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zend_execute_API.c
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 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]> |
+----------------------------------------------------------------------+
*/
#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"
#include "zend_weakrefs.h"
#include "zend_inheritance.h"
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.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);
ZEND_API zend_class_entry *(*zend_autoload)(zend_string *name, zend_string *lc_name);
/* true globals */
ZEND_API const zend_fcall_info empty_fcall_info = {0};
ZEND_API const zend_fcall_info_cache empty_fcall_info_cache = { 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_constant_full(zval *zv) /* {{{ */
{
zend_constant *c = Z_PTR_P(zv);
return (ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT) ? ZEND_HASH_APPLY_KEEP : ZEND_HASH_APPLY_REMOVE;
}
/* }}} */
static 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_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_ERROR(&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);
EG(symtable_cache_limit) = EG(symtable_cache) + SYMTABLE_CACHE_SIZE;
EG(no_extensions) = 0;
EG(function_table) = CG(function_table);
EG(class_table) = CG(class_table);
EG(in_autoload) = NULL;
EG(error_handling) = EH_NORMAL;
EG(flags) = EG_FLAGS_INITIAL;
zend_vm_stack_init();
zend_hash_init(&EG(symbol_table), 64, NULL, ZVAL_PTR_DTOR, 0);
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));
ZVAL_UNDEF(&EG(user_exception_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;
EG(vm_interrupt) = 0;
EG(timed_out) = 0;
EG(exception) = NULL;
EG(prev_exception) = NULL;
EG(fake_scope) = NULL;
EG(trampoline).common.function_name = 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(persistent_constants_count) = EG(zend_constants)->nNumUsed;
EG(persistent_functions_count) = EG(function_table)->nNumUsed;
EG(persistent_classes_count) = EG(class_table)->nNumUsed;
EG(get_gc_buffer).start = EG(get_gc_buffer).end = EG(get_gc_buffer).cur = NULL;
zend_weakrefs_init();
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);
}
/* }}} */
static ZEND_COLD 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_string *key;
zval *zv;
#if ZEND_DEBUG
zend_bool fast_shutdown = 0;
#else
zend_bool fast_shutdown = is_zend_mm() && !EG(full_tables_cleanup);
#endif
zend_try {
zend_llist_destroy(&CG(open_files));
} zend_end_try();
EG(flags) |= EG_FLAGS_IN_RESOURCE_SHUTDOWN;
zend_try {
zend_close_rsrc_list(&EG(regular_list));
} zend_end_try();
/* No PHP callback functions should be called after this point. */
EG(active) = 0;
if (!fast_shutdown) {
zend_hash_graceful_reverse_destroy(&EG(symbol_table));
/* Release static properties and static variables prior to the final GC run,
* as they may hold GC roots. */
ZEND_HASH_REVERSE_FOREACH_VAL(EG(function_table), zv) {
zend_op_array *op_array = Z_PTR_P(zv);
if (op_array->type == ZEND_INTERNAL_FUNCTION) {
break;
}
if (op_array->static_variables) {
HashTable *ht = ZEND_MAP_PTR_GET(op_array->static_variables_ptr);
if (ht) {
zend_array_release(ht);
ZEND_MAP_PTR_SET(op_array->static_variables_ptr, NULL);
}
}
} ZEND_HASH_FOREACH_END();
ZEND_HASH_REVERSE_FOREACH_VAL(EG(class_table), zv) {
zend_class_entry *ce = Z_PTR_P(zv);
if (ce->default_static_members_count) {
zend_cleanup_internal_class_data(ce);
}
if (ce->ce_flags & ZEND_HAS_STATIC_IN_METHODS) {
zend_op_array *op_array;
ZEND_HASH_FOREACH_PTR(&ce->function_table, op_array) {
if (op_array->type == ZEND_USER_FUNCTION) {
if (op_array->static_variables) {
HashTable *ht = ZEND_MAP_PTR_GET(op_array->static_variables_ptr);
if (ht) {
zend_array_release(ht);
ZEND_MAP_PTR_SET(op_array->static_variables_ptr, NULL);
}
}
}
} ZEND_HASH_FOREACH_END();
}
} ZEND_HASH_FOREACH_END();
/* Also release error and exception handlers, which may hold objects. */
if (Z_TYPE(EG(user_error_handler)) != IS_UNDEF) {
zval_ptr_dtor(&EG(user_error_handler));
ZVAL_UNDEF(&EG(user_error_handler));
}
if (Z_TYPE(EG(user_exception_handler)) != IS_UNDEF) {
zval_ptr_dtor(&EG(user_exception_handler));
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);
#if ZEND_DEBUG
if (gc_enabled() && !CG(unclean_shutdown)) {
gc_collect_cycles();
}
#endif
}
zend_objects_store_free_object_storage(&EG(objects_store), fast_shutdown);
zend_weakrefs_shutdown();
zend_try {
zend_llist_apply(&zend_extensions, (llist_apply_func_t) zend_extension_deactivator);
} zend_end_try();
if (fast_shutdown) {
/* Fast Request Shutdown
* =====================
* Zend Memory Manager frees memory by its own. We don't have to free
* each allocated block separately.
*/
zend_hash_discard(EG(zend_constants), EG(persistent_constants_count));
zend_hash_discard(EG(function_table), EG(persistent_functions_count));
zend_hash_discard(EG(class_table), EG(persistent_classes_count));
zend_cleanup_internal_classes();
} else {
zend_vm_stack_destroy();
if (EG(full_tables_cleanup)) {
zend_hash_reverse_apply(EG(zend_constants), clean_non_persistent_constant_full);
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_FOREACH_STR_KEY_VAL(EG(zend_constants), key, zv) {
zend_constant *c = Z_PTR_P(zv);
if (_idx == EG(persistent_constants_count)) {
break;
}
zval_ptr_dtor_nogc(&c->value);
if (c->name) {
zend_string_release_ex(c->name, 0);
}
efree(c);
zend_string_release_ex(key, 0);
} ZEND_HASH_FOREACH_END_DEL();
ZEND_HASH_REVERSE_FOREACH_STR_KEY_VAL(EG(function_table), key, zv) {
zend_function *func = Z_PTR_P(zv);
if (_idx == EG(persistent_functions_count)) {
break;
}
destroy_op_array(&func->op_array);
zend_string_release_ex(key, 0);
} ZEND_HASH_FOREACH_END_DEL();
ZEND_HASH_REVERSE_FOREACH_STR_KEY_VAL(EG(class_table), key, zv) {
if (_idx == EG(persistent_classes_count)) {
break;
}
destroy_zend_class(zv);
zend_string_release_ex(key, 0);
} ZEND_HASH_FOREACH_END_DEL();
}
while (EG(symtable_cache_ptr) > EG(symtable_cache)) {
EG(symtable_cache_ptr)--;
zend_hash_destroy(*EG(symtable_cache_ptr));
FREE_HASHTABLE(*EG(symtable_cache_ptr));
}
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));
}
if (EG(ht_iterators) != EG(ht_iterators_slots)) {
efree(EG(ht_iterators));
}
}
#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;
zend_shutdown_fpu();
}
/* }}} */
/* 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 *get_active_function_arg_name(uint32_t arg_num) /* {{{ */
{
zend_function *func;
if (!zend_is_executing()) {
return NULL;
}
func = EG(current_execute_data)->func;
return get_function_arg_name(func, arg_num);
}
/* }}} */
ZEND_API const char *get_function_arg_name(const zend_function *func, uint32_t arg_num) /* {{{ */
{
if (!func || func->common.num_args < arg_num) {
return NULL;
}
switch (func->type) {
case ZEND_USER_FUNCTION:
return ZSTR_VAL(func->common.arg_info[arg_num - 1].name);
case ZEND_INTERNAL_FUNCTION:
return ((zend_internal_arg_info*) func->common.arg_info)[arg_num - 1].name;
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 uint32_t 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_class_entry *zend_get_executed_scope(void) /* {{{ */
{
zend_execute_data *ex = EG(current_execute_data);
while (1) {
if (!ex) {
return NULL;
} else if (ex->func && (ZEND_USER_CODE(ex->func->type) || ex->func->common.scope)) {
return ex->func->common.scope;
}
ex = ex->prev_execute_data;
}
}
/* }}} */
ZEND_API zend_bool zend_is_executing(void) /* {{{ */
{
return EG(current_execute_data) != 0;
}
/* }}} */
ZEND_API int zval_update_constant_ex(zval *p, zend_class_entry *scope) /* {{{ */
{
if (Z_TYPE_P(p) == IS_CONSTANT_AST) {
zend_ast *ast = Z_ASTVAL_P(p);
if (ast->kind == ZEND_AST_CONSTANT) {
zend_string *name = zend_ast_get_constant_name(ast);
zval *zv = zend_get_constant_ex(name, scope, ast->attr);
if (UNEXPECTED(zv == NULL)) {
return FAILURE;
}
zval_ptr_dtor_nogc(p);
ZVAL_COPY_OR_DUP(p, zv);
} else {
zval tmp;
if (UNEXPECTED(zend_ast_evaluate(&tmp, ast, scope) != SUCCESS)) {
return FAILURE;
}
zval_ptr_dtor_nogc(p);
ZVAL_COPY_VALUE(p, &tmp);
}
}
return SUCCESS;
}
/* }}} */
ZEND_API int zval_update_constant(zval *pp) /* {{{ */
{
return zval_update_constant_ex(pp, EG(current_execute_data) ? zend_get_executed_scope() : CG(active_class_entry));
}
/* }}} */
int _call_user_function_ex(zval *object, zval *function_name, zval *retval_ptr, uint32_t param_count, zval params[], int no_separation) /* {{{ */
{
zend_fcall_info fci;
fci.size = sizeof(fci);
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;
return zend_call_function(&fci, NULL);
}
/* }}} */
int zend_call_function(zend_fcall_info *fci, zend_fcall_info_cache *fci_cache) /* {{{ */
{
uint32_t i;
zend_execute_data *call, dummy_execute_data;
zend_fcall_info_cache fci_cache_local;
zend_function *func;
uint32_t call_info;
void *object_or_called_scope;
zend_class_entry *orig_fake_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 */
}
ZEND_ASSERT(fci->size == sizeof(zend_fcall_info));
/* 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->function_handler) {
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, NULL, fci_cache, &error)) {
if (error) {
zend_string *callable_name
= zend_get_callable_name_ex(&fci->function_name, fci->object);
zend_error(E_WARNING, "Invalid callback %s, %s", ZSTR_VAL(callable_name), error);
efree(error);
zend_string_release_ex(callable_name, 0);
}
if (EG(current_execute_data) == &dummy_execute_data) {
EG(current_execute_data) = dummy_execute_data.prev_execute_data;
}
return FAILURE;
}
ZEND_ASSERT(!error);
}
func = fci_cache->function_handler;
if ((func->common.fn_flags & ZEND_ACC_STATIC) || !fci_cache->object) {
fci->object = NULL;
object_or_called_scope = fci_cache->called_scope;
call_info = ZEND_CALL_TOP_FUNCTION | ZEND_CALL_DYNAMIC;
} else {
fci->object = fci_cache->object;
object_or_called_scope = fci->object;
call_info = ZEND_CALL_TOP_FUNCTION | ZEND_CALL_DYNAMIC | ZEND_CALL_HAS_THIS;
}
call = zend_vm_stack_push_call_frame(call_info,
func, fci->param_count, object_or_called_scope);
if (UNEXPECTED(func->common.fn_flags & ZEND_ACC_DEPRECATED)) {
zend_deprecated_function(func);
if (UNEXPECTED(EG(exception))) {
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;
zend_rethrow_exception(EG(current_execute_data));
}
return FAILURE;
}
}
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) {
/* Separation is enabled -- create a ref */
ZVAL_NEW_REF(arg, arg);
} else if (!ARG_MAY_BE_SENT_BY_REF(func, i + 1)) {
/* By-value send is not allowed -- emit a warning,
* but still perform the call with a by-value send. */
const char *arg_name = get_function_arg_name(func, i + 1);
zend_error(E_WARNING,
"%s%s%s(): Argument #%d%s%s%s must be passed by reference, value given",
func->common.scope ? ZSTR_VAL(func->common.scope->name) : "",
func->common.scope ? "::" : "",
ZSTR_VAL(func->common.function_name),
i+1,
arg_name ? " ($" : "",
arg_name ? arg_name : "",
arg_name ? ")" : ""
);
if (UNEXPECTED(EG(exception))) {
ZEND_CALL_NUM_ARGS(call) = i;
zend_vm_stack_free_args(call);
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;
}
return FAILURE;
}
}
}
} 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);
}
}
param = ZEND_CALL_ARG(call, i+1);
ZVAL_COPY(param, arg);
}
if (UNEXPECTED(func->op_array.fn_flags & ZEND_ACC_CLOSURE)) {
uint32_t call_info;
GC_ADDREF(ZEND_CLOSURE_OBJECT(func));
call_info = ZEND_CALL_CLOSURE;
if (func->common.fn_flags & ZEND_ACC_FAKE_CLOSURE) {
call_info |= ZEND_CALL_FAKE_CLOSURE;
}
ZEND_ADD_CALL_FLAG(call, call_info);
}
orig_fake_scope = EG(fake_scope);
EG(fake_scope) = NULL;
if (func->type == ZEND_USER_FUNCTION) {
int call_via_handler = (func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) != 0;
const zend_op *current_opline_before_exception = EG(opline_before_exception);
uint32_t orig_jit_trace_num = EG(jit_trace_num);
zend_init_func_execute_data(call, &func->op_array, fci->retval);
zend_execute_ex(call);
EG(jit_trace_num) = orig_jit_trace_num;
EG(opline_before_exception) = current_opline_before_exception;
if (call_via_handler) {
/* We must re-initialize function again */
fci_cache->function_handler = NULL;
}
} else {
int call_via_handler = (func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) != 0;
ZEND_ASSERT(func->type == ZEND_INTERNAL_FUNCTION);
ZVAL_NULL(fci->retval);
call->prev_execute_data = EG(current_execute_data);
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);
if (EG(exception)) {
zval_ptr_dtor(fci->retval);
ZVAL_UNDEF(fci->retval);
}
if (call_via_handler) {
/* We must re-initialize function again */
fci_cache->function_handler = NULL;
}
/* This flag is regularly checked while running user functions, but not internal
* So see whether interrupt flag was set while the function was running... */
if (EG(vm_interrupt)) {
EG(vm_interrupt) = 0;
if (EG(timed_out)) {
zend_timeout();
} else if (zend_interrupt_function) {
zend_interrupt_function(EG(current_execute_data));
}
}
}
EG(fake_scope) = orig_fake_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 (UNEXPECTED(EG(exception))) {
if (UNEXPECTED(!EG(current_execute_data))) {
zend_throw_exception_internal(NULL);
} else if (EG(current_execute_data)->func &&
ZEND_USER_CODE(EG(current_execute_data)->func->common.type)) {
zend_rethrow_exception(EG(current_execute_data));
}
}
return SUCCESS;
}
/* }}} */
ZEND_API void zend_call_known_function(
zend_function *fn, zend_object *object, zend_class_entry *called_scope, zval *retval_ptr,
uint32_t param_count, zval *params)
{
zval retval;
zend_fcall_info fci;
zend_fcall_info_cache fcic;
ZEND_ASSERT(fn && "zend_function must be passed!");
fci.size = sizeof(fci);
fci.object = object;
fci.retval = retval_ptr ? retval_ptr : &retval;
fci.param_count = param_count;
fci.params = params;
fci.no_separation = 1;
ZVAL_UNDEF(&fci.function_name); /* Unused */
fcic.function_handler = fn;
fcic.object = object;
fcic.called_scope = called_scope;
int result = zend_call_function(&fci, &fcic);
if (UNEXPECTED(result == FAILURE)) {
if (!EG(exception)) {
zend_error_noreturn(E_CORE_ERROR, "Couldn't execute method %s%s%s",
fn->common.scope ? ZSTR_VAL(fn->common.scope->name) : "",
fn->common.scope ? "::" : "", ZSTR_VAL(fn->common.function_name));
}
}
if (!retval_ptr) {
zval_ptr_dtor(&retval);
}
}
ZEND_API void zend_call_known_instance_method_with_2_params(
zend_function *fn, zend_object *object, zval *retval_ptr, zval *param1, zval *param2)
{
zval params[2];
ZVAL_COPY_VALUE(¶ms[0], param1);
ZVAL_COPY_VALUE(¶ms[1], param2);
zend_call_known_instance_method(fn, object, retval_ptr, 2, params);
}
/* 0-9 a-z A-Z _ \ 0x80-0xff */
static const uint32_t valid_chars[8] = {
0x00000000,
0x03ff0000,
0x97fffffe,
0x07fffffe,
0xffffffff,
0xffffffff,
0xffffffff,
0xffffffff,
};
static zend_bool zend_is_valid_class_name(zend_string *name) {
for (size_t i = 0; i < ZSTR_LEN(name); i++) {
unsigned char c = ZSTR_VAL(name)[i];
if (!ZEND_BIT_TEST(valid_chars, c)) {
return 0;
}
}
return 1;
}
ZEND_API zend_class_entry *zend_lookup_class_ex(zend_string *name, zend_string *key, uint32_t flags) /* {{{ */
{
zend_class_entry *ce = NULL;
zval *zv;
zend_string *lc_name;
zend_string *autoload_name;
if (key) {
lc_name = 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);
}
}
zv = zend_hash_find(EG(class_table), lc_name);
if (zv) {
if (!key) {
zend_string_release_ex(lc_name, 0);
}
ce = (zend_class_entry*)Z_PTR_P(zv);
if (UNEXPECTED(!(ce->ce_flags & ZEND_ACC_LINKED))) {
if ((flags & ZEND_FETCH_CLASS_ALLOW_UNLINKED) ||
((flags & ZEND_FETCH_CLASS_ALLOW_NEARLY_LINKED) &&
(ce->ce_flags & ZEND_ACC_NEARLY_LINKED))) {
ce->ce_flags |= ZEND_ACC_HAS_UNLINKED_USES;
return ce;
}
return NULL;
}
return ce;
}
/* The compiler is not-reentrant. Make sure we autoload only during run-time. */
if ((flags & ZEND_FETCH_CLASS_NO_AUTOLOAD) || zend_is_compiling()) {
if (!key) {
zend_string_release_ex(lc_name, 0);
}
return NULL;
}
if (!zend_autoload) {
if (!key) {
zend_string_release_ex(lc_name, 0);
}
return NULL;
}
/* Verify class name before passing it to the autoloader. */
if (!key && !zend_is_valid_class_name(name)) {
zend_string_release_ex(lc_name, 0);
return NULL;
}
if (EG(in_autoload) == NULL) {
ALLOC_HASHTABLE(EG(in_autoload));
zend_hash_init(EG(in_autoload), 8, NULL, NULL, 0);
}