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zend_execute.c
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zend_execute.c
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998, 1999 Andi Gutmans, Zeev Suraski |
+----------------------------------------------------------------------+
| This source file is subject to version 0.91 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_91.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 |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <[email protected]> |
| Zeev Suraski <[email protected]> |
+----------------------------------------------------------------------+
*/
#include <stdio.h>
#include <signal.h>
#include "zend.h"
#include "zend_compile.h"
#include "zend_execute.h"
#include "zend_API.h"
#include "zend_ptr_stack.h"
#include "zend_variables.h"
#include "zend_operators.h"
#include "zend_constants.h"
#include "zend_extensions.h"
#if defined(HAVE_ALLOCA) && defined(HAVE_ALLOCA_H)
# include <alloca.h>
#endif
#define get_zval_ptr(node, Ts, should_free, type) _get_zval_ptr(node, Ts, should_free ELS_CC)
#define get_zval_ptr_ptr(node, Ts, type) _get_zval_ptr_ptr(node, Ts ELS_CC)
#define get_incdec_op(op, opcode) \
switch (opcode) { \
case ZEND_PRE_INC: \
case ZEND_POST_INC: \
(op) = increment_function; \
break; \
case ZEND_PRE_DEC: \
case ZEND_POST_DEC: \
(op) = decrement_function; \
break; \
default: \
(op) = NULL; \
break; \
} \
/* These globals don't have to be thread safe since they're never modified */
/* Prototypes */
static zval get_overloaded_property(ELS_D);
static void set_overloaded_property(zval *value ELS_DC);
static void call_overloaded_function(int arg_count, zval *return_value, HashTable *list, HashTable *plist ELS_DC);
static inline void zend_fetch_var_address(znode *result, znode *op1, znode *op2, temp_variable *Ts, int type ELS_DC);
static inline void zend_fetch_dimension_address(znode *result, znode *op1, znode *op2, temp_variable *Ts, int type ELS_DC);
static inline void zend_fetch_property_address(znode *result, znode *op1, znode *op2, temp_variable *Ts, int type ELS_DC);
static inline void zend_fetch_dimension_address_from_tmp_var(znode *result, znode *op1, znode *op2, temp_variable *Ts ELS_DC);
static void zend_extension_statement_handler(zend_extension *extension, zend_op_array *op_array);
static void zend_extension_fcall_begin_handler(zend_extension *extension, zend_op_array *op_array);
static void zend_extension_fcall_end_handler(zend_extension *extension, zend_op_array *op_array);
#define ARG_SHOULD_BE_SENT_BY_REF(offset) \
(function_being_called \
&& function_being_called->common.arg_types \
&& offset<=function_being_called->common.arg_types[0] \
&& function_being_called->common.arg_types[offset]==BYREF_FORCE)
static inline zval *_get_zval_ptr(znode *node, temp_variable *Ts, int *should_free ELS_DC)
{
switch(node->op_type) {
case IS_CONST:
*should_free = 0;
return &node->u.constant;
break;
case IS_TMP_VAR:
*should_free = 1;
return &Ts[node->u.var].tmp_var;
break;
case IS_VAR:
if (Ts[node->u.var].var.ptr) {
PZVAL_UNLOCK(Ts[node->u.var].var.ptr);
*should_free = 0;
return Ts[node->u.var].var.ptr;
} else {
*should_free = 1;
switch (Ts[node->u.var].EA.type) {
case IS_OVERLOADED_OBJECT:
Ts[node->u.var].tmp_var = get_overloaded_property(ELS_C);
Ts[node->u.var].tmp_var.refcount=1;
Ts[node->u.var].tmp_var.is_ref=1;
return &Ts[node->u.var].tmp_var;
break;
case IS_STRING_OFFSET: {
temp_variable *T = &Ts[node->u.var];
zval *str = T->EA.str;
if (T->EA.str->type != IS_STRING
|| (T->EA.str->value.str.len <= T->EA.offset)) {
T->tmp_var.value.str.val = empty_string;
T->tmp_var.value.str.len = 0;
} else {
char c = str->value.str.val[T->EA.offset];
T->tmp_var.value.str.val = estrndup(&c, 1);
T->tmp_var.value.str.len = 1;
}
zval_ptr_dtor(&str);
T->tmp_var.refcount=1;
T->tmp_var.is_ref=1;
T->tmp_var.type = IS_STRING;
return &T->tmp_var;
}
break;
}
}
break;
case IS_UNUSED:
*should_free = 0;
return NULL;
break;
#if DEBUG_ZEND
default:
zend_error(E_ERROR, "Unknown temporary variable type");
break;
#endif
}
return NULL;
}
static inline zval **_get_zval_ptr_ptr(znode *node, temp_variable *Ts ELS_DC)
{
switch(node->op_type) {
case IS_VAR:
if (Ts[node->u.var].var.ptr_ptr) {
PZVAL_UNLOCK(*Ts[node->u.var].var.ptr_ptr);
}
return Ts[node->u.var].var.ptr_ptr;
break;
default:
return NULL;
break;
}
}
static inline zval *_get_object_zval_ptr(znode *node, temp_variable *Ts, int *should_free, zval ***object_ptr_ptr ELS_DC)
{
switch(node->op_type) {
case IS_TMP_VAR:
*should_free = 1;
*object_ptr_ptr = NULL;
return &Ts[node->u.var].tmp_var;
break;
case IS_VAR:
if (Ts[node->u.var].var.ptr_ptr) {
PZVAL_UNLOCK(*Ts[node->u.var].var.ptr_ptr);
*should_free = 0;
*object_ptr_ptr = Ts[node->u.var].var.ptr_ptr;
return **object_ptr_ptr;
} else {
*should_free = 1;
*object_ptr_ptr = NULL;
return NULL;
}
break;
case IS_UNUSED:
*object_ptr_ptr = NULL;
return NULL;
break;
#if DEBUG_ZEND
default:
zend_error(E_ERROR, "Unknown temporary variable type");
break;
#endif
}
return NULL;
}
static inline zval **zend_fetch_property_address_inner(HashTable *ht, znode *op2, temp_variable *Ts, int type ELS_DC)
{
int free_op2;
zval *prop_ptr = get_zval_ptr(op2, Ts, &free_op2, BP_VAR_R);
zval **retval;
zval tmp;
switch (op2->op_type) {
case IS_CONST:
/* already a constant string */
break;
case IS_VAR:
tmp = *prop_ptr;
zval_copy_ctor(&tmp);
convert_to_string(&tmp);
prop_ptr = &tmp;
break;
case IS_TMP_VAR:
convert_to_string(prop_ptr);
break;
}
if (zend_hash_find(ht, prop_ptr->value.str.val, prop_ptr->value.str.len+1, (void **) &retval) == FAILURE) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE,"Undefined property: %s", prop_ptr->value.str.val);
/* break missing intentionally */
case BP_VAR_IS:
retval = &EG(uninitialized_zval_ptr);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined property: %s", prop_ptr->value.str.val);
/* break missing intentionally */
case BP_VAR_W: {
zval *new_zval = &EG(uninitialized_zval);
new_zval->refcount++;
zend_hash_update_ptr(ht, prop_ptr->value.str.val, prop_ptr->value.str.len+1, new_zval, sizeof(zval *), (void **) &retval);
}
break;
}
}
if (prop_ptr == &tmp) {
zval_dtor(prop_ptr);
}
FREE_OP(op2, free_op2);
return retval;
}
static inline void zend_assign_to_variable(znode *result, znode *op1, znode *op2, zval *value, int type, temp_variable *Ts ELS_DC)
{
zval **variable_ptr_ptr = get_zval_ptr_ptr(op1, Ts, BP_VAR_W);
zval *variable_ptr;
if (!variable_ptr_ptr) {
switch (Ts[op1->u.var].EA.type) {
case IS_OVERLOADED_OBJECT:
set_overloaded_property(value ELS_CC);
if (type == IS_TMP_VAR) {
zval_dtor(value);
}
break;
case IS_STRING_OFFSET: {
temp_variable *T = &Ts[op1->u.var];
if (T->EA.str->type == IS_STRING
&& (T->EA.offset < T->EA.str->value.str.len)) {
zval tmp;
zval *final_value = value;
if (value->type!=IS_STRING) {
tmp = *value;
if (op2 && op2->op_type == IS_VAR) {
zval_copy_ctor(&tmp);
}
convert_to_string(&tmp);
final_value = &tmp;
}
T->EA.str->value.str.val[T->EA.offset] = final_value->value.str.val[0];
if (op2
&& op2->op_type == IS_VAR
&& value==&Ts[op2->u.var].tmp_var) {
efree(value->value.str.val);
}
if (final_value == &tmp) {
zval_dtor(final_value);
}
/*
* the value of an assignment to a string offset is undefined
Ts[result->u.var].var = &T->EA.str;
*/
}
zval_ptr_dtor(&T->EA.str);
T->tmp_var.type = IS_STRING;
}
break;
}
Ts[result->u.var].var.ptr_ptr = &EG(uninitialized_zval_ptr);
SELECTIVE_PZVAL_LOCK(*Ts[result->u.var].var.ptr_ptr, result);
AI_USE_PTR(Ts[result->u.var].var);
return;
}
variable_ptr = *variable_ptr_ptr;
if (variable_ptr == EG(error_zval_ptr)) {
if (result) {
Ts[result->u.var].var.ptr_ptr = &EG(uninitialized_zval_ptr);
SELECTIVE_PZVAL_LOCK(*Ts[result->u.var].var.ptr_ptr, result);
AI_USE_PTR(Ts[result->u.var].var);
}
return;
}
if (PZVAL_IS_REF(variable_ptr)) {
if (variable_ptr!=value) {
short refcount=variable_ptr->refcount;
if (type!=IS_TMP_VAR) {
value->refcount++;
}
zendi_zval_dtor(*variable_ptr);
*variable_ptr = *value;
variable_ptr->refcount = refcount;
variable_ptr->is_ref = 1;
if (type!=IS_TMP_VAR) {
zendi_zval_copy_ctor(*variable_ptr);
zval_ptr_dtor(&value);
}
}
} else {
variable_ptr->refcount--;
if (variable_ptr->refcount==0) {
switch (type) {
case IS_VAR:
/*
if (PZVAL_IS_LOCKED(value)) {
zval *orig_value = value;
value = (zval *) emalloc(sizeof(zval));
*value = *orig_value;
value->refcount=0;
zval_copy_ctor(value);
}
*/
/* break missing intentionally */
case IS_CONST:
if (variable_ptr==value) {
variable_ptr->refcount++;
} else if (PZVAL_IS_REF(value)) {
zval tmp = *value;
tmp = *value;
zval_copy_ctor(&tmp);
tmp.refcount=1;
zendi_zval_dtor(*variable_ptr);
*variable_ptr = tmp;
} else {
value->refcount++;
zendi_zval_dtor(*variable_ptr);
safe_free_zval_ptr(variable_ptr);
*variable_ptr_ptr = value;
}
break;
case IS_TMP_VAR:
zendi_zval_dtor(*variable_ptr);
value->refcount=1;
*variable_ptr = *value;
break;
}
} else { /* we need to split */
switch (type) {
case IS_VAR:
/*
if (PZVAL_IS_LOCKED(value)) {
zval *orig_value = value;
value = (zval *) emalloc(sizeof(zval));
*value = *orig_value;
value->refcount=0;
zval_copy_ctor(value);
}
*/
/* break missing intentionally */
case IS_CONST:
if (PZVAL_IS_REF(value)) {
variable_ptr = *variable_ptr_ptr = (zval *) emalloc(sizeof(zval));
*variable_ptr = *value;
zval_copy_ctor(variable_ptr);
variable_ptr->refcount=1;
break;
}
*variable_ptr_ptr = value;
value->refcount++;
break;
case IS_TMP_VAR:
(*variable_ptr_ptr) = (zval *) emalloc(sizeof(zval));
value->refcount=1;
**variable_ptr_ptr = *value;
break;
}
}
(*variable_ptr_ptr)->is_ref=0;
}
if (result) {
Ts[result->u.var].var.ptr_ptr = variable_ptr_ptr;
SELECTIVE_PZVAL_LOCK(*variable_ptr_ptr, result);
AI_USE_PTR(Ts[result->u.var].var);
}
}
/* Utility Functions for Extensions */
static void zend_extension_statement_handler(zend_extension *extension, zend_op_array *op_array)
{
if (extension->statement_handler) {
extension->statement_handler(op_array);
}
}
static void zend_extension_fcall_begin_handler(zend_extension *extension, zend_op_array *op_array)
{
if (extension->fcall_begin_handler) {
extension->fcall_begin_handler(op_array);
}
}
static void zend_extension_fcall_end_handler(zend_extension *extension, zend_op_array *op_array)
{
if (extension->fcall_end_handler) {
extension->fcall_end_handler(op_array);
}
}
static void print_refcount(zval *p, char *str)
{
print_refcount(NULL, NULL);
}
static inline void zend_fetch_var_address(znode *result, znode *op1, znode *op2, temp_variable *Ts, int type ELS_DC)
{
int free_op1;
zval *varname = get_zval_ptr(op1, Ts, &free_op1, BP_VAR_R);
zval **retval;
zval tmp_varname;
HashTable *target_symbol_table;
switch (op2->u.fetch_type) {
case ZEND_FETCH_LOCAL:
default: /* just to shut gcc up */
target_symbol_table = EG(active_symbol_table);
break;
case ZEND_FETCH_GLOBAL:
if (op1->op_type == IS_VAR) {
PZVAL_LOCK(varname);
}
target_symbol_table = &EG(symbol_table);
break;
case ZEND_FETCH_STATIC:
if (!EG(active_op_array)->static_variables) {
EG(active_op_array)->static_variables = (HashTable *) emalloc(sizeof(HashTable));
zend_hash_init(EG(active_op_array)->static_variables, 2, NULL, PVAL_PTR_DTOR, 0);
}
target_symbol_table = EG(active_op_array)->static_variables;
break;
}
if (varname->type != IS_STRING) {
tmp_varname = *varname;
zval_copy_ctor(&tmp_varname);
convert_to_string(&tmp_varname);
varname = &tmp_varname;
}
if (zend_hash_find(target_symbol_table, varname->value.str.val, varname->value.str.len+1, (void **) &retval) == FAILURE) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE,"Undefined variable: %s", varname->value.str.val);
/* break missing intentionally */
case BP_VAR_IS:
retval = &EG(uninitialized_zval_ptr);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined variable: %s", varname->value.str.val);
/* break missing intentionally */
case BP_VAR_W: {
zval *new_zval = &EG(uninitialized_zval);
new_zval->refcount++;
zend_hash_update_ptr(target_symbol_table, varname->value.str.val, varname->value.str.len+1, new_zval, sizeof(zval *), (void **) &retval);
}
break;
}
}
if (op2->u.fetch_type == ZEND_FETCH_LOCAL) {
FREE_OP(op1, free_op1);
} else if (op2->u.fetch_type == ZEND_FETCH_STATIC) {
zval_update_constant(*retval);
}
if (varname == &tmp_varname) {
zval_dtor(varname);
}
Ts[result->u.var].var.ptr_ptr = retval;
SELECTIVE_PZVAL_LOCK(*retval, result);
}
static inline zval **zend_fetch_dimension_address_inner(HashTable *ht, znode *op2, temp_variable *Ts, int type ELS_DC)
{
int free_op2;
zval *dim = get_zval_ptr(op2, Ts, &free_op2, BP_VAR_R);
zval **retval;
switch (dim->type) {
case IS_STRING: {
if (zend_hash_find(ht, dim->value.str.val, dim->value.str.len+1, (void **) &retval) == FAILURE) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE,"Undefined index: %s", dim->value.str.val);
/* break missing intentionally */
case BP_VAR_IS:
retval = &EG(uninitialized_zval_ptr);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined index: %s", dim->value.str.val);
/* break missing intentionally */
case BP_VAR_W: {
zval *new_zval = &EG(uninitialized_zval);
new_zval->refcount++;
zend_hash_update_ptr(ht, dim->value.str.val, dim->value.str.len+1, new_zval, sizeof(zval *), (void **) &retval);
}
break;
}
}
}
break;
case IS_DOUBLE:
case IS_RESOURCE:
case IS_LONG: {
long index;
if (dim->type == IS_LONG || dim->type == IS_RESOURCE) {
index = dim->value.lval;
} else {
index = (long)dim->value.dval;
}
if (zend_hash_index_find(ht, index, (void **) &retval) == FAILURE) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE,"Undefined offset: %d", index);
/* break missing intentionally */
case BP_VAR_IS:
retval = &EG(uninitialized_zval_ptr);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined offset: %d", index);
/* break missing intentionally */
case BP_VAR_W: {
zval *new_zval = &EG(uninitialized_zval);
new_zval->refcount++;
zend_hash_index_update(ht, index, &new_zval, sizeof(zval *), (void **) &retval);
}
break;
}
}
}
break;
default:
zend_error(E_WARNING, "Illegal offset type");
if (type == BP_VAR_R || type == BP_VAR_IS) {
retval = &EG(uninitialized_zval_ptr);
} else {
retval = &EG(error_zval_ptr);
}
break;
}
FREE_OP(op2, free_op2);
return retval;
}
static inline void zend_fetch_dimension_address(znode *result, znode *op1, znode *op2, temp_variable *Ts, int type ELS_DC)
{
int free_op2;
zval **container_ptr = get_zval_ptr_ptr(op1, Ts, type);
zval *container;
zval ***retval = &Ts[result->u.var].var.ptr_ptr;
if (container_ptr == NULL) {
zend_property_reference *property_reference;
zend_overloaded_element overloaded_element;
if (Ts[op1->u.var].EA.type == IS_STRING_OFFSET) {
zval_ptr_dtor(&Ts[op1->u.var].EA.str);
switch (type) {
case BP_VAR_R:
case BP_VAR_IS:
*retval = &EG(uninitialized_zval_ptr);
break;
case BP_VAR_W:
case BP_VAR_RW:
*retval = &EG(error_zval_ptr);
break;
}
SELECTIVE_PZVAL_LOCK(**retval, result);
return;
}
/* prepare the new element */
overloaded_element.element = *get_zval_ptr(op2, Ts, &free_op2, type);
overloaded_element.type = IS_ARRAY;
if (!free_op2) {
zval_copy_ctor(&overloaded_element.element);
}
zend_stack_top(&EG(overloaded_objects_stack), (void **) &property_reference);
zend_llist_add_element(&property_reference->elements_list, &overloaded_element);
Ts[result->u.var].EA.type = IS_OVERLOADED_OBJECT;
*retval = NULL;
return;
}
container = *container_ptr;
if (container == EG(error_zval_ptr)) {
*retval = &EG(error_zval_ptr);
SELECTIVE_PZVAL_LOCK(**retval, result);
return;
}
if (container->type == IS_STRING && container->value.str.len==0) {
switch (type) {
case BP_VAR_RW:
case BP_VAR_W:
if (!PZVAL_IS_REF(container)) {
container->refcount--;
if (container->refcount>0) {
container = *container_ptr = (zval *) emalloc(sizeof(zval));
container->is_ref=0;
}
container->refcount=1;
}
array_init(container);
break;
}
}
switch (container->type) {
case IS_ARRAY:
if ((type==BP_VAR_W || type==BP_VAR_RW) && container->refcount>1 && !PZVAL_IS_REF(container)) {
container->refcount--;
*container_ptr = (zval *) emalloc(sizeof(zval));
**container_ptr = *container;
container = *container_ptr;
INIT_PZVAL(container);
zendi_zval_copy_ctor(*container);
}
if (op2->op_type == IS_UNUSED) {
zval *new_zval = &EG(uninitialized_zval);
new_zval->refcount++;
zend_hash_next_index_insert_ptr(container->value.ht, new_zval, sizeof(zval *), (void **) retval);
} else {
*retval = zend_fetch_dimension_address_inner(container->value.ht, op2, Ts, type ELS_CC);
}
SELECTIVE_PZVAL_LOCK(**retval, result);
break;
case IS_STRING: {
zval *offset;
offset = get_zval_ptr(op2, Ts, &free_op2, BP_VAR_R);
if (container->value.str.val == undefined_variable_string) {
/* for read-mode only */
*retval = &EG(uninitialized_zval_ptr);
SELECTIVE_PZVAL_LOCK(**retval, result);
FREE_OP(op2, free_op2);
} else {
zval tmp;
if (offset->type != IS_LONG) {
tmp = *offset;
zval_copy_ctor(&tmp);
convert_to_long(&tmp);
offset = &tmp;
}
Ts[result->u.var].EA.str = container;
container->refcount++;
Ts[result->u.var].EA.offset = offset->value.lval;
Ts[result->u.var].EA.type = IS_STRING_OFFSET;
FREE_OP(op2, free_op2);
*retval = NULL;
return;
}
}
break;
default: {
zval *offset;
offset = get_zval_ptr(op2, Ts, &free_op2, BP_VAR_R);
if (type==BP_VAR_R || type==BP_VAR_IS) {
*retval = &EG(uninitialized_zval_ptr);
} else {
*retval = &EG(error_zval_ptr);
}
FREE_OP(op2, free_op2);
SELECTIVE_PZVAL_LOCK(**retval, result);
}
break;
}
}
static inline void zend_fetch_dimension_address_from_tmp_var(znode *result, znode *op1, znode *op2, temp_variable *Ts ELS_DC)
{
int free_op1;
zval *container = get_zval_ptr(op1, Ts, &free_op1, BP_VAR_R);
if (container->type != IS_ARRAY) {
Ts[result->u.var].var.ptr_ptr = &EG(uninitialized_zval_ptr);
SELECTIVE_PZVAL_LOCK(*Ts[result->u.var].var.ptr_ptr, result);
return;
}
Ts[result->u.var].var.ptr_ptr = zend_fetch_dimension_address_inner(container->value.ht, op2, Ts, BP_VAR_R ELS_CC);
SELECTIVE_PZVAL_LOCK(*Ts[result->u.var].var.ptr_ptr, result);
}
static inline void zend_fetch_property_address(znode *result, znode *op1, znode *op2, temp_variable *Ts, int type ELS_DC)
{
int free_op2;
zval **container_ptr = get_zval_ptr_ptr(op1, Ts, type);
zval *container;
zval ***retval = &Ts[result->u.var].var.ptr_ptr;
if (container_ptr == NULL) {
zend_property_reference *property_reference;
zend_overloaded_element overloaded_element;
if (Ts[op1->u.var].EA.type == IS_STRING_OFFSET) {
zval_ptr_dtor(&Ts[op1->u.var].EA.str);
switch (type) {
case BP_VAR_R:
case BP_VAR_IS:
*retval = &EG(uninitialized_zval_ptr);
break;
case BP_VAR_W:
case BP_VAR_RW:
*retval = &EG(error_zval_ptr);
break;
}
SELECTIVE_PZVAL_LOCK(**retval, result);
return;
}
overloaded_element.element = *get_zval_ptr(op2, Ts, &free_op2, type);
overloaded_element.type = IS_OBJECT;
if (!free_op2) {
zval_copy_ctor(&overloaded_element.element);
}
zend_stack_top(&EG(overloaded_objects_stack), (void **) &property_reference);
zend_llist_add_element(&property_reference->elements_list, &overloaded_element);
Ts[result->u.var].EA.type = IS_OVERLOADED_OBJECT;
*retval = NULL;
return;
}
container = *container_ptr;
if (container == EG(error_zval_ptr)) {
*retval = &EG(error_zval_ptr);
SELECTIVE_PZVAL_LOCK(**retval, result);
return;
}
if (container->type == IS_OBJECT
&& container->value.obj.ce->handle_property_get) {
zend_property_reference property_reference;
zend_overloaded_element overloaded_element;
property_reference.object = container;
property_reference.type = type;
zend_llist_init(&property_reference.elements_list, sizeof(zend_overloaded_element), NULL, 0);
overloaded_element.element = *get_zval_ptr(op2, Ts, &free_op2, type);
overloaded_element.type = IS_OBJECT;
if (!free_op2) {
zval_copy_ctor(&overloaded_element.element);
}
zend_llist_add_element(&property_reference.elements_list, &overloaded_element);
zend_stack_push(&EG(overloaded_objects_stack), &property_reference, sizeof(zend_property_reference));
Ts[result->u.var].EA.type = IS_OVERLOADED_OBJECT;
*retval = NULL;
return;
}
if (container->type == IS_STRING && container->value.str.len==0) {
switch (type) {
case BP_VAR_RW:
case BP_VAR_W:
if (!PZVAL_IS_REF(container)) {
container->refcount--;
if (container->refcount>0) {
container = *container_ptr = (zval *) emalloc(sizeof(zval));
container->is_ref=0;
}
container->refcount=1;
}
object_init(container);
break;
}
}
if (container->type != IS_OBJECT) {
zval *offset;
offset = get_zval_ptr(op2, Ts, &free_op2, BP_VAR_R);
FREE_OP(op2, free_op2);
if (type==BP_VAR_R || type==BP_VAR_IS) {
*retval = &EG(uninitialized_zval_ptr);
} else {
*retval = &EG(error_zval_ptr);
}
SELECTIVE_PZVAL_LOCK(**retval, result);
return;
}
if ((type==BP_VAR_W || type==BP_VAR_RW) && container->refcount>1 && !PZVAL_IS_REF(container)) {
container->refcount--;
*container_ptr = (zval *) emalloc(sizeof(zval));
**container_ptr = *container;
container = *container_ptr;
INIT_PZVAL(container);
zendi_zval_copy_ctor(*container);
}
*retval = zend_fetch_property_address_inner(container->value.obj.properties, op2, Ts, type ELS_CC);
SELECTIVE_PZVAL_LOCK(**retval, result);
}
static zval get_overloaded_property(ELS_D)
{
zend_property_reference *property_reference;
zval result;
zend_stack_top(&EG(overloaded_objects_stack), (void **) &property_reference);
result = (property_reference->object)->value.obj.ce->handle_property_get(property_reference);
zend_llist_destroy(&property_reference->elements_list);
zend_stack_del_top(&EG(overloaded_objects_stack));
return result;
}
static void set_overloaded_property(zval *value ELS_DC)
{
zend_property_reference *property_reference;
zend_stack_top(&EG(overloaded_objects_stack), (void **) &property_reference);
(property_reference->object)->value.obj.ce->handle_property_set(property_reference, value);
zend_llist_destroy(&property_reference->elements_list);
zend_stack_del_top(&EG(overloaded_objects_stack));
}
static void call_overloaded_function(int arg_count, zval *return_value, HashTable *list, HashTable *plist ELS_DC)
{
zend_property_reference *property_reference;
zend_stack_top(&EG(overloaded_objects_stack), (void **) &property_reference);
(property_reference->object)->value.obj.ce->handle_function_call(arg_count, return_value, list, plist, property_reference->object, property_reference);
zend_llist_destroy(&property_reference->elements_list);
zend_stack_del_top(&EG(overloaded_objects_stack));
}
#if (HAVE_ALLOCA || (defined (__GNUC__) && __GNUC__ >= 2)) && !(defined(ZTS) && (WINNT|WIN32))
# define do_alloca(p) alloca(p)
# define free_alloca(p)
#else
# define do_alloca(p) emalloc(p)
# define free_alloca(p) efree(p)
#endif
typedef struct _object_info {
zval *ptr;
zval **ptr_ptr;
} object_info;
void execute(zend_op_array *op_array ELS_DC)
{
zend_op *opline = op_array->opcodes;
zend_op *end = op_array->opcodes + op_array->last;
zend_function_state function_state;
zend_function *function_being_called=NULL;
object_info object = {NULL, NULL};
#if !defined (__GNUC__) || __GNUC__ < 2
temp_variable *Ts = (temp_variable *) do_alloca(sizeof(temp_variable)*op_array->T);
#else
temp_variable Ts[op_array->T];
#endif
#if SUPPORT_INTERACTIVE
if (EG(interactive)) {
opline = op_array->opcodes + op_array->start_op_number;
end = op_array->opcodes + op_array->end_op_number;
}
#endif
EG(opline_ptr) = &opline;
function_state.function = (zend_function *) op_array;
EG(function_state_ptr) = &function_state;
#if ZEND_DEBUG
/* function_state.function_symbol_table is saved as-is to a stack,
* which is an intentional UMR. Shut it up if we're in DEBUG.
*/
function_state.function_symbol_table = NULL;
#endif
if (op_array->uses_globals) {
zval *globals = (zval *) emalloc(sizeof(zval));
globals->refcount=1;
globals->is_ref=1;
globals->type = IS_ARRAY;
globals->value.ht = &EG(symbol_table);
if (zend_hash_add(EG(active_symbol_table), "GLOBALS", sizeof("GLOBALS"), &globals, sizeof(zval *), NULL)==FAILURE) {
efree(globals);
}
}
while (opline<end) {
switch(opline->opcode) {
case ZEND_ADD:
EG(binary_op) = add_function;
goto binary_op_addr;
case ZEND_SUB:
EG(binary_op) = sub_function;
goto binary_op_addr;
case ZEND_MUL:
EG(binary_op) = mul_function;
goto binary_op_addr;
case ZEND_DIV:
EG(binary_op) = div_function;
goto binary_op_addr;
case ZEND_MOD:
EG(binary_op) = mod_function;
goto binary_op_addr;
case ZEND_SL:
EG(binary_op) = shift_left_function;
goto binary_op_addr;
case ZEND_SR:
EG(binary_op) = shift_right_function;
goto binary_op_addr;
case ZEND_CONCAT:
EG(binary_op) = concat_function;
goto binary_op_addr;
case ZEND_IS_EQUAL:
EG(binary_op) = is_equal_function;
goto binary_op_addr;
case ZEND_IS_NOT_EQUAL:
EG(binary_op) = is_not_equal_function;
goto binary_op_addr;
case ZEND_IS_SMALLER:
EG(binary_op) = is_smaller_function;
goto binary_op_addr;
case ZEND_IS_SMALLER_OR_EQUAL:
EG(binary_op) = is_smaller_or_equal_function;
goto binary_op_addr;
case ZEND_BW_OR:
EG(binary_op) = bitwise_or_function;
goto binary_op_addr;
case ZEND_BW_AND:
EG(binary_op) = bitwise_and_function;
goto binary_op_addr;
case ZEND_BW_XOR:
EG(binary_op) = bitwise_xor_function;
goto binary_op_addr;
case ZEND_BOOL_XOR:
EG(binary_op) = boolean_xor_function;
/* Fall through */
binary_op_addr:
EG(binary_op)(&Ts[opline->result.u.var].tmp_var,
get_zval_ptr(&opline->op1, Ts, &EG(free_op1), BP_VAR_R),
get_zval_ptr(&opline->op2, Ts, &EG(free_op2), BP_VAR_R) );
FREE_OP(&opline->op1, EG(free_op1));
FREE_OP(&opline->op2, EG(free_op2));