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zend_object_handlers.c
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2015 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 |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <[email protected]> |
| Zeev Suraski <[email protected]> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#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_closures.h"
#include "zend_compile.h"
#include "zend_hash.h"
#define DEBUG_OBJECT_HANDLERS 0
/* guard flags */
#define IN_GET (1<<0)
#define IN_SET (1<<1)
#define IN_UNSET (1<<2)
#define IN_ISSET (1<<3)
#define Z_OBJ_PROTECT_RECURSION(zval_p) \
do { \
if (Z_OBJ_APPLY_COUNT_P(zval_p) >= 3) { \
zend_error(E_ERROR, "Nesting level too deep - recursive dependency?"); \
} \
Z_OBJ_INC_APPLY_COUNT_P(zval_p); \
} while (0)
#define Z_OBJ_UNPROTECT_RECURSION(zval_p) \
Z_OBJ_DEC_APPLY_COUNT_P(zval_p)
/*
__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;
ALLOC_HASHTABLE(zobj->properties);
zend_hash_init(zobj->properties, ce->default_properties_count, NULL, ZVAL_PTR_DTOR, 0);
if (ce->default_properties_count) {
ZEND_HASH_FOREACH_PTR(&ce->properties_info, prop_info) {
if (/*prop_info->ce == ce &&*/
(prop_info->flags & ZEND_ACC_STATIC) == 0 &&
Z_TYPE_P(OBJ_PROP(zobj, prop_info->offset)) != IS_UNDEF) {
zval zv;
ZVAL_INDIRECT(&zv, OBJ_PROP(zobj, prop_info->offset));
zend_hash_add_new(zobj->properties, prop_info->name, &zv);
}
} ZEND_HASH_FOREACH_END();
while (ce->parent && ce->parent->default_properties_count) {
ce = ce->parent;
ZEND_HASH_FOREACH_PTR(&ce->properties_info, prop_info) {
if (prop_info->ce == ce &&
(prop_info->flags & ZEND_ACC_STATIC) == 0 &&
(prop_info->flags & ZEND_ACC_PRIVATE) != 0 &&
Z_TYPE_P(OBJ_PROP(zobj, prop_info->offset)) != IS_UNDEF) {
zval zv;
ZVAL_INDIRECT(&zv, OBJ_PROP(zobj, prop_info->offset));
zend_hash_add(zobj->properties, prop_info->name, &zv);
}
} ZEND_HASH_FOREACH_END();
}
}
}
}
/* }}} */
ZEND_API HashTable *zend_std_get_properties(zval *object) /* {{{ */
{
zend_object *zobj;
zobj = Z_OBJ_P(object);
if (!zobj->properties) {
rebuild_object_properties(zobj);
}
return zobj->properties;
}
/* }}} */
ZEND_API HashTable *zend_std_get_gc(zval *object, zval **table, int *n) /* {{{ */
{
if (Z_OBJ_HANDLER_P(object, get_properties) != zend_std_get_properties) {
*table = NULL;
*n = 0;
return Z_OBJ_HANDLER_P(object, get_properties)(object);
} else {
zend_object *zobj = Z_OBJ_P(object);
*table = zobj->properties_table;
*n = zobj->ce->default_properties_count;
return zobj->properties;
}
}
/* }}} */
ZEND_API HashTable *zend_std_get_debug_info(zval *object, int *is_temp) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
zval retval;
HashTable *ht;
if (!ce->__debugInfo) {
*is_temp = 0;
return Z_OBJ_HANDLER_P(object, get_properties)
? Z_OBJ_HANDLER_P(object, get_properties)(object)
: NULL;
}
zend_call_method_with_0_params(object, ce, &ce->__debugInfo, ZEND_DEBUGINFO_FUNC_NAME, &retval);
if (Z_TYPE(retval) == IS_ARRAY) {
if (Z_IMMUTABLE(retval)) {
*is_temp = 1;
ALLOC_HASHTABLE(ht);
zend_array_dup(ht, Z_ARRVAL(retval));
return ht;
} else if (Z_REFCOUNT(retval) <= 1) {
*is_temp = 1;
ALLOC_HASHTABLE(ht);
*ht = *Z_ARRVAL(retval);
efree_size(Z_ARR(retval), sizeof(zend_array));
return ht;
} else {
*is_temp = 0;
zval_ptr_dtor(&retval);
return Z_ARRVAL(retval);
}
} else if (Z_TYPE(retval) == IS_NULL) {
*is_temp = 1;
ALLOC_HASHTABLE(ht);
zend_hash_init(ht, 0, NULL, ZVAL_PTR_DTOR, 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(zval *object, zval *member, zval *retval) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
/* __get handler is called with one argument:
property name
it should return whether the call was successful or not
*/
if (Z_REFCOUNTED_P(member)) Z_ADDREF_P(member);
zend_call_method_with_1_params(object, ce, &ce->__get, ZEND_GET_FUNC_NAME, retval, member);
zval_ptr_dtor(member);
}
/* }}} */
static int zend_std_call_setter(zval *object, zval *member, zval *value) /* {{{ */
{
zval retval;
int result;
zend_class_entry *ce = Z_OBJCE_P(object);
if (Z_REFCOUNTED_P(member)) Z_ADDREF_P(member);
if (Z_REFCOUNTED_P(value)) Z_ADDREF_P(value);
/* __set handler is called with two arguments:
property name
value to be set
it should return whether the call was successful or not
*/
zend_call_method_with_2_params(object, ce, &ce->__set, ZEND_SET_FUNC_NAME, &retval, member, value);
zval_ptr_dtor(member);
zval_ptr_dtor(value);
if (Z_TYPE(retval) != IS_UNDEF) {
result = i_zend_is_true(&retval) ? SUCCESS : FAILURE;
zval_ptr_dtor(&retval);
return result;
} else {
return FAILURE;
}
}
/* }}} */
static void zend_std_call_unsetter(zval *object, zval *member) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
/* __unset handler is called with one argument:
property name
*/
if (Z_REFCOUNTED_P(member)) Z_ADDREF_P(member);
zend_call_method_with_1_params(object, ce, &ce->__unset, ZEND_UNSET_FUNC_NAME, NULL, member);
zval_ptr_dtor(member);
}
/* }}} */
static void zend_std_call_issetter(zval *object, zval *member, zval *retval) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
/* __isset handler is called with one argument:
property name
it should return whether the property is set or not
*/
if (Z_REFCOUNTED_P(member)) Z_ADDREF_P(member);
zend_call_method_with_1_params(object, ce, &ce->__isset, ZEND_ISSET_FUNC_NAME, retval, member);
zval_ptr_dtor(member);
}
/* }}} */
static zend_always_inline int zend_verify_property_access(zend_property_info *property_info, zend_class_entry *ce) /* {{{ */
{
switch (property_info->flags & ZEND_ACC_PPP_MASK) {
case ZEND_ACC_PUBLIC:
return 1;
case ZEND_ACC_PROTECTED:
return zend_check_protected(property_info->ce, EG(scope));
case ZEND_ACC_PRIVATE:
return (ce == EG(scope) || property_info->ce == EG(scope));
}
return 0;
}
/* }}} */
static zend_always_inline zend_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_always_inline uint32_t zend_get_property_offset(zend_class_entry *ce, zend_string *member, int silent, void **cache_slot) /* {{{ */
{
zval *zv;
zend_property_info *property_info = NULL;
uint32_t flags;
if (cache_slot && EXPECTED(ce == CACHED_PTR_EX(cache_slot))) {
return (uint32_t)(intptr_t)CACHED_PTR_EX(cache_slot + 1);
}
if (UNEXPECTED(member->val[0] == '\0')) {
if (!silent) {
if (member->len == 0) {
zend_error_noreturn(E_ERROR, "Cannot access empty property");
} else {
zend_error_noreturn(E_ERROR, "Cannot access property started with '\\0'");
}
}
return ZEND_WRONG_PROPERTY_OFFSET;
}
if (UNEXPECTED(zend_hash_num_elements(&ce->properties_info) == 0)) {
goto exit_dynamic;
}
zv = zend_hash_find(&ce->properties_info, member);
if (EXPECTED(zv != NULL)) {
property_info = (zend_property_info*)Z_PTR_P(zv);
flags = property_info->flags;
if (UNEXPECTED((flags & ZEND_ACC_SHADOW) != 0)) {
/* if it's a shadow - go to access it's private */
property_info = NULL;
} else {
if (EXPECTED(zend_verify_property_access(property_info, ce) != 0)) {
if (UNEXPECTED(!(flags & ZEND_ACC_CHANGED))
|| UNEXPECTED((flags & ZEND_ACC_PRIVATE))) {
if (UNEXPECTED((flags & ZEND_ACC_STATIC) != 0)) {
if (!silent) {
zend_error(E_STRICT, "Accessing static property %s::$%s as non static", ce->name->val, member->val);
}
return ZEND_DYNAMIC_PROPERTY_OFFSET;
}
goto exit;
}
} else {
/* Try to look in the scope instead */
property_info = ZEND_WRONG_PROPERTY_INFO;
}
}
}
if (EG(scope) != ce
&& EG(scope)
&& is_derived_class(ce, EG(scope))
&& (zv = zend_hash_find(&EG(scope)->properties_info, member)) != NULL
&& ((zend_property_info*)Z_PTR_P(zv))->flags & ZEND_ACC_PRIVATE) {
property_info = (zend_property_info*)Z_PTR_P(zv);
if (UNEXPECTED((property_info->flags & ZEND_ACC_STATIC) != 0)) {
return ZEND_DYNAMIC_PROPERTY_OFFSET;
}
} else if (UNEXPECTED(property_info == NULL)) {
exit_dynamic:
if (cache_slot) {
CACHE_POLYMORPHIC_PTR_EX(cache_slot, ce, (void*)(intptr_t)ZEND_DYNAMIC_PROPERTY_OFFSET);
}
return ZEND_DYNAMIC_PROPERTY_OFFSET;
} else if (UNEXPECTED(property_info == ZEND_WRONG_PROPERTY_INFO)) {
/* Information was available, but we were denied access. Error out. */
if (!silent) {
zend_error_noreturn(E_ERROR, "Cannot access %s property %s::$%s", zend_visibility_string(flags), ce->name->val, member->val);
}
return ZEND_WRONG_PROPERTY_OFFSET;
}
exit:
if (cache_slot) {
CACHE_POLYMORPHIC_PTR_EX(cache_slot, ce, (void*)(intptr_t)property_info->offset);
}
return property_info->offset;
}
/* }}} */
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 = NULL;
uint32_t flags;
if (UNEXPECTED(member->val[0] == '\0')) {
if (!silent) {
if (member->len == 0) {
zend_error_noreturn(E_ERROR, "Cannot access empty property");
} else {
zend_error_noreturn(E_ERROR, "Cannot access property started with '\\0'");
}
}
return ZEND_WRONG_PROPERTY_INFO;
}
if (UNEXPECTED(zend_hash_num_elements(&ce->properties_info) == 0)) {
goto exit_dynamic;
}
zv = zend_hash_find(&ce->properties_info, member);
if (EXPECTED(zv != NULL)) {
property_info = (zend_property_info*)Z_PTR_P(zv);
flags = property_info->flags;
if (UNEXPECTED((flags & ZEND_ACC_SHADOW) != 0)) {
/* if it's a shadow - go to access it's private */
property_info = NULL;
} else {
if (EXPECTED(zend_verify_property_access(property_info, ce) != 0)) {
if (UNEXPECTED(!(flags & ZEND_ACC_CHANGED))
|| UNEXPECTED((flags & ZEND_ACC_PRIVATE))) {
if (UNEXPECTED((flags & ZEND_ACC_STATIC) != 0)) {
if (!silent) {
zend_error(E_STRICT, "Accessing static property %s::$%s as non static", ce->name->val, member->val);
}
}
goto exit;
}
} else {
/* Try to look in the scope instead */
property_info = ZEND_WRONG_PROPERTY_INFO;
}
}
}
if (EG(scope) != ce
&& EG(scope)
&& is_derived_class(ce, EG(scope))
&& (zv = zend_hash_find(&EG(scope)->properties_info, member)) != NULL
&& ((zend_property_info*)Z_PTR_P(zv))->flags & ZEND_ACC_PRIVATE) {
property_info = (zend_property_info*)Z_PTR_P(zv);
} else if (UNEXPECTED(property_info == NULL)) {
exit_dynamic:
return NULL;
} else if (UNEXPECTED(property_info == ZEND_WRONG_PROPERTY_INFO)) {
/* Information was available, but we were denied access. Error out. */
if (!silent) {
zend_error_noreturn(E_ERROR, "Cannot access %s property %s::$%s", zend_visibility_string(flags), ce->name->val, member->val);
}
return ZEND_WRONG_PROPERTY_INFO;
}
exit:
return property_info;
}
/* }}} */
ZEND_API int zend_check_property_access(zend_object *zobj, zend_string *prop_info_name) /* {{{ */
{
zend_property_info *property_info;
const char *class_name = NULL;
const char *prop_name;
zend_string *member;
size_t prop_name_len;
if (prop_info_name->val[0] == 0) {
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);
} else {
member = zend_string_copy(prop_info_name);
}
property_info = zend_get_property_info(zobj->ce, member, 1);
zend_string_release(member);
if (property_info == NULL) {
/* undefined public property */
if (class_name && class_name[0] != '*') {
/* we we're looking for a private prop */
return FAILURE;
}
return SUCCESS;
} else if (property_info == ZEND_WRONG_PROPERTY_INFO) {
return FAILURE;
}
if (class_name && 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(prop_info_name->val+1, property_info->name->val+1)) {
/* we we're looking for a private prop but found a private one of the same name but another class */
return FAILURE;
}
}
return zend_verify_property_access(property_info, zobj->ce) ? SUCCESS : FAILURE;
}
/* }}} */
static zend_long *zend_get_property_guard(zend_object *zobj, zend_string *member) /* {{{ */
{
zval stub, *guard;
if (!zobj->guards) {
ALLOC_HASHTABLE(zobj->guards);
zend_hash_init(zobj->guards, 8, NULL, NULL, 0);
} else if ((guard = zend_hash_find(zobj->guards, member)) != NULL) {
return &Z_LVAL_P(guard);
}
ZVAL_LONG(&stub, 0);
guard = zend_hash_add_new(zobj->guards, member, &stub);
return &Z_LVAL_P(guard);
}
/* }}} */
zval *zend_std_read_property(zval *object, zval *member, int type, void **cache_slot, zval *rv) /* {{{ */
{
zend_object *zobj;
zval tmp_member;
zval *retval;
uint32_t property_offset;
zobj = Z_OBJ_P(object);
ZVAL_UNDEF(&tmp_member);
if (UNEXPECTED(Z_TYPE_P(member) != IS_STRING)) {
ZVAL_STR(&tmp_member, zval_get_string(member));
member = &tmp_member;
cache_slot = NULL;
}
#if DEBUG_OBJECT_HANDLERS
fprintf(stderr, "Read object #%d property: %s\n", Z_OBJ_HANDLE_P(object), Z_STRVAL_P(member));
#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, Z_STR_P(member), (type == BP_VAR_IS) || (zobj->ce->__get != NULL), cache_slot);
if (EXPECTED(property_offset != ZEND_WRONG_PROPERTY_OFFSET)) {
if (EXPECTED(property_offset != ZEND_DYNAMIC_PROPERTY_OFFSET)) {
retval = OBJ_PROP(zobj, property_offset);
if (EXPECTED(Z_TYPE_P(retval) != IS_UNDEF)) {
goto exit;
}
} else if (EXPECTED(zobj->properties != NULL)) {
retval = zend_hash_find(zobj->properties, Z_STR_P(member));
if (EXPECTED(retval)) goto exit;
}
}
/* magic get */
if (zobj->ce->__get) {
zend_long *guard = zend_get_property_guard(zobj, Z_STR_P(member));
if (!((*guard) & IN_GET)) {
zval tmp_object;
/* have getter - try with it! */
ZVAL_COPY(&tmp_object, object);
*guard |= IN_GET; /* prevent circular getting */
zend_std_call_getter(&tmp_object, member, 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)) {
SEPARATE_ZVAL(rv);
if (UNEXPECTED(Z_TYPE_P(rv) != IS_OBJECT)) {
zend_error(E_NOTICE, "Indirect modification of overloaded property %s::$%s has no effect", zobj->ce->name->val, Z_STRVAL_P(member));
}
}
} else {
retval = &EG(uninitialized_zval);
}
zval_ptr_dtor(&tmp_object);
goto exit;
} else {
if (Z_STRVAL_P(member)[0] == '\0') {
if (Z_STRLEN_P(member) == 0) {
zend_error(E_ERROR, "Cannot access empty property");
} else {
zend_error(E_ERROR, "Cannot access property started with '\\0'");
}
}
}
}
if ((type != BP_VAR_IS)) {
zend_error(E_NOTICE,"Undefined property: %s::$%s", zobj->ce->name->val, Z_STRVAL_P(member));
}
retval = &EG(uninitialized_zval);
exit:
if (UNEXPECTED(Z_TYPE(tmp_member) != IS_UNDEF)) {
if (Z_REFCOUNTED_P(retval)) Z_ADDREF_P(retval);
zval_ptr_dtor(&tmp_member);
if (Z_REFCOUNTED_P(retval)) Z_DELREF_P(retval);
}
return retval;
}
/* }}} */
ZEND_API void zend_std_write_property(zval *object, zval *member, zval *value, void **cache_slot) /* {{{ */
{
zend_object *zobj;
zval tmp_member;
zval *variable_ptr;
uint32_t property_offset;
zobj = Z_OBJ_P(object);
ZVAL_UNDEF(&tmp_member);
if (UNEXPECTED(Z_TYPE_P(member) != IS_STRING)) {
ZVAL_STR(&tmp_member, zval_get_string(member));
member = &tmp_member;
cache_slot = NULL;
}
property_offset = zend_get_property_offset(zobj->ce, Z_STR_P(member), (zobj->ce->__set != NULL), cache_slot);
if (EXPECTED(property_offset != ZEND_WRONG_PROPERTY_OFFSET)) {
if (EXPECTED(property_offset != ZEND_DYNAMIC_PROPERTY_OFFSET)) {
variable_ptr = OBJ_PROP(zobj, property_offset);
if (Z_TYPE_P(variable_ptr) != IS_UNDEF) {
goto found;
}
} else if (EXPECTED(zobj->properties != NULL)) {
if ((variable_ptr = zend_hash_find(zobj->properties, Z_STR_P(member))) != NULL) {
found:
zend_assign_to_variable(variable_ptr, value, (IS_VAR|IS_TMP_VAR));
goto exit;
}
}
}
/* magic set */
if (zobj->ce->__set) {
zend_long *guard = zend_get_property_guard(zobj, Z_STR_P(member));
if (!((*guard) & IN_SET)) {
zval tmp_object;
ZVAL_COPY(&tmp_object, object);
(*guard) |= IN_SET; /* prevent circular setting */
if (zend_std_call_setter(&tmp_object, member, value) != SUCCESS) {
/* for now, just ignore it - __set should take care of warnings, etc. */
}
(*guard) &= ~IN_SET;
zval_ptr_dtor(&tmp_object);
} else if (EXPECTED(property_offset != ZEND_WRONG_PROPERTY_OFFSET)) {
goto write_std_property;
} else {
if (Z_STRVAL_P(member)[0] == '\0') {
if (Z_STRLEN_P(member) == 0) {
zend_error(E_ERROR, "Cannot access empty property");
} else {
zend_error(E_ERROR, "Cannot access property started with '\\0'");
}
}
}
} else if (EXPECTED(property_offset != ZEND_WRONG_PROPERTY_OFFSET)) {
zval tmp;
write_std_property:
if (Z_REFCOUNTED_P(value)) {
if (Z_ISREF_P(value)) {
/* if we assign referenced variable, we should separate it */
ZVAL_DUP(&tmp, Z_REFVAL_P(value));
value = &tmp;
} else {
Z_ADDREF_P(value);
}
}
if (EXPECTED(property_offset != ZEND_DYNAMIC_PROPERTY_OFFSET)) {
ZVAL_COPY_VALUE(OBJ_PROP(zobj, property_offset), value);
} else {
if (!zobj->properties) {
rebuild_object_properties(zobj);
}
zend_hash_add_new(zobj->properties, Z_STR_P(member), value);
}
}
exit:
if (UNEXPECTED(Z_TYPE(tmp_member) != IS_UNDEF)) {
zval_ptr_dtor(&tmp_member);
}
}
/* }}} */
zval *zend_std_read_dimension(zval *object, zval *offset, int type, zval *rv) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
zval tmp;
if (EXPECTED(instanceof_function_ex(ce, zend_ce_arrayaccess, 1) != 0)) {
if(offset == NULL) {
/* [] construct */
ZVAL_UNDEF(&tmp);
offset = &tmp;
} else {
SEPARATE_ARG_IF_REF(offset);
}
zend_call_method_with_1_params(object, ce, NULL, "offsetget", rv, offset);
zval_ptr_dtor(offset);
if (UNEXPECTED(Z_TYPE_P(rv) == IS_UNDEF)) {
if (UNEXPECTED(!EG(exception))) {
zend_error_noreturn(E_ERROR, "Undefined offset for object of type %s used as array", ce->name->val);
}
return NULL;
}
return rv;
} else {
zend_error_noreturn(E_ERROR, "Cannot use object of type %s as array", ce->name->val);
return NULL;
}
}
/* }}} */
static void zend_std_write_dimension(zval *object, zval *offset, zval *value) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
zval tmp;
if (EXPECTED(instanceof_function_ex(ce, zend_ce_arrayaccess, 1) != 0)) {
if (!offset) {
ZVAL_NULL(&tmp);
offset = &tmp;
} else {
SEPARATE_ARG_IF_REF(offset);
}
zend_call_method_with_2_params(object, ce, NULL, "offsetset", NULL, offset, value);
zval_ptr_dtor(offset);
} else {
zend_error_noreturn(E_ERROR, "Cannot use object of type %s as array", ce->name->val);
}
}
/* }}} */
static int zend_std_has_dimension(zval *object, zval *offset, int check_empty) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
zval retval;
int result;
if (EXPECTED(instanceof_function_ex(ce, zend_ce_arrayaccess, 1) != 0)) {
SEPARATE_ARG_IF_REF(offset);
zend_call_method_with_1_params(object, ce, NULL, "offsetexists", &retval, offset);
if (EXPECTED(Z_TYPE(retval) != IS_UNDEF)) {
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, offset);
if (EXPECTED(Z_TYPE(retval) != IS_UNDEF)) {
result = i_zend_is_true(&retval);
zval_ptr_dtor(&retval);
}
}
} else {
result = 0;
}
zval_ptr_dtor(offset);
} else {
zend_error_noreturn(E_ERROR, "Cannot use object of type %s as array", ce->name->val);
return 0;
}
return result;
}
/* }}} */
static zval *zend_std_get_property_ptr_ptr(zval *object, zval *member, int type, void **cache_slot) /* {{{ */
{
zend_object *zobj;
zend_string *name;
zval *retval = NULL;
uint32_t property_offset;
zobj = Z_OBJ_P(object);
if (EXPECTED(Z_TYPE_P(member) == IS_STRING)) {
name = Z_STR_P(member);
} else {
name = zval_get_string(member);
}
#if DEBUG_OBJECT_HANDLERS
fprintf(stderr, "Ptr object #%d property: %s\n", Z_OBJ_HANDLE_P(object), name->val);
#endif
property_offset = zend_get_property_offset(zobj->ce, name, (zobj->ce->__get != NULL), cache_slot);
if (EXPECTED(property_offset != ZEND_WRONG_PROPERTY_OFFSET)) {
if (EXPECTED(property_offset != ZEND_DYNAMIC_PROPERTY_OFFSET)) {
retval = OBJ_PROP(zobj, property_offset);
if (UNEXPECTED(Z_TYPE_P(retval) == IS_UNDEF)) {
if (EXPECTED(!zobj->ce->__get) ||
UNEXPECTED((*zend_get_property_guard(zobj, name)) & IN_GET)) {
ZVAL_NULL(retval);
/* Notice is thrown after creation of the property, to avoid EG(std_property_info)
* being overwritten in an error handler. */
if (UNEXPECTED(type == BP_VAR_RW || type == BP_VAR_R)) {
zend_error(E_NOTICE, "Undefined property: %s::$%s", zobj->ce->name->val, name->val);
}
} else {
/* we do have getter - fail and let it try again with usual get/set */
retval = NULL;
}
}
} else {
if (UNEXPECTED(!zobj->properties) ||
UNEXPECTED((retval = zend_hash_find(zobj->properties, name)) == NULL)) {
if (EXPECTED(!zobj->ce->__get) ||
UNEXPECTED((*zend_get_property_guard(zobj, name)) & IN_GET)) {
if (UNEXPECTED(!zobj->properties)) {
rebuild_object_properties(zobj);
}
retval = zend_hash_update(zobj->properties, name, &EG(uninitialized_zval));
/* Notice is thrown after creation of the property, to avoid EG(std_property_info)
* being overwritten in an error handler. */
if (UNEXPECTED(type == BP_VAR_RW || type == BP_VAR_R)) {
zend_error(E_NOTICE, "Undefined property: %s::$%s", zobj->ce->name->val, name->val);
}
}
}
}
}
if (UNEXPECTED(Z_TYPE_P(member) != IS_STRING)) {
zend_string_release(name);
}
return retval;
}
/* }}} */
static void zend_std_unset_property(zval *object, zval *member, void **cache_slot) /* {{{ */
{
zend_object *zobj;
zval tmp_member;
uint32_t property_offset;
zobj = Z_OBJ_P(object);
ZVAL_UNDEF(&tmp_member);
if (UNEXPECTED(Z_TYPE_P(member) != IS_STRING)) {
ZVAL_STR(&tmp_member, zval_get_string(member));
member = &tmp_member;
cache_slot = NULL;
}
property_offset = zend_get_property_offset(zobj->ce, Z_STR_P(member), (zobj->ce->__unset != NULL), cache_slot);
if (EXPECTED(property_offset != ZEND_WRONG_PROPERTY_OFFSET)) {
if (EXPECTED(property_offset != ZEND_DYNAMIC_PROPERTY_OFFSET)) {
zval *slot = OBJ_PROP(zobj, property_offset);
if (Z_TYPE_P(slot) != IS_UNDEF) {
zval_ptr_dtor(slot);
ZVAL_UNDEF(slot);
goto exit;
}
} else if (EXPECTED(zobj->properties != NULL) &&
EXPECTED(zend_hash_del(zobj->properties, Z_STR_P(member)) != FAILURE)) {
goto exit;
}
}
/* magic unset */
if (zobj->ce->__unset) {
zend_long *guard = zend_get_property_guard(zobj, Z_STR_P(member));
if (!((*guard) & IN_UNSET)) {
zval tmp_object;
/* have unseter - try with it! */
ZVAL_COPY(&tmp_object, object);
(*guard) |= IN_UNSET; /* prevent circular unsetting */
zend_std_call_unsetter(&tmp_object, member);
(*guard) &= ~IN_UNSET;
zval_ptr_dtor(&tmp_object);
} else {
if (Z_STRVAL_P(member)[0] == '\0') {
if (Z_STRLEN_P(member) == 0) {
zend_error(E_ERROR, "Cannot access empty property");
} else {
zend_error(E_ERROR, "Cannot access property started with '\\0'");
}
}
}
}
exit:
if (UNEXPECTED(Z_TYPE(tmp_member) != IS_NULL)) {
zval_ptr_dtor(&tmp_member);
}
}
/* }}} */
static void zend_std_unset_dimension(zval *object, zval *offset) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
if (instanceof_function_ex(ce, zend_ce_arrayaccess, 1)) {
SEPARATE_ARG_IF_REF(offset);
zend_call_method_with_1_params(object, ce, NULL, "offsetunset", NULL, offset);
zval_ptr_dtor(offset);
} else {
zend_error_noreturn(E_ERROR, "Cannot use object of type %s as array", ce->name->val);
}
}
/* }}} */
ZEND_API void zend_std_call_user_call(INTERNAL_FUNCTION_PARAMETERS) /* {{{ */
{
zend_internal_function *func = (zend_internal_function *)EX(func);
zval method_name, method_args;
zval method_result;
zend_class_entry *ce = Z_OBJCE_P(getThis());
array_init_size(&method_args, ZEND_NUM_ARGS());
if (UNEXPECTED(zend_copy_parameters_array(ZEND_NUM_ARGS(), &method_args) == FAILURE)) {
zval_dtor(&method_args);
zend_error_noreturn(E_ERROR, "Cannot get arguments for __call");
RETURN_FALSE;
}
ZVAL_STR(&method_name, func->function_name); /* no dup - it's a copy */
/* __call handler is called with two arguments:
method name
array of method parameters
*/
zend_call_method_with_2_params(getThis(), ce, &ce->__call, ZEND_CALL_FUNC_NAME, &method_result, &method_name, &method_args);
if (Z_TYPE(method_result) != IS_UNDEF) {
RETVAL_ZVAL_FAST(&method_result);
zval_ptr_dtor(&method_result);
}
/* now destruct all auxiliaries */
zval_ptr_dtor(&method_args);
zval_ptr_dtor(&method_name);
/* destruct the function also, then - we have allocated it in get_method */
efree_size(func, sizeof(zend_internal_function));
}
/* }}} */
/* Ensures that we're allowed to call a private method.
* Returns the function address that should be called, or NULL
* if no such function exists.
*/
static inline zend_function *zend_check_private_int(zend_function *fbc, zend_class_entry *ce, zend_string *function_name) /* {{{ */
{
zval *func;
if (!ce) {
return 0;
}
/* We may call a private function if:
* 1. The class of our object is the same as the scope, and the private
* function (EX(fbc)) has the same scope.
* 2. One of our parent classes are the same as the scope, and it contains
* a private function with the same name that has the same scope.
*/
if (fbc->common.scope == ce && EG(scope) == ce) {
/* rule #1 checks out ok, allow the function call */
return fbc;
}
/* Check rule #2 */
ce = ce->parent;
while (ce) {
if (ce == EG(scope)) {
if ((func = zend_hash_find(&ce->function_table, function_name))) {
fbc = Z_FUNC_P(func);
if (fbc->common.fn_flags & ZEND_ACC_PRIVATE
&& fbc->common.scope == EG(scope)) {
return fbc;
}
}
break;
}
ce = ce->parent;
}
return NULL;
}
/* }}} */
ZEND_API int zend_check_private(zend_function *fbc, zend_class_entry *ce, zend_string *function_name) /* {{{ */
{
return zend_check_private_int(fbc, ce, function_name) != NULL;
}
/* }}} */
/* Ensures that we're allowed to call a protected method.
*/
ZEND_API int zend_check_protected(zend_class_entry *ce, zend_class_entry *scope) /* {{{ */
{
zend_class_entry *fbc_scope = ce;
/* Is the context that's calling the function, the same as one of
* the function's parents?
*/
while (fbc_scope) {
if (fbc_scope==scope) {
return 1;
}
fbc_scope = fbc_scope->parent;
}
/* Is the function's scope the same as our current object context,
* or any of the parents of our context?
*/
while (scope) {
if (scope==ce) {
return 1;
}
scope = scope->parent;