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164 lines
5.7 KiB
C
164 lines
5.7 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend OPcache |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2015 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Dmitry Stogov <dmitry@zend.com> |
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| Xinchen Hui <laruence@php.net> |
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+----------------------------------------------------------------------+
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*/
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/* pass 4
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* - optimize INIT_FCALL_BY_NAME to DO_FCALL
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*/
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#include "php.h"
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#include "Optimizer/zend_optimizer.h"
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#include "Optimizer/zend_optimizer_internal.h"
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#include "zend_API.h"
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#include "zend_constants.h"
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#include "zend_execute.h"
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#include "zend_vm.h"
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#define ZEND_OP2_IS_CONST_STRING(opline) \
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(ZEND_OP2_TYPE(opline) == IS_CONST && \
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Z_TYPE(op_array->literals[(opline)->op2.constant]) == IS_STRING)
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typedef struct _optimizer_call_info {
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zend_function *func;
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zend_op *opline;
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} optimizer_call_info;
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void optimize_func_calls(zend_op_array *op_array, zend_optimizer_ctx *ctx)
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{
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zend_op *opline = op_array->opcodes;
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zend_op *end = opline + op_array->last;
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int call = 0;
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void *checkpoint;
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optimizer_call_info *call_stack;
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if (op_array->last < 2) {
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return;
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}
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checkpoint = zend_arena_checkpoint(ctx->arena);
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call_stack = zend_arena_calloc(&ctx->arena, op_array->last / 2, sizeof(optimizer_call_info));
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while (opline < end) {
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switch (opline->opcode) {
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case ZEND_INIT_FCALL_BY_NAME:
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case ZEND_INIT_NS_FCALL_BY_NAME:
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if (ZEND_OP2_IS_CONST_STRING(opline)) {
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zend_function *func;
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zval *function_name = &op_array->literals[opline->op2.constant + 1];
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if ((func = zend_hash_find_ptr(&ctx->script->function_table,
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Z_STR_P(function_name))) != NULL) {
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call_stack[call].func = func;
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}
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}
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/* break missing intentionally */
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case ZEND_NEW:
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case ZEND_INIT_DYNAMIC_CALL:
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case ZEND_INIT_METHOD_CALL:
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case ZEND_INIT_STATIC_METHOD_CALL:
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case ZEND_INIT_FCALL:
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case ZEND_INIT_USER_CALL:
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call_stack[call].opline = opline;
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call++;
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break;
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case ZEND_DO_FCALL:
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call--;
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if (call_stack[call].func && call_stack[call].opline) {
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zend_op *fcall = call_stack[call].opline;
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if (fcall->opcode == ZEND_INIT_FCALL_BY_NAME) {
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fcall->opcode = ZEND_INIT_FCALL;
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fcall->op1.num = zend_vm_calc_used_stack(fcall->extended_value, call_stack[call].func);
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Z_CACHE_SLOT(op_array->literals[fcall->op2.constant + 1]) = Z_CACHE_SLOT(op_array->literals[fcall->op2.constant]);
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literal_dtor(&ZEND_OP2_LITERAL(fcall));
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fcall->op2.constant = fcall->op2.constant + 1;
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} else if (fcall->opcode == ZEND_INIT_NS_FCALL_BY_NAME) {
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fcall->opcode = ZEND_INIT_FCALL;
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fcall->op1.num = zend_vm_calc_used_stack(fcall->extended_value, call_stack[call].func);
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Z_CACHE_SLOT(op_array->literals[fcall->op2.constant + 1]) = Z_CACHE_SLOT(op_array->literals[fcall->op2.constant]);
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literal_dtor(&op_array->literals[fcall->op2.constant]);
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literal_dtor(&op_array->literals[fcall->op2.constant + 2]);
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fcall->op2.constant = fcall->op2.constant + 1;
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} else {
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ZEND_ASSERT(0);
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}
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}
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call_stack[call].func = NULL;
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call_stack[call].opline = NULL;
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break;
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case ZEND_FETCH_FUNC_ARG:
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case ZEND_FETCH_OBJ_FUNC_ARG:
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case ZEND_FETCH_DIM_FUNC_ARG:
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if (call_stack[call - 1].func) {
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if (ARG_SHOULD_BE_SENT_BY_REF(call_stack[call - 1].func, (opline->extended_value & ZEND_FETCH_ARG_MASK))) {
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opline->extended_value = 0;
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opline->opcode -= 9;
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} else {
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opline->extended_value = 0;
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opline->opcode -= 12;
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}
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}
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break;
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case ZEND_SEND_VAL_EX:
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if (call_stack[call - 1].func) {
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if (ARG_MUST_BE_SENT_BY_REF(call_stack[call - 1].func, opline->op2.num)) {
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/* We won't convert it into_DO_FCALL to emit error at run-time */
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call_stack[call - 1].opline = NULL;
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} else {
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opline->opcode = ZEND_SEND_VAL;
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}
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}
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break;
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case ZEND_SEND_VAR_EX:
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if (call_stack[call - 1].func) {
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if (ARG_SHOULD_BE_SENT_BY_REF(call_stack[call - 1].func, opline->op2.num)) {
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opline->opcode = ZEND_SEND_REF;
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} else {
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opline->opcode = ZEND_SEND_VAR;
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}
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}
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break;
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case ZEND_SEND_VAR_NO_REF:
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if (!(opline->extended_value & ZEND_ARG_COMPILE_TIME_BOUND) && call_stack[call - 1].func) {
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if (ARG_SHOULD_BE_SENT_BY_REF(call_stack[call - 1].func, opline->op2.num)) {
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opline->extended_value |= ZEND_ARG_COMPILE_TIME_BOUND | ZEND_ARG_SEND_BY_REF;
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} else {
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opline->opcode = ZEND_SEND_VAR;
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opline->extended_value = 0;
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}
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}
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break;
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#if 0
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case ZEND_SEND_REF:
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if (opline->extended_value != ZEND_ARG_COMPILE_TIME_BOUND && call_stack[call - 1].func) {
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/* We won't handle run-time pass by reference */
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call_stack[call - 1].opline = NULL;
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}
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break;
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#endif
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case ZEND_SEND_UNPACK:
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call_stack[call - 1].func = NULL;
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call_stack[call - 1].opline = NULL;
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break;
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default:
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break;
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}
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opline++;
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}
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zend_arena_release(&ctx->arena, checkpoint);
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}
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