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zend_execute_API.c
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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 |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <[email protected]> |
| Zeev Suraski <[email protected]> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include <stdio.h>
#include <signal.h>
#include "zend.h"
#include "zend_compile.h"
#include "zend_execute.h"
#include "zend_API.h"
#include "zend_stack.h"
#include "zend_constants.h"
#include "zend_extensions.h"
#include "zend_exceptions.h"
#include "zend_closures.h"
#include "zend_generators.h"
#include "zend_vm.h"
#include "zend_float.h"
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
ZEND_API void (*zend_execute_ex)(zend_execute_data *execute_data);
ZEND_API void (*zend_execute_internal)(zend_execute_data *execute_data, zval *return_value);
/* true globals */
ZEND_API const zend_fcall_info empty_fcall_info = { 0, NULL, {{0}, {{0}}, {0}}, NULL, NULL, NULL, NULL, 0, 0 };
ZEND_API const zend_fcall_info_cache empty_fcall_info_cache = { 0, NULL, NULL, NULL, NULL };
#ifdef ZEND_WIN32
#ifdef ZTS
__declspec(thread)
#endif
HANDLE tq_timer = NULL;
#endif
#if 0&&ZEND_DEBUG
static void (*original_sigsegv_handler)(int);
static void zend_handle_sigsegv(int dummy) /* {{{ */
{
fflush(stdout);
fflush(stderr);
if (original_sigsegv_handler == zend_handle_sigsegv) {
signal(SIGSEGV, original_sigsegv_handler);
} else {
signal(SIGSEGV, SIG_DFL);
}
{
fprintf(stderr, "SIGSEGV caught on opcode %d on opline %d of %s() at %s:%d\n\n",
active_opline->opcode,
active_opline-EG(active_op_array)->opcodes,
get_active_function_name(),
zend_get_executed_filename(),
zend_get_executed_lineno());
/* See http://support.microsoft.com/kb/190351 */
#ifdef PHP_WIN32
fflush(stderr);
#endif
}
if (original_sigsegv_handler!=zend_handle_sigsegv) {
original_sigsegv_handler(dummy);
}
}
/* }}} */
#endif
static void zend_extension_activator(zend_extension *extension) /* {{{ */
{
if (extension->activate) {
extension->activate();
}
}
/* }}} */
static void zend_extension_deactivator(zend_extension *extension) /* {{{ */
{
if (extension->deactivate) {
extension->deactivate();
}
}
/* }}} */
static int clean_non_persistent_function(zval *zv) /* {{{ */
{
zend_function *function = Z_PTR_P(zv);
return (function->type == ZEND_INTERNAL_FUNCTION) ? ZEND_HASH_APPLY_STOP : ZEND_HASH_APPLY_REMOVE;
}
/* }}} */
ZEND_API int clean_non_persistent_function_full(zval *zv) /* {{{ */
{
zend_function *function = Z_PTR_P(zv);
return (function->type == ZEND_INTERNAL_FUNCTION) ? ZEND_HASH_APPLY_KEEP : ZEND_HASH_APPLY_REMOVE;
}
/* }}} */
static int clean_non_persistent_class(zval *zv) /* {{{ */
{
zend_class_entry *ce = Z_PTR_P(zv);
return (ce->type == ZEND_INTERNAL_CLASS) ? ZEND_HASH_APPLY_STOP : ZEND_HASH_APPLY_REMOVE;
}
/* }}} */
ZEND_API int clean_non_persistent_class_full(zval *zv) /* {{{ */
{
zend_class_entry *ce = Z_PTR_P(zv);
return (ce->type == ZEND_INTERNAL_CLASS) ? ZEND_HASH_APPLY_KEEP : ZEND_HASH_APPLY_REMOVE;
}
/* }}} */
void init_executor(void) /* {{{ */
{
zend_init_fpu();
ZVAL_NULL(&EG(uninitialized_zval));
/* trick to make uninitialized_zval never be modified, passed by ref, etc. */
ZVAL_NULL(&EG(error_zval));
/* destroys stack frame, therefore makes core dumps worthless */
#if 0&&ZEND_DEBUG
original_sigsegv_handler = signal(SIGSEGV, zend_handle_sigsegv);
#endif
EG(symtable_cache_ptr) = EG(symtable_cache) - 1;
EG(symtable_cache_limit) = EG(symtable_cache) + SYMTABLE_CACHE_SIZE - 1;
EG(no_extensions) = 0;
EG(function_table) = CG(function_table);
EG(class_table) = CG(class_table);
EG(in_autoload) = NULL;
EG(autoload_func) = NULL;
EG(error_handling) = EH_NORMAL;
zend_vm_stack_init();
zend_hash_init(&EG(symbol_table).ht, 64, NULL, ZVAL_PTR_DTOR, 0);
GC_REFCOUNT(&EG(symbol_table)) = 1;
GC_TYPE_INFO(&EG(symbol_table)) = IS_ARRAY;
EG(valid_symbol_table) = 1;
zend_llist_apply(&zend_extensions, (llist_apply_func_t) zend_extension_activator);
zend_hash_init(&EG(included_files), 8, NULL, NULL, 0);
EG(ticks_count) = 0;
ZVAL_UNDEF(&EG(user_error_handler));
EG(current_execute_data) = NULL;
zend_stack_init(&EG(user_error_handlers_error_reporting), sizeof(int));
zend_stack_init(&EG(user_error_handlers), sizeof(zval));
zend_stack_init(&EG(user_exception_handlers), sizeof(zval));
zend_objects_store_init(&EG(objects_store), 1024);
EG(full_tables_cleanup) = 0;
#ifdef ZEND_WIN32
EG(timed_out) = 0;
#endif
EG(exception) = NULL;
EG(prev_exception) = NULL;
EG(scope) = NULL;
EG(active) = 1;
}
/* }}} */
static int zval_call_destructor(zval *zv) /* {{{ */
{
if (Z_TYPE_P(zv) == IS_INDIRECT) {
zv = Z_INDIRECT_P(zv);
}
if (Z_TYPE_P(zv) == IS_OBJECT && Z_REFCOUNT_P(zv) == 1) {
return ZEND_HASH_APPLY_REMOVE;
} else {
return ZEND_HASH_APPLY_KEEP;
}
}
/* }}} */
static void zend_unclean_zval_ptr_dtor(zval *zv) /* {{{ */
{
if (Z_TYPE_P(zv) == IS_INDIRECT) {
zv = Z_INDIRECT_P(zv);
}
i_zval_ptr_dtor(zv ZEND_FILE_LINE_CC);
}
/* }}} */
void shutdown_destructors(void) /* {{{ */
{
if (CG(unclean_shutdown)) {
EG(symbol_table).ht.pDestructor = zend_unclean_zval_ptr_dtor;
}
zend_try {
uint32_t symbols;
do {
symbols = zend_hash_num_elements(&EG(symbol_table).ht);
zend_hash_reverse_apply(&EG(symbol_table).ht, (apply_func_t) zval_call_destructor);
} while (symbols != zend_hash_num_elements(&EG(symbol_table).ht));
zend_objects_store_call_destructors(&EG(objects_store));
} zend_catch {
/* if we couldn't destruct cleanly, mark all objects as destructed anyway */
zend_objects_store_mark_destructed(&EG(objects_store));
} zend_end_try();
}
/* }}} */
void shutdown_executor(void) /* {{{ */
{
zend_function *func;
zend_class_entry *ce;
zend_try {
/* Removed because this can not be safely done, e.g. in this situation:
Object 1 creates object 2
Object 3 holds reference to object 2.
Now when 1 and 2 are destroyed, 3 can still access 2 in its destructor, with
very problematic results */
/* zend_objects_store_call_destructors(&EG(objects_store)); */
/* Moved after symbol table cleaners, because some of the cleaners can call
destructors, which would use EG(symtable_cache_ptr) and thus leave leaks */
/* while (EG(symtable_cache_ptr)>=EG(symtable_cache)) {
zend_hash_destroy(*EG(symtable_cache_ptr));
efree(*EG(symtable_cache_ptr));
EG(symtable_cache_ptr)--;
}
*/
zend_llist_apply(&zend_extensions, (llist_apply_func_t) zend_extension_deactivator);
if (CG(unclean_shutdown)) {
EG(symbol_table).ht.pDestructor = zend_unclean_zval_ptr_dtor;
}
zend_hash_graceful_reverse_destroy(&EG(symbol_table).ht);
} zend_end_try();
EG(valid_symbol_table) = 0;
zend_try {
zval *zeh;
/* remove error handlers before destroying classes and functions,
* so that if handler used some class, crash would not happen */
if (Z_TYPE(EG(user_error_handler)) != IS_UNDEF) {
zeh = &EG(user_error_handler);
zval_ptr_dtor(zeh);
ZVAL_UNDEF(&EG(user_error_handler));
}
if (Z_TYPE(EG(user_exception_handler)) != IS_UNDEF) {
zeh = &EG(user_exception_handler);
zval_ptr_dtor(zeh);
ZVAL_UNDEF(&EG(user_exception_handler));
}
zend_stack_clean(&EG(user_error_handlers_error_reporting), NULL, 1);
zend_stack_clean(&EG(user_error_handlers), (void (*)(void *))ZVAL_DESTRUCTOR, 1);
zend_stack_clean(&EG(user_exception_handlers), (void (*)(void *))ZVAL_DESTRUCTOR, 1);
} zend_end_try();
zend_try {
/* Cleanup static data for functions and arrays.
* We need a separate cleanup stage because of the following problem:
* Suppose we destroy class X, which destroys the class's function table,
* and in the function table we have function foo() that has static $bar.
* Now if an object of class X is assigned to $bar, its destructor will be
* called and will fail since X's function table is in mid-destruction.
* So we want first of all to clean up all data and then move to tables destruction.
* Note that only run-time accessed data need to be cleaned up, pre-defined data can
* not contain objects and thus are not probelmatic */
if (EG(full_tables_cleanup)) {
ZEND_HASH_FOREACH_PTR(EG(function_table), func) {
if (func->type == ZEND_USER_FUNCTION) {
zend_cleanup_op_array_data((zend_op_array *) func);
}
} ZEND_HASH_FOREACH_END();
ZEND_HASH_REVERSE_FOREACH_PTR(EG(class_table), ce) {
if (ce->type == ZEND_USER_CLASS) {
zend_cleanup_user_class_data(ce);
} else {
zend_cleanup_internal_class_data(ce);
}
} ZEND_HASH_FOREACH_END();
} else {
ZEND_HASH_REVERSE_FOREACH_PTR(EG(function_table), func) {
if (func->type != ZEND_USER_FUNCTION) {
break;
}
zend_cleanup_op_array_data((zend_op_array *) func);
} ZEND_HASH_FOREACH_END();
ZEND_HASH_REVERSE_FOREACH_PTR(EG(class_table), ce) {
if (ce->type != ZEND_USER_CLASS) {
break;
}
zend_cleanup_user_class_data(ce);
} ZEND_HASH_FOREACH_END();
zend_cleanup_internal_classes();
}
} zend_end_try();
zend_try {
zend_llist_destroy(&CG(open_files));
} zend_end_try();
zend_try {
zend_close_rsrc_list(&EG(regular_list));
} zend_end_try();
zend_try {
zend_objects_store_free_object_storage(&EG(objects_store));
zend_vm_stack_destroy();
/* Destroy all op arrays */
if (EG(full_tables_cleanup)) {
zend_hash_reverse_apply(EG(function_table), clean_non_persistent_function_full);
zend_hash_reverse_apply(EG(class_table), clean_non_persistent_class_full);
} else {
zend_hash_reverse_apply(EG(function_table), clean_non_persistent_function);
zend_hash_reverse_apply(EG(class_table), clean_non_persistent_class);
}
while (EG(symtable_cache_ptr)>=EG(symtable_cache)) {
zend_hash_destroy(&(*EG(symtable_cache_ptr))->ht);
FREE_HASHTABLE(*EG(symtable_cache_ptr));
EG(symtable_cache_ptr)--;
}
} zend_end_try();
zend_try {
clean_non_persistent_constants();
} zend_end_try();
zend_try {
#if 0&&ZEND_DEBUG
signal(SIGSEGV, original_sigsegv_handler);
#endif
zend_hash_destroy(&EG(included_files));
zend_stack_destroy(&EG(user_error_handlers_error_reporting));
zend_stack_destroy(&EG(user_error_handlers));
zend_stack_destroy(&EG(user_exception_handlers));
zend_objects_store_destroy(&EG(objects_store));
if (EG(in_autoload)) {
zend_hash_destroy(EG(in_autoload));
FREE_HASHTABLE(EG(in_autoload));
}
} zend_end_try();
zend_shutdown_fpu();
EG(active) = 0;
}
/* }}} */
/* return class name and "::" or "". */
ZEND_API const char *get_active_class_name(const char **space) /* {{{ */
{
zend_function *func;
if (!zend_is_executing()) {
if (space) {
*space = "";
}
return "";
}
func = EG(current_execute_data)->func;
switch (func->type) {
case ZEND_USER_FUNCTION:
case ZEND_INTERNAL_FUNCTION:
{
zend_class_entry *ce = func->common.scope;
if (space) {
*space = ce ? "::" : "";
}
return ce ? ce->name->val : "";
}
default:
if (space) {
*space = "";
}
return "";
}
}
/* }}} */
ZEND_API const char *get_active_function_name(void) /* {{{ */
{
zend_function *func;
if (!zend_is_executing()) {
return NULL;
}
func = EG(current_execute_data)->func;
switch (func->type) {
case ZEND_USER_FUNCTION: {
zend_string *function_name = func->common.function_name;
if (function_name) {
return function_name->val;
} else {
return "main";
}
}
break;
case ZEND_INTERNAL_FUNCTION:
return func->common.function_name->val;
break;
default:
return NULL;
}
}
/* }}} */
ZEND_API const char *zend_get_executed_filename(void) /* {{{ */
{
zend_execute_data *ex = EG(current_execute_data);
while (ex && (!ex->func || !ZEND_USER_CODE(ex->func->type))) {
ex = ex->prev_execute_data;
}
if (ex) {
return ex->func->op_array.filename->val;
} else {
return "[no active file]";
}
}
/* }}} */
ZEND_API uint zend_get_executed_lineno(void) /* {{{ */
{
zend_execute_data *ex = EG(current_execute_data);
while (ex && (!ex->func || !ZEND_USER_CODE(ex->func->type))) {
ex = ex->prev_execute_data;
}
if (ex) {
if (EG(exception) && ex->opline->opcode == ZEND_HANDLE_EXCEPTION &&
ex->opline->lineno == 0 && EG(opline_before_exception)) {
return EG(opline_before_exception)->lineno;
}
return ex->opline->lineno;
} else {
return 0;
}
}
/* }}} */
ZEND_API zend_bool zend_is_executing(void) /* {{{ */
{
return EG(current_execute_data) != 0;
}
/* }}} */
ZEND_API void _zval_ptr_dtor(zval *zval_ptr ZEND_FILE_LINE_DC) /* {{{ */
{
i_zval_ptr_dtor(zval_ptr ZEND_FILE_LINE_RELAY_CC);
}
/* }}} */
ZEND_API void _zval_internal_ptr_dtor(zval *zval_ptr ZEND_FILE_LINE_DC) /* {{{ */
{
if (Z_REFCOUNTED_P(zval_ptr)) {
Z_DELREF_P(zval_ptr);
if (Z_REFCOUNT_P(zval_ptr) == 0) {
_zval_internal_dtor_for_ptr(zval_ptr ZEND_FILE_LINE_CC);
}
}
}
/* }}} */
#define IS_VISITED_CONSTANT 0x80
#define IS_CONSTANT_VISITED(p) (Z_TYPE_P(p) & IS_VISITED_CONSTANT)
#define MARK_CONSTANT_VISITED(p) Z_TYPE_INFO_P(p) |= IS_VISITED_CONSTANT
ZEND_API int zval_update_constant_ex(zval *p, zend_bool inline_change, zend_class_entry *scope) /* {{{ */
{
zval *const_value;
char *colon;
if (IS_CONSTANT_VISITED(p)) {
zend_error(E_ERROR, "Cannot declare self-referencing constant '%s'", Z_STRVAL_P(p));
} else if (Z_TYPE_P(p) == IS_CONSTANT) {
int refcount;
SEPARATE_ZVAL_NOREF(p);
MARK_CONSTANT_VISITED(p);
refcount = Z_REFCOUNTED_P(p) ? Z_REFCOUNT_P(p) : 1;
const_value = zend_get_constant_ex(Z_STR_P(p), scope, Z_CONST_FLAGS_P(p));
if (!const_value) {
char *actual = Z_STRVAL_P(p);
if ((colon = (char*)zend_memrchr(Z_STRVAL_P(p), ':', Z_STRLEN_P(p)))) {
size_t len;
zend_error(E_ERROR, "Undefined class constant '%s'", Z_STRVAL_P(p));
len = Z_STRLEN_P(p) - ((colon - Z_STRVAL_P(p)) + 1);
if (inline_change) {
zend_string *tmp = zend_string_init(colon + 1, len, 0);
zend_string_release(Z_STR_P(p));
Z_STR_P(p) = tmp;
} else {
Z_STR_P(p) = zend_string_init(colon + 1, len, 0);
}
Z_TYPE_FLAGS_P(p) = IS_TYPE_REFCOUNTED | IS_TYPE_COPYABLE;
} else {
zend_string *save = Z_STR_P(p);
char *slash;
size_t actual_len = Z_STRLEN_P(p);
if ((Z_CONST_FLAGS_P(p) & IS_CONSTANT_UNQUALIFIED) && (slash = (char *)zend_memrchr(actual, '\\', actual_len))) {
actual = slash + 1;
actual_len -= (actual - Z_STRVAL_P(p));
if (inline_change) {
zend_string *s = zend_string_init(actual, actual_len, 0);
Z_STR_P(p) = s;
Z_TYPE_FLAGS_P(p) = IS_TYPE_REFCOUNTED | IS_TYPE_COPYABLE;
}
}
if (actual[0] == '\\') {
if (inline_change) {
memmove(Z_STRVAL_P(p), Z_STRVAL_P(p)+1, Z_STRLEN_P(p));
--Z_STRLEN_P(p);
} else {
++actual;
}
--actual_len;
}
if ((Z_CONST_FLAGS_P(p) & IS_CONSTANT_UNQUALIFIED) == 0) {
if (save->val[0] == '\\') {
zend_error(E_ERROR, "Undefined constant '%s'", save->val + 1);
} else {
zend_error(E_ERROR, "Undefined constant '%s'", save->val);
}
if (inline_change) {
zend_string_release(save);
}
save = NULL;
}
zend_error(E_NOTICE, "Use of undefined constant %s - assumed '%s'", actual, actual);
if (!inline_change) {
ZVAL_STRINGL(p, actual, actual_len);
} else {
Z_TYPE_INFO_P(p) = Z_REFCOUNTED_P(p) ?
IS_STRING_EX : IS_INTERNED_STRING_EX;
if (save && save->val != actual) {
zend_string_release(save);
}
}
}
} else {
if (inline_change) {
zend_string_release(Z_STR_P(p));
}
ZVAL_COPY_VALUE(p, const_value);
if (Z_OPT_CONSTANT_P(p)) {
zval_update_constant_ex(p, 1, NULL);
}
zval_opt_copy_ctor(p);
}
if (Z_REFCOUNTED_P(p)) Z_SET_REFCOUNT_P(p, refcount);
} else if (Z_TYPE_P(p) == IS_CONSTANT_AST) {
zval tmp;
SEPARATE_ZVAL_NOREF(p);
zend_ast_evaluate(&tmp, Z_ASTVAL_P(p), scope);
if (inline_change) {
zend_ast_destroy_and_free(Z_ASTVAL_P(p));
efree_size(Z_AST_P(p), sizeof(zend_ast_ref));
}
ZVAL_COPY_VALUE(p, &tmp);
}
return 0;
}
/* }}} */
ZEND_API int zval_update_constant_inline_change(zval *pp, zend_class_entry *scope) /* {{{ */
{
return zval_update_constant_ex(pp, 1, scope);
}
/* }}} */
ZEND_API int zval_update_constant_no_inline_change(zval *pp, zend_class_entry *scope) /* {{{ */
{
return zval_update_constant_ex(pp, 0, scope);
}
/* }}} */
ZEND_API int zval_update_constant(zval *pp, zend_bool inline_change) /* {{{ */
{
return zval_update_constant_ex(pp, inline_change, NULL);
}
/* }}} */
int call_user_function(HashTable *function_table, zval *object, zval *function_name, zval *retval_ptr, uint32_t param_count, zval params[]) /* {{{ */
{
return call_user_function_ex(function_table, object, function_name, retval_ptr, param_count, params, 1, NULL);
}
/* }}} */
int call_user_function_ex(HashTable *function_table, zval *object, zval *function_name, zval *retval_ptr, uint32_t param_count, zval params[], int no_separation, zend_array *symbol_table) /* {{{ */
{
zend_fcall_info fci;
fci.size = sizeof(fci);
fci.function_table = function_table;
fci.object = object ? Z_OBJ_P(object) : NULL;
ZVAL_COPY_VALUE(&fci.function_name, function_name);
fci.retval = retval_ptr;
fci.param_count = param_count;
fci.params = params;
fci.no_separation = (zend_bool) no_separation;
fci.symbol_table = symbol_table;
return zend_call_function(&fci, NULL);
}
/* }}} */
int zend_call_function(zend_fcall_info *fci, zend_fcall_info_cache *fci_cache) /* {{{ */
{
uint32_t i;
zend_class_entry *calling_scope = NULL;
zend_execute_data *call, dummy_execute_data;
zend_fcall_info_cache fci_cache_local;
zend_function *func;
zend_class_entry *orig_scope;
zval tmp;
ZVAL_UNDEF(fci->retval);
if (!EG(active)) {
return FAILURE; /* executor is already inactive */
}
if (EG(exception)) {
return FAILURE; /* we would result in an instable executor otherwise */
}
switch (fci->size) {
case sizeof(zend_fcall_info):
break; /* nothing to do currently */
default:
zend_error(E_ERROR, "Corrupted fcall_info provided to zend_call_function()");
break;
}
orig_scope = EG(scope);
/* Initialize execute_data */
if (!EG(current_execute_data)) {
/* This only happens when we're called outside any execute()'s
* It shouldn't be strictly necessary to NULL execute_data out,
* but it may make bugs easier to spot
*/
memset(&dummy_execute_data, 0, sizeof(zend_execute_data));
EG(current_execute_data) = &dummy_execute_data;
} else if (EG(current_execute_data)->func &&
ZEND_USER_CODE(EG(current_execute_data)->func->common.type) &&
EG(current_execute_data)->opline->opcode != ZEND_DO_FCALL) {
/* Insert fake frame in case of include or magic calls */
dummy_execute_data = *EG(current_execute_data);
dummy_execute_data.prev_execute_data = EG(current_execute_data);
dummy_execute_data.call = NULL;
dummy_execute_data.opline = NULL;
dummy_execute_data.func = NULL;
EG(current_execute_data) = &dummy_execute_data;
}
if (!fci_cache || !fci_cache->initialized) {
zend_string *callable_name;
char *error = NULL;
if (!fci_cache) {
fci_cache = &fci_cache_local;
}
if (!zend_is_callable_ex(&fci->function_name, fci->object, IS_CALLABLE_CHECK_SILENT, &callable_name, fci_cache, &error)) {
if (error) {
zend_error(E_WARNING, "Invalid callback %s, %s", callable_name->val, error);
efree(error);
}
if (callable_name) {
zend_string_release(callable_name);
}
if (EG(current_execute_data) == &dummy_execute_data) {
EG(current_execute_data) = dummy_execute_data.prev_execute_data;
}
return FAILURE;
} else if (error) {
/* Capitalize the first latter of the error message */
if (error[0] >= 'a' && error[0] <= 'z') {
error[0] += ('A' - 'a');
}
zend_error(E_STRICT, "%s", error);
efree(error);
}
zend_string_release(callable_name);
}
func = fci_cache->function_handler;
call = zend_vm_stack_push_call_frame(ZEND_CALL_TOP_FUNCTION,
func, fci->param_count, fci_cache->called_scope, fci_cache->object, NULL);
calling_scope = fci_cache->calling_scope;
fci->object = fci_cache->object;
if (fci->object &&
(!EG(objects_store).object_buckets ||
!IS_OBJ_VALID(EG(objects_store).object_buckets[fci->object->handle]))) {
if (EG(current_execute_data) == &dummy_execute_data) {
EG(current_execute_data) = dummy_execute_data.prev_execute_data;
}
return FAILURE;
}
if (func->common.fn_flags & (ZEND_ACC_ABSTRACT|ZEND_ACC_DEPRECATED)) {
if (func->common.fn_flags & ZEND_ACC_ABSTRACT) {
zend_error_noreturn(E_ERROR, "Cannot call abstract method %s::%s()", func->common.scope->name->val, func->common.function_name->val);
}
if (func->common.fn_flags & ZEND_ACC_DEPRECATED) {
zend_error(E_DEPRECATED, "Function %s%s%s() is deprecated",
func->common.scope ? func->common.scope->name->val : "",
func->common.scope ? "::" : "",
func->common.function_name->val);
}
}
for (i=0; i<fci->param_count; i++) {
zval *param;
if (ARG_SHOULD_BE_SENT_BY_REF(func, i + 1)) {
// TODO: Scalar values don't have reference counters anymore.
// They are assumed to be 1, and they may be easily passed by
// reference now. However, previously scalars with refcount==1
// might be passed and with refcount>1 might not. We can support
// only single behavior ???
#if 0
if (Z_REFCOUNTED(fci->params[i]) &&
// This solution breaks the following test (omit warning message) ???
// Zend/tests/bug61273.phpt
// ext/reflection/tests/bug42976.phpt
// ext/standard/tests/general_functions/call_user_func_array_variation_001.phpt
#else
if (!Z_REFCOUNTED(fci->params[i]) ||
// This solution breaks the following test (emit warning message) ???
// ext/pdo_sqlite/tests/pdo_005.phpt
#endif
(!Z_ISREF(fci->params[i]) && Z_REFCOUNT(fci->params[i]) > 1)) {
if (fci->no_separation &&
!ARG_MAY_BE_SENT_BY_REF(func, i + 1)) {
if (i) {
/* hack to clean up the stack */
ZEND_CALL_NUM_ARGS(call) = i;
zend_vm_stack_free_args(call);
}
zend_vm_stack_free_call_frame(call);
zend_error(E_WARNING, "Parameter %d to %s%s%s() expected to be a reference, value given",
i+1,
func->common.scope ? func->common.scope->name->val : "",
func->common.scope ? "::" : "",
func->common.function_name->val);
if (EG(current_execute_data) == &dummy_execute_data) {
EG(current_execute_data) = dummy_execute_data.prev_execute_data;
}
return FAILURE;
}
if (Z_REFCOUNTED(fci->params[i])) {
Z_DELREF(fci->params[i]);
}
ZVAL_DUP(&tmp, &fci->params[i]);
ZVAL_NEW_REF(&fci->params[i], &tmp);
Z_ADDREF(fci->params[i]);
} else if (!Z_ISREF(fci->params[i])) {
ZVAL_NEW_REF(&fci->params[i], &fci->params[i]);
Z_ADDREF(fci->params[i]);
} else if (Z_REFCOUNTED(fci->params[i])) {
Z_ADDREF(fci->params[i]);
}
param = ZEND_CALL_ARG(call, i+1);
ZVAL_COPY_VALUE(param, &fci->params[i]);
} else if (Z_ISREF(fci->params[i]) &&
/* don't separate references for __call */
(func->common.fn_flags & ZEND_ACC_CALL_VIA_HANDLER) == 0 ) {
param = ZEND_CALL_ARG(call, i+1);
ZVAL_DUP(param, Z_REFVAL(fci->params[i]));
} else {
param = ZEND_CALL_ARG(call, i+1);
ZVAL_COPY(param, &fci->params[i]);
}
}
ZEND_CALL_NUM_ARGS(call) = fci->param_count;
EG(scope) = calling_scope;
if (func->common.fn_flags & ZEND_ACC_STATIC) {
fci->object = NULL;
}
if (!fci->object) {
Z_OBJ(call->This) = NULL;
} else {
Z_OBJ(call->This) = fci->object;
GC_REFCOUNT(fci->object)++;
}
if (func->type == ZEND_USER_FUNCTION) {
EG(scope) = func->common.scope;
call->symbol_table = fci->symbol_table;
if (EXPECTED((func->op_array.fn_flags & ZEND_ACC_GENERATOR) == 0)) {
zend_init_execute_data(call, &func->op_array, fci->retval);
zend_execute_ex(call);
} else {
zend_generator_create_zval(call, &func->op_array, fci->retval);
}
} else if (func->type == ZEND_INTERNAL_FUNCTION) {
int call_via_handler = (func->common.fn_flags & ZEND_ACC_CALL_VIA_HANDLER) != 0;
ZVAL_NULL(fci->retval);
if (func->common.scope) {
EG(scope) = func->common.scope;
}
call->prev_execute_data = EG(current_execute_data);
call->return_value = NULL; /* this is not a constructor call */
EG(current_execute_data) = call;
if (EXPECTED(zend_execute_internal == NULL)) {
/* saves one function call if zend_execute_internal is not used */
func->internal_function.handler(call, fci->retval);
} else {
zend_execute_internal(call, fci->retval);
}
EG(current_execute_data) = call->prev_execute_data;
zend_vm_stack_free_args(call);
zend_vm_stack_free_call_frame(call);
/* We shouldn't fix bad extensions here,
because it can break proper ones (Bug #34045)
if (!EX(function_state).function->common.return_reference)
{
INIT_PZVAL(f->retval);
}*/
if (EG(exception)) {
zval_ptr_dtor(fci->retval);
ZVAL_UNDEF(fci->retval);
}
if (call_via_handler) {
/* We must re-initialize function again */
fci_cache->initialized = 0;
}
} else { /* ZEND_OVERLOADED_FUNCTION */
ZVAL_NULL(fci->retval);
/* Not sure what should be done here if it's a static method */
if (fci->object) {
call->prev_execute_data = EG(current_execute_data);
EG(current_execute_data) = call;
fci->object->handlers->call_method(func->common.function_name, fci->object, call, fci->retval);
EG(current_execute_data) = call->prev_execute_data;
} else {
zend_error_noreturn(E_ERROR, "Cannot call overloaded function for non-object");
}
zend_vm_stack_free_args(call);
zend_vm_stack_free_call_frame(call);
if (func->type == ZEND_OVERLOADED_FUNCTION_TEMPORARY) {
zend_string_release(func->common.function_name);
}
efree(func);
if (EG(exception)) {
zval_ptr_dtor(fci->retval);
ZVAL_UNDEF(fci->retval);
}
}
if (fci->object) {
OBJ_RELEASE(fci->object);
}
EG(scope) = orig_scope;
if (EG(current_execute_data) == &dummy_execute_data) {
EG(current_execute_data) = dummy_execute_data.prev_execute_data;
}
if (EG(exception)) {
zend_throw_exception_internal(NULL);
}
return SUCCESS;
}
/* }}} */
ZEND_API zend_class_entry *zend_lookup_class_ex(zend_string *name, const zval *key, int use_autoload) /* {{{ */
{
zend_class_entry *ce = NULL;
zval args[1];
zval local_retval;
int retval;
zend_string *lc_name;
zend_fcall_info fcall_info;
zend_fcall_info_cache fcall_cache;
if (key) {
lc_name = Z_STR_P(key);
} else {
if (name == NULL || !name->len) {
return NULL;
}
if (name->val[0] == '\\') {
lc_name = zend_string_alloc(name->len - 1, 0);
zend_str_tolower_copy(lc_name->val, name->val + 1, name->len - 1);
} else {
lc_name = zend_string_alloc(name->len, 0);
zend_str_tolower_copy(lc_name->val, name->val, name->len);
}
}
ce = zend_hash_find_ptr(EG(class_table), lc_name);
if (ce) {
if (!key) {
zend_string_free(lc_name);
}
return ce;
}
/* The compiler is not-reentrant. Make sure we __autoload() only during run-time
* (doesn't impact functionality of __autoload()
*/
if (!use_autoload || zend_is_compiling()) {
if (!key) {
zend_string_free(lc_name);
}
return NULL;
}
if (!EG(autoload_func)) {
zend_function *func = zend_hash_str_find_ptr(EG(function_table), ZEND_AUTOLOAD_FUNC_NAME, sizeof(ZEND_AUTOLOAD_FUNC_NAME) - 1);
if (func) {
EG(autoload_func) = func;
} else {
if (!key) {
zend_string_free(lc_name);
}
return NULL;
}
}
/* Verify class name before passing it to __autoload() */
if (strspn(name->val, "0123456789_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ\177\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377\\") != name->len) {
if (!key) {
zend_string_free(lc_name);
}
return NULL;
}
if (EG(in_autoload) == NULL) {
ALLOC_HASHTABLE(EG(in_autoload));
zend_hash_init(EG(in_autoload), 8, NULL, NULL, 0);
}
if (zend_hash_add_empty_element(EG(in_autoload), lc_name) == NULL) {
if (!key) {
zend_string_free(lc_name);
}
return NULL;
}
ZVAL_UNDEF(&local_retval);
if (name->val[0] == '\\') {
ZVAL_STRINGL(&args[0], name->val + 1, name->len - 1);
} else {
ZVAL_STR_COPY(&args[0], name);
}