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Copy pathzend_execute_API.c
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2025 lines (1758 loc) · 55.7 KB
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright © Zend Technologies Ltd., a subsidiary company of |
| Perforce Software, Inc., and Contributors. |
+----------------------------------------------------------------------+
| This source file is subject to the Modified BSD License that is |
| bundled with this package in the file LICENSE, and is available |
| through the World Wide Web at <https://www.php.net/license/>. |
| |
| SPDX-License-Identifier: BSD-3-Clause |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@php.net> |
| Zeev Suraski <zeev@php.net> |
| Dmitry Stogov <dmitry@php.net> |
+----------------------------------------------------------------------+
*/
#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_fibers.h"
#include "zend_weakrefs.h"
#include "zend_inheritance.h"
#include "zend_observer.h"
#include "zend_call_stack.h"
#include "zend_frameless_function.h"
#include "zend_partial.h"
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef ZEND_MAX_EXECUTION_TIMERS
#include <sys/syscall.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);
#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(void) /* {{{ */
{
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(const zend_extension *extension) /* {{{ */
{
if (extension->activate) {
extension->activate();
}
}
/* }}} */
static void zend_extension_deactivator(const 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) /* {{{ */
{
const 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) /* {{{ */
{
const 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
ZVAL_UNDEF(&EG(last_fatal_error_backtrace));
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(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);
zend_hash_init(&EG(autoload_current_classnames), 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);
zend_lazy_objects_init(&EG(lazy_objects_store));
EG(full_tables_cleanup) = 0;
ZEND_ATOMIC_BOOL_INIT(&EG(vm_interrupt), false);
ZEND_ATOMIC_BOOL_INIT(&EG(timed_out), false);
EG(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;
EG(record_errors) = false;
memset(&EG(errors), 0, sizeof(EG(errors)));
EG(filename_override) = NULL;
EG(lineno_override) = -1;
zend_max_execution_timer_init();
zend_fiber_init();
zend_weakrefs_init();
zend_hash_init(&EG(callable_convert_cache), 8, NULL, ZVAL_PTR_DTOR, 0);
zend_hash_init(&EG(partial_function_application_cache), 8, NULL, zend_partial_op_array_dtor, 0);
zend_stack_init(&EG(lambda_cache), sizeof(zend_object *));
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(uint32_t 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_noreturn(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();
}
/* }}} */
static void lambda_dtor(zend_object **closure_ptr)
{
zend_object *closure = *closure_ptr;
if (GC_DELREF(closure) == 0) {
zend_objects_store_del(closure);
}
}
/* Free values held by the executor. */
ZEND_API void zend_shutdown_executor_values(bool fast_shutdown)
{
EG(flags) |= EG_FLAGS_IN_RESOURCE_SHUTDOWN;
zend_close_rsrc_list(&EG(regular_list));
/* No PHP callback functions should be called after this point. */
EG(active) = 0;
if (!fast_shutdown) {
zval *zv;
zend_hash_graceful_reverse_destroy(&EG(symbol_table));
/* Constants may contain objects, destroy them before the object store. */
if (EG(full_tables_cleanup)) {
zend_hash_reverse_apply(EG(zend_constants), clean_non_persistent_constant_full);
} else {
zend_string *key;
ZEND_HASH_MAP_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);
}
if (c->filename) {
zend_string_release_ex(c->filename, 0);
}
if (c->attributes) {
zend_hash_release(c->attributes);
}
efree(c);
zend_string_release_ex(key, 0);
} ZEND_HASH_MAP_FOREACH_END_DEL();
}
zval_ptr_dtor(&EG(last_fatal_error_backtrace));
ZVAL_UNDEF(&EG(last_fatal_error_backtrace));
/* Release static properties and static variables prior to the final GC run,
* as they may hold GC roots. */
ZEND_HASH_MAP_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 (ZEND_MAP_PTR(op_array->static_variables_ptr)) {
HashTable *ht = ZEND_MAP_PTR_GET(op_array->static_variables_ptr);
if (ht) {
zend_array_destroy(ht);
ZEND_MAP_PTR_SET(op_array->static_variables_ptr, NULL);
}
}
} ZEND_HASH_FOREACH_END();
ZEND_HASH_MAP_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 (ZEND_MAP_PTR(ce->mutable_data)) {
if (ZEND_MAP_PTR_GET_IMM(ce->mutable_data)) {
zend_cleanup_mutable_class_data(ce);
}
} else if (ce->type == ZEND_USER_CLASS && !(ce->ce_flags & ZEND_ACC_IMMUTABLE)) {
/* Constants may contain objects, destroy the values before the object store. */
zend_class_constant *c;
ZEND_HASH_MAP_FOREACH_PTR(&ce->constants_table, c) {
if (c->ce == ce) {
zval_ptr_dtor_nogc(&c->value);
ZVAL_UNDEF(&c->value);
}
} ZEND_HASH_FOREACH_END();
/* properties may contain objects as well */
if (ce->default_properties_table) {
zval *p = ce->default_properties_table;
zval *end = p + ce->default_properties_count;
while (p != end) {
i_zval_ptr_dtor(p);
ZVAL_UNDEF(p);
p++;
}
}
}
if (ce->type == ZEND_USER_CLASS && ce->backed_enum_table) {
ZEND_ASSERT(!(ce->ce_flags & ZEND_ACC_IMMUTABLE));
zend_hash_release(ce->backed_enum_table);
ce->backed_enum_table = NULL;
}
if (ce->ce_flags & ZEND_HAS_STATIC_IN_METHODS) {
zend_op_array *op_array;
ZEND_HASH_MAP_FOREACH_PTR(&ce->function_table, op_array) {
if (op_array->type == ZEND_USER_FUNCTION) {
if (ZEND_MAP_PTR(op_array->static_variables_ptr)) {
HashTable *ht = ZEND_MAP_PTR_GET(op_array->static_variables_ptr);
if (ht) {
zend_array_destroy(ht);
ZEND_MAP_PTR_SET(op_array->static_variables_ptr, NULL);
}
}
}
} ZEND_HASH_FOREACH_END();
if (ce->num_hooked_props) {
zend_property_info *prop_info;
ZEND_HASH_MAP_FOREACH_PTR(&ce->properties_info, prop_info) {
if (prop_info->ce == ce) {
if (prop_info->hooks) {
for (uint32_t i = 0; i < ZEND_PROPERTY_HOOK_COUNT; i++) {
if (prop_info->hooks[i]) {
ZEND_ASSERT(ZEND_USER_CODE(prop_info->hooks[i]->type));
op_array = &prop_info->hooks[i]->op_array;
if (ZEND_MAP_PTR(op_array->static_variables_ptr)) {
HashTable *ht = ZEND_MAP_PTR_GET(op_array->static_variables_ptr);
if (ht) {
zend_array_destroy(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);
zend_hash_clean(&EG(callable_convert_cache));
zend_hash_clean(&EG(partial_function_application_cache));
zend_stack_clean(&EG(lambda_cache), (void (*)(void *)) lambda_dtor, 1);
#if ZEND_DEBUG
if (!CG(unclean_shutdown)) {
gc_collect_cycles();
}
#endif
} else {
zend_hash_discard(EG(zend_constants), EG(persistent_constants_count));
}
zend_objects_store_free_object_storage(&EG(objects_store), fast_shutdown);
}
void shutdown_executor(void) /* {{{ */
{
#if ZEND_DEBUG
bool fast_shutdown = 0;
#elif defined(__SANITIZE_ADDRESS__)
char *force_fast_shutdown = getenv("ZEND_ASAN_FORCE_FAST_SHUTDOWN");
bool fast_shutdown = (
is_zend_mm()
|| (force_fast_shutdown && ZEND_ATOL(force_fast_shutdown))
) && !EG(full_tables_cleanup);
#else
bool fast_shutdown = is_zend_mm() && !EG(full_tables_cleanup);
#endif
zend_try {
zend_stream_shutdown();
} zend_end_try();
zend_shutdown_executor_values(fast_shutdown);
zend_weakrefs_shutdown();
zend_max_execution_timer_shutdown();
zend_fiber_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(function_table), EG(persistent_functions_count));
zend_hash_discard(EG(class_table), EG(persistent_classes_count));
} else {
zend_vm_stack_destroy();
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_string *key;
zval *zv;
ZEND_HASH_MAP_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_MAP_FOREACH_END_DEL();
ZEND_HASH_MAP_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_MAP_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_hash_destroy(&EG(autoload_current_classnames));
zend_stack_destroy(&EG(user_error_handlers_error_reporting));
zend_stack_destroy(&EG(user_error_handlers));
zend_stack_destroy(&EG(user_exception_handlers));
zend_lazy_objects_destroy(&EG(lazy_objects_store));
zend_objects_store_destroy(&EG(objects_store));
if (EG(ht_iterators) != EG(ht_iterators_slots)) {
efree(EG(ht_iterators));
}
zend_hash_destroy(&EG(callable_convert_cache));
zend_hash_destroy(&EG(partial_function_application_cache));
}
#if ZEND_DEBUG
if (EG(ht_iterators_used) && !CG(unclean_shutdown)) {
zend_error(E_WARNING, "Leaked %" PRIu32 " hashtable iterators", EG(ht_iterators_used));
}
#endif
/* Check whether anyone is hogging the trampoline. */
ZEND_ASSERT(EG(trampoline).common.function_name == NULL || CG(unclean_shutdown));
EG(ht_iterators_used) = 0;
zend_shutdown_fpu();
}
/* }}} */
/* return class name and "::" or "". */
ZEND_API const char *get_active_class_name(const char **space) /* {{{ */
{
const zend_function *func;
if (!zend_is_executing()) {
if (space) {
*space = "";
}
return "";
}
func = zend_active_function();
switch (func->type) {
case ZEND_USER_FUNCTION:
case ZEND_INTERNAL_FUNCTION:
{
const 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) /* {{{ */
{
const zend_function *func;
if (!zend_is_executing()) {
return NULL;
}
func = zend_active_function();
switch (func->type) {
case ZEND_USER_FUNCTION: {
const 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 zend_function *zend_active_function_ex(const zend_execute_data *execute_data)
{
const zend_function *func = EX(func);
/* Resolve function if op is a frameless call. */
if (ZEND_USER_CODE(func->type)) {
const zend_op *op = EX(opline);
if (ZEND_OP_IS_FRAMELESS_ICALL(op->opcode)) {
func = ZEND_FLF_FUNC(op);
}
}
return func;
}
ZEND_API zend_string *get_active_function_or_method_name(void) /* {{{ */
{
ZEND_ASSERT(zend_is_executing());
return get_function_or_method_name(zend_active_function());
}
/* }}} */
ZEND_API zend_string *get_function_or_method_name(const zend_function *func) /* {{{ */
{
if (func->common.scope && func->common.function_name) {
return zend_create_member_string(func->common.scope->name, func->common.function_name);
}
return func->common.function_name ? zend_string_copy(func->common.function_name) : ZSTR_INIT_LITERAL("main", 0);
}
/* }}} */
ZEND_API const char *get_active_function_arg_name(uint32_t arg_num) /* {{{ */
{
if (!zend_is_executing()) {
return NULL;
}
const zend_function *func = zend_active_function();
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 || arg_num == 0 || func->common.num_args < arg_num) {
return NULL;
}
return ZSTR_VAL(func->common.arg_info[arg_num - 1].name);
}
/* }}} */
ZEND_API const char *zend_get_executed_filename(void) /* {{{ */
{
const zend_string *filename = zend_get_executed_filename_ex();
return filename != NULL ? ZSTR_VAL(filename) : "[no active file]";
}
/* }}} */
ZEND_API zend_string *zend_get_executed_filename_ex(void) /* {{{ */
{
zend_string *filename_override = EG(filename_override);
if (filename_override != NULL) {
return filename_override;
}
const 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_long lineno_override = EG(lineno_override);
if (lineno_override != -1) {
return lineno_override;
}
const 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 (!ex->opline) {
/* Missing SAVE_OPLINE()? Falling back to first line of function */
return ex->func->op_array.opcodes[0].lineno;
}
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) /* {{{ */
{
const 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 bool zend_is_executing(void) /* {{{ */
{
return EG(current_execute_data) != 0;
}
/* }}} */
ZEND_API zend_result ZEND_FASTCALL zval_update_constant_with_ctx(zval *p, zend_class_entry *scope, zend_ast_evaluate_ctx *ctx)
{
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);
const 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;
bool short_circuited;
// Increase the refcount during zend_ast_evaluate to avoid releasing the ast too early
// on nested calls to zval_update_constant_ex which can happen when retriggering ast
// evaluation during autoloading.
zend_ast_ref *ast_ref = Z_AST_P(p);
bool ast_is_refcounted = !(GC_FLAGS(ast_ref) & GC_IMMUTABLE);
if (ast_is_refcounted) {
GC_ADDREF(ast_ref);
}
zend_result result = zend_ast_evaluate_ex(&tmp, ast, scope, &short_circuited, ctx) != SUCCESS;
if (ast_is_refcounted && !GC_DELREF(ast_ref)) {
rc_dtor_func((zend_refcounted *)ast_ref);
}
if (UNEXPECTED(result != SUCCESS)) {
return FAILURE;
}
zval_ptr_dtor_nogc(p);
ZVAL_COPY_VALUE(p, &tmp);
}
}
return SUCCESS;
}
/* }}} */
ZEND_API zend_result ZEND_FASTCALL zval_update_constant_ex(zval *p, zend_class_entry *scope)
{
zend_ast_evaluate_ctx ctx = {0};
return zval_update_constant_with_ctx(p, scope, &ctx);
}
ZEND_API zend_result ZEND_FASTCALL zval_update_constant(zval *pp) /* {{{ */
{
return zval_update_constant_ex(pp, EG(current_execute_data) ? zend_get_executed_scope() : CG(active_class_entry));
}
/* }}} */
zend_result _call_user_function_impl(zval *object, zval *function_name, zval *retval_ptr, uint32_t param_count, zval params[], HashTable *named_params) /* {{{ */
{
zend_fcall_info fci;
fci.size = sizeof(fci);
if (object) {
ZEND_ASSERT(Z_TYPE_P(object) == IS_OBJECT);
fci.object = Z_OBJ_P(object);
} else {
fci.object = NULL;
}
ZVAL_COPY_VALUE(&fci.function_name, function_name);
fci.retval = retval_ptr;
fci.param_count = param_count;
fci.params = params;
fci.named_params = named_params;
fci.consumed_args = 0;
return zend_call_function(&fci, NULL);
}
/* }}} */
zend_result zend_call_function(zend_fcall_info *fci, zend_fcall_info_cache *fci_cache) /* {{{ */
{
zend_execute_data *call;
zend_fcall_info_cache fci_cache_local;
zend_function *func;
uint32_t call_info;
void *object_or_called_scope;
ZVAL_UNDEF(fci->retval);
if (!EG(active)) {
return FAILURE; /* executor is already inactive */
}
if (EG(exception)) {
if (fci_cache) {
zend_release_fcall_info_cache(fci_cache);
}
return SUCCESS; /* we would result in an unstable executor otherwise */
}
ZEND_ASSERT(ZEND_FCI_INITIALIZED(*fci));
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, 0, NULL, fci_cache, &error)) {
ZEND_ASSERT(error && "Should have error if not callable");
zend_string *callable_name
= zend_get_callable_name_ex(&fci->function_name, fci->object);
zend_throw_error(NULL, "Invalid callback %s, %s", ZSTR_VAL(callable_name), error);
efree(error);
zend_string_release_ex(callable_name, 0);
return SUCCESS;
}
ZEND_ASSERT(!error);
}
func = fci_cache->function_handler;
if ((func->common.fn_flags & ZEND_ACC_STATIC) || !fci_cache->object) {
object_or_called_scope = fci_cache->called_scope;
call_info = ZEND_CALL_TOP_FUNCTION | ZEND_CALL_DYNAMIC;
} else {
object_or_called_scope = fci_cache->object;
call_info = ZEND_CALL_TOP_FUNCTION | ZEND_CALL_DYNAMIC | ZEND_CALL_HAS_THIS;
}
if (UNEXPECTED(func->common.fn_flags & ZEND_ACC_DEPRECATED)) {
zend_deprecated_function(func);
if (UNEXPECTED(EG(exception))) {
return SUCCESS;
}
}
#ifdef ZEND_CHECK_STACK_LIMIT
if (UNEXPECTED(zend_call_stack_overflowed(EG(stack_limit)))) {
zend_call_stack_size_error();
zend_release_fcall_info_cache(fci_cache);
return SUCCESS;
}
#endif
call = zend_vm_stack_push_call_frame(call_info,
func, fci->param_count, object_or_called_scope);
uint32_t consumed_args = fci->param_count ? fci->consumed_args : 0;
ZEND_ASSERT((consumed_args & (consumed_args - 1)) == 0);
for (uint32_t i = 0; i < fci->param_count; i++) {
zval *param = ZEND_CALL_ARG(call, i+1);
zval *arg = &fci->params[i];
bool must_wrap = false;
if (UNEXPECTED(Z_ISUNDEF_P(arg))) {
/* Allow forwarding undef slots. This is only used by Closure::__invoke(). */
ZVAL_UNDEF(param);
ZEND_ADD_CALL_FLAG(call, ZEND_CALL_MAY_HAVE_UNDEF);
continue;
}
if (ARG_SHOULD_BE_SENT_BY_REF(func, i + 1)) {
if (UNEXPECTED(!Z_ISREF_P(arg))) {
if (!ARG_MAY_BE_SENT_BY_REF(func, i + 1)) {
/* By-value send is not allowed -- emit a warning,
* and perform the call with the value wrapped in a reference. */
zend_param_must_be_ref(func, i + 1);
must_wrap = true;
if (UNEXPECTED(EG(exception))) {
ZEND_CALL_NUM_ARGS(call) = i;
cleanup_args:
zend_vm_stack_free_args(call);
if (ZEND_CALL_INFO(call) & ZEND_CALL_HAS_EXTRA_NAMED_PARAMS) {
zend_free_extra_named_params(call->extra_named_params);
}
zend_vm_stack_free_call_frame(call);
zend_release_fcall_info_cache(fci_cache);
return SUCCESS;
}
}
}
} 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 (EXPECTED(!must_wrap)) {
if (EXPECTED(consumed_args == 0)
|| !zend_fci_is_consumed_arg(consumed_args, i)
|| Z_ISREF_P(arg)
|| arg != &fci->params[i]) {
ZVAL_COPY(param, arg);
} else {
ZVAL_COPY_VALUE(param, arg);
ZVAL_UNDEF(arg);
}
} else {
Z_TRY_ADDREF_P(arg);
ZVAL_NEW_REF(param, arg);
}
}
if (fci->named_params) {
zend_string *name;
zval *arg;
uint32_t arg_num = ZEND_CALL_NUM_ARGS(call) + 1;
bool have_named_params = false;
ZEND_HASH_FOREACH_STR_KEY_VAL(fci->named_params, name, arg) {
bool must_wrap = false;
zval *target;
if (name) {
void *cache_slot[2] = {NULL, NULL};
have_named_params = true;
target = zend_handle_named_arg(&call, name, &arg_num, cache_slot);
if (!target) {
goto cleanup_args;
}
} else {
if (have_named_params) {
zend_throw_error(NULL,
"Cannot use positional argument after named argument");
goto cleanup_args;
}
zend_vm_stack_extend_call_frame(&call, arg_num - 1, 1);
target = ZEND_CALL_ARG(call, arg_num);
}
if (ARG_SHOULD_BE_SENT_BY_REF(func, arg_num)) {
if (UNEXPECTED(!Z_ISREF_P(arg))) {
if (!ARG_MAY_BE_SENT_BY_REF(func, arg_num)) {
/* By-value send is not allowed -- emit a warning,
* and perform the call with the value wrapped in a reference. */
zend_param_must_be_ref(func, arg_num);
must_wrap = true;
if (UNEXPECTED(EG(exception))) {
goto cleanup_args;
}
}
}
} 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 (EXPECTED(!must_wrap)) {
ZVAL_COPY(target, arg);
} else {
Z_TRY_ADDREF_P(arg);
ZVAL_NEW_REF(target, arg);
}
if (!name) {
ZEND_CALL_NUM_ARGS(call)++;