/** * 'Try' opcode handler. * * See also: ECMA-262 v5, 12.14 * * @return completion value * Returned value must be freed with ecma_free_completion_value */ ecma_completion_value_t opfunc_try_block (vm_instr_t instr, /**< instruction */ vm_frame_ctx_t *frame_ctx_p) /**< interpreter context */ { const vm_idx_t block_end_oc_idx_1 = instr.data.try_block.oc_idx_1; const vm_idx_t block_end_oc_idx_2 = instr.data.try_block.oc_idx_2; const vm_instr_counter_t try_end_oc = (vm_instr_counter_t) ( vm_calc_instr_counter_from_idx_idx (block_end_oc_idx_1, block_end_oc_idx_2) + frame_ctx_p->pos); frame_ctx_p->pos++; vm_run_scope_t run_scope_try = { frame_ctx_p->pos, try_end_oc }; ecma_completion_value_t try_completion = vm_loop (frame_ctx_p, &run_scope_try); JERRY_ASSERT ((!ecma_is_completion_value_empty (try_completion) && frame_ctx_p->pos <= try_end_oc) || (ecma_is_completion_value_empty (try_completion) && frame_ctx_p->pos == try_end_oc)); frame_ctx_p->pos = try_end_oc; vm_instr_t next_instr = vm_get_instr (frame_ctx_p->bytecode_header_p->instrs_p, frame_ctx_p->pos); JERRY_ASSERT (next_instr.op_idx == VM_OP_META); if (next_instr.data.meta.type == OPCODE_META_TYPE_CATCH) { const vm_instr_counter_t catch_end_oc = (vm_instr_counter_t) ( vm_read_instr_counter_from_meta (OPCODE_META_TYPE_CATCH, frame_ctx_p) + frame_ctx_p->pos); frame_ctx_p->pos++; if (ecma_is_completion_value_throw (try_completion)) { next_instr = vm_get_instr (frame_ctx_p->bytecode_header_p->instrs_p, frame_ctx_p->pos); JERRY_ASSERT (next_instr.op_idx == VM_OP_META); JERRY_ASSERT (next_instr.data.meta.type == OPCODE_META_TYPE_CATCH_EXCEPTION_IDENTIFIER); lit_cpointer_t catch_exc_val_var_name_lit_cp = serializer_get_literal_cp_by_uid (next_instr.data.meta.data_1, frame_ctx_p->bytecode_header_p, frame_ctx_p->pos); frame_ctx_p->pos++; ecma_string_t *catch_exc_var_name_str_p = ecma_new_ecma_string_from_lit_cp (catch_exc_val_var_name_lit_cp); ecma_object_t *old_env_p = frame_ctx_p->lex_env_p; ecma_object_t *catch_env_p = ecma_create_decl_lex_env (old_env_p); ecma_completion_value_t completion = ecma_op_create_mutable_binding (catch_env_p, catch_exc_var_name_str_p, false); JERRY_ASSERT (ecma_is_completion_value_empty (completion)); completion = ecma_op_set_mutable_binding (catch_env_p, catch_exc_var_name_str_p, ecma_get_completion_value_value (try_completion), false); JERRY_ASSERT (ecma_is_completion_value_empty (completion)); ecma_deref_ecma_string (catch_exc_var_name_str_p); frame_ctx_p->lex_env_p = catch_env_p; ecma_free_completion_value (try_completion); vm_run_scope_t run_scope_catch = { frame_ctx_p->pos, catch_end_oc }; try_completion = vm_loop (frame_ctx_p, &run_scope_catch); frame_ctx_p->lex_env_p = old_env_p; ecma_deref_object (catch_env_p); JERRY_ASSERT ((!ecma_is_completion_value_empty (try_completion) && frame_ctx_p->pos <= catch_end_oc) || (ecma_is_completion_value_empty (try_completion) && frame_ctx_p->pos == catch_end_oc)); } frame_ctx_p->pos = catch_end_oc; } next_instr = vm_get_instr (frame_ctx_p->bytecode_header_p->instrs_p, frame_ctx_p->pos); JERRY_ASSERT (next_instr.op_idx == VM_OP_META); if (next_instr.data.meta.type == OPCODE_META_TYPE_FINALLY) { const vm_instr_counter_t finally_end_oc = (vm_instr_counter_t) ( vm_read_instr_counter_from_meta (OPCODE_META_TYPE_FINALLY, frame_ctx_p) + frame_ctx_p->pos); frame_ctx_p->pos++; vm_run_scope_t run_scope_finally = { frame_ctx_p->pos, finally_end_oc }; ecma_completion_value_t finally_completion = vm_loop (frame_ctx_p, &run_scope_finally); JERRY_ASSERT ((!ecma_is_completion_value_empty (finally_completion) && frame_ctx_p->pos <= finally_end_oc) || (ecma_is_completion_value_empty (finally_completion) && frame_ctx_p->pos == finally_end_oc)); frame_ctx_p->pos = finally_end_oc; if (!ecma_is_completion_value_empty (finally_completion)) { ecma_free_completion_value (try_completion); try_completion = finally_completion; } } next_instr = vm_get_instr (frame_ctx_p->bytecode_header_p->instrs_p, frame_ctx_p->pos++); JERRY_ASSERT (next_instr.op_idx == VM_OP_META); JERRY_ASSERT (next_instr.data.meta.type == OPCODE_META_TYPE_END_TRY_CATCH_FINALLY); return try_completion; } /* opfunc_try_block */
/** * 'for-in' opcode handler * * See also: * ECMA-262 v5, 12.6.4 * * @return completion value * Returned value must be freed with ecma_free_completion_value */ ecma_completion_value_t opfunc_for_in (vm_instr_t instr, /**< instruction */ vm_frame_ctx_t *int_data_p) /**< interpreter context */ { const idx_t expr_idx = instr.data.for_in.expr; const idx_t block_end_oc_idx_1 = instr.data.for_in.oc_idx_1; const idx_t block_end_oc_idx_2 = instr.data.for_in.oc_idx_2; const vm_instr_counter_t for_in_end_oc = (vm_instr_counter_t) ( vm_calc_instr_counter_from_idx_idx (block_end_oc_idx_1, block_end_oc_idx_2) + int_data_p->pos); ecma_completion_value_t ret_value = ecma_make_empty_completion_value (); /* 1., 2. */ ECMA_TRY_CATCH (expr_value, get_variable_value (int_data_p, expr_idx, false), ret_value); int_data_p->pos++; vm_instr_t meta_instr = vm_get_instr (int_data_p->instrs_p, for_in_end_oc); JERRY_ASSERT (meta_instr.op_idx == VM_OP_META); JERRY_ASSERT (meta_instr.data.meta.type == OPCODE_META_TYPE_END_FOR_IN); /* 3. */ if (!ecma_is_value_undefined (expr_value) && !ecma_is_value_null (expr_value)) { /* 4. */ ECMA_TRY_CATCH (obj_expr_value, ecma_op_to_object (expr_value), ret_value); ecma_object_t *obj_p = ecma_get_object_from_value (obj_expr_value); ecma_collection_iterator_t names_iterator; ecma_collection_header_t *names_p = vm_helper_for_in_enumerate_properties_names (obj_p); if (names_p != NULL) { ecma_collection_iterator_init (&names_iterator, names_p); const vm_instr_counter_t for_in_body_begin_oc = int_data_p->pos; const vm_instr_counter_t for_in_body_end_oc = for_in_end_oc; while (ecma_collection_iterator_next (&names_iterator)) { ecma_value_t name_value = *names_iterator.current_value_p; ecma_string_t *name_p = ecma_get_string_from_value (name_value); if (ecma_op_object_get_property (obj_p, name_p) != NULL) { ecma_completion_value_t completion = set_variable_value (int_data_p, int_data_p->pos, OPCODE_REG_SPECIAL_FOR_IN_PROPERTY_NAME, name_value); JERRY_ASSERT (ecma_is_completion_value_empty (completion)); vm_run_scope_t run_scope_for_in = { for_in_body_begin_oc, for_in_body_end_oc }; ecma_completion_value_t for_in_body_completion = vm_loop (int_data_p, &run_scope_for_in); if (ecma_is_completion_value_empty (for_in_body_completion)) { JERRY_ASSERT (int_data_p->pos == for_in_body_end_oc); int_data_p->pos = for_in_body_begin_oc; } else { JERRY_ASSERT (ecma_is_completion_value_throw (for_in_body_completion) || ecma_is_completion_value_return (for_in_body_completion) || ecma_is_completion_value_jump (for_in_body_completion)); JERRY_ASSERT (int_data_p->pos <= for_in_body_end_oc); ret_value = for_in_body_completion; break; } } } ecma_free_values_collection (names_p, true); } ECMA_FINALIZE (obj_expr_value); } int_data_p->pos = (vm_instr_counter_t) (for_in_end_oc + 1u); ECMA_FINALIZE (expr_value); return ret_value; } /* opfunc_for_in */