IBM i PASE doesn't support ITIMER_PROF

Like Cygwin, this platform needs to use a real-time timer.

This was based on a patch by @kadler, but it didn't handle unsetting
the timer,

IBM i PASE doesn't support ITIMER_PROF

Like Cygwin, this platform needs to use a real-time timer.

This was based on a patch by @kadler, but it didn't handle unsetting
the timer, so the timeout would continue to be active, triggering
`hard_timeout` unexpectedly. The patch is fixed to handle unsetting.

Closes GH-6503.

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FIxed bug #80299

The must_wrap was leaking across iterations.

Revert "Change calling convention of zval_update_constant[_ex]() to fastcall."

This reverts commit 5a447b086bba450d61c283adfecbdec657cc5f34.

Revert this ABI break from PHP-8.0, leav

Revert "Change calling convention of zval_update_constant[_ex]() to fastcall."

This reverts commit 5a447b086bba450d61c283adfecbdec657cc5f34.

Revert this ABI break from PHP-8.0, leaving it only on master.

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Change calling convention of zval_update_constant[_ex]() to fastcall.

Cleanup observer API and add JIT support

Improve error messages mentioning parameters instead of arguments

Closes GH-5999

Accept zend_string instead of zval in zend_compile_string

Add zend_observer API

Closes GH-5857.

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

Correctly report failure in zend_handle_undef_args()

And do the check before increfing the closure object, otherwise
we'd have to release it as well.

Fixes oss-fuzz #25313.

Fix trampoline leak in array_map

Improve type declarations for Zend APIs

Voidification of Zend API which always succeeded
Use bool argument types instead of int for boolean arguments
Use bool return type for functio

Improve type declarations for Zend APIs

Voidification of Zend API which always succeeded
Use bool argument types instead of int for boolean arguments
Use bool return type for functions which return true/false (1/0)
Use zend_result return type for functions which return SUCCESS/FAILURE as they don't follow normal boolean semantics

Closes GH-6002

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Export and reuse zend_is_valid_class_name API

Unserialization does the same check as zend_lookup_class, so let's
share the same optimized implementation.

Fix refcounting for the named params case as well

Adjust the test case to pass a refcounted value and to also check
the named params case.

Fix refcounting

Fix #79979: passing value to by-ref param via CUFA crashes

If a by-val send is not allowed, we must not do so. Instead we wrap
the value in a temporary reference.

Closes GH-6000

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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Fix bug #79900

Run debug build shutdown GC regardless even if GC has been disabled.
Of course, this only does something meaningful if the GC has been
disabled at runtime and root col

Fix bug #79900

Run debug build shutdown GC regardless even if GC has been disabled.
Of course, this only does something meaningful if the GC has been
disabled at runtime and root collection is still enabled. We cannot
prevent leaks if GC is disabled completely.

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Review the usage of apostrophes in error messages

Closes GH-5590

Remove no_separation flag

Correctly determine arg name of USER_ARG_INFO functions

Reuse warning function

Make exit() unwind properly

exit() is now internally implemented by throwing an exception,
performing a normal stack unwind and a clean shutdown. This ensures
that no persistent reso

Make exit() unwind properly

exit() is now internally implemented by throwing an exception,
performing a normal stack unwind and a clean shutdown. This ensures
that no persistent resource leaks occur.

The exception is internal, cannot be caught and does not result in
the execution of finally blocks. This may be relaxed in the future.

Closes GH-5768.

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More efficient check for valid class name

Use a bitset of valid characters instead of strspn. This is both
more efficient and more compact.

Cleanup SPL autoload implementation

Replace EG(autoload_func) with a C level zend_autoload hook.
This avoids having to do one indirection through PHP function
calls. The need for EG(

Cleanup SPL autoload implementation

Replace EG(autoload_func) with a C level zend_autoload hook.
This avoids having to do one indirection through PHP function
calls. The need for EG(autoload_func) was a leftover from the
__autoload() implementation.

Additionally, drop special-casing of spl_autoload(), and instead
register it just like any other autoloading function. This fixes
bug #71236 as a side-effect.

Finally, change spl_autoload_functions() to always return an array.
The distinction between false and an empty array no longer makes
sense here.

Closes GH-5696.

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Back up fake_scope in zend_call_function

We regularly find new places where we forgot to reset fake_scope.
Instead of having to handle this for each caller of zend_call_function()
an

Back up fake_scope in zend_call_function

We regularly find new places where we forgot to reset fake_scope.
Instead of having to handle this for each caller of zend_call_function()
and similar APIs, handle it directly in zend_call_function().

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