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php-src/Zend/zend_vm_opcodes.c
Nikita Popov 47a2e5c785 Reference dynamic functions through dynamic_defs 
Currently, dynamically declared functions and closures are inserted
into the function table under a runtime definition key, and then later
possibly renamed. When opcache is not used and a file containing a
closure is repeatedly included, this leads to a very large memory leak,
as the no longer needed closure declarations will never be freed
(https://bugs.php.net/bug.php?id=76982).

With this patch, dynamic functions are instead stored in a
dynamic_func_defs member on the op_array, which opcodes reference
by index. When the parent op_array is destroyed, the dynamic_func_defs
it contains are also destroyed (unless they are stilled used elsewhere,
e.g. because they have been bound, or are used by a live closure). This
resolves the fundamental part of the leak, though doesn't completely
fix it yet due to some arena allocations.

The main non-obvious change here is to static variable handling:
We can't destroy static_variables_ptr in destroy_op_array, as e.g.
that would clear the static variables in a dynamic function when
the op_array containing it is destroyed. Static variable destruction
is separated out for this reason (we already do static variable
destruction separately for normal functions, so we only need to
handle main scripts).

Closes GH-5595.
2021-03-01 11:35:54 +01:00

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@php.net> |
| Zeev Suraski <zeev@php.net> |
| Dmitry Stogov <dmitry@php.net> |
+----------------------------------------------------------------------+
*/
#include <stdio.h>
#include <zend.h>
#include <zend_vm_opcodes.h>
static const char *zend_vm_opcodes_names[201] = {
"ZEND_NOP",
"ZEND_ADD",
"ZEND_SUB",
"ZEND_MUL",
"ZEND_DIV",
"ZEND_MOD",
"ZEND_SL",
"ZEND_SR",
"ZEND_CONCAT",
"ZEND_BW_OR",
"ZEND_BW_AND",
"ZEND_BW_XOR",
"ZEND_POW",
"ZEND_BW_NOT",
"ZEND_BOOL_NOT",
"ZEND_BOOL_XOR",
"ZEND_IS_IDENTICAL",
"ZEND_IS_NOT_IDENTICAL",
"ZEND_IS_EQUAL",
"ZEND_IS_NOT_EQUAL",
"ZEND_IS_SMALLER",
"ZEND_IS_SMALLER_OR_EQUAL",
"ZEND_ASSIGN",
"ZEND_ASSIGN_DIM",
"ZEND_ASSIGN_OBJ",
"ZEND_ASSIGN_STATIC_PROP",
"ZEND_ASSIGN_OP",
"ZEND_ASSIGN_DIM_OP",
"ZEND_ASSIGN_OBJ_OP",
"ZEND_ASSIGN_STATIC_PROP_OP",
"ZEND_ASSIGN_REF",
"ZEND_QM_ASSIGN",
"ZEND_ASSIGN_OBJ_REF",
"ZEND_ASSIGN_STATIC_PROP_REF",
"ZEND_PRE_INC",
"ZEND_PRE_DEC",
"ZEND_POST_INC",
"ZEND_POST_DEC",
"ZEND_PRE_INC_STATIC_PROP",
"ZEND_PRE_DEC_STATIC_PROP",
"ZEND_POST_INC_STATIC_PROP",
"ZEND_POST_DEC_STATIC_PROP",
"ZEND_JMP",
"ZEND_JMPZ",
"ZEND_JMPNZ",
"ZEND_JMPZNZ",
"ZEND_JMPZ_EX",
"ZEND_JMPNZ_EX",
"ZEND_CASE",
"ZEND_CHECK_VAR",
"ZEND_SEND_VAR_NO_REF_EX",
"ZEND_CAST",
"ZEND_BOOL",
"ZEND_FAST_CONCAT",
"ZEND_ROPE_INIT",
"ZEND_ROPE_ADD",
"ZEND_ROPE_END",
"ZEND_BEGIN_SILENCE",
"ZEND_END_SILENCE",
"ZEND_INIT_FCALL_BY_NAME",
"ZEND_DO_FCALL",
"ZEND_INIT_FCALL",
"ZEND_RETURN",
"ZEND_RECV",
"ZEND_RECV_INIT",
"ZEND_SEND_VAL",
"ZEND_SEND_VAR_EX",
"ZEND_SEND_REF",
"ZEND_NEW",
"ZEND_INIT_NS_FCALL_BY_NAME",
"ZEND_FREE",
"ZEND_INIT_ARRAY",
"ZEND_ADD_ARRAY_ELEMENT",
"ZEND_INCLUDE_OR_EVAL",
"ZEND_UNSET_VAR",
"ZEND_UNSET_DIM",
"ZEND_UNSET_OBJ",
"ZEND_FE_RESET_R",
"ZEND_FE_FETCH_R",
"ZEND_EXIT",
"ZEND_FETCH_R",
"ZEND_FETCH_DIM_R",
"ZEND_FETCH_OBJ_R",
"ZEND_FETCH_W",
"ZEND_FETCH_DIM_W",
"ZEND_FETCH_OBJ_W",
"ZEND_FETCH_RW",
"ZEND_FETCH_DIM_RW",
"ZEND_FETCH_OBJ_RW",
"ZEND_FETCH_IS",
"ZEND_FETCH_DIM_IS",
"ZEND_FETCH_OBJ_IS",
"ZEND_FETCH_FUNC_ARG",
"ZEND_FETCH_DIM_FUNC_ARG",
"ZEND_FETCH_OBJ_FUNC_ARG",
"ZEND_FETCH_UNSET",
"ZEND_FETCH_DIM_UNSET",
"ZEND_FETCH_OBJ_UNSET",
"ZEND_FETCH_LIST_R",
"ZEND_FETCH_CONSTANT",
"ZEND_CHECK_FUNC_ARG",
"ZEND_EXT_STMT",
"ZEND_EXT_FCALL_BEGIN",
"ZEND_EXT_FCALL_END",
"ZEND_EXT_NOP",
"ZEND_TICKS",
"ZEND_SEND_VAR_NO_REF",
"ZEND_CATCH",
"ZEND_THROW",
"ZEND_FETCH_CLASS",
"ZEND_CLONE",
"ZEND_RETURN_BY_REF",
"ZEND_INIT_METHOD_CALL",
"ZEND_INIT_STATIC_METHOD_CALL",
"ZEND_ISSET_ISEMPTY_VAR",
"ZEND_ISSET_ISEMPTY_DIM_OBJ",
"ZEND_SEND_VAL_EX",
"ZEND_SEND_VAR",
"ZEND_INIT_USER_CALL",
"ZEND_SEND_ARRAY",
"ZEND_SEND_USER",
"ZEND_STRLEN",
"ZEND_DEFINED",
"ZEND_TYPE_CHECK",
"ZEND_VERIFY_RETURN_TYPE",
"ZEND_FE_RESET_RW",
"ZEND_FE_FETCH_RW",
"ZEND_FE_FREE",
"ZEND_INIT_DYNAMIC_CALL",
"ZEND_DO_ICALL",
"ZEND_DO_UCALL",
"ZEND_DO_FCALL_BY_NAME",
"ZEND_PRE_INC_OBJ",
"ZEND_PRE_DEC_OBJ",
"ZEND_POST_INC_OBJ",
"ZEND_POST_DEC_OBJ",
"ZEND_ECHO",
"ZEND_OP_DATA",
"ZEND_INSTANCEOF",
"ZEND_GENERATOR_CREATE",
"ZEND_MAKE_REF",
"ZEND_DECLARE_FUNCTION",
"ZEND_DECLARE_LAMBDA_FUNCTION",
"ZEND_DECLARE_CONST",
"ZEND_DECLARE_CLASS",
"ZEND_DECLARE_CLASS_DELAYED",
"ZEND_DECLARE_ANON_CLASS",
"ZEND_ADD_ARRAY_UNPACK",
"ZEND_ISSET_ISEMPTY_PROP_OBJ",
"ZEND_HANDLE_EXCEPTION",
"ZEND_USER_OPCODE",
"ZEND_ASSERT_CHECK",
"ZEND_JMP_SET",
"ZEND_UNSET_CV",
"ZEND_ISSET_ISEMPTY_CV",
"ZEND_FETCH_LIST_W",
"ZEND_SEPARATE",
"ZEND_FETCH_CLASS_NAME",
"ZEND_CALL_TRAMPOLINE",
"ZEND_DISCARD_EXCEPTION",
"ZEND_YIELD",
"ZEND_GENERATOR_RETURN",
"ZEND_FAST_CALL",
"ZEND_FAST_RET",
"ZEND_RECV_VARIADIC",
"ZEND_SEND_UNPACK",
"ZEND_YIELD_FROM",
"ZEND_COPY_TMP",
"ZEND_BIND_GLOBAL",
"ZEND_COALESCE",
"ZEND_SPACESHIP",
"ZEND_FUNC_NUM_ARGS",
"ZEND_FUNC_GET_ARGS",
"ZEND_FETCH_STATIC_PROP_R",
"ZEND_FETCH_STATIC_PROP_W",
"ZEND_FETCH_STATIC_PROP_RW",
"ZEND_FETCH_STATIC_PROP_IS",
"ZEND_FETCH_STATIC_PROP_FUNC_ARG",
"ZEND_FETCH_STATIC_PROP_UNSET",
"ZEND_UNSET_STATIC_PROP",
"ZEND_ISSET_ISEMPTY_STATIC_PROP",
"ZEND_FETCH_CLASS_CONSTANT",
"ZEND_BIND_LEXICAL",
"ZEND_BIND_STATIC",
"ZEND_FETCH_THIS",
"ZEND_SEND_FUNC_ARG",
"ZEND_ISSET_ISEMPTY_THIS",
"ZEND_SWITCH_LONG",
"ZEND_SWITCH_STRING",
"ZEND_IN_ARRAY",
"ZEND_COUNT",
"ZEND_GET_CLASS",
"ZEND_GET_CALLED_CLASS",
"ZEND_GET_TYPE",
"ZEND_ARRAY_KEY_EXISTS",
"ZEND_MATCH",
"ZEND_CASE_STRICT",
"ZEND_MATCH_ERROR",
"ZEND_JMP_NULL",
"ZEND_CHECK_UNDEF_ARGS",
"ZEND_FETCH_GLOBALS",
};
static uint32_t zend_vm_opcodes_flags[201] = {
0x00000000,
0x00000b0b,
0x00000b0b,
0x80000b0b,
0x00000707,
0x00000b0b,
0x00000b0b,
0x00000b0b,
0x40000707,
0x80000b0b,
0x80000b0b,
0x80000b0b,
0x00000707,
0x0000000b,
0x00000007,
0x80000707,
0x80000303,
0x80000303,
0x80000707,
0x80000707,
0x00000b0b,
0x00000b0b,
0x00000301,
0x00006701,
0x00040751,
0x00040000,
0x04000701,
0x04006701,
0x04000751,
0x04000000,
0x0b000101,
0x00000003,
0x0b040751,
0x0b040000,
0x00000001,
0x00000001,
0x00000001,
0x00000001,
0x00040000,
0x00040000,
0x00040000,
0x00040000,
0x00000020,
0x00002007,
0x00002007,
0x03002007,
0x00002007,
0x00002007,
0x00000705,
0x00000101,
0x00001301,
0x07000003,
0x00000007,
0x00000707,
0x01000701,
0x01000701,
0x01000701,
0x00000000,
0x00000001,
0x01040300,
0x00000000,
0x01040310,
0x00000003,
0x00040110,
0x00040310,
0x00001307,
0x00001301,
0x00001301,
0x0100a173,
0x01040300,
0x00000005,
0x00186703,
0x00106703,
0x08000007,
0x00010107,
0x00000701,
0x00040751,
0x00002003,
0x03000001,
0x00000000,
0x00010107,
0x00000707,
0x00040757,
0x00010107,
0x00006701,
0x00640751,
0x00010107,
0x00006701,
0x00040751,
0x00010107,
0x00000707,
0x00040757,
0x00010107,
0x00006703,
0x00240753,
0x00010107,
0x00000701,
0x00040751,
0x0000070b,
0x00040391,
0x00001301,
0x00000000,
0x00000000,
0x00000000,
0x00000000,
0x01000000,
0x00001301,
0x02042003,
0x00000007,
0x00040771,
0x00000057,
0x0b000003,
0x01040757,
0x01048773,
0x00030107,
0x00020707,
0x00001303,
0x00001301,
0x01000703,
0x01000000,
0x00001003,
0x00000007,
0x00040003,
0x09000007,
0x0000a103,
0x00002003,
0x03000001,
0x00000005,
0x01000700,
0x00000000,
0x00000000,
0x00000000,
0x00040751,
0x00040751,
0x00040751,
0x00040751,
0x00000007,
0x00000000,
0x00047305,
0x00000000,
0x00000101,
0x00001000,
0x00001003,
0x00000303,
0x00000003,
0x00000303,
0x00040000,
0x00000000,
0x00060757,
0x00000000,
0x00000000,
0x00002000,
0x00002003,
0x00000101,
0x00020101,
0x00000701,
0x00000101,
0x00000075,
0x00000000,
0x00000000,
0x0b000703,
0x00000003,
0x00000020,
0x00003000,
0x00040110,
0x00000000,
0x00000007,
0x00000105,
0x00040301,
0x00002003,
0x00000707,
0x00000101,
0x00000103,
0x00047000,
0x00647000,
0x00047000,
0x00047000,
0x00247000,
0x00047000,
0x00040000,
0x00067000,
0x00040373,
0x00100101,
0x00100101,
0x00000101,
0x00001301,
0x00000101,
0x0300030b,
0x0300030b,
0x01000303,
0x00000107,
0x00000107,
0x00000101,
0x00000103,
0x00000707,
0x0300030b,
0x00000301,
0x0000010b,
0x0000200b,
0x00000101,
0x00000101,
};
ZEND_API const char* ZEND_FASTCALL zend_get_opcode_name(zend_uchar opcode) {
if (UNEXPECTED(opcode > ZEND_VM_LAST_OPCODE)) {
return NULL;
}
return zend_vm_opcodes_names[opcode];
}
ZEND_API uint32_t ZEND_FASTCALL zend_get_opcode_flags(zend_uchar opcode) {
if (UNEXPECTED(opcode > ZEND_VM_LAST_OPCODE)) {
opcode = ZEND_NOP;
}
return zend_vm_opcodes_flags[opcode];
}
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