The following code poses a problem in the JIT:
```php
class A {
public $prop = 1;
}
class B extends A {
public $prop = 1 {
get => parent::$prop::get() * 2;
}
}
function test(A $a) {
var_dump($a->prop);
}
test(new B);
```
The JIT would assume A::$prop in test() could be accessed directly
through OBJ_PROP_NUM(). However, since child classes can add new hooks
to existing properties, this assumption no longer holds.
To avoid introducing more JIT checks, a hooked property that overrides a
unhooked property now results in a separate zval slot that is used
instead of the parent slot. This causes the JIT to pick the slow path
due to an IS_UNDEF value in the parent slot.
zend_class_entry.properties_info_table poses a problem in that
zend_get_property_info_for_slot() and friends will be called using the
child slot, which does not store its property info, since the parent
slot already does. In this case, zend_get_property_info_for_slot() now
provides a fallback that will iterate all property infos to find the
correct one.
This also uncovered a bug (see Zend/tests/property_hooks/dump.phpt)
where the default value of a parent property would accidentally be
inherited by the child property.
Fixes GH-17376
Closes GH-17870
Caused by GH-15492. While the parent might contain callable, it may also
contain other types. zend_is_class_subtype_of_type() may be checking a
member that is not callable itself. Fall back to the normal class
subtype check.
Discovered by a failing Laravel test in nightly.
In the process, remove the (incorrect) assumption that any abstract method that
needs to be implemented by a class that cannot itself be made abstract must be
a private method - the existing test for an enum already showed that this was
not the case.
The get-only case is obvious, there is no set operation so specifying its
visibility is senseless. The set-only case is also questionable, since there is
no operation other than set, so changing the visibility of the entire property
is preferable.
Closes GH-15698
* Mark many functions as static
Multiple functions are missing the static qualifier.
* remove unused struct sigactions
struct sigaction act, old_term, old_quit, old_int;
all unused.
* optimizer: minXOR and maxXOR are unused
* Fix prototype for trait methods
Fixes GH-14009
* Clenup do_inheritance_check_on_method()
Remove wierd checks and define the behavior by explicit set of flags
* Fix naming and indentation
---------
Co-authored-by: Ilija Tovilo <ilija.tovilo@me.com>
It's indeed unsafe to treat zend_internal_function as zend_function, because
sizeof(zend_internal_function) < sizeof(zend_function), which can lead to buffer
overflows. This might also be UB.
Either way, this would need to be addressed in the whole codebase.
Inherited methods regardless of source must share the original runtime cache. Traits were missed.
This adds ZEND_ACC_TRAIT_CLONE to internal functions as well to allow easy distinction of these.
* PHP-8.3:
Fix GH-13177: PHP 8.3.2: final private constructor not allowed when used in trait
Fix GH-12107: When running a stored procedure (that returns a result set) twice, PHP crashes
