php-src/Zend
Nikita Popov 6cc53981e5 Addref static vars when not copying private method
While we don't need to give this method separate static vars, we
do still need to perform an addref, as there will be a corresponding
delref in the dtor.
2019-08-29 14:47:09 +02:00
..
tests Addref static vars when not copying private method 2019-08-29 14:47:09 +02:00
bench.php Trim trailing whitespace in source code files 2018-10-13 14:17:28 +02:00
LICENSE Trim trailing whitespace in source code files 2018-10-13 14:17:28 +02:00
Makefile.frag Fixed bug #78102 2019-06-05 10:04:57 +02:00
micro_bench.php Trim trailing whitespace in source code files 2018-10-13 14:17:28 +02:00
README.md [ci skip] Join Zend engine docs-alike files to readme 2019-05-18 20:39:18 +02:00
zend_alloc_sizes.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_alloc.c Merge branch 'PHP-7.3' into PHP-7.4 2019-08-26 10:27:08 +02:00
zend_alloc.h Try to control ZEND_MM_ALIGNED_SIZE type 2019-06-12 13:17:25 +02:00
zend_API.c Fix arginfo leak when using disabled_classes 2019-08-23 17:00:59 +02:00
zend_API.h Add ZEND_DEP_ME macro 2019-07-11 17:09:03 +02:00
zend_arena.h Add tracked arena allocator 2019-06-28 12:44:18 +02:00
zend_ast.c Deprecate alternative array access syntax 2019-07-19 10:06:10 +02:00
zend_ast.h Implement arrow functions 2019-05-02 15:04:03 +02:00
zend_bitset.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_build.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_builtin_functions.c Don't skip uninitialized typed props in get_class_vars() 2019-07-24 10:52:01 +02:00
zend_builtin_functions.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_closures.c Relax closure $this unbinding deprecation 2019-08-23 17:21:23 +02:00
zend_closures.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_compile.c Relax closure $this unbinding deprecation 2019-08-23 17:21:23 +02:00
zend_compile.h Relax closure $this unbinding deprecation 2019-08-23 17:21:23 +02:00
zend_config.w32.h Remove legacy AC_CHECK_TYPE calls for uint and ulong 2019-03-06 22:49:16 +01:00
zend_constants.c Merge branch 'PHP-7.3' into PHP-7.4 2019-02-12 11:43:53 +01:00
zend_constants.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_cpuinfo.c Update and fix remaining year ranges (2019) 2019-02-08 23:14:29 +01:00
zend_cpuinfo.h Disable RTLD_DEEPBIND under memory sanitizer 2019-07-01 09:37:34 +02:00
zend_default_classes.c zend_weakrefs 2019-03-12 00:35:35 +01:00
zend_dtrace.c Remove local variables 2019-02-03 21:03:00 +01:00
zend_dtrace.d Take out some last remnants of the yearly copyright range 2019-01-30 11:48:30 +01:00
zend_dtrace.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_errors.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_exceptions.c simple ignore arguments in exceptions implementation 2019-07-02 13:18:39 +02:00
zend_exceptions.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_execute_API.c Add missed mutability check 2019-08-28 17:35:25 +02:00
zend_execute.c Inline zend_zval_ptr() in executor explicitely (only on hot paths) 2019-08-06 16:28:42 +03:00
zend_execute.h Cleanup 2019-06-21 11:43:17 +03:00
zend_extensions.c Remove local variables 2019-02-03 21:03:00 +01:00
zend_extensions.h Bump API numbers 2019-05-29 09:34:10 +01:00
zend_float.c Remove local variables 2019-02-03 21:03:00 +01:00
zend_float.h Fix typos in code comments in Zend/ [skip ci] 2019-02-18 17:56:28 +01:00
zend_gc.c Merge branch 'PHP-7.3' into PHP-7.4 2019-08-26 17:52:56 +02:00
zend_gc.h Set expectation to reduce hot code fragmentation 2019-07-10 18:29:35 +03:00
zend_generators.c Merge branch 'PHP-7.3' into PHP-7.4 2019-08-14 17:53:24 +02:00
zend_generators.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_globals_macros.h Implemented a faster way to access predefined TSRM resources - CG(), EG(), etc. 2019-03-14 03:01:01 +03:00
zend_globals.h Fixed bug #78396 2019-08-12 10:45:13 +02:00
zend_hash.c Assert that HT entries using add_new APIs are really new 2019-07-04 17:12:55 +02:00
zend_hash.h Add specialized pair construction API 2019-06-11 12:29:55 +02:00
zend_highlight.c Revert "Switch to bison location tracking" 2019-03-28 09:29:08 +01:00
zend_highlight.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_inheritance.c Addref static vars when not copying private method 2019-08-29 14:47:09 +02:00
zend_inheritance.h Avoid double checks on early binding 2019-06-27 02:13:06 +03:00
zend_ini_parser.y Use %define api.pure instead of %pure-parser 2019-06-12 09:26:34 +02:00
zend_ini_scanner.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_ini_scanner.l Revert "Rename *.l files to *.re" 2019-05-20 06:06:38 +02:00
zend_ini.c Remove local variables 2019-02-03 21:03:00 +01:00
zend_ini.h Mark "cold" functions 2019-05-29 11:48:41 +03:00
zend_interfaces.c Support full variance if autoloading is used 2019-06-11 13:09:33 +02:00
zend_interfaces.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_istdiostream.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_iterators.c Remove local variables 2019-02-03 21:03:00 +01:00
zend_iterators.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_language_parser.y Don't specify precedence for T_INC/T_DEC 2019-08-27 21:59:56 +02:00
zend_language_scanner.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_language_scanner.l Fix #78454: Consecutive numeric separators cause OOM error 2019-08-25 22:46:18 +02:00
zend_list.c Fix stream leak in phar cache_list 2019-06-25 14:28:58 +02:00
zend_list.h Fix stream leak in phar cache_list 2019-06-25 14:28:58 +02:00
zend_llist.c Remove local variables 2019-02-03 21:03:00 +01:00
zend_llist.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_long.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_map_ptr.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_modules.h Bump API numbers 2019-05-29 09:34:10 +01:00
zend_multibyte.c Remove local variables 2019-02-03 21:03:00 +01:00
zend_multibyte.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_multiply.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_object_handlers.c Merge branch 'PHP-7.3' into PHP-7.4 2019-08-08 10:07:39 +03:00
zend_object_handlers.h Fix typos in code comments in Zend/ [skip ci] 2019-02-18 17:56:28 +01:00
zend_objects_API.c Remove delref in free_object_storage 2019-08-28 17:04:36 +02:00
zend_objects_API.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_objects.c Merge branch 'PHP-7.3' into PHP-7.4 2019-08-13 09:54:44 +02:00
zend_objects.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_opcode.c Don't use needs_live_range hook for "special" live ranges 2019-08-26 16:12:03 +02:00
zend_operators.c Remove HAVE_STRCOLL check 2019-06-28 00:05:55 +02:00
zend_operators.h Remove HAVE_STRCOLL check 2019-06-28 00:05:55 +02:00
zend_portability.h Disable RTLD_DEEPBIND under memory sanitizer 2019-07-01 09:37:34 +02:00
zend_ptr_stack.c Remove local variables 2019-02-03 21:03:00 +01:00
zend_ptr_stack.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_range_check.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_signal.c Merge branch 'PHP-7.3' into PHP-7.4 2019-07-29 17:14:40 +02:00
zend_signal.h Remove HAVE_SIGNAL_H 2019-04-07 15:55:34 +02:00
zend_smart_str_public.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_smart_str.c Remove local variables 2019-02-03 21:03:00 +01:00
zend_smart_str.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_smart_string_public.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_smart_string.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_sort.c Remove local variables 2019-02-03 21:03:00 +01:00
zend_sort.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_stack.c Remove local variables 2019-02-03 21:03:00 +01:00
zend_stack.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_stream.c Fixed bug #78340 2019-07-29 10:07:12 +02:00
zend_stream.h Revert "Drop free_filename field from zend_file_handle" 2019-07-24 10:43:37 +02:00
zend_string.c Merge branch 'PHP-7.3' into PHP-7.4 2019-04-18 14:27:05 +03:00
zend_string.h Allow exceptions in __toString() 2019-06-05 14:25:07 +02:00
zend_strtod_int.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_strtod.c Suppress overflow UB in zend_strtod 2019-06-19 15:57:57 +02:00
zend_strtod.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_ts_hash.c Remove local variables 2019-02-03 21:03:00 +01:00
zend_ts_hash.h Fix typos in code comments in Zend/ [skip ci] 2019-02-18 17:56:28 +01:00
zend_type_info.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_types.h Generalize delref assertion 2019-08-13 11:44:54 +02:00
zend_variables.c Remove local variables 2019-02-03 21:03:00 +01:00
zend_variables.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_virtual_cwd.c Merge branch 'PHP-7.3' into PHP-7.4 2019-08-19 19:58:45 +02:00
zend_virtual_cwd.h Remove tsrm_config_common.h 2019-07-13 01:58:01 +02:00
zend_vm_def.h Merge branch 'PHP-7.3' into PHP-7.4 2019-08-29 12:34:07 +02:00
zend_vm_execute.h Merge branch 'PHP-7.3' into PHP-7.4 2019-08-29 12:34:07 +02:00
zend_vm_execute.skl Disable "bad" optimisations only for emulation loop 2019-05-30 20:35:30 +03:00
zend_vm_gen.php Try to fix macos build 2019-07-24 09:44:55 +02:00
zend_vm_handlers.h Avoid over-specialization 2019-07-24 19:51:56 +03:00
zend_vm_opcodes.c Avoid over-specialization 2019-07-24 19:51:56 +03:00
zend_vm_opcodes.h Replace ZEND_ASSIGN_ADD (and others) by ZEND_ASSIGN_OP, ZEND_ASSIGN_DIM_OP, ZEND_ASSGIN_OBJ_OP and ZEND_ASSIGN_STATIC_PROP_OP 2019-07-05 12:03:25 +03:00
zend_vm_trace_handlers.h Adios, yearly copyright ranges 2019-01-30 11:48:28 +01:00
zend_vm_trace_map.h Adios, yearly copyright ranges 2019-01-30 11:48:28 +01:00
zend_vm.h Remove local variables 2019-02-03 21:03:00 +01:00
zend_weakrefs.c Better hot/cold code splitting 2019-05-31 12:20:21 +03:00
zend_weakrefs.h Fix duplicate symbols _zend_ce_weakrefs 2019-03-13 11:38:21 +01:00
zend.c Set PROPERTY_TYPES_RESOLVED flag for internal classes 2019-07-04 10:32:36 +02:00
zend.h Next will be 7.3.10 2019-08-13 23:57:48 +02:00
Zend.m4 Simplify functions checks in m4 2019-07-17 03:50:47 +02:00

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>
}

Executor's code is generated by 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 different opcode threading model using --with-vm-kind=CALL|SWITCH|GOTO. You can disable opcode specialization using --without-specializer. You can include or exclude old executor together with specialized one using --without-old-executor. At last you can debug executor using original zend_vm_def.h or generated file zend_vm_execute.h. Debugging with original file requires --with-lines option. By default ZE2 uses the following command to generate executor:

php zend_vm_gen.php --with-vm-kind=CALL