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php-src/Zend/zend_object_handlers.c
Dmitry Stogov c4fa7345dc Removed useless separation
2018-01-17 03:00:11 +03:00

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2018 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
| Dmitry Stogov <dmitry@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#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;
zobj->properties = zend_new_array(ce->default_properties_count);
if (ce->default_properties_count) {
zend_hash_real_init(zobj->properties, 0);
zobj->properties->nInternalPointer = 0;
ZEND_HASH_FOREACH_PTR(&ce->properties_info, prop_info) {
if (/*prop_info->ce == ce &&*/
(prop_info->flags & ZEND_ACC_STATIC) == 0) {
if (UNEXPECTED(Z_TYPE_P(OBJ_PROP(zobj, prop_info->offset)) == IS_UNDEF)) {
zobj->properties->u.v.flags |= HASH_FLAG_HAS_EMPTY_IND;
}
_zend_hash_append_ind(zobj->properties, prop_info->name,
OBJ_PROP(zobj, prop_info->offset));
}
} 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) {
zval zv;
if (UNEXPECTED(Z_TYPE_P(OBJ_PROP(zobj, prop_info->offset)) == IS_UNDEF)) {
zobj->properties->u.v.flags |= HASH_FLAG_HAS_EMPTY_IND;
}
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);
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(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_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(zval *object, zval *member, zval *retval) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
zend_class_entry *orig_fake_scope = EG(fake_scope);
EG(fake_scope) = NULL;
/* __get handler is called with one argument:
property name
it should return whether the call was successful or not
*/
zend_call_method_with_1_params(object, ce, &ce->__get, ZEND_GET_FUNC_NAME, retval, member);
EG(fake_scope) = orig_fake_scope;
}
/* }}} */
static void zend_std_call_setter(zval *object, zval *member, zval *value) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
zend_class_entry *orig_fake_scope = EG(fake_scope);
EG(fake_scope) = NULL;
/* __set handler is called with two arguments:
property name
value to be set
*/
zend_call_method_with_2_params(object, ce, &ce->__set, ZEND_SET_FUNC_NAME, NULL, member, value);
EG(fake_scope) = orig_fake_scope;
}
/* }}} */
static void zend_std_call_unsetter(zval *object, zval *member) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
zend_class_entry *orig_fake_scope = EG(fake_scope);
EG(fake_scope) = NULL;
/* __unset handler is called with one argument:
property name
*/
zend_call_method_with_1_params(object, ce, &ce->__unset, ZEND_UNSET_FUNC_NAME, NULL, member);
EG(fake_scope) = orig_fake_scope;
}
/* }}} */
static void zend_std_call_issetter(zval *object, zval *member, zval *retval) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
zend_class_entry *orig_fake_scope = EG(fake_scope);
EG(fake_scope) = NULL;
/* __isset handler is called with one argument:
property name
it should return whether the property is set or not
*/
zend_call_method_with_1_params(object, ce, &ce->__isset, ZEND_ISSET_FUNC_NAME, retval, member);
EG(fake_scope) = orig_fake_scope;
}
/* }}} */
static zend_always_inline int zend_verify_property_access(zend_property_info *property_info, zend_class_entry *ce) /* {{{ */
{
zend_class_entry *scope;
if (property_info->flags & ZEND_ACC_PUBLIC) {
return 1;
} else if (property_info->flags & ZEND_ACC_PRIVATE) {
if (EG(fake_scope)) {
scope = EG(fake_scope);
} else {
scope = zend_get_executed_scope();
}
return (ce == scope || property_info->ce == scope);
} else if (property_info->flags & ZEND_ACC_PROTECTED) {
if (EG(fake_scope)) {
scope = EG(fake_scope);
} else {
scope = zend_get_executed_scope();
}
return zend_check_protected(property_info->ce, 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 uintptr_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;
zend_class_entry *scope;
if (cache_slot && EXPECTED(ce == CACHED_PTR_EX(cache_slot))) {
return (uintptr_t)CACHED_PTR_EX(cache_slot + 1);
}
if (UNEXPECTED(ZSTR_VAL(member)[0] == '\0' && ZSTR_LEN(member) != 0)) {
if (!silent) {
zend_throw_error(NULL, "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_NOTICE, "Accessing static property %s::$%s as non static", ZSTR_VAL(ce->name), ZSTR_VAL(member));
}
return ZEND_DYNAMIC_PROPERTY_OFFSET;
}
goto exit;
}
} else {
/* Try to look in the scope instead */
property_info = ZEND_WRONG_PROPERTY_INFO;
}
}
}
if (EG(fake_scope)) {
scope = EG(fake_scope);
} else {
scope = zend_get_executed_scope();
}
if (scope != ce
&& scope
&& is_derived_class(ce, scope)
&& (zv = zend_hash_find(&scope->properties_info, member)) != NULL
&& ((zend_property_info*)Z_PTR_P(zv))->flags & ZEND_ACC_PRIVATE) {
property_info = (zend_property_info*)Z_PTR_P(zv);
if (UNEXPECTED((property_info->flags & ZEND_ACC_STATIC) != 0)) {
return ZEND_DYNAMIC_PROPERTY_OFFSET;
}
} else if (UNEXPECTED(property_info == NULL)) {
exit_dynamic:
if (cache_slot) {
CACHE_POLYMORPHIC_PTR_EX(cache_slot, ce, (void*)ZEND_DYNAMIC_PROPERTY_OFFSET);
}
return ZEND_DYNAMIC_PROPERTY_OFFSET;
} else if (UNEXPECTED(property_info == ZEND_WRONG_PROPERTY_INFO)) {
/* Information was available, but we were denied access. Error out. */
if (!silent) {
zend_throw_error(NULL, "Cannot access %s property %s::$%s", zend_visibility_string(flags), ZSTR_VAL(ce->name), ZSTR_VAL(member));
}
return ZEND_WRONG_PROPERTY_OFFSET;
}
exit:
if (cache_slot) {
CACHE_POLYMORPHIC_PTR_EX(cache_slot, ce, (void*)(uintptr_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;
zend_class_entry *scope;
if (UNEXPECTED(ZSTR_VAL(member)[0] == '\0' && ZSTR_LEN(member) != 0)) {
if (!silent) {
zend_throw_error(NULL, "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_NOTICE, "Accessing static property %s::$%s as non static", ZSTR_VAL(ce->name), ZSTR_VAL(member));
}
}
goto exit;
}
} else {
/* Try to look in the scope instead */
property_info = ZEND_WRONG_PROPERTY_INFO;
}
}
}
if (EG(fake_scope)) {
scope = EG(fake_scope);
} else {
scope = zend_get_executed_scope();
}
if (scope != ce
&& scope
&& is_derived_class(ce, scope)
&& (zv = zend_hash_find(&scope->properties_info, member)) != NULL
&& ((zend_property_info*)Z_PTR_P(zv))->flags & ZEND_ACC_PRIVATE) {
property_info = (zend_property_info*)Z_PTR_P(zv);
} else if (UNEXPECTED(property_info == NULL)) {
exit_dynamic:
return NULL;
} else if (UNEXPECTED(property_info == ZEND_WRONG_PROPERTY_INFO)) {
/* Information was available, but we were denied access. Error out. */
if (!silent) {
zend_throw_error(NULL, "Cannot access %s property %s::$%s", zend_visibility_string(flags), ZSTR_VAL(ce->name), ZSTR_VAL(member));
}
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 (ZSTR_VAL(prop_info_name)[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(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;
}
}
return zend_verify_property_access(property_info, zobj->ce) ? 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(GC_FLAGS(zobj) & IS_OBJ_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) ||
/* hash values are always pred-calculated here */
(EXPECTED(ZSTR_H(str) == ZSTR_H(member)) &&
EXPECTED(zend_string_equal_content(str, member)))) {
return &zv->u2.property_guard;
} else if (EXPECTED(zv->u2.property_guard == 0)) {
zend_string_release(Z_STR_P(zv));
ZVAL_STR_COPY(zv, member);
return &zv->u2.property_guard;
} 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)&zv->u2.property_guard) | 1));
zend_string_release(Z_STR_P(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);
GC_FLAGS(zobj) |= IS_OBJ_HAS_GUARDS;
ZVAL_STR_COPY(zv, member);
zv->u2.property_guard = 0;
return &zv->u2.property_guard;
}
/* 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);
}
/* }}} */
zval *zend_std_read_property(zval *object, zval *member, int type, void **cache_slot, zval *rv) /* {{{ */
{
zend_object *zobj;
zval tmp_member, tmp_object;
zval *retval;
uintptr_t property_offset;
uint32_t *guard = NULL;
zobj = Z_OBJ_P(object);
ZVAL_UNDEF(&tmp_member);
if (UNEXPECTED(Z_TYPE_P(member) != IS_STRING)) {
ZVAL_STR(&tmp_member, zval_get_string_func(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(IS_VALID_PROPERTY_OFFSET(property_offset))) {
retval = OBJ_PROP(zobj, property_offset);
if (EXPECTED(Z_TYPE_P(retval) != IS_UNDEF)) {
goto exit;
}
} 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 == Z_STR_P(member)) ||
(EXPECTED(p->h == ZSTR_H(Z_STR_P(member))) &&
EXPECTED(p->key != NULL) &&
EXPECTED(zend_string_equal_content(p->key, Z_STR_P(member)))))) {
retval = &p->val;
goto exit;
}
}
CACHE_PTR_EX(cache_slot + 1, (void*)ZEND_DYNAMIC_PROPERTY_OFFSET);
}
retval = zend_hash_find(zobj->properties, Z_STR_P(member));
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;
}
ZVAL_UNDEF(&tmp_object);
/* magic isset */
if ((type == BP_VAR_IS) && zobj->ce->__isset) {
zval tmp_result;
guard = zend_get_property_guard(zobj, Z_STR_P(member));
if (!((*guard) & IN_ISSET)) {
if (Z_TYPE(tmp_member) == IS_UNDEF) {
ZVAL_COPY(&tmp_member, member);
member = &tmp_member;
}
ZVAL_COPY(&tmp_object, object);
ZVAL_UNDEF(&tmp_result);
*guard |= IN_ISSET;
zend_std_call_issetter(&tmp_object, member, &tmp_result);
*guard &= ~IN_ISSET;
if (!zend_is_true(&tmp_result)) {
retval = &EG(uninitialized_zval);
zval_ptr_dtor(&tmp_object);
zval_ptr_dtor(&tmp_result);
goto exit;
}
zval_ptr_dtor(&tmp_result);
}
}
/* magic get */
if (zobj->ce->__get) {
if (guard == NULL) {
guard = zend_get_property_guard(zobj, Z_STR_P(member));
}
if (!((*guard) & IN_GET)) {
/* have getter - try with it! */
if (Z_TYPE(tmp_object) == IS_UNDEF) {
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)) {
if (UNEXPECTED(Z_TYPE_P(rv) != IS_OBJECT)) {
zend_error(E_NOTICE, "Indirect modification of overloaded property %s::$%s has no effect", ZSTR_VAL(zobj->ce->name), Z_STRVAL_P(member));
}
}
} else {
retval = &EG(uninitialized_zval);
}
zval_ptr_dtor(&tmp_object);
goto exit;
} else if (Z_STRVAL_P(member)[0] == '\0' && Z_STRLEN_P(member) != 0) {
zval_ptr_dtor(&tmp_object);
zend_throw_error(NULL, "Cannot access property started with '\\0'");
retval = &EG(uninitialized_zval);
goto exit;
}
}
zval_ptr_dtor(&tmp_object);
if ((type != BP_VAR_IS)) {
zend_error(E_NOTICE,"Undefined property: %s::$%s", ZSTR_VAL(zobj->ce->name), Z_STRVAL_P(member));
}
retval = &EG(uninitialized_zval);
exit:
if (UNEXPECTED(Z_REFCOUNTED(tmp_member))) {
zval_ptr_dtor(&tmp_member);
}
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;
uintptr_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_func(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(IS_VALID_PROPERTY_OFFSET(property_offset))) {
variable_ptr = OBJ_PROP(zobj, property_offset);
if (Z_TYPE_P(variable_ptr) != IS_UNDEF) {
goto found;
}
} 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, Z_STR_P(member))) != NULL) {
found:
zend_assign_to_variable(variable_ptr, value, IS_CV);
goto exit;
}
}
} else if (UNEXPECTED(EG(exception))) {
goto exit;
}
/* magic set */
if (zobj->ce->__set) {
uint32_t *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 */
zend_std_call_setter(&tmp_object, member, value);
(*guard) &= ~IN_SET;
zval_ptr_dtor(&tmp_object);
} else if (EXPECTED(!IS_WRONG_PROPERTY_OFFSET(property_offset))) {
goto write_std_property;
} else {
if (Z_STRVAL_P(member)[0] == '\0' && Z_STRLEN_P(member) != 0) {
zend_throw_error(NULL, "Cannot access property started with '\\0'");
goto exit;
}
}
} else if (EXPECTED(!IS_WRONG_PROPERTY_OFFSET(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_COPY(&tmp, Z_REFVAL_P(value));
value = &tmp;
} else {
Z_ADDREF_P(value);
}
}
if (EXPECTED(IS_VALID_PROPERTY_OFFSET(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_REFCOUNTED(tmp_member))) {
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_offset, tmp_object;
if (EXPECTED(instanceof_function_ex(ce, zend_ce_arrayaccess, 1) != 0)) {
if (offset == NULL) {
/* [] construct */
ZVAL_NULL(&tmp_offset);
} else {
ZVAL_DEREF(offset);
ZVAL_COPY(&tmp_offset, offset);
}
ZVAL_COPY(&tmp_object, object);
if (type == BP_VAR_IS) {
zend_call_method_with_1_params(&tmp_object, ce, NULL, "offsetexists", rv, &tmp_offset);
if (UNEXPECTED(Z_ISUNDEF_P(rv))) {
zval_ptr_dtor(&tmp_object);
zval_ptr_dtor(&tmp_offset);
return NULL;
}
if (!i_zend_is_true(rv)) {
zval_ptr_dtor(&tmp_object);
zval_ptr_dtor(&tmp_offset);
zval_ptr_dtor(rv);
return &EG(uninitialized_zval);
}
zval_ptr_dtor(rv);
}
zend_call_method_with_1_params(&tmp_object, ce, NULL, "offsetget", rv, &tmp_offset);
zval_ptr_dtor(&tmp_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_throw_error(NULL, "Cannot use object of type %s as array", ZSTR_VAL(ce->name));
return NULL;
}
}
/* }}} */
static void zend_std_write_dimension(zval *object, zval *offset, zval *value) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
zval tmp_offset, tmp_object;
if (EXPECTED(instanceof_function_ex(ce, zend_ce_arrayaccess, 1) != 0)) {
if (!offset) {
ZVAL_NULL(&tmp_offset);
} else {
ZVAL_DEREF(offset);
ZVAL_COPY(&tmp_offset, offset);
}
ZVAL_COPY(&tmp_object, object);
zend_call_method_with_2_params(&tmp_object, ce, NULL, "offsetset", NULL, &tmp_offset, value);
zval_ptr_dtor(&tmp_object);
zval_ptr_dtor(&tmp_offset);
} else {
zend_throw_error(NULL, "Cannot use object of type %s as array", ZSTR_VAL(ce->name));
}
}
/* }}} */
static int zend_std_has_dimension(zval *object, zval *offset, int check_empty) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
zval retval, tmp_offset, tmp_object;
int result;
if (EXPECTED(instanceof_function_ex(ce, zend_ce_arrayaccess, 1) != 0)) {
ZVAL_DEREF(offset);
ZVAL_COPY(&tmp_offset, offset);
ZVAL_COPY(&tmp_object, object);
zend_call_method_with_1_params(&tmp_object, ce, NULL, "offsetexists", &retval, &tmp_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(&tmp_object, ce, NULL, "offsetget", &retval, &tmp_offset);
if (EXPECTED(Z_TYPE(retval) != IS_UNDEF)) {
result = i_zend_is_true(&retval);
zval_ptr_dtor(&retval);
}
}
} else {
result = 0;
}
zval_ptr_dtor(&tmp_object);
zval_ptr_dtor(&tmp_offset);
} else {
zend_throw_error(NULL, "Cannot use object of type %s as array", ZSTR_VAL(ce->name));
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, *tmp_name;
zval *retval = NULL;
uintptr_t property_offset;
zobj = Z_OBJ_P(object);
name = zval_get_tmp_string(member, &tmp_name);
#if DEBUG_OBJECT_HANDLERS
fprintf(stderr, "Ptr object #%d property: %s\n", Z_OBJ_HANDLE_P(object), ZSTR_VAL(name));
#endif
property_offset = zend_get_property_offset(zobj->ce, name, (zobj->ce->__get != NULL), cache_slot);
if (EXPECTED(IS_VALID_PROPERTY_OFFSET(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::$%s", ZSTR_VAL(zobj->ce->name), ZSTR_VAL(name));
}
} else {
/* we do have getter - fail and let it try again with usual get/set */
retval = NULL;
}
}
} else if (EXPECTED(IS_DYNAMIC_PROPERTY_OFFSET(property_offset))) {
if (EXPECTED(zobj->properties)) {
if (UNEXPECTED(GC_REFCOUNT(zobj->properties) > 1)) {
if (EXPECTED(!(GC_FLAGS(zobj->properties) & IS_ARRAY_IMMUTABLE))) {
GC_DELREF(zobj->properties);
}
zobj->properties = zend_array_dup(zobj->properties);
}
if (EXPECTED((retval = zend_hash_find(zobj->properties, name)) != NULL)) {
zend_tmp_string_release(tmp_name);
return retval;
}
}
if (EXPECTED(!zobj->ce->__get) ||
UNEXPECTED((*zend_get_property_guard(zobj, name)) & IN_GET)) {
if (UNEXPECTED(!zobj->properties)) {
rebuild_object_properties(zobj);
}
retval = zend_hash_update(zobj->properties, name, &EG(uninitialized_zval));
/* Notice is thrown after creation of the property, to avoid EG(std_property_info)
* being overwritten in an error handler. */
if (UNEXPECTED(type == BP_VAR_RW || type == BP_VAR_R)) {
zend_error(E_NOTICE, "Undefined property: %s::$%s", ZSTR_VAL(zobj->ce->name), ZSTR_VAL(name));
}
}
}
zend_tmp_string_release(tmp_name);
return retval;
}
/* }}} */
static void zend_std_unset_property(zval *object, zval *member, void **cache_slot) /* {{{ */
{
zend_object *zobj;
zval tmp_member;
uintptr_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_func(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(IS_VALID_PROPERTY_OFFSET(property_offset))) {
zval *slot = OBJ_PROP(zobj, property_offset);
if (Z_TYPE_P(slot) != IS_UNDEF) {
zval_ptr_dtor(slot);
ZVAL_UNDEF(slot);
if (zobj->properties) {
zobj->properties->u.v.flags |= HASH_FLAG_HAS_EMPTY_IND;
}
goto exit;
}
} else if (EXPECTED(IS_DYNAMIC_PROPERTY_OFFSET(property_offset))
&& 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 (EXPECTED(zend_hash_del(zobj->properties, Z_STR_P(member)) != FAILURE)) {
goto exit;
}
} else if (UNEXPECTED(EG(exception))) {
goto exit;
}
/* magic unset */
if (zobj->ce->__unset) {
uint32_t *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' && Z_STRLEN_P(member) != 0) {
zend_throw_error(NULL, "Cannot access property started with '\\0'");
goto exit;
}
}
}
exit:
if (UNEXPECTED(Z_REFCOUNTED(tmp_member))) {
zval_ptr_dtor(&tmp_member);
}
}
/* }}} */
static void zend_std_unset_dimension(zval *object, zval *offset) /* {{{ */
{
zend_class_entry *ce = Z_OBJCE_P(object);
zval tmp_offset, tmp_object;
if (instanceof_function_ex(ce, zend_ce_arrayaccess, 1)) {
ZVAL_DEREF(offset);
ZVAL_COPY(&tmp_offset, offset);
ZVAL_COPY(&tmp_object, object);
zend_call_method_with_1_params(&tmp_object, ce, NULL, "offsetunset", NULL, &tmp_offset);
zval_ptr_dtor(&tmp_object);
zval_ptr_dtor(&tmp_offset);
} else {
zend_throw_error(NULL, "Cannot use object of type %s as array", ZSTR_VAL(ce->name));
}
}
/* }}} */
/* 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;
zend_class_entry *scope;
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.
*/
scope = zend_get_executed_scope();
if (fbc->common.scope == ce && scope == ce) {
/* rule #1 checks out ok, allow the function call */
return fbc;
}
/* Check rule #2 */
ce = ce->parent;
while (ce) {
if (ce == 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 == 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;
}
return 0;
}
/* }}} */
ZEND_API zend_function *zend_get_call_trampoline_func(zend_class_entry *ce, zend_string *method_name, int is_static) /* {{{ */
{
size_t mname_len;
zend_op_array *func;
zend_function *fbc = is_static ? ce->__callstatic : ce->__call;
ZEND_ASSERT(fbc);
if (EXPECTED(EG(trampoline).common.function_name == NULL)) {
func = &EG(trampoline).op_array;
} else {
func = ecalloc(1, sizeof(zend_op_array));
}
func->type = ZEND_USER_FUNCTION;
func->arg_flags[0] = 0;
func->arg_flags[1] = 0;
func->arg_flags[2] = 0;
func->fn_flags = ZEND_ACC_CALL_VIA_TRAMPOLINE | ZEND_ACC_PUBLIC;
if (is_static) {
func->fn_flags |= ZEND_ACC_STATIC;
}
func->opcodes = &EG(call_trampoline_op);
func->prototype = fbc;
func->scope = fbc->common.scope;
/* reserve space for arguments, local and temorary variables */
func->T = (fbc->type == ZEND_USER_FUNCTION)? MAX(fbc->op_array.last_var + fbc->op_array.T, 2) : 2;
func->filename = (fbc->type == ZEND_USER_FUNCTION)? fbc->op_array.filename : ZSTR_EMPTY_ALLOC();
func->line_start = (fbc->type == ZEND_USER_FUNCTION)? fbc->op_array.line_start : 0;
func->line_end = (fbc->type == ZEND_USER_FUNCTION)? fbc->op_array.line_end : 0;
//??? keep compatibility for "\0" characters
//??? see: Zend/tests/bug46238.phpt
if (UNEXPECTED((mname_len = strlen(ZSTR_VAL(method_name))) != ZSTR_LEN(method_name))) {
func->function_name = zend_string_init(ZSTR_VAL(method_name), mname_len, 0);
} else {
func->function_name = zend_string_copy(method_name);
}
return (zend_function*)func;
}
/* }}} */
static zend_always_inline zend_function *zend_get_user_call_function(zend_class_entry *ce, zend_string *method_name) /* {{{ */
{
return zend_get_call_trampoline_func(ce, method_name, 0);
}
/* }}} */
static union _zend_function *zend_std_get_method(zend_object **obj_ptr, zend_string *method_name, const zval *key) /* {{{ */
{
zend_object *zobj = *obj_ptr;
zval *func;
zend_function *fbc;
zend_string *lc_method_name;
zend_class_entry *scope = NULL;
ALLOCA_FLAG(use_heap);
if (EXPECTED(key != NULL)) {
lc_method_name = Z_STR_P(key);
#ifdef ZEND_ALLOCA_MAX_SIZE
use_heap = 0;
#endif
} else {
ZSTR_ALLOCA_ALLOC(lc_method_name, ZSTR_LEN(method_name), use_heap);
zend_str_tolower_copy(ZSTR_VAL(lc_method_name), ZSTR_VAL(method_name), ZSTR_LEN(method_name));
}
if (UNEXPECTED((func = zend_hash_find(&zobj->ce->function_table, lc_method_name)) == NULL)) {
if (UNEXPECTED(!key)) {
ZSTR_ALLOCA_FREE(lc_method_name, use_heap);
}
if (zobj->ce->__call) {
return zend_get_user_call_function(zobj->ce, method_name);
} else {
return NULL;
}
}
fbc = Z_FUNC_P(func);
/* Check access level */
if (fbc->op_array.fn_flags & ZEND_ACC_PRIVATE) {
zend_function *updated_fbc;
/* Ensure that if we're calling a private function, we're allowed to do so.
* If we're not and __call() handler exists, invoke it, otherwise error out.
*/
updated_fbc = zend_check_private_int(fbc, zobj->ce, lc_method_name);
if (EXPECTED(updated_fbc != NULL)) {
fbc = updated_fbc;
} else {
if (zobj->ce->__call) {
fbc = zend_get_user_call_function(zobj->ce, method_name);
} else {
scope = zend_get_executed_scope();
zend_throw_error(NULL, "Call to %s method %s::%s() from context '%s'", zend_visibility_string(fbc->common.fn_flags), ZEND_FN_SCOPE_NAME(fbc), ZSTR_VAL(method_name), scope ? ZSTR_VAL(scope->name) : "");
fbc = NULL;
}
}
} else {
/* Ensure that we haven't overridden a private function and end up calling
* the overriding public function...
*/
if (fbc->op_array.fn_flags & (ZEND_ACC_CHANGED|ZEND_ACC_PROTECTED)) {
scope = zend_get_executed_scope();
}
if (fbc->op_array.fn_flags & ZEND_ACC_CHANGED) {
if (scope && is_derived_class(fbc->common.scope, scope)) {
if ((func = zend_hash_find(&scope->function_table, lc_method_name)) != NULL) {
zend_function *priv_fbc = Z_FUNC_P(func);
if (priv_fbc->common.fn_flags & ZEND_ACC_PRIVATE
&& priv_fbc->common.scope == scope) {
fbc = priv_fbc;
}
}
}
}
if (fbc->common.fn_flags & ZEND_ACC_PROTECTED) {
/* Ensure that if we're calling a protected function, we're allowed to do so.
* If we're not and __call() handler exists, invoke it, otherwise error out.
*/
if (UNEXPECTED(!zend_check_protected(zend_get_function_root_class(fbc), scope))) {
if (zobj->ce->__call) {
fbc = zend_get_user_call_function(zobj->ce, method_name);
} else {
zend_throw_error(NULL, "Call to %s method %s::%s() from context '%s'", zend_visibility_string(fbc->common.fn_flags), ZEND_FN_SCOPE_NAME(fbc), ZSTR_VAL(method_name), scope ? ZSTR_VAL(scope->name) : "");
fbc = NULL;
}
}
}
}
if (UNEXPECTED(!key)) {
ZSTR_ALLOCA_FREE(lc_method_name, use_heap);
}
return fbc;
}
/* }}} */
static zend_always_inline zend_function *zend_get_user_callstatic_function(zend_class_entry *ce, zend_string *method_name) /* {{{ */
{
return zend_get_call_trampoline_func(ce, method_name, 1);
}
/* }}} */
ZEND_API zend_function *zend_std_get_static_method(zend_class_entry *ce, zend_string *function_name, const zval *key) /* {{{ */
{
zend_function *fbc = NULL;
zend_string *lc_function_name;
zend_object *object;
zend_class_entry *scope;
if (EXPECTED(key != NULL)) {
lc_function_name = Z_STR_P(key);
} else {
lc_function_name = zend_string_tolower(function_name);
}
do {
zval *func = zend_hash_find(&ce->function_table, lc_function_name);
if (EXPECTED(func != NULL)) {
fbc = Z_FUNC_P(func);
} else if (ce->constructor
&& ZSTR_LEN(lc_function_name) == ZSTR_LEN(ce->name)
&& zend_binary_strncasecmp(ZSTR_VAL(lc_function_name), ZSTR_LEN(lc_function_name), ZSTR_VAL(ce->name), ZSTR_LEN(lc_function_name), ZSTR_LEN(lc_function_name)) == 0
/* Only change the method to the constructor if the constructor isn't called __construct
* we check for __ so we can be binary safe for lowering, we should use ZEND_CONSTRUCTOR_FUNC_NAME
*/
&& (ZSTR_VAL(ce->constructor->common.function_name)[0] != '_'
|| ZSTR_VAL(ce->constructor->common.function_name)[1] != '_')) {
fbc = ce->constructor;
} else {
if (UNEXPECTED(!key)) {
zend_string_release(lc_function_name);
}
if (ce->__call &&
(object = zend_get_this_object(EG(current_execute_data))) != NULL &&
instanceof_function(object->ce, ce)) {
/* Call the top-level defined __call().
* see: tests/classes/__call_004.phpt */
zend_class_entry *call_ce = object->ce;
while (!call_ce->__call) {
call_ce = call_ce->parent;
}
return zend_get_user_call_function(call_ce, function_name);
} else if (ce->__callstatic) {
return zend_get_user_callstatic_function(ce, function_name);
} else {
return NULL;
}
}
} while (0);
#if MBO_0
/* right now this function is used for non static method lookup too */
/* Is the function static */
if (UNEXPECTED(!(fbc->common.fn_flags & ZEND_ACC_STATIC))) {
zend_error_noreturn(E_ERROR, "Cannot call non static method %s::%s() without object", ZEND_FN_SCOPE_NAME(fbc), ZSTR_VAL(fbc->common.function_name));
}
#endif
if (fbc->op_array.fn_flags & ZEND_ACC_PUBLIC) {
/* No further checks necessary, most common case */
} else if (fbc->op_array.fn_flags & ZEND_ACC_PRIVATE) {
zend_function *updated_fbc;
/* Ensure that if we're calling a private function, we're allowed to do so.
*/
scope = zend_get_executed_scope();
updated_fbc = zend_check_private_int(fbc, scope, lc_function_name);
if (EXPECTED(updated_fbc != NULL)) {
fbc = updated_fbc;
} else {
if (ce->__callstatic) {
fbc = zend_get_user_callstatic_function(ce, function_name);
} else {
zend_throw_error(NULL, "Call to %s method %s::%s() from context '%s'", zend_visibility_string(fbc->common.fn_flags), ZEND_FN_SCOPE_NAME(fbc), ZSTR_VAL(function_name), scope ? ZSTR_VAL(scope->name) : "");
fbc = NULL;
}
}
} else if ((fbc->common.fn_flags & ZEND_ACC_PROTECTED)) {
/* Ensure that if we're calling a protected function, we're allowed to do so.
*/
scope = zend_get_executed_scope();
if (UNEXPECTED(!zend_check_protected(zend_get_function_root_class(fbc), scope))) {
if (ce->__callstatic) {
fbc = zend_get_user_callstatic_function(ce, function_name);
} else {
zend_throw_error(NULL, "Call to %s method %s::%s() from context '%s'", zend_visibility_string(fbc->common.fn_flags), ZEND_FN_SCOPE_NAME(fbc), ZSTR_VAL(function_name), scope ? ZSTR_VAL(scope->name) : "");
fbc = NULL;
}
}
}
if (UNEXPECTED(!key)) {
zend_string_release(lc_function_name);
}
return fbc;
}
/* }}} */
ZEND_API zval *zend_std_get_static_property(zend_class_entry *ce, zend_string *property_name, zend_bool silent) /* {{{ */
{
zend_property_info *property_info = zend_hash_find_ptr(&ce->properties_info, property_name);
zval *ret;
if (UNEXPECTED(property_info == NULL)) {
goto undeclared_property;
}
if (UNEXPECTED(!zend_verify_property_access(property_info, ce))) {
if (!silent) {
zend_throw_error(NULL, "Cannot access %s property %s::$%s", zend_visibility_string(property_info->flags), ZSTR_VAL(ce->name), ZSTR_VAL(property_name));
}
return NULL;
}
if (UNEXPECTED((property_info->flags & ZEND_ACC_STATIC) == 0)) {
goto undeclared_property;
}
if (UNEXPECTED(!(ce->ce_flags & ZEND_ACC_CONSTANTS_UPDATED))) {
if (UNEXPECTED(zend_update_class_constants(ce)) != SUCCESS) {
return NULL;
}
}
ret = CE_STATIC_MEMBERS(ce) + property_info->offset;
/* check if static properties were destoyed */
if (UNEXPECTED(CE_STATIC_MEMBERS(ce) == NULL)) {
undeclared_property:
if (!silent) {
zend_throw_error(NULL, "Access to undeclared static property: %s::$%s", ZSTR_VAL(ce->name), ZSTR_VAL(property_name));
}
ret = NULL;
}
return ret;
}
/* }}} */
ZEND_API ZEND_COLD zend_bool zend_std_unset_static_property(zend_class_entry *ce, zend_string *property_name) /* {{{ */
{
zend_throw_error(NULL, "Attempt to unset static property %s::$%s", ZSTR_VAL(ce->name), ZSTR_VAL(property_name));
return 0;
}
/* }}} */
ZEND_API union _zend_function *zend_std_get_constructor(zend_object *zobj) /* {{{ */
{
zend_function *constructor = zobj->ce->constructor;
zend_class_entry *scope;
if (constructor) {
if (constructor->op_array.fn_flags & ZEND_ACC_PUBLIC) {
/* No further checks necessary */
} else if (constructor->op_array.fn_flags & ZEND_ACC_PRIVATE) {
/* Ensure that if we're calling a private function, we're allowed to do so.
*/
if (EG(fake_scope)) {
scope = EG(fake_scope);
} else {
scope = zend_get_executed_scope();
}
if (UNEXPECTED(constructor->common.scope != scope)) {
if (scope) {
zend_throw_error(NULL, "Call to private %s::%s() from context '%s'", ZSTR_VAL(constructor->common.scope->name), ZSTR_VAL(constructor->common.function_name), ZSTR_VAL(scope->name));
constructor = NULL;
} else {
zend_throw_error(NULL, "Call to private %s::%s() from invalid context", ZSTR_VAL(constructor->common.scope->name), ZSTR_VAL(constructor->common.function_name));
constructor = NULL;
}
}
} else if ((constructor->common.fn_flags & ZEND_ACC_PROTECTED)) {
/* Ensure that if we're calling a protected function, we're allowed to do so.
* Constructors only have prototype if they are defined by an interface but
* it is the compilers responsibility to take care of the prototype.
*/
if (EG(fake_scope)) {
scope = EG(fake_scope);
} else {
scope = zend_get_executed_scope();
}
if (UNEXPECTED(!zend_check_protected(zend_get_function_root_class(constructor), scope))) {
if (scope) {
zend_throw_error(NULL, "Call to protected %s::%s() from context '%s'", ZSTR_VAL(constructor->common.scope->name), ZSTR_VAL(constructor->common.function_name), ZSTR_VAL(scope->name));
constructor = NULL;
} else {
zend_throw_error(NULL, "Call to protected %s::%s() from invalid context", ZSTR_VAL(constructor->common.scope->name), ZSTR_VAL(constructor->common.function_name));
constructor = NULL;
}
}
}
}
return constructor;
}
/* }}} */
static int zend_std_compare_objects(zval *o1, zval *o2) /* {{{ */
{
zend_object *zobj1, *zobj2;
zobj1 = Z_OBJ_P(o1);
zobj2 = Z_OBJ_P(o2);
if (zobj1 == zobj2) {
return 0; /* the same object */
}
if (zobj1->ce != zobj2->ce) {
return 1; /* different classes */
}
if (!zobj1->properties && !zobj2->properties) {
zval *p1, *p2, *end;
if (!zobj1->ce->default_properties_count) {
return 0;
}
p1 = zobj1->properties_table;
p2 = zobj2->properties_table;
end = p1 + zobj1->ce->default_properties_count;
/* It's enough to protect only one of the objects.
* The second one may be referenced from the first and this may cause
* false recursion detection.
*/
/* use bitwise OR to make only one conditional jump */
if (UNEXPECTED(Z_IS_RECURSIVE_P(o1))) {
zend_error_noreturn(E_ERROR, "Nesting level too deep - recursive dependency?");
}
Z_PROTECT_RECURSION_P(o1);
do {
if (Z_TYPE_P(p1) != IS_UNDEF) {
if (Z_TYPE_P(p2) != IS_UNDEF) {
zval result;
if (compare_function(&result, p1, p2)==FAILURE) {
Z_UNPROTECT_RECURSION_P(o1);
return 1;
}
if (Z_LVAL(result) != 0) {
Z_UNPROTECT_RECURSION_P(o1);
return Z_LVAL(result);
}
} else {
Z_UNPROTECT_RECURSION_P(o1);
return 1;
}
} else {
if (Z_TYPE_P(p2) != IS_UNDEF) {
Z_UNPROTECT_RECURSION_P(o1);
return 1;
}
}
p1++;
p2++;
} while (p1 != end);
Z_UNPROTECT_RECURSION_P(o1);
return 0;
} else {
if (!zobj1->properties) {
rebuild_object_properties(zobj1);
}
if (!zobj2->properties) {
rebuild_object_properties(zobj2);
}
return zend_compare_symbol_tables(zobj1->properties, zobj2->properties);
}
}
/* }}} */
static int zend_std_has_property(zval *object, zval *member, int has_set_exists, void **cache_slot) /* {{{ */
{
zend_object *zobj;
int result;
zval *value = NULL;
zval tmp_member;
uintptr_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_func(member));
member = &tmp_member;
cache_slot = NULL;
}
property_offset = zend_get_property_offset(zobj->ce, Z_STR_P(member), 1, cache_slot);
if (EXPECTED(IS_VALID_PROPERTY_OFFSET(property_offset))) {
value = OBJ_PROP(zobj, property_offset);
if (Z_TYPE_P(value) != IS_UNDEF) {
goto found;
}
} 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 == Z_STR_P(member)) ||
(EXPECTED(p->h == ZSTR_H(Z_STR_P(member))) &&
EXPECTED(p->key != NULL) &&
EXPECTED(zend_string_equal_content(p->key, Z_STR_P(member)))))) {
value = &p->val;
goto found;
}
}
CACHE_PTR_EX(cache_slot + 1, (void*)ZEND_DYNAMIC_PROPERTY_OFFSET);
}
value = zend_hash_find(zobj->properties, Z_STR_P(member));
if (value) {
if (cache_slot) {
uintptr_t idx = (char*)value - (char*)zobj->properties->arData;
CACHE_PTR_EX(cache_slot + 1, (void*)ZEND_ENCODE_DYN_PROP_OFFSET(idx));
}
found:
switch (has_set_exists) {
case 0:
ZVAL_DEREF(value);
result = (Z_TYPE_P(value) != IS_NULL);
break;
default:
result = zend_is_true(value);
break;
case 2:
result = 1;
break;
}
goto exit;
}
}
} else if (UNEXPECTED(EG(exception))) {
result = 0;
goto exit;
}
result = 0;
if ((has_set_exists != 2) && zobj->ce->__isset) {
uint32_t *guard = zend_get_property_guard(zobj, Z_STR_P(member));
if (!((*guard) & IN_ISSET)) {
zval rv;
zval tmp_object;
/* have issetter - try with it! */
if (Z_TYPE(tmp_member) == IS_UNDEF) {
ZVAL_COPY(&tmp_member, member);
member = &tmp_member;
}
ZVAL_COPY(&tmp_object, object);
(*guard) |= IN_ISSET; /* prevent circular getting */
zend_std_call_issetter(&tmp_object, member, &rv);
if (Z_TYPE(rv) != IS_UNDEF) {
result = zend_is_true(&rv);
zval_ptr_dtor(&rv);
if (has_set_exists && result) {
if (EXPECTED(!EG(exception)) && zobj->ce->__get && !((*guard) & IN_GET)) {
(*guard) |= IN_GET;
zend_std_call_getter(&tmp_object, member, &rv);
(*guard) &= ~IN_GET;
if (Z_TYPE(rv) != IS_UNDEF) {
result = i_zend_is_true(&rv);
zval_ptr_dtor(&rv);
} else {
result = 0;
}
} else {
result = 0;
}
}
}
(*guard) &= ~IN_ISSET;
zval_ptr_dtor(&tmp_object);
}
}
exit:
if (UNEXPECTED(Z_REFCOUNTED(tmp_member))) {
zval_ptr_dtor(&tmp_member);
}
return result;
}
/* }}} */
zend_string *zend_std_object_get_class_name(const zend_object *zobj) /* {{{ */
{
return zend_string_copy(zobj->ce->name);
}
/* }}} */
ZEND_API int zend_std_cast_object_tostring(zval *readobj, zval *writeobj, int type) /* {{{ */
{
zval retval;
zend_class_entry *ce;
switch (type) {
case IS_STRING:
ce = Z_OBJCE_P(readobj);
if (ce->__tostring &&
(zend_call_method_with_0_params(readobj, ce, &ce->__tostring, "__tostring", &retval) || EG(exception))) {
if (UNEXPECTED(EG(exception) != NULL)) {
zval *msg, ex, rv;
zval_ptr_dtor(&retval);
ZVAL_OBJ(&ex, EG(exception));
EG(exception) = NULL;
msg = zend_read_property(Z_OBJCE(ex), &ex, "message", sizeof("message") - 1, 1, &rv);
if (UNEXPECTED(Z_TYPE_P(msg) != IS_STRING)) {
ZVAL_EMPTY_STRING(&rv);
msg = &rv;
}
zend_error_noreturn(E_ERROR,
"Method %s::__toString() must not throw an exception, caught %s: %s",
ZSTR_VAL(ce->name), ZSTR_VAL(Z_OBJCE(ex)->name), Z_STRVAL_P(msg));
return FAILURE;
}
if (EXPECTED(Z_TYPE(retval) == IS_STRING)) {
ZVAL_COPY_VALUE(writeobj, &retval);
return SUCCESS;
} else {
zval_ptr_dtor(&retval);
ZVAL_EMPTY_STRING(writeobj);
zend_error(E_RECOVERABLE_ERROR, "Method %s::__toString() must return a string value", ZSTR_VAL(ce->name));
return SUCCESS;
}
}
return FAILURE;
case _IS_BOOL:
ZVAL_TRUE(writeobj);
return SUCCESS;
case IS_LONG:
ce = Z_OBJCE_P(readobj);
zend_error(E_NOTICE, "Object of class %s could not be converted to int", ZSTR_VAL(ce->name));
ZVAL_LONG(writeobj, 1);
return SUCCESS;
case IS_DOUBLE:
ce = Z_OBJCE_P(readobj);
zend_error(E_NOTICE, "Object of class %s could not be converted to float", ZSTR_VAL(ce->name));
ZVAL_DOUBLE(writeobj, 1);
return SUCCESS;
case _IS_NUMBER:
ce = Z_OBJCE_P(readobj);
zend_error(E_NOTICE, "Object of class %s could not be converted to number", ZSTR_VAL(ce->name));
ZVAL_LONG(writeobj, 1);
return SUCCESS;
default:
ZVAL_NULL(writeobj);
break;
}
return FAILURE;
}
/* }}} */
int zend_std_get_closure(zval *obj, zend_class_entry **ce_ptr, zend_function **fptr_ptr, zend_object **obj_ptr) /* {{{ */
{
zval *func;
zend_class_entry *ce = Z_OBJCE_P(obj);
if ((func = zend_hash_find_ex(&ce->function_table, ZSTR_KNOWN(ZEND_STR_MAGIC_INVOKE), 1)) == NULL) {
return FAILURE;
}
*fptr_ptr = Z_FUNC_P(func);
*ce_ptr = ce;
if ((*fptr_ptr)->common.fn_flags & ZEND_ACC_STATIC) {
if (obj_ptr) {
*obj_ptr = NULL;
}
} else {
if (obj_ptr) {
*obj_ptr = Z_OBJ_P(obj);
}
}
return SUCCESS;
}
/* }}} */
ZEND_API zend_object_handlers std_object_handlers = {
0, /* offset */
zend_object_std_dtor, /* free_obj */
zend_objects_destroy_object, /* dtor_obj */
zend_objects_clone_obj, /* clone_obj */
zend_std_read_property, /* read_property */
zend_std_write_property, /* write_property */
zend_std_read_dimension, /* read_dimension */
zend_std_write_dimension, /* write_dimension */
zend_std_get_property_ptr_ptr, /* get_property_ptr_ptr */
NULL, /* get */
NULL, /* set */
zend_std_has_property, /* has_property */
zend_std_unset_property, /* unset_property */
zend_std_has_dimension, /* has_dimension */
zend_std_unset_dimension, /* unset_dimension */
zend_std_get_properties, /* get_properties */
zend_std_get_method, /* get_method */
NULL, /* call_method */
zend_std_get_constructor, /* get_constructor */
zend_std_object_get_class_name, /* get_class_name */
zend_std_compare_objects, /* compare_objects */
zend_std_cast_object_tostring, /* cast_object */
NULL, /* count_elements */
zend_std_get_debug_info, /* get_debug_info */
zend_std_get_closure, /* get_closure */
zend_std_get_gc, /* get_gc */
NULL, /* do_operation */
NULL, /* compare */
};
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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