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c1965f58d4
php-src/Zend/zend_execute.c
Dmitry Stogov c1965f58d4 Use reference counting instead of zval duplication
2014-06-05 16:04:11 +04:00

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2014 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_ini.h"
#include "zend_exceptions.h"
#include "zend_interfaces.h"
#include "zend_closures.h"
#include "zend_generators.h"
#include "zend_vm.h"
#include "zend_dtrace.h"
/* Virtual current working directory support */
#include "zend_virtual_cwd.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(op_type, node, ex, should_free, type) _get_zval_ptr(op_type, node, ex, should_free, type TSRMLS_CC)
#define get_zval_ptr_deref(op_type, node, ex, should_free, type) _get_zval_ptr_deref(op_type, node, ex, should_free, type TSRMLS_CC)
#define get_zval_ptr_ptr(op_type, node, ex, should_free, type) _get_zval_ptr_ptr(op_type, node, ex, should_free, type TSRMLS_CC)
#define get_zval_ptr_ptr_undef(op_type, node, ex, should_free, type) _get_zval_ptr_ptr(op_type, node, ex, should_free, type TSRMLS_CC)
#define get_obj_zval_ptr(op_type, node, ex, should_free, type) _get_obj_zval_ptr(op_type, node, ex, should_free, type TSRMLS_CC)
#define get_obj_zval_ptr_ptr(op_type, node, ex, should_free, type) _get_obj_zval_ptr_ptr(op_type, node, ex, should_free, type TSRMLS_CC)
/* Prototypes */
static void zend_extension_statement_handler(const zend_extension *extension, zend_op_array *op_array TSRMLS_DC);
static void zend_extension_fcall_begin_handler(const zend_extension *extension, zend_op_array *op_array TSRMLS_DC);
static void zend_extension_fcall_end_handler(const zend_extension *extension, zend_op_array *op_array TSRMLS_DC);
#define RETURN_VALUE_USED(opline) (!((opline)->result_type & EXT_TYPE_UNUSED))
#define TEMP_VAR_STACK_LIMIT 2000
static zend_always_inline void zend_pzval_unlock_func(zval *z, zend_free_op *should_free)
{
should_free->var = NULL;
if (Z_REFCOUNTED_P(z) && !Z_DELREF_P(z)) {
Z_SET_REFCOUNT_P(z, 1);
should_free->var = z;
/* should_free->is_var = 1; */
}
}
#undef zval_ptr_dtor
#define zval_ptr_dtor(zv) i_zval_ptr_dtor(zv ZEND_FILE_LINE_CC TSRMLS_CC)
#define zval_ptr_dtor_nogc(zv) i_zval_ptr_dtor_nogc(zv ZEND_FILE_LINE_CC TSRMLS_CC)
#define PZVAL_UNLOCK(z, f) zend_pzval_unlock_func(z, f)
#define PZVAL_LOCK(z) if (Z_REFCOUNTED_P(z)) Z_ADDREF_P((z))
#define SELECTIVE_PZVAL_LOCK(pzv, opline) if (RETURN_VALUE_USED(opline)) { PZVAL_LOCK(pzv); }
#define EXTRACT_ZVAL_PTR(zv) do { \
zval *__zv = (zv); \
if (Z_TYPE_P(__zv) == IS_INDIRECT) { \
ZVAL_COPY(__zv, Z_INDIRECT_P(__zv)); \
} \
} while (0)
#define FREE_OP(should_free) \
if (should_free.var) { \
if ((zend_uintptr_t)should_free.var & 1L) { \
zval_dtor((zval*)((zend_uintptr_t)should_free.var & ~1L)); \
} else { \
zval_ptr_dtor_nogc(should_free.var); \
} \
}
#define FREE_OP_IF_VAR(should_free) \
if (should_free.var != NULL && (((zend_uintptr_t)should_free.var & 1L) == 0)) { \
zval_ptr_dtor_nogc(should_free.var); \
}
#define FREE_OP_VAR_PTR(should_free) \
if (should_free.var) { \
zval_ptr_dtor_nogc(should_free.var); \
}
#define TMP_FREE(z) (zval*)(((zend_uintptr_t)(z)) | 1L)
#define IS_TMP_FREE(should_free) ((zend_uintptr_t)should_free.var & 1L)
/* End of zend_execute_locks.h */
#define CV_DEF_OF(i) (EG(active_op_array)->vars[i])
#define CTOR_CALL_BIT 0x1
#define CTOR_USED_BIT 0x2
#define IS_CTOR_CALL(ce) (((zend_uintptr_t)(ce)) & CTOR_CALL_BIT)
#define IS_CTOR_USED(ce) (((zend_uintptr_t)(ce)) & CTOR_USED_BIT)
#define ENCODE_CTOR(ce, used) \
((zend_class_entry*)(((zend_uintptr_t)(ce)) | CTOR_CALL_BIT | ((used) ? CTOR_USED_BIT : 0)))
#define DECODE_CTOR(ce) \
((zend_class_entry*)(((zend_uintptr_t)(ce)) & ~(CTOR_CALL_BIT|CTOR_USED_BIT)))
#undef EX
#define EX(element) execute_data->element
ZEND_API zval* zend_get_compiled_variable_value(const zend_execute_data *execute_data, zend_uint var)
{
return EX_VAR(var);
}
static zend_always_inline zval *_get_zval_ptr_tmp(zend_uint var, const zend_execute_data *execute_data, zend_free_op *should_free TSRMLS_DC)
{
zval *ret = EX_VAR(var);
should_free->var = ret;
ZEND_ASSERT(Z_TYPE_P(ret) != IS_REFERENCE);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_var(zend_uint var, const zend_execute_data *execute_data, zend_free_op *should_free TSRMLS_DC)
{
zval *ret = EX_VAR(var);
should_free->var = ret;
return ret;
}
static zend_always_inline zval *_get_zval_ptr_var_deref(zend_uint var, const zend_execute_data *execute_data, zend_free_op *should_free TSRMLS_DC)
{
zval *ret = EX_VAR(var);
should_free->var = ret;
ZVAL_DEREF(ret);
return ret;
}
static zend_never_inline zval *_get_zval_cv_lookup(zval *ptr, zend_uint var, int type TSRMLS_DC)
{
zend_string *cv;
switch (type) {
case BP_VAR_R:
case BP_VAR_UNSET:
cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
zend_error(E_NOTICE, "Undefined variable: %s", cv->val);
/* break missing intentionally */
case BP_VAR_IS:
ptr = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
zend_error(E_NOTICE, "Undefined variable: %s", cv->val);
/* break missing intentionally */
case BP_VAR_W:
ZVAL_NULL(ptr);
break;
}
return ptr;
}
static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_R(zval *ptr, zend_uint var TSRMLS_DC)
{
zend_string *cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
zend_error(E_NOTICE, "Undefined variable: %s", cv->val);
return &EG(uninitialized_zval);
}
static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_UNSET(zval *ptr, zend_uint var TSRMLS_DC)
{
zend_string *cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
zend_error(E_NOTICE, "Undefined variable: %s", cv->val);
return &EG(uninitialized_zval);
}
static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_IS(zval *ptr, zend_uint var TSRMLS_DC)
{
return &EG(uninitialized_zval);
}
static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_RW(zval *ptr, zend_uint var TSRMLS_DC)
{
zend_string *cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
ZVAL_NULL(ptr);
zend_error(E_NOTICE, "Undefined variable: %s", cv->val);
return ptr;
}
static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_W(zval *ptr, zend_uint var TSRMLS_DC)
{
ZVAL_NULL(ptr);
return ptr;
}
static zend_always_inline zval *_get_zval_ptr_cv(const zend_execute_data *execute_data, zend_uint var, int type TSRMLS_DC)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup(ret, var, type TSRMLS_CC);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref(const zend_execute_data *execute_data, zend_uint var, int type TSRMLS_DC)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup(ret, var, type TSRMLS_CC);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_R(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_R(ret, var TSRMLS_CC);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_R(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_R(ret, var TSRMLS_CC);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_UNSET(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_UNSET(ret, var TSRMLS_CC);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_UNSET(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_UNSET(ret, var TSRMLS_CC);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_IS(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval *ret = EX_VAR(var);
if (Z_TYPE_P(ret) == IS_UNDEF) {
return _get_zval_cv_lookup_BP_VAR_IS(ret, var TSRMLS_CC);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_IS(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval *ret = EX_VAR(var);
if (Z_TYPE_P(ret) == IS_UNDEF) {
return _get_zval_cv_lookup_BP_VAR_IS(ret, var TSRMLS_CC);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_RW(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_RW(ret, var TSRMLS_CC);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_RW(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_RW(ret, var TSRMLS_CC);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_W(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval *ret = EX_VAR(var);
if (Z_TYPE_P(ret) == IS_UNDEF) {
return _get_zval_cv_lookup_BP_VAR_W(ret, var TSRMLS_CC);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_undef_BP_VAR_W(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
return EX_VAR(var);
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_W(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval *ret = EX_VAR(var);
if (Z_TYPE_P(ret) == IS_UNDEF) {
return _get_zval_cv_lookup_BP_VAR_W(ret, var TSRMLS_CC);
}
ZVAL_DEREF(ret);
return ret;
}
static inline zval *_get_zval_ptr(int op_type, const znode_op *node, const zend_execute_data *execute_data, zend_free_op *should_free, int type TSRMLS_DC)
{
zval *ret;
switch (op_type) {
case IS_CONST:
should_free->var = NULL;
return node->zv;
break;
case IS_TMP_VAR:
ret = EX_VAR(node->var);
should_free->var = TMP_FREE(ret);
return ret;
break;
case IS_VAR:
return _get_zval_ptr_var(node->var, execute_data, should_free TSRMLS_CC);
break;
case IS_UNUSED:
should_free->var = NULL;
return NULL;
break;
case IS_CV:
default:
should_free->var = NULL;
return _get_zval_ptr_cv(execute_data, node->var, type TSRMLS_CC);
break;
}
return NULL;
}
static inline zval *_get_zval_ptr_deref(int op_type, const znode_op *node, const zend_execute_data *execute_data, zend_free_op *should_free, int type TSRMLS_DC)
{
zval *ret;
switch (op_type) {
case IS_CONST:
should_free->var = NULL;
return node->zv;
break;
case IS_TMP_VAR:
ret = EX_VAR(node->var);
should_free->var = TMP_FREE(ret);
return ret;
break;
case IS_VAR:
return _get_zval_ptr_var_deref(node->var, execute_data, should_free TSRMLS_CC);
break;
case IS_UNUSED:
should_free->var = NULL;
return NULL;
break;
case IS_CV:
default:
should_free->var = NULL;
return _get_zval_ptr_cv_deref(execute_data, node->var, type TSRMLS_CC);
break;
}
return NULL;
}
static zend_always_inline zval *_get_zval_ptr_ptr_var(zend_uint var, const zend_execute_data *execute_data, zend_free_op *should_free TSRMLS_DC)
{
zval *ret = EX_VAR(var);
if (EXPECTED(Z_TYPE_P(ret) == IS_INDIRECT)) {
should_free->var = NULL;
return Z_INDIRECT_P(ret);
} else if (!Z_REFCOUNTED_P(ret)) {
should_free->var = ret; //???
return ret;
} else {
PZVAL_UNLOCK(ret, should_free);
return ret;
}
}
static inline zval *_get_zval_ptr_ptr(int op_type, const znode_op *node, const zend_execute_data *execute_data, zend_free_op *should_free, int type TSRMLS_DC)
{
if (op_type == IS_CV) {
should_free->var = NULL;
return _get_zval_ptr_cv(execute_data, node->var, type TSRMLS_CC);
} else /* if (op_type == IS_VAR) */ {
ZEND_ASSERT(op_type == IS_VAR);
return _get_zval_ptr_ptr_var(node->var, execute_data, should_free TSRMLS_CC);
}
}
static zend_always_inline zval *_get_obj_zval_ptr_unused(TSRMLS_D)
{
if (EXPECTED(Z_OBJ(EG(This)) != NULL)) {
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(int op_type, znode_op *op, const zend_execute_data *execute_data, zend_free_op *should_free, int type TSRMLS_DC)
{
if (op_type == IS_UNUSED) {
if (EXPECTED(Z_OBJ(EG(This)) != NULL)) {
should_free->var = NULL;
return &EG(This);
} else {
zend_error_noreturn(E_ERROR, "Using $this when not in object context");
}
}
return get_zval_ptr(op_type, op, execute_data, should_free, type);
}
static inline zval *_get_obj_zval_ptr_ptr(int op_type, const znode_op *node, const zend_execute_data *execute_data, zend_free_op *should_free, int type TSRMLS_DC)
{
if (op_type == IS_UNUSED) {
if (EXPECTED(Z_OBJ(EG(This)) != NULL)) {
should_free->var = NULL;
return &EG(This);
} else {
zend_error_noreturn(E_ERROR, "Using $this when not in object context");
}
}
return get_zval_ptr_ptr(op_type, node, execute_data, should_free, type);
}
static inline void zend_assign_to_variable_reference(zval *variable_ptr, zval *value_ptr TSRMLS_DC)
{
if (EXPECTED(variable_ptr != value_ptr)) {
ZVAL_MAKE_REF(value_ptr);
Z_ADDREF_P(value_ptr);
zval_ptr_dtor(variable_ptr);
ZVAL_REF(variable_ptr, Z_REF_P(value_ptr));
} else {
ZVAL_MAKE_REF(variable_ptr);
}
}
/* this should modify object only if it's empty */
static inline zval* make_real_object(zval *object_ptr TSRMLS_DC)
{
zval *object = object_ptr;
ZVAL_DEREF(object);
if (UNEXPECTED(Z_TYPE_P(object) != IS_OBJECT)) {
if (Z_TYPE_P(object) == IS_NULL
|| Z_TYPE_P(object) == IS_FALSE
|| (Z_TYPE_P(object) == IS_STRING && Z_STRLEN_P(object) == 0)) {
zval_ptr_dtor_nogc(object);
object_init(object);
zend_error(E_WARNING, "Creating default object from empty value");
}
}
return object;
}
ZEND_API char * zend_verify_arg_class_kind(const zend_arg_info *cur_arg_info, ulong fetch_type, char **class_name, zend_class_entry **pce TSRMLS_DC)
{
zend_string *key;
ALLOCA_FLAG(use_heap);
STR_ALLOCA_INIT(key, cur_arg_info->class_name, cur_arg_info->class_name_len, use_heap);
*pce = zend_fetch_class(key, (fetch_type | ZEND_FETCH_CLASS_AUTO | ZEND_FETCH_CLASS_NO_AUTOLOAD) TSRMLS_CC);
STR_ALLOCA_FREE(key, use_heap);
*class_name = (*pce) ? (*pce)->name->val : (char*)cur_arg_info->class_name;
if (*pce && (*pce)->ce_flags & ZEND_ACC_INTERFACE) {
return "implement interface ";
} else {
return "be an instance of ";
}
}
ZEND_API void zend_verify_arg_error(int error_type, const zend_function *zf, zend_uint arg_num, const char *need_msg, const char *need_kind, const char *given_msg, const char *given_kind TSRMLS_DC)
{
zend_execute_data *ptr = EG(current_execute_data)->prev_execute_data;
const char *fname = zf->common.function_name->val;
const char *fsep;
const char *fclass;
if (zf->common.scope) {
fsep = "::";
fclass = zf->common.scope->name->val;
} else {
fsep = "";
fclass = "";
}
if (ptr && ptr->op_array) {
zend_error(error_type, "Argument %d passed to %s%s%s() must %s%s, %s%s given, called in %s on line %d and defined", arg_num, fclass, fsep, fname, need_msg, need_kind, given_msg, given_kind, ptr->op_array->filename->val, ptr->opline->lineno);
} else {
zend_error(error_type, "Argument %d passed to %s%s%s() must %s%s, %s%s given", arg_num, fclass, fsep, fname, need_msg, need_kind, given_msg, given_kind);
}
}
static void zend_verify_arg_type(zend_function *zf, zend_uint arg_num, zval *arg, ulong fetch_type TSRMLS_DC)
{
zend_arg_info *cur_arg_info;
char *need_msg;
zend_class_entry *ce;
if (UNEXPECTED(!zf->common.arg_info)) {
return;
}
if (EXPECTED(arg_num <= zf->common.num_args)) {
cur_arg_info = &zf->common.arg_info[arg_num-1];
} else if (zf->common.fn_flags & ZEND_ACC_VARIADIC) {
cur_arg_info = &zf->common.arg_info[zf->common.num_args-1];
} else {
return;
}
if (cur_arg_info->class_name) {
char *class_name;
ZVAL_DEREF(arg);
if (Z_TYPE_P(arg) == IS_OBJECT) {
need_msg = zend_verify_arg_class_kind(cur_arg_info, fetch_type, &class_name, &ce TSRMLS_CC);
if (!ce || !instanceof_function(Z_OBJCE_P(arg), ce TSRMLS_CC)) {
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, need_msg, class_name, "instance of ", Z_OBJCE_P(arg)->name->val TSRMLS_CC);
}
} else if (Z_TYPE_P(arg) != IS_NULL || !cur_arg_info->allow_null) {
need_msg = zend_verify_arg_class_kind(cur_arg_info, fetch_type, &class_name, &ce TSRMLS_CC);
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, need_msg, class_name, zend_zval_type_name(arg), "" TSRMLS_CC);
}
} else if (cur_arg_info->type_hint) {
switch(cur_arg_info->type_hint) {
case IS_ARRAY:
ZVAL_DEREF(arg);
if (Z_TYPE_P(arg) != IS_ARRAY && (Z_TYPE_P(arg) != IS_NULL || !cur_arg_info->allow_null)) {
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be of the type array", "", zend_zval_type_name(arg), "" TSRMLS_CC);
}
break;
case IS_CALLABLE:
if (!zend_is_callable(arg, IS_CALLABLE_CHECK_SILENT, NULL TSRMLS_CC) && (Z_TYPE_P(arg) != IS_NULL || !cur_arg_info->allow_null)) {
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be callable", "", zend_zval_type_name(arg), "" TSRMLS_CC);
}
break;
default:
zend_error(E_ERROR, "Unknown typehint");
}
}
}
static inline int zend_verify_missing_arg_type(zend_function *zf, zend_uint arg_num, ulong fetch_type TSRMLS_DC)
{
zend_arg_info *cur_arg_info;
char *need_msg;
zend_class_entry *ce;
if (UNEXPECTED(!zf->common.arg_info)) {
return 1;
}
if (EXPECTED(arg_num <= zf->common.num_args)) {
cur_arg_info = &zf->common.arg_info[arg_num-1];
} else if (zf->common.fn_flags & ZEND_ACC_VARIADIC) {
cur_arg_info = &zf->common.arg_info[zf->common.num_args-1];
} else {
return 1;
}
if (cur_arg_info->class_name) {
char *class_name;
need_msg = zend_verify_arg_class_kind(cur_arg_info, fetch_type, &class_name, &ce TSRMLS_CC);
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, need_msg, class_name, "none", "" TSRMLS_CC);
} else if (cur_arg_info->type_hint) {
switch(cur_arg_info->type_hint) {
case IS_ARRAY:
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be of the type array", "", "none", "" TSRMLS_CC);
break;
case IS_CALLABLE:
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be callable", "", "none", "" TSRMLS_CC);
break;
default:
zend_error(E_ERROR, "Unknown typehint");
}
}
return 0;
}
static void zend_verify_missing_arg(zend_execute_data *execute_data, zend_uint arg_num TSRMLS_DC)
{
if (EXPECTED(!(EX(op_array)->fn_flags & ZEND_ACC_HAS_TYPE_HINTS)) ||
zend_verify_missing_arg_type((zend_function *) EX(op_array), arg_num, EX(opline)->extended_value TSRMLS_CC)) {
const char *class_name = EX(op_array)->scope ? EX(op_array)->scope->name->val : "";
const char *space = EX(op_array)->scope ? "::" : "";
const char *func_name = EX(op_array)->function_name ? EX(op_array)->function_name->val : "main";
zend_execute_data *ptr = EX(prev_execute_data);
if(ptr && ptr->op_array) {
zend_error(E_WARNING, "Missing argument %u for %s%s%s(), called in %s on line %d and defined", arg_num, class_name, space, func_name, ptr->op_array->filename->val, ptr->opline->lineno);
} else {
zend_error(E_WARNING, "Missing argument %u for %s%s%s()", arg_num, class_name, space, func_name);
}
}
}
static inline void zend_assign_to_object(zval *retval, zval *object_ptr, zval *property_name, int value_type, znode_op *value_op, const zend_execute_data *execute_data, int opcode, zend_uint cache_slot TSRMLS_DC)
{
zend_free_op free_value;
zval *value = get_zval_ptr(value_type, value_op, execute_data, &free_value, BP_VAR_R);
zval tmp;
zval *object = object_ptr;
ZVAL_DEREF(object);
if (Z_TYPE_P(object) != IS_OBJECT) {
if (object == &EG(error_zval)) {
if (retval) {
ZVAL_NULL(retval);
}
FREE_OP(free_value);
return;
}
if (Z_TYPE_P(object) == IS_NULL ||
Z_TYPE_P(object) == IS_FALSE ||
(Z_TYPE_P(object) == IS_STRING && Z_STRLEN_P(object) == 0)) {
//??? The following block may handle only non-interned empty string,
//??? but it doesn't work anyway
//??? see: Zend/tests/bug54265.phpt
#if 0
if (Z_REFCOUNTED_P(object)) {
if (!Z_ISREF_P(object_ptr)) {
SEPARATE_ZVAL(object);
}
Z_ADDREF_P(object);
zend_error(E_WARNING, "Creating default object from empty value");
if (Z_REFCOUNT_P(object) == 1) {
/* object was removed by error handler, nothing to assign to */
zval_ptr_dtor(object);
if (retval) {
ZVAL_NULL(retval);
}
FREE_OP(free_value);
return;
}
Z_DELREF_P(object);
} else {
zend_error(E_WARNING, "Creating default object from empty value");
}
#else
zend_error(E_WARNING, "Creating default object from empty value");
#endif
zval_dtor(object);
object_init(object);
} else {
zend_error(E_WARNING, "Attempt to assign property of non-object");
if (retval) {
ZVAL_NULL(retval);
}
FREE_OP(free_value);
return;
}
}
/* separate our value if necessary */
if (value_type == IS_TMP_VAR) {
ZVAL_COPY_VALUE(&tmp, value);
value = &tmp;
} else if (value_type == IS_CONST) {
if (UNEXPECTED(Z_OPT_COPYABLE_P(value))) {
ZVAL_COPY_VALUE(&tmp, value);
zval_copy_ctor_func(&tmp);
value = &tmp;
}
} else if (Z_REFCOUNTED_P(value)) {
Z_ADDREF_P(value);
}
if (opcode == ZEND_ASSIGN_OBJ) {
if (!Z_OBJ_HT_P(object)->write_property) {
zend_error(E_WARNING, "Attempt to assign property of non-object");
if (retval) {
ZVAL_NULL(retval);
}
if (value_type == IS_CONST) {
zval_ptr_dtor(value);
}
FREE_OP(free_value);
return;
}
Z_OBJ_HT_P(object)->write_property(object, property_name, value, cache_slot 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");
}
Z_OBJ_HT_P(object)->write_dimension(object, property_name, value TSRMLS_CC);
}
if (retval && !EG(exception)) {
ZVAL_COPY(retval, value);
}
zval_ptr_dtor(value);
FREE_OP_IF_VAR(free_value);
}
static void zend_assign_to_string_offset(zval *str_offset, zval *value, int value_type, zval *result TSRMLS_DC)
{
zval *str = Z_STR_OFFSET_STR_P(str_offset);
zend_uint offset = Z_STR_OFFSET_IDX_P(str_offset);
zend_string *old_str;
if ((int)offset < 0) {
zend_error(E_WARNING, "Illegal string offset: %d", offset);
STR_RELEASE(Z_STR_P(str));
if (result) {
ZVAL_NULL(result);
}
return;
}
old_str = Z_STR_P(str);
if (offset >= Z_STRLEN_P(str)) {
int old_len = Z_STRLEN_P(str);
Z_STR_P(str) = STR_REALLOC(Z_STR_P(str), offset + 1, 0);
Z_TYPE_INFO_P(str) = IS_STRING_EX;
memset(Z_STRVAL_P(str) + old_len, ' ', offset - old_len);
Z_STRVAL_P(str)[offset+1] = 0;
} else if (IS_INTERNED(Z_STR_P(str))) {
Z_STR_P(str) = STR_INIT(Z_STRVAL_P(str), Z_STRLEN_P(str), 0);
Z_TYPE_INFO_P(str) = IS_STRING_EX;
}
if (Z_TYPE_P(value) != IS_STRING) {
zend_string *tmp = zval_get_string(value);
Z_STRVAL_P(str)[offset] = tmp->val[0];
STR_RELEASE(tmp);
} else {
Z_STRVAL_P(str)[offset] = Z_STRVAL_P(value)[0];
if (value_type == IS_TMP_VAR) {
/* we can safely free final_value here
* because separation is done only
* in case value_type == IS_VAR */
zval_dtor(value);
}
}
/*
* the value of an assignment to a string offset is undefined
T(result->u.var).var = &T->str_offset.str;
*/
STR_RELEASE(old_str);
if (result) {
zend_uchar c = (zend_uchar)Z_STRVAL_P(str)[offset];
if (CG(one_char_string)[c]) {
ZVAL_INT_STR(result, CG(one_char_string)[c]);
} else {
ZVAL_NEW_STR(result, STR_INIT(Z_STRVAL_P(str) + offset, 1, 0));
}
}
}
static inline zval* zend_assign_tmp_to_variable(zval *variable_ptr, zval *value TSRMLS_DC)
{
ZVAL_DEREF(variable_ptr);
if (UNEXPECTED(Z_REFCOUNTED_P(variable_ptr))) {
zend_refcounted *garbage;
if (Z_TYPE_P(variable_ptr) == IS_OBJECT &&
UNEXPECTED(Z_OBJ_HANDLER_P(variable_ptr, set) != NULL)) {
Z_OBJ_HANDLER_P(variable_ptr, set)(variable_ptr, value TSRMLS_CC);
return variable_ptr;
}
garbage = Z_COUNTED_P(variable_ptr);
if (UNEXPECTED(GC_REFCOUNT(garbage) > 1)) {
/* we need to split */
GC_REFCOUNT(garbage)--;
/* optimized version of GC_ZVAL_CHECK_POSSIBLE_ROOT(variable_ptr) */
if ((Z_COLLECTABLE_P(variable_ptr)) &&
UNEXPECTED(!GC_INFO(garbage))) {
gc_possible_root(garbage TSRMLS_CC);
}
} else {
ZVAL_COPY_VALUE(variable_ptr, value);
_zval_dtor_func(garbage ZEND_FILE_LINE_CC);
return variable_ptr;
}
}
ZVAL_COPY_VALUE(variable_ptr, value);
return variable_ptr;
}
static inline zval* zend_assign_const_to_variable(zval *variable_ptr, zval *value TSRMLS_DC)
{
ZVAL_DEREF(variable_ptr);
if (UNEXPECTED(Z_REFCOUNTED_P(variable_ptr))) {
zend_refcounted *garbage;
if (Z_TYPE_P(variable_ptr) == IS_OBJECT &&
UNEXPECTED(Z_OBJ_HANDLER_P(variable_ptr, set) != NULL)) {
Z_OBJ_HANDLER_P(variable_ptr, set)(variable_ptr, value TSRMLS_CC);
return variable_ptr;
}
garbage = Z_COUNTED_P(variable_ptr);
if (UNEXPECTED(GC_REFCOUNT(garbage) > 1)) {
/* we need to split */
GC_REFCOUNT(garbage)--;
/* optimized version of GC_ZVAL_CHECK_POSSIBLE_ROOT(variable_ptr) */
if (Z_COLLECTABLE_P(variable_ptr) &&
UNEXPECTED(!GC_INFO(garbage))) {
gc_possible_root(garbage TSRMLS_CC);
}
} else {
ZVAL_COPY_VALUE(variable_ptr, value);
/* IS_CONST can't be IS_OBJECT, IS_RESOURCE or IS_REFERENCE */
if (UNEXPECTED(Z_OPT_COPYABLE_P(variable_ptr))) {
zval_copy_ctor_func(variable_ptr);
}
_zval_dtor_func(garbage ZEND_FILE_LINE_CC);
return variable_ptr;
}
}
ZVAL_COPY_VALUE(variable_ptr, value);
/* IS_CONST can't be IS_OBJECT, IS_RESOURCE or IS_REFERENCE */
if (UNEXPECTED(Z_OPT_COPYABLE_P(variable_ptr))) {
zval_copy_ctor_func(variable_ptr);
}
return variable_ptr;
}
static inline zval* zend_assign_to_variable(zval *variable_ptr, zval *value TSRMLS_DC)
{
zend_refcounted *garbage;
if (EXPECTED(!Z_REFCOUNTED_P(variable_ptr))) {
goto assign_simple;
} else if (UNEXPECTED(variable_ptr == value)) {
return variable_ptr;
}
if (Z_ISREF_P(variable_ptr)) {
variable_ptr = Z_REFVAL_P(variable_ptr);
if (EXPECTED(!Z_REFCOUNTED_P(variable_ptr))) {
goto assign_simple;
}
}
if (Z_TYPE_P(variable_ptr) == IS_OBJECT &&
UNEXPECTED(Z_OBJ_HANDLER_P(variable_ptr, set) != NULL)) {
Z_OBJ_HANDLER_P(variable_ptr, set)(variable_ptr, value TSRMLS_CC);
} else if (EXPECTED(variable_ptr != value)) {
if (Z_REFCOUNT_P(variable_ptr)==1) {
garbage = Z_COUNTED_P(variable_ptr);
if (EXPECTED(!Z_ISREF_P(value))) {
ZVAL_COPY(variable_ptr, value);
} else {
if (Z_REFCOUNT_P(value) == 1) {
ZVAL_UNREF(value);
ZVAL_COPY(variable_ptr, value);
} else {
ZVAL_COPY(variable_ptr, Z_REFVAL_P(value));
}
}
_zval_dtor_func(garbage ZEND_FILE_LINE_CC);
} else { /* we need to split */
Z_DELREF_P(variable_ptr);
GC_ZVAL_CHECK_POSSIBLE_ROOT(variable_ptr);
assign_simple:
if (EXPECTED(!Z_ISREF_P(value))) {
ZVAL_COPY(variable_ptr, value);
} else {
if (Z_REFCOUNT_P(value) == 1) {
ZVAL_UNREF(value);
ZVAL_COPY(variable_ptr, value);
} else {
ZVAL_COPY(variable_ptr, Z_REFVAL_P(value));
}
}
}
}
return variable_ptr;
}
/* Utility Functions for Extensions */
static void zend_extension_statement_handler(const 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(const 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(const zend_extension *extension, zend_op_array *op_array TSRMLS_DC)
{
if (extension->fcall_end_handler) {
extension->fcall_end_handler(op_array);
}
}
static zend_always_inline HashTable *zend_get_target_symbol_table(int fetch_type TSRMLS_DC)
{
HashTable *ht;
if (EXPECTED(fetch_type == ZEND_FETCH_GLOBAL_LOCK) ||
EXPECTED(fetch_type == ZEND_FETCH_GLOBAL)) {
ht = &EG(symbol_table).ht;
} else if (EXPECTED(fetch_type == ZEND_FETCH_STATIC)) {
ZEND_ASSERT(EG(active_op_array)->static_variables != NULL);
ht = EG(active_op_array)->static_variables;
} else {
ZEND_ASSERT(fetch_type == ZEND_FETCH_LOCAL);
if (!EG(active_symbol_table)) {
zend_rebuild_symbol_table(TSRMLS_C);
}
ht = &EG(active_symbol_table)->ht;
}
return ht;
}
static zend_always_inline zval *zend_fetch_dimension_address_inner(HashTable *ht, const zval *dim, int dim_type, int type TSRMLS_DC)
{
zval *retval;
zend_string *offset_key;
ulong hval;
if (EXPECTED(Z_TYPE_P(dim) == IS_LONG)) {
hval = Z_LVAL_P(dim);
num_index:
retval = zend_hash_index_find(ht, hval);
if (retval == NULL) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE,"Undefined offset: %ld", hval);
/* break missing intentionally */
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined offset: %ld", hval);
/* break missing intentionally */
case BP_VAR_W:
retval = zend_hash_index_add_new(ht, hval, &EG(uninitialized_zval));
break;
}
}
} else if (EXPECTED(Z_TYPE_P(dim) == IS_STRING)) {
offset_key = Z_STR_P(dim);
if (dim_type != IS_CONST) {
if (ZEND_HANDLE_NUMERIC(offset_key, hval)) {
goto num_index;
}
}
str_index:
retval = zend_hash_find(ht, offset_key);
if (retval) {
/* support for $GLOBALS[...] */
if (UNEXPECTED(Z_TYPE_P(retval) == IS_INDIRECT)) {
retval = Z_INDIRECT_P(retval);
if (UNEXPECTED(Z_TYPE_P(retval) == IS_UNDEF)) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE, "Undefined index: %s", offset_key->val);
/* break missing intentionally */
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined index: %s", offset_key->val);
/* break missing intentionally */
case BP_VAR_W:
ZVAL_NULL(retval);
break;
}
}
}
} else {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE, "Undefined index: %s", offset_key->val);
/* break missing intentionally */
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined index: %s", offset_key->val);
/* break missing intentionally */
case BP_VAR_W:
retval = zend_hash_add_new(ht, offset_key, &EG(uninitialized_zval));
break;
}
}
} else {
switch (Z_TYPE_P(dim)) {
case IS_NULL:
offset_key = STR_EMPTY_ALLOC();
goto str_index;
case IS_DOUBLE:
hval = zend_dval_to_lval(Z_DVAL_P(dim));
goto num_index;
case IS_RESOURCE:
zend_error(E_STRICT, "Resource ID#%ld used as offset, casting to integer (%ld)", Z_RES_HANDLE_P(dim), Z_RES_HANDLE_P(dim));
hval = Z_RES_HANDLE_P(dim);
goto num_index;
case IS_FALSE:
hval = 0;
goto num_index;
case IS_TRUE:
hval = 1;
goto num_index;
default:
zend_error(E_WARNING, "Illegal offset type");
retval = (type == BP_VAR_W || type == BP_VAR_RW) ?
&EG(error_zval) : &EG(uninitialized_zval);
}
}
return retval;
}
static zend_always_inline void zend_fetch_dimension_address(zval *result, zval *container_ptr, zval *dim, int dim_type, int type, int is_ref TSRMLS_DC)
{
zval *retval;
zval *container = container_ptr;
ZVAL_DEREF(container);
if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
SEPARATE_ARRAY(container);
fetch_from_array:
if (dim == NULL) {
retval = zend_hash_next_index_insert(Z_ARRVAL_P(container), &EG(uninitialized_zval));
if (retval == NULL) {
zend_error(E_WARNING, "Cannot add element to the array as the next element is already occupied");
retval = &EG(error_zval);
}
} else {
retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type TSRMLS_CC);
}
if (is_ref) {
ZVAL_MAKE_REF(retval);
Z_ADDREF_P(retval);
ZVAL_REF(result, Z_REF_P(retval));
} else {
ZVAL_INDIRECT(result, retval);
}
} else if (EXPECTED(Z_TYPE_P(container) == IS_STRING)) {
long offset;
if (type != BP_VAR_UNSET && UNEXPECTED(Z_STRLEN_P(container) == 0)) {
convert_to_array:
zval_dtor(container);
array_init(container);
goto fetch_from_array;
}
if (dim == NULL) {
zend_error_noreturn(E_ERROR, "[] operator not supported for strings");
}
if (type != BP_VAR_UNSET) {
SEPARATE_STRING(container);
}
if (UNEXPECTED(Z_TYPE_P(dim) != IS_LONG)) {
switch(Z_TYPE_P(dim)) {
case IS_STRING:
if (IS_LONG == is_numeric_string(Z_STRVAL_P(dim), Z_STRLEN_P(dim), NULL, NULL, -1)) {
break;
}
if (type != BP_VAR_UNSET) {
zend_error(E_WARNING, "Illegal string offset '%s'", Z_STRVAL_P(dim));
}
break;
case IS_DOUBLE:
case IS_NULL:
case IS_FALSE:
case IS_TRUE:
zend_error(E_NOTICE, "String offset cast occurred");
break;
default:
zend_error(E_WARNING, "Illegal offset type");
break;
}
offset = zval_get_long(dim);
} else {
offset = Z_LVAL_P(dim);
}
if (!IS_INTERNED(Z_STR_P(container))) STR_ADDREF(Z_STR_P(container));
ZVAL_STR_OFFSET(result, container, offset);
} else if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
if (!Z_OBJ_HT_P(container)->read_dimension) {
zend_error_noreturn(E_ERROR, "Cannot use object as array");
} else {
retval = Z_OBJ_HT_P(container)->read_dimension(container, dim, type, result TSRMLS_CC);
if (UNEXPECTED(retval == &EG(uninitialized_zval))) {
ZVAL_NULL(result);
} else if (retval && Z_TYPE_P(retval) != IS_UNDEF) {
if (!Z_ISREF_P(retval)) {
if (Z_REFCOUNTED_P(retval) &&
Z_REFCOUNT_P(retval) > 1) {
if (Z_TYPE_P(retval) != IS_OBJECT) {
Z_DELREF_P(retval);
ZVAL_DUP(result, retval);
retval = result;
} else {
ZVAL_COPY(result, retval);
retval = result;
}
}
if (Z_TYPE_P(retval) != IS_OBJECT) {
zend_class_entry *ce = Z_OBJCE_P(container);
zend_error(E_NOTICE, "Indirect modification of overloaded element of %s has no effect", ce->name->val);
}
}
if (result != retval) {
if (is_ref) {
ZVAL_MAKE_REF(retval);
Z_ADDREF_P(retval);
ZVAL_REF(result, Z_REF_P(retval));
} else {
ZVAL_INDIRECT(result, retval);
}
}
} else {
ZVAL_INDIRECT(result, &EG(error_zval));
}
}
} else if (EXPECTED(Z_TYPE_P(container) == IS_NULL)) {
if (container == &EG(error_zval)) {
ZVAL_INDIRECT(result, &EG(error_zval));
} else if (type != BP_VAR_UNSET) {
goto convert_to_array;
} else {
/* for read-mode only */
ZVAL_NULL(result);
}
} else {
if (type != BP_VAR_UNSET &&
Z_TYPE_P(container) == IS_FALSE) {
goto convert_to_array;
}
if (type == BP_VAR_UNSET) {
zend_error(E_WARNING, "Cannot unset offset in a non-array variable");
ZVAL_NULL(result);
} else {
zend_error(E_WARNING, "Cannot use a scalar value as an array");
ZVAL_INDIRECT(result, &EG(error_zval));
}
}
}
static zend_never_inline void zend_fetch_dimension_address_W(zval *result, zval *container_ptr, zval *dim, int dim_type TSRMLS_DC)
{
zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_W, 0 TSRMLS_CC);
}
static zend_never_inline void zend_fetch_dimension_address_W_ref(zval *result, zval *container_ptr, zval *dim, int dim_type TSRMLS_DC)
{
zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_W, 1 TSRMLS_CC);
}
static zend_never_inline void zend_fetch_dimension_address_RW(zval *result, zval *container_ptr, zval *dim, int dim_type TSRMLS_DC)
{
zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_RW, 0 TSRMLS_CC);
}
static zend_never_inline void zend_fetch_dimension_address_UNSET(zval *result, zval *container_ptr, zval *dim, int dim_type TSRMLS_DC)
{
zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_UNSET, 0 TSRMLS_CC);
}
static zend_always_inline void zend_fetch_dimension_address_read(zval *result, zval *container, zval *dim, int dim_type, int type TSRMLS_DC)
{
zval *retval;
ZVAL_DEREF(container);
if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type TSRMLS_CC);
ZVAL_COPY(result, retval);
} else if (EXPECTED(Z_TYPE_P(container) == IS_STRING)) {
long offset;
if (UNEXPECTED(Z_TYPE_P(dim) != IS_LONG)) {
switch(Z_TYPE_P(dim)) {
/* case IS_LONG: */
case IS_STRING:
if (IS_LONG == is_numeric_string(Z_STRVAL_P(dim), Z_STRLEN_P(dim), NULL, NULL, -1)) {
break;
}
if (type != BP_VAR_IS) {
zend_error(E_WARNING, "Illegal string offset '%s'", Z_STRVAL_P(dim));
}
break;
case IS_DOUBLE:
case IS_NULL:
case IS_FALSE:
case IS_TRUE:
if (type != BP_VAR_IS) {
zend_error(E_NOTICE, "String offset cast occurred");
}
break;
default:
zend_error(E_WARNING, "Illegal offset type");
break;
}
offset = zval_get_long(dim);
} else {
offset = Z_LVAL_P(dim);
}
if (UNEXPECTED(offset < 0) || UNEXPECTED(Z_STRLEN_P(container) <= offset)) {
if (type != BP_VAR_IS) {
zend_error(E_NOTICE, "Uninitialized string offset: %ld", offset);
}
ZVAL_EMPTY_STRING(result);
} else {
zend_uchar c = (zend_uchar)Z_STRVAL_P(container)[offset];
if (CG(one_char_string)[c]) {
ZVAL_INT_STR(result, CG(one_char_string)[c]);
} else {
ZVAL_NEW_STR(result, STR_INIT(Z_STRVAL_P(container) + offset, 1, 0));
}
}
} else if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
if (!Z_OBJ_HT_P(container)->read_dimension) {
zend_error_noreturn(E_ERROR, "Cannot use object as array");
} else {
retval = Z_OBJ_HT_P(container)->read_dimension(container, dim, type, result TSRMLS_CC);
if (result) {
if (retval) {
if (result != retval) {
ZVAL_COPY(result, retval);
}
} else {
ZVAL_NULL(result);
}
}
}
} else {
ZVAL_NULL(result);
}
}
static zend_never_inline void zend_fetch_dimension_address_read_R(zval *result, zval *container, zval *dim, int dim_type TSRMLS_DC)
{
zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_R TSRMLS_CC);
}
static zend_never_inline void zend_fetch_dimension_address_read_IS(zval *result, zval *container, zval *dim, int dim_type TSRMLS_DC)
{
zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_IS TSRMLS_CC);
}
static void zend_fetch_property_address(zval *result, zval *container_ptr, zval *prop_ptr, zend_uint cache_slot, int type, int is_ref TSRMLS_DC)
{
zval *container = container_ptr;
ZVAL_DEREF(container);
if (Z_TYPE_P(container) != IS_OBJECT) {
if (container == &EG(error_zval)) {
ZVAL_INDIRECT(result, &EG(error_zval));
return;
}
/* this should modify object only if it's empty */
if (type != BP_VAR_UNSET &&
((Z_TYPE_P(container) == IS_NULL ||
Z_TYPE_P(container) == IS_FALSE ||
(Z_TYPE_P(container) == IS_STRING && Z_STRLEN_P(container)==0)))) {
zval_ptr_dtor_nogc(container);
object_init(container);
} else {
zend_error(E_WARNING, "Attempt to modify property of non-object");
ZVAL_INDIRECT(result, &EG(error_zval));
return;
}
}
if (Z_OBJ_HT_P(container)->get_property_ptr_ptr) {
zval *ptr = Z_OBJ_HT_P(container)->get_property_ptr_ptr(container, prop_ptr, type, cache_slot TSRMLS_CC);
if (NULL == ptr) {
if (Z_OBJ_HT_P(container)->read_property &&
(ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, type, cache_slot, result TSRMLS_CC)) != NULL) {
if (ptr != result) {
if (is_ref && ptr != &EG(uninitialized_zval)) {
ZVAL_MAKE_REF(ptr);
Z_ADDREF_P(ptr);
ZVAL_REF(result, Z_REF_P(ptr));
} else {
ZVAL_INDIRECT(result, ptr);
}
}
} else {
zend_error_noreturn(E_ERROR, "Cannot access undefined property for object with overloaded property access");
}
} else {
if (is_ref) {
ZVAL_MAKE_REF(ptr);
Z_ADDREF_P(ptr);
ZVAL_REF(result, Z_REF_P(ptr));
} else {
ZVAL_INDIRECT(result, ptr);
}
}
} else if (Z_OBJ_HT_P(container)->read_property) {
zval *ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, type, cache_slot, result TSRMLS_CC);
if (ptr != result) {
if (is_ref && ptr != &EG(uninitialized_zval)) {
ZVAL_MAKE_REF(ptr);
Z_ADDREF_P(ptr);
ZVAL_REF(result, Z_REF_P(ptr));
} else {
ZVAL_INDIRECT(result, ptr);
}
}
} else {
zend_error(E_WARNING, "This object doesn't support property references");
ZVAL_INDIRECT(result, &EG(error_zval));
}
}
static inline zend_brk_cont_element* zend_brk_cont(int nest_levels, int array_offset, const zend_op_array *op_array, const zend_execute_data *execute_data TSRMLS_DC)
{
int original_nest_levels = nest_levels;
zend_brk_cont_element *jmp_to;
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:
if (!(brk_opline->extended_value & EXT_TYPE_FREE_ON_RETURN)) {
zval_ptr_dtor(EX_VAR(brk_opline->op1.var));
}
break;
case ZEND_FREE:
if (!(brk_opline->extended_value & EXT_TYPE_FREE_ON_RETURN)) {
zval_dtor(EX_VAR(brk_opline->op1.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), zend_check_symbol TSRMLS_CC); \
if (&EG(symbol_table)!=EG(active_symbol_table)) { \
zend_hash_apply(EG(active_symbol_table), zend_check_symbol TSRMLS_CC); \
}
static int zend_check_symbol(zval *pz TSRMLS_DC)
{
if (Z_TYPE_P(pz) == IS_INDIRECT) {
pz = Z_INDIRECT_P(pz);
}
if (Z_TYPE_P(pz) > 10) {
fprintf(stderr, "Warning! %x has invalid type!\n", *pz);
/* See http://support.microsoft.com/kb/190351 */
#ifdef PHP_WIN32
fflush(stderr);
#endif
} else if (Z_TYPE_P(pz) == IS_ARRAY) {
zend_hash_apply(Z_ARRVAL_P(pz), zend_check_symbol TSRMLS_CC);
} else if (Z_TYPE_P(pz) == IS_OBJECT) {
/* OBJ-TBI - doesn't support new object model! */
zend_hash_apply(Z_OBJPROP_P(pz), 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, zend_fcall_info *fci TSRMLS_DC)
{
if (fci != NULL) {
execute_data_ptr->function_state.function->internal_function.handler(
fci->param_count, fci->retval TSRMLS_CC
);
} else {
zval *return_value = EX_VAR_2(execute_data_ptr, execute_data_ptr->opline->result.var);
execute_data_ptr->function_state.function->internal_function.handler(
execute_data_ptr->opline->extended_value, return_value TSRMLS_CC
);
}
}
void zend_clean_and_cache_symbol_table(zend_array *symbol_table TSRMLS_DC) /* {{{ */
{
if (EG(symtable_cache_ptr) >= EG(symtable_cache_limit)) {
zend_hash_destroy(&symbol_table->ht);
FREE_HASHTABLE(symbol_table);
} else {
/* clean before putting into the cache, since clean
could call dtors, which could use cached hash */
zend_hash_clean(&symbol_table->ht);
*(++EG(symtable_cache_ptr)) = symbol_table;
}
}
/* }}} */
static zend_always_inline void i_free_compiled_variables(zend_execute_data *execute_data TSRMLS_DC) /* {{{ */
{
zval *cv = EX_VAR_NUM(0);
zval *end = cv + EX(op_array)->last_var;
while (cv != end) {
zval_ptr_dtor(cv);
cv++;
}
}
/* }}} */
void zend_free_compiled_variables(zend_execute_data *execute_data TSRMLS_DC) /* {{{ */
{
i_free_compiled_variables(execute_data TSRMLS_CC);
}
/* }}} */
/*
* Stack Frame Layout (the whole stack frame is allocated at once)
* ==================
*
* +========================================+
* | zend_execute_data |<---+
* | EX(function_state).arguments |--+ |
* | ... | | |
* | ARGUMENT [1] | | |
* | ... | | |
* | ARGUMENT [ARGS_NUMBER] | | |
* | ARGS_NUMBER |<-+ |
* +========================================+ |
* |
* +========================================+ |
* EG(current_execute_data) -> | zend_execute_data | |
* | EX(prev_execute_data) |----+
* +----------------------------------------+
* EX_CV_NUM(0) ---------> | VAR[0] |
* | ... |
* | VAR[op_array->last_var-1] |
* | VAR[op_array->last_var] |
* | ... |
* | VAR[op_array->last_var+op_array->T-1] |
* +----------------------------------------+
* EX(call_slots) -> | CALL_SLOT[0] |
* | ... |
* | CALL_SLOT[op_array->nested_calls-1] |
* +----------------------------------------+
* zend_vm_stack_frame_base -> | ARGUMENTS STACK [0] |
* | ... |
* zend_vm_stack_top --------> | ... |
* | ... |
* | ARGUMENTS STACK [op_array->used_stack] |
* +----------------------------------------+
*/
static zend_always_inline zend_execute_data *i_create_execute_data_from_op_array(zend_op_array *op_array, zval *return_value, vm_frame_kind frame_kind TSRMLS_DC) /* {{{ */
{
zend_execute_data *execute_data;
/*
* When allocating the execute_data, memory for compiled variables and
* temporary variables is also allocated before and after the actual
* zend_execute_data struct. In addition we also allocate space to store
* information about syntactically nested called functions and actual
* parameters. op_array->last_var specifies the number of compiled
* variables and op_array->T is the number of temporary variables. If there
* is no symbol table, then twice as much memory is allocated for compiled
* variables. In that case the first half contains zval**s and the second
* half the actual zval*s (which would otherwise be in the symbol table).
*/
size_t execute_data_size = ZEND_MM_ALIGNED_SIZE(sizeof(zend_execute_data));
size_t vars_size = ZEND_MM_ALIGNED_SIZE(sizeof(zval)) * (op_array->last_var + op_array->T);
size_t call_slots_size = ZEND_MM_ALIGNED_SIZE(sizeof(call_slot)) * op_array->nested_calls;
size_t stack_size = ZEND_MM_ALIGNED_SIZE(sizeof(zval)) * op_array->used_stack;
size_t total_size = execute_data_size + vars_size + call_slots_size + stack_size;
/*
* Normally the execute_data is allocated on the VM stack (because it does
* not actually do any allocation and thus is faster). For generators
* though this behavior would be suboptimal, because the (rather large)
* structure would have to be copied back and forth every time execution is
* suspended or resumed. That's why for generators the execution context
* is allocated using a separate VM stack, thus allowing to save and
* restore it simply by replacing a pointer. The same segment also keeps
* a copy of previous execute_data and passed parameters.
*/
if (UNEXPECTED((op_array->fn_flags & ZEND_ACC_GENERATOR) != 0)) {
/* Prepend the regular stack frame with a copy of prev_execute_data
* and the passed arguments
*/
int args_count = zend_vm_stack_get_args_count_ex(EG(current_execute_data));
size_t args_size = ZEND_MM_ALIGNED_SIZE(sizeof(zval)) * (args_count + 1);
total_size += args_size + execute_data_size;
EG(argument_stack) = zend_vm_stack_new_page((total_size + (sizeof(zval) - 1)) / sizeof(zval));
EG(argument_stack)->prev = NULL;
execute_data = (zend_execute_data*)((char*)ZEND_VM_STACK_ELEMETS(EG(argument_stack)) + execute_data_size + args_size);
/* copy prev_execute_data */
EX(prev_execute_data) = (zend_execute_data*)ZEND_VM_STACK_ELEMETS(EG(argument_stack));
memset(EX(prev_execute_data), 0, sizeof(zend_execute_data));
EX(prev_execute_data)->function_state.function = (zend_function*)op_array;
EX(prev_execute_data)->function_state.arguments = (zval*)(((char*)ZEND_VM_STACK_ELEMETS(EG(argument_stack)) + execute_data_size + args_size - sizeof(zval)));
/* copy arguments */
ZVAL_LONG(EX(prev_execute_data)->function_state.arguments, args_count);
if (args_count > 0) {
zval *arg_src = zend_vm_stack_get_arg_ex(EG(current_execute_data), 1);
zval *arg_dst = zend_vm_stack_get_arg_ex(EX(prev_execute_data), 1);
int i;
for (i = 0; i < args_count; i++) {
ZVAL_COPY(arg_dst + i, arg_src + i);
}
}
} else {
execute_data = zend_vm_stack_alloc(total_size TSRMLS_CC);
EX(prev_execute_data) = EG(current_execute_data);
}
EX(return_value) = return_value;
EX(frame_kind) = frame_kind;
ZVAL_UNDEF(&EX(old_error_reporting));
EX(delayed_exception) = NULL;
EX(call_slots) = (call_slot*)((char *)execute_data + execute_data_size + vars_size);
EX(call) = NULL;
EG(opline_ptr) = &EX(opline);
EX(opline) = UNEXPECTED((op_array->fn_flags & ZEND_ACC_INTERACTIVE) != 0) && EG(start_op) ? EG(start_op) : op_array->opcodes;
EX(function_state).function = (zend_function *) op_array;
EX(function_state).arguments = NULL;
EX(op_array) = op_array;
EX(object) = Z_OBJ(EG(This));
EX(scope) = EG(scope);
EX(called_scope) = EG(called_scope);
EX(symbol_table) = EG(active_symbol_table);
if (EX(symbol_table)) {
zend_attach_symbol_table(execute_data);
} else {
do {
/* Initialize CV variables */
zval *var = EX_VAR_NUM(0);
zval *end = var + op_array->last_var;
while (var != end) {
ZVAL_UNDEF(var);
var++;
}
} while (0);
if (op_array->this_var != -1 && Z_OBJ(EG(This))) {
ZVAL_OBJ(EX_VAR(op_array->this_var), Z_OBJ(EG(This)));
Z_ADDREF(EG(This));
}
}
if (!op_array->run_time_cache && op_array->last_cache_slot) {
op_array->run_time_cache = ecalloc(op_array->last_cache_slot, sizeof(void*));
}
EX(run_time_cache) = op_array->run_time_cache;
EG(argument_stack)->top = (zval*)zend_vm_stack_frame_base(execute_data);
EG(current_execute_data) = execute_data;
return execute_data;
}
/* }}} */
ZEND_API zend_execute_data *zend_create_execute_data_from_op_array(zend_op_array *op_array, zval *return_value, vm_frame_kind frame_kind TSRMLS_DC) /* {{{ */
{
return i_create_execute_data_from_op_array(op_array, return_value, frame_kind TSRMLS_CC);
}
/* }}} */
static zend_always_inline zend_bool zend_is_by_ref_func_arg_fetch(zend_op *opline, call_slot *call TSRMLS_DC) /* {{{ */
{
zend_uint arg_num = opline->extended_value & ZEND_FETCH_ARG_MASK;
return ARG_SHOULD_BE_SENT_BY_REF(call->fbc, arg_num);
}
/* }}} */
static zval *zend_vm_stack_push_args_with_copy(int count TSRMLS_DC) /* {{{ */
{
zend_vm_stack p = EG(argument_stack);
zend_vm_stack_extend(count + 1 TSRMLS_CC);
EG(argument_stack)->top += count;
ZVAL_LONG(EG(argument_stack)->top, count);
while (count-- > 0) {
zval *data = --p->top;
ZVAL_COPY_VALUE(ZEND_VM_STACK_ELEMETS(EG(argument_stack)) + count, data);
if (UNEXPECTED(p->top == ZEND_VM_STACK_ELEMETS(p))) {
zend_vm_stack r = p;
EG(argument_stack)->prev = p->prev;
p = p->prev;
efree(r);
}
}
return EG(argument_stack)->top++;
}
/* }}} */
static zend_always_inline zval *zend_vm_stack_push_args(int count TSRMLS_DC) /* {{{ */
{
if (UNEXPECTED(EG(argument_stack)->top - ZEND_VM_STACK_ELEMETS(EG(argument_stack)) < count)
|| UNEXPECTED(EG(argument_stack)->top == EG(argument_stack)->end)) {
return zend_vm_stack_push_args_with_copy(count TSRMLS_CC);
}
ZVAL_LONG(EG(argument_stack)->top, count);
return EG(argument_stack)->top++;
}
/* }}} */
#define ZEND_VM_NEXT_OPCODE() \
CHECK_SYMBOL_TABLES() \
ZEND_VM_INC_OPCODE(); \
ZEND_VM_CONTINUE()
#define ZEND_VM_SET_OPCODE(new_op) \
CHECK_SYMBOL_TABLES() \
OPLINE = new_op
#define ZEND_VM_SET_RELATIVE_OPCODE(opline, offset) \
CHECK_SYMBOL_TABLES() \
OPLINE = ((zend_op*)(((char*)opline)+(offset)))
#define ZEND_VM_JMP(new_op) \
if (EXPECTED(!EG(exception))) { \
ZEND_VM_SET_OPCODE(new_op); \
} else { \
LOAD_OPLINE(); \
} \
ZEND_VM_CONTINUE()
#define ZEND_VM_INC_OPCODE() \
OPLINE++
#ifdef __GNUC__
# define ZEND_VM_GUARD(name) __asm__("#" #name)
#else
# define ZEND_VM_GUARD(name)
#endif
#include "zend_vm_execute.h"
ZEND_API int zend_set_user_opcode_handler(zend_uchar opcode, user_opcode_handler_t handler)
{
if (opcode != ZEND_USER_OPCODE) {
if (handler == NULL) {
/* restore the original handler */
zend_user_opcodes[opcode] = opcode;
} else {
zend_user_opcodes[opcode] = ZEND_USER_OPCODE;
}
zend_user_opcode_handlers[opcode] = handler;
return SUCCESS;
}
return FAILURE;
}
ZEND_API user_opcode_handler_t zend_get_user_opcode_handler(zend_uchar opcode)
{
return zend_user_opcode_handlers[opcode];
}
ZEND_API zval *zend_get_zval_ptr(int op_type, const znode_op *node, const zend_execute_data *execute_data, zend_free_op *should_free, int type TSRMLS_DC) {
return get_zval_ptr(op_type, node, execute_data, should_free, type);
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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