Preloading is not comatible with dl() function

Merge branch 'PHP-7.4'

* PHP-7.4:
Fixed bug #78376 (Incorrect preloading of constant static properties)

Fixed bug #78376 (Incorrect preloading of constant static properties)

Merge branch 'PHP-7.4'

* PHP-7.4:
Fix build for --disable-signals

Fix build for --disable-signals

Merge branch 'PHP-7.4'

Merge branch 'PHP-7.3' into PHP-7.4

Merge branch 'PHP-7.2' into PHP-7.3

Fix Zend signals unblocking

There are a few parts here:
* opcache should not be blocking signals while invoking compile_file,
otherwise signals may remain blocked on a compile er

Fix Zend signals unblocking

There are a few parts here:
* opcache should not be blocking signals while invoking compile_file,
otherwise signals may remain blocked on a compile error. While at
it, also protect SHM memory during compile_file.
* We should deactivate Zend signals at the end of the request, to make
sure that we gracefully recover from a missing unblock and signals
don't remain blocked forever.
* We don't use a critical section in deactivation, because it should
not be necessary. Additionally we want to clean up the signal queue,
if it is non-empty.
* Enable SIGG(check) in debug builds so we notice issues in the future.

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Merge branch 'PHP-7.4'

* PHP-7.4:
Allow multiple cache instances per user/host on Windows

Allow multiple cache instances per user/host on Windows

Formerly, there was at most a single OPcache instance per user and the
so called system ID (which is determined from the PHP versi

Allow multiple cache instances per user/host on Windows

Formerly, there was at most a single OPcache instance per user and the
so called system ID (which is determined from the PHP version).
Sometimes multiple OPcaches might be desired, though, particularly for
unrelated CLI scripts, which may even be necessary (e.g. for our test
suite in parallel mode).

We therefore introduce a new INI directive `opcache.cache_id` which
allows to configure independent OPcache instances for the same user.

We also use `GetUserNameW()` instead of `php_win32_get_username()`,
because the latter retrieves the user name encoded in the
`default_charset`, which can obviously yield different results for
different charsets, leading to OPcache "incompatibilities". Slightly
worse, some characters may not even be encodeable in the
`default_charset` and would be replaced by question marks, which could
result in different users sharing the same OPcache.

We also refactor, and re-use existing APIs to avoid duplicated code.

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Merge branch 'PHP-7.4'

Remove ZEND_HANDLE_MAPPED

The buf/len members are now simply used in addition to the main
stream, without changing the handle kind.

Merge branch 'PHP-7.4'

Introduce zend_stream_init_filename()

Avoid more ad-hoc initialization of zend_file_handle structures.

Merge branch 'PHP-7.4'

Remove ZEND_HANDLE_FD

This handle type was unused.

Merge branch 'PHP-7.4'

Preloading: Don't move conditional functions to back to scripts

Conditional function declaration may be referenced by functions or
classes that have been preloaded, so we should not move

Preloading: Don't move conditional functions to back to scripts

Conditional function declaration may be referenced by functions or
classes that have been preloaded, so we should not move them back
to scripts.

What we probably should be doing though is to discard conditional
functions that are not used in the optimizer. This is probably
reasonably common for polyfills, where we will be able to const-eval
the conditions and drop the BBs declaring the functions, but won't
delete the function declarations themselves.

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Merge branch 'PHP-7.4'

Preloading: Relax known type restrictions

Check whether there is a parent/interface/trait method with the same
name and only then require the type to be known. This reduces the
numbe

Preloading: Relax known type restrictions

Check whether there is a parent/interface/trait method with the same
name and only then require the type to be known. This reduces the
number of cases where this triggers in practice a lot.

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Preloading: Also handle trait methods outside main script

Merge branch 'PHP-7.4'

Preloading: Prevent autoloading while resolving constants

Merge branch 'PHP-7.4'