mirror of
https://github.com/php/php-src.git
synced 2024-11-25 10:54:15 +08:00
404 lines
9.6 KiB
C
404 lines
9.6 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| Zend Engine |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) 1998-2001 Zend Technologies Ltd. (http://www.zend.com) |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 0.92 of the Zend license, |
|
|
| that is bundled with this package in the file LICENSE, and is |
|
|
| available at through the world-wide-web at |
|
|
| http://www.zend.com/license/0_92.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@zend.com> |
|
|
| Zeev Suraski <zeev@zend.com> |
|
|
+----------------------------------------------------------------------+
|
|
*/
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "zend.h"
|
|
#include "zend_alloc.h"
|
|
#include "zend_compile.h"
|
|
#include "zend_extensions.h"
|
|
#include "zend_API.h"
|
|
|
|
|
|
static void zend_extension_op_array_ctor_handler(zend_extension *extension, zend_op_array *op_array)
|
|
{
|
|
if (extension->op_array_ctor) {
|
|
extension->op_array_ctor(op_array);
|
|
}
|
|
}
|
|
|
|
|
|
static void zend_extension_op_array_dtor_handler(zend_extension *extension, zend_op_array *op_array)
|
|
{
|
|
if (extension->op_array_dtor) {
|
|
extension->op_array_dtor(op_array);
|
|
}
|
|
}
|
|
|
|
|
|
static void op_array_alloc_ops(zend_op_array *op_array)
|
|
{
|
|
op_array->opcodes = erealloc(op_array->opcodes, (op_array->size)*sizeof(zend_op));
|
|
}
|
|
|
|
|
|
|
|
void init_op_array(zend_op_array *op_array, int type, int initial_ops_size CLS_DC)
|
|
{
|
|
op_array->type = type;
|
|
#if SUPPORT_INTERACTIVE
|
|
{
|
|
ELS_FETCH();
|
|
|
|
op_array->start_op_number = op_array->end_op_number = op_array->last_executed_op_number = 0;
|
|
op_array->backpatch_count = 0;
|
|
if (EG(interactive)) {
|
|
/* We must avoid a realloc() on the op_array in interactive mode, since pointers to constants
|
|
* will become invalid
|
|
*/
|
|
initial_ops_size = 8192;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
op_array->refcount = (zend_uint *) emalloc(sizeof(zend_uint));
|
|
*op_array->refcount = 1;
|
|
op_array->size = initial_ops_size;
|
|
op_array->last = 0;
|
|
op_array->opcodes = NULL;
|
|
op_array_alloc_ops(op_array);
|
|
|
|
op_array->T = 0;
|
|
|
|
op_array->function_name = NULL;
|
|
op_array->filename = zend_get_compiled_filename(CLS_C);
|
|
|
|
op_array->arg_types = NULL;
|
|
|
|
op_array->brk_cont_array = NULL;
|
|
op_array->last_brk_cont = 0;
|
|
op_array->current_brk_cont = -1;
|
|
|
|
op_array->static_variables = NULL;
|
|
|
|
op_array->uses_globals = 0;
|
|
|
|
op_array->return_reference = 0;
|
|
op_array->done_pass_two = 0;
|
|
|
|
zend_llist_apply_with_argument(&zend_extensions, (void (*)(void *, void *)) zend_extension_op_array_ctor_handler, op_array);
|
|
}
|
|
|
|
|
|
ZEND_API void destroy_zend_function(zend_function *function)
|
|
{
|
|
switch (function->type) {
|
|
case ZEND_USER_FUNCTION:
|
|
destroy_op_array((zend_op_array *) function);
|
|
break;
|
|
case ZEND_INTERNAL_FUNCTION:
|
|
/* do nothing */
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
ZEND_API void destroy_zend_class(zend_class_entry *ce)
|
|
{
|
|
if (--(*ce->refcount)>0) {
|
|
return;
|
|
}
|
|
switch (ce->type) {
|
|
case ZEND_USER_CLASS:
|
|
efree(ce->name);
|
|
efree(ce->refcount);
|
|
zend_hash_destroy(&ce->function_table);
|
|
zend_hash_destroy(&ce->default_properties);
|
|
break;
|
|
case ZEND_INTERNAL_CLASS:
|
|
free(ce->name);
|
|
free(ce->refcount);
|
|
zend_hash_destroy(&ce->function_table);
|
|
zend_hash_destroy(&ce->default_properties);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
void zend_class_add_ref(zend_class_entry *ce)
|
|
{
|
|
(*ce->refcount)++;
|
|
}
|
|
|
|
|
|
ZEND_API void destroy_op_array(zend_op_array *op_array)
|
|
{
|
|
zend_op *opline = op_array->opcodes;
|
|
zend_op *end = op_array->opcodes+op_array->last;
|
|
|
|
if (op_array->static_variables) {
|
|
zend_hash_destroy(op_array->static_variables);
|
|
FREE_HASHTABLE(op_array->static_variables);
|
|
}
|
|
|
|
if (--(*op_array->refcount)>0) {
|
|
return;
|
|
}
|
|
|
|
efree(op_array->refcount);
|
|
|
|
while (opline<end) {
|
|
if (opline->op1.op_type==IS_CONST) {
|
|
#if DEBUG_ZEND>2
|
|
printf("Reducing refcount for %x 1=>0 (destroying)\n", &opline->op1.u.constant);
|
|
#endif
|
|
zval_dtor(&opline->op1.u.constant);
|
|
}
|
|
if (opline->op2.op_type==IS_CONST) {
|
|
#if DEBUG_ZEND>2
|
|
printf("Reducing refcount for %x 1=>0 (destroying)\n", &opline->op2.u.constant);
|
|
#endif
|
|
zval_dtor(&opline->op2.u.constant);
|
|
}
|
|
opline++;
|
|
}
|
|
efree(op_array->opcodes);
|
|
if (op_array->function_name) {
|
|
efree(op_array->function_name);
|
|
}
|
|
if (op_array->arg_types) {
|
|
efree(op_array->arg_types);
|
|
}
|
|
if (op_array->brk_cont_array) {
|
|
efree(op_array->brk_cont_array);
|
|
}
|
|
if (op_array->done_pass_two) {
|
|
zend_llist_apply_with_argument(&zend_extensions, (void (*)(void *, void *)) zend_extension_op_array_dtor_handler, op_array);
|
|
}
|
|
}
|
|
|
|
|
|
void init_op(zend_op *op CLS_DC)
|
|
{
|
|
memset(&op->result, 0, sizeof(znode));
|
|
op->lineno = CG(zend_lineno);
|
|
SET_UNUSED(op->result);
|
|
op->extended_value = 0;
|
|
memset(&op->op1, 0, sizeof(znode));
|
|
memset(&op->op2, 0, sizeof(znode));
|
|
}
|
|
|
|
zend_op *get_next_op(zend_op_array *op_array CLS_DC)
|
|
{
|
|
zend_uint next_op_num = op_array->last++;
|
|
zend_op *next_op;
|
|
|
|
if (next_op_num >= op_array->size) {
|
|
#if SUPPORT_INTERACTIVE
|
|
ELS_FETCH();
|
|
|
|
if (EG(interactive)) {
|
|
/* we messed up */
|
|
zend_printf("Ran out of opcode space!\n"
|
|
"You should probably consider writing this huge script into a file!\n");
|
|
zend_bailout();
|
|
}
|
|
#endif
|
|
op_array->size *= 4;
|
|
op_array_alloc_ops(op_array);
|
|
}
|
|
|
|
next_op = &(op_array->opcodes[next_op_num]);
|
|
|
|
init_op(next_op CLS_CC);
|
|
|
|
return next_op;
|
|
}
|
|
|
|
|
|
int get_next_op_number(zend_op_array *op_array)
|
|
{
|
|
return op_array->last;
|
|
}
|
|
|
|
|
|
|
|
|
|
zend_brk_cont_element *get_next_brk_cont_element(zend_op_array *op_array)
|
|
{
|
|
op_array->last_brk_cont++;
|
|
op_array->brk_cont_array = erealloc(op_array->brk_cont_array, sizeof(zend_brk_cont_element)*op_array->last_brk_cont);
|
|
return &op_array->brk_cont_array[op_array->last_brk_cont-1];
|
|
}
|
|
|
|
|
|
static void zend_update_extended_info(zend_op_array *op_array CLS_DC)
|
|
{
|
|
zend_op *opline = op_array->opcodes, *end=opline+op_array->last;
|
|
|
|
while (opline<end) {
|
|
if (opline->opcode == ZEND_EXT_STMT) {
|
|
if (opline+1<end) {
|
|
if ((opline+1)->opcode == ZEND_EXT_STMT) {
|
|
opline->opcode = ZEND_NOP;
|
|
opline++;
|
|
continue;
|
|
}
|
|
if (opline+1<end) {
|
|
opline->lineno = (opline+1)->lineno;
|
|
}
|
|
} else {
|
|
opline->opcode = ZEND_NOP;
|
|
}
|
|
}
|
|
opline++;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static void zend_extension_op_array_handler(zend_extension *extension, zend_op_array *op_array)
|
|
{
|
|
if (extension->op_array_handler) {
|
|
extension->op_array_handler(op_array);
|
|
}
|
|
}
|
|
|
|
|
|
int pass_two(zend_op_array *op_array)
|
|
{
|
|
zend_op *opline, *end;
|
|
CLS_FETCH();
|
|
|
|
if (op_array->type!=ZEND_USER_FUNCTION && op_array->type!=ZEND_EVAL_CODE) {
|
|
return 0;
|
|
}
|
|
if (CG(extended_info)) {
|
|
zend_update_extended_info(op_array CLS_CC);
|
|
}
|
|
if (CG(handle_op_arrays)) {
|
|
zend_llist_apply_with_argument(&zend_extensions, (void (*)(void *, void *)) zend_extension_op_array_handler, op_array);
|
|
}
|
|
|
|
opline = op_array->opcodes;
|
|
end = opline + op_array->last;
|
|
while (opline < end) {
|
|
if (opline->op1.op_type == IS_CONST) {
|
|
opline->op1.u.constant.is_ref = 1;
|
|
opline->op1.u.constant.refcount = 2; /* Make sure is_ref won't be reset */
|
|
}
|
|
if (opline->op2.op_type == IS_CONST) {
|
|
opline->op2.u.constant.is_ref = 1;
|
|
opline->op2.u.constant.refcount = 2;
|
|
}
|
|
opline++;
|
|
}
|
|
op_array->opcodes = (zend_op *) erealloc(op_array->opcodes, sizeof(zend_op)*op_array->last);
|
|
op_array->size = op_array->last;
|
|
op_array->done_pass_two = 1;
|
|
return 0;
|
|
}
|
|
|
|
|
|
int print_class(zend_class_entry *class_entry)
|
|
{
|
|
printf("Class %s:\n", class_entry->name);
|
|
zend_hash_apply(&class_entry->function_table, (int (*)(void *)) pass_two);
|
|
printf("End of class %s.\n\n", class_entry->name);
|
|
return 0;
|
|
}
|
|
|
|
ZEND_API unary_op_type get_unary_op(int opcode)
|
|
{
|
|
switch(opcode) {
|
|
case ZEND_BW_NOT:
|
|
return (unary_op_type) bitwise_not_function;
|
|
break;
|
|
case ZEND_BOOL_NOT:
|
|
return (unary_op_type) boolean_not_function;
|
|
break;
|
|
default:
|
|
return (unary_op_type) NULL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
ZEND_API void *get_binary_op(int opcode)
|
|
{
|
|
switch (opcode) {
|
|
case ZEND_ADD:
|
|
case ZEND_ASSIGN_ADD:
|
|
return (void *) add_function;
|
|
break;
|
|
case ZEND_SUB:
|
|
case ZEND_ASSIGN_SUB:
|
|
return (void *) sub_function;
|
|
break;
|
|
case ZEND_MUL:
|
|
case ZEND_ASSIGN_MUL:
|
|
return (void *) mul_function;
|
|
break;
|
|
case ZEND_DIV:
|
|
case ZEND_ASSIGN_DIV:
|
|
return (void *) div_function;
|
|
break;
|
|
case ZEND_MOD:
|
|
case ZEND_ASSIGN_MOD:
|
|
return (void *) mod_function;
|
|
break;
|
|
case ZEND_SL:
|
|
case ZEND_ASSIGN_SL:
|
|
return (void *) shift_left_function;
|
|
break;
|
|
case ZEND_SR:
|
|
case ZEND_ASSIGN_SR:
|
|
return (void *) shift_right_function;
|
|
break;
|
|
case ZEND_CONCAT:
|
|
case ZEND_ASSIGN_CONCAT:
|
|
return (void *) concat_function;
|
|
break;
|
|
case ZEND_IS_IDENTICAL:
|
|
return (void *) is_identical_function;
|
|
break;
|
|
case ZEND_IS_NOT_IDENTICAL:
|
|
return (void *) is_not_identical_function;
|
|
break;
|
|
case ZEND_IS_EQUAL:
|
|
return (void *) is_equal_function;
|
|
break;
|
|
case ZEND_IS_NOT_EQUAL:
|
|
return (void *) is_not_equal_function;
|
|
break;
|
|
case ZEND_IS_SMALLER:
|
|
return (void *) is_smaller_function;
|
|
break;
|
|
case ZEND_IS_SMALLER_OR_EQUAL:
|
|
return (void *) is_smaller_or_equal_function;
|
|
break;
|
|
case ZEND_BW_OR:
|
|
case ZEND_ASSIGN_BW_OR:
|
|
return (void *) bitwise_or_function;
|
|
break;
|
|
case ZEND_BW_AND:
|
|
case ZEND_ASSIGN_BW_AND:
|
|
return (void *) bitwise_and_function;
|
|
break;
|
|
case ZEND_BW_XOR:
|
|
case ZEND_ASSIGN_BW_XOR:
|
|
return (void *) bitwise_xor_function;
|
|
break;
|
|
default:
|
|
return (void *) NULL;
|
|
break;
|
|
}
|
|
}
|