php-src/Zend/zend_enum.c
Ilija Tovilo 53dbb760da
Fix use-after-free of constant name
The constant name is usually interend. Without opcache, compilation always
interns strings. Without opcache, compilation does not intern (new) strings, but
persisting of script does. If a script is not stored in shm the constant name
will not be interned.

The building of enum backing stores was missing a addref for the constant name,
leading to a double-free when releasing constants and backing stores of enums.

Fixes GH-12366
Closes GH-12405
2023-10-11 11:49:40 +02:00

612 lines
20 KiB
C

/*
+----------------------------------------------------------------------+
| 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 |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Ilija Tovilo <ilutov@php.net> |
+----------------------------------------------------------------------+
*/
#include "zend.h"
#include "zend_API.h"
#include "zend_compile.h"
#include "zend_enum_arginfo.h"
#include "zend_interfaces.h"
#include "zend_enum.h"
#include "zend_extensions.h"
#include "zend_observer.h"
#define ZEND_ENUM_DISALLOW_MAGIC_METHOD(propertyName, methodName) \
do { \
if (ce->propertyName) { \
zend_error_noreturn(E_COMPILE_ERROR, "Enum %s cannot include magic method %s", ZSTR_VAL(ce->name), methodName); \
} \
} while (0);
ZEND_API zend_class_entry *zend_ce_unit_enum;
ZEND_API zend_class_entry *zend_ce_backed_enum;
static zend_object_handlers enum_handlers;
zend_object *zend_enum_new(zval *result, zend_class_entry *ce, zend_string *case_name, zval *backing_value_zv)
{
zend_object *zobj = zend_objects_new(ce);
ZVAL_OBJ(result, zobj);
ZVAL_STR_COPY(OBJ_PROP_NUM(zobj, 0), case_name);
if (backing_value_zv != NULL) {
ZVAL_COPY(OBJ_PROP_NUM(zobj, 1), backing_value_zv);
}
zobj->handlers = &enum_handlers;
return zobj;
}
static void zend_verify_enum_properties(zend_class_entry *ce)
{
zend_property_info *property_info;
ZEND_HASH_MAP_FOREACH_PTR(&ce->properties_info, property_info) {
if (zend_string_equals_literal(property_info->name, "name")) {
continue;
}
if (
ce->enum_backing_type != IS_UNDEF
&& zend_string_equals_literal(property_info->name, "value")
) {
continue;
}
// FIXME: File/line number for traits?
zend_error_noreturn(E_COMPILE_ERROR, "Enum %s cannot include properties",
ZSTR_VAL(ce->name));
} ZEND_HASH_FOREACH_END();
}
static void zend_verify_enum_magic_methods(zend_class_entry *ce)
{
// Only __get, __call and __invoke are allowed
ZEND_ENUM_DISALLOW_MAGIC_METHOD(constructor, "__construct");
ZEND_ENUM_DISALLOW_MAGIC_METHOD(destructor, "__destruct");
ZEND_ENUM_DISALLOW_MAGIC_METHOD(clone, "__clone");
ZEND_ENUM_DISALLOW_MAGIC_METHOD(__get, "__get");
ZEND_ENUM_DISALLOW_MAGIC_METHOD(__set, "__set");
ZEND_ENUM_DISALLOW_MAGIC_METHOD(__unset, "__unset");
ZEND_ENUM_DISALLOW_MAGIC_METHOD(__isset, "__isset");
ZEND_ENUM_DISALLOW_MAGIC_METHOD(__tostring, "__toString");
ZEND_ENUM_DISALLOW_MAGIC_METHOD(__debugInfo, "__debugInfo");
ZEND_ENUM_DISALLOW_MAGIC_METHOD(__serialize, "__serialize");
ZEND_ENUM_DISALLOW_MAGIC_METHOD(__unserialize, "__unserialize");
const char *forbidden_methods[] = {
"__sleep",
"__wakeup",
"__set_state",
};
uint32_t forbidden_methods_length = sizeof(forbidden_methods) / sizeof(forbidden_methods[0]);
for (uint32_t i = 0; i < forbidden_methods_length; ++i) {
const char *forbidden_method = forbidden_methods[i];
if (zend_hash_str_exists(&ce->function_table, forbidden_method, strlen(forbidden_method))) {
zend_error_noreturn(E_COMPILE_ERROR, "Enum %s cannot include magic method %s", ZSTR_VAL(ce->name), forbidden_method);
}
}
}
static void zend_verify_enum_interfaces(zend_class_entry *ce)
{
if (zend_class_implements_interface(ce, zend_ce_serializable)) {
zend_error_noreturn(E_COMPILE_ERROR,
"Enum %s cannot implement the Serializable interface", ZSTR_VAL(ce->name));
}
}
void zend_verify_enum(zend_class_entry *ce)
{
zend_verify_enum_properties(ce);
zend_verify_enum_magic_methods(ce);
zend_verify_enum_interfaces(ce);
}
static int zend_implement_unit_enum(zend_class_entry *interface, zend_class_entry *class_type)
{
if (class_type->ce_flags & ZEND_ACC_ENUM) {
return SUCCESS;
}
zend_error_noreturn(E_ERROR, "Non-enum class %s cannot implement interface %s",
ZSTR_VAL(class_type->name),
ZSTR_VAL(interface->name));
return FAILURE;
}
static int zend_implement_backed_enum(zend_class_entry *interface, zend_class_entry *class_type)
{
if (!(class_type->ce_flags & ZEND_ACC_ENUM)) {
zend_error_noreturn(E_ERROR, "Non-enum class %s cannot implement interface %s",
ZSTR_VAL(class_type->name),
ZSTR_VAL(interface->name));
return FAILURE;
}
if (class_type->enum_backing_type == IS_UNDEF) {
zend_error_noreturn(E_ERROR, "Non-backed enum %s cannot implement interface %s",
ZSTR_VAL(class_type->name),
ZSTR_VAL(interface->name));
return FAILURE;
}
return SUCCESS;
}
void zend_register_enum_ce(void)
{
zend_ce_unit_enum = register_class_UnitEnum();
zend_ce_unit_enum->interface_gets_implemented = zend_implement_unit_enum;
zend_ce_backed_enum = register_class_BackedEnum(zend_ce_unit_enum);
zend_ce_backed_enum->interface_gets_implemented = zend_implement_backed_enum;
memcpy(&enum_handlers, &std_object_handlers, sizeof(zend_object_handlers));
enum_handlers.clone_obj = NULL;
enum_handlers.compare = zend_objects_not_comparable;
}
void zend_enum_add_interfaces(zend_class_entry *ce)
{
uint32_t num_interfaces_before = ce->num_interfaces;
ce->num_interfaces++;
if (ce->enum_backing_type != IS_UNDEF) {
ce->num_interfaces++;
}
ZEND_ASSERT(!(ce->ce_flags & ZEND_ACC_RESOLVED_INTERFACES));
ce->interface_names = erealloc(ce->interface_names, sizeof(zend_class_name) * ce->num_interfaces);
ce->interface_names[num_interfaces_before].name = zend_string_copy(zend_ce_unit_enum->name);
ce->interface_names[num_interfaces_before].lc_name = zend_string_init("unitenum", sizeof("unitenum") - 1, 0);
if (ce->enum_backing_type != IS_UNDEF) {
ce->interface_names[num_interfaces_before + 1].name = zend_string_copy(zend_ce_backed_enum->name);
ce->interface_names[num_interfaces_before + 1].lc_name = zend_string_init("backedenum", sizeof("backedenum") - 1, 0);
}
}
zend_result zend_enum_build_backed_enum_table(zend_class_entry *ce)
{
ZEND_ASSERT(ce->ce_flags & ZEND_ACC_ENUM);
ZEND_ASSERT(ce->type == ZEND_USER_CLASS);
uint32_t backing_type = ce->enum_backing_type;
ZEND_ASSERT(backing_type != IS_UNDEF);
HashTable *backed_enum_table = emalloc(sizeof(HashTable));
zend_hash_init(backed_enum_table, 0, NULL, ZVAL_PTR_DTOR, 0);
zend_class_set_backed_enum_table(ce, backed_enum_table);
zend_string *enum_class_name = ce->name;
zend_string *name;
zval *val;
ZEND_HASH_MAP_FOREACH_STR_KEY_VAL(CE_CONSTANTS_TABLE(ce), name, val) {
zend_class_constant *c = Z_PTR_P(val);
if ((ZEND_CLASS_CONST_FLAGS(c) & ZEND_CLASS_CONST_IS_CASE) == 0) {
continue;
}
zval *c_value = &c->value;
zval *case_name = zend_enum_fetch_case_name(Z_OBJ_P(c_value));
zval *case_value = zend_enum_fetch_case_value(Z_OBJ_P(c_value));
if (ce->enum_backing_type != Z_TYPE_P(case_value)) {
zend_type_error("Enum case type %s does not match enum backing type %s",
zend_get_type_by_const(Z_TYPE_P(case_value)),
zend_get_type_by_const(ce->enum_backing_type));
goto failure;
}
if (ce->enum_backing_type == IS_LONG) {
zend_long long_key = Z_LVAL_P(case_value);
zval *existing_case_name = zend_hash_index_find(backed_enum_table, long_key);
if (existing_case_name) {
zend_throw_error(NULL, "Duplicate value in enum %s for cases %s and %s",
ZSTR_VAL(enum_class_name),
Z_STRVAL_P(existing_case_name),
ZSTR_VAL(name));
goto failure;
}
Z_TRY_ADDREF_P(case_name);
zend_hash_index_add_new(backed_enum_table, long_key, case_name);
} else {
ZEND_ASSERT(ce->enum_backing_type == IS_STRING);
zend_string *string_key = Z_STR_P(case_value);
zval *existing_case_name = zend_hash_find(backed_enum_table, string_key);
if (existing_case_name != NULL) {
zend_throw_error(NULL, "Duplicate value in enum %s for cases %s and %s",
ZSTR_VAL(enum_class_name),
Z_STRVAL_P(existing_case_name),
ZSTR_VAL(name));
goto failure;
}
Z_TRY_ADDREF_P(case_name);
zend_hash_add_new(backed_enum_table, string_key, case_name);
}
} ZEND_HASH_FOREACH_END();
return SUCCESS;
failure:
zend_hash_release(backed_enum_table);
zend_class_set_backed_enum_table(ce, NULL);
return FAILURE;
}
static ZEND_NAMED_FUNCTION(zend_enum_cases_func)
{
zend_class_entry *ce = execute_data->func->common.scope;
zend_class_constant *c;
ZEND_PARSE_PARAMETERS_NONE();
array_init(return_value);
ZEND_HASH_MAP_FOREACH_PTR(CE_CONSTANTS_TABLE(ce), c) {
if (!(ZEND_CLASS_CONST_FLAGS(c) & ZEND_CLASS_CONST_IS_CASE)) {
continue;
}
zval *zv = &c->value;
if (Z_TYPE_P(zv) == IS_CONSTANT_AST) {
if (zval_update_constant_ex(zv, c->ce) == FAILURE) {
RETURN_THROWS();
}
}
Z_ADDREF_P(zv);
zend_hash_next_index_insert_new(Z_ARRVAL_P(return_value), zv);
} ZEND_HASH_FOREACH_END();
}
ZEND_API zend_result zend_enum_get_case_by_value(zend_object **result, zend_class_entry *ce, zend_long long_key, zend_string *string_key, bool try)
{
if (ce->type == ZEND_USER_CLASS && !(ce->ce_flags & ZEND_ACC_CONSTANTS_UPDATED)) {
if (zend_update_class_constants(ce) == FAILURE) {
return FAILURE;
}
}
HashTable *backed_enum_table = CE_BACKED_ENUM_TABLE(ce);
if (!backed_enum_table) {
goto not_found;
}
zval *case_name_zv;
if (ce->enum_backing_type == IS_LONG) {
case_name_zv = zend_hash_index_find(backed_enum_table, long_key);
} else {
ZEND_ASSERT(ce->enum_backing_type == IS_STRING);
ZEND_ASSERT(string_key != NULL);
case_name_zv = zend_hash_find(backed_enum_table, string_key);
}
if (case_name_zv == NULL) {
not_found:
if (try) {
*result = NULL;
return SUCCESS;
}
if (ce->enum_backing_type == IS_LONG) {
zend_value_error(ZEND_LONG_FMT " is not a valid backing value for enum %s", long_key, ZSTR_VAL(ce->name));
} else {
ZEND_ASSERT(ce->enum_backing_type == IS_STRING);
zend_value_error("\"%s\" is not a valid backing value for enum %s", ZSTR_VAL(string_key), ZSTR_VAL(ce->name));
}
return FAILURE;
}
// TODO: We might want to store pointers to constants in backed_enum_table instead of names,
// to make this lookup more efficient.
ZEND_ASSERT(Z_TYPE_P(case_name_zv) == IS_STRING);
zend_class_constant *c = zend_hash_find_ptr(CE_CONSTANTS_TABLE(ce), Z_STR_P(case_name_zv));
ZEND_ASSERT(c != NULL);
zval *case_zv = &c->value;
if (Z_TYPE_P(case_zv) == IS_CONSTANT_AST) {
if (zval_update_constant_ex(case_zv, c->ce) == FAILURE) {
return FAILURE;
}
}
*result = Z_OBJ_P(case_zv);
return SUCCESS;
}
static void zend_enum_from_base(INTERNAL_FUNCTION_PARAMETERS, bool try)
{
zend_class_entry *ce = execute_data->func->common.scope;
bool release_string = false;
zend_string *string_key = NULL;
zend_long long_key = 0;
if (ce->enum_backing_type == IS_LONG) {
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_LONG(long_key)
ZEND_PARSE_PARAMETERS_END();
} else {
ZEND_ASSERT(ce->enum_backing_type == IS_STRING);
if (ZEND_ARG_USES_STRICT_TYPES()) {
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_STR(string_key)
ZEND_PARSE_PARAMETERS_END();
} else {
// We allow long keys so that coercion to string doesn't happen implicitly. The JIT
// skips deallocation of params that don't require it. In the case of from/tryFrom
// passing int to from(int|string) looks like no coercion will happen, so the JIT
// won't emit a dtor call. Thus we allocate/free the string manually.
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_STR_OR_LONG(string_key, long_key)
ZEND_PARSE_PARAMETERS_END();
if (string_key == NULL) {
release_string = true;
string_key = zend_long_to_str(long_key);
}
}
}
zend_object *case_obj;
if (zend_enum_get_case_by_value(&case_obj, ce, long_key, string_key, try) == FAILURE) {
goto throw;
}
if (case_obj == NULL) {
ZEND_ASSERT(try);
goto return_null;
}
if (release_string) {
zend_string_release(string_key);
}
RETURN_OBJ_COPY(case_obj);
throw:
if (release_string) {
zend_string_release(string_key);
}
RETURN_THROWS();
return_null:
if (release_string) {
zend_string_release(string_key);
}
RETURN_NULL();
}
static ZEND_NAMED_FUNCTION(zend_enum_from_func)
{
zend_enum_from_base(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0);
}
static ZEND_NAMED_FUNCTION(zend_enum_try_from_func)
{
zend_enum_from_base(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1);
}
static void zend_enum_register_func(zend_class_entry *ce, zend_known_string_id name_id, zend_internal_function *zif) {
zend_string *name = ZSTR_KNOWN(name_id);
zif->type = ZEND_INTERNAL_FUNCTION;
zif->module = EG(current_module);
zif->scope = ce;
zif->T = ZEND_OBSERVER_ENABLED;
if (EG(active)) { // at run-time
ZEND_MAP_PTR_INIT(zif->run_time_cache, zend_arena_calloc(&CG(arena), 1, zend_internal_run_time_cache_reserved_size()));
} else {
ZEND_MAP_PTR_NEW(zif->run_time_cache);
}
if (!zend_hash_add_ptr(&ce->function_table, name, zif)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot redeclare %s::%s()", ZSTR_VAL(ce->name), ZSTR_VAL(name));
}
}
void zend_enum_register_funcs(zend_class_entry *ce)
{
const uint32_t fn_flags =
ZEND_ACC_PUBLIC|ZEND_ACC_STATIC|ZEND_ACC_HAS_RETURN_TYPE|ZEND_ACC_ARENA_ALLOCATED;
zend_internal_function *cases_function = zend_arena_calloc(&CG(arena), sizeof(zend_internal_function), 1);
cases_function->handler = zend_enum_cases_func;
cases_function->function_name = ZSTR_KNOWN(ZEND_STR_CASES);
cases_function->fn_flags = fn_flags;
cases_function->arg_info = (zend_internal_arg_info *) (arginfo_class_UnitEnum_cases + 1);
zend_enum_register_func(ce, ZEND_STR_CASES, cases_function);
if (ce->enum_backing_type != IS_UNDEF) {
zend_internal_function *from_function = zend_arena_calloc(&CG(arena), sizeof(zend_internal_function), 1);
from_function->handler = zend_enum_from_func;
from_function->function_name = ZSTR_KNOWN(ZEND_STR_FROM);
from_function->fn_flags = fn_flags;
from_function->num_args = 1;
from_function->required_num_args = 1;
from_function->arg_info = (zend_internal_arg_info *) (arginfo_class_BackedEnum_from + 1);
zend_enum_register_func(ce, ZEND_STR_FROM, from_function);
zend_internal_function *try_from_function = zend_arena_calloc(&CG(arena), sizeof(zend_internal_function), 1);
try_from_function->handler = zend_enum_try_from_func;
try_from_function->function_name = ZSTR_KNOWN(ZEND_STR_TRYFROM);
try_from_function->fn_flags = fn_flags;
try_from_function->num_args = 1;
try_from_function->required_num_args = 1;
try_from_function->arg_info = (zend_internal_arg_info *) (arginfo_class_BackedEnum_tryFrom + 1);
zend_enum_register_func(ce, ZEND_STR_TRYFROM_LOWERCASE, try_from_function);
}
}
void zend_enum_register_props(zend_class_entry *ce)
{
ce->ce_flags |= ZEND_ACC_NO_DYNAMIC_PROPERTIES;
zval name_default_value;
ZVAL_UNDEF(&name_default_value);
zend_type name_type = ZEND_TYPE_INIT_CODE(IS_STRING, 0, 0);
zend_declare_typed_property(ce, ZSTR_KNOWN(ZEND_STR_NAME), &name_default_value, ZEND_ACC_PUBLIC | ZEND_ACC_READONLY, NULL, name_type);
if (ce->enum_backing_type != IS_UNDEF) {
zval value_default_value;
ZVAL_UNDEF(&value_default_value);
zend_type value_type = ZEND_TYPE_INIT_CODE(ce->enum_backing_type, 0, 0);
zend_declare_typed_property(ce, ZSTR_KNOWN(ZEND_STR_VALUE), &value_default_value, ZEND_ACC_PUBLIC | ZEND_ACC_READONLY, NULL, value_type);
}
}
static const zend_function_entry unit_enum_methods[] = {
ZEND_NAMED_ME(cases, zend_enum_cases_func, arginfo_class_UnitEnum_cases, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
ZEND_FE_END
};
static const zend_function_entry backed_enum_methods[] = {
ZEND_NAMED_ME(cases, zend_enum_cases_func, arginfo_class_UnitEnum_cases, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
ZEND_NAMED_ME(from, zend_enum_from_func, arginfo_class_BackedEnum_from, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
ZEND_NAMED_ME(tryFrom, zend_enum_try_from_func, arginfo_class_BackedEnum_tryFrom, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
ZEND_FE_END
};
ZEND_API zend_class_entry *zend_register_internal_enum(
const char *name, zend_uchar type, const zend_function_entry *functions)
{
ZEND_ASSERT(type == IS_UNDEF || type == IS_LONG || type == IS_STRING);
zend_class_entry tmp_ce;
INIT_CLASS_ENTRY_EX(tmp_ce, name, strlen(name), functions);
zend_class_entry *ce = zend_register_internal_class(&tmp_ce);
ce->ce_flags |= ZEND_ACC_ENUM;
ce->enum_backing_type = type;
if (type != IS_UNDEF) {
HashTable *backed_enum_table = pemalloc(sizeof(HashTable), 1);
zend_hash_init(backed_enum_table, 0, NULL, ZVAL_PTR_DTOR, 1);
zend_class_set_backed_enum_table(ce, backed_enum_table);
}
zend_enum_register_props(ce);
if (type == IS_UNDEF) {
zend_register_functions(
ce, unit_enum_methods, &ce->function_table, EG(current_module)->type);
zend_class_implements(ce, 1, zend_ce_unit_enum);
} else {
zend_register_functions(
ce, backed_enum_methods, &ce->function_table, EG(current_module)->type);
zend_class_implements(ce, 1, zend_ce_backed_enum);
}
return ce;
}
static zend_ast_ref *create_enum_case_ast(
zend_string *class_name, zend_string *case_name, zval *value) {
// TODO: Use custom node type for enum cases?
size_t size = sizeof(zend_ast_ref) + zend_ast_size(3)
+ (value ? 3 : 2) * sizeof(zend_ast_zval);
char *p = pemalloc(size, 1);
zend_ast_ref *ref = (zend_ast_ref *) p; p += sizeof(zend_ast_ref);
GC_SET_REFCOUNT(ref, 1);
GC_TYPE_INFO(ref) = GC_CONSTANT_AST | GC_PERSISTENT | GC_IMMUTABLE;
zend_ast *ast = (zend_ast *) p; p += zend_ast_size(3);
ast->kind = ZEND_AST_CONST_ENUM_INIT;
ast->attr = 0;
ast->lineno = 0;
ast->child[0] = (zend_ast *) p; p += sizeof(zend_ast_zval);
ast->child[0]->kind = ZEND_AST_ZVAL;
ast->child[0]->attr = 0;
ZEND_ASSERT(ZSTR_IS_INTERNED(class_name));
ZVAL_STR(zend_ast_get_zval(ast->child[0]), class_name);
ast->child[1] = (zend_ast *) p; p += sizeof(zend_ast_zval);
ast->child[1]->kind = ZEND_AST_ZVAL;
ast->child[1]->attr = 0;
ZEND_ASSERT(ZSTR_IS_INTERNED(case_name));
ZVAL_STR(zend_ast_get_zval(ast->child[1]), case_name);
if (value) {
ast->child[2] = (zend_ast *) p; p += sizeof(zend_ast_zval);
ast->child[2]->kind = ZEND_AST_ZVAL;
ast->child[2]->attr = 0;
ZEND_ASSERT(!Z_REFCOUNTED_P(value));
ZVAL_COPY_VALUE(zend_ast_get_zval(ast->child[2]), value);
} else {
ast->child[2] = NULL;
}
return ref;
}
ZEND_API void zend_enum_add_case(zend_class_entry *ce, zend_string *case_name, zval *value)
{
if (value) {
ZEND_ASSERT(ce->enum_backing_type == Z_TYPE_P(value));
if (Z_TYPE_P(value) == IS_STRING && !ZSTR_IS_INTERNED(Z_STR_P(value))) {
zval_make_interned_string(value);
}
HashTable *backed_enum_table = CE_BACKED_ENUM_TABLE(ce);
zval case_name_zv;
ZVAL_STR(&case_name_zv, case_name);
if (Z_TYPE_P(value) == IS_LONG) {
zend_hash_index_add_new(backed_enum_table, Z_LVAL_P(value), &case_name_zv);
} else {
zend_hash_add_new(backed_enum_table, Z_STR_P(value), &case_name_zv);
}
} else {
ZEND_ASSERT(ce->enum_backing_type == IS_UNDEF);
}
zval ast_zv;
Z_TYPE_INFO(ast_zv) = IS_CONSTANT_AST;
Z_AST(ast_zv) = create_enum_case_ast(ce->name, case_name, value);
zend_class_constant *c = zend_declare_class_constant_ex(
ce, case_name, &ast_zv, ZEND_ACC_PUBLIC, NULL);
ZEND_CLASS_CONST_FLAGS(c) |= ZEND_CLASS_CONST_IS_CASE;
}
ZEND_API void zend_enum_add_case_cstr(zend_class_entry *ce, const char *name, zval *value)
{
zend_string *name_str = zend_string_init_interned(name, strlen(name), 1);
zend_enum_add_case(ce, name_str, value);
zend_string_release(name_str);
}
ZEND_API zend_object *zend_enum_get_case(zend_class_entry *ce, zend_string *name) {
zend_class_constant *c = zend_hash_find_ptr(CE_CONSTANTS_TABLE(ce), name);
ZEND_ASSERT(ZEND_CLASS_CONST_FLAGS(c) & ZEND_CLASS_CONST_IS_CASE);
if (Z_TYPE(c->value) == IS_CONSTANT_AST) {
if (zval_update_constant_ex(&c->value, c->ce) == FAILURE) {
ZEND_UNREACHABLE();
}
}
ZEND_ASSERT(Z_TYPE(c->value) == IS_OBJECT);
return Z_OBJ(c->value);
}
ZEND_API zend_object *zend_enum_get_case_cstr(zend_class_entry *ce, const char *name) {
zend_string *name_str = zend_string_init(name, strlen(name), 0);
zend_object *result = zend_enum_get_case(ce, name_str);
zend_string_release(name_str);
return result;
}