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zend_execute_API.c
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2016 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]> |
| Dmitry Stogov <[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
ZEND_TLS 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 ZEND_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));
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), 64, NULL, ZVAL_PTR_DTOR, 0);
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(ht_iterators_count) = sizeof(EG(ht_iterators_slots)) / sizeof(HashTableIterator);
EG(ht_iterators_used) = 0;
EG(ht_iterators) = EG(ht_iterators_slots);
memset(EG(ht_iterators), 0, sizeof(EG(ht_iterators_slots)));
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);
}
/* }}} */
static void zend_throw_or_error(int fetch_type, zend_class_entry *exception_ce, const char *format, ...) /* {{{ */
{
va_list va;
char *message = NULL;
va_start(va, format);
zend_vspprintf(&message, 0, format, va);
if (fetch_type & ZEND_FETCH_CLASS_EXCEPTION) {
zend_throw_error(exception_ce, "%s", message);
} else {
zend_error(E_ERROR, "%s", message);
}
efree(message);
va_end(va);
}
/* }}} */
void shutdown_destructors(void) /* {{{ */
{
if (CG(unclean_shutdown)) {
EG(symbol_table).pDestructor = zend_unclean_zval_ptr_dtor;
}
zend_try {
uint32_t symbols;
do {
symbols = zend_hash_num_elements(&EG(symbol_table));
zend_hash_reverse_apply(&EG(symbol_table), (apply_func_t) zval_call_destructor);
} while (symbols != zend_hash_num_elements(&EG(symbol_table)));
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).pDestructor = zend_unclean_zval_ptr_dtor;
}
zend_hash_graceful_reverse_destroy(&EG(symbol_table));
} 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_PTR_DTOR, 1);
zend_stack_clean(&EG(user_exception_handlers), (void (*)(void *))ZVAL_PTR_DTOR, 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();
#if ZEND_DEBUG
if (GC_G(gc_enabled) && !CG(unclean_shutdown)) {
gc_collect_cycles();
}
#endif
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));
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();
#if ZEND_DEBUG
if (EG(ht_iterators_used) && !CG(unclean_shutdown)) {
zend_error(E_WARNING, "Leaked %" PRIu32 " hashtable iterators", EG(ht_iterators_used));
}
#endif
EG(ht_iterators_used) = 0;
if (EG(ht_iterators) != EG(ht_iterators_slots)) {
efree(EG(ht_iterators));
}
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 ? ZSTR_VAL(ce->name) : "";
}
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 ZSTR_VAL(function_name);
} else {
return "main";
}
}
break;
case ZEND_INTERNAL_FUNCTION:
return ZSTR_VAL(func->common.function_name);
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 ZSTR_VAL(ex->func->op_array.filename);
} else {
return "[no active file]";
}
}
/* }}} */
ZEND_API zend_string *zend_get_executed_filename_ex(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;
} else {
return NULL;
}
}
/* }}} */
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
#define RESET_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_throw_error(NULL, "Cannot declare self-referencing constant '%s'", Z_STRVAL_P(p));
return FAILURE;
} else if (Z_TYPE_P(p) == IS_CONSTANT) {
SEPARATE_ZVAL_NOREF(p);
MARK_CONSTANT_VISITED(p);
if (Z_CONST_FLAGS_P(p) & IS_CONSTANT_CLASS) {
ZEND_ASSERT(EG(current_execute_data));
if (inline_change) {
zend_string_release(Z_STR_P(p));
}
if (EG(scope) && EG(scope)->name) {
ZVAL_STR_COPY(p, EG(scope)->name);
} else {
ZVAL_EMPTY_STRING(p);
}
} else if (UNEXPECTED((const_value = zend_get_constant_ex(Z_STR_P(p), scope, Z_CONST_FLAGS_P(p))) == NULL)) {
char *actual = Z_STRVAL_P(p);
if (UNEXPECTED(EG(exception))) {
RESET_CONSTANT_VISITED(p);
return FAILURE;
} else if ((colon = (char*)zend_memrchr(Z_STRVAL_P(p), ':', Z_STRLEN_P(p)))) {
zend_throw_error(NULL, "Undefined class constant '%s'", Z_STRVAL_P(p));
RESET_CONSTANT_VISITED(p);
return FAILURE;
} 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 (ZSTR_VAL(save)[0] == '\\') {
zend_throw_error(NULL, "Undefined constant '%s'", ZSTR_VAL(save) + 1);
} else {
zend_throw_error(NULL, "Undefined constant '%s'", ZSTR_VAL(save));
}
if (inline_change) {
zend_string_release(save);
}
RESET_CONSTANT_VISITED(p);
return FAILURE;
} else {
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 && ZSTR_VAL(save) != 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)) {
if (UNEXPECTED(zval_update_constant_ex(p, 1, NULL) != SUCCESS)) {
RESET_CONSTANT_VISITED(p);
return FAILURE;
}
}
zval_opt_copy_ctor(p);
}
} else if (Z_TYPE_P(p) == IS_CONSTANT_AST) {
zval tmp;
if (UNEXPECTED(zend_ast_evaluate(&tmp, Z_ASTVAL_P(p), scope) != SUCCESS)) {
return FAILURE;
}
if (inline_change) {
zval_ptr_dtor(p);
}
ZVAL_COPY_VALUE(p, &tmp);
}
return SUCCESS;
}
/* }}} */
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_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_noreturn(E_CORE_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 &&
EG(current_execute_data)->opline->opcode != ZEND_DO_ICALL &&
EG(current_execute_data)->opline->opcode != ZEND_DO_UCALL &&
EG(current_execute_data)->opline->opcode != ZEND_DO_FCALL_BY_NAME) {
/* 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", ZSTR_VAL(callable_name), 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_DEPRECATED, "%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);
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_throw_error(NULL, "Cannot call abstract method %s::%s()", ZSTR_VAL(func->common.scope->name), ZSTR_VAL(func->common.function_name));
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_DEPRECATED) {
zend_error(E_DEPRECATED, "Function %s%s%s() is deprecated",
func->common.scope ? ZSTR_VAL(func->common.scope->name) : "",
func->common.scope ? "::" : "",
ZSTR_VAL(func->common.function_name));
}
}
for (i=0; i<fci->param_count; i++) {
zval *param;
zval *arg = &fci->params[i];
if (ARG_SHOULD_BE_SENT_BY_REF(func, i + 1)) {
if (UNEXPECTED(!Z_ISREF_P(arg))) {
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 ? ZSTR_VAL(func->common.scope->name) : "",
func->common.scope ? "::" : "",
ZSTR_VAL(func->common.function_name));
if (EG(current_execute_data) == &dummy_execute_data) {
EG(current_execute_data) = dummy_execute_data.prev_execute_data;
}
return FAILURE;
}
ZVAL_NEW_REF(arg, arg);
}
Z_ADDREF_P(arg);
} else {
if (Z_ISREF_P(arg) &&
!(func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE)) {
/* don't separate references for __call */
arg = Z_REFVAL_P(arg);
}
if (Z_OPT_REFCOUNTED_P(arg)) {
Z_ADDREF_P(arg);
}
}
param = ZEND_CALL_ARG(call, i+1);
ZVAL_COPY_VALUE(param, arg);
}
EG(scope) = calling_scope;
if (func->common.fn_flags & ZEND_ACC_STATIC) {
fci->object = NULL;
}
Z_OBJ(call->This) = fci->object;
if (UNEXPECTED(func->op_array.fn_flags & ZEND_ACC_CLOSURE)) {
ZEND_ASSERT(GC_TYPE((zend_object*)func->op_array.prototype) == IS_OBJECT);
GC_REFCOUNT((zend_object*)func->op_array.prototype)++;
ZEND_ADD_CALL_FLAG(call, ZEND_CALL_CLOSURE);
}
/* PHP-7 doesn't support symbol_table substitution for functions */
ZEND_ASSERT(fci->symbol_table == NULL);
if (func->type == ZEND_USER_FUNCTION) {
int call_via_handler = (func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) != 0;
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);
}
if (call_via_handler) {
/* We must re-initialize function again */
fci_cache->initialized = 0;
}
} else if (func->type == ZEND_INTERNAL_FUNCTION) {
int call_via_handler = (func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) != 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);
/* 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_throw_error(NULL, "Cannot call overloaded function for non-object");
}
zend_vm_stack_free_args(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);
}
}
EG(scope) = orig_scope;
zend_vm_stack_free_call_frame(call);
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;
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 || !ZSTR_LEN(name)) {
return NULL;
}
if (ZSTR_VAL(name)[0] == '\\') {
lc_name = zend_string_alloc(ZSTR_LEN(name) - 1, 0);
zend_str_tolower_copy(ZSTR_VAL(lc_name), ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 1);
} else {
lc_name = zend_string_tolower(name);
}
}
ce = zend_hash_find_ptr(EG(class_table), lc_name);
if (ce) {
if (!key) {
zend_string_release(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_release(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_release(lc_name);
}
return NULL;
}
}