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6ec1acbe32
php-src/Zend/zend_execute.c
Zeev Suraski 6ec1acbe32 Phase 3: 
Use a single bit to mark IS_REF variables
1999-07-09 18:19:48 +00:00

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998, 1999 Andi Gutmans, Zeev Suraski |
+----------------------------------------------------------------------+
| This source file is subject to the Zend license, that is bundled |
| with this package in the file LICENSE. If you did not receive a |
| copy of the Zend license, please mail us at zend@zend.com so we can |
| send you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
#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"
static void destroy_garbage(HashTable *ht)
{
zend_hash_destroy(ht);
efree(ht);
}
#define INC_AI_COUNT(znode_ptr) if (!((znode_ptr)->u.EA.type & EXT_TYPE_UNUSED)) { EG(AiCount)++; }
#define DEC_AI_COUNT() if (--EG(AiCount)==0) { zend_ptr_stack_clean(&EG(garbage), (void (*)(void *)) destroy_garbage); }
#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);
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) {
DEC_AI_COUNT();
*should_free = 0;
return *Ts[node->u.var].var;
} 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.EA=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.EA=1;
T->tmp_var.type = IS_STRING;
return &T->tmp_var;
}
break;
}
}
break;
case IS_UNUSED:
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) {
DEC_AI_COUNT();
}
return Ts[node->u.var].var;
break;
default:
return NULL;
break;
}
}
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;
if (value->type!=IS_STRING) {
tmp = *value;
zval_copy_ctor(&tmp);
convert_to_string(&tmp);
value = &tmp;
}
T->EA.str->value.str.val[T->EA.offset] = 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 (value == &tmp) {
zval_dtor(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 = &EG(uninitialized_zval_ptr);
INC_AI_COUNT(result);
return;
}
variable_ptr = *variable_ptr_ptr;
if (variable_ptr == EG(error_zval_ptr)) {
if (result) {
Ts[result->u.var].var = &EG(uninitialized_zval_ptr);
INC_AI_COUNT(result);
}
return;
}
if (PZVAL_IS_REF(variable_ptr)) {
if (variable_ptr!=value) {
short refcount=variable_ptr->refcount;
zendi_zval_dtor(*variable_ptr);
*variable_ptr = *value;
variable_ptr->refcount = refcount;
variable_ptr->EA = ZEND_EA_IS_REF;
if (type!=IS_TMP_VAR) {
zendi_zval_copy_ctor(*variable_ptr);
}
}
} else {
variable_ptr->refcount--;
if (variable_ptr->refcount==0) {
switch (type) {
case IS_VAR:
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:
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)->EA=0;
}
if (result) {
Ts[result->u.var].var = variable_ptr_ptr;
INC_AI_COUNT(result);
}
}
/* 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.constant.value.lval) {
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) {
EG(AiCount)++;
}
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.constant.value.lval == ZEND_FETCH_LOCAL) {
FREE_OP(op1, free_op1);
} else if (op2->u.constant.value.lval == ZEND_FETCH_STATIC) {
zval_update_constant(*retval);
}
if (varname == &tmp_varname) {
zval_dtor(varname);
}
Ts[result->u.var].var = retval;
INC_AI_COUNT(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_LONG: {
if (zend_hash_index_find(ht, dim->value.lval, (void **) &retval) == FAILURE) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE,"Undefined offset: %d", dim->value.lval);
/* break missing intentionally */
case BP_VAR_IS:
retval = &EG(uninitialized_zval_ptr);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined offset: %d", dim->value.lval);
/* break missing intentionally */
case BP_VAR_W: {
zval *new_zval = &EG(uninitialized_zval);
new_zval->refcount++;
zend_hash_index_update(ht, dim->value.lval, &new_zval, sizeof(zval *), (void **) &retval);
}
break;
}
}
}
break;
/* we need to do implement this nicely somehow ZA
case IS_DOUBLE:
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;
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);
return;
case BP_VAR_W:
case BP_VAR_RW:
*retval = &EG(error_zval_ptr);
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)) {
INC_AI_COUNT(result);
*retval = &EG(error_zval_ptr);
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->EA=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;
container->refcount=1;
container->EA=0;
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);
}
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);
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);
}
break;
}
INC_AI_COUNT(result);
}
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) {
INC_AI_COUNT(result);
Ts[result->u.var].var = &EG(uninitialized_zval_ptr);
return;
}
INC_AI_COUNT(result);
Ts[result->u.var].var = zend_fetch_dimension_address_inner(container->value.ht, op2, Ts, BP_VAR_R ELS_CC);
}
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;
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);
return;
case BP_VAR_W:
case BP_VAR_RW:
*retval = &EG(error_zval_ptr);
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)) {
INC_AI_COUNT(result);
*retval = &EG(error_zval_ptr);
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_ptr;
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->EA=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);
INC_AI_COUNT(result);
if (type==BP_VAR_R || type==BP_VAR_IS) {
*retval = &EG(uninitialized_zval_ptr);
return;
} else {
*retval = &EG(error_zval_ptr);
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;
container->refcount=1;
container->EA=0;
zendi_zval_copy_ctor(*container);
}
INC_AI_COUNT(result);
*retval = zend_fetch_property_address_inner(container->value.obj.properties, op2, Ts, type ELS_CC);
}
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
void execute(zend_op_array *op_array ELS_DC)
{
zend_op *opline = op_array->opcodes;
int free_op1, free_op2;
int (*unary_op)(zval *result, zval *op1);
int (*binary_op)(zval *result, zval *op1, zval *op2);
zend_op *end = op_array->opcodes + op_array->last;
zend_function_state function_state;
HashTable *calling_symbol_table;
zend_function *function_being_called=NULL;
zval **object_ptr=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->EA=ZEND_EA_IS_REF;
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:
binary_op = add_function;
goto binary_op_addr;
case ZEND_SUB:
binary_op = sub_function;
goto binary_op_addr;
case ZEND_MUL:
binary_op = mul_function;
goto binary_op_addr;
case ZEND_DIV:
binary_op = div_function;
goto binary_op_addr;
case ZEND_MOD:
binary_op = mod_function;
goto binary_op_addr;
case ZEND_SL:
binary_op = shift_left_function;
goto binary_op_addr;
case ZEND_SR:
binary_op = shift_right_function;
goto binary_op_addr;
case ZEND_CONCAT:
binary_op = concat_function;
goto binary_op_addr;
case ZEND_IS_EQUAL:
binary_op = is_equal_function;
goto binary_op_addr;
case ZEND_IS_NOT_EQUAL:
binary_op = is_not_equal_function;
goto binary_op_addr;
case ZEND_IS_SMALLER:
binary_op = is_smaller_function;
goto binary_op_addr;
case ZEND_IS_SMALLER_OR_EQUAL:
binary_op = is_smaller_or_equal_function;
goto binary_op_addr;
case ZEND_BW_OR:
binary_op = bitwise_or_function;
goto binary_op_addr;
case ZEND_BW_AND:
binary_op = bitwise_and_function;
goto binary_op_addr;
case ZEND_BW_XOR:
binary_op = bitwise_xor_function;
goto binary_op_addr;
case ZEND_BOOL_XOR:
binary_op = boolean_xor_function;
/* Fall through */
binary_op_addr:
binary_op(&Ts[opline->result.u.var].tmp_var,
get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R),
get_zval_ptr(&opline->op2, Ts, &free_op2, BP_VAR_R) );
FREE_OP(&opline->op1, free_op1);
FREE_OP(&opline->op2, free_op2);
break;
case ZEND_BW_NOT:
case ZEND_BOOL_NOT:
unary_op = get_unary_op(opline->opcode);
unary_op(&Ts[opline->result.u.var].tmp_var,
get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R) );
FREE_OP(&opline->op1, free_op1);
break;
case ZEND_ASSIGN_ADD:
binary_op = add_function;
goto binary_assign_op_addr;
case ZEND_ASSIGN_SUB:
binary_op = sub_function;
goto binary_assign_op_addr;
case ZEND_ASSIGN_MUL:
binary_op = mul_function;
goto binary_assign_op_addr;
case ZEND_ASSIGN_DIV:
binary_op = div_function;
goto binary_assign_op_addr;
case ZEND_ASSIGN_MOD:
binary_op = mod_function;
goto binary_assign_op_addr;
case ZEND_ASSIGN_SL:
binary_op = shift_left_function;
goto binary_assign_op_addr;
case ZEND_ASSIGN_SR:
binary_op = shift_right_function;
goto binary_assign_op_addr;
case ZEND_ASSIGN_CONCAT:
binary_op = concat_function;
goto binary_assign_op_addr;
case ZEND_ASSIGN_BW_OR:
binary_op = bitwise_or_function;
goto binary_assign_op_addr;
case ZEND_ASSIGN_BW_AND:
binary_op = bitwise_and_function;
goto binary_assign_op_addr;
case ZEND_ASSIGN_BW_XOR:
binary_op = bitwise_xor_function;
/* Fall through */
binary_assign_op_addr: {
zval **var_ptr = get_zval_ptr_ptr(&opline->op1, Ts, BP_VAR_RW);
if (!var_ptr) {
zend_error(E_ERROR, "Cannot use assign-op operators with overloaded objects nor string offsets");
}
if (*var_ptr == EG(error_zval_ptr)) {
Ts[opline->result.u.var].var = &EG(uninitialized_zval_ptr);
INC_AI_COUNT(&opline->result);
opline++;
continue;
}
if (!PZVAL_IS_REF(*var_ptr)) {
if ((*var_ptr)->refcount>1) {
zval *orig_var=*var_ptr;
(*var_ptr)->refcount--;
*var_ptr = (zval *) emalloc(sizeof(zval));
**var_ptr = *orig_var;
zendi_zval_copy_ctor(**var_ptr);
(*var_ptr)->refcount=1;
}
}
binary_op(*var_ptr, *var_ptr, get_zval_ptr(&opline->op2, Ts, &free_op2, BP_VAR_R));
Ts[opline->result.u.var].var = var_ptr;
INC_AI_COUNT(&opline->result);
FREE_OP(&opline->op2, free_op2);
}
break;
case ZEND_PRE_INC:
case ZEND_PRE_DEC:
case ZEND_POST_INC:
case ZEND_POST_DEC: {
int (*incdec_op)(zval *op);
zval **var_ptr = get_zval_ptr_ptr(&opline->op1, Ts, BP_VAR_RW);
if (!var_ptr) {
zend_error(E_ERROR, "Cannot increment/decrement overloaded objects nor string offsets");
}
if (*var_ptr == EG(error_zval_ptr)) {
Ts[opline->result.u.var].var = &EG(uninitialized_zval_ptr);
INC_AI_COUNT(&opline->result);
opline++;
continue;
}
get_incdec_op(incdec_op, opline->opcode);
switch (opline->opcode) {
case ZEND_POST_INC:
case ZEND_POST_DEC:
Ts[opline->result.u.var].tmp_var = **var_ptr;
zendi_zval_copy_ctor(Ts[opline->result.u.var].tmp_var);
break;
}
if (!PZVAL_IS_REF(*var_ptr)) {
if ((*var_ptr)->refcount>1) {
zval *orig_var = *var_ptr;
(*var_ptr)->refcount--;
*var_ptr = (zval *) emalloc(sizeof(zval));
**var_ptr = *orig_var;
zendi_zval_copy_ctor(**var_ptr);
(*var_ptr)->refcount=1;
}
}
incdec_op(*var_ptr);
switch (opline->opcode) {
case ZEND_PRE_INC:
case ZEND_PRE_DEC:
Ts[opline->result.u.var].var = var_ptr;
INC_AI_COUNT(&opline->result);
break;
}
}
break;
case ZEND_PRINT:
zend_print_variable(get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R));
Ts[opline->result.u.var].tmp_var.value.lval = 1;
Ts[opline->result.u.var].tmp_var.type = IS_LONG;
FREE_OP(&opline->op1, free_op1);
break;
case ZEND_ECHO:
zend_print_variable(get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R));
FREE_OP(&opline->op1, free_op1);
break;
case ZEND_FETCH_R:
zend_fetch_var_address(&opline->result, &opline->op1, &opline->op2, Ts, BP_VAR_R ELS_CC);
break;
case ZEND_FETCH_W:
zend_fetch_var_address(&opline->result, &opline->op1, &opline->op2, Ts, BP_VAR_W ELS_CC);
break;
case ZEND_FETCH_RW:
zend_fetch_var_address(&opline->result, &opline->op1, &opline->op2, Ts, BP_VAR_RW ELS_CC);
break;
case ZEND_FETCH_IS:
zend_fetch_var_address(&opline->result, &opline->op1, &opline->op2, Ts, BP_VAR_IS ELS_CC);
break;
case ZEND_FETCH_DIM_R:
if (opline->extended_value == ZEND_FETCH_NO_AI_COUNT) {
EG(AiCount)++;
}
zend_fetch_dimension_address(&opline->result, &opline->op1, &opline->op2, Ts, BP_VAR_R ELS_CC);
break;
case ZEND_FETCH_DIM_W:
zend_fetch_dimension_address(&opline->result, &opline->op1, &opline->op2, Ts, BP_VAR_W ELS_CC);
break;
case ZEND_FETCH_DIM_RW:
zend_fetch_dimension_address(&opline->result, &opline->op1, &opline->op2, Ts, BP_VAR_RW ELS_CC);
break;
case ZEND_FETCH_DIM_IS:
zend_fetch_dimension_address(&opline->result, &opline->op1, &opline->op2, Ts, BP_VAR_IS ELS_CC);
break;
case ZEND_FETCH_OBJ_R:
zend_fetch_property_address(&opline->result, &opline->op1, &opline->op2, Ts, BP_VAR_R ELS_CC);
break;
case ZEND_FETCH_OBJ_W:
zend_fetch_property_address(&opline->result, &opline->op1, &opline->op2, Ts, BP_VAR_W ELS_CC);
break;
case ZEND_FETCH_OBJ_RW:
zend_fetch_property_address(&opline->result, &opline->op1, &opline->op2, Ts, BP_VAR_RW ELS_CC);
break;
case ZEND_FETCH_OBJ_IS:
zend_fetch_property_address(&opline->result, &opline->op1, &opline->op2, Ts, BP_VAR_IS ELS_CC);
break;
case ZEND_FETCH_DIM_TMP_VAR:
zend_fetch_dimension_address_from_tmp_var(&opline->result, &opline->op1, &opline->op2, Ts ELS_CC);
break;
case ZEND_ASSIGN: {
zval *value = get_zval_ptr(&opline->op2, Ts, &free_op2, BP_VAR_R);
zend_assign_to_variable(&opline->result, &opline->op1, &opline->op2, value, (free_op2?IS_TMP_VAR:opline->op2.op_type), Ts ELS_CC);
/* zend_assign_to_variable() always takes care of op2, never free it! */
}
break;
case ZEND_ASSIGN_REF:
zend_assign_to_variable_reference(&opline->result, get_zval_ptr_ptr(&opline->op1, Ts, BP_VAR_W), get_zval_ptr_ptr(&opline->op2, Ts, BP_VAR_W), Ts ELS_CC);
INC_AI_COUNT(&opline->result);
break;
case ZEND_JMP:
#if DEBUG_ZEND>=2
printf("Jumping to %d\n", opline->op1.u.opline_num);
#endif
opline = &op_array->opcodes[opline->op1.u.opline_num];
continue;
break;
case ZEND_JMPZ: {
znode *op1 = &opline->op1;
if (!i_zend_is_true(get_zval_ptr(op1, Ts, &free_op1, BP_VAR_R))) {
#if DEBUG_ZEND>=2
printf("Conditional jmp to %d\n", opline->op2.u.opline_num);
#endif
opline = &op_array->opcodes[opline->op2.u.opline_num];
FREE_OP(op1, free_op1);
continue;
}
FREE_OP(op1, free_op1);
}
break;
case ZEND_JMPNZ: {
znode *op1 = &opline->op1;
if (zend_is_true(get_zval_ptr(op1, Ts, &free_op1, BP_VAR_R))) {
#if DEBUG_ZEND>=2
printf("Conditional jmp to %d\n", opline->op2.u.opline_num);
#endif
opline = &op_array->opcodes[opline->op2.u.opline_num];
FREE_OP(op1, free_op1);
continue;
}
FREE_OP(op1, free_op1);
}
break;
case ZEND_JMPZNZ: {
znode *res = &opline->result;
if (!zend_is_true(get_zval_ptr(res, Ts, &free_op1, BP_VAR_R))) {
#if DEBUG_ZEND>=2
printf("Conditional jmp on false to %d\n", opline->op2.u.opline_num);
#endif
opline = &op_array->opcodes[opline->op2.u.opline_num];
} else {
#if DEBUG_ZEND>=2
printf("Conditional jmp on true to %d\n", opline->op1.u.opline_num);
#endif
opline = &op_array->opcodes[opline->op1.u.opline_num];
}
FREE_OP(res, free_op1);
}
continue;
break;
case ZEND_JMPZ_EX: {
zend_op *original_opline = opline;
int retval = zend_is_true(get_zval_ptr(&original_opline->op1, Ts, &free_op1, BP_VAR_R));
if (!retval) {
#if DEBUG_ZEND>=2
printf("Conditional jmp to %d\n", opline->op2.u.opline_num);
#endif
opline = &op_array->opcodes[opline->op2.u.opline_num];
FREE_OP(&original_opline->op1, free_op1);
Ts[original_opline->result.u.var].tmp_var.value.lval = retval;
Ts[original_opline->result.u.var].tmp_var.type = IS_LONG;
continue;
}
FREE_OP(&original_opline->op1, free_op1);
Ts[original_opline->result.u.var].tmp_var.value.lval = retval;
Ts[original_opline->result.u.var].tmp_var.type = IS_LONG;
}
break;
case ZEND_JMPNZ_EX: {
zend_op *original_opline = opline;
int retval = zend_is_true(get_zval_ptr(&original_opline->op1, Ts, &free_op1, BP_VAR_R));
if (retval) {
#if DEBUG_ZEND>=2
printf("Conditional jmp to %d\n", opline->op2.u.opline_num);
#endif
opline = &op_array->opcodes[opline->op2.u.opline_num];
FREE_OP(&original_opline->op1, free_op1);
Ts[original_opline->result.u.var].tmp_var.value.lval = retval;
Ts[original_opline->result.u.var].tmp_var.type = IS_LONG;
continue;
}
FREE_OP(&original_opline->op1, free_op1);
Ts[original_opline->result.u.var].tmp_var.value.lval = retval;
Ts[original_opline->result.u.var].tmp_var.type = IS_LONG;
}
break;
case ZEND_FREE:
zendi_zval_dtor(Ts[opline->op1.u.var].tmp_var);
break;
case ZEND_INIT_STRING:
Ts[opline->result.u.var].tmp_var.value.str.val = emalloc(1);
Ts[opline->result.u.var].tmp_var.value.str.val[0] = 0;
Ts[opline->result.u.var].tmp_var.value.str.len = 0;
Ts[opline->result.u.var].tmp_var.refcount = 1;
break;
case ZEND_ADD_CHAR:
add_char_to_string( &Ts[opline->result.u.var].tmp_var,
get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_NA),
&opline->op2.u.constant);
/* FREE_OP is missing intentionally here - we're always working on the same temporary variable */
break;
case ZEND_ADD_STRING:
add_string_to_string( &Ts[opline->result.u.var].tmp_var,
get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_NA),
&opline->op2.u.constant);
/* FREE_OP is missing intentionally here - we're always working on the same temporary variable */
break;
case ZEND_ADD_VAR: {
zval *var = get_zval_ptr(&opline->op2, Ts, &free_op2, BP_VAR_R);
zval var_copy;
int use_copy;
zend_make_printable_zval(var, &var_copy, &use_copy);
if (use_copy) {
var = &var_copy;
}
add_string_to_string( &Ts[opline->result.u.var].tmp_var,
get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_NA),
var);
if (use_copy) {
zval_dtor(var);
}
/* original comment, possibly problematic:
* FREE_OP is missing intentionally here - we're always working on the same temporary variable
* (Zeev): I don't think it's problematic, we only use variables
* which aren't affected by FREE_OP()'s anyway, unless they're
* string offsets or overloaded objects
*/
FREE_OP(&opline->op2, free_op2);
}
break;
case ZEND_INIT_FCALL_BY_NAME: {
zval *function_name;
zend_function *function;
HashTable *active_function_table;
zval tmp;
zend_ptr_stack_push(&EG(arg_types_stack), function_being_called);
zend_ptr_stack_push(&EG(arg_types_stack), object_ptr);
if (opline->extended_value & ZEND_CTOR_CALL) {
/* constructor call */
EG(AiCount)++; /* for op1 */
if (opline->op2.op_type==IS_VAR) {
EG(AiCount)++;
}
}
function_name = get_zval_ptr(&opline->op2, Ts, &free_op2, BP_VAR_R);
tmp = *function_name;
zval_copy_ctor(&tmp);
convert_to_string(&tmp);
function_name = &tmp;
zend_str_tolower(tmp.value.str.val, tmp.value.str.len);
if (opline->op1.op_type != IS_UNUSED) {
if (opline->op1.op_type==IS_CONST) { /* used for class_name::function() */
zend_class_entry *ce;
if (zend_hash_find(EG(class_table), opline->op1.u.constant.value.str.val, opline->op1.u.constant.value.str.len+1, (void **) &ce)==FAILURE) {
zend_error(E_ERROR, "Undefined class name '%s'", opline->op1.u.constant.value.str.val);
}
active_function_table = &ce->function_table;
if (zend_hash_find(EG(active_symbol_table), "this", sizeof("this"), (void **) &object_ptr)==FAILURE) {
object_ptr=NULL;
}
} else { /* used for member function calls */
object_ptr = get_zval_ptr_ptr(&opline->op1, Ts, BP_VAR_R);
if (!object_ptr || (*object_ptr)->value.obj.ce->handle_function_call) { /* overloaded function call */
zend_overloaded_element overloaded_element;
zend_property_reference *property_reference;
overloaded_element.element = *function_name;
overloaded_element.type = IS_METHOD;
if (object_ptr) {
zend_property_reference property_reference;
if ((*object_ptr)->type != IS_OBJECT) {
zend_error(E_ERROR, "Call to a member function on a non-object");
}
property_reference.object = object_ptr;
property_reference.type = BP_VAR_NA;
zend_llist_init(&property_reference.elements_list, sizeof(zend_overloaded_element), NULL, 0);
zend_stack_push(&EG(overloaded_objects_stack), &property_reference, sizeof(zend_property_reference));
}
zend_stack_top(&EG(overloaded_objects_stack), (void **) &property_reference);
zend_llist_add_element(&property_reference->elements_list, &overloaded_element);
function_being_called = (zend_function *) emalloc(sizeof(zend_function));
function_being_called->type = ZEND_OVERLOADED_FUNCTION;
function_being_called->common.arg_types = NULL;
goto overloaded_function_call_cont;
}
if ((*object_ptr)->type != IS_OBJECT) {
zend_error(E_ERROR, "Call to a member function on a non-object");
}
active_function_table = &(*object_ptr)->value.obj.ce->function_table;
}
} else { /* function pointer */
object_ptr = NULL;
active_function_table = EG(function_table);
}
if (zend_hash_find(active_function_table, function_name->value.str.val, function_name->value.str.len+1, (void **) &function)==FAILURE) {
zend_error(E_ERROR, "Call to undefined function: %s()", function_name->value.str.val);
}
zval_dtor(&tmp);
function_being_called = function;
overloaded_function_call_cont:
FREE_OP(&opline->op2, free_op2);
}
break;
case ZEND_DO_FCALL_BY_NAME:
function_state.function = function_being_called;
goto do_fcall_common;
case ZEND_DO_FCALL: {
zval *fname = get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R);
if (zend_hash_find(EG(function_table), fname->value.str.val, fname->value.str.len+1, (void **) &function_state.function)==FAILURE) {
zend_error(E_ERROR, "Unknown function: %s()\n", fname->value.str.val);
}
FREE_OP(&opline->op1, free_op1);
goto do_fcall_common;
}
do_fcall_common:
{
zval *original_return_value;
zend_ptr_stack_push(&EG(argument_stack), (void *) opline->extended_value);
if (function_state.function->type==ZEND_INTERNAL_FUNCTION) {
var_uninit(&Ts[opline->result.u.var].tmp_var);
((zend_internal_function *) function_state.function)->handler(opline->extended_value, &Ts[opline->result.u.var].tmp_var, &EG(regular_list), &EG(persistent_list), (object_ptr?*object_ptr:NULL));
} else if (function_state.function->type==ZEND_USER_FUNCTION) {
if (EG(symtable_cache_ptr)>=EG(symtable_cache)) {
/*printf("Cache hit! Reusing %x\n", symtable_cache[symtable_cache_ptr]);*/
function_state.function_symbol_table = *(EG(symtable_cache_ptr)--);
} else {
function_state.function_symbol_table = (HashTable *) emalloc(sizeof(HashTable));
zend_hash_init(function_state.function_symbol_table, 0, NULL, PVAL_PTR_DTOR, 0);
/*printf("Cache miss! Initialized %x\n", function_state.function_symbol_table);*/
}
calling_symbol_table = EG(active_symbol_table);
EG(active_symbol_table) = function_state.function_symbol_table;
if (opline->opcode==ZEND_DO_FCALL_BY_NAME
&& object_ptr
&& function_being_called->type!=ZEND_OVERLOADED_FUNCTION) {
zval *dummy = (zval *) emalloc(sizeof(zval)), **this_ptr;
var_uninit(dummy);
dummy->refcount=1;
dummy->EA=0;
zend_hash_update_ptr(function_state.function_symbol_table, "this", sizeof("this"), dummy, sizeof(zval *), (void **) &this_ptr);
zend_assign_to_variable_reference(NULL, this_ptr, object_ptr, NULL ELS_CC);
object_ptr = NULL;
}
original_return_value = EG(return_value);
EG(return_value) = &Ts[opline->result.u.var].tmp_var;
var_uninit(EG(return_value));
EG(active_op_array) = (zend_op_array *) function_state.function;
zend_execute(EG(active_op_array) ELS_CC);
EG(opline_ptr) = &opline;
EG(active_op_array) = op_array;
EG(return_value)=original_return_value;
if (EG(symtable_cache_ptr)>=EG(symtable_cache_limit)) {
zend_hash_destroy(function_state.function_symbol_table);
efree(function_state.function_symbol_table);
} else {
*(++EG(symtable_cache_ptr)) = function_state.function_symbol_table;
zend_hash_clean(*EG(symtable_cache_ptr));
}
EG(active_symbol_table) = calling_symbol_table;
} else { /* ZEND_OVERLOADED_FUNCTION */
call_overloaded_function(opline->extended_value, &Ts[opline->result.u.var].tmp_var, &EG(regular_list), &EG(persistent_list) ELS_CC);
efree(function_being_called);
}
if (opline->opcode == ZEND_DO_FCALL_BY_NAME) {
object_ptr = zend_ptr_stack_pop(&EG(arg_types_stack));
function_being_called = zend_ptr_stack_pop(&EG(arg_types_stack));
}
function_state.function = (zend_function *) op_array;
EG(function_state_ptr) = &function_state;
zend_ptr_stack_clear_multiple(ELS_C);
}
break;
case ZEND_RETURN: {
zval *retval = get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R);
*EG(return_value) = *retval;
if (!free_op1) {
zendi_zval_copy_ctor(*EG(return_value));
}
#if SUPPORT_INTERACTIVE
op_array->last_executed_op_number = opline-op_array->opcodes;
#endif
free_alloca(Ts);
return;
}
break;
case ZEND_SEND_VAL:
if (opline->extended_value==ZEND_DO_FCALL_BY_NAME
&& function_being_called
&& function_being_called->common.arg_types
&& opline->op2.u.opline_num<=function_being_called->common.arg_types[0]
&& function_being_called->common.arg_types[opline->op2.u.opline_num]==BYREF_FORCE) {
zend_error(E_ERROR, "Cannot pass parameter %d by reference", opline->op2.u.opline_num);
}
{
zval *valptr = (zval *) emalloc(sizeof(zval));
*valptr = Ts[opline->op1.u.var].tmp_var;
valptr->refcount=1;
valptr->EA=0;
zend_ptr_stack_push(&EG(argument_stack), valptr);
}
break;
case ZEND_SEND_VAR:
if (opline->extended_value==ZEND_DO_FCALL_BY_NAME
&& function_being_called
&& function_being_called->common.arg_types
&& opline->op2.u.opline_num<=function_being_called->common.arg_types[0]
&& function_being_called->common.arg_types[opline->op2.u.opline_num]==BYREF_FORCE) {
goto send_by_ref;
}
{
zval *varptr = get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R);
if (varptr == &EG(uninitialized_zval)) {
varptr = (zval *) emalloc(sizeof(zval));
var_uninit(varptr);
varptr->refcount=0;
varptr->EA=0;
} else if (PZVAL_IS_REF(varptr)) {
zval *original_var = varptr;
varptr = (zval *) emalloc(sizeof(zval));
*varptr = *original_var;
varptr->EA = 0;
varptr->refcount = 0;
zval_copy_ctor(varptr);
}
varptr->refcount++;
zend_ptr_stack_push(&EG(argument_stack), varptr);
FREE_OP(&opline->op1, free_op1); /* for string offsets */
}
break;
send_by_ref:
case ZEND_SEND_REF: {
zval **varptr_ptr = get_zval_ptr_ptr(&opline->op1, Ts, BP_VAR_W);
zval *varptr = *varptr_ptr;
if (!PZVAL_IS_REF(varptr)) {
/* code to break away this variable */
if (varptr->refcount>1) {
varptr->refcount--;
*varptr_ptr = (zval *) emalloc(sizeof(zval));
**varptr_ptr = *varptr;
varptr = *varptr_ptr;
varptr->refcount = 1;
zval_copy_ctor(varptr);
}
varptr->EA = ZEND_EA_IS_REF;
/* at the end of this code refcount is always 1 */
}
varptr->refcount++;
zend_ptr_stack_push(&EG(argument_stack), varptr);
}
break;
case ZEND_RECV: {
zval **param;
if (zend_ptr_stack_get_arg(opline->op1.u.constant.value.lval, (void **) &param ELS_CC)==FAILURE) {
zend_error(E_NOTICE, "Missing argument %d for %s()\n", opline->op1.u.constant.value.lval, get_active_function_name());
DEC_AI_COUNT();
} else if (PZVAL_IS_REF(*param)) {
zend_assign_to_variable_reference(NULL, get_zval_ptr_ptr(&opline->result, Ts, BP_VAR_W), param, NULL ELS_CC);
} else {
zend_assign_to_variable(NULL, &opline->result, NULL, *param, IS_VAR, Ts ELS_CC);
}
}
break;
case ZEND_RECV_INIT: {
zval **param, *assignment_value;
if (zend_ptr_stack_get_arg(opline->op1.u.constant.value.lval, (void **) &param ELS_CC)==FAILURE) {
if (opline->op2.op_type == IS_UNUSED) {
DEC_AI_COUNT();
break;
}
if (opline->op2.u.constant.type == IS_CONSTANT) {
zval *default_value = (zval *) emalloc(sizeof(zval));
zval tmp;
*default_value = opline->op2.u.constant;
if (!zend_get_constant(default_value->value.str.val, default_value->value.str.len, &tmp)) {
default_value->type = IS_STRING;
zval_copy_ctor(default_value);
} else {
*default_value = tmp;
}
default_value->refcount=0;
default_value->EA=0;
param = &default_value;
assignment_value = default_value;
} else {
param = NULL;
assignment_value = &opline->op2.u.constant;
}
} else {
assignment_value = *param;
}
if (PZVAL_IS_REF(assignment_value)) {
zend_assign_to_variable_reference(NULL, get_zval_ptr_ptr(&opline->result, Ts, BP_VAR_W), param, NULL ELS_CC);
} else {
zend_assign_to_variable(NULL, &opline->result, NULL, assignment_value, IS_VAR, Ts ELS_CC);
}
}
break;
case ZEND_BOOL:
/* PHP 3.0 returned "" for false and 1 for true, here we use 0 and 1 for now */
Ts[opline->result.u.var].tmp_var.value.lval = zend_is_true(get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R));
Ts[opline->result.u.var].tmp_var.type = IS_LONG;
FREE_OP(&opline->op1, free_op1);
break;
case ZEND_BRK:
case ZEND_CONT: {
zval *nest_levels_zval = get_zval_ptr(&opline->op2, Ts, &free_op2, BP_VAR_R);
zval tmp;
int array_offset, nest_levels, original_nest_levels;
zend_brk_cont_element *jmp_to;
if (nest_levels_zval->type != IS_LONG) {
tmp = *nest_levels_zval;
zval_copy_ctor(&tmp);
convert_to_long(&tmp);
nest_levels = tmp.value.lval;
} else {
nest_levels = nest_levels_zval->value.lval;
}
original_nest_levels = nest_levels;
array_offset = opline->op1.u.opline_num;
do {
if (array_offset==-1) {
zend_error(E_ERROR, "Cannot break/continue %d levels\n", original_nest_levels);
}
jmp_to = &op_array->brk_cont_array[array_offset];
array_offset = jmp_to->parent;
} while (--nest_levels > 0);
if (opline->opcode == ZEND_BRK) {
opline = op_array->opcodes+jmp_to->brk;
} else {
opline = op_array->opcodes+jmp_to->cont;
}
FREE_OP(&opline->op2, free_op2);
continue;
}
break;
case ZEND_CASE:
if (opline->op1.op_type == IS_VAR) {
EG(AiCount)++;
}
is_equal_function(&Ts[opline->result.u.var].tmp_var,
get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R),
get_zval_ptr(&opline->op2, Ts, &free_op2, BP_VAR_R) );
FREE_OP(&opline->op2, free_op2);
break;
case ZEND_NEW: {
zval *tmp = get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R);
zval class_name;
zend_class_entry *ce;
class_name = *tmp;
zval_copy_ctor(&class_name);
convert_to_string(&class_name);
zend_str_tolower(class_name.value.str.val, class_name.value.str.len);
if (zend_hash_find(EG(class_table), class_name.value.str.val, class_name.value.str.len+1, (void **) &ce)==FAILURE) {
zend_error(E_ERROR, "Cannot instanciate non-existant class: %s", class_name.value.str.val);
}
object_init_ex(&Ts[opline->result.u.var].tmp_var, ce);
zval_dtor(&class_name);
FREE_OP(&opline->op1, free_op1);
}
break;
case ZEND_FETCH_CONSTANT:
if (!zend_get_constant(opline->op1.u.constant.value.str.val, opline->op1.u.constant.value.str.len, &Ts[opline->result.u.var].tmp_var)) {
zend_error(E_NOTICE, "Use of undefined constant %s - assumed '%s'",
opline->op1.u.constant.value.str.val,
opline->op1.u.constant.value.str.val);
Ts[opline->result.u.var].tmp_var = opline->op1.u.constant;
zval_copy_ctor(&Ts[opline->result.u.var].tmp_var);
}
break;
case ZEND_INIT_ARRAY:
case ZEND_ADD_ARRAY_ELEMENT: {
zval *array_ptr = &Ts[opline->result.u.var].tmp_var;
zval *expr=get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R);
zval *offset=get_zval_ptr(&opline->op2, Ts, &free_op2, BP_VAR_R);
if (opline->opcode==ZEND_INIT_ARRAY) {
array_init(array_ptr);
if (!expr) {
break;
}
}
if (free_op1) { /* temporary variable */
zval *new_expr = (zval *) emalloc(sizeof(zval));
*new_expr = *expr;
expr = new_expr;
expr->refcount=1;
expr->EA=0;
} else {
if (PZVAL_IS_REF(expr)) {
zval *new_expr = (zval *) emalloc(sizeof(zval));
*new_expr = *expr;
expr = new_expr;
zendi_zval_copy_ctor(*expr);
expr->refcount=1;
expr->EA=0;
} else {
expr->refcount++;
}
}
if (offset) {
switch(offset->type) {
case IS_DOUBLE:
zend_hash_index_update(array_ptr->value.ht, (long) offset->value.lval, &expr, sizeof(zval *), NULL);
break;
case IS_LONG:
zend_hash_index_update(array_ptr->value.ht, offset->value.lval, &expr, sizeof(zval *), NULL);
break;
case IS_STRING:
zend_hash_update(array_ptr->value.ht, offset->value.str.val, offset->value.str.len+1, &expr, sizeof(zval *), NULL);
break;
default:
/* do nothing */
break;
}
FREE_OP(&opline->op2, free_op2);
} else {
zend_hash_next_index_insert(array_ptr->value.ht, &expr, sizeof(zval *), NULL);
}
}
break;
case ZEND_CAST: {
zval *expr = get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R);
zval *result = &Ts[opline->result.u.var].tmp_var;
*result = *expr;
if (!free_op1) {
zendi_zval_copy_ctor(*result);
}
switch (opline->op2.u.constant.type) {
case IS_BOOL:
convert_to_boolean(result);
break;
case IS_LONG:
convert_to_long(result);
break;
case IS_DOUBLE:
convert_to_double(result);
break;
case IS_STRING:
convert_to_string(result);
break;
case IS_ARRAY:
convert_to_array(result);
break;
case IS_OBJECT:
convert_to_object(result);
break;
}
}
break;
case ZEND_INCLUDE_OR_EVAL: {
zend_op_array *new_op_array=NULL;
zval *original_return_value = EG(return_value);
CLS_FETCH();
switch (opline->op2.u.constant.value.lval) {
case ZEND_INCLUDE:
new_op_array = compile_filename(get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R) CLS_CC);
break;
case ZEND_EVAL:
new_op_array = compile_string(get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R) CLS_CC);
break;
}
if (new_op_array) {
Ts[opline->result.u.var].tmp_var.value.lval = 1;
Ts[opline->result.u.var].tmp_var.type = IS_LONG;
EG(return_value) = &Ts[opline->result.u.var].tmp_var;
EG(active_op_array) = new_op_array;
zend_execute(new_op_array ELS_CC);
EG(opline_ptr) = &opline;
EG(active_op_array) = op_array;
EG(function_state_ptr) = &function_state;
destroy_op_array(new_op_array);
efree(new_op_array);
} else {
var_uninit(&Ts[opline->result.u.var].tmp_var);
}
EG(return_value) = original_return_value;
FREE_OP(&opline->op1, free_op1);
}
break;
case ZEND_UNSET_VAR: {
zval tmp, *variable = get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R);
if (variable->type != IS_STRING) {
tmp = *variable;
zval_copy_ctor(&tmp);
convert_to_string(&tmp);
variable = &tmp;
}
zend_hash_del(EG(active_symbol_table), variable->value.str.val, variable->value.str.len+1);
if (variable == &tmp) {
zval_dtor(&tmp);
}
FREE_OP(&opline->op1, free_op1);
}
break;
case ZEND_UNSET_DIM_OBJ: {
zval **container = get_zval_ptr_ptr(&opline->op1, Ts, BP_VAR_R);
zval *offset = get_zval_ptr(&opline->op2, Ts, &free_op2, BP_VAR_R);
if (container) {
HashTable *ht;
switch ((*container)->type) {
case IS_ARRAY:
ht = (*container)->value.ht;
break;
case IS_OBJECT:
ht = (*container)->value.obj.properties;
break;
default:
ht = NULL;
break;
}
if (ht) {
switch (offset->type) {
case IS_LONG:
zend_hash_index_del(ht, offset->value.lval);
break;
case IS_STRING:
zend_hash_del(ht, offset->value.str.val, offset->value.str.len+1);
break;
}
}
} else {
/* overloaded element */
}
FREE_OP(&opline->op2, free_op2);
}
break;
case ZEND_FE_RESET: {
zval *array = get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R);
Ts[opline->result.u.var].tmp_var = *array;
array = &Ts[opline->result.u.var].tmp_var;
if (!free_op1) {
zval_copy_ctor(array);
}
if (array->type == IS_ARRAY) {
/* probably redundant */
zend_hash_internal_pointer_reset(array->value.ht);
} else {
/* JMP to the end of foreach - TBD */
}
}
break;
case ZEND_FE_FETCH: {
zval *array = get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R);
zval *result = &Ts[opline->result.u.var].tmp_var;
zval **value, *key;
char *str_key;
ulong int_key;
if (array->type != IS_ARRAY) {
zend_error(E_WARNING, "Non array argument supplied for foreach()");
opline = op_array->opcodes+opline->op2.u.opline_num;
continue;
} else if (zend_hash_get_current_data(array->value.ht, (void **) &value)==FAILURE) {
opline = op_array->opcodes+opline->op2.u.opline_num;
continue;
}
array_init(result);
(*value)->refcount++;
zend_hash_index_update(result->value.ht, 0, value, sizeof(zval *), NULL);
key = (zval *) emalloc(sizeof(zval));
key->refcount=1;
key->EA=0;
switch (zend_hash_get_current_key(array->value.ht, &str_key, &int_key)) {
case HASH_KEY_IS_STRING:
key->value.str.val = str_key;
key->value.str.len = strlen(str_key);
key->type = IS_STRING;
break;
case HASH_KEY_IS_LONG:
key->value.lval = int_key;
key->type = IS_LONG;
break;
}
zend_hash_index_update(result->value.ht, 1, &key, sizeof(zval *), NULL);
zend_hash_move_forward(array->value.ht);
}
break;
case ZEND_JMP_NO_CTOR: {
zval *object;
EG(AiCount)++;
object = get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R);
if (!object->value.obj.ce->handle_function_call
&& !zend_hash_exists(&object->value.obj.ce->function_table, object->value.obj.ce->name, object->value.obj.ce->name_length+1)) {
opline = op_array->opcodes + opline->op2.u.opline_num;
continue;
}
}
break;
case ZEND_ISSET_ISEMPTY: {
zval **var = get_zval_ptr_ptr(&opline->op1, Ts, BP_VAR_IS);
int isset;
if (!var) {
if (Ts[opline->op1.u.var].EA.type==IS_STRING_OFFSET) {
if (Ts[opline->op1.u.var].EA.offset>=0
&& Ts[opline->op1.u.var].EA.offset<Ts[opline->op1.u.var].EA.str->value.str.len) {
isset = 1;
} else {
isset = 0;
}
} else {
isset = 1;
}
} else if (var==&EG(uninitialized_zval_ptr)
|| ((*var)->type == IS_STRING && (*var)->value.str.val == undefined_variable_string)) {
isset = 0;
} else {
isset = 1;
}
switch (opline->op2.u.constant.value.lval) {
case ZEND_ISSET:
Ts[opline->result.u.var].tmp_var.value.lval = isset;
break;
case ZEND_ISEMPTY:
if (!var) {
if (!isset
|| Ts[opline->op1.u.var].EA.str->value.str.val[Ts[opline->op1.u.var].EA.offset]=='0') {
Ts[opline->result.u.var].tmp_var.value.lval = 1;
} else {
Ts[opline->result.u.var].tmp_var.value.lval = 0;
}
} else if (!isset || !zend_is_true(*var)) {
Ts[opline->result.u.var].tmp_var.value.lval = 1;
} else {
Ts[opline->result.u.var].tmp_var.value.lval = 0;
}
break;
}
Ts[opline->result.u.var].tmp_var.type = IS_BOOL;
}
break;
case ZEND_EXIT:
if (opline->op1.op_type != IS_UNUSED) {
zend_print_variable(get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R));
FREE_OP(&opline->op1, free_op1);
}
zend_bailout();
break;
case ZEND_BEGIN_SILENCE:
Ts[opline->result.u.var].tmp_var.value.lval = EG(error_reporting);
Ts[opline->result.u.var].tmp_var.type = IS_LONG; /* shouldn't be necessary */
EG(error_reporting) = 0;
break;
case ZEND_END_SILENCE:
EG(error_reporting) = Ts[opline->op1.u.var].tmp_var.value.lval;
break;
case ZEND_QM_ASSIGN: {
zval *value = get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R);
Ts[opline->result.u.var].tmp_var = *value;
if (!free_op1) {
zval_copy_ctor(&Ts[opline->result.u.var].tmp_var);
}
}
break;
case ZEND_EXT_STMT:
if (!EG(no_extensions)) {
zend_llist_apply_with_argument(&zend_extensions, (void (*)(void *, void *)) zend_extension_statement_handler, op_array);
}
break;
case ZEND_EXT_FCALL_BEGIN:
if (!EG(no_extensions)) {
zend_llist_apply_with_argument(&zend_extensions, (void (*)(void *, void *)) zend_extension_fcall_begin_handler, op_array);
}
break;
case ZEND_EXT_FCALL_END:
if (!EG(no_extensions)) {
zend_llist_apply_with_argument(&zend_extensions, (void (*)(void *, void *)) zend_extension_fcall_end_handler, op_array);
}
break;
case ZEND_DECLARE_FUNCTION_OR_CLASS:
do_bind_function_or_class(opline, EG(function_table), EG(class_table));
break;
case ZEND_EXT_NOP:
case ZEND_NOP:
break;
default:
break;
}
opline++;
}
#if SUPPORT_INTERACTIVE
op_array->last_executed_op_number = opline-op_array->opcodes;
#endif
free_alloca(Ts);
}
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