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php-src/Zend/zend_execute.c

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2005 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.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> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#define ZEND_INTENSIVE_DEBUGGING 0
#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_constants.h"
#include "zend_extensions.h"
#include "zend_fast_cache.h"
#include "zend_ini.h"
#include "zend_exceptions.h"
#include "zend_vm.h"
#define _CONST_CODE 0
#define _TMP_CODE 1
#define _VAR_CODE 2
#define _UNUSED_CODE 3
#define _CV_CODE 4
typedef int (*incdec_t)(zval *);
#define get_zval_ptr(node, Ts, should_free, type) _get_zval_ptr(node, Ts, should_free, type TSRMLS_CC)
#define get_zval_ptr_ptr(node, Ts, should_free, type) _get_zval_ptr_ptr(node, Ts, should_free, type TSRMLS_CC)
#define get_obj_zval_ptr(node, Ts, should_free, type) _get_obj_zval_ptr(node, Ts, should_free, type TSRMLS_CC)
#define get_obj_zval_ptr_ptr(node, Ts, should_free, type) _get_obj_zval_ptr_ptr(node, Ts, should_free, type TSRMLS_CC)
/* Prototypes */
static void zend_extension_statement_handler(zend_extension *extension, zend_op_array *op_array TSRMLS_DC);
static void zend_extension_fcall_begin_handler(zend_extension *extension, zend_op_array *op_array TSRMLS_DC);
static void zend_extension_fcall_end_handler(zend_extension *extension, zend_op_array *op_array TSRMLS_DC);
#define RETURN_VALUE_USED(opline) (!((opline)->result.u.EA.type & EXT_TYPE_UNUSED))
#define EX_T(offset) (*(temp_variable *)((char *) EX(Ts) + offset))
#define T(offset) (*(temp_variable *)((char *) Ts + offset))
#define TEMP_VAR_STACK_LIMIT 2000
static inline void zend_pzval_unlock_func(zval *z, zend_free_op *should_free)
{
if (!--z->refcount) {
z->refcount = 1;
z->is_ref = 0;
should_free->var = z;
/* should_free->is_var = 1; */
} else {
should_free->var = 0;
if (z->is_ref && z->refcount == 1) {
z->is_ref = 0;
}
}
}
static inline void zend_pzval_unlock_free_func(zval *z)
{
if (!--z->refcount) {
zval_dtor(z);
safe_free_zval_ptr(z);
}
}
#define PZVAL_UNLOCK(z, f) zend_pzval_unlock_func(z, f)
#define PZVAL_UNLOCK_FREE(z) zend_pzval_unlock_free_func(z)
#define PZVAL_LOCK(z) (z)->refcount++
#define RETURN_VALUE_UNUSED(pzn) (((pzn)->u.EA.type & EXT_TYPE_UNUSED))
#define SELECTIVE_PZVAL_LOCK(pzv, pzn) if (!RETURN_VALUE_UNUSED(pzn)) { PZVAL_LOCK(pzv); }
#define AI_USE_PTR(ai) \
if ((ai).ptr_ptr) { \
(ai).ptr = *((ai).ptr_ptr); \
(ai).ptr_ptr = &((ai).ptr); \
} else { \
(ai).ptr = NULL; \
}
#define FREE_OP(should_free) \
if (should_free.var) { \
if ((long)should_free.var & 1L) { \
zval_dtor((zval*)((long)should_free.var & ~1L)); \
} else { \
zval_ptr_dtor(&should_free.var); \
} \
}
#define FREE_OP_IF_VAR(should_free) \
if (should_free.var != NULL && (((long)should_free.var & 1L) == 0)) { \
zval_ptr_dtor(&should_free.var); \
}
#define FREE_OP_VAR_PTR(should_free) \
if (should_free.var) { \
zval_ptr_dtor(&should_free.var); \
}
#define TMP_FREE(z) (zval*)(((long)(z)) | 1L)
#define IS_TMP_FREE(should_free) ((long)should_free.var & 1L)
#define INIT_PZVAL_COPY(z,v) \
(z)->value = (v)->value; \
(z)->type = (v)->type; \
(z)->refcount = 1; \
(z)->is_ref = 0;
#define MAKE_REAL_ZVAL_PTR(val) \
do { \
zval *_tmp; \
ALLOC_ZVAL(_tmp); \
_tmp->value = (val)->value; \
_tmp->type = (val)->type; \
_tmp->refcount = 1; \
_tmp->is_ref = 0; \
val = _tmp; \
} while (0)
/* End of zend_execute_locks.h */
#define CV_OF(i) (EG(current_execute_data)->CVs[i])
#define CV_DEF_OF(i) (EG(active_op_array)->vars[i])
ZEND_API zval** zend_get_compiled_variable_value(zend_execute_data *execute_data_ptr, zend_uint var)
{
return execute_data_ptr->CVs[var];
}
static inline void zend_get_cv_address(zend_compiled_variable *cv, zval ***ptr, temp_variable *Ts TSRMLS_DC)
{
zval *new_zval = &EG(uninitialized_zval);
new_zval->refcount++;
zend_hash_quick_update(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, &new_zval, sizeof(zval *), (void **)ptr);
}
static inline zval *_get_zval_ptr_tmp(znode *node, temp_variable *Ts, zend_free_op *should_free TSRMLS_DC)
{
return should_free->var = &T(node->u.var).tmp_var;
}
static inline zval *_get_zval_ptr_var(znode *node, temp_variable *Ts, zend_free_op *should_free TSRMLS_DC)
{
zval *ptr = T(node->u.var).var.ptr;
if (ptr) {
PZVAL_UNLOCK(ptr, should_free);
return ptr;
} else {
temp_variable *T = &T(node->u.var);
zval *str = T->str_offset.str;
/* string offset */
ALLOC_ZVAL(ptr);
T->str_offset.ptr = ptr;
should_free->var = ptr;
if (T->str_offset.str->type != IS_STRING
|| ((int)T->str_offset.offset<0)
|| (T->str_offset.str->value.str.len <= T->str_offset.offset)) {
zend_error(E_NOTICE, "Uninitialized string offset: %d", T->str_offset.offset);
ptr->value.str.val = STR_EMPTY_ALLOC();
ptr->value.str.len = 0;
} else {
char c = str->value.str.val[T->str_offset.offset];
ptr->value.str.val = estrndup(&c, 1);
ptr->value.str.len = 1;
}
PZVAL_UNLOCK_FREE(str);
ptr->refcount=1;
ptr->is_ref=1;
ptr->type = IS_STRING;
return ptr;
}
}
static inline zval *_get_zval_ptr_cv(znode *node, temp_variable *Ts, int type TSRMLS_DC)
{
zval ***ptr = &CV_OF(node->u.var);
if (!*ptr) {
zend_compiled_variable *cv = &CV_DEF_OF(node->u.var);
if (zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
switch (type) {
case BP_VAR_R:
case BP_VAR_UNSET:
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
/* break missing intentionally */
case BP_VAR_IS:
return &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
/* break missing intentionally */
case BP_VAR_W:
zend_get_cv_address(cv, ptr, Ts TSRMLS_CC);
break;
}
}
}
return **ptr;
}
static inline zval *_get_zval_ptr(znode *node, temp_variable *Ts, zend_free_op *should_free, int type TSRMLS_DC)
{
/* should_free->is_var = 0; */
switch (node->op_type) {
case IS_CONST:
should_free->var = 0;
return &node->u.constant;
break;
case IS_TMP_VAR:
should_free->var = TMP_FREE(&T(node->u.var).tmp_var);
return &T(node->u.var).tmp_var;
break;
case IS_VAR:
return _get_zval_ptr_var(node, Ts, should_free TSRMLS_CC);
break;
case IS_UNUSED:
should_free->var = 0;
return NULL;
break;
case IS_CV:
should_free->var = 0;
return _get_zval_ptr_cv(node, Ts, type TSRMLS_CC);
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
return NULL;
}
static inline zval **_get_zval_ptr_ptr_var(znode *node, temp_variable *Ts, zend_free_op *should_free TSRMLS_DC)
{
zval** ptr_ptr = T(node->u.var).var.ptr_ptr;
if (ptr_ptr) {
PZVAL_UNLOCK(*ptr_ptr, should_free);
} else {
/* string offset */
PZVAL_UNLOCK(T(node->u.var).str_offset.str, should_free);
}
return ptr_ptr;
}
static inline zval **_get_zval_ptr_ptr_cv(znode *node, temp_variable *Ts, int type TSRMLS_DC)
{
zval ***ptr = &CV_OF(node->u.var);
if (!*ptr) {
zend_compiled_variable *cv = &CV_DEF_OF(node->u.var);
if (zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
switch (type) {
case BP_VAR_R:
case BP_VAR_UNSET:
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
/* break missing intentionally */
case BP_VAR_IS:
return &EG(uninitialized_zval_ptr);
break;
case BP_VAR_RW:
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
/* break missing intentionally */
case BP_VAR_W:
zend_get_cv_address(cv, ptr, Ts TSRMLS_CC);
break;
}
}
}
return *ptr;
}
static inline zval **_get_zval_ptr_ptr(znode *node, temp_variable *Ts, zend_free_op *should_free, int type TSRMLS_DC)
{
if (node->op_type == IS_CV) {
should_free->var = 0;
return _get_zval_ptr_ptr_cv(node, Ts, type TSRMLS_CC);
} else if (node->op_type == IS_VAR) {
return _get_zval_ptr_ptr_var(node, Ts, should_free TSRMLS_CC);
} else {
should_free->var = 0;
return NULL;
}
}
static inline zval *_get_obj_zval_ptr_unused(TSRMLS_D)
{
if (EG(This)) {
return EG(This);
} else {
zend_error_noreturn(E_ERROR, "Using $this when not in object context");
return NULL;
}
}
static inline zval **_get_obj_zval_ptr_ptr(znode *op, temp_variable *Ts, zend_free_op *should_free, int type TSRMLS_DC)
{
if (op->op_type == IS_UNUSED) {
if (EG(This)) {
/* this should actually never be modified, _ptr_ptr is modified only when
the object is empty */
should_free->var = 0;
return &EG(This);
} else {
zend_error_noreturn(E_ERROR, "Using $this when not in object context");
}
}
return get_zval_ptr_ptr(op, Ts, should_free, type);
}
static inline zval **_get_obj_zval_ptr_ptr_unused(TSRMLS_D)
{
if (EG(This)) {
return &EG(This);
} else {
zend_error_noreturn(E_ERROR, "Using $this when not in object context");
return NULL;
}
}
static inline zval *_get_obj_zval_ptr(znode *op, temp_variable *Ts, zend_free_op *should_free, int type TSRMLS_DC)
{
if (op->op_type == IS_UNUSED) {
if (EG(This)) {
should_free->var = 0;
return EG(This);
} else {
zend_error_noreturn(E_ERROR, "Using $this when not in object context");
}
}
return get_zval_ptr(op, Ts, should_free, type);
}
static inline void zend_switch_free(zend_op *opline, temp_variable *Ts TSRMLS_DC)
{
switch (opline->op1.op_type) {
case IS_VAR:
if (!T(opline->op1.u.var).var.ptr_ptr) {
temp_variable *T = &T(opline->op1.u.var);
/* perform the equivalent of equivalent of a
* quick & silent get_zval_ptr, and FREE_OP
*/
PZVAL_UNLOCK_FREE(T->str_offset.str);
} else {
zval_ptr_dtor(&T(opline->op1.u.var).var.ptr);
if (opline->extended_value) { /* foreach() free */
zval_ptr_dtor(&T(opline->op1.u.var).var.ptr);
}
}
break;
case IS_TMP_VAR:
zendi_zval_dtor(T(opline->op1.u.var).tmp_var);
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
}
static void zend_assign_to_variable_reference(zval **variable_ptr_ptr, zval **value_ptr_ptr TSRMLS_DC)
{
zval *variable_ptr;
zval *value_ptr;
if (!value_ptr_ptr || !variable_ptr_ptr) {
zend_error_noreturn(E_ERROR, "Cannot create references to/from string offsets nor overloaded objects");
return;
}
variable_ptr = *variable_ptr_ptr;
value_ptr = *value_ptr_ptr;
if (variable_ptr == EG(error_zval_ptr) || value_ptr==EG(error_zval_ptr)) {
variable_ptr_ptr = &EG(uninitialized_zval_ptr);
} else if (variable_ptr != value_ptr) {
variable_ptr->refcount--;
if (variable_ptr->refcount==0) {
zendi_zval_dtor(*variable_ptr);
FREE_ZVAL(variable_ptr);
}
if (!PZVAL_IS_REF(value_ptr)) {
/* break it away */
value_ptr->refcount--;
if (value_ptr->refcount>0) {
ALLOC_ZVAL(*value_ptr_ptr);
**value_ptr_ptr = *value_ptr;
value_ptr = *value_ptr_ptr;
zendi_zval_copy_ctor(*value_ptr);
}
value_ptr->refcount = 1;
value_ptr->is_ref = 1;
}
*variable_ptr_ptr = value_ptr;
value_ptr->refcount++;
} else if (!variable_ptr->is_ref) {
if (variable_ptr_ptr == value_ptr_ptr) {
SEPARATE_ZVAL(variable_ptr_ptr);
} else if (variable_ptr==EG(uninitialized_zval_ptr)
|| variable_ptr->refcount>2) {
/* we need to separate */
variable_ptr->refcount -= 2;
ALLOC_ZVAL(*variable_ptr_ptr);
**variable_ptr_ptr = *variable_ptr;
zval_copy_ctor(*variable_ptr_ptr);
*value_ptr_ptr = *variable_ptr_ptr;
(*variable_ptr_ptr)->refcount = 2;
}
(*variable_ptr_ptr)->is_ref = 1;
}
}
static inline void make_real_object(zval **object_ptr TSRMLS_DC)
{
/* this should modify object only if it's empty */
if ((*object_ptr)->type == IS_NULL
|| ((*object_ptr)->type == IS_BOOL && (*object_ptr)->value.lval==0)
|| ((*object_ptr)->type == IS_STRING && (*object_ptr)->value.str.len == 0)) {
if (!PZVAL_IS_REF(*object_ptr)) {
SEPARATE_ZVAL(object_ptr);
}
zend_error(E_STRICT, "Creating default object from empty value");
object_init(*object_ptr);
}
}
static inline void zend_verify_arg_type(zend_function *zf, zend_uint arg_num, zval *arg TSRMLS_DC)
{
zend_arg_info *cur_arg_info;
zend_execute_data *ptr = EG(current_execute_data)->prev_execute_data;
if (!zf->common.arg_info
|| arg_num>zf->common.num_args) {
return;
}
cur_arg_info = &zf->common.arg_info[arg_num-1];
if (cur_arg_info->class_name) {
if (!arg) {
if(ptr && ptr->op_array) {
zend_error_noreturn(E_ERROR, "Argument %d must be an object of class %s, called in %s on line %d and defined", arg_num, cur_arg_info->class_name, ptr->op_array->filename, ptr->opline->lineno);
} else {
zend_error_noreturn(E_ERROR, "Argument %d must be an object of class %s", arg_num, cur_arg_info->class_name);
}
}
switch (Z_TYPE_P(arg)) {
case IS_NULL:
if (!cur_arg_info->allow_null) {
if(ptr && ptr->op_array) {
zend_error_noreturn(E_ERROR, "Argument %d must not be null, called in %s on line %d and defined", arg_num, ptr->op_array->filename, ptr->opline->lineno);
} else {
zend_error_noreturn(E_ERROR, "Argument %d must not be null", arg_num);
}
}
break;
case IS_OBJECT: {
zend_class_entry *ce = zend_fetch_class(cur_arg_info->class_name, cur_arg_info->class_name_len, ZEND_FETCH_CLASS_AUTO TSRMLS_CC);
if (!instanceof_function(Z_OBJCE_P(arg), ce TSRMLS_CC)) {
char *error_msg;
if (ce->ce_flags & ZEND_ACC_INTERFACE) {
error_msg = "implement interface";
} else {
error_msg = "be an instance of";
}
if(ptr && ptr->op_array) {
zend_error_noreturn(E_ERROR, "Argument %d must %s %s, called in %s on line %d and defined", arg_num, error_msg, ce->name, ptr->op_array->filename, ptr->opline->lineno);
} else {
zend_error_noreturn(E_ERROR, "Argument %d must %s %s", arg_num, error_msg, ce->name);
}
}
}
break;
default:
if(ptr && ptr->op_array) {
zend_error_noreturn(E_ERROR, "Argument %d must be an object of class %s, called in %s on line %d and defined", arg_num, cur_arg_info->class_name, ptr->op_array->filename, ptr->opline->lineno);
} else {
zend_error_noreturn(E_ERROR, "Argument %d must be an object of class %s", arg_num, cur_arg_info->class_name);
}
break;
}
} else if (cur_arg_info->array_type_hint) {
if (!arg) {
if(ptr && ptr->op_array) {
zend_error_noreturn(E_ERROR, "Argument %d must be an array, called in %s on line %d and defined", arg_num, ptr->op_array->filename, ptr->opline->lineno);
} else {
zend_error_noreturn(E_ERROR, "Argument %d must be an array", arg_num);
}
}
switch (Z_TYPE_P(arg)) {
case IS_NULL:
if (!cur_arg_info->allow_null) {
if(ptr && ptr->op_array) {
zend_error_noreturn(E_ERROR, "Argument %d must not be null, called in %s on line %d and defined", arg_num, ptr->op_array->filename, ptr->opline->lineno);
} else {
zend_error_noreturn(E_ERROR, "Argument %d must not be null", arg_num);
}
}
break;
case IS_ARRAY:
break;
default:
if(ptr && ptr->op_array) {
zend_error_noreturn(E_ERROR, "Argument %d must be an array, called in %s on line %d and defined", arg_num, ptr->op_array->filename, ptr->opline->lineno);
} else {
zend_error_noreturn(E_ERROR, "Argument %d must be an array", arg_num);
}
break;
}
}
}
static inline void zend_assign_to_object(znode *result, zval **object_ptr, znode *op2, znode *value_op, temp_variable *Ts, int opcode TSRMLS_DC)
{
zval *object;
zend_free_op free_op2, free_value;
zval *property_name = get_zval_ptr(op2, Ts, &free_op2, BP_VAR_R);
zval *value = get_zval_ptr(value_op, Ts, &free_value, BP_VAR_R);
zval **retval = &T(result->u.var).var.ptr;
make_real_object(object_ptr TSRMLS_CC); /* this should modify object only if it's empty */
object = *object_ptr;
if (object->type != IS_OBJECT || (opcode == ZEND_ASSIGN_OBJ && !Z_OBJ_HT_P(object)->write_property)) {
zend_error(E_WARNING, "Attempt to assign property of non-object");
FREE_OP(free_op2);
if (!RETURN_VALUE_UNUSED(result)) {
*retval = EG(uninitialized_zval_ptr);
PZVAL_LOCK(*retval);
}
FREE_OP(free_value);
return;
}
/* here we are sure we are dealing with an object */
/* separate our value if necessary */
if (EG(ze1_compatibility_mode) && Z_TYPE_P(value) == IS_OBJECT) {
zval *orig_value = value;
char *class_name;
zend_uint class_name_len;
int dup;
ALLOC_ZVAL(value);
*value = *orig_value;
value->is_ref = 0;
value->refcount = 0;
dup = zend_get_object_classname(orig_value, &class_name, &class_name_len TSRMLS_CC);
if (Z_OBJ_HANDLER_P(value, clone_obj) == NULL) {
zend_error_noreturn(E_ERROR, "Trying to clone an uncloneable object of class %s", class_name);
}
zend_error(E_STRICT, "Implicit cloning object of class '%s' because of 'zend.ze1_compatibility_mode'", class_name);
value->value.obj = Z_OBJ_HANDLER_P(orig_value, clone_obj)(orig_value TSRMLS_CC);
if(!dup) {
efree(class_name);
}
} else if (value_op->op_type == IS_TMP_VAR) {
zval *orig_value = value;
ALLOC_ZVAL(value);
*value = *orig_value;
value->is_ref = 0;
value->refcount = 0;
} else if (value_op->op_type == IS_CONST) {
zval *orig_value = value;
ALLOC_ZVAL(value);
*value = *orig_value;
value->is_ref = 0;
value->refcount = 0;
zval_copy_ctor(value);
}
value->refcount++;
if (opcode == ZEND_ASSIGN_OBJ) {
if (IS_TMP_FREE(free_op2)) {
MAKE_REAL_ZVAL_PTR(property_name);
}
Z_OBJ_HT_P(object)->write_property(object, property_name, value TSRMLS_CC);
} else {
/* Note: property_name in this case is really the array index! */
if (!Z_OBJ_HT_P(object)->write_dimension) {
zend_error_noreturn(E_ERROR, "Cannot use object as array");
}
if (IS_TMP_FREE(free_op2)) {
MAKE_REAL_ZVAL_PTR(property_name);
}
Z_OBJ_HT_P(object)->write_dimension(object, property_name, value TSRMLS_CC);
}
if (result && !RETURN_VALUE_UNUSED(result)) {
T(result->u.var).var.ptr = value;
T(result->u.var).var.ptr_ptr = &T(result->u.var).var.ptr; /* this is so that we could use it in FETCH_DIM_R, etc. - see bug #27876 */
PZVAL_LOCK(value);
}
if (IS_TMP_FREE(free_op2)) {
zval_ptr_dtor(&property_name);
} else {
FREE_OP(free_op2);
}
zval_ptr_dtor(&value);
FREE_OP_IF_VAR(free_value);
}
static inline void zend_assign_to_variable(znode *result, znode *op1, znode *op2, zval *value, int type, temp_variable *Ts TSRMLS_DC)
{
zend_free_op free_op1;
zval **variable_ptr_ptr = get_zval_ptr_ptr(op1, Ts, &free_op1, BP_VAR_W);
zval *variable_ptr;
if (!variable_ptr_ptr) {
temp_variable *T = &T(op1->u.var);
if (T->str_offset.str->type == IS_STRING) do {
zval tmp;
zval *final_value = value;
if (((int)T->str_offset.offset < 0)) {
zend_error(E_WARNING, "Illegal string offset: %d", T->str_offset.offset);
break;
}
if (T->str_offset.offset >= T->str_offset.str->value.str.len) {
zend_uint i;
if (T->str_offset.str->value.str.len==0) {
STR_FREE(T->str_offset.str->value.str.val);
T->str_offset.str->value.str.val = (char *) emalloc(T->str_offset.offset+1+1);
} else {
T->str_offset.str->value.str.val = (char *) erealloc(T->str_offset.str->value.str.val, T->str_offset.offset+1+1);
}
for (i=T->str_offset.str->value.str.len; i<T->str_offset.offset; i++) {
T->str_offset.str->value.str.val[i] = ' ';
}
T->str_offset.str->value.str.val[T->str_offset.offset+1] = 0;
T->str_offset.str->value.str.len = T->str_offset.offset+1;
}
if (value->type!=IS_STRING) {
tmp = *value;
if (op2->op_type & (IS_VAR|IS_CV)) {
zval_copy_ctor(&tmp);
}
convert_to_string(&tmp);
final_value = &tmp;
}
T->str_offset.str->value.str.val[T->str_offset.offset] = final_value->value.str.val[0];
if (op2->op_type == IS_TMP_VAR) {
if (final_value == &T(op2->u.var).tmp_var) {
/* we can safely free final_value here
* because separation is done only
* in case op2->op_type == IS_VAR */
STR_FREE(final_value->value.str.val);
}
}
if (final_value == &tmp) {
zval_dtor(final_value);
}
/*
* the value of an assignment to a string offset is undefined
T(result->u.var).var = &T->str_offset.str;
*/
} while (0);
/* zval_ptr_dtor(&T->str_offset.str); Nuke this line if it doesn't cause a leak */
/* T(result->u.var).var.ptr_ptr = &EG(uninitialized_zval_ptr); */
if (!RETURN_VALUE_UNUSED(result)) {
T(result->u.var).var.ptr_ptr = &value;
PZVAL_LOCK(*T(result->u.var).var.ptr_ptr);
AI_USE_PTR(T(result->u.var).var);
}
FREE_OP_VAR_PTR(free_op1);
return;
}
variable_ptr = *variable_ptr_ptr;
if (variable_ptr == EG(error_zval_ptr)) {
if (result && !RETURN_VALUE_UNUSED(result)) {
T(result->u.var).var.ptr_ptr = &EG(uninitialized_zval_ptr);
PZVAL_LOCK(*T(result->u.var).var.ptr_ptr);
AI_USE_PTR(T(result->u.var).var);
}
if (type==IS_TMP_VAR) {
zval_dtor(value);
}
FREE_OP_VAR_PTR(free_op1);
return;
}
if(Z_TYPE_P(variable_ptr) == IS_OBJECT && Z_OBJ_HANDLER_P(variable_ptr, set)) {
/* TODO? ze1_compatibility_mode support */
Z_OBJ_HANDLER_P(variable_ptr, set)(variable_ptr_ptr, value TSRMLS_CC);
goto done_setting_var;
}
if (EG(ze1_compatibility_mode) && Z_TYPE_P(value) == IS_OBJECT) {
char *class_name;
zend_uint class_name_len;
int dup;
dup = zend_get_object_classname(value, &class_name, &class_name_len TSRMLS_CC);
if (Z_OBJ_HANDLER_P(value, clone_obj) == NULL) {
zend_error_noreturn(E_ERROR, "Trying to clone an uncloneable object of class %s", class_name);
} else if (PZVAL_IS_REF(variable_ptr)) {
if (variable_ptr != value) {
zend_uint refcount = variable_ptr->refcount;
zval garbage;
if (type != IS_TMP_VAR) {
value->refcount++;
}
garbage = *variable_ptr;
*variable_ptr = *value;
variable_ptr->refcount = refcount;
variable_ptr->is_ref = 1;
zend_error(E_STRICT, "Implicit cloning object of class '%s' because of 'zend.ze1_compatibility_mode'", class_name);
variable_ptr->value.obj = Z_OBJ_HANDLER_P(value, clone_obj)(value TSRMLS_CC);
if (type != IS_TMP_VAR) {
value->refcount--;
}
zendi_zval_dtor(garbage);
}
} else {
if (variable_ptr != value) {
value->refcount++;
variable_ptr->refcount--;
if (variable_ptr->refcount == 0) {
zendi_zval_dtor(*variable_ptr);
} else {
ALLOC_ZVAL(variable_ptr);
*variable_ptr_ptr = variable_ptr;
}
*variable_ptr = *value;
INIT_PZVAL(variable_ptr);
zend_error(E_STRICT, "Implicit cloning object of class '%s' because of 'zend.ze1_compatibility_mode'", class_name);
variable_ptr->value.obj = Z_OBJ_HANDLER_P(value, clone_obj)(value TSRMLS_CC);
zval_ptr_dtor(&value);
}
}
if (!dup) {
efree(class_name);
}
} else if (PZVAL_IS_REF(variable_ptr)) {
if (variable_ptr!=value) {
zend_uint refcount = variable_ptr->refcount;
zval garbage;
if (type!=IS_TMP_VAR) {
value->refcount++;
}
garbage = *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);
value->refcount--;
}
zendi_zval_dtor(garbage);
}
} else {
variable_ptr->refcount--;
if (variable_ptr->refcount==0) {
switch (type) {
case IS_CV:
case IS_VAR:
/* break missing intentionally */
case IS_CONST:
if (variable_ptr==value) {
variable_ptr->refcount++;
} else if (PZVAL_IS_REF(value)) {
zval tmp;
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;
EMPTY_SWITCH_DEFAULT_CASE()
}
} else { /* we need to split */
switch (type) {
case IS_CV:
case IS_VAR:
/* break missing intentionally */
case IS_CONST:
if (PZVAL_IS_REF(value) && value->refcount > 0) {
ALLOC_ZVAL(variable_ptr);
*variable_ptr_ptr = variable_ptr;
*variable_ptr = *value;
zval_copy_ctor(variable_ptr);
variable_ptr->refcount=1;
break;
}
*variable_ptr_ptr = value;
value->refcount++;
break;
case IS_TMP_VAR:
ALLOC_ZVAL(*variable_ptr_ptr);
value->refcount=1;
**variable_ptr_ptr = *value;
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
}
(*variable_ptr_ptr)->is_ref=0;
}
done_setting_var:
if (result && !RETURN_VALUE_UNUSED(result)) {
T(result->u.var).var.ptr_ptr = variable_ptr_ptr;
PZVAL_LOCK(*variable_ptr_ptr);
AI_USE_PTR(T(result->u.var).var);
}
FREE_OP_VAR_PTR(free_op1);
}
static inline void zend_receive(zval **variable_ptr_ptr, zval *value TSRMLS_DC)
{
zval *variable_ptr = *variable_ptr_ptr;
if (EG(ze1_compatibility_mode) && Z_TYPE_P(value) == IS_OBJECT) {
char *class_name;
zend_uint class_name_len;
int dup;
dup = zend_get_object_classname(value, &class_name, &class_name_len TSRMLS_CC);
if (Z_OBJ_HANDLER_P(value, clone_obj) == NULL) {
zend_error_noreturn(E_ERROR, "Trying to clone an uncloneable object of class %s", class_name);
} else {
variable_ptr->refcount--;
ALLOC_ZVAL(variable_ptr);
*variable_ptr_ptr = variable_ptr;
*variable_ptr = *value;
INIT_PZVAL(variable_ptr);
zend_error(E_STRICT, "Implicit cloning object of class '%s' because of 'zend.ze1_compatibility_mode'", class_name);
variable_ptr->value.obj = Z_OBJ_HANDLER_P(value, clone_obj)(value TSRMLS_CC);
}
if (!dup) {
efree(class_name);
}
} else {
variable_ptr->refcount--;
*variable_ptr_ptr = value;
value->refcount++;
}
}
/* Utility Functions for Extensions */
static void zend_extension_statement_handler(zend_extension *extension, zend_op_array *op_array TSRMLS_DC)
{
if (extension->statement_handler) {
extension->statement_handler(op_array);
}
}
static void zend_extension_fcall_begin_handler(zend_extension *extension, zend_op_array *op_array TSRMLS_DC)
{
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 TSRMLS_DC)
{
if (extension->fcall_end_handler) {
extension->fcall_end_handler(op_array);
}
}
static inline HashTable *zend_get_target_symbol_table(zend_op *opline, temp_variable *Ts, int type, zval *variable TSRMLS_DC)
{
switch (opline->op2.u.EA.type) {
case ZEND_FETCH_LOCAL:
return EG(active_symbol_table);
break;
case ZEND_FETCH_GLOBAL:
case ZEND_FETCH_GLOBAL_LOCK:
return &EG(symbol_table);
break;
case ZEND_FETCH_STATIC:
if (!EG(active_op_array)->static_variables) {
ALLOC_HASHTABLE(EG(active_op_array)->static_variables);
zend_hash_init(EG(active_op_array)->static_variables, 2, NULL, ZVAL_PTR_DTOR, 0);
}
return EG(active_op_array)->static_variables;
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
return NULL;
}
static inline zval **zend_fetch_dimension_address_inner(HashTable *ht, zval *dim, int type TSRMLS_DC)
{
zval **retval;
char *offset_key;
int offset_key_length;
switch (dim->type) {
case IS_NULL:
offset_key = "";
offset_key_length = 0;
goto fetch_string_dim;
case IS_STRING:
offset_key = dim->value.str.val;
offset_key_length = dim->value.str.len;
fetch_string_dim:
if (zend_symtable_find(ht, offset_key, offset_key_length+1, (void **) &retval) == FAILURE) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE, "Undefined index: %s", offset_key);
/* break missing intentionally */
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval_ptr);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined index: %s", offset_key);
/* break missing intentionally */
case BP_VAR_W: {
zval *new_zval = &EG(uninitialized_zval);
new_zval->refcount++;
zend_symtable_update(ht, offset_key, offset_key_length+1, &new_zval, sizeof(zval *), (void **) &retval);
}
break;
}
}
break;
case IS_RESOURCE:
zend_error(E_STRICT, "Resource ID#%ld used as offset, casting to integer (%ld)", dim->value.lval, dim->value.lval);
/* Fall Through */
case IS_DOUBLE:
case IS_BOOL:
case IS_LONG: {
long index;
if (dim->type == IS_DOUBLE) {
index = (long)dim->value.dval;
} else {
index = dim->value.lval;
}
if (zend_hash_index_find(ht, index, (void **) &retval) == FAILURE) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE,"Undefined offset: %ld", index);
/* break missing intentionally */
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval_ptr);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined offset: %ld", 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");
switch (type) {
case BP_VAR_R:
case BP_VAR_IS:
case BP_VAR_UNSET:
retval = &EG(uninitialized_zval_ptr);
break;
default:
retval = &EG(error_zval_ptr);
break;
}
break;
}
return retval;
}
static void zend_fetch_dimension_address(temp_variable *result, zval **container_ptr, zval *dim, int dim_is_tmp_var, int type TSRMLS_DC)
{
zval *container;
if (!container_ptr) {
zend_error_noreturn(E_ERROR, "Cannot use string offset as an array");
}
container = *container_ptr;
if (container == EG(error_zval_ptr)) {
if (result) {
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(*result->var.ptr_ptr);
if (type == BP_VAR_R || type == BP_VAR_IS) {
AI_USE_PTR(result->var);
}
}
return;
}
if (container->type==IS_NULL
|| (container->type==IS_BOOL && container->value.lval==0)
|| (container->type==IS_STRING && container->value.str.len==0)) {
switch (type) {
case BP_VAR_RW:
case BP_VAR_W:
if (!PZVAL_IS_REF(container)) {
SEPARATE_ZVAL(container_ptr);
container = *container_ptr;
}
array_init(container);
break;
}
}
switch (container->type) {
zval **retval;
case IS_ARRAY:
if ((type==BP_VAR_W || type==BP_VAR_RW) && container->refcount>1 && !PZVAL_IS_REF(container)) {
SEPARATE_ZVAL(container_ptr);
container = *container_ptr;
}
if (dim == NULL) {
zval *new_zval = &EG(uninitialized_zval);
new_zval->refcount++;
if (zend_hash_next_index_insert(container->value.ht, &new_zval, sizeof(zval *), (void **) &retval) == FAILURE) {
zend_error(E_WARNING, "Cannot add element to the array as the next element is already occupied");
retval = &EG(error_zval_ptr);
new_zval->refcount--;
}
} else {
retval = zend_fetch_dimension_address_inner(container->value.ht, dim, type TSRMLS_CC);
}
if (result) {
result->var.ptr_ptr = retval;
PZVAL_LOCK(*result->var.ptr_ptr);
}
break;
case IS_NULL: {
/* for read-mode only */
if (result) {
result->var.ptr_ptr = &EG(uninitialized_zval_ptr);
PZVAL_LOCK(*result->var.ptr_ptr);
}
if (type==BP_VAR_W || type==BP_VAR_RW) {
zend_error(E_WARNING, "Cannot use a NULL value as an array");
}
break;
}
case IS_STRING: {
zval tmp;
if (dim == NULL) {
zend_error_noreturn(E_ERROR, "[] operator not supported for strings");
}
if (dim->type != IS_LONG) {
tmp = *dim;
zval_copy_ctor(&tmp);
convert_to_long(&tmp);
dim = &tmp;
}
switch (type) {
case BP_VAR_R:
case BP_VAR_IS:
case BP_VAR_UNSET:
/* do nothing... */
break;
default:
SEPARATE_ZVAL_IF_NOT_REF(container_ptr);
break;
}
if (result) {
container = *container_ptr;
result->str_offset.str = container;
PZVAL_LOCK(container);
result->str_offset.offset = dim->value.lval;
result->var.ptr_ptr = NULL;
if (type == BP_VAR_R || type == BP_VAR_IS) {
AI_USE_PTR(result->var);
}
}
return;
}
break;
case IS_OBJECT:
if (!Z_OBJ_HT_P(container)->read_dimension) {
zend_error_noreturn(E_ERROR, "Cannot use object as array");
} else {
zval *overloaded_result;
if (dim_is_tmp_var) {
zval *orig = dim;
MAKE_REAL_ZVAL_PTR(dim);
ZVAL_NULL(orig);
}
overloaded_result = Z_OBJ_HT_P(container)->read_dimension(container, dim, type TSRMLS_CC);
if (overloaded_result) {
switch (type) {
case BP_VAR_RW:
case BP_VAR_W:
if (overloaded_result->type != IS_OBJECT
&& !overloaded_result->is_ref) {
zend_error_noreturn(E_ERROR, "Objects used as arrays in post/pre increment/decrement must return values by reference");
}
break;
}
retval = &overloaded_result;
} else {
retval = &EG(error_zval_ptr);
}
if (result) {
result->var.ptr_ptr = retval;
AI_USE_PTR(result->var);
PZVAL_LOCK(*result->var.ptr_ptr);
} else if ((*retval)->refcount == 0) {
/* Destroy unused result from offsetGet() magic method */
(*retval)->refcount = 1;
zval_ptr_dtor(retval);
}
if (dim_is_tmp_var) {
zval_ptr_dtor(&dim);
}
return;
}
break;
default: {
switch (type) {
case BP_VAR_UNSET:
zend_error(E_WARNING, "Cannot unset offset in a non-array variable");
/* break missing intentionally */
case BP_VAR_R:
case BP_VAR_IS:
retval = &EG(uninitialized_zval_ptr);
break;
default:
retval = &EG(error_zval_ptr);
break;
}
if (result) {
result->var.ptr_ptr = retval;
PZVAL_LOCK(*result->var.ptr_ptr);
}
if (type==BP_VAR_W || type==BP_VAR_RW) {
zend_error(E_WARNING, "Cannot use a scalar value as an array");
}
}
break;
}
if (result && (type == BP_VAR_R || type == BP_VAR_IS)) {
AI_USE_PTR(result->var);
}
}
static void zend_fetch_property_address(temp_variable *result, zval **container_ptr, zval *prop_ptr, int type TSRMLS_DC)
{
zval *container;
container = *container_ptr;
if (container == EG(error_zval_ptr)) {
if (result) {
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(*result->var.ptr_ptr);
}
return;
}
/* this should modify object only if it's empty */
if (container->type == IS_NULL
|| (container->type == IS_BOOL && container->value.lval==0)
|| (container->type == IS_STRING && container->value.str.len == 0)) {
switch (type) {
case BP_VAR_RW:
case BP_VAR_W:
if (!PZVAL_IS_REF(container)) {
SEPARATE_ZVAL(container_ptr);
container = *container_ptr;
}
object_init(container);
break;
}
}
if (container->type != IS_OBJECT) {
if (result) {
if (type == BP_VAR_R || type == BP_VAR_IS) {
result->var.ptr_ptr = &EG(uninitialized_zval_ptr);
} else {
result->var.ptr_ptr = &EG(error_zval_ptr);
}
PZVAL_LOCK(*result->var.ptr_ptr);
}
return;
}
if ((type==BP_VAR_W || type==BP_VAR_RW) && container->refcount>1 && !PZVAL_IS_REF(container)) {
SEPARATE_ZVAL(container_ptr);
container = *container_ptr;
}
if (Z_OBJ_HT_P(container)->get_property_ptr_ptr) {
zval **ptr_ptr = Z_OBJ_HT_P(container)->get_property_ptr_ptr(container, prop_ptr TSRMLS_CC);
if(NULL == ptr_ptr) {
zval *ptr;
if (Z_OBJ_HT_P(container)->read_property &&
(ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, BP_VAR_W TSRMLS_CC)) != NULL) {
if (result) {
result->var.ptr = ptr;
result->var.ptr_ptr = &result->var.ptr;
}
} else {
zend_error(E_ERROR, "Cannot access undefined property for object with overloaded property access");
}
} else if (result) {
result->var.ptr_ptr = ptr_ptr;
}
} else if (Z_OBJ_HT_P(container)->read_property) {
if (result) {
result->var.ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, BP_VAR_W TSRMLS_CC);
result->var.ptr_ptr = &result->var.ptr;
}
} else {
zend_error(E_WARNING, "This object doesn't support property references");
if (result) {
result->var.ptr_ptr = &EG(error_zval_ptr);
}
}
if (result) {
PZVAL_LOCK(*result->var.ptr_ptr);
}
}
static inline zend_brk_cont_element* zend_brk_cont(zval *nest_levels_zval, int array_offset, zend_op_array *op_array, temp_variable *Ts TSRMLS_DC)
{
zval tmp;
int 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;
do {
if (array_offset==-1) {
zend_error_noreturn(E_ERROR, "Cannot break/continue %d level%s", original_nest_levels, (original_nest_levels == 1) ? "" : "s");
}
jmp_to = &op_array->brk_cont_array[array_offset];
if (nest_levels>1) {
zend_op *brk_opline = &op_array->opcodes[jmp_to->brk];
switch (brk_opline->opcode) {
case ZEND_SWITCH_FREE:
zend_switch_free(brk_opline, Ts TSRMLS_CC);
break;
case ZEND_FREE:
zendi_zval_dtor(T(brk_opline->op1.u.var).tmp_var);
break;
}
}
array_offset = jmp_to->parent;
} while (--nest_levels > 0);
return jmp_to;
}
#if ZEND_INTENSIVE_DEBUGGING
#define CHECK_SYMBOL_TABLES() \
zend_hash_apply(&EG(symbol_table), (apply_func_t) zend_check_symbol TSRMLS_CC); \
if (&EG(symbol_table)!=EG(active_symbol_table)) { \
zend_hash_apply(EG(active_symbol_table), (apply_func_t) zend_check_symbol TSRMLS_CC); \
}
static int zend_check_symbol(zval **pz TSRMLS_DC)
{
if (Z_TYPE_PP(pz) > 9) {
fprintf(stderr, "Warning! %x has invalid type!\n", *pz);
} else if (Z_TYPE_PP(pz) == IS_ARRAY) {
zend_hash_apply(Z_ARRVAL_PP(pz), (apply_func_t) zend_check_symbol TSRMLS_CC);
} else if (Z_TYPE_PP(pz) == IS_OBJECT) {
/* OBJ-TBI - doesn't support new object model! */
zend_hash_apply(Z_OBJPROP_PP(pz), (apply_func_t) zend_check_symbol TSRMLS_CC);
}
return 0;
}
#else
#define CHECK_SYMBOL_TABLES()
#endif
ZEND_API opcode_handler_t *zend_opcode_handlers;
ZEND_API void execute_internal(zend_execute_data *execute_data_ptr, int return_value_used TSRMLS_DC)
{
zval **return_value_ptr = &(*(temp_variable *)((char *) execute_data_ptr->Ts + execute_data_ptr->opline->result.u.var)).var.ptr;
((zend_internal_function *) execute_data_ptr->function_state.function)->handler(execute_data_ptr->opline->extended_value, *return_value_ptr, execute_data_ptr->function_state.function->common.return_reference?return_value_ptr:NULL, execute_data_ptr->object, return_value_used TSRMLS_CC);
}
#define ZEND_VM_NEXT_OPCODE() \
CHECK_SYMBOL_TABLES() \
EX(opline)++; \
ZEND_VM_CONTINUE()
#define ZEND_VM_SET_OPCODE(new_op) \
CHECK_SYMBOL_TABLES() \
EX(opline) = new_op
#define ZEND_VM_INC_OPCODE() \
if (!EG(exception)) { \
CHECK_SYMBOL_TABLES() \
EX(opline)++; \
}
#define ZEND_VM_RETURN_FROM_EXECUTE_LOOP() \
free_alloca(EX(CVs)); \
if (EX(op_array)->T < TEMP_VAR_STACK_LIMIT) { \
free_alloca(EX(Ts)); \
} else { \
efree(EX(Ts)); \
} \
EG(in_execution) = EX(original_in_execution); \
EG(current_execute_data) = EX(prev_execute_data); \
ZEND_VM_RETURN()
#define ZEND_VM_CONTINUE_JMP() \
ZEND_VM_CONTINUE()
#include "zend_vm_execute.h"
ZEND_API int zend_set_user_opcode_handler(zend_uchar opcode, opcode_handler_t handler)
{
if (opcode != ZEND_USER_OPCODE) {
zend_user_opcodes[opcode] = ZEND_USER_OPCODE;
zend_user_opcode_handlers[opcode] = handler;
return SUCCESS;
}
return FAILURE;
}
ZEND_API opcode_handler_t zend_get_user_opcode_handler(zend_uchar opcode)
{
return zend_user_opcode_handlers[opcode];
}
ZEND_API zval *zend_get_zval_ptr(znode *node, temp_variable *Ts, zend_free_op *should_free, int type TSRMLS_DC) {
return get_zval_ptr(node, Ts, should_free, type);
}
ZEND_API zval **zend_get_zval_ptr_ptr(znode *node, temp_variable *Ts, zend_free_op *should_free, int type TSRMLS_DC) {
return get_zval_ptr_ptr(node, Ts, should_free, type);
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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