Allow fiber switching during destructor execution

Fiber switching was disabled during destructor execution due to conflicts
with the garbage collector. This unfortunately introduces a fu

Allow fiber switching during destructor execution

Fiber switching was disabled during destructor execution due to conflicts
with the garbage collector. This unfortunately introduces a function color
problem: destructors can not call functions that may switch Fibers.

In this change we update the GC so that Fiber switching during GC is safe. In
turn we allow Fiber switching during destrutor execution.

The GC executes destructors in a dedicated Fiber. If a destructor suspends, the
Fiber is owned by userland and a new dedicated Fiber is created to execute the
remaining destructors. Destructor suspension results in a resurection of the
object, which is handled as usual: The object is not considered garbage anymore,
but may be collected in a later run.

When the GC is executed in the main context (not in a Fiber), then destructors
are executed in the main context as well because there is no risk of conflicting
with GC in this case (main context can not suspend).

Fixes GH-11389
Closes GH-13460

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Revert GH-10300

Cf. <https://github.com/php/php-src/pull/10220#issuecomment-1383739816>.

This reverts commit 68ada76f9a659745f572539b72afa06fa75a866f.
his reverts commit 45384c6

Revert GH-10300

Cf. <https://github.com/php/php-src/pull/10220#issuecomment-1383739816>.

This reverts commit 68ada76f9a659745f572539b72afa06fa75a866f.
his reverts commit 45384c6e201eda9963e2fcc18946a9446230a2d6.
This reverts commit ef7fbfd71025f034b0bfcb413efd181ce798fc1b.
This reverts commit 9b9ea0d7c696f2990a159b2a2dafbc04547dc10f.
This reverts commit f15747c26be4a2330dc0cf3ea442f53f30f84cac.
This reverts commit e883ba93c40827fafd7868517eb48e04569f76ab.
This reverts commit 7e87551c3775d26e20b06a4032a00053db6452cc.
This reverts commit 921274d2b8966641a00c0a767ae40ba7187bdffc.
This reverts commit fc1f528e5e3ee45ab17ae8dcfad6a6422ff2002d.
This reverts commit 0961715cdafb5d39124667ff94f3b56453ce71f1.
This reverts commit a93f264526e1cdade71d887800c1c448c411bfdc.
This reverts commit 72dd94e1c6d29203b8f6473317f626e6d6d6fbdc.
This reverts commit 29b2dc89645e741f91cc920964432dccd2aaef14.
This reverts commit 05c7653bba7571852f5ce6fc0d220a1a829bc4c0.
This reverts commit 5190e5c260ee05e3f3c3d1168263a1a6637441d0.
This reverts commit 6b55bf228cb2da8705737d414f394950a92d8aae.
This reverts commit 184b4a12d3215d105720d005b31e365249e2eb21.
This reverts commit 4c31b7888a561e920fd3889ba8d99368f3c2d9e6.
This reverts commit d44e9680f080b4918cfed268b96f90ea35975617.
This reverts commit 4069a5c43f419d76e1254c8e49b4cad9968a408f.

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Zend/zend_objects: include cleanup

Add API to prevent Fiber switch in select contexts

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

Destroy constant values before object store

Now that constants can contain objects (currently only enums),
we should destroy them before we free the object store, otherwise
there wil

Destroy constant values before object store

Now that constants can contain objects (currently only enums),
we should destroy them before we free the object store, otherwise
there will be false positive leak reports.

This doesn't affect the fast_shutdown sequence.

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Implement enums

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

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

Closes GH-6489.

Replace zend_bool uses with bool

We're starting to see a mix between uses of zend_bool and bool.
Replace all usages with the standard bool type everywhere.

Of course, zend_bool

Replace zend_bool uses with bool

We're starting to see a mix between uses of zend_bool and bool.
Replace all usages with the standard bool type everywhere.

Of course, zend_bool is retained as an alias.

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Remove delref in free_object_storage

This gives us better object leak diagnostics.

Don't disable object slot reuse while running shutdown functions

We only need to do this once we're running destructors. The current
approach interferes with some event loop code that ru

Don't disable object slot reuse while running shutdown functions

We only need to do this once we're running destructors. The current
approach interferes with some event loop code that runs everything
inside a shutdown function.

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Check for NULL GC type in objects_store_del

This might happen if OBJ_RELEASE is used on an object that was already
released by GC. Specific cases of this issue were previously fixed in

Check for NULL GC type in objects_store_del

This might happen if OBJ_RELEASE is used on an object that was already
released by GC. Specific cases of this issue were previously fixed in
ffaee27478a9cb338e40edeb5acf233f9cb67111 and
72104d2b6ecbbabd18de15f10739be5ce3dc9ce0, however the issue still
affects 3rd-party extensions using OBJ_RELEASE.

The whole GC type NULL + OBJ_IS_VALID + IS_FREE_CALLED system seems
overly complicated and can probably be simplified in 7.4.

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Remove local variables

This patch removes the so called local variables defined per
file basis for certain editors to properly show tab width, and
similar settings. These are mainly

Remove local variables

This patch removes the so called local variables defined per
file basis for certain editors to properly show tab width, and
similar settings. These are mainly used by Vim and Emacs editors
yet with recent changes the once working definitions don't work
anymore in Vim without custom plugins or additional configuration.
Neither are these settings synced across the PHP code base.

A simpler and better approach is EditorConfig and fixing code
using some code style fixing tools in the future instead.

This patch also removes the so called modelines for Vim. Modelines
allow Vim editor specifically to set some editor configuration such as
syntax highlighting, indentation style and tab width to be set in the
first line or the last 5 lines per file basis. Since the php test
files have syntax highlighting already set in most editors properly and
EditorConfig takes care of the indentation settings, this patch removes
these as well for the Vim 6.0 and newer versions.

With the removal of local variables for certain editors such as
Emacs and Vim, the footer is also probably not needed anymore when
creating extensions using ext_skel.php script.

Additionally, Vim modelines for setting php syntax and some editor
settings has been removed from some *.phpt files. All these are
mostly not relevant for phpt files neither work properly in the
middle of the file.

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Adios, yearly copyright ranges

Adios, yearly copyright ranges

micro-optimization

Split zend_objects_store_put() into hot/cold parts

Reorder conditions and set expectation.

Future-proof email addresses

Update email addresses. We're still @Zend, but future proofing it...

Classify object handlers are required/optional

Fixed bug #76846

Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
use

Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
user who changed it.

In Git this functionality is different and can be done with Git attribute
ident. These need to be defined manually for each file in the
.gitattributes file and are afterwards replaced with 40-character
hexadecimal blob object name which is based only on the particular file
contents.

This patch simplifies handling of $Id$ keywords by removing them since
they are not used anymore.

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Fixed bug #76427 (Segfault in zend_objects_store_put)

Export standard object handlers, to avoid indirect access

Keep initialized object_handlers structures in read-only memory.

Use macros to update specific parts of GC_TYPE_INFO() (direct assignments to GC_TYPE(), GC_FLAGS() and GC_INFO() are prohibited)