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php-src/Zend/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 {
zend_bad_array_access(ce);
return 0;
}
return result;
}
/* }}} */
ZEND_API zval *zend_std_get_property_ptr_ptr(zend_object *zobj, zend_string *name, int type, void **cache_slot) /* {{{ */
{
zval *retval = NULL;
uintptr_t property_offset;
zend_property_info *prop_info = NULL;
#if DEBUG_OBJECT_HANDLERS
fprintf(stderr, "Ptr object #%d property: %s\n", zobj->handle, ZSTR_VAL(name));
#endif
property_offset = zend_get_property_offset(zobj->ce, name, (zobj->ce->__get != NULL), cache_slot, &prop_info);
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) ||
UNEXPECTED(prop_info && Z_PROP_FLAG_P(retval) == IS_PROP_UNINIT)) {
if (UNEXPECTED(type == BP_VAR_RW || type == BP_VAR_R)) {
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));
retval = &EG(error_zval);
} else {
ZVAL_NULL(retval);
zend_error(E_WARNING, "Undefined property: %s::$%s", ZSTR_VAL(zobj->ce->name), ZSTR_VAL(name));
}
} else if (prop_info && UNEXPECTED(prop_info->flags & ZEND_ACC_READONLY)) {
/* Readonly property, delegate to read_property + write_property. */
retval = NULL;
} else if (!prop_info || !ZEND_TYPE_IS_SET(prop_info->type)) {
ZVAL_NULL(retval);
}
} else {
/* we do have getter - fail and let it try again with usual get/set */
retval = NULL;
}
} else if (prop_info && UNEXPECTED(prop_info->flags & ZEND_ACC_READONLY)) {
/* Readonly property, delegate to read_property + write_property. */
retval = NULL;
}
} else if (EXPECTED(IS_DYNAMIC_PROPERTY_OFFSET(property_offset))) {
if (EXPECTED(zobj->properties)) {
if (UNEXPECTED(GC_REFCOUNT(zobj->properties) > 1)) {
if (EXPECTED(!(GC_FLAGS(zobj->properties) & IS_ARRAY_IMMUTABLE))) {
GC_DELREF(zobj->properties);
}
zobj->properties = zend_array_dup(zobj->properties);
}
if (EXPECTED((retval = zend_hash_find(zobj->properties, name)) != NULL)) {
return retval;
}
}
if (EXPECTED(!zobj->ce->__get) ||
UNEXPECTED((*zend_get_property_guard(zobj, name)) & IN_GET)) {
if (UNEXPECTED(zobj->ce->ce_flags & ZEND_ACC_NO_DYNAMIC_PROPERTIES)) {
zend_forbidden_dynamic_property(zobj->ce, name);
return &EG(error_zval);
}
if (UNEXPECTED(!zobj->properties)) {
rebuild_object_properties(zobj);
}
retval = zend_hash_update(zobj->properties, name, &EG(uninitialized_zval));
/* Notice is thrown after creation of the property, to avoid EG(std_property_info)
* being overwritten in an error handler. */
if (UNEXPECTED(type == BP_VAR_RW || type == BP_VAR_R)) {
zend_error(E_WARNING, "Undefined property: %s::$%s", ZSTR_VAL(zobj->ce->name), ZSTR_VAL(name));
}
}
} else if (zobj->ce->__get == NULL) {
retval = &EG(error_zval);
}
return retval;
}
/* }}} */
ZEND_API void zend_std_unset_property(zend_object *zobj, zend_string *name, void **cache_slot) /* {{{ */
{
uintptr_t property_offset;
zend_property_info *prop_info = NULL;
property_offset = zend_get_property_offset(zobj->ce, name, (zobj->ce->__unset != NULL), cache_slot, &prop_info);
if (EXPECTED(IS_VALID_PROPERTY_OFFSET(property_offset))) {
zval *slot = OBJ_PROP(zobj, property_offset);
if (Z_TYPE_P(slot) != IS_UNDEF) {
if (UNEXPECTED(prop_info && (prop_info->flags & ZEND_ACC_READONLY))) {
zend_readonly_property_unset_error(prop_info->ce, name);
return;
}
if (UNEXPECTED(Z_ISREF_P(slot)) &&
(ZEND_DEBUG || ZEND_REF_HAS_TYPE_SOURCES(Z_REF_P(slot)))) {
if (prop_info) {
ZEND_REF_DEL_TYPE_SOURCE(Z_REF_P(slot), prop_info);
}
}
zval tmp;
ZVAL_COPY_VALUE(&tmp, slot);
ZVAL_UNDEF(slot);
zval_ptr_dtor(&tmp);
if (zobj->properties) {
HT_FLAGS(zobj->properties) |= HASH_FLAG_HAS_EMPTY_IND;
}
return;
}
if (UNEXPECTED(Z_PROP_FLAG_P(slot) == IS_PROP_UNINIT)) {
if (UNEXPECTED(prop_info && (prop_info->flags & ZEND_ACC_READONLY)
&& !verify_readonly_initialization_access(prop_info, zobj->ce, name, "unset"))) {
return;
}
/* Reset the IS_PROP_UNINIT flag, if it exists and bypass __unset(). */
Z_PROP_FLAG_P(slot) = 0;
return;
}
} 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, name) != FAILURE)) {
return;
}
} else if (UNEXPECTED(EG(exception))) {
return;
}
/* magic unset */
if (zobj->ce->__unset) {
uint32_t *guard = zend_get_property_guard(zobj, name);
if (!((*guard) & IN_UNSET)) {
/* have unseter - try with it! */
(*guard) |= IN_UNSET; /* prevent circular unsetting */
zend_std_call_unsetter(zobj, name);
(*guard) &= ~IN_UNSET;
} else if (UNEXPECTED(IS_WRONG_PROPERTY_OFFSET(property_offset))) {
/* Trigger the correct error */
zend_wrong_offset(zobj->ce, name);
ZEND_ASSERT(EG(exception));
return;
} else {
/* Nothing to do: The property already does not exist. */
}
}
}
/* }}} */
ZEND_API void zend_std_unset_dimension(zend_object *object, zval *offset) /* {{{ */
{
zend_class_entry *ce = object->ce;
zval tmp_offset;
if (zend_class_implements_interface(ce, zend_ce_arrayaccess)) {
ZVAL_COPY_DEREF(&tmp_offset, offset);
GC_ADDREF(object);
zend_call_method_with_1_params(object, ce, NULL, "offsetunset", NULL, &tmp_offset);
OBJ_RELEASE(object);
zval_ptr_dtor(&tmp_offset);
} else {
zend_bad_array_access(ce);
}
}
/* }}} */
static zend_never_inline zend_function *zend_get_parent_private_method(zend_class_entry *scope, zend_class_entry *ce, zend_string *function_name) /* {{{ */
{
zval *func;
zend_function *fbc;
if (scope != ce && scope && is_derived_class(ce, scope)) {
func = zend_hash_find(&scope->function_table, function_name);
if (func != NULL) {
fbc = Z_FUNC_P(func);
if ((fbc->common.fn_flags & ZEND_ACC_PRIVATE)
&& fbc->common.scope == scope) {
return fbc;
}
}
}
return 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;
/* We use non-NULL value to avoid useless run_time_cache allocation.
* The low bit must be zero, to not be interpreted as a MAP_PTR offset.
*/
static const void *dummy = (void*)(intptr_t)2;
static const zend_arg_info arg_info[1] = {{0}};
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 | ZEND_ACC_VARIADIC;
if (is_static) {
func->fn_flags |= ZEND_ACC_STATIC;
}
func->opcodes = &EG(call_trampoline_op);
ZEND_MAP_PTR_INIT(func->run_time_cache, (void***)&dummy);
func->scope = fbc->common.scope;
/* reserve space for arguments, local and temporary variables */
/* EG(trampoline) is reused from other places, like FFI (e.g. zend_ffi_cdata_get_closure()) where
* it is used as an internal function. It may set fields that don't belong to common, thus
* modifying zend_op_array specific data, most significantly last_var. We need to reset this
* value so that it doesn't contain garbage when the engine allocates space for the next stack
* frame. This didn't cause any issues until now due to "lucky" structure layout. */
func->last_var = 0;
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);
}
func->prototype = NULL;
func->num_args = 0;
func->required_num_args = 0;
func->arg_info = (zend_arg_info *) arg_info;
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 ZEND_COLD zend_never_inline void zend_bad_method_call(zend_function *fbc, zend_string *method_name, zend_class_entry *scope) /* {{{ */
{
zend_throw_error(NULL, "Call to %s method %s::%s() from %s%s",
zend_visibility_string(fbc->common.fn_flags), ZEND_FN_SCOPE_NAME(fbc), ZSTR_VAL(method_name),
scope ? "scope " : "global scope",
scope ? ZSTR_VAL(scope->name) : ""
);
}
/* }}} */
static ZEND_COLD zend_never_inline void zend_abstract_method_call(zend_function *fbc) /* {{{ */
{
zend_throw_error(NULL, "Cannot call abstract method %s::%s()",
ZSTR_VAL(fbc->common.scope->name), ZSTR_VAL(fbc->common.function_name));
}
/* }}} */
ZEND_API 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;
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_CHANGED|ZEND_ACC_PRIVATE|ZEND_ACC_PROTECTED)) {
scope = zend_get_executed_scope();
if (fbc->common.scope != scope) {
if (fbc->op_array.fn_flags & ZEND_ACC_CHANGED) {
zend_function *updated_fbc = zend_get_parent_private_method(scope, zobj->ce, lc_method_name);
if (EXPECTED(updated_fbc != NULL)) {
fbc = updated_fbc;
goto exit;
} else if (fbc->op_array.fn_flags & ZEND_ACC_PUBLIC) {
goto exit;
}
}
if (UNEXPECTED(fbc->op_array.fn_flags & ZEND_ACC_PRIVATE)
|| 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_bad_method_call(fbc, method_name, scope);
fbc = NULL;
}
}
}
}
exit:
if (fbc && UNEXPECTED(fbc->common.fn_flags & ZEND_ACC_ABSTRACT)) {
zend_abstract_method_call(fbc);
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);
}
/* }}} */
static zend_always_inline zend_function *get_static_method_fallback(
zend_class_entry *ce, zend_string *function_name)
{
zend_object *object;
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_ASSERT(object->ce->__call);
return zend_get_user_call_function(object->ce, function_name);
} else if (ce->__callstatic) {
return zend_get_user_callstatic_function(ce, function_name);
} else {
return NULL;
}
}
ZEND_API zend_function *zend_std_get_static_method(zend_class_entry *ce, zend_string *function_name, const zval *key) /* {{{ */
{
zend_string *lc_function_name;
if (EXPECTED(key != NULL)) {
lc_function_name = Z_STR_P(key);
} else {
lc_function_name = zend_string_tolower(function_name);
}
zend_function *fbc;
zval *func = zend_hash_find(&ce->function_table, lc_function_name);
if (EXPECTED(func)) {
fbc = Z_FUNC_P(func);
if (!(fbc->op_array.fn_flags & ZEND_ACC_PUBLIC)) {
zend_class_entry *scope = zend_get_executed_scope();
if (UNEXPECTED(fbc->common.scope != scope)) {
if (UNEXPECTED(fbc->op_array.fn_flags & ZEND_ACC_PRIVATE)
|| UNEXPECTED(!zend_check_protected(zend_get_function_root_class(fbc), scope))) {
zend_function *fallback_fbc = get_static_method_fallback(ce, function_name);
if (!fallback_fbc) {
zend_bad_method_call(fbc, function_name, scope);
}
fbc = fallback_fbc;
}
}
}
} else {
fbc = get_static_method_fallback(ce, function_name);
}
if (UNEXPECTED(!key)) {
zend_string_release_ex(lc_function_name, 0);
}
if (EXPECTED(fbc)) {
if (UNEXPECTED(fbc->common.fn_flags & ZEND_ACC_ABSTRACT)) {
zend_abstract_method_call(fbc);
fbc = NULL;
} else if (UNEXPECTED(fbc->common.scope->ce_flags & ZEND_ACC_TRAIT)) {
zend_error(E_DEPRECATED,
"Calling static trait method %s::%s is deprecated, "
"it should only be called on a class using the trait",
ZSTR_VAL(fbc->common.scope->name), ZSTR_VAL(fbc->common.function_name));
if (EG(exception)) {
return NULL;
}
}
}
return fbc;
}
/* }}} */
ZEND_API void zend_class_init_statics(zend_class_entry *class_type) /* {{{ */
{
int i;
zval *p;
if (class_type->default_static_members_count && !CE_STATIC_MEMBERS(class_type)) {
if (class_type->parent) {
zend_class_init_statics(class_type->parent);
}
ZEND_MAP_PTR_SET(class_type->static_members_table, emalloc(sizeof(zval) * class_type->default_static_members_count));
for (i = 0; i < class_type->default_static_members_count; i++) {
p = &class_type->default_static_members_table[i];
if (Z_TYPE_P(p) == IS_INDIRECT) {
zval *q = &CE_STATIC_MEMBERS(class_type->parent)[i];
ZVAL_DEINDIRECT(q);
ZVAL_INDIRECT(&CE_STATIC_MEMBERS(class_type)[i], q);
} else {
ZVAL_COPY_OR_DUP(&CE_STATIC_MEMBERS(class_type)[i], p);
}
}
}
} /* }}} */
ZEND_API zval *zend_std_get_static_property_with_info(zend_class_entry *ce, zend_string *property_name, int type, zend_property_info **property_info_ptr) /* {{{ */
{
zval *ret;
zend_class_entry *scope;
zend_property_info *property_info = zend_hash_find_ptr(&ce->properties_info, property_name);
*property_info_ptr = property_info;
if (UNEXPECTED(property_info == NULL)) {
goto undeclared_property;
}
if (!(property_info->flags & ZEND_ACC_PUBLIC)) {
if (UNEXPECTED(EG(fake_scope))) {
scope = EG(fake_scope);
} else {
scope = zend_get_executed_scope();
}
if (property_info->ce != scope) {
if (UNEXPECTED(property_info->flags & ZEND_ACC_PRIVATE)
|| UNEXPECTED(!is_protected_compatible_scope(property_info->ce, scope))) {
if (type != BP_VAR_IS) {
zend_bad_property_access(property_info, ce, property_name);
}
return NULL;
}
}
}
if (UNEXPECTED((property_info->flags & ZEND_ACC_STATIC) == 0)) {
undeclared_property:
if (type != BP_VAR_IS) {
zend_throw_error(NULL, "Access to undeclared static property %s::$%s", ZSTR_VAL(ce->name), ZSTR_VAL(property_name));
}
return NULL;
}
if (UNEXPECTED(!(ce->ce_flags & ZEND_ACC_CONSTANTS_UPDATED))) {
if (UNEXPECTED(zend_update_class_constants(ce)) != SUCCESS) {
return NULL;
}
}
/* Ensure static properties are initialized. */
if (UNEXPECTED(CE_STATIC_MEMBERS(ce) == NULL)) {
zend_class_init_statics(ce);
}
ret = CE_STATIC_MEMBERS(ce) + property_info->offset;
ZVAL_DEINDIRECT(ret);
if (UNEXPECTED((type == BP_VAR_R || type == BP_VAR_RW)
&& Z_TYPE_P(ret) == IS_UNDEF && ZEND_TYPE_IS_SET(property_info->type))) {
zend_throw_error(NULL, "Typed static property %s::$%s must not be accessed before initialization",
ZSTR_VAL(property_info->ce->name), ZSTR_VAL(property_name));
return NULL;
}
if (UNEXPECTED(ce->ce_flags & ZEND_ACC_TRAIT)) {
zend_error(E_DEPRECATED,
"Accessing static trait property %s::$%s is deprecated, "
"it should only be accessed on a class using the trait",
ZSTR_VAL(property_info->ce->name), ZSTR_VAL(property_name));
}
return ret;
}
/* }}} */
ZEND_API zval *zend_std_get_static_property(zend_class_entry *ce, zend_string *property_name, int type) /* {{{ */
{
zend_property_info *prop_info;
return zend_std_get_static_property_with_info(ce, property_name, type, &prop_info);
}
ZEND_API ZEND_COLD bool zend_std_unset_static_property(zend_class_entry *ce, zend_string *property_name) /* {{{ */
{
zend_throw_error(NULL, "Attempt to unset static property %s::$%s", ZSTR_VAL(ce->name), ZSTR_VAL(property_name));
return 0;
}
/* }}} */
static ZEND_COLD zend_never_inline void zend_bad_constructor_call(zend_function *constructor, zend_class_entry *scope) /* {{{ */
{
if (scope) {
zend_throw_error(NULL, "Call to %s %s::%s() from scope %s",
zend_visibility_string(constructor->common.fn_flags), ZSTR_VAL(constructor->common.scope->name),
ZSTR_VAL(constructor->common.function_name), ZSTR_VAL(scope->name)
);
} else {
zend_throw_error(NULL, "Call to %s %s::%s() from global scope", zend_visibility_string(constructor->common.fn_flags), ZSTR_VAL(constructor->common.scope->name), ZSTR_VAL(constructor->common.function_name));
}
}
/* }}} */
ZEND_API zend_function *zend_std_get_constructor(zend_object *zobj) /* {{{ */
{
zend_function *constructor = zobj->ce->constructor;
zend_class_entry *scope;
if (constructor) {
if (UNEXPECTED(!(constructor->op_array.fn_flags & ZEND_ACC_PUBLIC))) {
if (UNEXPECTED(EG(fake_scope))) {
scope = EG(fake_scope);
} else {
scope = zend_get_executed_scope();
}
if (UNEXPECTED(constructor->common.scope != scope)) {
if (UNEXPECTED(constructor->op_array.fn_flags & ZEND_ACC_PRIVATE)
|| UNEXPECTED(!zend_check_protected(zend_get_function_root_class(constructor), scope))) {
zend_bad_constructor_call(constructor, scope);
constructor = NULL;
}
}
}
}
return constructor;
}
/* }}} */
ZEND_API int zend_std_compare_objects(zval *o1, zval *o2) /* {{{ */
{
zend_object *zobj1, *zobj2;
if (Z_TYPE_P(o1) != Z_TYPE_P(o2)) {
/* Object and non-object */
zval casted;
if (Z_TYPE_P(o1) == IS_OBJECT) {
ZEND_ASSERT(Z_TYPE_P(o2) != IS_OBJECT);
zend_uchar target_type = (Z_TYPE_P(o2) == IS_FALSE || Z_TYPE_P(o2) == IS_TRUE)
? _IS_BOOL : Z_TYPE_P(o2);
if (Z_OBJ_HT_P(o1)->cast_object(Z_OBJ_P(o1), &casted, target_type) == FAILURE) {
// TODO: Less crazy.
if (target_type == IS_LONG || target_type == IS_DOUBLE) {
zend_error(E_NOTICE, "Object of class %s could not be converted to %s",
ZSTR_VAL(Z_OBJCE_P(o1)->name), zend_get_type_by_const(target_type));
if (target_type == IS_LONG) {
ZVAL_LONG(&casted, 1);
} else {
ZVAL_DOUBLE(&casted, 1.0);
}
} else {
return 1;
}
}
int ret = zend_compare(&casted, o2);
zval_ptr_dtor(&casted);
return ret;
} else {
ZEND_ASSERT(Z_TYPE_P(o2) == IS_OBJECT);
zend_uchar target_type = (Z_TYPE_P(o1) == IS_FALSE || Z_TYPE_P(o1) == IS_TRUE)
? _IS_BOOL : Z_TYPE_P(o1);
if (Z_OBJ_HT_P(o2)->cast_object(Z_OBJ_P(o2), &casted, target_type) == FAILURE) {
// TODO: Less crazy.
if (target_type == IS_LONG || target_type == IS_DOUBLE) {
zend_error(E_NOTICE, "Object of class %s could not be converted to %s",
ZSTR_VAL(Z_OBJCE_P(o2)->name), zend_get_type_by_const(target_type));
if (target_type == IS_LONG) {
ZVAL_LONG(&casted, 1);
} else {
ZVAL_DOUBLE(&casted, 1.0);
}
} else {
return -1;
}
}
int ret = zend_compare(o1, &casted);
zval_ptr_dtor(&casted);
return ret;
}
return ZEND_UNCOMPARABLE;
}
zobj1 = Z_OBJ_P(o1);
zobj2 = Z_OBJ_P(o2);
if (zobj1 == zobj2) {
return 0; /* the same object */
}
if (zobj1->ce != zobj2->ce) {
return ZEND_UNCOMPARABLE; /* different classes */
}
if (!zobj1->properties && !zobj2->properties) {
zend_property_info *info;
int i;
if (!zobj1->ce->default_properties_count) {
return 0;
}
/* 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);
for (i = 0; i < zobj1->ce->default_properties_count; i++) {
zval *p1, *p2;
info = zobj1->ce->properties_info_table[i];
if (!info) {
continue;
}
p1 = OBJ_PROP(zobj1, info->offset);
p2 = OBJ_PROP(zobj2, info->offset);
if (Z_TYPE_P(p1) != IS_UNDEF) {
if (Z_TYPE_P(p2) != IS_UNDEF) {
int ret;
ret = zend_compare(p1, p2);
if (ret != 0) {
Z_UNPROTECT_RECURSION_P(o1);
return ret;
}
} else {
Z_UNPROTECT_RECURSION_P(o1);
return 1;
}
} else {
if (Z_TYPE_P(p2) != IS_UNDEF) {
Z_UNPROTECT_RECURSION_P(o1);
return 1;
}
}
}
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);
}
}
/* }}} */
ZEND_API int zend_objects_not_comparable(zval *o1, zval *o2)
{
return ZEND_UNCOMPARABLE;
}
ZEND_API int zend_std_has_property(zend_object *zobj, zend_string *name, int has_set_exists, void **cache_slot) /* {{{ */
{
int result;
zval *value = NULL;
uintptr_t property_offset;
zend_property_info *prop_info = NULL;
zend_string *tmp_name = NULL;
property_offset = zend_get_property_offset(zobj->ce, name, 1, cache_slot, &prop_info);
if (EXPECTED(IS_VALID_PROPERTY_OFFSET(property_offset))) {
value = OBJ_PROP(zobj, property_offset);
if (Z_TYPE_P(value) != IS_UNDEF) {
goto found;
}
if (UNEXPECTED(Z_PROP_FLAG_P(value) == IS_PROP_UNINIT)) {
/* Skip __isset() for uninitialized typed properties */
result = 0;
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 == name) ||
(EXPECTED(p->h == ZSTR_H(name)) &&
EXPECTED(p->key != NULL) &&
EXPECTED(zend_string_equal_content(p->key, name))))) {
value = &p->val;
goto found;
}
}
CACHE_PTR_EX(cache_slot + 1, (void*)ZEND_DYNAMIC_PROPERTY_OFFSET);
}
value = zend_hash_find(zobj->properties, name);
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:
if (has_set_exists == ZEND_PROPERTY_NOT_EMPTY) {
result = zend_is_true(value);
} else if (has_set_exists < ZEND_PROPERTY_NOT_EMPTY) {
ZEND_ASSERT(has_set_exists == ZEND_PROPERTY_ISSET);
ZVAL_DEREF(value);
result = (Z_TYPE_P(value) != IS_NULL);
} else {
ZEND_ASSERT(has_set_exists == ZEND_PROPERTY_EXISTS);
result = 1;
}
goto exit;
}
}
} else if (UNEXPECTED(EG(exception))) {
result = 0;
goto exit;
}
result = 0;
if ((has_set_exists != ZEND_PROPERTY_EXISTS) && zobj->ce->__isset) {
uint32_t *guard = zend_get_property_guard(zobj, name);
if (!((*guard) & IN_ISSET)) {
zval rv;
/* have issetter - try with it! */
if (!tmp_name && !ZSTR_IS_INTERNED(name)) {
tmp_name = zend_string_copy(name);
}
GC_ADDREF(zobj);
(*guard) |= IN_ISSET; /* prevent circular getting */
zend_std_call_issetter(zobj, name, &rv);
result = zend_is_true(&rv);
zval_ptr_dtor(&rv);
if (has_set_exists == ZEND_PROPERTY_NOT_EMPTY && result) {
if (EXPECTED(!EG(exception)) && zobj->ce->__get && !((*guard) & IN_GET)) {
(*guard) |= IN_GET;
zend_std_call_getter(zobj, name, &rv);
(*guard) &= ~IN_GET;
result = i_zend_is_true(&rv);
zval_ptr_dtor(&rv);
} else {
result = 0;
}
}
(*guard) &= ~IN_ISSET;
OBJ_RELEASE(zobj);
}
}
exit:
zend_tmp_string_release(tmp_name);
return result;
}
/* }}} */
ZEND_API zend_string *zend_std_get_class_name(const zend_object *zobj) /* {{{ */
{
return zend_string_copy(zobj->ce->name);
}
/* }}} */
ZEND_API int zend_std_cast_object_tostring(zend_object *readobj, zval *writeobj, int type) /* {{{ */
{
switch (type) {
case IS_STRING: {
zend_class_entry *ce = readobj->ce;
if (ce->__tostring) {
zval retval;
GC_ADDREF(readobj);
zend_call_known_instance_method_with_0_params(ce->__tostring, readobj, &retval);
zend_object_release(readobj);
if (EXPECTED(Z_TYPE(retval) == IS_STRING)) {
ZVAL_COPY_VALUE(writeobj, &retval);
return SUCCESS;
}
zval_ptr_dtor(&retval);
if (!EG(exception)) {
zend_throw_error(NULL, "Method %s::__toString() must return a string value", ZSTR_VAL(ce->name));
}
}
return FAILURE;
}
case _IS_BOOL:
ZVAL_TRUE(writeobj);
return SUCCESS;
default:
return FAILURE;
}
}
/* }}} */
ZEND_API int zend_std_get_closure(zend_object *obj, zend_class_entry **ce_ptr, zend_function **fptr_ptr, zend_object **obj_ptr, bool check_only) /* {{{ */
{
zend_class_entry *ce = obj->ce;
zval *func = zend_hash_find_known_hash(&ce->function_table, ZSTR_KNOWN(ZEND_STR_MAGIC_INVOKE));
if (func == 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 = obj;
}
}
return SUCCESS;
}
/* }}} */
ZEND_API HashTable *zend_std_get_properties_for(zend_object *obj, zend_prop_purpose purpose) {
HashTable *ht;
switch (purpose) {
case ZEND_PROP_PURPOSE_DEBUG:
if (obj->handlers->get_debug_info) {
int is_temp;
ht = obj->handlers->get_debug_info(obj, &is_temp);
if (ht && !is_temp) {
GC_TRY_ADDREF(ht);
}
return ht;
}
ZEND_FALLTHROUGH;
case ZEND_PROP_PURPOSE_ARRAY_CAST:
case ZEND_PROP_PURPOSE_SERIALIZE:
case ZEND_PROP_PURPOSE_VAR_EXPORT:
case ZEND_PROP_PURPOSE_JSON:
ht = obj->handlers->get_properties(obj);
if (ht) {
GC_TRY_ADDREF(ht);
}
return ht;
default:
ZEND_UNREACHABLE();
return NULL;
}
}
ZEND_API HashTable *zend_get_properties_for(zval *obj, zend_prop_purpose purpose) {
zend_object *zobj = Z_OBJ_P(obj);
if (zobj->handlers->get_properties_for) {
return zobj->handlers->get_properties_for(zobj, purpose);
}
return zend_std_get_properties_for(zobj, purpose);
}
ZEND_API const 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 */
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 */
zend_std_get_constructor, /* get_constructor */
zend_std_get_class_name, /* get_class_name */
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 */
zend_std_compare_objects, /* compare */
NULL, /* get_properties_for */
};
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