Implement stackless internal function calls

Co-authored-by: Dmitry Stogov <dmitry@zend.com>

Closes GH-12461

Remove unused Makefile variables FIBER_ASSEMBLER and FIBER_ASM_ARCH

In Windows build system these were replaced with common PHP_ASSEMBLER
and FIBER_ASM_ABI when adjusting for the arm64.

Remove unused Makefile variables FIBER_ASSEMBLER and FIBER_ASM_ARCH

In Windows build system these were replaced with common PHP_ASSEMBLER
and FIBER_ASM_ABI when adjusting for the arm64.

Closes GH-13263

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Sync Zend/Optimizer headers installation (#13201)

On *nix installation there is zend_dfg.h installed as part of the bug
fix #81136, but it wasn't synced with Windows yet. This now syncs

Sync Zend/Optimizer headers installation (#13201)

On *nix installation there is zend_dfg.h installed as part of the bug
fix #81136, but it wasn't synced with Windows yet. This now syncs Zend
headers on both builds.

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Add zend_worklist.h to PHP_INSTALL_HEADERS (#12571)

Fixes GH-12565

Remove unused ZEND_STACK_GROWS_DOWNWARDS constant (#11762)

Expose time spent collecting cycles in gc_status() (#11523)

Limit stack size (#9104)

Windows arm64 build system support

Closes GH-9116.

Introduction of timing attack safe bcmp implementation.

Nothing new but to refactor usage b/w hash and password
extensions but using volatile pointers to be a bit safer,
allowing to

Introduction of timing attack safe bcmp implementation.

Nothing new but to refactor usage b/w hash and password
extensions but using volatile pointers to be a bit safer,
allowing to expand its usage eventually.

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Make vm_interrupt and timed_out atomic (#8327)

This is done by adding a new zend_atomic_bool type. The type
definition is only available for compiler alignment and size info; it
shou

Make vm_interrupt and timed_out atomic (#8327)

This is done by adding a new zend_atomic_bool type. The type
definition is only available for compiler alignment and size info; it
should be treated as opaque and only the zend_atomic_bool_* family of
functions should be used.

Note that directly using atomic_bool is complicated. All C++ compilers
stdlibs that I checked typedef atomic_bool to std::atomic<bool>, which
can't be used in an extern "C" section, and there's at least one usage
of this in core, and probably more outside of it.

So, instead use platform specific functions, preferring compiler
intrinsics.

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Quote when adding to connection string in (PDO_)ODBC

Because the UID= and PWD= values are appended to the SQLDriverConnect
case when credentials are passed, we have to append them to the

Quote when adding to connection string in (PDO_)ODBC

Because the UID= and PWD= values are appended to the SQLDriverConnect
case when credentials are passed, we have to append them to the string
in case users are relying on this behaviour. However, they must be
quoted, or the arguments will be invalid (or possibly more injected).
This means users had to quote arguments or append credentials to the raw
connection string themselves.

It seems that ODBC quoting rules are consistent enough (and that
Microsoft trusts them enough to encode into the .NET BCL) that we can
actually check if the string is already quoted (in case a user is
already quoting because of this not being fixed), and if not, apply the
appropriate ODBC quoting rules.

This is because the code exists in main/, and are shared between
both ODBC extensions, so it doesn't make sense for it to only exist
in one or the other. There may be a better spot for it.

Closes GH-8307.

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sapi/*: move duplicate "--define" code to library

Drop TsHashTable (#7351)

Implement Fibers

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

Closes GH-6875.

Implement enums

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

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

Closes GH-6489.

Move optimizer into core

This only moves the files, adjusts the build system, exports APIs
and does minor fixups to make sure the code builds.

This does not yet try to make the

Move optimizer into core

This only moves the files, adjusts the build system, exports APIs
and does minor fixups to make sure the code builds.

This does not yet try to make the optimizer usable independently
of opcache.

Closes GH-6642.

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Tweak some macro definition on Windows

Closes GH-5606

Add system ID entropy API

The `zend_system_id` is a (true global) system ID that fingerprints a process state. When extensions add engine hooks during MINIT/startup, entropy is added the sys

Add system ID entropy API

The `zend_system_id` is a (true global) system ID that fingerprints a process state. When extensions add engine hooks during MINIT/startup, entropy is added the system ID for each hook. This allows extensions to identify that changes have been made to the engine since the last PHP process restart.

Closes GH-5871

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Add zend_observer API

Closes GH-5857.

Co-authored-by: Nikita Popov <nikita.ppv@gmail.com>
Co-authored-by: Sammy Powers <sammyk@datadoghq.com>

Add Attributes

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

Fix PVS-Studio integration

Without this configuration option, PVS-Studio looks for preprocessed
files (*.i), but these do not exists.

Fix --disable-ipv6 support on Windows

`HAVE_IPV6` and `HAVE_GAI_STRERROR` are supposed to be undefined now,
if not supported.

Remove mergesort implementation

php_mergesort() isn't being used for anything, and hasn't been for
a long time. Even if we wanted to use a stable sort, this isn't
the implementation

Remove mergesort implementation

php_mergesort() isn't being used for anything, and hasn't been for
a long time. Even if we wanted to use a stable sort, this isn't
the implementation we'd use...

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Enable UBSan in addition to ASan

UBSan is a useful tool, so we enable it for `--enable-sanitizer` in
addition to ASan.

Remove unused build checks

- yp_get_default_domain was part of ext/yp
- functions checks produce HAVE_function_name symbols. These checks are
currently not used in php-src neither

Remove unused build checks

- yp_get_default_domain was part of ext/yp
- functions checks produce HAVE_function_name symbols. These checks are
currently not used in php-src neither in the extensions out there.
- Removed symbols because they are not used in the code:
- HAVE_GCVT
- HAVE_PUTENV
- HAVE_PUTENV
- HAVE_SETVBUF
- HAVE_TEMPNAM
- HAVE_SIN (sin is also defined in C89 standard)
- HAVE_SETSOCKOPT
- HAVE_LOCKF
- HAVE_ISASCII
- HAVE_YP_GET_DEFAULT_DOMAIN (and other yp extension related unused checks)
- HAVE_LINK
- HAVE_USLEEP is already defined in Windows configuration header
- HAVE_LIBBIND has not been used in php-src for a while anymore
- HAVE_GETHOSTNAME is duplicated in Windows configuration header

Closes GH-4417

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