Fixed GH-12596: Segmentation fault on AArch64 release build with opcache.jit=1112 (#12813)

A new PHP JIT implementation based on IR JIT framework (#12079)

* IR update

* Use folding to allow constant folding and common subexpression elimination

* Implement IR JIT

A new PHP JIT implementation based on IR JIT framework (#12079)

* IR update

* Use folding to allow constant folding and common subexpression elimination

* Implement IR JIT for INIT_FCALL, INIT_FCALL_BY_NAME and INIT_NS_FCALL_BY_NAME

* Implement IR JIT for SEND_VAL and SEND_VAL_EX

* Implement IR JIT for SEND_REF

* Implement IR JIT for SEND_VAR* instructions (incompltere - few tests failures)

* Implement IR JIT for CHECK_FUNC_ARG

* Implement IR JIT for CHECK_UNDEF_ARGS

* Implement IR JIT for ROPE_INIT, ROPE_ADD and ROPE_END

* Implement IR JIT for FREE, FE_FREE, ECHO, STRLEN and COUNT

* Implement IR JIT for IN_ARRAY

* Implement IR JIT support for separate VM stack overflow check

* Implement IR JIT for INIT_DYNAMIC_CALL

* Implemenr IR JIT for INIT_METHOD_CALL

* Fix IR JIT for IN_ARRAY and COUNT

* Implement IR JIT for VERIFY_RETURN_TYPE

* Force C compiler to store preserved registers to allow JIT using them

* Implement IR JIT for DO_FCALL, DO_UCALL, DO_ICALL and DO_FCALL_BY_NAME

* Implement IR JIT for FETCH_CONSTANT

* Fix (reverse) guard conditions

* Implement IR JIT for RECV and RECV_INIT

* Implement IR JIT for RETURN

* Implement IR JIT for BIND_GLOBAL

* Fix guard for: int++ => double

* Fix exception handling

* Allow deoptimization of zval type only (if some register is spilled by the IR engine)

* Fix overflow handling

* Implement IR JIT for FE_RESET_R and FE_FETCH_R

* Eliminate extra temporary register

* Better registers usage

* Implement IR JIT for FETCH_DIM_* and ISSET_DIM

* Implement IR JIT for ASSIGN_DIM and ASSIGN_DIM_OP

* cleanup

* Generae IR that produces a better x86[_64] code

* Allow trace register allocation for live ranges terminated before entering a called function

* Remove following END->BEGIN nodes during IR construction

* Remove useless (duplicate) guard

* Avoid useless exception check

* Prevent duplicate store

* Eliminate repatable re-assignment of stack zval types

* Enable combination of some instructions with the following SEND_VAL for IR JIT

* Avoid generation of useless RLOADs

* Eliminatare refcouting in a sequence of FETCH_DIM_R

* Fix assertion

* Remove ZREG_ZVAL_ADDREF flag from an element of abstract stack

* Implement IR JIT for FETCH_OBJ_*

* Implement IR JIT for ASSIGN_OBJ

* Implement IR JIT for ASSIGN_OBJ_OP

* cleanup

* Implement IR JIT for (PRE/POST)_(INC/DEC)_OBJ

* ws

* cleanup

* Fix IR JIT for constructor call

* Fix opcache.jit=1201 IR JIT.

With opcache.jit=1201 we still have to generate code for follow and target basic blocks with single exiting VM instruction. We mat just omit the entry point.

* Fix IR construction for the case when both IF targets are the same

* Avoid PHP LEAVE code duplication in function IR JIT.

* Reload operands from memeory when overflow (this improves hot code)

* Implement IR JIT for SWITCH_LONG, SWITCH_STRING and MATCH

* Initialize result to IS_UNDEF

* Fix JIT integraion with observer (Zend/tests/gh10346.phpt failure)

* Fix incorrect compilation of FE_FETCH with predicted empty array

* Fix register allocation

* Use sign extension inxted of zero

* Fix trace register allocator

* cleanp

* Fix address sanitizer warning

* Calculate JIT trace prologue sixe on startup (to avoid magic constants).

* Add cgecks for merge arrays overflow (this should be refactored using lists)

* Cache TLS access to perform corresponding read once per basic block

* cleanup unused variable

* Fix IR JIT support for CLANG build (CALL VM without global register variables)

* Fix IR JIT for CALL VM with global register variables

* Allow %rpb ysage in JIT for CALL VM (we save and restore it in prologue/epilogue anyway)

* cleanup

* Allocate enough fixed stack to keep preserved registers

* We don't have to care about x29 and x30

* cleanup (JMPZ/NZ_EX work fine)

* Revert "cleanup (JMPZ/NZ_EX work fine)"

This reverts commit cf8dd74a040e225d290d8ac4f5e33df638e6f8b8.

* Don't allocate register for PHP variables that are loaded from memory and used once

* Eliminate redundand deoptimization stores

* cleanup

* cleanup

* cleanup

* Optimization for constant comparison

* Cleanup and elimination of dead deoptimization stores

* Eliminate duplicate constant loading

* Set proper initial SP offset info for GDB backtraces

This doesn't take into account the following SP/FP modifications

* Add spill stores

* Remove low limit on number of deoptimization constants

* Emit dead code only when it's really necessary for IR graph

* cleanup

* cleanup

* Prefer loading long constants from memory (instead of loading immediate value)

* Regiter disasm labels using macros (add missing helpers)

* Make IR franework to care about GUARD JMP reordering

* Avoid reloading

* Improve register allocation for IR tracing JIT

* Add comment

* Fix deoptimization on result type guard of FETCH_DIM_R and FETCH_OBJ_R

* If HYBRID VM can't provide some stack space for JIT code in "red zone" then JIT has to reserve stack space itself

* Dump IR for stubs only if disassembling of stubs is requested

* Revert "Dump IR for stubs only if disassembling of stubs is requested"

This reverts commit d8b56bec129bc23c2b16f1f3c6367190181b6fdb.

* Dump IR for stubs only if disassembling of stubs is requested (another approach)

* Improve overflow deoptimization for ADD(_,1) and SUB(_,1)

Now we deoptimize to the next instruction, load constant result, and remove op1 from SNAPSHOT

* Switch to IR Builder API

* Switch to new IR builder macros

* Fix jit_set_Z_TYPE_INFO() call. op3 is a simple constant (not a ir_ref).

* Generate better code

* Enable empty ENTRY block merging

* Improve code generated for array separation/creation before an update

(ASSIGN_DIM, ASSING_DIM_OP, etc)

* Fix incorrect deleteion of PHI source (op1 is used for control link)

* Load constant once

* cleanup

* Improve control-flow to avoid two IS_ARRAY checks for REFERENCEs

* Update comments

* cleanup

* Clenup comments

* Fix AAarch 64 build (disable stack adjustment auto-detection)

* Add filename and line number to closure names

* Reserve stack for parameter passing

* Increase size of CPU stack reserved for JIT-ed code

* Fix addess sanitizer warnings

* Clenup: introduce OPTIMIZE_FOR_SIZE macro (disabled by default)

* Port 08e759120690520e99f9f2d38afeb21bcd1de197 to IR JIT

Fix (at lease part of the) #GH-10635: ARM64 function JIT causes impossible assertion

* cleanup

* Preload constant and use tests that may be compiled into better code

* Convert helpers to stubs

* Introduce a helper data structure (ir_refs) to collect references for the following use in (MERGE/PHI)_N

* Use ir_refs

* Improve code generated by zend_jit_zval_copy_deref()

* Use "cold" attribute to influence IR block scheduler and achieve better code layout

* Keep info collected by recursion analyzer

* Use HTTPS URL to allow fetching without a SSH key

* Update IR

* Update IR

* Add IR JIT support for Wondows (Win64 support is incomplete)

* Update IR

* Update IR

* Fix support for Windows ZTS build

* Fix stack alignment

* Cleanup ir_ctx.control usage

* Fixed support for irreducable (incomplete) and merged loops

* Revert "Fixed support for irreducable (incomplete) and merged loops"

This reverts commit 672b5b89f47e8b81745fb73c86e0bcb0937daf16.

* Generate better code for RECV_ENTRies

* Use simpler and more efficient checks

* Switch to new ENTRY node concept

* Limit register usage across the OSR ENTRY point

* Upate MEM type only if we write to memory

* Use LOOP_END without a reference edge

* Use new ir_init() prototype

* Delay LOAD for better LOAD fusion

* Fix RECV/RECV_INIT compilation with opcache.jit=1235

* iPtoperly compile fake closures (they mau be called as regular functions)

* Fix reabase

* Fix rebase and add --with-capstone support for IR JIT

* Replace zend_uchar -> uint8_t

* IR JIT support for delayed destructor for zend_assign_to_typed_ref/prop

* Handle zend_execute_internal in IR JIT

* Fix readonly+clone IR JIT issues

* Switch to ir_ctx.mflags

* Ckeanup "inputs_count" access

* Disable CSE for nodes bound to PHP local varibles

The stack slots for temporaty variables may be reused and in case of
spilling this may cause clobbering of the value.

(ext/standard/tests/strings/htmlentities20.phpt on x86 with tracing JIT)

* Fix deoptimization code when link traces

See ext/zlib/tests/bug75273.phpt failure

* Fix missing type store

This fixes ext/openssl/tests/openssl_error_string_basic_openssl3.phpt

* Fix tracing JIT for overflowing INC/DEC

Fixes tests/lang/operators/preinc_basiclong_64bit.phpt

* Remove ir_remove_unreachable_blocks() call. Now it's called by ir_build_cfg(), when necessary.

* IR JIT: Fixed inaccurate range inference usage for UNDEF/NULL/FALSE

* IR JIT: Fixed GH-11127 (JIT fault)

* Avoid allocation of unused exit point

* Don't record already stored PHP variables in SNAPSHOTs

* Delay variable load

* Disable CSE across ENTRY

* Fixed disabling CSE

* Fix deoptimization

* Fixed deoptimization

* Disable incorrect register allocation

* Fix JIT for INDENTICAL+JMPZ_EX

* Add comments

* Fixed missed type stores

* IR JIT: added support for CLDEMOTE

* Fixed incorrect constant usage

* Disable compilation of PHP functions with irreducible CGF

* Fixed liveness check

* Fixed code for constant conditional jump

* Add type store to avoid use-after-free

* Fixed liveness analyses

* Gnerate SNAPSHOT for virtual method calls

* More accurate search for staticaly inferred info about a trace SSA vaiable

* Fix incorrect result use type_info

* Fix JMPZ/NZ_EX support and missing type store

* Fixed trace type inference and missing type store

* Store type of unused CV to prevent possible following use after free

* Fixed deoptimizaton info

* Fixed stack layout

* Implemented support for veneers on AArch64

* Dsable CSE to avoid over-optimization

* Don't bind nodes for TMP PHP variables

* Re-enable CSE for temporary variables as we don't bind them anymore

* Switch to CPU stack spill slots

* Add codegen info dump

* Initialize CV variables through FP (this enables some folding optimizatios)

* Use zero-extension that can be eliminated

* Avoid generation of dead PHIs

* Increase preallocated spill stack size

* Enable IR based JIT by default

* Fixed build with -disable-opcache-jit

* Use explicit type conversion & force load values to registerts

* Fix IR build

* Checkout submodules in github actions

* Fixed Windows build

* Fixed Windows build

* Fixed reattach to IR JIT SHM

* Update IR

* Checkout submodules in nightly CI

* Fix MACOS ZTS in IR JIT

* Update ir

* Fixed incorrect register allocation

* Fixed incorect code generation

* Fixed tracing jit for BIND_INIT_STATIC_OR_JMP

* Update README

* Typos

* Revert JIT disabling for run-tests.php workers

* Fixed code review issues

* Update IR

* Update IR

* Update IR

* Allow exit_point duplication, when the deoptimization info differs because of spilling

* Use bound spill slots for CV (once again)

* Improve error handling

* Removed IR submodule

* Remove IR submodule from workflows

* Embed IR

IR commit: 8977307f4e96ee03847d7f2eb809b3080f9ed662

* Add .gitignore

* Fixed according to feedback

* Force C saving preserved registers only for HYBRID VM

* Update IR

IR commit: a2f8452b3d35a756cba38924f5c51a48a7207494

* cleanup

* Replace ZEND_ASSERT(0) by ZEND_UNREACHABLE()

* Update IR and remove unused IR files

IR commit: 399a38771393c202a741336643118991290b4b1b

* Fixed inconsistency between IR code-generation and register-allocation

* Update IR

IR commit: 86685504274b0c71d9985b3c926dccaca2cacf9b

* Update ir_PHI*() according to IR construction API changes

* Fixed 32-bit build

* Update IR

IR commit: d0686408e20cd8c8640e37ed52ab81403a2383cb

* Support for ir_TAILCALL() prototype changes

* Update IR

IR commit: d72ae866e09d17e879378767aceb91d51894818c

* Fixed incorrect extension (ZEXT->SEXT)

* Fix SSA dominance

* Update IR

IR commit: d60d92516dc5f89b93cdf1df7a54141e83226b07

* Fixed support ir_ctx.ret_type

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Zend/zend_types.h: deprecate zend_bool, zend_intptr_t, zend_uintptr_t (#10597)

These types are standard C99.

For compatibility with out-of-tree extensions, keep the typedefs
in

Zend/zend_types.h: deprecate zend_bool, zend_intptr_t, zend_uintptr_t (#10597)

These types are standard C99.

For compatibility with out-of-tree extensions, keep the typedefs
in main/php.h.

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Limit stack size (#9104)

Cleanup observer API and add JIT support

Add zend_observer API

Closes GH-5857.

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

Drop various unused macros/APIs

Also convert_libmagic_pattern() to return a zend_string*

Closes GH-6029

Revert "Revert "Merge branch 'PHP-7.4'""

This reverts commit 28e650a, which reverted commit 046dcfb, which had
to be reverted due to phpdbg issues. The culprit was that we did not
p

Revert "Revert "Merge branch 'PHP-7.4'""

This reverts commit 28e650a, which reverted commit 046dcfb, which had
to be reverted due to phpdbg issues. The culprit was that we did not
properly reset `zend_handler_table` to `NULL`, which is required for
SAPIs which may restart the engine after shutdown.

[1] <http://git.php.net/?p=php-src.git;a=commit;h=28e650abf8097a28789a005e5028fee095359583>
[2] <http://git.php.net/?p=php-src.git;a=commit;h=046dcfb531e242d36a7af2942b9b148290c3c7fe>

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Revert "Merge branch 'PHP-7.4'"

This reverts commit 046dcfb531e242d36a7af2942b9b148290c3c7fe, due to
segfaults on Travis. This needs to be investigated.

Make MSVCRT memory leak checking usable for the test suite

While basic support for MSVCRT debugging has been added long
ago[1], the leak checking is not usable for the test suite, becaus

Make MSVCRT memory leak checking usable for the test suite

While basic support for MSVCRT debugging has been added long
ago[1], the leak checking is not usable for the test suite, because we
are no longer calling `xmlCleanupParser()` on RSHUTDOWN of
ext/libxml[2], and therefore a few bogus leaks are reported whenever
ext/libxml is unloaded.

We therefore ignore memory leaks for this case. We introduce
`ZEND_IGNORE_LEAKS_BEGIN()` and `ZEND_IGNORE_LEAKS_END()` to keep
those ignores better readable, and also because these *might* be
useful for other leak checkers as well.

We also explicitly free the `zend_handlers_table` and the `p5s` to
avoid spurious leak reports.

[1] <http://git.php.net/?p=php-src.git;a=commit;h=d756e1db2324c1f4ab6f9b52e329959ce6a02bc3>
[2] <http://git.php.net/?p=php-src.git;a=commit;h=8742276eb3905eb97a585417000c7b8df85006d4>

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Disable "bad" optimisations only for emulation loop

Backported call frame initialization improvement

Sync leading and final newlines in source code files

This patch adds missing newlines, trims multiple redundant final
newlines into a single one, and trims redundant leading newlines.

Sync leading and final newlines in source code files

This patch adds missing newlines, trims multiple redundant final
newlines into a single one, and trims redundant leading newlines.

According to POSIX, a line is a sequence of zero or more non-' <newline>'
characters plus a terminating '<newline>' character. [1] Files should
normally have at least one final newline character.

C89 [2] and later standards [3] mention a final newline:
"A source file that is not empty shall end in a new-line character,
which shall not be immediately preceded by a backslash character."

Although it is not mandatory for all files to have a final newline
fixed, a more consistent and homogeneous approach brings less of commit
differences issues and a better development experience in certain text
editors and IDEs.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_206
[2] https://port70.net/~nsz/c/c89/c89-draft.html#2.1.1.2
[3] https://port70.net/~nsz/c/c99/n1256.html#5.1.1.2

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Added VM instrumentation ability

Use fastcall calling convention

Split zend_init_execute_data() into zend_init_func_execute_data() and zend_init_code_execute_data()

HYBRID VM cleanup

Implemented HYBRID VM instruction dispatch method that takes advantages of both CALL and GOTO VMs.

Fixed executor without global register variales (gcc warnings or clang errors)

Don't initialize EX(call)->symbol_table on each function call.
Keep it uninitialized, and check ZEND_CALL_HAS_SYMBOL_TABLE flag when necessary.

Reduced amount of code generated for interrupt handling.
Improved ZEND_VM_INTERRUPT_CHECK() placement (always perform checks after opcode handler completion, when instruction pointer value is alr

Reduced amount of code generated for interrupt handling.
Improved ZEND_VM_INTERRUPT_CHECK() placement (always perform checks after opcode handler completion, when instruction pointer value is alredy changed to the next opcode).

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Squashed commit of the following:

commit 98471821a89d7106de508fc544504ba674025abe
Author: Dmitry Stogov <dmitry@zend.com>
Date: Thu Mar 17 21:56:04 2016 +0300

Fixed wr

Squashed commit of the following:

commit 98471821a89d7106de508fc544504ba674025abe
Author: Dmitry Stogov <dmitry@zend.com>
Date: Thu Mar 17 21:56:04 2016 +0300

Fixed wrong constant usage

commit 8183b811e74c2989bcd8ab9d870fc3adbe973980
Author: Dmitry Stogov <dmitry@zend.com>
Date: Thu Mar 17 21:10:23 2016 +0300

Added ability to serialize and serialize opcode handlers for file-cache

commit 3516b261de7694bb1f34c5ae1adfb2f29dfab7bf
Author: Dmitry Stogov <dmitry@zend.com>
Date: Thu Mar 17 10:11:59 2016 +0300

Added missed file

commit f4475a23608623ccbf11b00c1c74df1db55dffa2
Author: Dmitry Stogov <dmitry@zend.com>
Date: Thu Mar 17 10:00:45 2016 +0300

Transparently introduce type-specialized opcode handlers.
This affects only PHP VM, and doesn't change anything else.

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Add extra VM operand specialization

For now RETVAL and OP_DATA= are supported

Fixed bug #69649 (segfault with --enable-dtrace)

Don't propogate "fake" EX(called_scope) and EX(This) into each internal function.
They need quite seldom and it's cheaper to get them from corresponfing upper stack frame.