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php-src/Zend/zend_execute.h

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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> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifndef ZEND_EXECUTE_H
#define ZEND_EXECUTE_H
#include "zend_compile.h"
#include "zend_hash.h"
#include "zend_operators.h"
#include "zend_variables.h"
BEGIN_EXTERN_C()
struct _zend_fcall_info;
ZEND_API extern void (*zend_execute_ex)(zend_execute_data *execute_data TSRMLS_DC);
ZEND_API extern void (*zend_execute_internal)(zend_execute_data *execute_data_ptr, struct _zend_fcall_info *fci TSRMLS_DC);
void init_executor(TSRMLS_D);
void shutdown_executor(TSRMLS_D);
void shutdown_destructors(TSRMLS_D);
ZEND_API zend_execute_data *zend_create_execute_data(zend_op_array *op_array, zval *return_value, vm_frame_kind frame_kind TSRMLS_DC);
ZEND_API zend_execute_data *zend_create_generator_execute_data(zend_op_array *op_array, zval *return_value TSRMLS_DC);
ZEND_API void zend_execute(zend_op_array *op_array, zval *return_value TSRMLS_DC);
ZEND_API void execute_ex(zend_execute_data *execute_data TSRMLS_DC);
ZEND_API void execute_internal(zend_execute_data *execute_data_ptr, struct _zend_fcall_info *fci TSRMLS_DC);
ZEND_API int zend_is_true(zval *op TSRMLS_DC);
ZEND_API zend_class_entry *zend_lookup_class(zend_string *name TSRMLS_DC);
ZEND_API zend_class_entry *zend_lookup_class_ex(zend_string *name, const zval *key, int use_autoload TSRMLS_DC);
ZEND_API int zend_eval_string(char *str, zval *retval_ptr, char *string_name TSRMLS_DC);
ZEND_API int zend_eval_stringl(char *str, int str_len, zval *retval_ptr, char *string_name TSRMLS_DC);
ZEND_API int zend_eval_string_ex(char *str, zval *retval_ptr, char *string_name, int handle_exceptions TSRMLS_DC);
ZEND_API int zend_eval_stringl_ex(char *str, int str_len, zval *retval_ptr, char *string_name, int handle_exceptions TSRMLS_DC);
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_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, zval *arg TSRMLS_DC);
static zend_always_inline void i_zval_ptr_dtor(zval *zval_ptr ZEND_FILE_LINE_DC TSRMLS_DC)
{
if (Z_REFCOUNTED_P(zval_ptr)) {
if (!Z_DELREF_P(zval_ptr)) {
ZEND_ASSERT(zval_ptr != &EG(uninitialized_zval));
_zval_dtor_func_for_ptr(Z_COUNTED_P(zval_ptr) ZEND_FILE_LINE_CC);
} else {
GC_ZVAL_CHECK_POSSIBLE_ROOT(zval_ptr);
}
}
}
static zend_always_inline void i_zval_ptr_dtor_nogc(zval *zval_ptr ZEND_FILE_LINE_DC TSRMLS_DC)
{
if (Z_REFCOUNTED_P(zval_ptr)) {
if (!Z_DELREF_P(zval_ptr)) {
ZEND_ASSERT(zval_ptr != &EG(uninitialized_zval));
_zval_dtor_func_for_ptr(Z_COUNTED_P(zval_ptr) ZEND_FILE_LINE_CC);
}
}
}
static zend_always_inline int i_zend_is_true(zval *op TSRMLS_DC)
{
int result;
again:
switch (Z_TYPE_P(op)) {
case IS_UNDEF:
case IS_NULL:
case IS_FALSE:
result = 0;
break;
case IS_TRUE:
result = 1;
break;
case IS_LONG:
result = (Z_LVAL_P(op)?1:0);
break;
case IS_RESOURCE:
result = (Z_RES_HANDLE_P(op)?1:0);
break;
case IS_DOUBLE:
result = (Z_DVAL_P(op) ? 1 : 0);
break;
case IS_STRING:
if (Z_STRLEN_P(op) == 0
|| (Z_STRLEN_P(op)==1 && Z_STRVAL_P(op)[0]=='0')) {
result = 0;
} else {
result = 1;
}
break;
case IS_ARRAY:
result = (zend_hash_num_elements(Z_ARRVAL_P(op))?1:0);
break;
case IS_OBJECT:
if (IS_ZEND_STD_OBJECT(*op)) {
if (Z_OBJ_HT_P(op)->cast_object) {
zval tmp;
if (Z_OBJ_HT_P(op)->cast_object(op, &tmp, _IS_BOOL TSRMLS_CC) == SUCCESS) {
result = Z_TYPE(tmp) == IS_TRUE;
break;
}
// TODO: do we really need this warning ???
// Nikita, add your comments here.
zend_error(E_RECOVERABLE_ERROR, "Object of class %s could not be converted to boolean", Z_OBJ_P(op)->ce->name->val);
} else if (Z_OBJ_HT_P(op)->get) {
zval rv;
zval *tmp = Z_OBJ_HT_P(op)->get(op, &rv TSRMLS_CC);
if (Z_TYPE_P(tmp) != IS_OBJECT) {
/* for safety - avoid loop */
convert_to_boolean(tmp);
result = Z_TYPE_P(tmp) == IS_TRUE;
zval_ptr_dtor(tmp);
break;
}
}
}
result = 1;
break;
case IS_REFERENCE:
op = Z_REFVAL_P(op);
goto again;
break;
default:
result = 0;
break;
}
return result;
}
ZEND_API int zval_update_constant(zval *pp, zend_bool inline_change TSRMLS_DC);
ZEND_API int zval_update_constant_inline_change(zval *pp, zend_class_entry *scope TSRMLS_DC);
ZEND_API int zval_update_constant_no_inline_change(zval *pp, zend_class_entry *scope TSRMLS_DC);
ZEND_API int zval_update_constant_ex(zval *pp, zend_bool inline_change, zend_class_entry *scope TSRMLS_DC);
/* dedicated Zend executor functions - do not use! */
#define ZEND_VM_STACK_PAGE_SIZE (16 * 1024) /* should be a power of 2 */
struct _zend_vm_stack {
zval *top;
zval *end;
zend_vm_stack prev;
};
#define ZEND_VM_STACK_HEADER_SLOT \
((ZEND_MM_ALIGNED_SIZE(sizeof(struct _zend_vm_stack)) + ZEND_MM_ALIGNED_SIZE(sizeof(zval)) - 1) / ZEND_MM_ALIGNED_SIZE(sizeof(zval)))
#define ZEND_VM_STACK_ELEMETS(stack) \
(((zval*)(stack)) + ZEND_VM_STACK_HEADER_SLOT)
#define ZEND_VM_STACK_GROW_IF_NEEDED(count) \
do { \
if (UNEXPECTED((count) > \
EG(argument_stack)->end - EG(argument_stack)->top)) { \
zend_vm_stack_extend((count) TSRMLS_CC); \
} \
} while (0)
static zend_always_inline zend_vm_stack zend_vm_stack_new_page(int count) {
zend_vm_stack page = (zend_vm_stack)emalloc(count * ZEND_MM_ALIGNED_SIZE(sizeof(zval)));
page->top = ZEND_VM_STACK_ELEMETS(page);
page->end = (zval*)page + count;
page->prev = NULL;
return page;
}
static zend_always_inline void zend_vm_stack_init(TSRMLS_D)
{
EG(argument_stack) = zend_vm_stack_new_page(ZEND_VM_STACK_PAGE_SIZE);
EG(argument_stack)->top++;
}
static zend_always_inline void zend_vm_stack_destroy(TSRMLS_D)
{
zend_vm_stack stack = EG(argument_stack);
while (stack != NULL) {
zend_vm_stack p = stack->prev;
efree(stack);
stack = p;
}
}
static zend_always_inline void zend_vm_stack_extend(int count TSRMLS_DC)
{
zend_vm_stack p = zend_vm_stack_new_page(
(count >= ZEND_VM_STACK_PAGE_SIZE - ZEND_VM_STACK_HEADER_SLOT) ?
((count + ZEND_VM_STACK_HEADER_SLOT + ZEND_VM_STACK_PAGE_SIZE - 1) & ~(ZEND_VM_STACK_PAGE_SIZE-1)) :
ZEND_VM_STACK_PAGE_SIZE);
p->prev = EG(argument_stack);
EG(argument_stack) = p;
}
static zend_always_inline zend_execute_data *zend_vm_stack_push_call_frame(zend_function *func, zend_uint num_args, zend_uint flags, zend_class_entry *called_scope, zend_object *object, zend_execute_data *prev TSRMLS_DC)
{
int used_stack = ZEND_CALL_FRAME_SLOT + num_args;
zend_execute_data *call;
if (ZEND_USER_CODE(func->type)) {
used_stack += func->op_array.last_var + func->op_array.T - MIN(func->op_array.num_args, num_args);
}
ZEND_VM_STACK_GROW_IF_NEEDED(used_stack);
call = (zend_execute_data*)EG(argument_stack)->top;
call->func = func;
call->num_args = 0; //??? num_args;
call->flags = flags;
call->called_scope = called_scope;
call->object = object;
call->prev_nested_call = prev;
EG(argument_stack)->top += used_stack;
return call;
}
static zend_always_inline void zend_vm_stack_free_extra_args(zend_execute_data *call TSRMLS_DC)
{
if (UNEXPECTED(call->num_args > call->func->op_array.num_args)) {
zval *end = EX_VAR_NUM_2(call, call->func->op_array.last_var + call->func->op_array.T);
zval *p = end + (call->num_args - call->func->op_array.num_args);
do {
p--;
i_zval_ptr_dtor_nogc(p ZEND_FILE_LINE_CC TSRMLS_CC);
} while (p != end);
}
}
static zend_always_inline void zend_vm_stack_free_args(zend_execute_data *call TSRMLS_DC)
{
zend_uint num_args = call->num_args;
if (num_args > 0) {
zval *p = ZEND_CALL_ARG(call, num_args + 1);
zval *end = p - num_args;;
do {
p--;
i_zval_ptr_dtor_nogc(p ZEND_FILE_LINE_CC TSRMLS_CC);
} while (p != end);
}
}
static zend_always_inline void zend_vm_stack_free_call_frame(zend_execute_data *call TSRMLS_DC)
{
if (UNEXPECTED(ZEND_VM_STACK_ELEMETS(EG(argument_stack)) == (zval*)call)) {
zend_vm_stack p = EG(argument_stack);
EG(argument_stack) = p->prev;
efree(p);
} else {
EG(argument_stack)->top = (zval*)call;
}
}
static zend_always_inline int zend_vm_stack_get_args_count_ex(zend_execute_data *ex)
{
return ex->call->num_args;
}
static zend_always_inline zval* zend_vm_stack_get_arg_ex(zend_execute_data *ex, int requested_arg)
{
int arg_count = ex->call->num_args;
if (UNEXPECTED(requested_arg > arg_count)) {
return NULL;
}
return ZEND_CALL_ARG(ex->call, requested_arg);
}
static zend_always_inline int zend_vm_stack_get_args_count(TSRMLS_D)
{
if (EG(current_execute_data)->prev_execute_data) {
return zend_vm_stack_get_args_count_ex(EG(current_execute_data)->prev_execute_data);
} else {
return 0;
}
}
static zend_always_inline zval* zend_vm_stack_get_arg(int requested_arg TSRMLS_DC)
{
return zend_vm_stack_get_arg_ex(EG(current_execute_data)->prev_execute_data, requested_arg);
}
void execute_new_code(TSRMLS_D);
/* services */
ZEND_API const char *get_active_class_name(const char **space TSRMLS_DC);
ZEND_API const char *get_active_function_name(TSRMLS_D);
ZEND_API const char *zend_get_executed_filename(TSRMLS_D);
ZEND_API uint zend_get_executed_lineno(TSRMLS_D);
ZEND_API zend_bool zend_is_executing(TSRMLS_D);
ZEND_API void zend_set_timeout(long seconds, int reset_signals);
ZEND_API void zend_unset_timeout(TSRMLS_D);
ZEND_API void zend_timeout(int dummy);
ZEND_API zend_class_entry *zend_fetch_class(zend_string *class_name, int fetch_type TSRMLS_DC);
ZEND_API zend_class_entry *zend_fetch_class_by_name(zend_string *class_name, const zval *key, int fetch_type TSRMLS_DC);
void zend_verify_abstract_class(zend_class_entry *ce TSRMLS_DC);
#ifdef ZEND_WIN32
void zend_init_timeout_thread(void);
void zend_shutdown_timeout_thread(void);
#define WM_REGISTER_ZEND_TIMEOUT (WM_USER+1)
#define WM_UNREGISTER_ZEND_TIMEOUT (WM_USER+2)
#endif
#define active_opline (*EG(opline_ptr))
/* The following tries to resolve the classname of a zval of type object.
* Since it is slow it should be only used in error messages.
*/
#define Z_OBJ_CLASS_NAME_P(obj) (((obj) && (obj)->handlers->get_class_entry != NULL && (obj)->handlers->get_class_entry) ? (obj)->handlers->get_class_entry(obj TSRMLS_CC)->name->val : "")
ZEND_API zval* zend_get_compiled_variable_value(const zend_execute_data *execute_data_ptr, zend_uint var);
#define ZEND_USER_OPCODE_CONTINUE 0 /* execute next opcode */
#define ZEND_USER_OPCODE_RETURN 1 /* exit from executor (return from function) */
#define ZEND_USER_OPCODE_DISPATCH 2 /* call original opcode handler */
#define ZEND_USER_OPCODE_ENTER 3 /* enter into new op_array without recursion */
#define ZEND_USER_OPCODE_LEAVE 4 /* return to calling op_array within the same executor */
#define ZEND_USER_OPCODE_DISPATCH_TO 0x100 /* call original handler of returned opcode */
ZEND_API int zend_set_user_opcode_handler(zend_uchar opcode, user_opcode_handler_t handler);
ZEND_API user_opcode_handler_t zend_get_user_opcode_handler(zend_uchar opcode);
/* former zend_execute_locks.h */
typedef struct _zend_free_op {
zval *var;
/* int is_var; */
} zend_free_op;
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);
ZEND_API int zend_do_fcall(ZEND_OPCODE_HANDLER_ARGS);
void zend_clean_and_cache_symbol_table(zend_array *symbol_table TSRMLS_DC);
void zend_free_compiled_variables(zend_execute_data *execute_data TSRMLS_DC);
#define CACHED_PTR(num) \
EX(run_time_cache)[(num)]
#define CACHE_PTR(num, ptr) do { \
EX(run_time_cache)[(num)] = (ptr); \
} while (0)
#define CACHED_POLYMORPHIC_PTR(num, ce) \
((EX(run_time_cache)[(num)] == (ce)) ? \
EX(run_time_cache)[(num) + 1] : \
NULL)
#define CACHE_POLYMORPHIC_PTR(num, ce, ptr) do { \
EX(run_time_cache)[(num)] = (ce); \
EX(run_time_cache)[(num) + 1] = (ptr); \
} while (0)
#define CACHED_PTR_EX(op_array, num) \
(op_array)->run_time_cache[(num)]
#define CACHE_PTR_EX(op_array, num, ptr) do { \
(op_array)->run_time_cache[(num)] = (ptr); \
} while (0)
#define CACHED_POLYMORPHIC_PTR_EX(op_array, num, ce) \
(((op_array)->run_time_cache[(num)] == (ce)) ? \
(op_array)->run_time_cache[(num) + 1] : \
NULL)
#define CACHE_POLYMORPHIC_PTR_EX(op_array, num, ce, ptr) do { \
(op_array)->run_time_cache[(num)] = (ce); \
(op_array)->run_time_cache[(num) + 1] = (ptr); \
} while (0)
END_EXTERN_C()
#endif /* ZEND_EXECUTE_H */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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