php-src/Zend/zend_vm_execute.skl

{%DEFINES%}

#if (ZEND_VM_KIND != ZEND_VM_KIND_CALL) && (ZEND_GCC_VERSION >= 4000) && !defined(__clang__)
# pragma GCC push_options
# pragma GCC optimize("no-gcse")
# pragma GCC optimize("no-ivopts")
#endif
ZEND_API void {%EXECUTOR_NAME%}_ex(zend_execute_data *ex)
{
	DCL_OPLINE

	{%HELPER_VARS%}

	{%INTERNAL_LABELS%}

#if (ZEND_VM_KIND == ZEND_VM_KIND_HYBRID)
	/* Force C compiler to store preserved registers to allow JIT using them */
# if defined(__GNUC__) && defined(__i386__)
	__asm__ __volatile__ (""::: "ebx");
# elif defined(__GNUC__) && defined(__x86_64__)
	__asm__ __volatile__ (""::: "rbx","r12","r13");
# elif defined(__GNUC__) && defined(__aarch64__)
	__asm__ __volatile__ (""::: "x19","x20","x21","x22","x23","x24","x25","x26");
# endif
#endif
	LOAD_OPLINE();
	ZEND_VM_LOOP_INTERRUPT_CHECK();

#ifdef ZEND_CHECK_STACK_LIMIT
	if (UNEXPECTED(zend_call_stack_overflowed(EG(stack_limit)))) {
		zend_call_stack_size_error();
		/* No opline was executed before exception */
		EG(opline_before_exception) = NULL;
		LOAD_OPLINE();
		/* Fall through to handle exception below. */
	}
#endif /* ZEND_CHECK_STACK_LIMIT */

	while (1) {
		{%ZEND_VM_CONTINUE_LABEL%}
		{%ZEND_VM_DISPATCH%} {
			{%INTERNAL_EXECUTOR%}
		}

	}
	zend_error_noreturn(E_CORE_ERROR, "Arrived at end of main loop which shouldn't happen");
}
#if (ZEND_VM_KIND != ZEND_VM_KIND_CALL) && (ZEND_GCC_VERSION >= 4000) && !defined(__clang__)
# pragma GCC pop_options
#endif

ZEND_API void zend_{%EXECUTOR_NAME%}(zend_op_array *op_array, zval *return_value)
{
	zend_execute_data *execute_data;
	void *object_or_called_scope;
	uint32_t call_info;

	if (EG(exception) != NULL) {
		return;
	}

	object_or_called_scope = zend_get_this_object(EG(current_execute_data));
	if (EXPECTED(!object_or_called_scope)) {
		object_or_called_scope = zend_get_called_scope(EG(current_execute_data));
		call_info = ZEND_CALL_TOP_CODE | ZEND_CALL_HAS_SYMBOL_TABLE;
	} else {
		call_info = ZEND_CALL_TOP_CODE | ZEND_CALL_HAS_SYMBOL_TABLE | ZEND_CALL_HAS_THIS;
	}
	execute_data = zend_vm_stack_push_call_frame(call_info,
		(zend_function*)op_array, 0, object_or_called_scope);
	if (EG(current_execute_data)) {
		execute_data->symbol_table = zend_rebuild_symbol_table();
	} else {
		execute_data->symbol_table = &EG(symbol_table);
	}
	EX(prev_execute_data) = EG(current_execute_data);
	i_init_code_execute_data(execute_data, op_array, return_value);
	ZEND_OBSERVER_FCALL_BEGIN(execute_data);
	zend_{%EXECUTOR_NAME%}_ex(execute_data);
	/* Observer end handlers are called from ZEND_RETURN */
	zend_vm_stack_free_call_frame(execute_data);
}

{%EXTERNAL_EXECUTOR%}

void {%INITIALIZER_NAME%}(void)
{
	{%EXTERNAL_LABELS%}
	VM_TRACE_START();
}

static HashTable *zend_handlers_table = NULL;

void zend_vm_dtor(void)
{
	VM_TRACE_END();
	if (zend_handlers_table) {
		zend_hash_destroy(zend_handlers_table);
		free(zend_handlers_table);
		zend_handlers_table = NULL;
	}
}

static void init_opcode_serialiser(void)
{
	int i;
	zval tmp;

	zend_handlers_table = malloc(sizeof(HashTable));
	zend_hash_init(zend_handlers_table, zend_handlers_count, NULL, NULL, 1);
	zend_hash_real_init(zend_handlers_table, 0);
	Z_TYPE_INFO(tmp) = IS_LONG;
	for (i = 0; i < zend_handlers_count; i++) {
		Z_LVAL(tmp) = i;
		zend_hash_index_add(zend_handlers_table, (zend_long)(uintptr_t)zend_opcode_handlers[i], &tmp);
	}
}

ZEND_API void ZEND_FASTCALL zend_serialize_opcode_handler(zend_op *op)
{
	zval *zv;

	if (!zend_handlers_table) {
		init_opcode_serialiser();
	}
	zv = zend_hash_index_find(zend_handlers_table, (zend_long)(uintptr_t)op->handler);
	ZEND_ASSERT(zv != NULL);
	op->handler = (const void *)(uintptr_t)Z_LVAL_P(zv);
}

ZEND_API void ZEND_FASTCALL zend_deserialize_opcode_handler(zend_op *op)
{
	op->handler = zend_opcode_handlers[(uintptr_t)op->handler];
}

ZEND_API const void* ZEND_FASTCALL zend_get_opcode_handler_func(const zend_op *op)
{
#if ZEND_VM_KIND == ZEND_VM_KIND_CALL
	return op->handler;
#elif ZEND_VM_KIND == ZEND_VM_KIND_HYBRID
	zval *zv;

	if (!zend_handlers_table) {
		init_opcode_serialiser();
	}
	zv = zend_hash_index_find(zend_handlers_table, (zend_long)(uintptr_t)op->handler);
	ZEND_ASSERT(zv != NULL);
	return zend_opcode_handler_funcs[Z_LVAL_P(zv)];
#else
	return NULL;
#endif
}

ZEND_API const zend_op *zend_get_halt_op(void)
{
#if ZEND_VM_KIND == ZEND_VM_KIND_HYBRID
	return &hybrid_halt_op;
#else
	return NULL;
#endif
}

ZEND_API int zend_vm_kind(void)
{
	return ZEND_VM_KIND;
}