/
zend_execute.c
4045 lines (3485 loc) · 126 KB
/
zend_execute.c
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2003 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 at through the world-wide-web at |
| 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> |
+----------------------------------------------------------------------+
*/
#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_execute_locks.h"
#include "zend_ini.h"
#define get_zval_ptr(node, Ts, should_free, type) _get_zval_ptr(node, Ts, should_free TSRMLS_CC)
#define get_zval_ptr_ptr(node, Ts, type) _get_zval_ptr_ptr(node, Ts TSRMLS_CC)
/* Prototypes */
static void zend_fetch_var_address(zend_op *opline, temp_variable *Ts, int type TSRMLS_DC);
static void zend_fetch_dimension_address(znode *result, znode *op1, znode *op2, temp_variable *Ts, int type TSRMLS_DC);
static void zend_fetch_property_address(znode *result, znode *op1, znode *op2, temp_variable *Ts, int type TSRMLS_DC);
static void zend_fetch_dimension_address_from_tmp_var(znode *result, znode *op1, znode *op2, temp_variable *Ts TSRMLS_DC);
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))
static inline zval *_get_zval_ptr(znode *node, temp_variable *Ts, zval **should_free TSRMLS_DC)
{
switch (node->op_type) {
case IS_CONST:
*should_free = 0;
return &node->u.constant;
break;
case IS_TMP_VAR:
return *should_free = &T(node->u.var).tmp_var;
break;
case IS_VAR:
if (T(node->u.var).var.ptr) {
PZVAL_UNLOCK(T(node->u.var).var.ptr);
*should_free = 0;
return T(node->u.var).var.ptr;
} else {
*should_free = &T(node->u.var).tmp_var;
switch (T(node->u.var).EA.type) {
case IS_STRING_OFFSET: {
temp_variable *T = &T(node->u.var);
zval *str = T->EA.data.str_offset.str;
if (T->EA.data.str_offset.str->type != IS_STRING
|| (T->EA.data.str_offset.offset<0)
|| (T->EA.data.str_offset.str->value.str.len <= T->EA.data.str_offset.offset)) {
zend_error(E_NOTICE, "Uninitialized string offset: %d", T->EA.data.str_offset.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.data.str_offset.offset];
T->tmp_var.value.str.val = estrndup(&c, 1);
T->tmp_var.value.str.len = 1;
}
PZVAL_UNLOCK(str);
T->tmp_var.refcount=1;
T->tmp_var.is_ref=1;
T->tmp_var.type = IS_STRING;
return &T->tmp_var;
}
break;
}
}
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
return NULL;
}
static inline zval **_get_zval_ptr_ptr(znode *node, temp_variable *Ts TSRMLS_DC)
{
if (node->op_type==IS_VAR) {
if (T(node->u.var).var.ptr_ptr) {
PZVAL_UNLOCK(*T(node->u.var).var.ptr_ptr);
} else if (T(node->u.var).EA.type==IS_STRING_OFFSET) {
PZVAL_UNLOCK(T(node->u.var).EA.data.str_offset.str);
}
return T(node->u.var).var.ptr_ptr;
} else {
return NULL;
}
}
static inline zval **zend_fetch_property_address_inner(zval *object, znode *op2, temp_variable *Ts, int type TSRMLS_DC)
{
zval *prop_ptr = get_zval_ptr(op2, Ts, &EG(free_op2), BP_VAR_R);
zval **retval = NULL;
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 (Z_OBJ_HT_P(object)->get_property_ptr != NULL) {
retval = Z_OBJ_HT_P(object)->get_property_ptr(object, prop_ptr TSRMLS_CC);
}
if (retval == NULL) {
zend_error(E_WARNING, "This object doesn't support property references");
retval = &EG(error_zval_ptr);
}
if (prop_ptr == &tmp) {
zval_dtor(prop_ptr);
}
FREE_OP(Ts, op2, EG(free_op2));
return retval;
}
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) {
get_zval_ptr(&opline->op1, Ts, &EG(free_op1), BP_VAR_R);
FREE_OP(Ts, &opline->op1, EG(free_op1));
} 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()
}
}
void zend_assign_to_variable_reference(znode *result, zval **variable_ptr_ptr, zval **value_ptr_ptr, temp_variable *Ts TSRMLS_DC)
{
zval *variable_ptr;
zval *value_ptr;
if (!value_ptr_ptr || !variable_ptr_ptr) {
zend_error(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==&EG(uninitialized_zval) || variable_ptr!=value_ptr) { */
} else if (variable_ptr_ptr != value_ptr_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->refcount>1) { /* we need to break away */
SEPARATE_ZVAL(variable_ptr_ptr);
}
(*variable_ptr_ptr)->is_ref = 1;
}
if (result && !(result->u.EA.type & EXT_TYPE_UNUSED)) {
T(result->u.var).var.ptr_ptr = variable_ptr_ptr;
SELECTIVE_PZVAL_LOCK(*variable_ptr_ptr, result);
AI_USE_PTR(T(result->u.var).var);
}
}
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_NOTICE, "Creating default object from empty value");
object_init(*object_ptr);
}
}
static inline zval **get_obj_zval_ptr_ptr(znode *op, temp_variable *Ts, 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 */
return &EG(This);
} else {
zend_error(E_ERROR, "Using $this when not in object context");
}
}
return get_zval_ptr_ptr(op, Ts, type);
}
static inline zval *get_obj_zval_ptr(znode *op, temp_variable *Ts, zval **freeop, int type TSRMLS_DC)
{
if (op->op_type == IS_UNUSED) {
if (EG(This)) {
return EG(This);
} else {
zend_error(E_ERROR, "Using $this when not in object context");
}
}
return get_zval_ptr(op, Ts, freeop, type);
}
static inline void zend_assign_to_object(znode *result, znode *op1, znode *op2, znode *value_op, temp_variable *Ts TSRMLS_DC)
{
zval **object_ptr = get_obj_zval_ptr_ptr(op1, Ts, BP_VAR_W TSRMLS_CC);
zval *object;
zval *property = get_zval_ptr(op2, Ts, &EG(free_op2), BP_VAR_R);
zval *free_value;
zval *value = get_zval_ptr(value_op, Ts, &free_value, BP_VAR_R);
zval tmp;
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) {
zend_error(E_WARNING, "Attempt to assign property of non-object");
FREE_OP(Ts, op2, EG(free_op2));
*retval = EG(uninitialized_zval_ptr);
SELECTIVE_PZVAL_LOCK(*retval, result);
PZVAL_UNLOCK(value);
return;
}
/* here we are sure we are dealing with an object */
switch (op2->op_type) {
case IS_CONST:
/* already a constant string */
break;
case IS_VAR:
tmp = *property;
zval_copy_ctor(&tmp);
convert_to_string(&tmp);
property = &tmp;
break;
case IS_TMP_VAR:
convert_to_string(property);
break;
}
if (EG(implicit_clone)) {
SEPARATE_ZVAL_IF_NOT_REF(object_ptr);
object = *object_ptr;
}
/* here property is a string */
Z_OBJ_HT_P(object)->write_property(object, property, value TSRMLS_CC);
if (property == &tmp) {
zval_dtor(property);
}
FREE_OP(Ts, op2, EG(free_op2));
if (result) {
T(result->u.var).var.ptr = value;
T(result->u.var).var.ptr_ptr = NULL; /* see if we can nuke this */
SELECTIVE_PZVAL_LOCK(value, result);
}
}
static inline void zend_assign_to_object_op(znode *result, znode *op1, znode *op2, znode *value_op, temp_variable *Ts, int (*binary_op)(zval *result, zval *op1, zval *op2 TSRMLS_DC) TSRMLS_DC)
{
zval **object_ptr = get_obj_zval_ptr_ptr(op1, Ts, BP_VAR_W TSRMLS_CC);
zval *object;
zval *property = get_zval_ptr(op2, Ts, &EG(free_op2), BP_VAR_R);
zval *free_value;
zval *value = get_zval_ptr(value_op, Ts, &free_value, BP_VAR_R);
zval tmp;
zval **retval = &T(result->u.var).var.ptr;
int have_get_ptr = 0;
T(result->u.var).var.ptr_ptr = NULL;
make_real_object(object_ptr TSRMLS_CC);
object = *object_ptr;
if (object->type != IS_OBJECT) {
zend_error(E_WARNING, "Attempt to assign property of non-object");
FREE_OP(Ts, op2, EG(free_op2));
*retval = EG(uninitialized_zval_ptr);
SELECTIVE_PZVAL_LOCK(*retval, result);
return;
}
/* here we are sure we are dealing with an object */
switch (op2->op_type) {
case IS_CONST:
/* already a constant string */
break;
case IS_VAR:
tmp = *property;
zval_copy_ctor(&tmp);
convert_to_string(&tmp);
property = &tmp;
break;
case IS_TMP_VAR:
convert_to_string(property);
break;
}
/* here property is a string */
if (Z_OBJ_HT_P(object)->get_property_zval_ptr) {
zval **zptr = Z_OBJ_HT_P(object)->get_property_zval_ptr(object, property TSRMLS_CC);
if (zptr != NULL) { /* NULL means no success in getting PTR */
SEPARATE_ZVAL_IF_NOT_REF(zptr);
have_get_ptr = 1;
binary_op(*zptr, *zptr, value TSRMLS_CC);
*retval = *zptr;
SELECTIVE_PZVAL_LOCK(*retval, result);
}
}
if (!have_get_ptr) {
zval *z = Z_OBJ_HT_P(object)->read_property(object, property, BP_VAR_RW TSRMLS_CC);
SEPARATE_ZVAL_IF_NOT_REF(&z);
binary_op(z, z, value TSRMLS_CC);
Z_OBJ_HT_P(object)->write_property(object, property, z TSRMLS_CC);
*retval = z;
SELECTIVE_PZVAL_LOCK(*retval, result);
if (z->refcount <= 1) {
zval_dtor(z);
}
}
if (property == &tmp) {
zval_dtor(property);
}
FREE_OP(Ts, op2, EG(free_op2));
}
static inline void zend_assign_to_variable(znode *result, znode *op1, znode *op2, zval *value, int type, temp_variable *Ts TSRMLS_DC)
{
zval **variable_ptr_ptr = get_zval_ptr_ptr(op1, Ts, BP_VAR_W);
zval *variable_ptr;
if (!variable_ptr_ptr) {
switch (T(op1->u.var).EA.type) {
case IS_STRING_OFFSET: {
temp_variable *T = &T(op1->u.var);
if (T->EA.data.str_offset.str->type == IS_STRING) do {
zval tmp;
zval *final_value = value;
if ((T->EA.data.str_offset.offset < 0)) {
zend_error(E_WARNING, "Illegal string offset: %d", T->EA.data.str_offset.offset);
break;
}
if (T->EA.data.str_offset.offset >= T->EA.data.str_offset.str->value.str.len) {
zend_uint i;
if (T->EA.data.str_offset.str->value.str.len==0) {
STR_FREE(T->EA.data.str_offset.str->value.str.val);
T->EA.data.str_offset.str->value.str.val = (char *) emalloc(T->EA.data.str_offset.offset+1+1);
} else {
T->EA.data.str_offset.str->value.str.val = (char *) erealloc(T->EA.data.str_offset.str->value.str.val, T->EA.data.str_offset.offset+1+1);
}
for (i=T->EA.data.str_offset.str->value.str.len; i<T->EA.data.str_offset.offset; i++) {
T->EA.data.str_offset.str->value.str.val[i] = ' ';
}
T->EA.data.str_offset.str->value.str.val[T->EA.data.str_offset.offset+1] = 0;
T->EA.data.str_offset.str->value.str.len = T->EA.data.str_offset.offset+1;
}
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.data.str_offset.str->value.str.val[T->EA.data.str_offset.offset] = final_value->value.str.val[0];
if (op2
&& op2->op_type == IS_VAR
&& value==&T(op2->u.var).tmp_var) {
STR_FREE(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->EA.data.str_offset.str;
*/
} while (0);
/* zval_ptr_dtor(&T->EA.data.str_offset.str); Nuke this line if it doesn't cause a leak */
T->tmp_var.type = IS_STRING;
}
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
T(result->u.var).var.ptr_ptr = &EG(uninitialized_zval_ptr);
SELECTIVE_PZVAL_LOCK(*T(result->u.var).var.ptr_ptr, result);
AI_USE_PTR(T(result->u.var).var);
return;
}
variable_ptr = *variable_ptr_ptr;
if (variable_ptr == EG(error_zval_ptr)) {
if (result) {
T(result->u.var).var.ptr_ptr = &EG(uninitialized_zval_ptr);
SELECTIVE_PZVAL_LOCK(*T(result->u.var).var.ptr_ptr, result);
AI_USE_PTR(T(result->u.var).var);
}
if (type==IS_TMP_VAR) {
zval_dtor(value);
}
return;
}
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_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_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;
}
if (result) {
T(result->u.var).var.ptr_ptr = variable_ptr_ptr;
SELECTIVE_PZVAL_LOCK(*variable_ptr_ptr, result);
AI_USE_PTR(T(result->u.var).var);
}
}
/* 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 void print_refcount(zval *p, char *str)
{
print_refcount(NULL, NULL);
}
static inline HashTable *zend_find_inherited_static(zend_class_entry *ce, zval *variable)
{
zend_class_entry *orig_ce = ce;
while (ce) {
if (zend_hash_exists(ce->static_members, Z_STRVAL_P(variable), Z_STRLEN_P(variable)+1)) {
return ce->static_members;
}
ce = ce->parent;
}
return orig_ce->static_members;
}
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:
/* Don't think this is actually needed.
if (opline->op1.op_type == IS_VAR) {
PZVAL_LOCK(varname);
}
+ */
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;
case ZEND_FETCH_STATIC_MEMBER:
if (T(opline->op2.u.var).EA.class_entry->parent) {
/* if inherited, try to look up */
return zend_find_inherited_static(T(opline->op2.u.var).EA.class_entry, variable);
} else {
/* if class is not inherited, no point in checking */
return T(opline->op2.u.var).EA.class_entry->static_members;
}
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
return NULL;
}
static void zend_fetch_var_address(zend_op *opline, temp_variable *Ts, int type TSRMLS_DC)
{
zval *free_op1;
zval *varname = get_zval_ptr(&opline->op1, Ts, &free_op1, BP_VAR_R);
zval **retval;
zval tmp_varname;
HashTable *target_symbol_table;
if (varname->type != IS_STRING) {
tmp_varname = *varname;
zval_copy_ctor(&tmp_varname);
convert_to_string(&tmp_varname);
varname = &tmp_varname;
}
target_symbol_table = zend_get_target_symbol_table(opline, Ts, type, varname TSRMLS_CC);
if (!target_symbol_table) {
return;
}
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(target_symbol_table, varname->value.str.val, varname->value.str.len+1, &new_zval, sizeof(zval *), (void **) &retval);
}
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
}
if (opline->op2.u.EA.type == ZEND_FETCH_LOCAL) {
FREE_OP(Ts, &opline->op1, free_op1);
} else if (opline->op2.u.EA.type == ZEND_FETCH_STATIC || opline->op2.u.EA.type == ZEND_FETCH_STATIC_MEMBER) {
zval_update_constant(retval, (void *) 1 TSRMLS_CC);
}
if (varname == &tmp_varname) {
zval_dtor(varname);
}
T(opline->result.u.var).var.ptr_ptr = retval;
SELECTIVE_PZVAL_LOCK(*retval, &opline->result);
}
static inline zval **zend_fetch_dimension_address_inner(HashTable *ht, znode *op2, temp_variable *Ts, int type TSRMLS_DC)
{
zval *dim = get_zval_ptr(op2, Ts, &EG(free_op2), BP_VAR_R);
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_hash_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_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_hash_update(ht, offset_key, offset_key_length+1, &new_zval, sizeof(zval *), (void **) &retval);
}
break;
}
}
break;
case IS_DOUBLE:
case IS_RESOURCE:
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: %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(Ts, op2, EG(free_op2));
return retval;
}
static void zend_fetch_dimension_address(znode *result, znode *op1, znode *op2, temp_variable *Ts, int type TSRMLS_DC)
{
zval **container_ptr = get_zval_ptr_ptr(op1, Ts, type);
zval *container;
zval ***retval = &T(result->u.var).var.ptr_ptr;
if (!container_ptr) {
if (T(op1->u.var).EA.type == IS_STRING_OFFSET) {
zval *offset;
zend_error(E_WARNING, "Cannot use string offset as an array");
offset = get_zval_ptr(op2, Ts, &EG(free_op2), BP_VAR_R);
FREE_OP(Ts, op2, EG(free_op2));
}
*retval = &EG(error_zval_ptr);
SELECTIVE_PZVAL_LOCK(**retval, result);
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_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) {
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 (op2->op_type == IS_UNUSED) {
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(uninitialized_zval_ptr);
new_zval->refcount--;
}
} else {
*retval = zend_fetch_dimension_address_inner(container->value.ht, op2, Ts, type TSRMLS_CC);
}
SELECTIVE_PZVAL_LOCK(**retval, result);
break;
case IS_NULL:
/* for read-mode only */
get_zval_ptr(op2, Ts, &EG(free_op2), BP_VAR_R);
*retval = &EG(uninitialized_zval_ptr);
SELECTIVE_PZVAL_LOCK(**retval, result);
FREE_OP(Ts, op2, EG(free_op2));
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 *offset;
zval tmp;
if (op2->op_type==IS_UNUSED) {
zend_error(E_ERROR, "[] operator not supported for strings");
}
offset = get_zval_ptr(op2, Ts, &EG(free_op2), BP_VAR_R);
if (offset->type != IS_LONG) {
tmp = *offset;
zval_copy_ctor(&tmp);
convert_to_long(&tmp);
offset = &tmp;
}
if (type!=BP_VAR_R && type!=BP_VAR_IS) {
SEPARATE_ZVAL_IF_NOT_REF(container_ptr);
}
container = *container_ptr;
T(result->u.var).EA.data.str_offset.str = container;
PZVAL_LOCK(container);
T(result->u.var).EA.data.str_offset.offset = offset->value.lval;
T(result->u.var).EA.type = IS_STRING_OFFSET;
FREE_OP(Ts, op2, EG(free_op2));
*retval = NULL;
return;
}
break;
default: {
zval *offset;
offset = get_zval_ptr(op2, Ts, &EG(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(Ts, op2, EG(free_op2));
SELECTIVE_PZVAL_LOCK(**retval, result);
if (type==BP_VAR_W || type==BP_VAR_RW) {
zend_error(E_WARNING, "Cannot use a scalar value as an array");
}
}
break;
}
}
static void zend_fetch_dimension_address_from_tmp_var(znode *result, znode *op1, znode *op2, temp_variable *Ts TSRMLS_DC)
{
zval *free_op1;
zval *container = get_zval_ptr(op1, Ts, &free_op1, BP_VAR_R);
if (container->type != IS_ARRAY) {
T(result->u.var).var.ptr_ptr = &EG(uninitialized_zval_ptr);
SELECTIVE_PZVAL_LOCK(*T(result->u.var).var.ptr_ptr, result);
return;
}
T(result->u.var).var.ptr_ptr = zend_fetch_dimension_address_inner(container->value.ht, op2, Ts, BP_VAR_R TSRMLS_CC);
SELECTIVE_PZVAL_LOCK(*T(result->u.var).var.ptr_ptr, result);
}
static void zend_fetch_property_address(znode *result, znode *op1, znode *op2, temp_variable *Ts, int type TSRMLS_DC)
{
zval **container_ptr = get_obj_zval_ptr_ptr(op1, Ts, type TSRMLS_CC);
zval *container;
zval ***retval = &T(result->u.var).var.ptr_ptr;
container = *container_ptr;
if (container == EG(error_zval_ptr)) {
*retval = &EG(error_zval_ptr);
SELECTIVE_PZVAL_LOCK(**retval, result);
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) {
zval *offset;
offset = get_zval_ptr(op2, Ts, &EG(free_op2), BP_VAR_R);
FREE_OP(Ts, op2, EG(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)) {
SEPARATE_ZVAL(container_ptr);
container = *container_ptr;
}
*retval = zend_fetch_property_address_inner(container, op2, Ts, type TSRMLS_CC);
SELECTIVE_PZVAL_LOCK(**retval, result);
}
static void zend_fetch_property_address_read(znode *result, znode *op1, znode *op2, temp_variable *Ts, int type TSRMLS_DC)
{
zval *container;
zval **retval;
retval = &T(result->u.var).var.ptr;
T(result->u.var).var.ptr_ptr = retval;
container = get_obj_zval_ptr(op1, Ts, &EG(free_op1), type TSRMLS_CC);
if (container == EG(error_zval_ptr)) {
*retval = EG(error_zval_ptr);
SELECTIVE_PZVAL_LOCK(*retval, result);
return;
}
if (container->type != IS_OBJECT) {
zend_error(E_NOTICE, "Trying to get property of non-object");
if (type==BP_VAR_R || type==BP_VAR_IS) {
*retval = EG(uninitialized_zval_ptr);
} else {
*retval = EG(error_zval_ptr);
}
} else {
zval *offset;
zval tmp;
offset = get_zval_ptr(op2, Ts, &EG(free_op2), BP_VAR_R);