mirror of
https://github.com/php/php-src.git
synced 2024-11-28 20:34:29 +08:00
418 lines
10 KiB
C
418 lines
10 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2000 Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 0.92 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available at through the world-wide-web at |
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| http://www.zend.com/license/0_92.txt. |
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| If you did not receive a copy of the Zend 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@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Andi Gutmans <andi@zend.com> |
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| Zeev Suraski <zeev@zend.com> |
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+----------------------------------------------------------------------+
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*/
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#include <stdio.h>
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#include "zend.h"
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#include "zend_alloc.h"
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#include "zend_compile.h"
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#include "zend_variables.h"
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#include "zend_operators.h"
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#include "zend_extensions.h"
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#include "zend_API.h"
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static void zend_extension_op_array_ctor_handler(zend_extension *extension, zend_op_array *op_array)
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{
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if (extension->op_array_ctor) {
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if (extension->resource_number>=0) {
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extension->op_array_ctor(&op_array->reserved[extension->resource_number]);
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} else {
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extension->op_array_ctor(NULL);
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}
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}
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}
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static void zend_extension_op_array_dtor_handler(zend_extension *extension, zend_op_array *op_array)
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{
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if (extension->op_array_dtor) {
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if (extension->resource_number>=0) {
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extension->op_array_dtor(&op_array->reserved[extension->resource_number]);
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} else {
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extension->op_array_dtor(NULL);
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}
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}
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}
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static void op_array_alloc_ops(zend_op_array *op_array)
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{
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op_array->opcodes = erealloc(op_array->opcodes, (op_array->size)*sizeof(zend_op));
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}
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void init_op_array(zend_op_array *op_array, int initial_ops_size)
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{
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op_array->type = ZEND_USER_FUNCTION;
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#if SUPPORT_INTERACTIVE
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{
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ELS_FETCH();
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op_array->start_op_number = op_array->end_op_number = op_array->last_executed_op_number = 0;
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op_array->backpatch_count = 0;
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if (EG(interactive)) {
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/* We must avoid a realloc() on the op_array in interactive mode, since pointers to constants
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* will become invalid
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*/
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initial_ops_size = 8192;
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}
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}
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#endif
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op_array->refcount = (int *) emalloc(sizeof(int));
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*op_array->refcount = 1;
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op_array->size = initial_ops_size;
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op_array->last = 0;
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op_array->opcodes = NULL;
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op_array_alloc_ops(op_array);
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op_array->T = 0;
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op_array->function_name = NULL;
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op_array->arg_types = NULL;
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op_array->brk_cont_array = NULL;
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op_array->last_brk_cont = 0;
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op_array->current_brk_cont = -1;
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op_array->static_variables = NULL;
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op_array->uses_globals = 0;
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op_array->return_reference = 0;
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zend_llist_apply_with_argument(&zend_extensions, (void (*)(void *, void *)) zend_extension_op_array_ctor_handler, op_array);
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}
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ZEND_API void destroy_zend_function(zend_function *function)
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{
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switch (function->type) {
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case ZEND_USER_FUNCTION:
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destroy_op_array((zend_op_array *) function);
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break;
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case ZEND_INTERNAL_FUNCTION:
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/* do nothing */
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break;
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}
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}
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ZEND_API void destroy_zend_class(zend_class_entry *ce)
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{
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if (--(*ce->refcount)>0) {
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return;
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}
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switch (ce->type) {
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case ZEND_USER_CLASS:
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efree(ce->name);
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efree(ce->refcount);
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zend_hash_destroy(&ce->function_table);
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zend_hash_destroy(&ce->default_properties);
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break;
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case ZEND_INTERNAL_CLASS:
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free(ce->name);
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free(ce->refcount);
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zend_hash_destroy(&ce->function_table);
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zend_hash_destroy(&ce->default_properties);
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break;
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}
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}
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void zend_class_add_ref(zend_class_entry *ce)
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{
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(*ce->refcount)++;
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}
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ZEND_API void destroy_op_array(zend_op_array *op_array)
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{
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zend_op *opline = op_array->opcodes;
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zend_op *end = op_array->opcodes+op_array->last;
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if (op_array->static_variables) {
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zend_hash_destroy(op_array->static_variables);
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FREE_HASHTABLE(op_array->static_variables);
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}
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if (--(*op_array->refcount)>0) {
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return;
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}
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efree(op_array->refcount);
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while (opline<end) {
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if (opline->op1.op_type==IS_CONST) {
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#if DEBUG_ZEND>2
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printf("Reducing refcount for %x 1=>0 (destroying)\n", &opline->op1.u.constant);
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#endif
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zval_dtor(&opline->op1.u.constant);
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}
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if (opline->op2.op_type==IS_CONST) {
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#if DEBUG_ZEND>2
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printf("Reducing refcount for %x 1=>0 (destroying)\n", &opline->op2.u.constant);
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#endif
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zval_dtor(&opline->op2.u.constant);
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}
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opline++;
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}
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efree(op_array->opcodes);
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if (op_array->function_name) {
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efree(op_array->function_name);
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}
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if (op_array->arg_types) {
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efree(op_array->arg_types);
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}
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if (op_array->brk_cont_array) {
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efree(op_array->brk_cont_array);
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}
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zend_llist_apply_with_argument(&zend_extensions, (void (*)(void *, void *)) zend_extension_op_array_dtor_handler, op_array);
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}
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void init_op(zend_op *op CLS_DC)
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{
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op->lineno = CG(zend_lineno);
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op->filename = zend_get_compiled_filename(CLS_C);
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op->result.op_type = IS_UNUSED;
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op->extended_value = 0;
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op->op1.u.EA.var = 0;
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op->op1.u.EA.type = 0;
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op->op2.u.EA.var = 0;
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op->op2.u.EA.type = 0;
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op->result.u.EA.var = 0;
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op->result.u.EA.type = 0;
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}
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zend_op *get_next_op(zend_op_array *op_array CLS_DC)
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{
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zend_uint next_op_num = op_array->last++;
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zend_op *next_op;
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if (next_op_num >= op_array->size) {
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#if SUPPORT_INTERACTIVE
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ELS_FETCH();
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if (EG(interactive)) {
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/* we messed up */
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zend_printf("Ran out of opcode space!\n"
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"You should probably consider writing this huge script into a file!\n");
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zend_bailout();
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}
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#endif
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op_array->size *= 2;
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op_array_alloc_ops(op_array);
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}
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next_op = &(op_array->opcodes[next_op_num]);
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init_op(next_op CLS_CC);
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return next_op;
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}
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int get_next_op_number(zend_op_array *op_array)
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{
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return op_array->last;
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}
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zend_brk_cont_element *get_next_brk_cont_element(zend_op_array *op_array)
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{
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op_array->last_brk_cont++;
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op_array->brk_cont_array = erealloc(op_array->brk_cont_array, sizeof(zend_brk_cont_element)*op_array->last_brk_cont);
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return &op_array->brk_cont_array[op_array->last_brk_cont-1];
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}
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static void zend_update_extended_info(zend_op_array *op_array CLS_DC)
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{
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zend_op *opline = op_array->opcodes, *end=opline+op_array->last;
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while (opline<end) {
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if (opline->opcode == ZEND_EXT_STMT) {
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if (opline+1<end) {
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if ((opline+1)->opcode == ZEND_EXT_STMT) {
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opline->opcode = ZEND_NOP;
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opline++;
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continue;
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}
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opline->lineno = (opline+1)->lineno;
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opline->filename = (opline+1)->filename;
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} else {
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opline->opcode = ZEND_NOP;
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}
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}
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opline++;
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}
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opline = get_next_op(op_array CLS_CC);
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opline->opcode = ZEND_EXT_STMT;
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opline->op1.op_type = IS_UNUSED;
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opline->op2.op_type = IS_UNUSED;
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if (op_array->last>0) {
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opline->filename = op_array->opcodes[op_array->last-2].filename;
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opline->lineno= op_array->opcodes[op_array->last-2].lineno;
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}
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}
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static void zend_extension_op_array_handler(zend_extension *extension, zend_op_array *op_array)
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{
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if (extension->op_array_handler) {
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extension->op_array_handler(op_array);
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}
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}
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int pass_two(zend_op_array *op_array)
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{
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CLS_FETCH();
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if (op_array->type!=ZEND_USER_FUNCTION && op_array->type!=ZEND_EVAL_CODE) {
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return 0;
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}
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if (CG(extended_info)) {
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zend_update_extended_info(op_array CLS_CC);
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}
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if (CG(handle_op_arrays)) {
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zend_llist_apply_with_argument(&zend_extensions, (void (*)(void *, void *)) zend_extension_op_array_handler, op_array);
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}
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return 0;
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}
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void pass_include_eval(zend_op_array *op_array)
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{
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zend_op *opline=op_array->opcodes, *end=opline+op_array->last;
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while (opline<end) {
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if (opline->op1.op_type==IS_CONST) {
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opline->op1.u.constant.is_ref = 1;
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opline->op1.u.constant.refcount = 2; /* Make sure is_ref won't be reset */
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}
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if (opline->op2.op_type==IS_CONST) {
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opline->op2.u.constant.is_ref = 1;
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opline->op2.u.constant.refcount = 2;
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}
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opline++;
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}
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}
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int print_class(zend_class_entry *class_entry)
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{
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printf("Class %s:\n", class_entry->name);
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zend_hash_apply(&class_entry->function_table, (int (*)(void *)) pass_two);
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printf("End of class %s.\n\n", class_entry->name);
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return 0;
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}
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ZEND_API unary_op_type get_unary_op(int opcode)
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{
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switch(opcode) {
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case ZEND_BW_NOT:
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return (unary_op_type) bitwise_not_function;
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break;
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case ZEND_BOOL_NOT:
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return (unary_op_type) boolean_not_function;
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break;
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default:
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return (unary_op_type) NULL;
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break;
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}
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}
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ZEND_API void *get_binary_op(int opcode)
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{
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switch (opcode) {
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case ZEND_ADD:
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case ZEND_ASSIGN_ADD:
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return (void *) add_function;
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break;
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case ZEND_SUB:
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case ZEND_ASSIGN_SUB:
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return (void *) sub_function;
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break;
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case ZEND_MUL:
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case ZEND_ASSIGN_MUL:
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return (void *) mul_function;
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break;
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case ZEND_DIV:
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case ZEND_ASSIGN_DIV:
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return (void *) div_function;
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break;
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case ZEND_MOD:
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case ZEND_ASSIGN_MOD:
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return (void *) mod_function;
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break;
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case ZEND_SL:
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case ZEND_ASSIGN_SL:
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return (void *) shift_left_function;
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break;
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case ZEND_SR:
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case ZEND_ASSIGN_SR:
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return (void *) shift_right_function;
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break;
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case ZEND_CONCAT:
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case ZEND_ASSIGN_CONCAT:
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return (void *) concat_function;
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break;
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case ZEND_IS_IDENTICAL:
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return (void *) is_identical_function;
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break;
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case ZEND_IS_EQUAL:
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return (void *) is_equal_function;
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break;
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case ZEND_IS_NOT_EQUAL:
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return (void *) is_not_equal_function;
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break;
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case ZEND_IS_SMALLER:
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return (void *) is_smaller_function;
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break;
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case ZEND_IS_SMALLER_OR_EQUAL:
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return (void *) is_smaller_or_equal_function;
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break;
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case ZEND_BW_OR:
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case ZEND_ASSIGN_BW_OR:
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return (void *) bitwise_or_function;
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break;
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case ZEND_BW_AND:
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case ZEND_ASSIGN_BW_AND:
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return (void *) bitwise_and_function;
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break;
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case ZEND_BW_XOR:
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case ZEND_ASSIGN_BW_XOR:
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return (void *) bitwise_xor_function;
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break;
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default:
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return (void *) NULL;
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break;
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}
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}
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