loongarch64 support for fibers

[qiangxuhui]

Add the necessary asm functions for loongarch64 to support Zend fibers.

The current PHP codebase omits the loongarch64 assembly files for make_fcontext/jump_fcontext from Boost.Context. Sync those from boostorg/context and hook them up.

All fiber related test pass on my Linux/loongarch64 machine.

[qiangxuhui]

Basic testing was done on Linux/loongarch64 using the php-src git repo master branch:

php-test@php-test ~/php-src (loongarch64)> sapi/cli/php run-tests.php Zend/tests/fibers/ 

=====================================================================
PHP         : /home/php-test/php-src/sapi/cli/php 
PHP_SAPI    : cli
PHP_VERSION : 8.4.0-dev
ZEND_VERSION: 4.4.0-dev
PHP_OS      : Linux - Linux php-test 6.9.0-rc1-20240330 #16 SMP PREEMPT_DYNAMIC Sat Mar 30 14:51:34 CST 2024 loongarch64
INI actual  : /home/php-test/php-src
More .INIs  :  
---------------------------------------------------------------------
PHP         : /home/php-test/php-src/sapi/cgi/php-cgi 
PHP_SAPI    : cgi-fcgi
PHP_VERSION : 8.4.0-dev
ZEND_VERSION: 4.4.0-dev
PHP_OS      : Linux - Linux php-test 6.9.0-rc1-20240330 #16 SMP PREEMPT_DYNAMIC Sat Mar 30 14:51:34 CST 2024 loongarch64
INI actual  : /home/php-test/php-src
More .INIs  : 
--------------------------------------------------------------------- 
---------------------------------------------------------------------
PHP         : /home/php-test/php-src/sapi/phpdbg/phpdbg 
PHP_SAPI    : phpdbg
PHP_VERSION : 8.4.0-dev
ZEND_VERSION: 4.4.0-dev
PHP_OS      : Linux - Linux php-test 6.9.0-rc1-20240330 #16 SMP PREEMPT_DYNAMIC Sat Mar 30 14:51:34 CST 2024 loongarch64
INI actual  : /home/php-test/php-src
More .INIs  : 
---------------------------------------------------------------------
CWD         : /home/php-test/php-src
Extra dirs  : 
VALGRIND    : Not used
=====================================================================
Running selected tests.
PASS Backtrace in deeply nested function call [Zend/tests/fibers/backtrace-deep-nesting.phpt] 
PASS Backtrace in nested function call [Zend/tests/fibers/backtrace-nested.phpt] 
PASS Backtrace in with object as fiber callback [Zend/tests/fibers/backtrace-object.phpt] 
PASS Multiple calls to constructor are prevented after fiber terminated [Zend/tests/fibers/call-to-ctor-of-terminated-fiber.phpt] 
PASS Catch exception thrown into fiber, then suspend again [Zend/tests/fibers/catch-then-suspend.phpt] 
PASS Catch exception thrown into fiber [Zend/tests/fibers/catch.phpt] 
PASS Print backtrace in fiber [Zend/tests/fibers/debug-backtrace.phpt] 
PASS Start on already running fiber [Zend/tests/fibers/double-start.phpt] 
PASS Error reporting change reflected inside fiber [Zend/tests/fibers/error-reporting.phpt] 
PASS Exit from fiber [Zend/tests/fibers/exit-in-fiber.phpt] 
PASS Test throwing from fiber [Zend/tests/fibers/failing-fiber.phpt] 
PASS Test throwing from fiber [Zend/tests/fibers/failing-nested-fiber.phpt] 
PASS Fast finishing fiber does not leak [Zend/tests/fibers/fast-finish-fiber.phpt] 
PASS Fatal error in new fiber [Zend/tests/fibers/fatal-error-in-fiber.phpt] 
PASS Fatal error within a nested fiber [Zend/tests/fibers/fatal-error-in-nested-fiber.phpt] 
PASS Fatal error in a fiber with other active fibers [Zend/tests/fibers/fatal-error-with-multiple-fibers.phpt] 
PASS FiberError cannot be constructed in user code [Zend/tests/fibers/fiber-error-construct.phpt] 
PASS Fiber::getCurrent() [Zend/tests/fibers/fiber-get-current.phpt] 
PASS Fiber in shutdown function [Zend/tests/fibers/fiber-in-shutdown-function.phpt] 
PASS Fiber status methods [Zend/tests/fibers/fiber-status.phpt] 
PASS GC can cleanup cycle when callback references fiber [Zend/tests/fibers/gc-cycle-callback.phpt] 
PASS GC can cleanup cycle when fiber result references fiber [Zend/tests/fibers/gc-cycle-result.phpt] 
PASS Fiber::getReturn() after bailout [Zend/tests/fibers/get-return-after-bailout.phpt] 
PASS Fiber::getReturn() after a fiber throws [Zend/tests/fibers/get-return-after-throwing.phpt] 
PASS Fiber::getReturn() from unstarted fiber [Zend/tests/fibers/get-return-from-unstarted-fiber.phpt] 
PASS Fiber::getReturn() in unfinished fiber [Zend/tests/fibers/get-return-in-unfinished-fiber.phpt] 
PASS Test fiber return value [Zend/tests/fibers/get-return.phpt] 
PASS GH-10249 (Assertion `size >= page_size + 1 * page_size' failed.) [Zend/tests/fibers/gh10249.phpt] 
PASS Bug GH-10340 001 (Assertion in zend_fiber_object_gc()) [Zend/tests/fibers/gh10340-001.phpt] 
PASS Bug GH-10340 002 (Assertion in zend_fiber_object_gc()) [Zend/tests/fibers/gh10340-002.phpt] 
PASS Bug GH-10340 003 (Assertion in zend_fiber_object_gc()) [Zend/tests/fibers/gh10340-003.phpt] 
PASS GH-10437 (Segfault/assertion when using fibers in shutdown function after bailout) [Zend/tests/fibers/gh10437.phpt] 
PASS Bug GH-10496 001 (Segfault when garbage collector is invoked inside of fiber) [Zend/tests/fibers/gh10496-001.phpt] 
PASS Bug GH-10496 002 (Segfault when garbage collector is invoked inside of fiber) [Zend/tests/fibers/gh10496-002.phpt] 
PASS Bug GH-9735 001 (Fiber stack variables do not participate in cycle collector) [Zend/tests/fibers/gh9735-001.phpt] 
PASS Bug GH-9735 002 (Fiber stack variables do not participate in cycle collector) [Zend/tests/fibers/gh9735-002.phpt] 
PASS Bug GH-9735 003 (Fiber stack variables do not participate in cycle collector) [Zend/tests/fibers/gh9735-003.phpt] 
PASS Bug GH-9735 004 (Fiber stack variables do not participate in cycle collector) [Zend/tests/fibers/gh9735-004.phpt] 
PASS Bug GH-9735 005 (Fiber stack variables do not participate in cycle collector) [Zend/tests/fibers/gh9735-005.phpt] 
PASS Bug GH-9735 006 (Fiber stack variables do not participate in cycle collector) [Zend/tests/fibers/gh9735-006.phpt] 
PASS Bug GH-9735 007 (Fiber stack variables do not participate in cycle collector) [Zend/tests/fibers/gh9735-007.phpt] 
PASS Bug GH-9735 008 (Fiber stack variables do not participate in cycle collector) [Zend/tests/fibers/gh9735-008.phpt] 
PASS Bug GH-9735 009 (Fiber stack variables do not participate in cycle collector) [Zend/tests/fibers/gh9735-009.phpt] 
PASS Reference to invocable class retained while running [Zend/tests/fibers/invocable-class.phpt] 
PASS Multiple calls to constructor are prevented [Zend/tests/fibers/multiple-calls-to-ctor.phpt] 
PASS fiber.stack_size must be a positive number [Zend/tests/fibers/negative_stack_size.phpt] 
PASS Cannot resume fiber within destructor [Zend/tests/fibers/no-switch-dtor-resume.phpt] 
PASS Cannot start fiber within destructor [Zend/tests/fibers/no-switch-dtor-start.phpt] 
PASS Cannot suspend fiber within destructor [Zend/tests/fibers/no-switch-dtor-suspend.phpt] 
PASS Cannot resume fiber within destructor [Zend/tests/fibers/no-switch-dtor-throw.phpt] 
PASS Cannot start a new fiber in a finally block in a force-closed fiber [Zend/tests/fibers/no-switch-force-close-finally.phpt] 
PASS Context switches are prevented during GC collect cycles [Zend/tests/fibers/no-switch-gc.phpt] 
PASS Out of Memory in a fiber [Zend/tests/fibers/out-of-memory-in-fiber.phpt] 
PASS Out of Memory in a nested fiber [Zend/tests/fibers/out-of-memory-in-nested-fiber.phpt] 
PASS Out of Memory from recursive fiber creation [Zend/tests/fibers/out-of-memory-in-recursive-fiber.phpt] 
PASS Resume non-running fiber [Zend/tests/fibers/resume-non-running-fiber.phpt] 
PASS Resume previous fiber [Zend/tests/fibers/resume-previous-fiber.phpt] 
PASS Resume running fiber [Zend/tests/fibers/resume-running-fiber.phpt] 
PASS Resume terminated fiber [Zend/tests/fibers/resume-terminated-fiber.phpt] 
PASS Test resume [Zend/tests/fibers/resume.phpt] 
PASS Fiber function may return by ref, but getReturn() always returns by val [Zend/tests/fibers/return-by-ref.phpt] 
SKIP Prevent switching fibers when async signals are enabled [Zend/tests/fibers/signal-async.phpt] reason: Required extension missing: pcntl
SKIP Prevent switching fibers when dispatching pending signals [Zend/tests/fibers/signal-dispatch.phpt] reason: Required extension missing: pcntl
PASS Silence operator does not leak out of fiber [Zend/tests/fibers/silence-operator-inside-fiber.phpt] 
PASS Silence operator does not leak into fiber [Zend/tests/fibers/silence-operator-outside-fiber.phpt] 
PASS Arguments to fiber callback [Zend/tests/fibers/start-arguments.phpt] 
PASS Suspend in force-closed fiber after shutdown [Zend/tests/fibers/suspend-in-force-close-fiber-after-shutdown.phpt] 
PASS Suspend in force-closed fiber, catching exception thrown from destructor [Zend/tests/fibers/suspend-in-force-close-fiber-catching-exception.phpt] 
PASS Suspend in force-closed fiber [Zend/tests/fibers/suspend-in-force-close-fiber.phpt] 
PASS Suspend within nested function call [Zend/tests/fibers/suspend-in-nested-function.phpt] 
PASS Suspend outside fiber [Zend/tests/fibers/suspend-outside-fiber.phpt] 
PASS Make sure exceptions are rethrown when throwing from fiber destructor [Zend/tests/fibers/throw-during-fiber-destruct.phpt] 
PASS Throw in multiple destroyed fibers after shutdown [Zend/tests/fibers/throw-in-multiple-destroyed-fibers-after-shutdown.phpt] 
PASS Throw into non-running fiber [Zend/tests/fibers/throw-into-non-running-fiber.phpt] 
PASS Test throwing into fiber [Zend/tests/fibers/throw.phpt] 
PASS Prevent switching fibers in tick function [Zend/tests/fibers/ticks.phpt] 
PASS Test unfinished fiber with finally block [Zend/tests/fibers/unfinished-fiber-with-finally.phpt] 
PASS Test unfinished fiber with nested try/catch blocks [Zend/tests/fibers/unfinished-fiber-with-nested-try-catch.phpt] 
PASS Test unfinished fiber with suspend in finally [Zend/tests/fibers/unfinished-fiber-with-suspend-in-finally.phpt] 
PASS Test unfinished fiber with suspend in finally [Zend/tests/fibers/unfinished-fiber-with-throw-in-finally.phpt] 
PASS Test unfinished fiber [Zend/tests/fibers/unfinished-fiber.phpt] 
PASS Not starting a fiber does not leak [Zend/tests/fibers/unstarted-fiber.phpt] 
=====================================================================
Number of tests :    82                80
Tests skipped   :     2 (  2.4%) --------
Tests warned    :     0 (  0.0%) (  0.0%)
Tests failed    :     0 (  0.0%) (  0.0%)
Tests passed    :    80 ( 97.6%) (100.0%)
---------------------------------------------------------------------
Time taken      : 0.757 seconds
=====================================================================

[devnexen]

Thank you !