php-src/Zend
Dmitry Stogov 464e725bb5 Fix typo (wrong string length)
Fixes oss-fuzz #44110
2022-01-28 11:04:51 +03:00
..
tests Fix array clobering by user error handler 2021-12-13 14:59:30 +03:00
bench.php Apply tidy formatting 2020-02-03 13:41:31 +01:00
LICENSE
Makefile.frag Clean up the generation of the parsers 2020-02-01 14:21:53 +01:00
micro_bench.php Apply tidy formatting 2020-02-03 13:41:31 +01:00
README.md
zend_alloc_sizes.h
zend_alloc.c Fix #81585: cached_chunks are not counted to real_size on shutdown 2021-12-10 12:24:06 +01:00
zend_alloc.h Merge branch 'PHP-7.4' into PHP-8.0 2021-05-31 15:24:00 +02:00
zend_API.c Add string return type to __toString() of internal classes 2021-11-09 10:17:26 +01:00
zend_API.h Avoid MSVC unused variable warning in FastZPP 2021-06-08 10:12:21 +02:00
zend_arena.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_ast.c Remove the duplicate line in zend_ast.c 2020-09-11 09:51:44 +02:00
zend_ast.h Change Attribute Syntax from @@ to #[] 2020-09-02 20:26:50 +02:00
zend_attributes_arginfo.h Implement Attribute Amendments. 2020-06-29 10:45:51 +02:00
zend_attributes.c Pass flags to #[Attribute] on internal attributes 2021-05-21 11:40:23 +02:00
zend_attributes.h Honor strict_types=1 for attributes, improve backtraces 2020-09-27 10:42:58 +02:00
zend_attributes.stub.php Implement Attribute Amendments. 2020-06-29 10:45:51 +02:00
zend_bitset.h decbin/decoct/dechex optimization. 2020-09-08 10:34:29 +03:00
zend_build.h
zend_builtin_functions_arginfo.h Remove some incorrect mixed parameter types 2020-11-21 23:17:35 +01:00
zend_builtin_functions.c Fix #77627 method_exists on Closure::__invoke 2021-05-25 11:22:05 +02:00
zend_builtin_functions.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_builtin_functions.stub.php Remove some incorrect mixed parameter types 2020-11-21 23:17:35 +01:00
zend_closures_arginfo.h Zend parameter renames amendment 2020-09-29 11:04:09 +02:00
zend_closures.c Merge branch 'PHP-7.4' into PHP-8.0 2021-11-16 12:46:20 +01:00
zend_closures.h Cleanup argument handling in ext/reflection 2020-07-24 17:47:42 +02:00
zend_closures.stub.php Zend parameter renames amendment 2020-09-29 11:04:09 +02:00
zend_compile.c Don't implement Stringable on traits 2021-11-05 09:42:58 +01:00
zend_compile.h Allow observer handlers disabling optimization in RETURN opcode handler, that may cause loss value of returned local variable. 2021-01-26 19:23:13 +03:00
zend_config.w32.h Drop duplicate definitions of zend_isnan and friends 2019-12-08 14:55:26 +01:00
zend_constants.c Make constant redeclaration a warning 2020-09-21 17:04:39 +02:00
zend_constants.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_cpuinfo.c Avoid void* arithmetic in sockets/multicast.c on NetBSD 2021-12-23 16:17:30 +01:00
zend_cpuinfo.h Don't mark cpu_supports functions as always inline 2020-12-01 10:22:36 +01:00
zend_default_classes.c Add Attributes 2020-06-04 18:19:49 +02:00
zend_dtrace.c Introduce error notification callbacks that are run independant of zend_error_cb 2020-07-17 15:08:11 +02:00
zend_dtrace.d
zend_dtrace.h Introduce error notification callbacks that are run independant of zend_error_cb 2020-07-17 15:08:11 +02:00
zend_errors.h Use clean shutdown on uncaught exception 2019-10-11 12:41:15 +02:00
zend_exceptions_arginfo.h Add missing classes to stubs 2021-02-09 22:38:06 +01:00
zend_exceptions.c Don't overwrite unwind exception 2021-09-08 11:04:12 +02:00
zend_exceptions.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_exceptions.stub.php Add missing classes to stubs 2021-02-09 22:38:06 +01:00
zend_execute_API.c Merge branch 'PHP-7.4' into PHP-8.0 2020-12-15 10:15:47 +01:00
zend_execute.c Combine ADDREF/DELREF 2021-12-13 22:38:23 +03:00
zend_execute.h Revert "Change calling convention of zval_update_constant[_ex]() to fastcall." 2020-10-09 15:06:12 +02:00
zend_extensions.c Check linker compatibility directly from HMODULE 2020-09-21 16:25:31 +02:00
zend_extensions.h Prepare for PHP 8.0 RC1 2020-09-30 00:19:10 +02:00
zend_float.c Revert "Fix #79595: zend_init_fpu() alters FPU precision" 2020-05-22 16:57:14 +02:00
zend_float.h Fix #79595: zend_init_fpu() alters FPU precision 2020-05-26 17:19:54 +02:00
zend_gc.c Make GC default threshold handling consistent 2020-10-23 10:30:07 +02:00
zend_gc.h EXTERN_C wrapping for GC buffer APIs 2020-12-10 17:15:19 +08:00
zend_gdb.c zend gdb detection fix on FreeBSD. 2021-12-21 07:19:33 +01:00
zend_gdb.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_generators_arginfo.h Add missing classes to stubs 2021-02-09 22:38:06 +01:00
zend_generators.c Merge branch 'PHP-7.4' into PHP-8.0 2020-11-18 12:46:12 +01:00
zend_generators.h Simplify and fix generator tree management 2020-10-22 10:25:25 +02:00
zend_generators.stub.php Add missing classes to stubs 2021-02-09 22:38:06 +01:00
zend_globals_macros.h
zend_globals.h Remove CG(filenames_table) 2020-09-03 11:33:54 +02:00
zend_hash.c Merge branch 'PHP-7.4' into PHP-8.0 2021-03-01 16:22:29 +01:00
zend_hash.h fix zend_hash_get_current_key_type_ex proto 2020-09-10 12:40:47 +02:00
zend_highlight.c
zend_highlight.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_inheritance.c Don't implement Stringable on traits 2021-11-05 09:42:58 +01:00
zend_inheritance.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_ini_parser.y Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_ini_scanner.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_ini_scanner.l Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_ini.c Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_ini.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_interfaces_arginfo.h Fix stub for Serializable::serialize() 2021-01-28 10:15:07 +01:00
zend_interfaces.c Handle ref return from Iterator::key() 2021-04-15 13:05:48 +02:00
zend_interfaces.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_interfaces.stub.php Fix stub for Serializable::serialize() 2021-01-28 10:15:07 +01:00
zend_istdiostream.h
zend_iterators.c Add get_gc handle for object iterators 2020-07-01 15:17:22 +02:00
zend_iterators.h Add get_gc handle for object iterators 2020-07-01 15:17:22 +02:00
zend_language_parser.y Change Attribute Syntax from @@ to #[] 2020-09-02 20:26:50 +02:00
zend_language_scanner.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_language_scanner.l Merge branch 'PHP-7.4' into PHP-8.0 2020-12-16 10:20:43 +01:00
zend_list.c Merge branch 'PHP-7.4' into PHP-8.0 2021-08-31 10:42:52 +02:00
zend_list.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_llist.c Fix MSVC level 1 (severe) warnings 2020-06-05 11:17:05 +02:00
zend_llist.h Fix MSVC level 1 (severe) warnings 2020-06-05 11:17:05 +02:00
zend_long.h Use supported printf format on Win64 2020-05-11 10:49:44 +02:00
zend_map_ptr.h Perform map ptr base arithmetic through uintptr_t 2020-01-28 11:24:04 +01:00
zend_modules.h Prepare for PHP 8.0 RC1 2020-09-30 00:19:10 +02:00
zend_multibyte.c Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_multibyte.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_multiply.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_object_handlers.c Merge branch 'PHP-7.4' into PHP-8.0 2021-07-15 09:32:26 +02:00
zend_object_handlers.h Fixed bug #80723 2021-02-16 12:33:50 +01:00
zend_objects_API.c Remove delref in free_object_storage 2019-08-28 17:04:36 +02:00
zend_objects_API.h Use ZEND_TYPE_IS_SET() when checking for property types 2019-09-23 16:53:54 +02:00
zend_objects.c Review the usage of apostrophes in error messages 2020-07-10 21:05:28 +02:00
zend_objects.h
zend_observer.c Revert "Fix zend_observer_fcall_end_all() accessing dangling pointers" 2021-12-27 21:08:51 +01:00
zend_observer.h Fire open observer end handlers after a zend_bailout 2020-11-16 15:12:57 -08:00
zend_opcode.c Fix COPY_TMP live range construction with optimization 2021-11-11 10:35:34 +01:00
zend_operators.c Fix typo (wrong string length) 2022-01-28 11:04:51 +03:00
zend_operators.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_portability.h Suppress unused label warnings in SWITCH VM 2021-11-04 14:50:54 +01:00
zend_ptr_stack.c
zend_ptr_stack.h
zend_range_check.h
zend_signal.c Merge branch 'PHP-7.4' into PHP-8.0 2020-12-15 10:15:47 +01:00
zend_signal.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_smart_str_public.h Remove mention of PHP major version in Copyright headers 2019-09-25 14:51:43 +02:00
zend_smart_str.c Merge branch 'PHP-7.4' into PHP-8.0 2021-09-16 16:29:51 +02:00
zend_smart_str.h Remove mention of PHP major version in Copyright headers 2019-09-25 14:51:43 +02:00
zend_smart_string_public.h Remove mention of PHP major version in Copyright headers 2019-09-25 14:51:43 +02:00
zend_smart_string.h Remove mention of PHP major version in Copyright headers 2019-09-25 14:51:43 +02:00
zend_sort.c Remove zend_qsort 2020-05-12 16:57:53 +02:00
zend_sort.h Remove zend_qsort 2020-05-12 16:57:53 +02:00
zend_stack.c Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_stack.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_stream.c Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_stream.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_string.c Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_string.h Merge branch 'PHP-7.4' into PHP-8.0 2021-11-29 19:15:20 +01:00
zend_strtod_int.h Drop unnecessary stdint and inttypes header checks 2020-04-22 20:18:19 +02:00
zend_strtod.c Add "const". Move constant strings to read-only memory. 2020-09-07 21:35:48 +03:00
zend_strtod.h
zend_system_id.c Add system ID entropy API 2020-09-18 14:26:44 -07:00
zend_system_id.h Add system ID entropy API 2020-09-18 14:26:44 -07:00
zend_ts_hash.c Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_ts_hash.h Fix incorrect/unused macro 2020-09-06 13:05:02 -04:00
zend_type_info.h Infer information about packed/hash arrays and use it for JIT 2020-08-25 18:28:23 +03:00
zend_types.h Fixed bug #80617: Type narrowing warning in ZEND_TYPE_INIT_CODE 2021-01-14 10:08:22 +01:00
zend_variables.c
zend_variables.h Drop various unused macros/APIs 2020-08-26 12:59:43 +02:00
zend_virtual_cwd.c Merge branch 'PHP-7.4' into PHP-8.0 2021-05-25 11:40:57 +02:00
zend_virtual_cwd.h Improve type declarations for Zend APIs 2020-08-28 15:41:27 +02:00
zend_vm_def.h Combine ADDREF/DELREF 2021-12-13 22:38:23 +03:00
zend_vm_execute.h Combine ADDREF/DELREF 2021-12-13 22:38:23 +03:00
zend_vm_execute.skl Cleanup observer API and add JIT support 2020-09-18 12:55:58 +03:00
zend_vm_gen.php Fix clobering of operand by error handler in assignment to string offset 2021-12-02 00:24:05 +03:00
zend_vm_handlers.h Fixed incorrect behavior of observer API. 2020-10-07 17:06:53 +03:00
zend_vm_opcodes.c Implement named parameters 2020-07-31 15:53:36 +02:00
zend_vm_opcodes.h Disable stack reuse optimization for x86 PIC code. It may clobber local variable used for Global Offset Table. 2020-12-01 15:20:06 +03:00
zend_vm_trace_handlers.h
zend_vm_trace_lines.h A helper to trace executed source lines 2020-06-10 00:13:39 +03:00
zend_vm_trace_map.h Fixed typecast 2020-05-22 12:36:52 +03:00
zend_vm.h
zend_weakrefs_arginfo.h Add more precise type info for stubs 2020-09-01 16:35:56 +02:00
zend_weakrefs.c Fix use after free when WeakMap is modified during field write 2021-11-20 16:52:25 -05:00
zend_weakrefs.h Add ZEND_API for weakmap functionality via zend_weakrefs_hash_add/del 2021-10-21 13:34:22 +02:00
zend_weakrefs.stub.php Add more precise type info for stubs 2020-09-01 16:35:56 +02:00
zend.c Fixed bug #80362: Running dtrace scripts can cause php to crash 2020-11-24 13:01:51 +01:00
zend.h Bump for 8.0.15 2021-12-02 05:09:07 +00:00
Zend.m4 Fixed bug #80377 2020-11-25 11:47:05 +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>
}

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