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php-src/Zend/zend_execute.c
Nikita Popov 31a2ac470c Fix argument unpacking across stack pages 
If multiple unpacks were used (or mixed with normal arguments)
parts of the arguments could land on different stack pages. If
this occurs the arguments will now be copied to a new stack page.

The code used to do this is copied verbatim from the PHP 5.4 branch
and only modified to reduce the amount of inlined code.
2014-01-18 14:41:33 +01:00

1793 lines
57 KiB
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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_ptr(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 EX_T(offset) (*EX_TMP_VAR(execute_data, offset))
#define EX_CV(var) (*EX_CV_NUM(execute_data, var))
#define TEMP_VAR_STACK_LIMIT 2000
static zend_always_inline void zend_pzval_unlock_func(zval *z, zend_free_op *should_free, int unref TSRMLS_DC)
{
if (!Z_DELREF_P(z)) {
Z_SET_REFCOUNT_P(z, 1);
Z_UNSET_ISREF_P(z);
should_free->var = z;
/* should_free->is_var = 1; */
} else {
should_free->var = 0;
if (unref && Z_ISREF_P(z) && Z_REFCOUNT_P(z) == 1) {
Z_UNSET_ISREF_P(z);
}
}
}
static zend_always_inline void zend_pzval_unlock_free_func(zval *z TSRMLS_DC)
{
if (!Z_DELREF_P(z)) {
ZEND_ASSERT(z != &EG(uninitialized_zval));
GC_REMOVE_ZVAL_FROM_BUFFER(z);
zval_dtor(z);
efree(z);
}
}
#undef zval_ptr_dtor
#define zval_ptr_dtor(pzv) i_zval_ptr_dtor(*(pzv) ZEND_FILE_LINE_CC TSRMLS_CC)
#define zval_ptr_dtor_nogc(pzv) i_zval_ptr_dtor_nogc(*(pzv) ZEND_FILE_LINE_CC TSRMLS_CC)
#define PZVAL_UNLOCK(z, f) zend_pzval_unlock_func(z, f, 1 TSRMLS_CC)
#define PZVAL_UNLOCK_EX(z, f, u) zend_pzval_unlock_func(z, f, u TSRMLS_CC)
#define PZVAL_UNLOCK_FREE(z) zend_pzval_unlock_free_func(z TSRMLS_CC)
#define PZVAL_LOCK(z) Z_ADDREF_P((z))
#define SELECTIVE_PZVAL_LOCK(pzv, opline) if (RETURN_VALUE_USED(opline)) { PZVAL_LOCK(pzv); }
#define EXTRACT_ZVAL_PTR(t) do { \
temp_variable *__t = (t); \
__t->var.ptr = *__t->var.ptr_ptr; \
__t->var.ptr_ptr = &__t->var.ptr; \
if (!PZVAL_IS_REF(__t->var.ptr) && \
Z_REFCOUNT_P(__t->var.ptr) > 2) { \
SEPARATE_ZVAL(__t->var.ptr_ptr); \
} \
} while (0)
#define AI_SET_PTR(t, val) do { \
temp_variable *__t = (t); \
__t->var.ptr = (val); \
__t->var.ptr_ptr = &__t->var.ptr; \
} 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)
#define MAKE_REAL_ZVAL_PTR(val) \
do { \
zval *_tmp; \
ALLOC_ZVAL(_tmp); \
INIT_PZVAL_COPY(_tmp, (val)); \
(val) = _tmp; \
} while (0)
/* 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_CV(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)
{
return should_free->var = &EX_T(var).tmp_var;
}
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 *ptr = EX_T(var).var.ptr;
return should_free->var = ptr;
}
static zend_never_inline zval **_get_zval_cv_lookup(zval ***ptr, zend_uint var, int type TSRMLS_DC)
{
zend_compiled_variable *cv = &CV_DEF_OF(var);
if (!EG(active_symbol_table) ||
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:
Z_ADDREF(EG(uninitialized_zval));
if (!EG(active_symbol_table)) {
*ptr = (zval**)EX_CV_NUM(EG(current_execute_data), EG(active_op_array)->last_var + var);
**ptr = &EG(uninitialized_zval);
} else {
zend_hash_quick_update(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, &EG(uninitialized_zval_ptr), sizeof(zval *), (void **)ptr);
}
break;
}
}
return *ptr;
}
static zend_never_inline zval **_get_zval_cv_lookup_BP_VAR_R(zval ***ptr, zend_uint var TSRMLS_DC)
{
zend_compiled_variable *cv = &CV_DEF_OF(var);
if (!EG(active_symbol_table) ||
zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
return &EG(uninitialized_zval_ptr);
}
return *ptr;
}
static zend_never_inline zval **_get_zval_cv_lookup_BP_VAR_UNSET(zval ***ptr, zend_uint var TSRMLS_DC)
{
zend_compiled_variable *cv = &CV_DEF_OF(var);
if (!EG(active_symbol_table) ||
zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
return &EG(uninitialized_zval_ptr);
}
return *ptr;
}
static zend_never_inline zval **_get_zval_cv_lookup_BP_VAR_IS(zval ***ptr, zend_uint var TSRMLS_DC)
{
zend_compiled_variable *cv = &CV_DEF_OF(var);
if (!EG(active_symbol_table) ||
zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
return &EG(uninitialized_zval_ptr);
}
return *ptr;
}
static zend_never_inline zval **_get_zval_cv_lookup_BP_VAR_RW(zval ***ptr, zend_uint var TSRMLS_DC)
{
zend_compiled_variable *cv = &CV_DEF_OF(var);
if (!EG(active_symbol_table)) {
Z_ADDREF(EG(uninitialized_zval));
*ptr = (zval**)EX_CV_NUM(EG(current_execute_data), EG(active_op_array)->last_var + var);
**ptr = &EG(uninitialized_zval);
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
} else if (zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
Z_ADDREF(EG(uninitialized_zval));
zend_hash_quick_update(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, &EG(uninitialized_zval_ptr), sizeof(zval *), (void **)ptr);
zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
}
return *ptr;
}
static zend_never_inline zval **_get_zval_cv_lookup_BP_VAR_W(zval ***ptr, zend_uint var TSRMLS_DC)
{
zend_compiled_variable *cv = &CV_DEF_OF(var);
if (!EG(active_symbol_table)) {
Z_ADDREF(EG(uninitialized_zval));
*ptr = (zval**)EX_CV_NUM(EG(current_execute_data), EG(active_op_array)->last_var + var);
**ptr = &EG(uninitialized_zval);
} else if (zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
Z_ADDREF(EG(uninitialized_zval));
zend_hash_quick_update(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, &EG(uninitialized_zval_ptr), sizeof(zval *), (void **)ptr);
}
return *ptr;
}
static zend_always_inline zval *_get_zval_ptr_cv(zend_uint var, int type TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(EG(current_execute_data), var);
if (UNEXPECTED(*ptr == NULL)) {
return *_get_zval_cv_lookup(ptr, var, type TSRMLS_CC);
}
return **ptr;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_R(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);
if (UNEXPECTED(*ptr == NULL)) {
return *_get_zval_cv_lookup_BP_VAR_R(ptr, var TSRMLS_CC);
}
return **ptr;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_UNSET(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);
if (UNEXPECTED(*ptr == NULL)) {
return *_get_zval_cv_lookup_BP_VAR_UNSET(ptr, var TSRMLS_CC);
}
return **ptr;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_IS(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);
if (UNEXPECTED(*ptr == NULL)) {
return *_get_zval_cv_lookup_BP_VAR_IS(ptr, var TSRMLS_CC);
}
return **ptr;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_RW(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);
if (UNEXPECTED(*ptr == NULL)) {
return *_get_zval_cv_lookup_BP_VAR_RW(ptr, var TSRMLS_CC);
}
return **ptr;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_W(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);
if (UNEXPECTED(*ptr == NULL)) {
return *_get_zval_cv_lookup_BP_VAR_W(ptr, var TSRMLS_CC);
}
return **ptr;
}
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)
{
/* should_free->is_var = 0; */
switch (op_type) {
case IS_CONST:
should_free->var = 0;
return node->zv;
break;
case IS_TMP_VAR:
should_free->var = TMP_FREE(&EX_T(node->var).tmp_var);
return &EX_T(node->var).tmp_var;
break;
case IS_VAR:
return _get_zval_ptr_var(node->var, execute_data, 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->var, type TSRMLS_CC);
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
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** ptr_ptr = EX_T(var).var.ptr_ptr;
if (EXPECTED(ptr_ptr != NULL)) {
PZVAL_UNLOCK(*ptr_ptr, should_free);
} else {
/* string offset */
PZVAL_UNLOCK(EX_T(var).str_offset.str, should_free);
}
return ptr_ptr;
}
static zend_always_inline zval **_get_zval_ptr_ptr_var_fast(zend_uint var, const zend_execute_data *execute_data, zend_free_op *should_free TSRMLS_DC)
{
zval** ptr_ptr = EX_T(var).var.ptr_ptr;
if (EXPECTED(ptr_ptr != NULL)) {
should_free->var = *ptr_ptr;
} else {
/* string offset */
should_free->var = EX_T(var).str_offset.str;
}
return ptr_ptr;
}
static zend_always_inline zval **_get_zval_ptr_ptr_cv(zend_uint var, int type TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(EG(current_execute_data), var);
if (UNEXPECTED(*ptr == NULL)) {
return _get_zval_cv_lookup(ptr, var, type TSRMLS_CC);
}
return *ptr;
}
static zend_always_inline zval **_get_zval_ptr_ptr_cv_BP_VAR_R(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);
if (UNEXPECTED(*ptr == NULL)) {
return _get_zval_cv_lookup_BP_VAR_R(ptr, var TSRMLS_CC);
}
return *ptr;
}
static zend_always_inline zval **_get_zval_ptr_ptr_cv_BP_VAR_UNSET(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);
if (UNEXPECTED(*ptr == NULL)) {
return _get_zval_cv_lookup_BP_VAR_UNSET(ptr, var TSRMLS_CC);
}
return *ptr;
}
static zend_always_inline zval **_get_zval_ptr_ptr_cv_BP_VAR_IS(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);
if (UNEXPECTED(*ptr == NULL)) {
return _get_zval_cv_lookup_BP_VAR_IS(ptr, var TSRMLS_CC);
}
return *ptr;
}
static zend_always_inline zval **_get_zval_ptr_ptr_cv_BP_VAR_RW(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);
if (UNEXPECTED(*ptr == NULL)) {
return _get_zval_cv_lookup_BP_VAR_RW(ptr, var TSRMLS_CC);
}
return *ptr;
}
static zend_always_inline zval **_get_zval_ptr_ptr_cv_BP_VAR_W(const zend_execute_data *execute_data, zend_uint var TSRMLS_DC)
{
zval ***ptr = EX_CV_NUM(execute_data, var);
if (UNEXPECTED(*ptr == NULL)) {
return _get_zval_cv_lookup_BP_VAR_W(ptr, var TSRMLS_CC);
}
return *ptr;
}
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 = 0;
return _get_zval_ptr_ptr_cv(node->var, type TSRMLS_CC);
} else if (op_type == IS_VAR) {
return _get_zval_ptr_ptr_var(node->var, execute_data, should_free TSRMLS_CC);
} else {
should_free->var = 0;
return NULL;
}
}
static zend_always_inline zval *_get_obj_zval_ptr_unused(TSRMLS_D)
{
if (EXPECTED(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_ptr(int op_type, const 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(EG(This) != NULL)) {
/* 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_type, op, execute_data, should_free, type);
}
static zend_always_inline zval **_get_obj_zval_ptr_ptr_unused(TSRMLS_D)
{
if (EXPECTED(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(EG(This) != NULL)) {
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_type, op, execute_data, should_free, type);
}
static void zend_assign_to_variable_reference(zval **variable_ptr_ptr, zval **value_ptr_ptr TSRMLS_DC)
{
zval *variable_ptr = *variable_ptr_ptr;
zval *value_ptr = *value_ptr_ptr;
if (variable_ptr == &EG(error_zval) || value_ptr == &EG(error_zval)) {
variable_ptr_ptr = &EG(uninitialized_zval_ptr);
} else if (variable_ptr != value_ptr) {
if (!PZVAL_IS_REF(value_ptr)) {
/* break it away */
Z_DELREF_P(value_ptr);
if (Z_REFCOUNT_P(value_ptr)>0) {
ALLOC_ZVAL(*value_ptr_ptr);
ZVAL_COPY_VALUE(*value_ptr_ptr, value_ptr);
value_ptr = *value_ptr_ptr;
zendi_zval_copy_ctor(*value_ptr);
}
Z_SET_REFCOUNT_P(value_ptr, 1);
Z_SET_ISREF_P(value_ptr);
}
*variable_ptr_ptr = value_ptr;
Z_ADDREF_P(value_ptr);
zval_ptr_dtor(&variable_ptr);
} else if (!Z_ISREF_P(variable_ptr)) {
if (variable_ptr_ptr == value_ptr_ptr) {
SEPARATE_ZVAL(variable_ptr_ptr);
} else if (variable_ptr==&EG(uninitialized_zval)
|| Z_REFCOUNT_P(variable_ptr)>2) {
/* we need to separate */
Z_SET_REFCOUNT_P(variable_ptr, Z_REFCOUNT_P(variable_ptr) - 2);
ALLOC_ZVAL(*variable_ptr_ptr);
ZVAL_COPY_VALUE(*variable_ptr_ptr, variable_ptr);
zval_copy_ctor(*variable_ptr_ptr);
*value_ptr_ptr = *variable_ptr_ptr;
Z_SET_REFCOUNT_PP(variable_ptr_ptr, 2);
}
Z_SET_ISREF_PP(variable_ptr_ptr);
}
}
/* this should modify object only if it's empty */
static inline void make_real_object(zval **object_ptr TSRMLS_DC)
{
if (Z_TYPE_PP(object_ptr) == IS_NULL
|| (Z_TYPE_PP(object_ptr) == IS_BOOL && Z_LVAL_PP(object_ptr) == 0)
|| (Z_TYPE_PP(object_ptr) == IS_STRING && Z_STRLEN_PP(object_ptr) == 0)
) {
SEPARATE_ZVAL_IF_NOT_REF(object_ptr);
zval_dtor(*object_ptr);
object_init(*object_ptr);
zend_error(E_WARNING, "Creating default object from empty value");
}
}
ZEND_API char * zend_verify_arg_class_kind(const zend_arg_info *cur_arg_info, ulong fetch_type, const char **class_name, zend_class_entry **pce TSRMLS_DC)
{
*pce = zend_fetch_class(cur_arg_info->class_name, cur_arg_info->class_name_len, (fetch_type | ZEND_FETCH_CLASS_AUTO | ZEND_FETCH_CLASS_NO_AUTOLOAD) TSRMLS_CC);
*class_name = (*pce) ? (*pce)->name: cur_arg_info->class_name;
if (*pce && (*pce)->ce_flags & ZEND_ACC_INTERFACE) {
return "implement interface ";
} else {
return "be an instance of ";
}
}
ZEND_API int 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;
char *fsep;
const char *fclass;
if (zf->common.scope) {
fsep = "::";
fclass = zf->common.scope->name;
} 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, 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);
}
return 0;
}
static inline int 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 (!zf->common.arg_info) {
return 1;
}
if (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) {
const char *class_name;
if (!arg) {
need_msg = zend_verify_arg_class_kind(cur_arg_info, fetch_type, &class_name, &ce TSRMLS_CC);
return zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, need_msg, class_name, "none", "" TSRMLS_CC);
}
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)) {
return zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, need_msg, class_name, "instance of ", Z_OBJCE_P(arg)->name 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);
return 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:
if (!arg) {
return zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be of the type array", "", "none", "" TSRMLS_CC);
}
if (Z_TYPE_P(arg) != IS_ARRAY && (Z_TYPE_P(arg) != IS_NULL || !cur_arg_info->allow_null)) {
return 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 (!arg) {
return zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be callable", "", "none", "" TSRMLS_CC);
}
if (!zend_is_callable(arg, IS_CALLABLE_CHECK_SILENT, NULL TSRMLS_CC) && (Z_TYPE_P(arg) != IS_NULL || !cur_arg_info->allow_null)) {
return 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");
}
}
return 1;
}
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, const zend_literal *key TSRMLS_DC)
{
zval *object = *object_ptr;
zend_free_op free_value;
zval *value = get_zval_ptr(value_type, value_op, execute_data, &free_value, BP_VAR_R);
if (Z_TYPE_P(object) != IS_OBJECT) {
if (object == &EG(error_zval)) {
if (retval) {
*retval = &EG(uninitialized_zval);
PZVAL_LOCK(*retval);
}
FREE_OP(free_value);
return;
}
if (Z_TYPE_P(object) == IS_NULL ||
(Z_TYPE_P(object) == IS_BOOL && Z_LVAL_P(object) == 0) ||
(Z_TYPE_P(object) == IS_STRING && Z_STRLEN_P(object) == 0)) {
SEPARATE_ZVAL_IF_NOT_REF(object_ptr);
object = *object_ptr;
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) {
*retval = &EG(uninitialized_zval);
PZVAL_LOCK(*retval);
}
FREE_OP(free_value);
return;
}
Z_DELREF_P(object);
zval_dtor(object);
object_init(object);
} else {
zend_error(E_WARNING, "Attempt to assign property of non-object");
if (retval) {
*retval = &EG(uninitialized_zval);
PZVAL_LOCK(*retval);
}
FREE_OP(free_value);
return;
}
}
/* separate our value if necessary */
if (value_type == IS_TMP_VAR) {
zval *orig_value = value;
ALLOC_ZVAL(value);
ZVAL_COPY_VALUE(value, orig_value);
Z_UNSET_ISREF_P(value);
Z_SET_REFCOUNT_P(value, 0);
} else if (value_type == IS_CONST) {
zval *orig_value = value;
ALLOC_ZVAL(value);
ZVAL_COPY_VALUE(value, orig_value);
Z_UNSET_ISREF_P(value);
Z_SET_REFCOUNT_P(value, 0);
zval_copy_ctor(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) {
*retval = &EG(uninitialized_zval);
PZVAL_LOCK(&EG(uninitialized_zval));
}
if (value_type == IS_TMP_VAR) {
FREE_ZVAL(value);
} else 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, key 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)) {
*retval = value;
PZVAL_LOCK(value);
}
zval_ptr_dtor(&value);
FREE_OP_IF_VAR(free_value);
}
static inline int zend_assign_to_string_offset(const temp_variable *T, const zval *value, int value_type TSRMLS_DC)
{
zval *str = T->str_offset.str;
zend_uint offset = T->str_offset.offset;
if (Z_TYPE_P(str) == IS_STRING) {
if ((int)offset < 0) {
zend_error(E_WARNING, "Illegal string offset: %d", offset);
return 0;
}
if (offset >= Z_STRLEN_P(str)) {
Z_STRVAL_P(str) = str_erealloc(Z_STRVAL_P(str), offset+1+1);
memset(Z_STRVAL_P(str) + Z_STRLEN_P(str), ' ', offset - Z_STRLEN_P(str));
Z_STRVAL_P(str)[offset+1] = 0;
Z_STRLEN_P(str) = offset+1;
} else if (IS_INTERNED(Z_STRVAL_P(str))) {
Z_STRVAL_P(str) = estrndup(Z_STRVAL_P(str), Z_STRLEN_P(str));
}
if (Z_TYPE_P(value) != IS_STRING) {
zval tmp;
ZVAL_COPY_VALUE(&tmp, value);
if (value_type != IS_TMP_VAR) {
zval_copy_ctor(&tmp);
}
convert_to_string(&tmp);
Z_STRVAL_P(str)[offset] = Z_STRVAL(tmp)[0];
str_efree(Z_STRVAL(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 */
str_efree(Z_STRVAL_P(value));
}
}
/*
* the value of an assignment to a string offset is undefined
T(result->u.var).var = &T->str_offset.str;
*/
}
return 1;
}
static inline zval* zend_assign_tmp_to_variable(zval **variable_ptr_ptr, zval *value TSRMLS_DC)
{
zval *variable_ptr = *variable_ptr_ptr;
zval 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_ptr, value TSRMLS_CC);
return variable_ptr;
}
if (UNEXPECTED(Z_REFCOUNT_P(variable_ptr) > 1) &&
EXPECTED(!PZVAL_IS_REF(variable_ptr))) {
/* we need to split */
Z_DELREF_P(variable_ptr);
GC_ZVAL_CHECK_POSSIBLE_ROOT(variable_ptr);
ALLOC_ZVAL(variable_ptr);
INIT_PZVAL_COPY(variable_ptr, value);
*variable_ptr_ptr = variable_ptr;
return variable_ptr;
} else {
if (EXPECTED(Z_TYPE_P(variable_ptr) <= IS_BOOL)) {
/* nothing to destroy */
ZVAL_COPY_VALUE(variable_ptr, value);
} else {
ZVAL_COPY_VALUE(&garbage, variable_ptr);
ZVAL_COPY_VALUE(variable_ptr, value);
_zval_dtor_func(&garbage ZEND_FILE_LINE_CC);
}
return variable_ptr;
}
}
static inline zval* zend_assign_const_to_variable(zval **variable_ptr_ptr, zval *value TSRMLS_DC)
{
zval *variable_ptr = *variable_ptr_ptr;
zval 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_ptr, value TSRMLS_CC);
return variable_ptr;
}
if (UNEXPECTED(Z_REFCOUNT_P(variable_ptr) > 1) &&
EXPECTED(!PZVAL_IS_REF(variable_ptr))) {
/* we need to split */
Z_DELREF_P(variable_ptr);
GC_ZVAL_CHECK_POSSIBLE_ROOT(variable_ptr);
ALLOC_ZVAL(variable_ptr);
INIT_PZVAL_COPY(variable_ptr, value);
zval_copy_ctor(variable_ptr);
*variable_ptr_ptr = variable_ptr;
return variable_ptr;
} else {
if (EXPECTED(Z_TYPE_P(variable_ptr) <= IS_BOOL)) {
/* nothing to destroy */
ZVAL_COPY_VALUE(variable_ptr, value);
zendi_zval_copy_ctor(*variable_ptr);
} else {
ZVAL_COPY_VALUE(&garbage, variable_ptr);
ZVAL_COPY_VALUE(variable_ptr, value);
zendi_zval_copy_ctor(*variable_ptr);
_zval_dtor_func(&garbage ZEND_FILE_LINE_CC);
}
return variable_ptr;
}
}
static inline zval* zend_assign_to_variable(zval **variable_ptr_ptr, zval *value TSRMLS_DC)
{
zval *variable_ptr = *variable_ptr_ptr;
zval 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_ptr, value TSRMLS_CC);
return variable_ptr;
}
if (EXPECTED(!PZVAL_IS_REF(variable_ptr))) {
if (Z_REFCOUNT_P(variable_ptr)==1) {
if (UNEXPECTED(variable_ptr == value)) {
return variable_ptr;
} else if (EXPECTED(!PZVAL_IS_REF(value))) {
Z_ADDREF_P(value);
*variable_ptr_ptr = value;
ZEND_ASSERT(variable_ptr != &EG(uninitialized_zval));
GC_REMOVE_ZVAL_FROM_BUFFER(variable_ptr);
zval_dtor(variable_ptr);
efree(variable_ptr);
return value;
} else {
goto copy_value;
}
} else { /* we need to split */
Z_DELREF_P(variable_ptr);
GC_ZVAL_CHECK_POSSIBLE_ROOT(variable_ptr);
if (PZVAL_IS_REF(value)) {
ALLOC_ZVAL(variable_ptr);
*variable_ptr_ptr = variable_ptr;
INIT_PZVAL_COPY(variable_ptr, value);
zval_copy_ctor(variable_ptr);
return variable_ptr;
} else {
*variable_ptr_ptr = value;
Z_ADDREF_P(value);
return value;
}
}
} else {
if (EXPECTED(variable_ptr != value)) {
copy_value:
if (EXPECTED(Z_TYPE_P(variable_ptr) <= IS_BOOL)) {
/* nothing to destroy */
ZVAL_COPY_VALUE(variable_ptr, value);
zendi_zval_copy_ctor(*variable_ptr);
} else {
ZVAL_COPY_VALUE(&garbage, variable_ptr);
ZVAL_COPY_VALUE(variable_ptr, value);
zendi_zval_copy_ctor(*variable_ptr);
_zval_dtor_func(&garbage ZEND_FILE_LINE_CC);
}
}
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 inline HashTable *zend_get_target_symbol_table(int fetch_type TSRMLS_DC)
{
switch (fetch_type) {
case ZEND_FETCH_LOCAL:
if (!EG(active_symbol_table)) {
zend_rebuild_symbol_table(TSRMLS_C);
}
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, const zval *dim, int dim_type, int type TSRMLS_DC)
{
zval **retval;
char *offset_key;
int offset_key_length;
ulong hval;
switch (dim->type) {
case IS_NULL:
offset_key = "";
offset_key_length = 0;
hval = zend_inline_hash_func("", 1);
goto fetch_string_dim;
case IS_STRING:
offset_key = dim->value.str.val;
offset_key_length = dim->value.str.len;
if (dim_type == IS_CONST) {
hval = Z_HASH_P(dim);
} else {
ZEND_HANDLE_NUMERIC_EX(offset_key, offset_key_length+1, hval, goto num_index);
hval = str_hash(offset_key, offset_key_length);
}
fetch_string_dim:
if (zend_hash_quick_find(ht, offset_key, offset_key_length+1, hval, (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);
Z_ADDREF_P(new_zval);
zend_hash_quick_update(ht, offset_key, offset_key_length+1, hval, &new_zval, sizeof(zval *), (void **) &retval);
}
break;
}
}
break;
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_LVAL_P(dim), Z_LVAL_P(dim));
/* Fall Through */
case IS_BOOL:
case IS_LONG:
hval = Z_LVAL_P(dim);
num_index:
if (zend_hash_index_find(ht, hval, (void **) &retval) == FAILURE) {
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_ptr);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined offset: %ld", hval);
/* break missing intentionally */
case BP_VAR_W: {
zval *new_zval = &EG(uninitialized_zval);
Z_ADDREF_P(new_zval);
zend_hash_index_update(ht, hval, &new_zval, sizeof(zval *), (void **) &retval);
}
break;
}
}
break;
default:
zend_error(E_WARNING, "Illegal offset type");
return (type == BP_VAR_W || type == BP_VAR_RW) ?
&EG(error_zval_ptr) : &EG(uninitialized_zval_ptr);
}
return retval;
}
static void zend_fetch_dimension_address(temp_variable *result, zval **container_ptr, zval *dim, int dim_type, int type TSRMLS_DC)
{
zval *container = *container_ptr;
zval **retval;
switch (Z_TYPE_P(container)) {
case IS_ARRAY:
if (type != BP_VAR_UNSET && Z_REFCOUNT_P(container)>1 && !PZVAL_IS_REF(container)) {
SEPARATE_ZVAL(container_ptr);
container = *container_ptr;
}
fetch_from_array:
if (dim == NULL) {
zval *new_zval = &EG(uninitialized_zval);
Z_ADDREF_P(new_zval);
if (zend_hash_next_index_insert(Z_ARRVAL_P(container), &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);
Z_DELREF_P(new_zval);
}
} else {
retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type TSRMLS_CC);
}
result->var.ptr_ptr = retval;
PZVAL_LOCK(*retval);
return;
break;
case IS_NULL:
if (container == &EG(error_zval)) {
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(EG(error_zval_ptr));
} else if (type != BP_VAR_UNSET) {
convert_to_array:
if (!PZVAL_IS_REF(container)) {
SEPARATE_ZVAL(container_ptr);
container = *container_ptr;
}
zval_dtor(container);
array_init(container);
goto fetch_from_array;
} else {
/* for read-mode only */
result->var.ptr_ptr = &EG(uninitialized_zval_ptr);
PZVAL_LOCK(EG(uninitialized_zval_ptr));
}
return;
break;
case IS_STRING: {
zval tmp;
if (type != BP_VAR_UNSET && Z_STRLEN_P(container)==0) {
goto convert_to_array;
}
if (dim == NULL) {
zend_error_noreturn(E_ERROR, "[] operator not supported for strings");
}
if (type != BP_VAR_UNSET) {
SEPARATE_ZVAL_IF_NOT_REF(container_ptr);
}
if (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_UNSET) {
zend_error(E_WARNING, "Illegal string offset '%s'", dim->value.str.val);
}
break;
case IS_DOUBLE:
case IS_NULL:
case IS_BOOL:
zend_error(E_NOTICE, "String offset cast occurred");
break;
default:
zend_error(E_WARNING, "Illegal offset type");
break;
}
tmp = *dim;
zval_copy_ctor(&tmp);
convert_to_long(&tmp);
dim = &tmp;
}
container = *container_ptr;
result->str_offset.str = container;
PZVAL_LOCK(container);
result->str_offset.offset = Z_LVAL_P(dim);
result->str_offset.ptr_ptr = NULL;
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_type == 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) {
if (!Z_ISREF_P(overloaded_result)) {
if (Z_REFCOUNT_P(overloaded_result) > 0) {
zval *tmp = overloaded_result;
ALLOC_ZVAL(overloaded_result);
ZVAL_COPY_VALUE(overloaded_result, tmp);
zval_copy_ctor(overloaded_result);
Z_UNSET_ISREF_P(overloaded_result);
Z_SET_REFCOUNT_P(overloaded_result, 0);
}
if (Z_TYPE_P(overloaded_result) != 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);
}
}
AI_SET_PTR(result, overloaded_result);
PZVAL_LOCK(overloaded_result);
} else {
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(EG(error_zval_ptr));
}
if (dim_type == IS_TMP_VAR) {
zval_ptr_dtor(&dim);
}
}
return;
break;
case IS_BOOL:
if (type != BP_VAR_UNSET && Z_LVAL_P(container)==0) {
goto convert_to_array;
}
/* break missing intentionally */
default:
if (type == BP_VAR_UNSET) {
zend_error(E_WARNING, "Cannot unset offset in a non-array variable");
result->var.ptr_ptr = &EG(uninitialized_zval_ptr);
PZVAL_LOCK(EG(uninitialized_zval_ptr));
} else {
zend_error(E_WARNING, "Cannot use a scalar value as an array");
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(EG(error_zval_ptr));
}
break;
}
}
static void zend_fetch_dimension_address_read(temp_variable *result, zval *container, zval *dim, int dim_type, int type TSRMLS_DC)
{
zval **retval;
switch (Z_TYPE_P(container)) {
case IS_ARRAY:
retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type TSRMLS_CC);
result->var.ptr = *retval;
PZVAL_LOCK(*retval);
return;
case IS_NULL:
result->var.ptr = &EG(uninitialized_zval);
PZVAL_LOCK(&EG(uninitialized_zval));
return;
case IS_STRING: {
zval tmp;
zval *ptr;
if (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'", dim->value.str.val);
}
break;
case IS_DOUBLE:
case IS_NULL:
case IS_BOOL:
if (type != BP_VAR_IS) {
zend_error(E_NOTICE, "String offset cast occurred");
}
break;
default:
zend_error(E_WARNING, "Illegal offset type");
break;
}
ZVAL_COPY_VALUE(&tmp, dim);
zval_copy_ctor(&tmp);
convert_to_long(&tmp);
dim = &tmp;
}
ALLOC_ZVAL(ptr);
INIT_PZVAL(ptr);
Z_TYPE_P(ptr) = IS_STRING;
if (Z_LVAL_P(dim) < 0 || Z_STRLEN_P(container) <= Z_LVAL_P(dim)) {
if (type != BP_VAR_IS) {
zend_error(E_NOTICE, "Uninitialized string offset: %ld", Z_LVAL_P(dim));
}
Z_STRVAL_P(ptr) = STR_EMPTY_ALLOC();
Z_STRLEN_P(ptr) = 0;
} else {
Z_STRVAL_P(ptr) = (char*)emalloc(2);
Z_STRVAL_P(ptr)[0] = Z_STRVAL_P(container)[Z_LVAL_P(dim)];
Z_STRVAL_P(ptr)[1] = 0;
Z_STRLEN_P(ptr) = 1;
}
result->var.ptr = ptr;
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_type == 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 (result) {
if (overloaded_result) {
result->var.ptr = overloaded_result;
PZVAL_LOCK(overloaded_result);
} else {
result->var.ptr = &EG(uninitialized_zval);
PZVAL_LOCK(&EG(uninitialized_zval));
}
}
if (dim_type == IS_TMP_VAR) {
zval_ptr_dtor(&dim);
}
}
return;
default:
result->var.ptr = &EG(uninitialized_zval);
PZVAL_LOCK(&EG(uninitialized_zval));
return;
}
}
static void zend_fetch_property_address(temp_variable *result, zval **container_ptr, zval *prop_ptr, const zend_literal *key, int type TSRMLS_DC)
{
zval *container = *container_ptr;;
if (Z_TYPE_P(container) != IS_OBJECT) {
if (container == &EG(error_zval)) {
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(EG(error_zval_ptr));
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_BOOL && Z_LVAL_P(container)==0) ||
(Z_TYPE_P(container) == IS_STRING && Z_STRLEN_P(container)==0)))) {
if (!PZVAL_IS_REF(container)) {
SEPARATE_ZVAL(container_ptr);
container = *container_ptr;
}
object_init(container);
} else {
zend_error(E_WARNING, "Attempt to modify property of non-object");
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(EG(error_zval_ptr));
return;
}
}
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, type, key 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, type, key TSRMLS_CC)) != NULL) {
AI_SET_PTR(result, ptr);
PZVAL_LOCK(ptr);
} else {
zend_error_noreturn(E_ERROR, "Cannot access undefined property for object with overloaded property access");
}
} else {
result->var.ptr_ptr = ptr_ptr;
PZVAL_LOCK(*ptr_ptr);
}
} else if (Z_OBJ_HT_P(container)->read_property) {
zval *ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, type, key TSRMLS_CC);
AI_SET_PTR(result, ptr);
PZVAL_LOCK(ptr);
} else {
zend_error(E_WARNING, "This object doesn't support property references");
result->var.ptr_ptr = &EG(error_zval_ptr);
PZVAL_LOCK(EG(error_zval_ptr));
}
}
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_T(brk_opline->op1.var).var.ptr);
}
break;
case ZEND_FREE:
if (!(brk_opline->extended_value & EXT_TYPE_FREE_ON_RETURN)) {
zendi_zval_dtor(EX_T(brk_opline->op1.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);
/* See http://support.microsoft.com/kb/190351 */
#ifdef PHP_WIN32
fflush(stderr);
#endif
} 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, zend_fcall_info *fci, int return_value_used TSRMLS_DC)
{
if (fci != NULL) {
execute_data_ptr->function_state.function->internal_function.handler(
fci->param_count, *fci->retval_ptr_ptr, fci->retval_ptr_ptr,
fci->object_ptr, 1 TSRMLS_CC
);
} else {
zval **return_value_ptr = &EX_TMP_VAR(execute_data_ptr, execute_data_ptr->opline->result.var)->var.ptr;
execute_data_ptr->function_state.function->internal_function.handler(
execute_data_ptr->opline->extended_value, *return_value_ptr, return_value_ptr,
execute_data_ptr->object, return_value_used TSRMLS_CC
);
}
}
void zend_clean_and_cache_symbol_table(HashTable *symbol_table TSRMLS_DC) /* {{{ */
{
if (EG(symtable_cache_ptr) >= EG(symtable_cache_limit)) {
zend_hash_destroy(symbol_table);
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);
*(++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_CV_NUM(execute_data, 0);
zval ***end = cv + EX(op_array)->last_var;
while (cv != end) {
if (*cv) {
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 |<-+ |
* +========================================+ |
* |
* +========================================+ |
* | TMP_VAR[op_arrat->T-1] | |
* | ... | |
* EX_TMP_VAR_NUM(0) ----> | TMP_VAR[0] | |
* +----------------------------------------+ |
* EG(current_execute_data) -> | zend_execute_data | |
* | EX(prev_execute_data) |----+
* +----------------------------------------+
* EX_CV_NUM(0) ---------> | CV[0] |--+
* | ... | |
* | CV[op_array->last_var-1] | |
* +----------------------------------------+ |
* | Optional slot for CV[0] zval* |<-+
* | ... |
* | ...for CV [op_array->last_var-1] zval* |
* +----------------------------------------+
* 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, zend_bool nested 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 CVs_size = ZEND_MM_ALIGNED_SIZE(sizeof(zval **) * op_array->last_var * (EG(active_symbol_table) ? 1 : 2));
size_t Ts_size = ZEND_MM_ALIGNED_SIZE(sizeof(temp_variable)) * 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 + Ts_size + CVs_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(void*) - 1)) / sizeof(void*));
EG(argument_stack)->prev = NULL;
execute_data = (zend_execute_data*)((char*)ZEND_VM_STACK_ELEMETS(EG(argument_stack)) + args_size + execute_data_size + Ts_size);
/* copy prev_execute_data */
EX(prev_execute_data) = (zend_execute_data*)((char*)ZEND_VM_STACK_ELEMETS(EG(argument_stack)) + args_size);
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 = (void**)((char*)ZEND_VM_STACK_ELEMETS(EG(argument_stack)) + ZEND_MM_ALIGNED_SIZE(sizeof(zval*)) * args_count);
/* copy arguments */
*EX(prev_execute_data)->function_state.arguments = (void*)(zend_uintptr_t)args_count;
if (args_count > 0) {
zval **arg_src = (zval**)zend_vm_stack_get_arg_ex(EG(current_execute_data), 1);
zval **arg_dst = (zval**)zend_vm_stack_get_arg_ex(EX(prev_execute_data), 1);
int i;
for (i = 0; i < args_count; i++) {
arg_dst[i] = arg_src[i];
Z_ADDREF_P(arg_dst[i]);
}
}
} else {
execute_data = zend_vm_stack_alloc(total_size TSRMLS_CC);
execute_data = (zend_execute_data*)((char*)execute_data + Ts_size);
EX(prev_execute_data) = EG(current_execute_data);
}
memset(EX_CV_NUM(execute_data, 0), 0, sizeof(zval **) * op_array->last_var);
EX(call_slots) = (call_slot*)((char *)execute_data + execute_data_size + CVs_size);
EX(op_array) = op_array;
EG(argument_stack)->top = zend_vm_stack_frame_base(execute_data);
EX(object) = NULL;
EX(current_this) = NULL;
EX(old_error_reporting) = NULL;
EX(symbol_table) = EG(active_symbol_table);
EX(call) = NULL;
EG(current_execute_data) = execute_data;
EX(nested) = nested;
EX(delayed_exception) = NULL;
if (!op_array->run_time_cache && op_array->last_cache_slot) {
op_array->run_time_cache = ecalloc(op_array->last_cache_slot, sizeof(void*));
}
if (op_array->this_var != -1 && EG(This)) {
Z_ADDREF_P(EG(This)); /* For $this pointer */
if (!EG(active_symbol_table)) {
EX_CV(op_array->this_var) = (zval **) EX_CV_NUM(execute_data, op_array->last_var + op_array->this_var);
*EX_CV(op_array->this_var) = EG(This);
} else {
if (zend_hash_add(EG(active_symbol_table), "this", sizeof("this"), &EG(This), sizeof(zval *), (void **) EX_CV_NUM(execute_data, op_array->this_var))==FAILURE) {
Z_DELREF_P(EG(This));
}
}
}
EX(opline) = UNEXPECTED((op_array->fn_flags & ZEND_ACC_INTERACTIVE) != 0) && EG(start_op) ? EG(start_op) : op_array->opcodes;
EG(opline_ptr) = &EX(opline);
EX(function_state).function = (zend_function *) op_array;
EX(function_state).arguments = NULL;
return execute_data;
}
/* }}} */
ZEND_API zend_execute_data *zend_create_execute_data_from_op_array(zend_op_array *op_array, zend_bool nested TSRMLS_DC) /* {{{ */
{
return i_create_execute_data_from_op_array(op_array, nested 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) + call->num_additional_args;
return ARG_SHOULD_BE_SENT_BY_REF(call->fbc, arg_num);
}
/* }}} */
static void **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;
*(EG(argument_stack)->top) = (void*)(zend_uintptr_t)count;
while (count-- > 0) {
void *data = *(--p->top);
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);
}
*(ZEND_VM_STACK_ELEMETS(EG(argument_stack)) + count) = data;
}
return EG(argument_stack)->top++;
}
/* }}} */
static zend_always_inline void** 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);
}
*(EG(argument_stack)->top) = (void*)(zend_uintptr_t)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_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);
}
ZEND_API zval **zend_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) {
return get_zval_ptr_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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