Remove HAVE_LIMITS_H

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

Since PHP requires at least C89

Remove HAVE_LIMITS_H

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

Since PHP requires at least C89 or greater, the `HAVE_LIMITS_H` symbol
defined by Autoconf in configure.ac [2] can be ommitted and simplifed
however due to bundled file library (libmagic) and timelib still using
it, the removal there was omitted and done only in Zend.m4 file.

Current bundled libraries libtime, oniguruma, and libmagic still include
partial `HAVE_LIMITS_H` usage and will be more refactored when this is
possible.

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

Fix shifting signed values too far

Signed shift of 31 for int and 63 for long is flagged as undefined
behavior by UBSan (-fsanitize=undefined) and seems to be indeed so
according to

Fix shifting signed values too far

Signed shift of 31 for int and 63 for long is flagged as undefined
behavior by UBSan (-fsanitize=undefined) and seems to be indeed so
according to the standard.

The patch converts such cases to use unsigned.

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Fix shifting signed values too far

Signed shift of 31 for int and 63 for long is flagged as undefined
behavior by UBSan (-fsanitize=undefined) and seems to be indeed so
according to

Fix shifting signed values too far

Signed shift of 31 for int and 63 for long is flagged as undefined
behavior by UBSan (-fsanitize=undefined) and seems to be indeed so
according to the standard.

The patch converts such cases to use unsigned.

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Unused parameter

Keep original debug info

Fix typos in code comments in Zend/ [skip ci]

Make MADV_HUGEPAGE conditional on USE_ZEND_ALLOC_HUGE_PAGES

There have been multiple reports of large slowdowns due to the
use of MADV_HUGEPAGE, so make it conditional on
USE_ZEND_AL

Make MADV_HUGEPAGE conditional on USE_ZEND_ALLOC_HUGE_PAGES

There have been multiple reports of large slowdowns due to the
use of MADV_HUGEPAGE, so make it conditional on
USE_ZEND_ALLOC_HUGE_PAGES, just like MAP_HUGETLB already is.

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Use mremap in zend_mm_chunk_extend if available

As suggested by https://twitter.com/grsecurity. This saves an
mmap+munmap cycle in case the mapping cannot be extended in-place.

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

Don't hide real peak usage.

Reduce amount of updated memory

Provide is_zend_ptr() function to check if a pointer lays in Zend MM heap.

Support huge pages on FreeBSD

FreeBSD provides MAP_ALIGNED_SUPER for a similar purpose as
MAP_HUGETLB on Linux, so add it as an alias.

Huge pages still have to be explicitly ena

Support huge pages on FreeBSD

FreeBSD provides MAP_ALIGNED_SUPER for a similar purpose as
MAP_HUGETLB on Linux, so add it as an alias.

Huge pages still have to be explicitly enabled through the
USE_ZEND_ALLOC_HUGE_PAGES environment variable.

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Future-proof email addresses

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

Allow switching back to Zend MM heap.

Remove __USE_GNU defines

This is an internal glibc macro, it should not be necessary to use
it if we already define _GNU_SOURCE (we do through
AC_USE_SYSTEM_EXTENSIONS). Needing to u

Remove __USE_GNU defines

This is an internal glibc macro, it should not be necessary to use
it if we already define _GNU_SOURCE (we do through
AC_USE_SYSTEM_EXTENSIONS). Needing to use __USE_GNU generally
indicates an inclusion order problem (libc header included before
config.h).

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Remove unused MREMAP_MAYMOVE compatibility define

Fix localized error messages and memory leaks

The FormatMessage API needs to LocalFree the delivered error messages.
In cases where messages are delivered in non ASCII compatible encodin

Fix localized error messages and memory leaks

The FormatMessage API needs to LocalFree the delivered error messages.
In cases where messages are delivered in non ASCII compatible encoding,
the messages might be unreadable. This aligns the error message encoding
with the encoding settings in PHP, the focus is UTF-8 as default.

Initialize error buffer

Avoid code duplication

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Support fixed address mmap without replacement

Reapply changes for Zend fixed mapping but only for FreeBSD.
Other BSD might expose some day a similar flag (private
for OpenBSD for th

Support fixed address mmap without replacement

Reapply changes for Zend fixed mapping but only for FreeBSD.
Other BSD might expose some day a similar flag (private
for OpenBSD for the moment for example).
The Linux's part could be brought back but not before 7.4,
at this time, distributions with kernel > 4.17 will be
more widely available.

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Revert "Support fixed address mmap without replacement"

This reverts commit 0f68ff5c92924deb9401ce66458e67f250ccde74.