php-src/Zend
2023-07-07 18:03:07 +01:00
..
asm Merge branch 'PHP-8.2' 2023-02-05 16:47:09 +00:00
Optimizer Forward shutdown exceptions to user error handlers 2023-06-15 17:11:22 +02:00
tests Add stack limit check in zend_eval_const_expr() (#11424) 2023-07-07 14:18:15 +02:00
bench.php
LICENSE
Makefile.frag ext/Zend: zend_language_scanner_defs.h as make target 2023-02-17 16:37:13 +00:00
micro_bench.php
README.md [ci skip] Update README.md on ZE description 2022-02-08 10:38:33 +01:00
zend_alloc_sizes.h Fix GH-9361: Segmentation fault on script exit 2022-08-22 12:59:17 +02:00
zend_alloc.c Add zend_alloc XLEAK support 2023-04-03 12:55:26 +02:00
zend_alloc.h Revert "Zend/zend_types.h: move zend_result to separate header (#10609)" 2023-04-04 22:48:26 +03:00
zend_API.c Add number or str ZPP macros 2023-06-18 13:09:03 +01:00
zend_API.h Add number or str ZPP macros 2023-06-18 13:09:03 +01:00
zend_arena.h Revert GH-10279 2023-01-16 12:25:59 +01:00
zend_ast.c More usage of known zend_str instead of C string (#11381) 2023-06-08 13:03:29 +01:00
zend_ast.h Correctly handle multiple constants in typed declaration 2023-05-21 14:17:01 +01:00
zend_atomic.c Fixed undefined macros warnings 2022-09-22 13:17:02 +02:00
zend_atomic.h Fixed undefined macros warnings 2022-09-22 13:17:02 +02:00
zend_attributes_arginfo.h Revert "Merge branch 'PHP-8.2'" 2023-07-04 09:18:49 +02:00
zend_attributes.c RFC: Add #[Override] attribute (#9836) 2023-06-29 20:23:53 +02:00
zend_attributes.h RFC: Add #[Override] attribute (#9836) 2023-06-29 20:23:53 +02:00
zend_attributes.stub.php Add support for typed class constants in stubs 2023-07-01 11:50:04 +02:00
zend_bitset.h Add AVX2-accelerated UTF-16 decoding/encoding routines 2023-02-05 20:06:42 +02:00
zend_build.h Revert GH-10279 2023-01-16 12:25:59 +01:00
zend_builtin_functions_arginfo.h Revert "Merge branch 'PHP-8.2'" 2023-07-04 09:18:49 +02:00
zend_builtin_functions.c Revert "Revert "Remove name field from the zend_constant struct (#10954)"" 2023-07-04 16:42:40 +02:00
zend_builtin_functions.h Revert "Zend/zend_types.h: move zend_result to separate header (#10609)" 2023-04-04 22:48:26 +03:00
zend_builtin_functions.stub.php Add four extra fields to gc_status() (#9336) 2022-10-04 13:56:02 +01:00
zend_call_stack.c zend stack: prepare zend_call_stack_get implementation for OpenBSD. (#11578) 2023-07-07 18:03:07 +01:00
zend_call_stack.h Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_closures_arginfo.h
zend_closures.c Fix GH-11406: segfault with unpacking and magic method closure 2023-06-13 17:39:47 +02:00
zend_closures.h Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_closures.stub.php
zend_compile.c Add stack limit check in zend_eval_const_expr() (#11424) 2023-07-07 14:18:15 +02:00
zend_compile.h RFC: Add #[Override] attribute (#9836) 2023-06-29 20:23:53 +02:00
zend_config.w32.h
zend_constants_arginfo.h Declare remaining Zend constants in stubs (#9730) 2022-10-12 22:43:36 +02:00
zend_constants.c Revert "Revert "Remove name field from the zend_constant struct (#10954)"" 2023-07-04 16:42:40 +02:00
zend_constants.h Revert "Revert "Remove name field from the zend_constant struct (#10954)"" 2023-07-04 16:42:40 +02:00
zend_constants.stub.php Declare remaining Zend constants in stubs (#9730) 2022-10-12 22:43:36 +02:00
zend_cpuinfo.c Windows arm64 zend and standard extension support 2022-08-09 12:45:14 +02:00
zend_cpuinfo.h Cacheline demote to improve performance (#11101) 2023-05-15 10:28:43 +03:00
zend_default_classes.c
zend_dtrace.c
zend_dtrace.d
zend_dtrace.h
zend_enum_arginfo.h
zend_enum.c More usage of known zend_str instead of C string (#11381) 2023-06-08 13:03:29 +01:00
zend_enum.h zend_compiler, ...: use uint8_t instead of zend_uchar (#10621) 2023-02-23 14:56:54 +00:00
zend_enum.stub.php
zend_errors.h
zend_exceptions_arginfo.h Revert "Merge branch 'PHP-8.2'" 2023-07-04 09:18:49 +02:00
zend_exceptions.c Fix incorrect handling of unwind and graceful exit exceptions 2023-07-07 08:15:17 +02:00
zend_exceptions.h Revert "Zend/zend_types.h: move zend_result to separate header (#10609)" 2023-04-04 22:48:26 +03:00
zend_exceptions.stub.php Require zend_constants.stub.php from zend_exceptions.stubs.php 2022-07-12 10:35:03 +02:00
zend_execute_API.c Fix incorrect handling of unwind and graceful exit exceptions 2023-07-07 08:15:17 +02:00
zend_execute.c Revert "Revert "Remove name field from the zend_constant struct (#10954)"" 2023-07-04 16:42:40 +02:00
zend_execute.h Merge branch 'PHP-8.2' 2023-05-24 13:37:59 +02:00
zend_extensions.c Document zend_get_op_array_extension_handle 2023-03-30 17:45:34 -06:00
zend_extensions.h Revert "Zend/zend_types.h: move zend_result to separate header (#10609)" 2023-04-04 22:48:26 +03:00
zend_fibers_arginfo.h
zend_fibers.c Merge branch 'PHP-8.2' 2023-05-11 14:35:42 +02:00
zend_fibers.h Zend/zend_fibers: change return value to zend_result 2023-02-26 15:07:08 +00:00
zend_fibers.stub.php
zend_float.c Revert GH-10279 2023-01-16 12:25:59 +01:00
zend_float.h Revert GH-10279 2023-01-16 12:25:59 +01:00
zend_gc.c Fixes "GC_BENCH" is not defined in extensions including zend_gc.h 2023-06-22 17:40:15 +02:00
zend_gc.h Fixes "GC_BENCH" is not defined in extensions including zend_gc.h 2023-06-22 17:40:15 +02:00
zend_gdb.c Fix file descriptor check 2023-06-02 20:33:20 +01:00
zend_gdb.h
zend_generators_arginfo.h
zend_generators.c Merge branch 'PHP-8.2' 2023-04-15 18:34:13 +02:00
zend_generators.h zend_compiler, ...: use uint8_t instead of zend_uchar (#10621) 2023-02-23 14:56:54 +00:00
zend_generators.stub.php
zend_globals_macros.h Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_globals.h Shrink some commonly used structs by reordering members (#10880) 2023-03-22 19:26:42 +01:00
zend_hash.c Fix compilation for PHP 8.1 2023-05-10 23:59:53 +02:00
zend_hash.h Fix number of elements after packed hash filling (#11022) 2023-04-06 21:54:59 +02:00
zend_highlight.c
zend_highlight.h Revert "Zend/zend_types.h: move zend_result to separate header (#10609)" 2023-04-04 22:48:26 +03:00
zend_inheritance.c RFC: Add #[Override] attribute (#9836) 2023-06-29 20:23:53 +02:00
zend_inheritance.h RFC: Add #[Override] attribute (#9836) 2023-06-29 20:23:53 +02:00
zend_ini_parser.y Fix uninitialized memory in parse_ini_string() 2023-04-17 15:23:06 +02:00
zend_ini_scanner.h Zend/zend_ini_scanner: parse const strings 2023-01-04 12:49:48 +00:00
zend_ini_scanner.l Fix uninitialized memory in parse_ini_string() 2023-04-17 15:23:06 +02:00
zend_ini.c Merge branch 'PHP-8.2' 2023-02-21 13:54:12 +00:00
zend_ini.h Fix -Wenum-int-mismatch warnings on gcc 13 2023-04-20 16:04:59 +02:00
zend_interfaces_arginfo.h
zend_interfaces.c More usage of known zend_str instead of C string (#11381) 2023-06-08 13:03:29 +01:00
zend_interfaces.h Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_interfaces.stub.php
zend_istdiostream.h
zend_iterators.c Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_iterators.h Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_language_parser.y Correctly handle multiple constants in typed declaration 2023-05-21 14:17:01 +01:00
zend_language_scanner.h Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_language_scanner.l Fix GH-10634: Lexing memory corruption (#10866) 2023-03-17 17:09:14 +01:00
zend_list.c Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_list.h Fix -Wenum-int-mismatch warnings on gcc 13 2023-04-20 16:04:59 +02:00
zend_llist.c Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_llist.h Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_long.h Revert GH-10279 2023-01-16 12:25:59 +01:00
zend_map_ptr.h Revert GH-10279 2023-01-16 12:25:59 +01:00
zend_max_execution_timer.c fix: support for timeouts with ZTS on Linux (#10141) 2023-03-03 11:35:06 +01:00
zend_max_execution_timer.h fix: support for timeouts with ZTS on Linux (#10141) 2023-03-03 11:35:06 +01:00
zend_mmap.h Use PDEATHSIG to kill cli-server workers if parent exists 2022-09-08 10:48:20 +02:00
zend_modules.h Revert "Zend/zend_types.h: move zend_result to separate header (#10609)" 2023-04-04 22:48:26 +03:00
zend_multibyte.c Revert GH-10220 2023-01-16 12:27:33 +01:00
zend_multibyte.h Fix -Wenum-int-mismatch warnings on gcc 13 2023-04-20 16:04:59 +02:00
zend_multiply.h Revert GH-10279 2023-01-16 12:25:59 +01:00
zend_object_handlers.c Merge branch 'PHP-8.2' 2023-04-10 23:25:42 +03:00
zend_object_handlers.h zend_compiler, ...: use uint8_t instead of zend_uchar (#10621) 2023-02-23 14:56:54 +00:00
zend_objects_API.c Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_objects_API.h Zend/zend_types.h: deprecate zend_bool, zend_intptr_t, zend_uintptr_t (#10597) 2023-02-18 19:31:28 +00:00
zend_objects.c Allow readonly properties to be reinitialized once during cloning (#10389) 2023-02-28 22:54:38 +01:00
zend_objects.h Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_observer.c Fix add/remove observer API with multiple observers installed 2023-06-09 14:00:53 +02:00
zend_observer.h Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_opcode.c Allow arbitrary expressions in static variable initializer 2023-05-24 20:17:31 +02:00
zend_operators.c Fix GH-11507: String concatenation performance regression in 8.3 2023-06-22 23:42:25 +02:00
zend_operators.h Zend: Expose zendi_try_get_long() function via a public API (#10175) 2023-06-19 14:07:46 +01:00
zend_portability.h [Zend]: Fix unnecessary alignment in ZEND_CALL_FRAME_SLOT macro (#10988) 2023-04-04 12:09:38 +02:00
zend_ptr_stack.c Revert GH-10220 2023-01-16 12:27:33 +01:00
zend_ptr_stack.h Revert GH-10220 2023-01-16 12:27:33 +01:00
zend_range_check.h
zend_signal.c Fix -Wenum-int-mismatch warnings on gcc 13 2023-04-20 16:04:59 +02:00
zend_signal.h Revert GH-10220 2023-01-16 12:27:33 +01:00
zend_smart_str_public.h Revert GH-10220 2023-01-16 12:27:33 +01:00
zend_smart_str.c Revert GH-10220 2023-01-16 12:27:33 +01:00
zend_smart_str.h Revert GH-10220 2023-01-16 12:27:33 +01:00
zend_smart_string_public.h Revert GH-10220 2023-01-16 12:27:33 +01:00
zend_smart_string.h Revert GH-10220 2023-01-16 12:27:33 +01:00
zend_sort.c Revert "#include cleanup (#10216)" 2023-01-16 12:29:41 +01:00
zend_sort.h Revert "#include cleanup (#10216)" 2023-01-16 12:29:41 +01:00
zend_stack.c Two enums instead of preprocessor macros (#10617) 2023-02-21 15:34:33 +01:00
zend_stack.h Two enums instead of preprocessor macros (#10617) 2023-02-21 15:34:33 +01:00
zend_stream.c Revert GH-10279 2023-01-16 12:25:59 +01:00
zend_stream.h Revert "Zend/zend_types.h: move zend_result to separate header (#10609)" 2023-04-04 22:48:26 +03:00
zend_string.c Merge branch 'PHP-8.2' 2023-05-03 19:49:02 +02:00
zend_string.h Revert "Use binary safe case compare in new zend_string API" 2023-07-05 18:13:04 +01:00
zend_strtod_int.h build/php.m4: remove test for integer types (#10304) 2023-01-13 11:51:15 +00:00
zend_strtod.c Mark constant static arrays in function bodies actually as const (#10325) 2023-01-15 14:51:31 +00:00
zend_strtod.h
zend_system_id.c zend_compiler, ...: use uint8_t instead of zend_uchar (#10621) 2023-02-23 14:56:54 +00:00
zend_system_id.h Revert "Zend/zend_types.h: move zend_result to separate header (#10609)" 2023-04-04 22:48:26 +03:00
zend_type_info.h Convert iterable into an internal alias for Traversable|array (#7309) 2022-06-07 13:35:34 +01:00
zend_types.h Allow arbitrary expressions in static variable initializer 2023-05-24 20:17:31 +02:00
zend_variables.c Revert "Zend/zend_type_code: remove hard-coded integer values and" 2023-03-03 21:19:58 +00:00
zend_variables.h Revert GH-10220 2023-01-16 12:27:33 +01:00
zend_virtual_cwd.c Remove unnecessary memory clearing in virtual_file_ex() (#10963) 2023-04-12 21:28:53 +02:00
zend_virtual_cwd.h Cache d_type in directory entry 2023-07-07 18:02:32 +02:00
zend_vm_def.h Revert "Revert "Remove name field from the zend_constant struct (#10954)"" 2023-07-04 16:42:40 +02:00
zend_vm_execute.h Revert "Revert "Remove name field from the zend_constant struct (#10954)"" 2023-07-04 16:42:40 +02:00
zend_vm_execute.skl Zend/zend_types.h: deprecate zend_bool, zend_intptr_t, zend_uintptr_t (#10597) 2023-02-18 19:31:28 +00:00
zend_vm_gen.php zend_compiler, ...: use uint8_t instead of zend_uchar (#10621) 2023-02-23 14:56:54 +00:00
zend_vm_handlers.h Allow arbitrary expressions in static variable initializer 2023-05-24 20:17:31 +02:00
zend_vm_opcodes.c Allow arbitrary expressions in static variable initializer 2023-05-24 20:17:31 +02:00
zend_vm_opcodes.h Allow arbitrary expressions in static variable initializer 2023-05-24 20:17:31 +02:00
zend_vm_trace_handlers.h Use more compact representation for packed arrays. 2021-11-03 15:18:26 +03:00
zend_vm_trace_lines.h
zend_vm_trace_map.h Use more compact representation for packed arrays. 2021-11-03 15:18:26 +03:00
zend_vm.h Add function exposing HAVE_GCC_GLOBAL_REGS (#8359) 2022-06-08 12:32:30 +01:00
zend_weakrefs_arginfo.h
zend_weakrefs.c Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_weakrefs.h Revert GH-10300 2023-01-16 12:22:54 +01:00
zend_weakrefs.stub.php
zend.c Forward shutdown exceptions to user error handlers 2023-06-15 17:11:22 +02:00
zend.h PHP-8.2 is now for PHP 8.2.9-dev 2023-06-20 17:25:30 +03:00
Zend.m4 zend stack: prepare zend_call_stack_get implementation for OpenBSD. (#11578) 2023-07-07 18:03:07 +01:00

Zend Engine

Zend memory manager

General

The goal of the new memory manager (available since PHP 5.2) is to reduce memory allocation overhead and speedup memory management.

Debugging

Normal:

sapi/cli/php -r 'leak();'

Zend MM disabled:

USE_ZEND_ALLOC=0 valgrind --leak-check=full sapi/cli/php -r 'leak();'

Shared extensions

Since PHP 5.3.11 it is possible to prevent shared extensions from unloading so that valgrind can correctly track the memory leaks in shared extensions. For this there is the ZEND_DONT_UNLOAD_MODULES environment variable. If set, then DL_UNLOAD() is skipped during the shutdown of shared extensions.

ZEND_VM

ZEND_VM architecture allows specializing opcode handlers according to op_type fields and using different execution methods (call threading, switch threading and direct threading). As a result ZE2 got more than 20% speedup on raw PHP code execution (with specialized executor and direct threading execution method). As in most PHP applications raw execution speed isn't the limiting factor but system calls and database calls are, your mileage with this patch will vary.

Most parts of the old zend_execute.c go into zend_vm_def.h. Here you can find opcode handlers and helpers. The typical opcode handler template looks like this:

ZEND_VM_HANDLER(<OPCODE-NUMBER>, <OPCODE>, <OP1_TYPES>, <OP2_TYPES>)
{
    <HANDLER'S CODE>
}

<OPCODE-NUMBER> is a opcode number (0, 1, ...) <OPCODE> is an opcode name (ZEN_NOP, ZEND_ADD, :) <OP1_TYPES> and <OP2_TYPES> are masks for allowed operand op_types. Specializer will generate code only for defined combination of types. You can use any combination of the following op_types UNUSED, CONST, VAR, TMP and CV also you can use ANY mask to disable specialization according operand's op_type. <HANDLER'S CODE> is a handler's code itself. For most handlers it stills the same as in old zend_execute.c, but now it uses macros to access opcode operands and some internal executor data.

You can see the conformity of new macros to old code in the following list:

EXECUTE_DATA
    execute_data
ZEND_VM_DISPATCH_TO_HANDLER(<OP>)
    return <OP>_helper(ZEND_OPCODE_HANDLER_ARGS_PASSTHRU)
ZEND_VM_DISPATCH_TO_HELPER(<NAME>)
    return <NAME>(ZEND_OPCODE_HANDLER_ARGS_PASSTHRU)
ZEND_VM_DISPATCH_TO_HELPER_EX(<NAME>,<PARAM>,<VAL>)
    return <NAME>(<VAL>, ZEND_OPCODE_HANDLER_ARGS_PASSTHRU)
ZEND_VM_CONTINUE()
    return 0
ZEND_VM_NEXT_OPCODE()
    NEXT_OPCODE()
ZEND_VM_SET_OPCODE(<TARGET>
    SET_OPCODE(<TARGET>
ZEND_VM_INC_OPCODE()
    INC_OPCOD()
ZEND_VM_RETURN_FROM_EXECUTE_LOOP()
    RETURN_FROM_EXECUTE_LOOP()
ZEND_VM_C_LABEL(<LABEL>):
    <LABEL>:
ZEND_VM_C_GOTO(<LABEL>)
    goto <LABEL>
OP<X>_TYPE
    opline->op<X>.op_type
GET_OP<X>_ZVAL_PTR(<TYPE>)
    get_zval_ptr(&opline->op<X>, EX(Ts), &free_op<X>, <TYPE>)
GET_OP<X>_ZVAL_PTR_PTR(<TYPE>)
    get_zval_ptr_ptr(&opline->op<X>, EX(Ts), &free_op<X>, <TYPE>)
GET_OP<X>_OBJ_ZVAL_PTR(<TYPE>)
    get_obj_zval_ptr(&opline->op<X>, EX(Ts), &free_op<X>, <TYPE>)
GET_OP<X>_OBJ_ZVAL_PTR_PTR(<TYPE>)
    get_obj_zval_ptr_ptr(&opline->op<X>, EX(Ts), &free_op<X>, <TYPE>)
IS_OP<X>_TMP_FREE()
    IS_TMP_FREE(free_op<X>)
FREE_OP<X>()
    FREE_OP(free_op<X>)
FREE_OP<X>_IF_VAR()
    FREE_VAR(free_op<X>)
FREE_OP<X>_VAR_PTR()
    FREE_VAR_PTR(free_op<X>)

Executor's helpers can be defined without parameters or with one parameter. This is done with the following constructs:

ZEND_VM_HELPER(<HELPER-NAME>, <OP1_TYPES>, <OP2_TYPES>)
{
    <HELPER'S CODE>
}

ZEND_VM_HELPER_EX(<HELPER-NAME>, <OP1_TYPES>, <OP2_TYPES>, <PARAM_SPEC>)
{
    <HELPER'S CODE>
}

The executors code is generated by the PHP script zend_vm_gen.php. It uses zend_vm_def.h and zend_vm_execute.skl as input and produces zend_vm_opcodes.h and zend_vm_execute.h. The first file is a list of opcode definitions. It is included from zend_compile.h. The second one is an executor code itself. It is included from zend_execute.c.

zend_vm_gen.php can produce different kind of executors. You can select a different opcode threading model using --with-vm-kind=CALL|SWITCH|GOTO|HYBRID. You can disable opcode specialization using --without-specializer. At last you can debug the executor using the original zend_vm_def.h or the generated zend_vm_execute.h file. Debugging with the original file requires the --with-lines option. By default, Zend Engine uses the following command to generate the executor:

# Default VM kind is HYBRID
php zend_vm_gen.php --with-vm-kind=HYBRID