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zend_object_handlers.c
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@php.net> |
| Zeev Suraski <zeev@php.net> |
| Dmitry Stogov <dmitry@php.net> |
+----------------------------------------------------------------------+
*/
#include "zend.h"
#include "zend_globals.h"
#include "zend_variables.h"
#include "zend_API.h"
#include "zend_objects.h"
#include "zend_objects_API.h"
#include "zend_object_handlers.h"
#include "zend_interfaces.h"
#include "zend_exceptions.h"
#include "zend_closures.h"
#include "zend_compile.h"
#include "zend_hash.h"
#define DEBUG_OBJECT_HANDLERS 0
#define ZEND_WRONG_PROPERTY_OFFSET 0
/* guard flags */
#define IN_GET (1<<0)
#define IN_SET (1<<1)
#define IN_UNSET (1<<2)
#define IN_ISSET (1<<3)
/*
__X accessors explanation:
if we have __get and property that is not part of the properties array is
requested, we call __get handler. If it fails, we return uninitialized.
if we have __set and property that is not part of the properties array is
set, we call __set handler. If it fails, we do not change the array.
for both handlers above, when we are inside __get/__set, no further calls for
__get/__set for this property of this object will be made, to prevent endless
recursion and enable accessors to change properties array.
if we have __call and method which is not part of the class function table is
called, we cal __call handler.
*/
ZEND_API void rebuild_object_properties(zend_object *zobj) /* {{{ */
{
if (!zobj->properties) {
zend_property_info *prop_info;
zend_class_entry *ce = zobj->ce;
int i;
zobj->properties = zend_new_array(ce->default_properties_count);
if (ce->default_properties_count) {
zend_hash_real_init_mixed(zobj->properties);
for (i = 0; i < ce->default_properties_count; i++) {
prop_info = ce->properties_info_table[i];
if (!prop_info) {
continue;
}
if (UNEXPECTED(Z_TYPE_P(OBJ_PROP(zobj, prop_info->offset)) == IS_UNDEF)) {
HT_FLAGS(zobj->properties) |= HASH_FLAG_HAS_EMPTY_IND;
}
_zend_hash_append_ind(zobj->properties, prop_info->name,
OBJ_PROP(zobj, prop_info->offset));
}
}
}
}
/* }}} */
ZEND_API HashTable *zend_std_build_object_properties_array(zend_object *zobj) /* {{{ */
{
zend_property_info *prop_info;
zend_class_entry *ce = zobj->ce;
HashTable *ht;
zval* prop;
int i;
ZEND_ASSERT(!zobj->properties);
ht = zend_new_array(ce->default_properties_count);
if (ce->default_properties_count) {
zend_hash_real_init_mixed(ht);
for (i = 0; i < ce->default_properties_count; i++) {
prop_info = ce->properties_info_table[i];
if (!prop_info) {
continue;
}
prop = OBJ_PROP(zobj, prop_info->offset);
if (UNEXPECTED(Z_TYPE_P(prop) == IS_UNDEF)) {
continue;
}
if (Z_ISREF_P(prop) && Z_REFCOUNT_P(prop) == 1) {
prop = Z_REFVAL_P(prop);
}
Z_TRY_ADDREF_P(prop);
_zend_hash_append(ht, prop_info->name, prop);
}
}
return ht;
}
/* }}} */
ZEND_API HashTable *zend_std_get_properties(zend_object *zobj) /* {{{ */
{
if (!zobj->properties) {
rebuild_object_properties(zobj);
}
return zobj->properties;
}
/* }}} */
ZEND_API HashTable *zend_std_get_gc(zend_object *zobj, zval **table, int *n) /* {{{ */
{
if (zobj->handlers->get_properties != zend_std_get_properties) {
*table = NULL;
*n = 0;
return zobj->handlers->get_properties(zobj);
} else {
if (zobj->properties) {
*table = NULL;
*n = 0;
return zobj->properties;
} else {
*table = zobj->properties_table;
*n = zobj->ce->default_properties_count;
return NULL;
}
}
}
/* }}} */
ZEND_API HashTable *zend_std_get_debug_info(zend_object *object, int *is_temp) /* {{{ */
{
zend_class_entry *ce = object->ce;
zval retval;
HashTable *ht;
if (!ce->__debugInfo) {
*is_temp = 0;
return object->handlers->get_properties(object);
}
zend_call_known_instance_method_with_0_params(ce->__debugInfo, object, &retval);
if (Z_TYPE(retval) == IS_ARRAY) {
if (!Z_REFCOUNTED(retval)) {
*is_temp = 1;
return zend_array_dup(Z_ARRVAL(retval));
} else if (Z_REFCOUNT(retval) <= 1) {
*is_temp = 1;
ht = Z_ARR(retval);
return ht;
} else {
*is_temp = 0;
zval_ptr_dtor(&retval);
return Z_ARRVAL(retval);
}
} else if (Z_TYPE(retval) == IS_NULL) {
*is_temp = 1;
ht = zend_new_array(0);
return ht;
}
zend_error_noreturn(E_ERROR, ZEND_DEBUGINFO_FUNC_NAME "() must return an array");
return NULL; /* Compilers are dumb and don't understand that noreturn means that the function does NOT need a return value... */
}
/* }}} */
static void zend_std_call_getter(zend_object *zobj, zend_string *prop_name, zval *retval) /* {{{ */
{
zval member;
ZVAL_STR(&member, prop_name);
zend_call_known_instance_method_with_1_params(zobj->ce->__get, zobj, retval, &member);
}
/* }}} */
static void zend_std_call_setter(zend_object *zobj, zend_string *prop_name, zval *value) /* {{{ */
{
zval args[2];
ZVAL_STR(&args[0], prop_name);
ZVAL_COPY_VALUE(&args[1], value);
zend_call_known_instance_method(zobj->ce->__set, zobj, NULL, 2, args);
}
/* }}} */
static void zend_std_call_unsetter(zend_object *zobj, zend_string *prop_name) /* {{{ */
{
zval member;
ZVAL_STR(&member, prop_name);
zend_call_known_instance_method_with_1_params(zobj->ce->__unset, zobj, NULL, &member);
}
/* }}} */
static void zend_std_call_issetter(zend_object *zobj, zend_string *prop_name, zval *retval) /* {{{ */
{
zval member;
ZVAL_STR(&member, prop_name);
zend_call_known_instance_method_with_1_params(zobj->ce->__isset, zobj, retval, &member);
}
/* }}} */
static zend_always_inline bool is_derived_class(zend_class_entry *child_class, zend_class_entry *parent_class) /* {{{ */
{
child_class = child_class->parent;
while (child_class) {
if (child_class == parent_class) {
return 1;
}
child_class = child_class->parent;
}
return 0;
}
/* }}} */
static zend_never_inline int is_protected_compatible_scope(zend_class_entry *ce, zend_class_entry *scope) /* {{{ */
{
return scope &&
(is_derived_class(ce, scope) || is_derived_class(scope, ce));
}
/* }}} */
static zend_never_inline zend_property_info *zend_get_parent_private_property(zend_class_entry *scope, zend_class_entry *ce, zend_string *member) /* {{{ */
{
zval *zv;
zend_property_info *prop_info;
if (scope != ce && scope && is_derived_class(ce, scope)) {
zv = zend_hash_find(&scope->properties_info, member);
if (zv != NULL) {
prop_info = (zend_property_info*)Z_PTR_P(zv);
if ((prop_info->flags & ZEND_ACC_PRIVATE)
&& prop_info->ce == scope) {
return prop_info;
}
}
}
return NULL;
}
/* }}} */
static ZEND_COLD zend_never_inline void zend_bad_property_access(zend_property_info *property_info, zend_class_entry *ce, zend_string *member) /* {{{ */
{
zend_throw_error(NULL, "Cannot access %s property %s::$%s", zend_visibility_string(property_info->flags), ZSTR_VAL(ce->name), ZSTR_VAL(member));
}
/* }}} */
static ZEND_COLD zend_never_inline void zend_bad_property_name(void) /* {{{ */
{
zend_throw_error(NULL, "Cannot access property starting with \"\\0\"");
}
/* }}} */
static ZEND_COLD zend_never_inline void zend_forbidden_dynamic_property(
zend_class_entry *ce, zend_string *member) {
zend_throw_error(NULL, "Cannot create dynamic property %s::$%s",
ZSTR_VAL(ce->name), ZSTR_VAL(member));
}
static ZEND_COLD zend_never_inline void zend_readonly_property_modification_scope_error(
zend_class_entry *ce, zend_string *member, zend_class_entry *scope, const char *operation) {
zend_throw_error(NULL, "Cannot %s readonly property %s::$%s from %s%s",
operation, ZSTR_VAL(ce->name), ZSTR_VAL(member),
scope ? "scope " : "global scope", scope ? ZSTR_VAL(scope->name) : "");
}
static ZEND_COLD zend_never_inline void zend_readonly_property_unset_error(
zend_class_entry *ce, zend_string *member) {
zend_throw_error(NULL, "Cannot unset readonly property %s::$%s",
ZSTR_VAL(ce->name), ZSTR_VAL(member));
}
static zend_always_inline uintptr_t zend_get_property_offset(zend_class_entry *ce, zend_string *member, int silent, void **cache_slot, zend_property_info **info_ptr) /* {{{ */
{
zval *zv;
zend_property_info *property_info;
uint32_t flags;
zend_class_entry *scope;
uintptr_t offset;
if (cache_slot && EXPECTED(ce == CACHED_PTR_EX(cache_slot))) {
*info_ptr = CACHED_PTR_EX(cache_slot + 2);
return (uintptr_t)CACHED_PTR_EX(cache_slot + 1);
}
if (UNEXPECTED(zend_hash_num_elements(&ce->properties_info) == 0)
|| UNEXPECTED((zv = zend_hash_find(&ce->properties_info, member)) == NULL)) {
if (UNEXPECTED(ZSTR_VAL(member)[0] == '\0') && ZSTR_LEN(member) != 0) {
if (!silent) {
zend_bad_property_name();
}
return ZEND_WRONG_PROPERTY_OFFSET;
}
dynamic:
if (cache_slot) {
CACHE_POLYMORPHIC_PTR_EX(cache_slot, ce, (void*)ZEND_DYNAMIC_PROPERTY_OFFSET);
CACHE_PTR_EX(cache_slot + 2, NULL);
}
return ZEND_DYNAMIC_PROPERTY_OFFSET;
}
property_info = (zend_property_info*)Z_PTR_P(zv);
flags = property_info->flags;
if (flags & (ZEND_ACC_CHANGED|ZEND_ACC_PRIVATE|ZEND_ACC_PROTECTED)) {
if (UNEXPECTED(EG(fake_scope))) {
scope = EG(fake_scope);
} else {
scope = zend_get_executed_scope();
}
if (property_info->ce != scope) {
if (flags & ZEND_ACC_CHANGED) {
zend_property_info *p = zend_get_parent_private_property(scope, ce, member);
/* If there is a public/protected instance property on ce, don't try to use a
* private static property on scope. If both are static, prefer the static
* property on scope. This will throw a static property notice, rather than
* a visibility error. */
if (p && (!(p->flags & ZEND_ACC_STATIC) || (flags & ZEND_ACC_STATIC))) {
property_info = p;
flags = property_info->flags;
goto found;
} else if (flags & ZEND_ACC_PUBLIC) {
goto found;
}
}
if (flags & ZEND_ACC_PRIVATE) {
if (property_info->ce != ce) {
goto dynamic;
} else {
wrong:
/* Information was available, but we were denied access. Error out. */
if (!silent) {
zend_bad_property_access(property_info, ce, member);
}
return ZEND_WRONG_PROPERTY_OFFSET;
}
} else {
ZEND_ASSERT(flags & ZEND_ACC_PROTECTED);
if (UNEXPECTED(!is_protected_compatible_scope(property_info->ce, scope))) {
goto wrong;
}
}
}
}
found:
if (UNEXPECTED(flags & ZEND_ACC_STATIC)) {
if (!silent) {
zend_error(E_NOTICE, "Accessing static property %s::$%s as non static", ZSTR_VAL(ce->name), ZSTR_VAL(member));
}
return ZEND_DYNAMIC_PROPERTY_OFFSET;
}
offset = property_info->offset;
if (EXPECTED(!ZEND_TYPE_IS_SET(property_info->type))) {
property_info = NULL;
} else {
*info_ptr = property_info;
}
if (cache_slot) {
CACHE_POLYMORPHIC_PTR_EX(cache_slot, ce, (void*)(uintptr_t)offset);
CACHE_PTR_EX(cache_slot + 2, property_info);
}
return offset;
}
/* }}} */
static ZEND_COLD void zend_wrong_offset(zend_class_entry *ce, zend_string *member) /* {{{ */
{
zend_property_info *dummy;
/* Trigger the correct error */
zend_get_property_offset(ce, member, 0, NULL, &dummy);
}
/* }}} */
ZEND_API zend_property_info *zend_get_property_info(zend_class_entry *ce, zend_string *member, int silent) /* {{{ */
{
zval *zv;
zend_property_info *property_info;
uint32_t flags;
zend_class_entry *scope;
if (UNEXPECTED(zend_hash_num_elements(&ce->properties_info) == 0)
|| EXPECTED((zv = zend_hash_find(&ce->properties_info, member)) == NULL)) {
if (UNEXPECTED(ZSTR_VAL(member)[0] == '\0') && ZSTR_LEN(member) != 0) {
if (!silent) {
zend_bad_property_name();
}
return ZEND_WRONG_PROPERTY_INFO;
}
dynamic:
return NULL;
}
property_info = (zend_property_info*)Z_PTR_P(zv);
flags = property_info->flags;
if (flags & (ZEND_ACC_CHANGED|ZEND_ACC_PRIVATE|ZEND_ACC_PROTECTED)) {
if (UNEXPECTED(EG(fake_scope))) {
scope = EG(fake_scope);
} else {
scope = zend_get_executed_scope();
}
if (property_info->ce != scope) {
if (flags & ZEND_ACC_CHANGED) {
zend_property_info *p = zend_get_parent_private_property(scope, ce, member);
if (p) {
property_info = p;
flags = property_info->flags;
goto found;
} else if (flags & ZEND_ACC_PUBLIC) {
goto found;
}
}
if (flags & ZEND_ACC_PRIVATE) {
if (property_info->ce != ce) {
goto dynamic;
} else {
wrong:
/* Information was available, but we were denied access. Error out. */
if (!silent) {
zend_bad_property_access(property_info, ce, member);
}
return ZEND_WRONG_PROPERTY_INFO;
}
} else {
ZEND_ASSERT(flags & ZEND_ACC_PROTECTED);
if (UNEXPECTED(!is_protected_compatible_scope(property_info->ce, scope))) {
goto wrong;
}
}
}
}
found:
if (UNEXPECTED(flags & ZEND_ACC_STATIC)) {
if (!silent) {
zend_error(E_NOTICE, "Accessing static property %s::$%s as non static", ZSTR_VAL(ce->name), ZSTR_VAL(member));
}
}
return property_info;
}
/* }}} */
ZEND_API int zend_check_property_access(zend_object *zobj, zend_string *prop_info_name, bool is_dynamic) /* {{{ */
{
zend_property_info *property_info;
const char *class_name = NULL;
const char *prop_name;
zend_string *member;
size_t prop_name_len;
if (ZSTR_VAL(prop_info_name)[0] == 0) {
if (is_dynamic) {
return SUCCESS;
}
zend_unmangle_property_name_ex(prop_info_name, &class_name, &prop_name, &prop_name_len);
member = zend_string_init(prop_name, prop_name_len, 0);
property_info = zend_get_property_info(zobj->ce, member, 1);
zend_string_release_ex(member, 0);
if (property_info == NULL || property_info == ZEND_WRONG_PROPERTY_INFO) {
return FAILURE;
}
if (class_name[0] != '*') {
if (!(property_info->flags & ZEND_ACC_PRIVATE)) {
/* we we're looking for a private prop but found a non private one of the same name */
return FAILURE;
} else if (strcmp(ZSTR_VAL(prop_info_name)+1, ZSTR_VAL(property_info->name)+1)) {
/* we we're looking for a private prop but found a private one of the same name but another class */
return FAILURE;
}
} else {
ZEND_ASSERT(property_info->flags & ZEND_ACC_PROTECTED);
}
return SUCCESS;
} else {
property_info = zend_get_property_info(zobj->ce, prop_info_name, 1);
if (property_info == NULL) {
ZEND_ASSERT(is_dynamic);
return SUCCESS;
} else if (property_info == ZEND_WRONG_PROPERTY_INFO) {
return FAILURE;
}
return (property_info->flags & ZEND_ACC_PUBLIC) ? SUCCESS : FAILURE;
}
}
/* }}} */
static void zend_property_guard_dtor(zval *el) /* {{{ */ {
uint32_t *ptr = (uint32_t*)Z_PTR_P(el);
if (EXPECTED(!(((zend_uintptr_t)ptr) & 1))) {
efree_size(ptr, sizeof(uint32_t));
}
}
/* }}} */
ZEND_API uint32_t *zend_get_property_guard(zend_object *zobj, zend_string *member) /* {{{ */
{
HashTable *guards;
zval *zv;
uint32_t *ptr;
ZEND_ASSERT(zobj->ce->ce_flags & ZEND_ACC_USE_GUARDS);
zv = zobj->properties_table + zobj->ce->default_properties_count;
if (EXPECTED(Z_TYPE_P(zv) == IS_STRING)) {
zend_string *str = Z_STR_P(zv);
if (EXPECTED(str == member) ||
/* str and member don't necessarily have a pre-calculated hash value here */
EXPECTED(zend_string_equal_content(str, member))) {
return &Z_PROPERTY_GUARD_P(zv);
} else if (EXPECTED(Z_PROPERTY_GUARD_P(zv) == 0)) {
zval_ptr_dtor_str(zv);
ZVAL_STR_COPY(zv, member);
return &Z_PROPERTY_GUARD_P(zv);
} else {
ALLOC_HASHTABLE(guards);
zend_hash_init(guards, 8, NULL, zend_property_guard_dtor, 0);
/* mark pointer as "special" using low bit */
zend_hash_add_new_ptr(guards, str,
(void*)(((zend_uintptr_t)&Z_PROPERTY_GUARD_P(zv)) | 1));
zval_ptr_dtor_str(zv);
ZVAL_ARR(zv, guards);
}
} else if (EXPECTED(Z_TYPE_P(zv) == IS_ARRAY)) {
guards = Z_ARRVAL_P(zv);
ZEND_ASSERT(guards != NULL);
zv = zend_hash_find(guards, member);
if (zv != NULL) {
return (uint32_t*)(((zend_uintptr_t)Z_PTR_P(zv)) & ~1);
}
} else {
ZEND_ASSERT(Z_TYPE_P(zv) == IS_UNDEF);
ZVAL_STR_COPY(zv, member);
Z_PROPERTY_GUARD_P(zv) = 0;
return &Z_PROPERTY_GUARD_P(zv);
}
/* we have to allocate uint32_t separately because ht->arData may be reallocated */
ptr = (uint32_t*)emalloc(sizeof(uint32_t));
*ptr = 0;
return (uint32_t*)zend_hash_add_new_ptr(guards, member, ptr);
}
/* }}} */
ZEND_API zval *zend_std_read_property(zend_object *zobj, zend_string *name, int type, void **cache_slot, zval *rv) /* {{{ */
{
zval *retval;
uintptr_t property_offset;
zend_property_info *prop_info = NULL;
uint32_t *guard = NULL;
zend_string *tmp_name = NULL;
#if DEBUG_OBJECT_HANDLERS
fprintf(stderr, "Read object #%d property: %s\n", zobj->handle, ZSTR_VAL(name));
#endif
/* make zend_get_property_info silent if we have getter - we may want to use it */
property_offset = zend_get_property_offset(zobj->ce, name, (type == BP_VAR_IS) || (zobj->ce->__get != NULL), cache_slot, &prop_info);
if (EXPECTED(IS_VALID_PROPERTY_OFFSET(property_offset))) {
retval = OBJ_PROP(zobj, property_offset);
if (EXPECTED(Z_TYPE_P(retval) != IS_UNDEF)) {
if (prop_info && UNEXPECTED(prop_info->flags & ZEND_ACC_READONLY)
&& (type == BP_VAR_W || type == BP_VAR_RW || type == BP_VAR_UNSET)) {
if (Z_TYPE_P(retval) == IS_OBJECT) {
/* 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. */
ZVAL_COPY(rv, retval);
retval = rv;
} else {
zend_readonly_property_modification_error(prop_info);
retval = &EG(uninitialized_zval);
}
}
goto exit;
} else {
if (prop_info && UNEXPECTED(prop_info->flags & ZEND_ACC_READONLY)) {
if (type == BP_VAR_W || type == BP_VAR_RW) {
zend_readonly_property_indirect_modification_error(prop_info);
retval = &EG(uninitialized_zval);
goto exit;
} else if (type == BP_VAR_UNSET) {
retval = &EG(uninitialized_zval);
goto exit;
}
}
}
if (UNEXPECTED(Z_PROP_FLAG_P(retval) == IS_PROP_UNINIT)) {
/* Skip __get() for uninitialized typed properties */
goto uninit_error;
}
} else if (EXPECTED(IS_DYNAMIC_PROPERTY_OFFSET(property_offset))) {
if (EXPECTED(zobj->properties != NULL)) {
if (!IS_UNKNOWN_DYNAMIC_PROPERTY_OFFSET(property_offset)) {
uintptr_t idx = ZEND_DECODE_DYN_PROP_OFFSET(property_offset);
if (EXPECTED(idx < zobj->properties->nNumUsed * sizeof(Bucket))) {
Bucket *p = (Bucket*)((char*)zobj->properties->arData + idx);
if (EXPECTED(Z_TYPE(p->val) != IS_UNDEF) &&
(EXPECTED(p->key == name) ||
(EXPECTED(p->h == ZSTR_H(name)) &&
EXPECTED(p->key != NULL) &&
EXPECTED(zend_string_equal_content(p->key, name))))) {
retval = &p->val;
goto exit;
}
}
CACHE_PTR_EX(cache_slot + 1, (void*)ZEND_DYNAMIC_PROPERTY_OFFSET);
}
retval = zend_hash_find(zobj->properties, name);
if (EXPECTED(retval)) {
if (cache_slot) {
uintptr_t idx = (char*)retval - (char*)zobj->properties->arData;
CACHE_PTR_EX(cache_slot + 1, (void*)ZEND_ENCODE_DYN_PROP_OFFSET(idx));
}
goto exit;
}
}
} else if (UNEXPECTED(EG(exception))) {
retval = &EG(uninitialized_zval);
goto exit;
}
/* magic isset */
if ((type == BP_VAR_IS) && zobj->ce->__isset) {
zval tmp_result;
guard = zend_get_property_guard(zobj, name);
if (!((*guard) & IN_ISSET)) {
if (!tmp_name && !ZSTR_IS_INTERNED(name)) {
tmp_name = zend_string_copy(name);
}
GC_ADDREF(zobj);
ZVAL_UNDEF(&tmp_result);
*guard |= IN_ISSET;
zend_std_call_issetter(zobj, name, &tmp_result);
*guard &= ~IN_ISSET;
if (!zend_is_true(&tmp_result)) {
retval = &EG(uninitialized_zval);
OBJ_RELEASE(zobj);
zval_ptr_dtor(&tmp_result);
goto exit;
}
zval_ptr_dtor(&tmp_result);
if (zobj->ce->__get && !((*guard) & IN_GET)) {
goto call_getter;
}
OBJ_RELEASE(zobj);
} else if (zobj->ce->__get && !((*guard) & IN_GET)) {
goto call_getter_addref;
}
} else if (zobj->ce->__get) {
/* magic get */
guard = zend_get_property_guard(zobj, name);
if (!((*guard) & IN_GET)) {
/* have getter - try with it! */
call_getter_addref:
GC_ADDREF(zobj);
call_getter:
*guard |= IN_GET; /* prevent circular getting */
zend_std_call_getter(zobj, name, rv);
*guard &= ~IN_GET;
if (Z_TYPE_P(rv) != IS_UNDEF) {
retval = rv;
if (!Z_ISREF_P(rv) &&
(type == BP_VAR_W || type == BP_VAR_RW || type == BP_VAR_UNSET)) {
if (UNEXPECTED(Z_TYPE_P(rv) != IS_OBJECT)) {
zend_error(E_NOTICE, "Indirect modification of overloaded property %s::$%s has no effect", ZSTR_VAL(zobj->ce->name), ZSTR_VAL(name));
}
}
} else {
retval = &EG(uninitialized_zval);
}
if (UNEXPECTED(prop_info)) {
zend_verify_prop_assignable_by_ref(prop_info, retval, (zobj->ce->__get->common.fn_flags & ZEND_ACC_STRICT_TYPES) != 0);
}
OBJ_RELEASE(zobj);
goto exit;
} else if (UNEXPECTED(IS_WRONG_PROPERTY_OFFSET(property_offset))) {
/* Trigger the correct error */
zend_get_property_offset(zobj->ce, name, 0, NULL, &prop_info);
ZEND_ASSERT(EG(exception));
retval = &EG(uninitialized_zval);
goto exit;
}
}
uninit_error:
if (type != BP_VAR_IS) {
if (UNEXPECTED(prop_info)) {
zend_throw_error(NULL, "Typed property %s::$%s must not be accessed before initialization",
ZSTR_VAL(prop_info->ce->name),
ZSTR_VAL(name));
} else {
zend_error(E_WARNING, "Undefined property: %s::$%s", ZSTR_VAL(zobj->ce->name), ZSTR_VAL(name));
}
}
retval = &EG(uninitialized_zval);
exit:
zend_tmp_string_release(tmp_name);
return retval;
}
/* }}} */
static zend_always_inline bool property_uses_strict_types(void) {
zend_execute_data *execute_data = EG(current_execute_data);
return execute_data
&& execute_data->func
&& ZEND_CALL_USES_STRICT_TYPES(EG(current_execute_data));
}
static bool verify_readonly_initialization_access(
zend_property_info *prop_info, zend_class_entry *ce,
zend_string *name, const char *operation) {
zend_class_entry *scope;
if (UNEXPECTED(EG(fake_scope))) {
scope = EG(fake_scope);
} else {
scope = zend_get_executed_scope();
}
if (prop_info->ce == scope) {
return true;
}
/* We may have redeclared a parent property. In that case the parent should still be
* allowed to initialize it. */
if (scope && is_derived_class(ce, scope)) {
zend_property_info *prop_info = zend_hash_find_ptr(&scope->properties_info, name);
if (prop_info) {
/* This should be ensured by inheritance. */
ZEND_ASSERT(prop_info->flags & ZEND_ACC_READONLY);
if (prop_info->ce == scope) {
return true;
}
}
}
zend_readonly_property_modification_scope_error(prop_info->ce, name, scope, operation);
return false;
}
ZEND_API zval *zend_std_write_property(zend_object *zobj, zend_string *name, zval *value, void **cache_slot) /* {{{ */
{
zval *variable_ptr, tmp;
uintptr_t property_offset;
zend_property_info *prop_info = NULL;
ZEND_ASSERT(!Z_ISREF_P(value));
property_offset = zend_get_property_offset(zobj->ce, name, (zobj->ce->__set != NULL), cache_slot, &prop_info);
if (EXPECTED(IS_VALID_PROPERTY_OFFSET(property_offset))) {
variable_ptr = OBJ_PROP(zobj, property_offset);
if (Z_TYPE_P(variable_ptr) != IS_UNDEF) {
Z_TRY_ADDREF_P(value);
if (UNEXPECTED(prop_info)) {
if (UNEXPECTED(prop_info->flags & ZEND_ACC_READONLY)) {
Z_TRY_DELREF_P(value);
zend_readonly_property_modification_error(prop_info);
variable_ptr = &EG(error_zval);
goto exit;
}
ZVAL_COPY_VALUE(&tmp, value);
if (UNEXPECTED(!zend_verify_property_type(prop_info, &tmp, property_uses_strict_types()))) {
Z_TRY_DELREF_P(value);
variable_ptr = &EG(error_zval);
goto exit;
}
value = &tmp;
}
found:
variable_ptr = zend_assign_to_variable(
variable_ptr, value, IS_TMP_VAR, property_uses_strict_types());
goto exit;
}
if (Z_PROP_FLAG_P(variable_ptr) == IS_PROP_UNINIT) {
/* Writes to uninitialized typed properties bypass __set(). */
goto write_std_property;
}
} else if (EXPECTED(IS_DYNAMIC_PROPERTY_OFFSET(property_offset))) {
if (EXPECTED(zobj->properties != NULL)) {
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);
}
if ((variable_ptr = zend_hash_find(zobj->properties, name)) != NULL) {
Z_TRY_ADDREF_P(value);
goto found;
}
}
} else if (UNEXPECTED(EG(exception))) {
variable_ptr = &EG(error_zval);
goto exit;
}
/* magic set */
if (zobj->ce->__set) {
uint32_t *guard = zend_get_property_guard(zobj, name);
if (!((*guard) & IN_SET)) {
GC_ADDREF(zobj);
(*guard) |= IN_SET; /* prevent circular setting */
zend_std_call_setter(zobj, name, value);
(*guard) &= ~IN_SET;
OBJ_RELEASE(zobj);
variable_ptr = value;
} else if (EXPECTED(!IS_WRONG_PROPERTY_OFFSET(property_offset))) {
goto write_std_property;
} else {
/* Trigger the correct error */
zend_wrong_offset(zobj->ce, name);
ZEND_ASSERT(EG(exception));
variable_ptr = &EG(error_zval);
goto exit;
}
} else {
ZEND_ASSERT(!IS_WRONG_PROPERTY_OFFSET(property_offset));
write_std_property:
if (EXPECTED(IS_VALID_PROPERTY_OFFSET(property_offset))) {
variable_ptr = OBJ_PROP(zobj, property_offset);
Z_TRY_ADDREF_P(value);
if (UNEXPECTED(prop_info)) {
if (UNEXPECTED((prop_info->flags & ZEND_ACC_READONLY)
&& !verify_readonly_initialization_access(prop_info, zobj->ce, name, "initialize"))) {
Z_TRY_DELREF_P(value);
variable_ptr = &EG(error_zval);
goto exit;
}
ZVAL_COPY_VALUE(&tmp, value);
if (UNEXPECTED(!zend_verify_property_type(prop_info, &tmp, property_uses_strict_types()))) {
zval_ptr_dtor(value);
goto exit;
}
value = &tmp;
Z_PROP_FLAG_P(variable_ptr) = 0;
goto found; /* might have been updated via e.g. __toString() */
}
ZVAL_COPY_VALUE(variable_ptr, value);
} else {
if (UNEXPECTED(zobj->ce->ce_flags & ZEND_ACC_NO_DYNAMIC_PROPERTIES)) {
zend_forbidden_dynamic_property(zobj->ce, name);
variable_ptr = &EG(error_zval);
goto exit;
}
Z_TRY_ADDREF_P(value);
if (!zobj->properties) {
rebuild_object_properties(zobj);
}
variable_ptr = zend_hash_add_new(zobj->properties, name, value);
}
}
exit:
return variable_ptr;
}
/* }}} */
static ZEND_COLD zend_never_inline void zend_bad_array_access(zend_class_entry *ce) /* {{{ */
{
zend_throw_error(NULL, "Cannot use object of type %s as array", ZSTR_VAL(ce->name));
}
/* }}} */
ZEND_API zval *zend_std_read_dimension(zend_object *object, zval *offset, int type, zval *rv) /* {{{ */
{
zend_class_entry *ce = object->ce;
zval tmp_offset;
if (EXPECTED(zend_class_implements_interface(ce, zend_ce_arrayaccess) != 0)) {
if (offset == NULL) {
/* [] construct */
ZVAL_NULL(&tmp_offset);
} else {
ZVAL_COPY_DEREF(&tmp_offset, offset);
}
GC_ADDREF(object);
if (type == BP_VAR_IS) {
zend_call_method_with_1_params(object, ce, NULL, "offsetexists", rv, &tmp_offset);
if (UNEXPECTED(Z_ISUNDEF_P(rv))) {
OBJ_RELEASE(object);
zval_ptr_dtor(&tmp_offset);
return NULL;
}
if (!i_zend_is_true(rv)) {
OBJ_RELEASE(object);
zval_ptr_dtor(&tmp_offset);
zval_ptr_dtor(rv);
return &EG(uninitialized_zval);
}
zval_ptr_dtor(rv);
}
zend_call_method_with_1_params(object, ce, NULL, "offsetget", rv, &tmp_offset);
OBJ_RELEASE(object);
zval_ptr_dtor(&tmp_offset);
if (UNEXPECTED(Z_TYPE_P(rv) == IS_UNDEF)) {
if (UNEXPECTED(!EG(exception))) {
zend_throw_error(NULL, "Undefined offset for object of type %s used as array", ZSTR_VAL(ce->name));
}
return NULL;
}
return rv;
} else {
zend_bad_array_access(ce);
return NULL;
}
}
/* }}} */
ZEND_API void zend_std_write_dimension(zend_object *object, zval *offset, zval *value) /* {{{ */
{
zend_class_entry *ce = object->ce;
zval tmp_offset;
if (EXPECTED(zend_class_implements_interface(ce, zend_ce_arrayaccess) != 0)) {
if (!offset) {
ZVAL_NULL(&tmp_offset);
} else {
ZVAL_COPY_DEREF(&tmp_offset, offset);
}
GC_ADDREF(object);
zend_call_method_with_2_params(object, ce, NULL, "offsetset", NULL, &tmp_offset, value);
OBJ_RELEASE(object);
zval_ptr_dtor(&tmp_offset);
} else {
zend_bad_array_access(ce);
}
}
/* }}} */
ZEND_API int zend_std_has_dimension(zend_object *object, zval *offset, int check_empty) /* {{{ */
{
zend_class_entry *ce = object->ce;
zval retval, tmp_offset;
int result;
if (EXPECTED(zend_class_implements_interface(ce, zend_ce_arrayaccess) != 0)) {
ZVAL_COPY_DEREF(&tmp_offset, offset);
GC_ADDREF(object);
zend_call_method_with_1_params(object, ce, NULL, "offsetexists", &retval, &tmp_offset);
result = i_zend_is_true(&retval);
zval_ptr_dtor(&retval);
if (check_empty && result && EXPECTED(!EG(exception))) {
zend_call_method_with_1_params(object, ce, NULL, "offsetget", &retval, &tmp_offset);
result = i_zend_is_true(&retval);
zval_ptr_dtor(&retval);
}
OBJ_RELEASE(object);
zval_ptr_dtor(&tmp_offset);
} else {