Don't intern compiled_filename

For php-ast interning the file name is an effective memory leak,
see php-ast#134.

I don't think there's any reason to do this. At some point this

Don't intern compiled_filename

For php-ast interning the file name is an effective memory leak,
see php-ast#134.

I don't think there's any reason to do this. At some point this
was needed due to bugs in the interned string mechanism that
caused issues if the string was later interned, e.g. through a
__FILE__ reference. These issues have since been resolved.

In conjunction with the filenames_table removal in c4016ecd446ef26bb3dc77735b6e441e151ea985
this means that filenames now need to be refcounted like normal
strings. In particular the filename reference in op_arrays and CEs
are refcounted.

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Implement named parameters

From an engine perspective, named parameters mainly add three
concepts:

* The SEND_* opcodes now accept a CONST op2, which is the
argument nam

Implement named parameters

From an engine perspective, named parameters mainly add three
concepts:

* The SEND_* opcodes now accept a CONST op2, which is the
argument name. For now, it is looked up by linear scan and
runtime cached.
* This may leave UNDEF arguments on the stack. To avoid having
to deal with them in other places, a CHECK_UNDEF_ARGS opcode
is used to either replace them with defaults, or error.
* For variadic functions, EX(extra_named_params) are collected
and need to be freed based on ZEND_CALL_HAS_EXTRA_NAMED_PARAMS.

RFC: https://wiki.php.net/rfc/named_params

Closes GH-5357.

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Implement nullsafe ?-> operator

RFC: https://wiki.php.net/rfc/nullsafe_operator

Closes GH-5619.

Co-authored-by: Nikita Popov <nikita.ppv@gmail.com>

Drop useless zend_accel_script_persistable() function

Fix preloading of union typed property inherited from internal class

Tricky edge case: We inherit a property from an internal class,
in which case no property duplication takes place. We

Fix preloading of union typed property inherited from internal class

Tricky edge case: We inherit a property from an internal class,
in which case no property duplication takes place. We should not
try to persist the property info in that case. This didn't really
matter previously, but now that the property has some non-interned
owned data (the type), we need to make sure we don't try to free
that.

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Check for name vs ce in a few more places

The type lists may contain CEs, we should not assume they only
contain names.

Implement match expression

RFC: https://wiki.php.net/rfc/match_expression_v2

Closes GH-5371.

Cache __unserialize() instead of unserialize()

We should use these cache slots for the new object serialization
mechanism rather than the old one.

Change GC_COLLECTABLE flag into GC_NOT_COLLECTABLE to simplify GC_MAY_LEAK() check

Add Attributes

Co-authored-by: Martin Schröder <m.schroeder2007@gmail.com>

Set proper jit_extension for inherited methods

Add support for replaying warnings in opcache

If opcache.record_warnings is enabled, opcache will record
compilation warnings and replay them when the file is included
again. The pri

Add support for replaying warnings in opcache

If opcache.record_warnings is enabled, opcache will record
compilation warnings and replay them when the file is included
again. The primary use case I have in mind for this is automated
testing of the opcache file cache.

This resolves bug #76535.

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JIT refactoring to allow run-time changes of JIT options (triggers, optimization_level, debug flags, etc)

Revert "Fixed crash if jit.trigger is counter based with preload scripts"

This reverts commit 3d4e23aa928ae1451da360d64b849a0720412f7e.

Fixed crash if jit.trigger is counter based with preload scripts

Store aliased name of trait method

Currently, trait methods are aliased will continue to use the
original function name. In a few places in the codebase, we will
try to look up the a

Store aliased name of trait method

Currently, trait methods are aliased will continue to use the
original function name. In a few places in the codebase, we will
try to look up the actual method name instead. However, this does
not work if an aliased method is used indirectly
(https://bugs.php.net/bug.php?id=69180).

I think it would be better to instead actually change the method
name to the alias. This is in principle easy: We have to allow
function_name to be changed even if op array is otherwise shared
(similar to static_variables). This means we need to addref/release
the function_name separately, but I don't think there is a
performance concern here (especially as everything is usually
interned).

There is a bit of complication in opcache, where we need to make
sure that the function name is released the correct number of times
(interning may overwrite the name in the original op_array, but we
need to release it as many times as the op_array is shared).

Fixes bug #69180.
Fixes bug #74939.
Closes GH-5226.

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Use zend_type inside type lists

Instead of having a completely independent encoding for type list
entries. This is going to use more memory, but I'm not particularly
concerned about

Use zend_type inside type lists

Instead of having a completely independent encoding for type list
entries. This is going to use more memory, but I'm not particularly
concerned about that, as type unions that contain multiple classes
should be uncommon. On the other hand, this allows us to treat
top-level types and types inside lists mostly the same.

A new ZEND_TYPE_FOREACH macros allows to transparently treat list
and non-list types the same way. I'm not using it everywhere it could be
used for now, just the places that seemed most obvious.

Of course, this will make any future type system changes much simpler,
as it will not be necessary to duplicate all logic two times.

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Merge branch 'PHP-7.4'

* PHP-7.4:
Fix file cache run_time_cache unserialization
Update ZCSG(map_ptr_last) only if for_shm

Update ZCSG(map_ptr_last) only if for_shm

Otherwise we may get a memory protection fault here. Updating of
ZCSG(map_ptr_last) is handled when loading from file cache to SHM.

Merge branch 'PHP-7.4'

* PHP-7.4:
Addirional fix for bug #78918

Addirional fix for bug #78918

Merge branch 'PHP-7.4'

* PHP-7.4:
Add support for class_alias to preloading
Fixed bug #78935: Check that all linked classes can be preloaded

Add support for class_alias to preloading

Related to bug #78918.

Implement union types

According to RFC: https://wiki.php.net/rfc/union_types_v2

The type representation now makes use of both the pointer payload
and the type mask at the same t

Implement union types

According to RFC: https://wiki.php.net/rfc/union_types_v2

The type representation now makes use of both the pointer payload
and the type mask at the same time. Additionall, zend_type_list is
introduced as a new kind of pointer payload, which is used to store
multiple class types. Each of the class types is a tagged pointer,
which may be either a class name or class entry. The latter is only
used for typed properties, while arguments/returns will instead use
cache slots. A type list can contain a mix of both names and CEs at
the same time, as not all classes may be resolvable.

One thing this is missing is support for union types in arginfo
and stubs, which I want to handle separately.

I've also dropped the special object code from the JIT implementation
for now -- I plan to add this back in a different form at a later time.
For now I did not want to include non-trivial JIT changes together
with large functional changes.

Another possible piece of follow-up work is to implement "iterable"
as an internal alias for "array|Traversable". I believe this will
eliminate quite a few special-cases that had to be implemented.

Closes GH-4838.

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Make zend_type a 2-field struct

We now store the pointer payload and the type mask separately. This
is in preparation for union types, where we will be using both at
the same time.

Make zend_type a 2-field struct

We now store the pointer payload and the type mask separately. This
is in preparation for union types, where we will be using both at
the same time.

To avoid increasing the size of arginfo structures, the
pass_by_reference and is_variadic fields are now stored as part of
the type_mask (8-bit are reserved for custom use).

Different types of pointer payloads are distinguished based on bits
in the type_mask.

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