_TYPE != IS_CONST &&*/ EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
    return Z_OBJ_HT_P(container)->has_dimension(Z_OBJ_P(container), offset, 0);
  } else if (EXPECTED(Z_TYPE_P(container) == IS_STRING)) { /* string offsets */
    zend_long lval;

    if (EXPECTED(Z_TYPE_P(offset) == IS_LONG)) {
      lval = Z_LVAL_P(offset);
str_offset:
      if (UNEXPECTED(lval < 0)) { /* Handle negative offset */
        lval += (zend_long)Z_STRLEN_P(container);
      }
      if (EXPECTED(lval >= 0) && (size_t)lval < Z_STRLEN_P(container)) {
        return 1;
      } else {
        return 0;
      }
    } else {
      /*if (OP2_TYPE & (IS_CV|IS_VAR)) {*/
        ZVAL_DEREF(offset);
      /*}*/
      if (Z_TYPE_P(offset) < IS_STRING /* simple scalar types */
          || (Z_TYPE_P(offset) == IS_STRING /* or numeric string */
            && IS_LONG == is_numeric_string(Z_STRVAL_P(offset), Z_STRLEN_P(offset), NULL, NULL, 0))) {
        lval = zval_get_long_ex(offset, /* is_strict */ true);
        goto str_offset;
      }
      return 0;
    }
  } else {
    return 0;
  }
}

static zend_never_inline bool ZEND_FASTCALL zend_isempty_dim_slow(zval *container, zval *offset EXECUTE_DATA_DC)
{
  if (/*OP2_TYPE == IS_CV &&*/ UNEXPECTED(Z_TYPE_P(offset) == IS_UNDEF)) {
    offset = ZVAL_UNDEFINED_OP2();
  }

  if (/*OP1_TYPE != IS_CONST &&*/ EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
    return !Z_OBJ_HT_P(container)->has_dimension(Z_OBJ_P(container), offset, 1);
  } else if (EXPECTED(Z_TYPE_P(container) == IS_STRING)) { /* string offsets */
    zend_long lval;

    if (EXPECTED(Z_TYPE_P(offset) == IS_LONG)) {
      lval = Z_LVAL_P(offset);
str_offset:
      if (UNEXPECTED(lval < 0)) { /* Handle negative offset */
        lval += (zend_long)Z_STRLEN_P(container);
      }
      if (EXPECTED(lval >= 0) && (size_t)lval < Z_STRLEN_P(container)) {
        return (Z_STRVAL_P(container)[lval] == '0');
      } else {
        return 1;
      }
    } else {
      /*if (OP2_TYPE & (IS_CV|IS_VAR)) {*/
        ZVAL_DEREF(offset);
      /*}*/
      if (Z_TYPE_P(offset) < IS_STRING /* simple scalar types */
          || (Z_TYPE_P(offset) == IS_STRING /* or numeric string */
            && IS_LONG == is_numeric_string(Z_STRVAL_P(offset), Z_STRLEN_P(offset), NULL, NULL, 0))) {
        lval = zval_get_long_ex(offset, /* is_strict */ true);
        goto str_offset;
      }
      return 1;
    }
  } else {
    return 1;
  }
}

static zend_never_inline bool ZEND_FASTCALL zend_array_key_exists_fast(HashTable *ht, zval *key OPLINE_DC EXECUTE_DATA_DC)
{
  zend_string *str;
  zend_ulong hval;

try_again:
  if (EXPECTED(Z_TYPE_P(key) == IS_STRING)) {
    str = Z_STR_P(key);
    if (ZEND_HANDLE_NUMERIC(str, hval)) {
      goto num_key;
    }
str_key:
    return zend_hash_exists(ht, str);
  } else if (EXPECTED(Z_TYPE_P(key) == IS_LONG)) {
    hval = Z_LVAL_P(key);
num_key:
    return zend_hash_index_exists(ht, hval);
  } else if (EXPECTED(Z_ISREF_P(key))) {
    key = Z_REFVAL_P(key);
    goto try_again;
  } else if (Z_TYPE_P(key) == IS_DOUBLE) {
    /* The array may be destroyed while throwing a warning in case the float is not representable as an int.
     * Temporarily increase the refcount to detect this situation. */
    GC_TRY_ADDREF(ht);
    hval = zend_dval_to_lval_safe(Z_DVAL_P(key));
    if (!(GC_FLAGS(ht) & IS_ARRAY_IMMUTABLE) && !GC_DELREF(ht)) {
      zend_array_destroy(ht);
      return false;
    }
    if (EG(exception)) {
      return false;
    }
    goto num_key;
  } else if (Z_TYPE_P(key) == IS_FALSE) {
    hval = 0;
    goto num_key;
  } else if (Z_TYPE_P(key) == IS_TRUE) {
    hval = 1;
    goto num_key;
  } else if (Z_TYPE_P(key) == IS_RESOURCE) {
    zend_use_resource_as_offset(key);
    hval = Z_RES_HANDLE_P(key);
    goto num_key;
  } else if (Z_TYPE_P(key) <= IS_NULL) {
    if (UNEXPECTED(Z_TYPE_P(key) == IS_UNDEF)) {
      ZVAL_UNDEFINED_OP1();
    } else {
      ZEND_ASSERT(Z_TYPE_P(key) == IS_NULL);
      zend_error(E_DEPRECATED, "Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead");
    }
    str = ZSTR_EMPTY_ALLOC();
    goto str_key;
  } else {
    zend_illegal_array_offset_access(key);
    return 0;
  }
}

static ZEND_COLD void ZEND_FASTCALL zend_array_key_exists_error(
    zval *subject, zval *key OPLINE_DC EXECUTE_DATA_DC)
{
  if (Z_TYPE_P(key) == IS_UNDEF) {
    ZVAL_UNDEFINED_OP1();
  }
  if (Z_TYPE_P(subject) == IS_UNDEF) {
    ZVAL_UNDEFINED_OP2();
  }
  if (!EG(exception)) {
    zend_type_error("array_key_exists(): Argument #2 ($array) must be of type array, %s given",
      zend_zval_value_name(subject));
  }
}

static zend_always_inline bool promotes_to_array(zval *val) {
  return Z_TYPE_P(val) <= IS_FALSE
    || (Z_ISREF_P(val) && Z_TYPE_P(Z_REFVAL_P(val)) <= IS_FALSE);
}

static zend_always_inline bool check_type_array_assignable(zend_type type) {
  if (!ZEND_TYPE_IS_SET(type)) {
    return 1;
  }
  return (ZEND_TYPE_FULL_MASK(type) & MAY_BE_ARRAY) != 0;
}

/* Checks whether an array can be assigned to the reference. Throws error if not assignable. */
ZEND_API bool zend_verify_ref_array_assignable(zend_reference *ref) {
  zend_property_info *prop;
  ZEND_ASSERT(ZEND_REF_HAS_TYPE_SOURCES(ref));
  ZEND_REF_FOREACH_TYPE_SOURCES(ref, prop) {
    if (!check_type_array_assignable(prop->type)) {
      zend_throw_auto_init_in_ref_error(prop);
      return 0;
    }
  } ZEND_REF_FOREACH_TYPE_SOURCES_END();
  return 1;
}

static zend_never_inline bool zend_handle_fetch_obj_flags(
    zval *result, zval *ptr, zend_object *obj, zend_property_info *prop_info, uint32_t flags)
{
  switch (flags) {
    case ZEND_FETCH_DIM_WRITE:
      if (promotes_to_array(ptr)) {
        if (!prop_info) {
          break;
        }
        if (!check_type_array_assignable(prop_info->type)) {
          zend_throw_auto_init_in_prop_error(prop_info);
          if (result) ZVAL_ERROR(result);
          return 0;
        }
      }
      break;
    case ZEND_FETCH_REF:
      if (Z_TYPE_P(ptr) != IS_REFERENCE) {
        if (!prop_info) {
          break;
        }
        if (Z_TYPE_P(ptr) == IS_UNDEF) {
          if (!ZEND_TYPE_ALLOW_NULL(prop_info->type)) {
            zend_throw_access_uninit_prop_by_ref_error(prop_info);
            if (result) ZVAL_ERROR(result);
            return 0;
          }
          ZVAL_NULL(ptr);
        }

        ZVAL_NEW_REF(ptr, ptr);
        ZEND_REF_ADD_TYPE_SOURCE(Z_REF_P(ptr), prop_info);
      }
      break;
    EMPTY_SWITCH_DEFAULT_CASE()
  }
  return 1;
}

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, uint32_t flags, zend_property_info **prop_info_p OPLINE_DC EXECUTE_DATA_DC)
{
  zval *ptr;
  zend_object *zobj;
  zend_string *name, *tmp_name;
  void *_cache_slot[3] = {0};
  if (prop_op_type != IS_CONST) {
    cache_slot = _cache_slot;
  } else {
    ZEND_ASSERT(cache_slot);
  }

  if (container_op_type != IS_UNUSED && UNEXPECTED(Z_TYPE_P(container) != IS_OBJECT)) {
    do {
      if (Z_ISREF_P(container) && Z_TYPE_P(Z_REFVAL_P(container)) == IS_OBJECT) {
        container = Z_REFVAL_P(container);
        break;
      }

      if (container_op_type == IS_CV
       && type != BP_VAR_W
       && UNEXPECTED(Z_TYPE_P(container) == IS_UNDEF)) {
        ZVAL_UNDEFINED_OP1();
      }

      /* this should modify object only if it's empty */
      if (type == BP_VAR_UNSET) {
        ZVAL_NULL(result);
        return;
      }

      zend_throw_non_object_error(container, prop_ptr OPLINE_CC EXECUTE_DATA_CC);
      ZVAL_ERROR(result);
      return;
    } while (0);
  }

  zobj = Z_OBJ_P(container);
  if (prop_op_type == IS_CONST &&
      EXPECTED(zobj->ce == CACHED_PTR_EX(cache_slot))) {
    uintptr_t prop_offset = (uintptr_t)CACHED_PTR_EX(cache_slot + 1);
    if (prop_info_p) {
      *prop_info_p = CACHED_PTR_EX(cache_slot + 2);
    }

    if (EXPECTED(IS_VALID_PROPERTY_OFFSET(prop_offset))) {
      ptr = OBJ_PROP(zobj, prop_offset);
      if (EXPECTED(Z_TYPE_P(ptr) != IS_UNDEF)) {
        ZVAL_INDIRECT(result, ptr);
        zend_property_info *prop_info = CACHED_PTR_EX(cache_slot + 2);
        if (prop_info) {
          if (UNEXPECTED(prop_info->flags & (ZEND_ACC_READONLY|ZEND_ACC_PPP_SET_MASK))
           && ((prop_info->flags & ZEND_ACC_READONLY) || !zend_asymmetric_property_has_set_access(prop_info))) {
            /* For objects, W/RW/UNSET fetch modes might not actually modify object.
             * Similar as with magic __get() allow them, but return the value as a copy
             * to make sure no actual modification is possible. */
            ZEND_ASSERT(type == BP_VAR_W || type == BP_VAR_RW || type == BP_VAR_UNSET);
            if (Z_TYPE_P(ptr) == IS_OBJECT) {
              ZVAL_COPY(result, ptr);
            } else {
              if (prop_info->flags & ZEND_ACC_READONLY) {
                zend_readonly_property_indirect_modification_error(prop_info);
              } else {
                zend_asymmetric_visibility_property_modification_error(prop_info, "indirectly modify");
              }
              ZVAL_ERROR(result);
            }
            return;
          }
          flags &= ZEND_FETCH_OBJ_FLAGS;
          if (flags) {
            zend_handle_fetch_obj_flags(result, ptr, NULL, prop_info, flags);
          }
        }
        return;
      }
    } else if (UNEXPECTED(IS_HOOKED_PROPERTY_OFFSET(prop_offset))) {
      /* Fall through to read_property for hooks. */
    } else if (EXPECTED(zobj->properties != NULL)) {
      ZEND_ASSERT(IS_DYNAMIC_PROPERTY_OFFSET(prop_offset));
      if (UNEXPECTED(GC_REFCOUNT(zobj->properties) > 1)) {
        if (EXPECTED(!(GC_FLAGS(zobj->properties) & IS_ARRAY_IMMUTABLE))) {
          GC_DELREF(zobj->properties);
        }
        zobj->properties = zend_array_dup(zobj->properties);
      }
      ptr = zend_hash_find_known_hash(zobj->properties, Z_STR_P(prop_ptr));
      if (EXPECTED(ptr)) {
        ZVAL_INDIRECT(result, ptr);
        return;
      }
    }
  } else if (prop_op_type == IS_CONST) {
    /* CE mismatch, make cache slot consistent */
    cache_slot[0] = cache_slot[1] = cache_slot[2] = NULL;
  }

  /* Pointer on property callback is required */
  ZEND_ASSERT(zobj->handlers->get_property_ptr_ptr != NULL);

  if (prop_op_type == IS_CONST) {
    name = Z_STR_P(prop_ptr);
  } else {
    name = zval_get_tmp_string(prop_ptr, &tmp_name);
  }
  ptr = zobj->handlers->get_property_ptr_ptr(zobj, name, type, cache_slot);
  if (NULL == ptr) {
    ptr = zobj->handlers->read_property(zobj, name, type, cache_slot, result);
    if (ptr == result) {
      if (UNEXPECTED(Z_ISREF_P(ptr) && Z_REFCOUNT_P(ptr) == 1)) {
        ZVAL_UNREF(ptr);
      }
      goto end;
    }
    if (UNEXPECTED(EG(exception))) {
      ZVAL_ERROR(result);
      goto end;
    }
  } else if (UNEXPECTED(Z_ISERROR_P(ptr))) {
    ZVAL_ERROR(result);
    goto end;
  } else if (type == BP_VAR_UNSET && UNEXPECTED(Z_TYPE_P(ptr) == IS_UNDEF)) {
    ZVAL_NULL(result);
    goto end;
  }

  ZVAL_INDIRECT(result, ptr);
  flags &= ZEND_FETCH_OBJ_FLAGS;
  if (flags) {
    zend_property_info *prop_info = CACHED_PTR_EX(cache_slot + 2);
    if (prop_info && ZEND_TYPE_IS_SET(prop_info->type)) {
      if (UNEXPECTED(!zend_handle_fetch_obj_flags(result, ptr, NULL, prop_info, flags))) {
        goto end;
      }
    }
  }

end:
  if (prop_info_p) {
    *prop_info_p = CACHED_PTR_EX(cache_slot + 2);
  }
  if (prop_op_type != IS_CONST) {
    zend_tmp_string_release(tmp_name);
  }
}

static zend_always_inline void zend_assign_to_property_reference(zval *container, uint32_t container_op_type, zval *prop_ptr, uint32_t prop_op_type, zval *value_ptr OPLINE_DC EXECUTE_DATA_DC)
{
  zval variable, *variable_ptr = &variable;
  void **cache_addr = (prop_op_type == IS_CONST) ? CACHE_ADDR(opline->extended_value & ~ZEND_RETURNS_FUNCTION) : NULL;
  zend_refcounted *garbage = NULL;
  zend_property_info *prop_info = NULL;

  zend_fetch_property_address(variable_ptr, container, container_op_type, prop_ptr, prop_op_type,
    cache_addr, BP_VAR_W, 0, &prop_info OPLINE_CC EXECUTE_DATA_CC);

  if (EXPECTED(Z_TYPE_P(variable_ptr) == IS_INDIRECT)) {
    variable_ptr = Z_INDIRECT_P(variable_ptr);
    if (/*OP_DATA_TYPE == IS_VAR &&*/
           (opline->extended_value & ZEND_RETURNS_FUNCTION) &&
           UNEXPECTED(!Z_ISREF_P(value_ptr))) {

      variable_ptr = zend_wrong_assign_to_variable_reference(
        variable_ptr, value_ptr, &garbage OPLINE_CC EXECUTE_DATA_CC);
    } else if (prop_info && ZEND_TYPE_IS_SET(prop_info->type)) {
      variable_ptr = zend_assign_to_typed_property_reference(prop_info, variable_ptr, value_ptr, &garbage EXECUTE_DATA_CC);
    } else {
      zend_assign_to_variable_reference(variable_ptr, value_ptr, &garbage);
    }
  } else if (Z_ISERROR_P(variable_ptr)) {
    variable_ptr = &EG(uninitialized_zval);
  } else {
    zend_throw_error(NULL, "Cannot assign by reference to overloaded object");
    zval_ptr_dtor(&variable);
    variable_ptr = &EG(uninitialized_zval);
  }

  if (UNEXPECTED(RETURN_VALUE_USED(opline))) {
    ZVAL_COPY(EX_VAR(opline->result.var), variable_ptr);
  }
  if (garbage) {
    GC_DTOR(garbage);
  }
}

static zend_never_inline void zend_assign_to_property_reference_this_const(zval *container, zval *prop_ptr, zval *value_ptr OPLINE_DC EXECUTE_DATA_DC)
{
  zend_assign_to_property_reference(container, IS_UNUSED, prop_ptr, IS_CONST, value_ptr
    OPLINE_CC EXECUTE_DATA_CC);
}

static zend_never_inline void zend_assign_to_property_reference_var_const(zval *container, zval *prop_ptr, zval *value_ptr OPLINE_DC EXECUTE_DATA_DC)
{
  zend_assign_to_property_reference(container, IS_VAR, prop_ptr, IS_CONST, value_ptr
    OPLINE_CC EXECUTE_DATA_CC);
}

static zend_never_inline void zend_assign_to_property_reference_this_var(zval *container, zval *prop_ptr, zval *value_ptr OPLINE_DC EXECUTE_DATA_DC)
{
  zend_assign_to_property_reference(container, IS_UNUSED, prop_ptr, IS_VAR, value_ptr
    OPLINE_CC EXECUTE_DATA_CC);
}

static zend_never_inline void zend_assign_to_property_reference_var_var(zval *container, zval *prop_ptr, zval *value_ptr OPLINE_DC EXECUTE_DATA_DC)
{
  zend_assign_to_property_reference(container, IS_VAR, prop_ptr, IS_VAR, value_ptr
    OPLINE_CC EXECUTE_DATA_CC);
}

static zend_never_inline zval* zend_fetch_static_property_address_ex(zend_property_info **prop_info, uint32_t cache_slot, int fetch_type OPLINE_DC EXECUTE_DATA_DC) {
  zval *result;
  zend_string *name;
  zend_class_entry *ce;
  zend_property_info *property_info;

  uint8_t op1_type = opline->op1_type, op2_type = opline->op2_type;

  if (EXPECTED(op2_type == IS_CONST)) {
    zval *class_name = RT_CONSTANT(opline, opline->op2);

    ZEND_ASSERT(op1_type != IS_CONST || CACHED_PTR(cache_slot) == NULL);

    if (EXPECTED((ce = CACHED_PTR(cache_slot)) == NULL)) {
      ce = zend_fetch_class_by_name(Z_STR_P(class_name), Z_STR_P(class_name + 1), ZEND_FETCH_CLASS_DEFAULT | ZEND_FETCH_CLASS_EXCEPTION);
      if (UNEXPECTED(ce == NULL)) {
        FREE_OP(op1_type, opline->op1.var);
        return NULL;
      }
      if (UNEXPECTED(op1_type != IS_CONST)) {
        CACHE_PTR(cache_slot, ce);
      }
    }
  } else {
    if (EXPECTED(op2_type == IS_UNUSED)) {
      ce = zend_fetch_class(NULL, opline->op2.num);
      if (UNEXPECTED(ce == NULL)) {
        FREE_OP(op1_type, opline->op1.var);
        return NULL;
      }
    } else {
      ce = Z_CE_P(EX_VAR(opline->op2.var));
    }
    if (EXPECTED(op1_type == IS_CONST) && EXPECTED(CACHED_PTR(cache_slot) == ce)) {
      result = CACHED_PTR(cache_slot + sizeof(void *));
      *prop_info = CACHED_PTR(cache_slot + sizeof(void *) * 2);
      return result;
    }
  }

  if (EXPECTED(op1_type == IS_CONST)) {
    name = Z_STR_P(RT_CONSTANT(opline, opline->op1));
    result = zend_std_get_static_property_with_info(ce, name, fetch_type, &property_info);
  } else {
    zend_string *tmp_name;
    zval *varname = get_zval_ptr_undef(opline->op1_type, opline->op1, BP_VAR_R);
    if (EXPECTED(Z_TYPE_P(varname) == IS_STRING)) {
      name = Z_STR_P(varname);
      tmp_name = NULL;
    } else {
      if (op1_type == IS_CV && UNEXPECTED(Z_TYPE_P(varname) == IS_UNDEF)) {
        zval_undefined_cv(opline->op1.var EXECUTE_DATA_CC);
      }
      name = zval_get_tmp_string(varname, &tmp_name);
    }
    result = zend_std_get_static_property_with_info(ce, name, fetch_type, &property_info);

    zend_tmp_string_release(tmp_name);

    FREE_OP(op1_type, opline->op1.var);
  }

  if (UNEXPECTED(result == NULL)) {
    return NULL;
  }

  if (UNEXPECTED(Z_TYPE_P(result) == IS_UNDEF)
   && (fetch_type == BP_VAR_IS || fetch_type == BP_VAR_UNSET)) {
    return NULL;
   }

  *prop_info = property_info;

  if (EXPECTED(op1_type == IS_CONST)
      && EXPECTED(!(property_info->ce->ce_flags & ZEND_ACC_TRAIT))) {
    CACHE_POLYMORPHIC_PTR(cache_slot, ce, result);
    CACHE_PTR(cache_slot + sizeof(void *) * 2, property_info);
  }

  return result;
}


static zend_always_inline zval* zend_fetch_static_property_address(zend_property_info **prop_info, uint32_t cache_slot, int fetch_type, int flags OPLINE_DC EXECUTE_DATA_DC) {
  zval *result;
  zend_property_info *property_info;

  if (opline->op1_type == IS_CONST
   && (opline->op2_type == IS_CONST
    || (opline->op2_type == IS_UNUSED
     && ((opline->op2.num & ZEND_FETCH_CLASS_MASK) == ZEND_FETCH_CLASS_SELF
      || (opline->op2.num & ZEND_FETCH_CLASS_MASK) == ZEND_FETCH_CLASS_PARENT)))
   && EXPECTED(CACHED_PTR(cache_slot + sizeof(void *)) != NULL)) {
    result = CACHED_PTR(cache_slot + sizeof(void *));
    property_info = CACHED_PTR(cache_slot + sizeof(void *) * 2);

    if ((fetch_type == BP_VAR_R || fetch_type == BP_VAR_RW)
        && UNEXPECTED(Z_TYPE_P(result) == IS_UNDEF)
        && ZEND_TYPE_IS_SET(property_info->type)) {
      zend_throw_error(NULL, "Typed static property %s::$%s must not be accessed before initialization",
        ZSTR_VAL(property_info->ce->name),
        zend_get_unmangled_property_name(property_info->name));
      return NULL;
    }
  } else {
    result = zend_fetch_static_property_address_ex(&property_info, cache_slot, fetch_type OPLINE_CC EXECUTE_DATA_CC);
    if (UNEXPECTED(!result)) {
      return NULL;
    }
  }

  flags &= ZEND_FETCH_OBJ_FLAGS;
  if (flags && ZEND_TYPE_IS_SET(property_info->type)) {
    zend_handle_fetch_obj_flags(NULL, result, NULL, property_info, flags);
  }

  if (prop_info) {
    *prop_info = property_info;
  }

  return result;
}

ZEND_API zval* ZEND_FASTCALL zend_fetch_static_property(zend_execute_data *ex, int fetch_type) {
  zval *result;
  zend_property_info *property_info;
#if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
  zend_execute_data *orig_execute_data = execute_data;
#else
  zend_execute_data *execute_data;
#endif
  execute_data = ex;
#if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
  const zend_op *orig_opline = opline;
#else
  const zend_op *opline;
#endif
  opline = execute_data->opline;

  uint32_t cache_slot = opline->extended_value & ~ZEND_FETCH_OBJ_FLAGS;
  uint32_t flags = 0;

  if (fetch_type == BP_VAR_W) {
    flags = opline->extended_value & ZEND_FETCH_OBJ_FLAGS;
  }
  result = zend_fetch_static_property_address_ex(&property_info, cache_slot, fetch_type OPLINE_CC EXECUTE_DATA_CC);
  if (EXPECTED(result)) {
    if (flags && ZEND_TYPE_IS_SET(property_info->type)) {
      zend_handle_fetch_obj_flags(NULL, result, NULL, property_info, flags);
    }
  } else {
    result = &EG(uninitialized_zval);
  }

#if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
  EX(opline) = opline;
  opline = orig_opline;
#endif
#if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
  execute_data = orig_execute_data;
#endif

  return result;
}

ZEND_API ZEND_COLD void zend_throw_ref_type_error_type(const zend_property_info *prop1, const zend_property_info *prop2, const zval *zv) {
  zend_string *type1_str = zend_type_to_string(prop1->type);
  zend_string *type2_str = zend_type_to_string(prop2->type);
  zend_type_error("Reference with value of type %s held by property %s::$%s of type %s is not compatible with property %s::$%s of type %s",
    zend_zval_type_name(zv),
    ZSTR_VAL(prop1->ce->name),
    zend_get_unmangled_property_name(prop1->name),
    ZSTR_VAL(type1_str),
    ZSTR_VAL(prop2->ce->name),
    zend_get_unmangled_property_name(prop2->name),
    ZSTR_VAL(type2_str)
  );
  zend_string_release(type1_str);
  zend_string_release(type2_str);
}

ZEND_API ZEND_COLD void zend_throw_ref_type_error_zval(const zend_property_info *prop, const zval *zv) {
  zend_string *type_str = zend_type_to_string(prop->type);
  zend_type_error("Cannot assign %s to reference held by property %s::$%s of type %s",
    zend_zval_value_name(zv),
    ZSTR_VAL(prop->ce->name),
    zend_get_unmangled_property_name(prop->name),
    ZSTR_VAL(type_str)
  );
  zend_string_release(type_str);
}

ZEND_API ZEND_COLD void zend_throw_conflicting_coercion_error(const zend_property_info *prop1, const zend_property_info *prop2, const zval *zv) {
  zend_string *type1_str = zend_type_to_string(prop1->type);
  zend_string *type2_str = zend_type_to_string(prop2->type);
  zend_type_error("Cannot assign %s to reference held by property %s::$%s of type %s and property %s::$%s of type %s, as this would result in an inconsistent type conversion",
    zend_zval_value_name(zv),
    ZSTR_VAL(prop1->ce->name),
    zend_get_unmangled_property_name(prop1->name),
    ZSTR_VAL(type1_str),
    ZSTR_VAL(prop2->ce->name),
    zend_get_unmangled_property_name(prop2->name),
    ZSTR_VAL(type2_str)
  );
  zend_string_release(type1_str);
  zend_string_release(type2_str);
}

/* 1: valid, 0: invalid, -1: may be valid after type coercion */
static zend_always_inline int i_zend_verify_type_assignable_zval(
    const zend_property_info *info, const zval *zv, bool strict) {
  zend_type type = info->type;
  uint32_t type_mask;
  uint8_t zv_type = Z_TYPE_P(zv);

  if (EXPECTED(ZEND_TYPE_CONTAINS_CODE(type, zv_type))) {
    return 1;
  }

  if (ZEND_TYPE_IS_COMPLEX(type) && zv_type == IS_OBJECT
      && zend_check_and_resolve_property_or_class_constant_class_type(info->ce, info->type, Z_OBJCE_P(zv))) {
    return 1;
  }

  type_mask = ZEND_TYPE_FULL_MASK(type);
  ZEND_ASSERT(!(type_mask & (MAY_BE_CALLABLE|MAY_BE_STATIC)));

  /* SSTH Exception: IS_LONG may be accepted as IS_DOUBLE (converted) */
  if (strict) {
    if ((type_mask & MAY_BE_DOUBLE) && zv_type == IS_LONG) {
      return -1;
    }
    return 0;
  }

  /* NULL may be accepted only by nullable hints (this is already checked) */
  if (zv_type == IS_NULL) {
    return 0;
  }

  /* Does not contain any type to which a coercion is possible */
  if (!(type_mask & (MAY_BE_LONG|MAY_BE_DOUBLE|MAY_BE_STRING))
      && (type_mask & MAY_BE_BOOL) != MAY_BE_BOOL) {
    return 0;
  }

  /* Coercion may be necessary, check separately */
  return -1;
}

ZEND_API bool ZEND_FASTCALL zend_verify_ref_assignable_zval(zend_reference *ref, zval *zv, bool strict)
{
  const zend_property_info *prop;

  /* The value must satisfy each property type, and coerce to the same value for each property
   * type. Remember the first coerced type and value we've seen for this purpose. */
  const zend_property_info *first_prop = NULL;
  zval coerced_value;
  ZVAL_UNDEF(&coerced_value);

  ZEND_ASSERT(Z_TYPE_P(zv) != IS_REFERENCE);
  ZEND_REF_FOREACH_TYPE_SOURCES(ref, prop) {
    int result = i_zend_verify_type_assignable_zval(prop, zv, strict);
    if (result == 0) {
type_error:
      zend_throw_ref_type_error_zval(prop, zv);
      zval_ptr_dtor(&coerced_value);
      return 0;
    }

    if (result < 0) {
      if (!first_prop) {
        first_prop = prop;
        ZVAL_COPY(&coerced_value, zv);
        if (!zend_verify_weak_scalar_type_hint(
            ZEND_TYPE_FULL_MASK(prop->type), &coerced_value)) {
          goto type_error;
        }
      } else if (Z_ISUNDEF(coerced_value)) {
        /* A previous property did not require coercion, but this one does,
         * so they are incompatible. */
        goto conflicting_coercion_error;
      } else {
        zval tmp;
        ZVAL_COPY(&tmp, zv);
        if (!zend_verify_weak_scalar_type_hint(ZEND_TYPE_FULL_MASK(prop->type), &tmp)) {
          zval_ptr_dtor(&tmp);
          goto type_error;
        }
        if (!zend_is_identical(&coerced_value, &tmp)) {
          zval_ptr_dtor(&tmp);
          goto conflicting_coercion_error;
        }
        zval_ptr_dtor(&tmp);
      }
    } else {
      if (!first_prop) {
        first_prop = prop;
      } else if (!Z_ISUNDEF(coerced_value)) {
        /* A previous property required coercion, but this one doesn't,
         * so they are incompatible. */
conflicting_coercion_error:
        zend_throw_conflicting_coercion_error(first_prop, prop, zv);
        zval_ptr_dtor(&coerced_value);
        return 0;
      }
    }
  } ZEND_REF_FOREACH_TYPE_SOURCES_END();

  if (!Z_ISUNDEF(coerced_value)) {
    zval_ptr_dtor(zv);
    ZVAL_COPY_VALUE(zv, &coerced_value);
  }

  return 1;
}

static zend_always_inline void i_zval_ptr_dtor_noref(zval *zval_ptr) {
  if (Z_REFCOUNTED_P(zval_ptr)) {
    zend_refcounted *ref = Z_COUNTED_P(zval_ptr);
    ZEND_ASSERT(Z_TYPE_P(zval_ptr) != IS_REFERENCE);
    GC_DTOR_NO_REF(ref);
  }
}

ZEND_API zval* zend_assign_to_typed_ref_ex(zval *variable_ptr, zval *orig_value, uint8_t value_type, bool strict, zend_refcounted **garbage_ptr)
{
  bool ret;
  zval value;
  zend_refcounted *ref = NULL;

  if (Z_ISREF_P(orig_value)) {
    ref = Z_COUNTED_P(orig_value);
    orig_value = Z_REFVAL_P(orig_value);
  }

  ZVAL_COPY(&value, orig_value);
  ret = zend_verify_ref_assignable_zval(Z_REF_P(variable_ptr), &value, strict);
  variable_ptr = Z_REFVAL_P(variable_ptr);
  if (EXPECTED(ret)) {
    if (Z_REFCOUNTED_P(variable_ptr)) {
      *garbage_ptr = Z_COUNTED_P(variable_ptr);
    }
    ZVAL_COPY_VALUE(variable_ptr, &value);
  } else {
    zval_ptr_dtor_nogc(&value);
  }
  if (value_type & (IS_VAR|IS_TMP_VAR)) {
    if (UNEXPECTED(ref)) {
      if (UNEXPECTED(GC_DELREF(ref) == 0)) {
        zval_ptr_dtor(orig_value);
        efree_size(ref, sizeof(zend_reference));
      }
    } else {
      i_zval_ptr_dtor_noref(orig_value);
    }
  }
  return variable_ptr;
}

ZEND_API zval* zend_assign_to_typed_ref(zval *variable_ptr, zval *orig_value, uint8_t value_type, bool strict)
{
  zend_refcounted *garbage = NULL;
  zval *result = zend_assign_to_typed_ref_ex(variable_ptr, orig_value, value_type, strict, &garbage);
  if (garbage) {
    GC_DTOR_NO_REF(garbage);
  }
  return result;
}

ZEND_API bool ZEND_FASTCALL zend_verify_prop_assignable_by_ref_ex(const zend_property_info *prop_info, zval *orig_val, bool strict, zend_verify_prop_assignable_by_ref_context context) {
  zval *val = orig_val;
  if (Z_ISREF_P(val) && ZEND_REF_HAS_TYPE_SOURCES(Z_REF_P(val))) {
    int result;

    val = Z_REFVAL_P(val);
    result = i_zend_verify_type_assignable_zval(prop_info, val, strict);
    if (result > 0) {
      return 1;
    }

    if (result < 0) {
      /* This is definitely an error, but we still need to determined why: Either because
       * the value is simply illegal for the type, or because or a conflicting coercion. */
      zval tmp;
      ZVAL_COPY(&tmp, val);
      if (zend_verify_weak_scalar_type_hint(ZEND_TYPE_FULL_MASK(prop_info->type), &tmp)) {
        const zend_property_info *ref_prop = ZEND_REF_FIRST_SOURCE(Z_REF_P(orig_val));
        zend_throw_ref_type_error_type(ref_prop, prop_info, val);
        zval_ptr_dtor(&tmp);
        return 0;
      }
      zval_ptr_dtor(&tmp);
    }
  } else {
    ZVAL_DEREF(val);
    if (i_zend_check_property_type(prop_info, val, strict)) {
      return 1;
    }
  }

  if (EXPECTED(context == ZEND_VERIFY_PROP_ASSIGNABLE_BY_REF_CONTEXT_ASSIGNMENT)) {
    zend_verify_property_type_error(prop_info, val);
  } else {
    ZEND_ASSERT(context == ZEND_VERIFY_PROP_ASSIGNABLE_BY_REF_CONTEXT_MAGIC_GET);
    zend_magic_get_property_type_inconsistency_error(prop_info, val);
  }

  return 0;
}

ZEND_API bool ZEND_FASTCALL zend_verify_prop_assignable_by_ref(const zend_property_info *prop_info, zval *orig_val, bool strict) {
  return zend_verify_prop_assignable_by_ref_ex(prop_info, orig_val, strict, ZEND_VERIFY_PROP_ASSIGNABLE_BY_REF_CONTEXT_ASSIGNMENT);
}

ZEND_API void ZEND_FASTCALL zend_ref_add_type_source(zend_property_info_source_list *source_list, zend_property_info *prop)
{
  zend_property_info_list *list;
  if (source_list->ptr == NULL) {
    source_list->ptr = prop;
    return;
  }

  list = ZEND_PROPERTY_INFO_SOURCE_TO_LIST(source_list->list);
  if (!ZEND_PROPERTY_INFO_SOURCE_IS_LIST(source_list->list)) {
    list = emalloc(sizeof(zend_property_info_list) + (4 - 1) * sizeof(zend_property_info *));
    list->ptr[0] = source_list->ptr;
    list->num_allocated = 4;
    list->num = 1;
  } else if (list->num_allocated == list->num) {
    list->num_allocated = list->num * 2;
    list = erealloc(list, sizeof(zend_property_info_list) + (list->num_allocated - 1) * sizeof(zend_property_info *));
  }

  list->ptr[list->num++] = prop;
  source_list->list = ZEND_PROPERTY_INFO_SOURCE_FROM_LIST(list);
}

ZEND_API void ZEND_FASTCALL zend_ref_del_type_source(zend_property_info_source_list *source_list, const zend_property_info *prop)
{
  zend_property_info_list *list = ZEND_PROPERTY_INFO_SOURCE_TO_LIST(source_list->list);
  zend_property_info **ptr, **end;

  ZEND_ASSERT(prop);
  if (!ZEND_PROPERTY_INFO_SOURCE_IS_LIST(source_list->list)) {
    ZEND_ASSERT(source_list->ptr == prop);
    source_list->ptr = NULL;
    return;
  }

  if (list->num == 1) {
    ZEND_ASSERT(*list->ptr == prop);
    efree(list);
    source_list->ptr = NULL;
    return;
  }

  /* Checking against end here to get a more graceful failure mode if we missed adding a type
   * source at some point. */
  ptr = list->ptr;
  end = ptr + list->num;
  while (ptr < end && *ptr != prop) {
    ptr++;
  }
  ZEND_ASSERT(*ptr == prop);

  /* Copy the last list element into the deleted slot. */
  *ptr = list->ptr[--list->num];

  if (list->num >= 4 && list->num * 4 == list->num_allocated) {
    list->num_allocated = list->num * 2;
    source_list->list = ZEND_PROPERTY_INFO_SOURCE_FROM_LIST(erealloc(list, sizeof(zend_property_info_list) + (list->num_allocated - 1) * sizeof(zend_property_info *)));
  }
}

static zend_never_inline void zend_fetch_this_var(int type OPLINE_DC EXECUTE_DATA_DC)
{
  zval *result = EX_VAR(opline->result.var);

  switch (type) {
    case BP_VAR_R:
      if (EXPECTED(Z_TYPE(EX(This)) == IS_OBJECT)) {
        ZVAL_OBJ(result, Z_OBJ(EX(This)));
        Z_ADDREF_P(result);
      } else {
        ZVAL_NULL(result);
        zend_error_unchecked(E_WARNING, "Undefined variable $this");
      }
      break;
    case BP_VAR_IS:
      if (EXPECTED(Z_TYPE(EX(This)) == IS_OBJECT)) {
        ZVAL_OBJ(result, Z_OBJ(EX(This)));
        Z_ADDREF_P(result);
      } else {
        ZVAL_NULL(result);
      }
      break;
    case BP_VAR_RW:
    case BP_VAR_W:
      ZVAL_UNDEF(result);
      zend_throw_error(NULL, "Cannot re-assign $this");
      break;
    case BP_VAR_UNSET:
      ZVAL_UNDEF(result);
      zend_throw_error(NULL, "Cannot unset $this");
      break;
    EMPTY_SWITCH_DEFAULT_CASE()
  }
}

#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 void 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);
  }
}


#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) /* {{{ */
{
  /* Clean before putting into the cache, since clean could call dtors,
   * which could use the cached hash. Also do this before the check for
   * available cache slots, as those may be used by a dtor as well. */
  zend_symtable_clean(symbol_table);
  if (EG(symtable_cache_ptr) >= EG(symtable_cache_limit)) {
    zend_array_destroy(symbol_table);
  } else {
    *(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);
  int count = EX(func)->op_array.last_var;
  while (EXPECTED(count != 0)) {
    i_zval_ptr_dtor(cv);
    cv++;
    count--;
  }
}
/* }}} */

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

ZEND_API ZEND_COLD void ZEND_FASTCALL zend_fcall_interrupt(zend_execute_data *call)
{
  zend_atomic_bool_store_ex(&EG(vm_interrupt), false);
  if (zend_atomic_bool_load_ex(&EG(timed_out))) {
    zend_timeout();
  } else if (zend_interrupt_function) {
    zend_interrupt_function(call);
  }
}

#define ZEND_VM_INTERRUPT_CHECK() do { \
    if (UNEXPECTED(zend_atomic_bool_load_ex(&EG(vm_interrupt)))) { \
      ZEND_VM_INTERRUPT(); \
    } \
  } while (0)

#define ZEND_VM_LOOP_INTERRUPT_CHECK() do { \
    if (UNEXPECTED(zend_atomic_bool_load_ex(&EG(vm_interrupt)))) { \
      ZEND_VM_LOOP_INTERRUPT(); \
    } \
  } while (0)

#define ZEND_VM_FCALL_INTERRUPT_CHECK(call) do { \
    if (UNEXPECTED(zend_atomic_bool_load_ex(&EG(vm_interrupt)))) { \
      zend_fcall_interrupt(call); \
    } \
  } while (0)

/*
 * Stack Frame Layout (the whole stack frame is allocated at once)
 * ==================
 *
 *                             +========================================+
 * EG(current_execute_data) -> | zend_execute_data                      |
 *                             +----------------------------------------+
 *     EX_VAR_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)                  |
 *                             | ...                                    |
 *                             +----------------------------------------+
 */

/* zend_copy_extra_args is used when the actually passed number of arguments
 * (EX_NUM_ARGS) is greater than what the function defined (op_array->num_args).
 *
 * The extra arguments will be copied into the call frame after all the compiled variables.
 *
 * If there are extra arguments copied, a flag "ZEND_CALL_FREE_EXTRA_ARGS" will be set
 * on the zend_execute_data, and when the executor leaves the function, the
 * args will be freed in zend_leave_helper.
 */
static zend_never_inline void zend_copy_extra_args(EXECUTE_DATA_D)
{
  const zend_op_array *op_array = &EX(func)->op_array;
  uint32_t first_extra_arg = op_array->num_args;
  uint32_t num_args = EX_NUM_ARGS();
  zval *src;
  size_t delta;
  uint32_t count;
  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 */
#if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
    opline += first_extra_arg;
#else
    EX(opline) += first_extra_arg;
#endif

  }

  /* move extra args into separate array after all CV and TMP vars */
  src = EX_VAR_NUM(num_args - 1);
  delta = op_array->last_var + op_array->T - first_extra_arg;
  count = num_args - first_extra_arg;
  if (EXPECTED(delta != 0)) {
    delta *= sizeof(zval);
    do {
      type_flags |= Z_TYPE_INFO_P(src);
      ZVAL_COPY_VALUE((zval*)(((char*)src) + delta), src);
      ZVAL_UNDEF(src);
      src--;
    } while (--count);
    if (Z_TYPE_INFO_REFCOUNTED(type_flags)) {
      ZEND_ADD_CALL_FLAG(execute_data, ZEND_CALL_FREE_EXTRA_ARGS);
    }
  } else {
    do {
      if (Z_REFCOUNTED_P(src)) {
        ZEND_ADD_CALL_FLAG(execute_data, ZEND_CALL_FREE_EXTRA_ARGS);
        break;
      }
      src--;
    } while (--count);
  }
}

static zend_always_inline void zend_init_cvs(uint32_t first, uint32_t last EXECUTE_DATA_DC)
{
  if (EXPECTED(first < last)) {
    uint32_t count = last - first;
    zval *var = EX_VAR_NUM(first);

    do {
      ZVAL_UNDEF(var);
      var++;
    } while (--count);
  }
}

static zend_always_inline void i_init_func_execute_data(zend_op_array *op_array, zval *return_value, bool may_be_trampoline EXECUTE_DATA_DC) /* {{{ */
{
  uint32_t first_extra_arg, num_args;
  ZEND_ASSERT(EX(func) == (zend_function*)op_array);

#if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
  opline = op_array->opcodes;
#else
  EX(opline) = op_array->opcodes;
#endif
  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 (!may_be_trampoline || EXPECTED(!(op_array->fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE))) {
      zend_copy_extra_args(EXECUTE_DATA_C);
    }
  } else if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
    /* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
#if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
    opline += num_args;
#else
    EX(opline) += num_args;
#endif
  }

  /* Initialize CV variables (skip arguments) */
  zend_init_cvs(num_args, op_array->last_var EXECUTE_DATA_CC);

  EX(run_time_cache) = RUN_TIME_CACHE(op_array);

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

static zend_always_inline void init_func_run_time_cache_i(zend_op_array *op_array) /* {{{ */
{
  void **run_time_cache;

  ZEND_ASSERT(RUN_TIME_CACHE(op_array) == NULL);
  run_time_cache = zend_arena_alloc(&CG(arena), op_array->cache_size);
  memset(run_time_cache, 0, op_array->cache_size);
  ZEND_MAP_PTR_SET(op_array->run_time_cache, run_time_cache);
}
/* }}} */

static zend_never_inline void ZEND_FASTCALL init_func_run_time_cache(zend_op_array *op_array) /* {{{ */
{
  init_func_run_time_cache_i(op_array);
}
/* }}} */

ZEND_API zend_function * ZEND_FASTCALL zend_fetch_function(zend_string *name) /* {{{ */
{
  zval *zv = zend_hash_find(EG(function_table), name);

  if (EXPECTED(zv != NULL)) {
    zend_function *fbc = Z_FUNC_P(zv);

    if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!RUN_TIME_CACHE(&fbc->op_array))) {
      init_func_run_time_cache_i(&fbc->op_array);
    }
    return fbc;
  }
  return NULL;
} /* }}} */

ZEND_API zend_function * ZEND_FASTCALL zend_fetch_function_str(const char *name, size_t len) /* {{{ */
{
  zval *zv = zend_hash_str_find(EG(function_table), name, len);

  if (EXPECTED(zv != NULL)) {
    zend_function *fbc = Z_FUNC_P(zv);

    if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!RUN_TIME_CACHE(&fbc->op_array))) {
      init_func_run_time_cache_i(&fbc->op_array);
    }
    return fbc;
  }
  return NULL;
} /* }}} */

ZEND_API void ZEND_FASTCALL zend_init_func_run_time_cache(zend_op_array *op_array) /* {{{ */
{
  if (!RUN_TIME_CACHE(op_array)) {
    init_func_run_time_cache_i(op_array);
  }
} /* }}} */

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 (op_array->last_var) {
    zend_attach_symbol_table(execute_data);
  }

  if (!ZEND_MAP_PTR(op_array->run_time_cache)) {
    void *ptr;

    ZEND_ASSERT(op_array->fn_flags & ZEND_ACC_HEAP_RT_CACHE);
    ptr = emalloc(op_array->cache_size);
    ZEND_MAP_PTR_INIT(op_array->run_time_cache, ptr);
    memset(ptr, 0, op_array->cache_size);
  }
  EX(run_time_cache) = RUN_TIME_CACHE(op_array);

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

ZEND_API void zend_init_func_execute_data(zend_execute_data *ex, zend_op_array *op_array, zval *return_value) /* {{{ */
{
#if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
  zend_execute_data *orig_execute_data = execute_data;
#endif
#if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
  const zend_op *orig_opline = opline;
#endif
#if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
  execute_data = ex;
#else
  zend_execute_data *execute_data = ex;
#endif

  EX(prev_execute_data) = EG(current_execute_data);
  if (!RUN_TIME_CACHE(op_array)) {
    init_func_run_time_cache(op_array);
  }
  i_init_func_execute_data(op_array, return_value, 1 EXECUTE_DATA_CC);

#if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
  EX(opline) = opline;
  opline = orig_opline;
#endif
#if defined(ZEND_VM_FP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
  execute_data = orig_execute_data;
#endif
}
/* }}} */

ZEND_API void zend_init_code_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_code_execute_data(execute_data, op_array, return_value);
}
/* }}} */

ZEND_API void zend_init_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
{
  if (EX_CALL_INFO() & ZEND_CALL_HAS_SYMBOL_TABLE) {
    zend_init_code_execute_data(execute_data, op_array, return_value);
  } else {
    zend_init_func_execute_data(execute_data, op_array, return_value);
  }
}
/* }}} */

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_ADD_CALL_FLAG(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 became 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 zend_generator *zend_get_running_generator(EXECUTE_DATA_D) /* {{{ */
{
  /* 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;
}
/* }}} */

ZEND_API void zend_unfinished_calls_gc(zend_execute_data *execute_data, zend_execute_data *call, uint32_t op_num, zend_get_gc_buffer *buf) /* {{{ */
{
  zend_op *opline = EX(func)->op_array.opcodes + op_num;
  int level;
  int do_exit;
  uint32_t num_args;

  if (UNEXPECTED(opline->opcode == ZEND_INIT_FCALL ||
    opline->opcode == ZEND_INIT_FCALL_BY_NAME ||
    opline->opcode == ZEND_INIT_NS_FCALL_BY_NAME ||
    opline->opcode == ZEND_INIT_DYNAMIC_CALL ||
    opline->opcode == ZEND_INIT_USER_CALL ||
    opline->opcode == ZEND_INIT_METHOD_CALL ||
    opline->opcode == ZEND_INIT_STATIC_METHOD_CALL ||
    opline->opcode == ZEND_NEW)) {
    ZEND_ASSERT(op_num);
    opline--;
  }

  do {
    /* find the number of actually passed arguments */
    level = 0;
    do_exit = 0;
    num_args = ZEND_CALL_NUM_ARGS(call);
    do {
      switch (opline->opcode) {
        case ZEND_DO_FCALL:
        case ZEND_DO_ICALL:
        case ZEND_DO_UCALL:
        case ZEND_DO_FCALL_BY_NAME:
        case ZEND_CALLABLE_CONVERT:
          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) {
            num_args = 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_FUNC_ARG:
        case ZEND_SEND_REF:
        case ZEND_SEND_VAR_NO_REF:
        case ZEND_SEND_VAR_NO_REF_EX:
        case ZEND_SEND_USER:
          if (level == 0) {
            /* For named args, the number of arguments is up to date. */
            if (opline->op2_type != IS_CONST) {
              num_args = opline->op2.num;
            }
            do_exit = 1;
          }
          break;
        case ZEND_SEND_ARRAY:
        case ZEND_SEND_UNPACK:
        case ZEND_CHECK_UNDEF_ARGS:
          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:
          case ZEND_CALLABLE_CONVERT:
            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);
    }

    if (EXPECTED(num_args > 0)) {
      zval *p = ZEND_CALL_ARG(call, 1);
      do {
        zend_get_gc_buffer_add_zval(buf, p);
        p++;
      } while (--num_args);
    }
    if (ZEND_CALL_INFO(call) & ZEND_CALL_RELEASE_THIS) {
      zend_get_gc_buffer_add_obj(buf, Z_OBJ(call->This));
    }
    if (ZEND_CALL_INFO(call) & ZEND_CALL_HAS_EXTRA_NAMED_PARAMS) {
      zval *val;
      ZEND_HASH_FOREACH_VAL(call->extra_named_params, val) {
        zend_get_gc_buffer_add_zval(buf, val);
      } ZEND_HASH_FOREACH_END();
    }
    if (call->func->common.fn_flags & ZEND_ACC_CLOSURE) {
      zend_get_gc_buffer_add_obj(buf, ZEND_CLOSURE_OBJECT(call->func));
    }

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

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_NS_FCALL_BY_NAME ||
      opline->opcode == ZEND_INIT_DYNAMIC_CALL ||
      opline->opcode == ZEND_INIT_USER_CALL ||
      opline->opcode == ZEND_INIT_METHOD_CALL ||
      opline->opcode == ZEND_INIT_STATIC_METHOD_CALL ||
      opline->opcode == ZEND_INIT_PARENT_PROPERTY_HOOK_CALL ||
      opline->opcode == ZEND_NEW)) {
      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:
          case ZEND_CALLABLE_CONVERT:
            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_INIT_PARENT_PROPERTY_HOOK_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_FUNC_ARG:
          case ZEND_SEND_REF:
          case ZEND_SEND_VAR_NO_REF:
          case ZEND_SEND_VAR_NO_REF_EX:
          case ZEND_SEND_USER:
            if (level == 0) {
              /* For named args, the number of arguments is up to date. */
              if (opline->op2_type != IS_CONST) {
                ZEND_CALL_NUM_ARGS(call) = opline->op2.num;
              }
              do_exit = 1;
            }
            break;
          case ZEND_SEND_ARRAY:
          case ZEND_SEND_UNPACK:
          case ZEND_CHECK_UNDEF_ARGS:
            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:
            case ZEND_CALLABLE_CONVERT:
              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_INIT_PARENT_PROPERTY_HOOK_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) {
        OBJ_RELEASE(Z_OBJ(call->This));
      }
      if (ZEND_CALL_INFO(call) & ZEND_CALL_HAS_EXTRA_NAMED_PARAMS) {
        zend_free_extra_named_params(call->extra_named_params);
      }
      if (call->func->common.fn_flags & ZEND_ACC_CLOSURE) {
        zend_object_release(ZEND_CLOSURE_OBJECT(call->func));
      } else if (call->func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) {
        zend_string_release_ex(call->func->common.function_name, 0);
        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);

        /* Handle the split range for loop vars */
        if (catch_op_num) {
          zend_op *final_op = EX(func)->op_array.opcodes + range->end;
          if (final_op->extended_value & ZEND_FREE_ON_RETURN && (final_op->opcode == ZEND_FE_FREE || final_op->opcode == ZEND_FREE)) {
            if (catch_op_num < range->end + final_op->op2.num) {
              continue;
            }
          }
        }

        if (kind == ZEND_LIVE_TMPVAR) {
          zval_ptr_dtor_nogc(var);
        } else if (kind == ZEND_LIVE_NEW) {
          zend_object *obj;
          ZEND_ASSERT(Z_TYPE_P(var) == IS_OBJECT);
          obj = Z_OBJ_P(var);
          zend_object_store_ctor_failed(obj);
          OBJ_RELEASE(obj);
        } 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;
          const 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_ex(*rope, 0);
          } else {
            uint32_t j = last->extended_value;
            do {
              zend_string_release_ex(rope[j], 0);
            } while (j--);
          }
        } else if (kind == ZEND_LIVE_SILENCE) {
          /* restore previous error_reporting value */
          if (E_HAS_ONLY_FATAL_ERRORS(EG(error_reporting))
              && !E_HAS_ONLY_FATAL_ERRORS(Z_LVAL_P(var))) {
            EG(error_reporting) = Z_LVAL_P(var);
          }
        }
      }
    }
  }
}
/* }}} */

ZEND_API 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);
}

ZEND_API ZEND_ATTRIBUTE_DEPRECATED HashTable *zend_unfinished_execution_gc(zend_execute_data *execute_data, zend_execute_data *call, zend_get_gc_buffer *gc_buffer)
{
  return zend_unfinished_execution_gc_ex(execute_data, call, gc_buffer, false);
}

ZEND_API HashTable *zend_unfinished_execution_gc_ex(zend_execute_data *execute_data, zend_execute_data *call, zend_get_gc_buffer *gc_buffer, bool suspended_by_yield)
{
  if (!EX(func)) {
    return NULL;
  }

  if (EX_CALL_INFO() & ZEND_CALL_RELEASE_THIS) {
    zend_get_gc_buffer_add_obj(gc_buffer, Z_OBJ(execute_data->This));
  }

  if (EX_CALL_INFO() & ZEND_CALL_CLOSURE) {
    zend_get_gc_buffer_add_obj(gc_buffer, ZEND_CLOSURE_OBJECT(EX(func)));
  }

  if (!ZEND_USER_CODE(EX(func)->common.type)) {
    ZEND_ASSERT(!(EX_CALL_INFO() & (ZEND_CALL_HAS_SYMBOL_TABLE|ZEND_CALL_FREE_EXTRA_ARGS|ZEND_CALL_HAS_EXTRA_NAMED_PARAMS)));
    return NULL;
  }

  const zend_op_array *op_array = &EX(func)->op_array;

  if (!(EX_CALL_INFO() & ZEND_CALL_HAS_SYMBOL_TABLE)) {
    uint32_t i, num_cvs = EX(func)->op_array.last_var;
    for (i = 0; i < num_cvs; i++) {
      zend_get_gc_buffer_add_zval(gc_buffer, EX_VAR_NUM(i));
    }
  }

  if (EX_CALL_INFO() & ZEND_CALL_FREE_EXTRA_ARGS) {
    zval *zv = EX_VAR_NUM(op_array->last_var + op_array->T);
    const zval *end = zv + (EX_NUM_ARGS() - op_array->num_args);
    while (zv != end) {
      zend_get_gc_buffer_add_zval(gc_buffer, zv++);
    }
  }

  if (EX_CALL_INFO() & ZEND_CALL_HAS_EXTRA_NAMED_PARAMS) {
    zval extra_named_params;
    ZVAL_ARR(&extra_named_params, EX(extra_named_params));
    zend_get_gc_buffer_add_zval(gc_buffer, &extra_named_params);
  }

  uint32_t op_num;
  if (UNEXPECTED(execute_data->opline->opcode == ZEND_HANDLE_EXCEPTION)) {
    op_num = EG(opline_before_exception) - op_array->opcodes;
  } else {
    op_num = execute_data->opline - op_array->opcodes;
  }
  ZEND_ASSERT(op_num < op_array->last);

  if (call) {
    zend_unfinished_calls_gc(execute_data, call, op_num, gc_buffer);
  }

  if (execute_data->opline != op_array->opcodes) {
    uint32_t i;
    for (i = 0; i < op_array->last_live_range; i++) {
      const zend_live_range *range = &op_array->live_range[i];
      if (range->start > op_num) {
        break;
      } else if (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 || kind == ZEND_LIVE_LOOP) {
          zend_get_gc_buffer_add_zval(gc_buffer, var);
        }
      }
    }
  }

  if (EX_CALL_INFO() & ZEND_CALL_HAS_SYMBOL_TABLE) {
    return execute_data->symbol_table;
  } else {
    return NULL;
  }
}

#if ZEND_VM_SPEC
static void zend_swap_operands(zend_op *op) /* {{{ */
{
  znode_op     tmp;
  uint8_t   tmp_type;

  tmp          = op->op1;
  tmp_type     = op->op1_type;
  op->op1      = op->op2;
  op->op1_type = op->op2_type;
  op->op2      = tmp;
  op->op2_type = tmp_type;

#ifdef ZEND_VERIFY_TYPE_INFERENCE
  uint32_t tmp_info;
  tmp_info = op->op1_use_type;
  op->op1_use_type = op->op2_use_type;
  op->op2_use_type = tmp_info;
  tmp_info = op->op1_def_type;
  op->op1_def_type = op->op2_def_type;
  op->op2_def_type = tmp_info;
#endif
}
/* }}} */
#endif

static zend_never_inline zend_execute_data *zend_init_dynamic_call_string(zend_string *function, uint32_t num_args) /* {{{ */
{
  zend_function *fbc;
  zval *func;
  zend_class_entry *called_scope;
  zend_string *lcname;
  const char *colon;

  if ((colon = zend_memrchr(ZSTR_VAL(function), ':', ZSTR_LEN(function))) != NULL &&
    colon > ZSTR_VAL(function) &&
    *(colon-1) == ':'
  ) {
    zend_string *mname;
    size_t cname_length = colon - ZSTR_VAL(function) - 1;
    size_t mname_length = ZSTR_LEN(function) - cname_length - (sizeof("::") - 1);

    lcname = zend_string_init(ZSTR_VAL(function), cname_length, 0);

    called_scope = zend_fetch_class_by_name(lcname, NULL, ZEND_FETCH_CLASS_DEFAULT | ZEND_FETCH_CLASS_EXCEPTION);
    if (UNEXPECTED(called_scope == NULL)) {
      zend_string_release_ex(lcname, 0);
      return NULL;
    }

    mname = zend_string_init(ZSTR_VAL(function) + (cname_length + sizeof("::") - 1), mname_length, 0);

    if (called_scope->get_static_method) {
      fbc = called_scope->get_static_method(called_scope, mname);
    } else {
      fbc = zend_std_get_static_method(called_scope, mname, NULL);
    }
    if (UNEXPECTED(fbc == NULL)) {
      if (EXPECTED(!EG(exception))) {
        zend_undefined_method(called_scope, mname);
      }
      zend_string_release_ex(lcname, 0);
      zend_string_release_ex(mname, 0);
      return NULL;
    }

    zend_string_release_ex(lcname, 0);
    zend_string_release_ex(mname, 0);

    if (UNEXPECTED(!(fbc->common.fn_flags & ZEND_ACC_STATIC))) {
      zend_non_static_method_call(fbc);
      if (fbc->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) {
        zend_string_release_ex(fbc->common.function_name, 0);
        zend_free_trampoline(fbc);
      }
      return NULL;
    }
    if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!RUN_TIME_CACHE(&fbc->op_array))) {
      init_func_run_time_cache(&fbc->op_array);
    }
  } else {
    if (ZSTR_VAL(function)[0] == '\\') {
      lcname = zend_string_alloc(ZSTR_LEN(function) - 1, 0);
      zend_str_tolower_copy(ZSTR_VAL(lcname), ZSTR_VAL(function) + 1, ZSTR_LEN(function) - 1);
    } else {
      lcname = zend_string_tolower(function);
    }
    if (UNEXPECTED((func = zend_hash_find(EG(function_table), lcname)) == NULL)) {
      zend_throw_error(NULL, "Call to undefined function %s()", ZSTR_VAL(function));
      zend_string_release_ex(lcname, 0);
      return NULL;
    }
    zend_string_release_ex(lcname, 0);

    fbc = Z_FUNC_P(func);
    if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!RUN_TIME_CACHE(&fbc->op_array))) {
      init_func_run_time_cache(&fbc->op_array);
    }
    called_scope = NULL;
  }

  return zend_vm_stack_push_call_frame(ZEND_CALL_NESTED_FUNCTION | ZEND_CALL_DYNAMIC,
    fbc, num_args, called_scope);
}
/* }}} */

static zend_never_inline zend_execute_data *zend_init_dynamic_call_object(zend_object *function, uint32_t num_args) /* {{{ */
{
  zend_function *fbc;
  void *object_or_called_scope;
  zend_class_entry *called_scope;
  zend_object *object;
  uint32_t call_info;

  if (EXPECTED(function->handlers->get_closure) &&
      EXPECTED(function->handlers->get_closure(function, &called_scope, &fbc, &object, 0) == SUCCESS)) {

    object_or_called_scope = called_scope;
    if (EXPECTED(fbc->common.fn_flags & ZEND_ACC_CLOSURE)) {
      /* Delay closure destruction until its invocation */
      GC_ADDREF(ZEND_CLOSURE_OBJECT(fbc));
      ZEND_ASSERT(ZEND_ACC_FAKE_CLOSURE == ZEND_CALL_FAKE_CLOSURE);
      call_info = ZEND_CALL_NESTED_FUNCTION | ZEND_CALL_DYNAMIC | ZEND_CALL_CLOSURE |
        (fbc->common.fn_flags & ZEND_ACC_FAKE_CLOSURE);
      if (object) {
        call_info |= ZEND_CALL_HAS_THIS;
        object_or_called_scope = object;
      }
    } else {
      call_info = ZEND_CALL_NESTED_FUNCTION | ZEND_CALL_DYNAMIC;
      if (object) {
        call_info |= ZEND_CALL_RELEASE_THIS | ZEND_CALL_HAS_THIS;
        GC_ADDREF(object); /* For $this pointer */
        object_or_called_scope = object;
      }
    }
  } else {
    zend_throw_error(NULL, "Object of type %s is not callable", ZSTR_VAL(function->ce->name));
    return NULL;
  }

  if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!RUN_TIME_CACHE(&fbc->op_array))) {
    init_func_run_time_cache(&fbc->op_array);
  }

  return zend_vm_stack_push_call_frame(call_info,
    fbc, num_args, object_or_called_scope);
}
/* }}} */

static zend_never_inline zend_execute_data *zend_init_dynamic_call_array(zend_array *function, uint32_t num_args) /* {{{ */
{
  zend_function *fbc;
  void *object_or_called_scope;
  uint32_t call_info = ZEND_CALL_NESTED_FUNCTION | ZEND_CALL_DYNAMIC;

  if (zend_hash_num_elements(function) == 2) {
    zval *obj;
    zval *method;
    obj = zend_hash_index_find(function, 0);
    method = zend_hash_index_find(function, 1);

    if (UNEXPECTED(!obj) || UNEXPECTED(!method)) {
      zend_throw_error(NULL, "Array callback has to contain indices 0 and 1");
      return NULL;
    }

    ZVAL_DEREF(obj);
    if (UNEXPECTED(Z_TYPE_P(obj) != IS_STRING) && UNEXPECTED(Z_TYPE_P(obj) != IS_OBJECT)) {
      zend_throw_error(NULL, "First array member is not a valid class name or object");
      return NULL;
    }

    ZVAL_DEREF(method);
    if (UNEXPECTED(Z_TYPE_P(method) != IS_STRING)) {
      zend_throw_error(NULL, "Second array member is not a valid method");
      return NULL;
    }

    if (Z_TYPE_P(obj) == IS_STRING) {
      zend_class_entry *called_scope = zend_fetch_class_by_name(Z_STR_P(obj), NULL, ZEND_FETCH_CLASS_DEFAULT | ZEND_FETCH_CLASS_EXCEPTION);

      if (UNEXPECTED(called_scope == NULL)) {
        return NULL;
      }

      if (called_scope->get_static_method) {
        fbc = called_scope->get_static_method(called_scope, Z_STR_P(method));
      } else {
        fbc = zend_std_get_static_method(called_scope, Z_STR_P(method), NULL);
      }
      if (UNEXPECTED(fbc == NULL)) {
        if (EXPECTED(!EG(exception))) {
          zend_undefined_method(called_scope, Z_STR_P(method));
        }
        return NULL;
      }
      if (!(fbc->common.fn_flags & ZEND_ACC_STATIC)) {
        zend_non_static_method_call(fbc);
        if (fbc->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) {
          zend_string_release_ex(fbc->common.function_name, 0);
          zend_free_trampoline(fbc);
        }
        return NULL;
      }
      object_or_called_scope = called_scope;
    } else {
      zend_object *object = Z_OBJ_P(obj);

      fbc = Z_OBJ_HT_P(obj)->get_method(&object, Z_STR_P(method), NULL);
      if (UNEXPECTED(fbc == NULL)) {
        if (EXPECTED(!EG(exception))) {
          zend_undefined_method(object->ce, Z_STR_P(method));
        }
        return NULL;
      }

      if ((fbc->common.fn_flags & ZEND_ACC_STATIC) != 0) {
        object_or_called_scope = object->ce;
      } else {
        call_info |= ZEND_CALL_RELEASE_THIS | ZEND_CALL_HAS_THIS;
        GC_ADDREF(object); /* For $this pointer */
        object_or_called_scope = object;
      }
    }
  } else {
    zend_throw_error(NULL, "Array callback must have exactly two elements");
    return NULL;
  }

  if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!RUN_TIME_CACHE(&fbc->op_array))) {
    init_func_run_time_cache(&fbc->op_array);
  }

  return zend_vm_stack_push_call_frame(call_info,
    fbc, num_args, object_or_called_scope);
}
/* }}} */

#define ZEND_FAKE_OP_ARRAY ((zend_op_array*)(intptr_t)-1)

static zend_never_inline zend_op_array* ZEND_FASTCALL zend_include_or_eval(zval *inc_filename_zv, int type) /* {{{ */
{
  zend_op_array *new_op_array = NULL;
  zend_string *tmp_inc_filename;
  zend_string *inc_filename = zval_try_get_tmp_string(inc_filename_zv, &tmp_inc_filename);
  if (UNEXPECTED(!inc_filename)) {
    return NULL;
  }

  switch (type) {
    case ZEND_INCLUDE_ONCE:
    case ZEND_REQUIRE_ONCE: {
        zend_file_handle file_handle;
        zend_string *resolved_path;

        resolved_path = zend_resolve_path(inc_filename);
        if (EXPECTED(resolved_path)) {
          if (zend_hash_exists(&EG(included_files), resolved_path)) {
            new_op_array = ZEND_FAKE_OP_ARRAY;
            zend_string_release_ex(resolved_path, 0);
            break;
          }
        } else if (UNEXPECTED(EG(exception))) {
          break;
        } else if (UNEXPECTED(zend_str_has_nul_byte(inc_filename))) {
          zend_message_dispatcher(
            (type == ZEND_INCLUDE_ONCE) ?
              ZMSG_FAILED_INCLUDE_FOPEN : ZMSG_FAILED_REQUIRE_FOPEN,
              ZSTR_VAL(inc_filename));
          break;
        } else {
          resolved_path = zend_string_copy(inc_filename);
        }

        zend_stream_init_filename_ex(&file_handle, resolved_path);
        if (SUCCESS == zend_stream_open(&file_handle)) {

          if (!file_handle.opened_path) {
            file_handle.opened_path = zend_string_copy(resolved_path);
          }

          if (zend_hash_add_empty_element(&EG(included_files), file_handle.opened_path)) {
            new_op_array = zend_compile_file(&file_handle, (type==ZEND_INCLUDE_ONCE?ZEND_INCLUDE:ZEND_REQUIRE));
          } else {
            new_op_array = ZEND_FAKE_OP_ARRAY;
          }
        } else if (!EG(exception)) {
          zend_message_dispatcher(
            (type == ZEND_INCLUDE_ONCE) ?
              ZMSG_FAILED_INCLUDE_FOPEN : ZMSG_FAILED_REQUIRE_FOPEN,
              ZSTR_VAL(inc_filename));
        }
        zend_destroy_file_handle(&file_handle);
        zend_string_release_ex(resolved_path, 0);
      }
      break;
    case ZEND_INCLUDE:
    case ZEND_REQUIRE:
      if (UNEXPECTED(zend_str_has_nul_byte(inc_filename))) {
        zend_message_dispatcher(
          (type == ZEND_INCLUDE) ?
            ZMSG_FAILED_INCLUDE_FOPEN : ZMSG_FAILED_REQUIRE_FOPEN,
            ZSTR_VAL(inc_filename));
        break;
      }
      new_op_array = compile_filename(type, inc_filename);
      break;
    case ZEND_EVAL: {
        char *eval_desc = zend_make_compiled_string_description("eval()'d code");
        new_op_array = zend_compile_string(inc_filename, eval_desc, ZEND_COMPILE_POSITION_AFTER_OPEN_TAG);
        efree(eval_desc);
      }
      break;
    EMPTY_SWITCH_DEFAULT_CASE()
  }

  zend_tmp_string_release(tmp_inc_filename);
  return new_op_array;
}
/* }}} */

static zend_never_inline bool ZEND_FASTCALL zend_fe_reset_iterator(zval *array_ptr, int by_ref OPLINE_DC EXECUTE_DATA_DC) /* {{{ */
{
  zend_class_entry *ce = Z_OBJCE_P(array_ptr);
  zend_object_iterator *iter = ce->get_iterator(ce, array_ptr, by_ref);
  bool is_empty;

  if (UNEXPECTED(!iter) || UNEXPECTED(EG(exception))) {
    if (iter) {
      OBJ_RELEASE(&iter->std);
    }
    if (!EG(exception)) {
      zend_throw_exception_ex(NULL, 0, "Object of type %s did not create an Iterator", ZSTR_VAL(ce->name));
    }
    ZVAL_UNDEF(EX_VAR(opline->result.var));
    return 1;
  }

  iter->index = 0;
  if (iter->funcs->rewind) {
    iter->funcs->rewind(iter);
    if (UNEXPECTED(EG(exception) != NULL)) {
      OBJ_RELEASE(&iter->std);
      ZVAL_UNDEF(EX_VAR(opline->result.var));
      return 1;
    }
  }

  is_empty = iter->funcs->valid(iter) != SUCCESS;

  if (UNEXPECTED(EG(exception) != NULL)) {
    OBJ_RELEASE(&iter->std);
    ZVAL_UNDEF(EX_VAR(opline->result.var));
    return 1;
  }
  iter->index = -1; /* will be set to 0 before using next handler */

  ZVAL_OBJ(EX_VAR(opline->result.var), &iter->std);
  Z_FE_ITER_P(EX_VAR(opline->result.var)) = (uint32_t)-1;

  return is_empty;
}
/* }}} */

static zend_always_inline zend_result _zend_quick_get_constant(
    const zval *key, uint32_t flags, bool check_defined_only OPLINE_DC EXECUTE_DATA_DC) /* {{{ */
{
  zval *zv;
  zend_constant *c = NULL;

  /* null/true/false are resolved during compilation, so don't check for them here. */
  zv = zend_hash_find_known_hash(EG(zend_constants), Z_STR_P(key));
  if (zv) {
    c = (zend_constant*)Z_PTR_P(zv);
  } else if (flags & IS_CONSTANT_UNQUALIFIED_IN_NAMESPACE) {
    key++;
    zv = zend_hash_find_known_hash(EG(zend_constants), Z_STR_P(key));
    if (zv) {
      c = (zend_constant*)Z_PTR_P(zv);
    }
  }

  if (!c) {
    if (!check_defined_only) {
      zend_throw_error(NULL, "Undefined constant \"%s\"", Z_STRVAL_P(RT_CONSTANT(opline, opline->op2)));
      ZVAL_UNDEF(EX_VAR(opline->result.var));
    }
    return FAILURE;
  }

  if (!check_defined_only) {
    ZVAL_COPY_OR_DUP(EX_VAR(opline->result.var), &c->value);
    if (ZEND_CONSTANT_FLAGS(c) & CONST_DEPRECATED) {
      if (!CONST_IS_RECURSIVE(c)) {
        CONST_PROTECT_RECURSION(c);
        zend_deprecated_constant(c, c->name);
        CONST_UNPROTECT_RECURSION(c);
      }
      return SUCCESS;
    }
  }

  CACHE_PTR(opline->extended_value, c);
  return SUCCESS;
}
/* }}} */

static zend_never_inline void ZEND_FASTCALL zend_quick_get_constant(
    const zval *key, uint32_t flags OPLINE_DC EXECUTE_DATA_DC) /* {{{ */
{
  _zend_quick_get_constant(key, flags, 0 OPLINE_CC EXECUTE_DATA_CC);
} /* }}} */

static zend_never_inline zend_result ZEND_FASTCALL zend_quick_check_constant(
    const zval *key OPLINE_DC EXECUTE_DATA_DC) /* {{{ */
{
  return _zend_quick_get_constant(key, 0, 1 OPLINE_CC EXECUTE_DATA_CC);
} /* }}} */

static zend_always_inline uint32_t zend_get_arg_offset_by_name(
    const zend_function *fbc, const zend_string *arg_name, void **cache_slot) {
  /* Due to closures, the `fbc` address isn't unique if the memory address is reused.
   * The argument info will be however and uniquely positions the arguments.
   * We do support NULL arg_info, so we have to distinguish that from an uninitialized cache slot. */
  void *unique_id = (void *) ((uintptr_t) fbc->common.arg_info | 1);

  if (EXPECTED(*cache_slot == unique_id)) {
    return *(uintptr_t *)(cache_slot + 1);
  }

  // TODO: Use a hash table?
  uint32_t num_args = fbc->common.num_args;
  for (uint32_t i = 0; i < num_args; i++) {
    const zend_arg_info *arg_info = &fbc->common.arg_info[i];
    if (zend_string_equals(arg_name, arg_info->name)) {
      if ((fbc->type == ZEND_USER_FUNCTION
        && (!fbc->op_array.refcount || !(fbc->op_array.fn_flags & ZEND_ACC_CLOSURE)))
       || (fbc->type == ZEND_INTERNAL_FUNCTION
        && !(fbc->common.fn_flags & ZEND_ACC_NEVER_CACHE))) {
        *cache_slot = unique_id;
        *(uintptr_t *)(cache_slot + 1) = i;
      }
      return i;
    }
  }

  if (fbc->common.fn_flags & ZEND_ACC_VARIADIC) {
    if ((fbc->type == ZEND_USER_FUNCTION
      && (!fbc->op_array.refcount || !(fbc->op_array.fn_flags & ZEND_ACC_CLOSURE)))
     || (fbc->type == ZEND_INTERNAL_FUNCTION
      && !(fbc->common.fn_flags & ZEND_ACC_NEVER_CACHE))) {
      *cache_slot = unique_id;
      *(uintptr_t *)(cache_slot + 1) = fbc->common.num_args;
    }
    return fbc->common.num_args;
  }

  return (uint32_t) -1;
}

zval * ZEND_FASTCALL zend_handle_named_arg(
    zend_execute_data **call_ptr, zend_string *arg_name,
    uint32_t *arg_num_ptr, void **cache_slot) {
  zend_execute_data *call = *call_ptr;
  const zend_function *fbc = call->func;
  uint32_t arg_offset = zend_get_arg_offset_by_name(fbc, arg_name, cache_slot);
  if (UNEXPECTED(arg_offset == (uint32_t) -1)) {
    zend_throw_error(NULL, "Unknown named parameter $%s", ZSTR_VAL(arg_name));
    return NULL;
  }

  zval *arg;
  if (UNEXPECTED(arg_offset == fbc->common.num_args)) {
    /* Unknown named parameter that will be collected into a variadic. */
    if (!(ZEND_CALL_INFO(call) & ZEND_CALL_HAS_EXTRA_NAMED_PARAMS)) {
      ZEND_ADD_CALL_FLAG(call, ZEND_CALL_HAS_EXTRA_NAMED_PARAMS);
      call->extra_named_params = zend_new_array(0);
    }

    arg = zend_hash_add_empty_element(call->extra_named_params, arg_name);
    if (!arg) {
      zend_throw_error(NULL, "Named parameter $%s overwrites previous argument",
        ZSTR_VAL(arg_name));
      return NULL;
    }
    *arg_num_ptr = arg_offset + 1;
    return arg;
  }

  uint32_t current_num_args = ZEND_CALL_NUM_ARGS(call);
  // TODO: We may wish to optimize the arg_offset == current_num_args case,
  // which is probably common (if the named parameters are in order of declaration).
  if (arg_offset >= current_num_args) {
    uint32_t new_num_args = arg_offset + 1;
    ZEND_CALL_NUM_ARGS(call) = new_num_args;

    uint32_t num_extra_args = new_num_args - current_num_args;
    zend_vm_stack_extend_call_frame(call_ptr, current_num_args, num_extra_args);
    call = *call_ptr;

    arg = ZEND_CALL_VAR_NUM(call, arg_offset);
    if (num_extra_args > 1) {
      zval *zv = ZEND_CALL_VAR_NUM(call, current_num_args);
      do {
        ZVAL_UNDEF(zv);
        zv++;
      } while (zv != arg);
      ZEND_ADD_CALL_FLAG(call, ZEND_CALL_MAY_HAVE_UNDEF);
    }
  } else {
    arg = ZEND_CALL_VAR_NUM(call, arg_offset);
    if (UNEXPECTED(!Z_ISUNDEF_P(arg))) {
      zend_throw_error(NULL, "Named parameter $%s overwrites previous argument",
        ZSTR_VAL(arg_name));
      return NULL;
    }
  }

  *arg_num_ptr = arg_offset + 1;
  return arg;
}

static zend_execute_data *start_fake_frame(zend_execute_data *call, const zend_op *opline) {
  zend_execute_data *old_prev_execute_data = call->prev_execute_data;
  call->prev_execute_data = EG(current_execute_data);
  call->opline = opline;
  EG(current_execute_data) = call;
  return old_prev_execute_data;
}

static void end_fake_frame(zend_execute_data *call, zend_execute_data *old_prev_execute_data) {
  zend_execute_data *prev_execute_data = call->prev_execute_data;
  EG(current_execute_data) = prev_execute_data;
  call->prev_execute_data = old_prev_execute_data;
  if (UNEXPECTED(EG(exception)) && ZEND_USER_CODE(prev_execute_data->func->common.type)) {
    zend_rethrow_exception(prev_execute_data);
  }
}

ZEND_API zend_result ZEND_FASTCALL zend_handle_undef_args(zend_execute_data *call) {
  zend_function *fbc = call->func;
  if (fbc->type == ZEND_USER_FUNCTION) {
    zend_op_array *op_array = &fbc->op_array;
    uint32_t num_args = ZEND_CALL_NUM_ARGS(call);
    for (uint32_t i = 0; i < num_args; i++) {
      zval *arg = ZEND_CALL_VAR_NUM(call, i);
      if (!Z_ISUNDEF_P(arg)) {
        continue;
      }

      const zend_op *opline = &op_array->opcodes[i];
      if (EXPECTED(opline->opcode == ZEND_RECV_INIT)) {
        zval *default_value = RT_CONSTANT(opline, opline->op2);
        if (Z_OPT_TYPE_P(default_value) == IS_CONSTANT_AST) {
          if (UNEXPECTED(!RUN_TIME_CACHE(op_array))) {
            init_func_run_time_cache(op_array);
          }

          void *run_time_cache = RUN_TIME_CACHE(op_array);
          zval *cache_val =
            (zval *) ((char *) run_time_cache + Z_CACHE_SLOT_P(default_value));

          if (Z_TYPE_P(cache_val) != IS_UNDEF) {
            /* We keep in cache only not refcounted values */
            ZVAL_COPY_VALUE(arg, cache_val);
          } else {
            /* Update constant inside a temporary zval, to make sure the CONSTANT_AST
             * value is not accessible through back traces. */
            zval tmp;
            ZVAL_COPY(&tmp, default_value);
            zend_execute_data *old = start_fake_frame(call, opline);
            zend_result ret = zval_update_constant_ex(&tmp, fbc->op_array.scope);
            end_fake_frame(call, old);
            if (UNEXPECTED(ret == FAILURE)) {
              zval_ptr_dtor_nogc(&tmp);
              return FAILURE;
            }
            ZVAL_COPY_VALUE(arg, &tmp);
            if (!Z_REFCOUNTED(tmp)) {
              ZVAL_COPY_VALUE(cache_val, &tmp);
            }
          }
        } else {
          ZVAL_COPY(arg, default_value);
        }
      } else {
        ZEND_ASSERT(opline->opcode == ZEND_RECV);
        zend_execute_data *old = start_fake_frame(call, opline);
        zend_argument_error(zend_ce_argument_count_error, i + 1, "not passed");
        end_fake_frame(call, old);
        return FAILURE;
      }
    }

    return SUCCESS;
  } else {
    if (fbc->common.fn_flags & ZEND_ACC_USER_ARG_INFO) {
      /* Magic function, let it deal with it. */
      return SUCCESS;
    }

    uint32_t num_args = ZEND_CALL_NUM_ARGS(call);
    for (uint32_t i = 0; i < num_args; i++) {
      zval *arg = ZEND_CALL_VAR_NUM(call, i);
      if (!Z_ISUNDEF_P(arg)) {
        continue;
      }

      zend_arg_info *arg_info = &fbc->internal_function.arg_info[i];
      if (i < fbc->common.required_num_args) {
        zend_execute_data *old = start_fake_frame(call, NULL);
        zend_argument_error(zend_ce_argument_count_error, i + 1, "not passed");
        end_fake_frame(call, old);
        return FAILURE;
      }

      zval default_value;
      if (zend_get_default_from_internal_arg_info(&default_value, arg_info) == FAILURE) {
        zend_execute_data *old = start_fake_frame(call, NULL);
        zend_argument_error(zend_ce_argument_count_error, i + 1,
          "must be passed explicitly, because the default value is not known");
        end_fake_frame(call, old);
        return FAILURE;
      }

      if (Z_TYPE(default_value) == IS_CONSTANT_AST) {
        zend_execute_data *old = start_fake_frame(call, NULL);
        zend_result ret = zval_update_constant_ex(&default_value, fbc->common.scope);
        end_fake_frame(call, old);
        if (ret == FAILURE) {
          return FAILURE;
        }
      }

      ZVAL_COPY_VALUE(arg, &default_value);
      if (ZEND_ARG_SEND_MODE(arg_info) & ZEND_SEND_BY_REF) {
        ZVAL_NEW_REF(arg, arg);
      }
    }
  }

  return SUCCESS;
}

ZEND_API void ZEND_FASTCALL zend_free_extra_named_params(zend_array *extra_named_params)
{
  /* Extra named params may be shared. */
  zend_array_release(extra_named_params);
}

#if defined(ZEND_VM_IP_GLOBAL_REG) && ((ZEND_VM_KIND == ZEND_VM_KIND_CALL) || (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID))
/* Special versions of functions that sets EX(opline) before calling zend_vm_stack_extend() */
static zend_always_inline zend_execute_data *_zend_vm_stack_push_call_frame_ex(uint32_t used_stack, uint32_t call_info, zend_function *func, uint32_t num_args, void *object_or_called_scope) /* {{{ */
{
  zend_execute_data *call = (zend_execute_data*)EG(vm_stack_top);

  ZEND_ASSERT_VM_STACK_GLOBAL;

  if (UNEXPECTED(used_stack > (size_t)(((char*)EG(vm_stack_end)) - (char*)call))) {
    EX(opline) = opline; /* this is the only difference */
    call = (zend_execute_data*)zend_vm_stack_extend(used_stack);
    ZEND_ASSERT_VM_STACK_GLOBAL;
    zend_vm_init_call_frame(call, call_info | ZEND_CALL_ALLOCATED, func, num_args, object_or_called_scope);
    return call;
  } else {
    EG(vm_stack_top) = (zval*)((char*)call + used_stack);
    zend_vm_init_call_frame(call, call_info, func, num_args, object_or_called_scope);
    return call;
  }
} /* }}} */

static zend_always_inline zend_execute_data *_zend_vm_stack_push_call_frame(uint32_t call_info, zend_function *func, uint32_t num_args, void *object_or_called_scope) /* {{{ */
{
  uint32_t used_stack = zend_vm_calc_used_stack(num_args, func);

  return _zend_vm_stack_push_call_frame_ex(used_stack, call_info,
    func, num_args, object_or_called_scope);
} /* }}} */
#else
# define _zend_vm_stack_push_call_frame_ex zend_vm_stack_push_call_frame_ex
# define _zend_vm_stack_push_call_frame    zend_vm_stack_push_call_frame
#endif

#ifdef ZEND_VM_TRACE_HANDLERS
# include "zend_vm_trace_handlers.h"
#elif defined(ZEND_VM_TRACE_LINES)
# include "zend_vm_trace_lines.h"
#elif defined(ZEND_VM_TRACE_MAP)
# include "zend_vm_trace_map.h"
#elif defined(ZEND_VERIFY_TYPE_INFERENCE)
# include "zend_verify_type_inference.h"
#endif

#define ZEND_VM_NEXT_OPCODE_EX(check_exception, skip) \
  CHECK_SYMBOL_TABLES() \
  if (check_exception) { \
    OPLINE = EX(opline) + (skip); \
  } else { \
    ZEND_ASSERT(!EG(exception)); \
    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_NO_INTERRUPT(new_op) \
  CHECK_SYMBOL_TABLES() \
  OPLINE = new_op

#define ZEND_VM_SET_OPCODE(new_op) \
  ZEND_VM_SET_OPCODE_NO_INTERRUPT(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_EX(new_op, check_exception) do { \
    if (check_exception && UNEXPECTED(EG(exception))) { \
      HANDLE_EXCEPTION(); \
    } \
    ZEND_VM_SET_OPCODE(new_op); \
    ZEND_VM_CONTINUE(); \
  } while (0)

#define ZEND_VM_JMP(new_op) \
  ZEND_VM_JMP_EX(new_op, 1)

#define ZEND_VM_INC_OPCODE() \
  OPLINE++


#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 { \
    if ((_check) && UNEXPECTED(EG(exception))) { \
      OPLINE = EX(opline); \
    } else if (EXPECTED(opline->result_type == (IS_SMART_BRANCH_JMPZ|IS_TMP_VAR))) { \
      if (_result) { \
        ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
      } else { \
        ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
      } \
    } else if (EXPECTED(opline->result_type == (IS_SMART_BRANCH_JMPNZ|IS_TMP_VAR))) { \
      if (!(_result)) { \
        ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
      } else { \
        ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
      } \
    } else { \
      ZVAL_BOOL(EX_VAR(opline->result.var), _result); \
      ZEND_VM_SET_NEXT_OPCODE(opline + 1); \
    } \
    ZEND_VM_CONTINUE(); \
  } while (0)
#define ZEND_VM_SMART_BRANCH_JMPZ(_result, _check) do { \
    if ((_check) && UNEXPECTED(EG(exception))) { \
      OPLINE = EX(opline); \
    } else 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))) { \
      OPLINE = EX(opline); \
    } else 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_NONE(_result, _check) do { \
    ZVAL_BOOL(EX_VAR(opline->result.var), _result); \
    ZEND_VM_NEXT_OPCODE_EX(_check, 1); \
    ZEND_VM_CONTINUE(); \
  } while (0)
#define ZEND_VM_SMART_BRANCH_TRUE() do { \
    if (EXPECTED(opline->result_type == (IS_SMART_BRANCH_JMPNZ|IS_TMP_VAR))) { \
      ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
    } else if (EXPECTED(opline->result_type == (IS_SMART_BRANCH_JMPZ|IS_TMP_VAR))) { \
      ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
    } else { \
      ZVAL_TRUE(EX_VAR(opline->result.var)); \
      ZEND_VM_SET_NEXT_OPCODE(opline + 1); \
    } \
    ZEND_VM_CONTINUE(); \
  } while (0)
#define ZEND_VM_SMART_BRANCH_TRUE_JMPZ() do { \
    ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
    ZEND_VM_CONTINUE(); \
  } while (0)
#define ZEND_VM_SMART_BRANCH_TRUE_JMPNZ() do { \
    ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
    ZEND_VM_CONTINUE(); \
  } while (0)
#define ZEND_VM_SMART_BRANCH_TRUE_NONE() do { \
    ZVAL_TRUE(EX_VAR(opline->result.var)); \
    ZEND_VM_NEXT_OPCODE(); \
  } while (0)
#define ZEND_VM_SMART_BRANCH_FALSE() do { \
    if (EXPECTED(opline->result_type == (IS_SMART_BRANCH_JMPNZ|IS_TMP_VAR))) { \
      ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
    } else if (EXPECTED(opline->result_type == (IS_SMART_BRANCH_JMPZ|IS_TMP_VAR))) { \
      ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
    } else { \
      ZVAL_FALSE(EX_VAR(opline->result.var)); \
      ZEND_VM_SET_NEXT_OPCODE(opline + 1); \
    } \
    ZEND_VM_CONTINUE(); \
  } while (0)
#define ZEND_VM_SMART_BRANCH_FALSE_JMPZ() do { \
    ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
    ZEND_VM_CONTINUE(); \
  } while (0)
#define ZEND_VM_SMART_BRANCH_FALSE_JMPNZ() do { \
    ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
    ZEND_VM_CONTINUE(); \
  } while (0)
#define ZEND_VM_SMART_BRANCH_FALSE_NONE() do { \
    ZVAL_FALSE(EX_VAR(opline->result.var)); \
    ZEND_VM_NEXT_OPCODE(); \
  } while (0)

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

#define UNDEF_RESULT() do { \
    if (opline->result_type & (IS_VAR | IS_TMP_VAR)) { \
      ZVAL_UNDEF(EX_VAR(opline->result.var)); \
    } \
  } while (0)

/* This callback disables optimization of "vm_stack_data" variable in VM */
ZEND_API void (ZEND_FASTCALL *zend_touch_vm_stack_data)(void *vm_stack_data) = NULL;

#include "zend_vm_execute.h"

ZEND_API zend_result 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(const zend_op *opline, int op_type, const znode_op *node, const zend_execute_data *execute_data)
{
  zval *ret;

  switch (op_type) {
    case IS_CONST:
      ret = RT_CONSTANT(opline, *node);
      break;
    case IS_TMP_VAR:
    case IS_VAR:
    case IS_CV:
      ret = EX_VAR(node->var);
      break;
    default:
      ret = NULL;
      break;
  }
  return ret;
}

Coverage Report

Created: 2026-01-18 06:47