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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Suppress zend signals check in two readline tests

Installing a callback handler may cause libedit to register new
signals during the request.

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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implement tsrm_is_shutdown API

Remove HAVE_SIGNAL_H

The `<signal.h>` header file is part of the standard C89 headers [1] and
on current systems can be included unconditionally.

Since file requires at least C8

Remove HAVE_SIGNAL_H

The `<signal.h>` header file is part of the standard C89 headers [1] and
on current systems can be included unconditionally.

Since file requires at least C89 or greater, the `HAVE_SIGNAL_H` symbol
defined by Autoconf in Zend.m4 [2] can be ommitted and simplifed.

The bundled libmagic (file) also ommits the usage of HAVE_SIGNAL_H since
5.35 however current version in PHP is very modified 5.34 version and
will be refactored separately. Check for HAVE_SIGNAL_H is therefore
still done in the configure.ac.

Refs:
[1] https://port70.net/~nsz/c/c89/c89-draft.html#4.1.2
[2] https://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/headers.m4

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Implemented a faster way to access predefined TSRM resources - CG(), EG(), etc.

Avoid reinitailization of ZTS cache pointer. Initialize it once in TSRM.c

Update and fix remaining year ranges (2019)

This patch follows previous license year ranges updates. With new
approach source code files now have simplified headers with license
info

Update and fix remaining year ranges (2019)

This patch follows previous license year ranges updates. With new
approach source code files now have simplified headers with license
information without year ranges.

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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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Fix bug #71041 dynamic embed SAPI load error

If the library is built with ZEND_SIGNALS defined, it's unusable with an
external SAPI module because the zend_signal_startup() call is manda

Fix bug #71041 dynamic embed SAPI load error

If the library is built with ZEND_SIGNALS defined, it's unusable with an
external SAPI module because the zend_signal_startup() call is mandatory
in this case.

This bug is similar to #74149, but related to dynamic loading of PHP library.

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Added possiblity to avoid signal handlers reinitialization on each request.

Trim trailing whitespace in source code files

Trim trailing whitespace in source code files

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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Trailing whitespaces

Signed-off-by: Gabriel Caruso <carusogabriel34@gmail.com>

Happy new year (Update copyright to 2018)

further sync for vim mode lines

Fixed bug #74353 (Segfault when killing within bash script trap code)

improve signal globals consistency check for TS

Seems when we receive TERM, TLS is destroyed completely. In that case,
not only signal globals, but the entire globals array doesn't exist

improve signal globals consistency check for TS

Seems when we receive TERM, TLS is destroyed completely. In that case,
not only signal globals, but the entire globals array doesn't exist
anymore.

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do not try to handle signals, when globals are inconsistent

Fixed bug #73783

Bug #73783 raises an issue with signal handling when using SIG_IGN.
With PHP7.1 ZEND_SIGNALS is defaulted to on, which will for all
signals set the handler as zend_s

Fixed bug #73783

Bug #73783 raises an issue with signal handling when using SIG_IGN.
With PHP7.1 ZEND_SIGNALS is defaulted to on, which will for all
signals set the handler as zend_signal_handler_defer. This is
problematic for syscalls like sleep(), which will only return when the
requisite number of seconds have elapsed, or, a non-ignored signal is
raised. In this case we want to SIG_IGN SIGCHLD, however, SIG_IGN is
only stored in the SIGG(handlers) array, and the actual system level
handler is defined. This prevents proper signal ignoring when requeted.

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Fallback to kill() if raise() doesn't work

Add temporary workaround for raise() failure

Fixed compilation warnings

Cleanup zend_signal API