void dispatch_virtual (Object *ref, int signature, byte *retAddr) { ClassRecord *classRecord; MethodRecord *methodRecord; int classIndex; #if DEBUG_METHODS printf("dispatch_virtual %d\n", signature); #endif if (ref == JNULL) { throw_new_exception (JAVA_LANG_NULLPOINTEREXCEPTION); return; } // When calling methods on arrays, we use the methods for the Object class... classIndex = get_class_index(ref); LABEL_METHODLOOKUP: classRecord = get_class_record (classIndex); methodRecord = find_method (classRecord, signature); if (methodRecord == null) { #if SAFE if (classIndex == JAVA_LANG_OBJECT) { throw_new_exception (JAVA_LANG_NOSUCHMETHODERROR); return; } #endif classIndex = classRecord->parentClass; goto LABEL_METHODLOOKUP; } if (dispatch_special (methodRecord, retAddr)) { if (is_synchronized(methodRecord)) { current_stackframe()->monitor = ref; enter_monitor (currentThread, ref); } } }
/** * NOTE: The technique is not the same as that used in TinyVM. * The return value indicates the impact of the call on the VM * system. EXEC_CONTINUE normal return the system should return to the return * address provided by the VM. EXEC_RUN The call has modified the value of * VM PC and this should be used to restart execution. EXEC_RETRY The call * needs to be re-tried (typically for a GC failure), all global state * should be left intact, the PC has been set appropriately. * */ int dispatch_native(TWOBYTES signature, STACKWORD * paramBase) { STACKWORD p0 = paramBase[0]; switch (signature) { case wait_4_5V: return monitor_wait((Object *) word2ptr(p0), 0); case wait_4J_5V: return monitor_wait((Object *) word2ptr(p0), ((int)paramBase[1] > 0 ? 0x7fffffff : paramBase[2])); case notify_4_5V: return monitor_notify((Object *) word2ptr(p0), false); case notifyAll_4_5V: return monitor_notify((Object *) word2ptr(p0), true); case start_4_5V: // Create thread, allow for instruction restart return init_thread((Thread *) word2ptr(p0)); case yield_4_5V: schedule_request(REQUEST_SWITCH_THREAD); break; case sleep_4J_5V: sleep_thread(((int)p0 > 0 ? 0x7fffffff : paramBase[1])); schedule_request(REQUEST_SWITCH_THREAD); break; case getPriority_4_5I: push_word(get_thread_priority((Thread *) word2ptr(p0))); break; case setPriority_4I_5V: { STACKWORD p = (STACKWORD) paramBase[1]; if (p > MAX_PRIORITY || p < MIN_PRIORITY) return throw_new_exception(JAVA_LANG_ILLEGALARGUMENTEXCEPTION); else set_thread_priority((Thread *) word2ptr(p0), p); } break; case currentThread_4_5Ljava_3lang_3Thread_2: push_ref(ptr2ref(currentThread)); break; case interrupt_4_5V: interrupt_thread((Thread *) word2ptr(p0)); break; case interrupted_4_5Z: { JBYTE i = currentThread->interruptState != INTERRUPT_CLEARED; currentThread->interruptState = INTERRUPT_CLEARED; push_word(i); } break; case isInterrupted_4_5Z: push_word(((Thread *) word2ptr(p0))->interruptState != INTERRUPT_CLEARED); break; case join_4_5V: join_thread((Thread *) word2ptr(p0), 0); break; case join_4J_5V: join_thread((Thread *) word2obj(p0), paramBase[2]); break; case halt_4I_5V: schedule_request(REQUEST_EXIT); break; case shutdown_4_5V: shutdown_program(false); break; case currentTimeMillis_4_5J: push_word(0); push_word(systick_get_ms()); break; case readSensorValue_4I_5I: push_word(sp_read(p0, SP_ANA)); break; case setPowerTypeById_4II_5V: sp_set_power(p0, paramBase[1]); break; case freeMemory_4_5J: push_word(0); push_word(getHeapFree()); break; case totalMemory_4_5J: push_word(0); push_word(getHeapSize()); break; case floatToRawIntBits_4F_5I: // Fall through case intBitsToFloat_4I_5F: push_word(p0); break; case doubleToRawLongBits_4D_5J: // Fall through case longBitsToDouble_4J_5D: push_word(p0); push_word(paramBase[1]); break; case drawString_4Ljava_3lang_3String_2II_5V: { String *p = (String *)word2obj(p0); Object *charArray; if (!p) return throw_new_exception(JAVA_LANG_NULLPOINTEREXCEPTION); charArray = (Object *) word2ptr(get_word_4_ns(fields_start(p))); if (!charArray) return throw_new_exception(JAVA_LANG_NULLPOINTEREXCEPTION); display_goto_xy(paramBase[1], paramBase[2]); display_jstring(p); } break; case drawInt_4III_5V: display_goto_xy(paramBase[1], paramBase[2]); display_int(p0, 0); break; case drawInt_4IIII_5V: display_goto_xy(paramBase[2], paramBase[3]); display_int(p0, paramBase[1]); break; case asyncRefresh_4_5V: display_update(); break; case clear_4_5V: display_clear(0); break; case getDisplay_4_5_1B: push_word(display_get_array()); break; case setAutoRefreshPeriod_4I_5I: push_word(display_set_auto_update_period(p0)); break; case getRefreshCompleteTime_4_5I: push_word(display_get_update_complete_time()); break; case bitBlt_4_1BIIII_1BIIIIIII_5V: { Object *src = word2ptr(p0); Object *dst = word2ptr(paramBase[5]); display_bitblt((byte *)(src != NULL ?jbyte_array(src):NULL), paramBase[1], paramBase[2], paramBase[3], paramBase[4], (byte *)(dst!=NULL?jbyte_array(dst):NULL), paramBase[6], paramBase[7], paramBase[8], paramBase[9], paramBase[10], paramBase[11], paramBase[12]); break; } case getSystemFont_4_5_1B: push_word(display_get_font()); break; case setContrast_4I_5V: nxt_lcd_set_pot(p0); break; case getBatteryStatus_4_5I: push_word(battery_voltage()); break; case getButtons_4_5I: push_word(buttons_get()); break; case getTachoCountById_4I_5I: push_word(nxt_motor_get_count(p0)); break; case controlMotorById_4III_5V: nxt_motor_set_speed(p0, paramBase[1], paramBase[2]); break; case resetTachoCountById_4I_5V: nxt_motor_set_count(p0, 0); break; case i2cEnableById_4II_5V: if (i2c_enable(p0, paramBase[1]) == 0) return EXEC_RETRY; else break; case i2cDisableById_4I_5V: i2c_disable(p0); break; case i2cStatusById_4I_5I: push_word(i2c_status(p0)); break; case i2cStartById_4II_1BIII_5I: { Object *p = word2obj(paramBase[2]); JBYTE *byteArray = p ? jbyte_array(p) + paramBase[3] : NULL; push_word(i2c_start(p0, paramBase[1], (U8 *)byteArray, paramBase[4], paramBase[5])); } break; case i2cCompleteById_4I_1BII_5I: { Object *p = word2ptr(paramBase[1]); JBYTE *byteArray = p ? jbyte_array(p) + paramBase[2] : NULL; push_word(i2c_complete(p0, (U8 *)byteArray, paramBase[3])); } break; case playFreq_4III_5V: sound_freq(p0,paramBase[1], paramBase[2]); break; case btGetBC4CmdMode_4_5I: push_word(bt_get_mode()); break; case btSetArmCmdMode_4I_5V: if (p0 == 0) bt_set_arm7_cmd(); else bt_clear_arm7_cmd(); break; case btSetResetLow_4_5V: bt_set_reset_low(); break; case btSetResetHigh_4_5V: bt_set_reset_high(); break; case btWrite_4_1BII_5I: { Object *p = word2ptr(p0); byte *byteArray = (byte *) jbyte_array(p); push_word(bt_write(byteArray, paramBase[1], paramBase[2])); } break; case btRead_4_1BII_5I: { Object *p = word2ptr(p0); byte *byteArray = (byte *) jbyte_array(p); push_word(bt_read(byteArray, paramBase[1], paramBase[2])); } break; case btPending_4_5I: { push_word(bt_event_check(0xffffffff)); } break; case btEnable_4_5V: if (bt_enable() == 0) return EXEC_RETRY; else break; case btDisable_4_5V: bt_disable(); break; case usbRead_4_1BII_5I: { Object *p = word2ptr(p0); byte *byteArray = (byte *) jbyte_array(p); push_word(udp_read(byteArray,paramBase[1], paramBase[2])); } break; case usbWrite_4_1BII_5I: { Object *p = word2ptr(p0); byte *byteArray = (byte *) jbyte_array(p); push_word(udp_write(byteArray,paramBase[1], paramBase[2])); } break; case usbStatus_4_5I: { push_word(udp_event_check(0xffffffff)); } break; case usbEnable_4I_5V: { udp_enable(p0); } break; case usbDisable_4_5V: { udp_disable(); } break; case usbReset_4_5V: udp_reset(); break; case usbSetSerialNo_4Ljava_3lang_3String_2_5V: { byte *p = word2ptr(p0); int len; Object *charArray = (Object *) word2ptr(get_word_4_ns(fields_start(p))); len = get_array_length(charArray); udp_set_serialno((U8 *)jchar_array(charArray), len); } break; case usbSetName_4Ljava_3lang_3String_2_5V: { byte *p = word2ptr(p0); int len; Object *charArray = (Object *) word2ptr(get_word_4_ns(fields_start(p))); len = get_array_length(charArray); udp_set_name((U8 *)jchar_array(charArray), len); } break; case flashWritePage_4_1BI_5I: { Object *p = word2ptr(p0); unsigned long *intArray = (unsigned long *) jint_array(p); push_word(flash_write_page(intArray,paramBase[1])); } break; case flashReadPage_4_1BI_5I: { Object *p = word2ptr(p0); unsigned long *intArray = (unsigned long *) jint_array(p); push_word(flash_read_page(intArray,paramBase[1])); } break; case flashExec_4II_5I: push_word(run_program((byte *)(&FLASH_BASE[(p0*FLASH_PAGE_SIZE)]), paramBase[1])); break; case playSample_4IIIII_5V: sound_play_sample(((unsigned char *) &FLASH_BASE[(p0*FLASH_PAGE_SIZE)]) + paramBase[1],paramBase[2],paramBase[3],paramBase[4]); break; case playQueuedSample_4_1BIIII_5I: push_word(sound_add_sample((U8 *)jbyte_array(word2obj(p0)) + paramBase[1],paramBase[2],paramBase[3],paramBase[4])); break; case getTime_4_5I: push_word(sound_get_time()); break; case getDataAddress_4Ljava_3lang_3Object_2_5I: if (is_array(word2obj(p0))) push_word (ptr2word ((byte *) array_start(word2ptr(p0)))); else push_word (ptr2word ((byte *) fields_start(word2ptr(p0)))); break; case getObjectAddress_4Ljava_3lang_3Object_2_5I: push_word(p0); break; case gc_4_5V: // Restartable garbage collection return garbage_collect(); case shutDown_4_5V: shutdown(); // does not return case boot_4_5V: display_clear(1); while (1) nxt_avr_firmware_update_mode(); // does not return case arraycopy_4Ljava_3lang_3Object_2ILjava_3lang_3Object_2II_5V: return arraycopy(word2ptr(p0), paramBase[1], word2ptr(paramBase[2]), paramBase[3], paramBase[4]); case executeProgram_4I_5V: // Exceute program, allow for instruction re-start return execute_program(p0); case setDebug_4_5V: set_debug(word2ptr(p0)); break; case eventOptions_4II_5I: { byte old = debugEventOptions[p0]; debugEventOptions[p0] = (byte)paramBase[1]; push_word(old); } break; case suspendThread_4Ljava_3lang_3Object_2_5V: suspend_thread(ref2ptr(p0)); break; case resumeThread_4Ljava_3lang_3Object_2_5V: resume_thread(ref2ptr(p0)); break; case getProgramExecutionsCount_4_5I: push_word(gProgramExecutions); break; case getFirmwareRevision_4_5I: push_word((STACKWORD) getRevision()); break; case getFirmwareRawVersion_4_5I: push_word((STACKWORD) VERSION_NUMBER); break; case hsEnable_4II_5V: { if (hs_enable((int)p0, (int)paramBase[1]) == 0) return EXEC_RETRY; } break; case hsDisable_4_5V: { hs_disable(); } break; case hsWrite_4_1BII_5I: { Object *p = word2ptr(p0); byte *byteArray = (byte *) jbyte_array(p); push_word(hs_write(byteArray, paramBase[1], paramBase[2])); } break; case hsRead_4_1BII_5I: { Object *p = word2ptr(p0); byte *byteArray = (byte *) jbyte_array(p); push_word(hs_read(byteArray, paramBase[1], paramBase[2])); } break; case hsPending_4_5I: { push_word(hs_pending()); } break; case hsSend_4BB_1BII_1C_5I: { Object *p = word2ptr(paramBase[2]); U8 *data = (U8 *)jbyte_array(p); p = word2ptr(paramBase[5]); U16 *crc = (U16 *)jchar_array(p); push_word(hs_send((U8) p0, (U8)paramBase[1], data, paramBase[3], paramBase[4], crc)); } break; case hsRecv_4_1BI_1CI_5I: { Object *p = word2ptr(p0); U8 *data = (U8 *)jbyte_array(p); p = word2ptr(paramBase[2]); U16 *crc = (U16 *)jchar_array(p); push_word(hs_recv(data, paramBase[1], crc, paramBase[3])); } break; case getUserPages_4_5I: push_word(FLASH_MAX_PAGES - flash_start_page); break; case setVMOptions_4I_5V: gVMOptions = p0; break; case getVMOptions_4_5I: push_word(gVMOptions); break; case isAssignable_4II_5Z: push_word(is_assignable(p0, paramBase[1])); break; case cloneObject_4Ljava_3lang_3Object_2_5Ljava_3lang_3Object_2: { Object *newObj = clone((Object *)ref2obj(p0)); if (newObj == NULL) return EXEC_RETRY; push_word(obj2ref(newObj)); } break; case memPeek_4III_5I: push_word(mem_peek(p0, paramBase[1], paramBase[2])); break; case memCopy_4Ljava_3lang_3Object_2IIII_5V: mem_copy(word2ptr(p0), paramBase[1], paramBase[2], paramBase[3], paramBase[4]); break; case memGetReference_4II_5Ljava_3lang_3Object_2: push_word(mem_get_reference(p0, paramBase[1])); break; case setSensorPin_4III_5V: sp_set(p0, paramBase[1], paramBase[2]); break; case getSensorPin_4II_5I: push_word(sp_get(p0, paramBase[1])); break; case setSensorPinMode_4III_5V: sp_set_mode(p0, paramBase[1], paramBase[2]); break; case readSensorPin_4II_5I: push_word(sp_read(p0, paramBase[1])); break; case nanoTime_4_5J: { U64 ns = systick_get_ns(); push_word(ns >> 32); push_word(ns); } break; case createStackTrace_4Ljava_3lang_3Thread_2Ljava_3lang_3Object_2_5_1I: { Object *trace = create_stack_trace((Thread *)ref2obj(p0), ref2obj(paramBase[1])); if (trace == NULL) return EXEC_RETRY; push_word(obj2ref(trace)); } break; case registerEvent_4_5I: push_word(register_event((NXTEvent *) ref2obj(p0))); break; case unregisterEvent_4_5I: push_word(unregister_event((NXTEvent *) ref2obj(p0))); break; case changeEvent_4II_5I: push_word(change_event((NXTEvent *) ref2obj(p0), paramBase[1], paramBase[2])); break; case isInitialized_4I_5Z: push_word(is_initialized_idx(p0)); break; case allocate_4II_5Ljava_3lang_3Object_2: { Object *allocated; if(paramBase[1]>0){ allocated=new_single_array(p0,paramBase[1]); }else{ allocated=new_object_for_class(p0); } if(allocated == NULL) return EXEC_RETRY; push_word(obj2ref(allocated)); } break; case memPut_4IIII_5V: store_word_ns((byte *)(memory_base[p0] + paramBase[1]), paramBase[2],paramBase[3]); break; case notifyEvent_4ILjava_3lang_3Thread_2_5Z: push_word(debug_event(paramBase[1], NULL, (Thread*) ref2obj(paramBase[2]), 0, 0, 0, 0)); break; case setThreadRequest_4Ljava_3lang_3Thread_2Llejos_3nxt_3debug_3SteppingRequest_2_5V: { Thread *th = (Thread*) ref2obj(p0); th->debugData = (REFERENCE) paramBase[1]; // currently we only get stepping requests if(paramBase[1]) th->flags |= THREAD_STEPPING; else th->flags &= ~THREAD_STEPPING; } break; case isStepping_4Ljava_3lang_3Thread_2_5Z: { Thread *th = (Thread*) ref2obj(p0); push_word(is_stepping(th)); } break; case setBreakpointList_4_1Llejos_3nxt_3debug_3Breakpoint_2I_5V: breakpoint_set_list((Breakpoint**) array_start(p0), paramBase[1]); break; case enableBreakpoint_4Llejos_3nxt_3debug_3Breakpoint_2Z_5V: breakpoint_enable((Breakpoint*) word2ptr(p0), (boolean) paramBase[1]); break; case firmwareExceptionHandler_4Ljava_3lang_3Throwable_2II_5V: firmware_exception_handler((Throwable *)p0, paramBase[1], paramBase[2]); break; case exitThread_4_5V: currentThread->state = DEAD; schedule_request(REQUEST_SWITCH_THREAD); break; case updateThreadFlags_4Ljava_3lang_3Thread_2II_5I: ((Thread *)p0)->flags |= paramBase[1]; ((Thread *)p0)->flags &= ~paramBase[2]; //printf("m %x %d\n", p0, ((Thread *)p0)->flags); push_word(((Thread *)p0)->flags); break; default: return throw_new_exception(JAVA_LANG_NOSUCHMETHODERROR); } return EXEC_CONTINUE; }
/** * @param classRecord Record for method class. * @param methodRecord Calle's method record. * @param retAddr What the PC should be upon return. * @return true iff the stack frame was pushed. */ boolean dispatch_special (MethodRecord *methodRecord, byte *retAddr) { /** * Note: This code is a little tricky, particularly when used with * a garbage collector. It manipulates the stack frame and in some cases * may need to perform memory allocation. In all cases we must take care * to ensure that if an allocation can be made then any live objects * on the stack must be below the current stack pointer. * In addition to the above we take great care so that this function can * be restarted (to allow us to wait for available memory). To enable this * we avoid making any commitments to changes to global state until both * stacks have been commited. */ #if DEBUG_METHODS int debug_ctr; #endif Object *stackFrameArray; StackFrame *stackFrame; StackFrame *stackBase; int newStackFrameIndex; STACKWORD *newStackTop; #if DEBUG_BYTECODE printf("call method %d ret %x\n", methodRecord - get_method_table(get_class_record(0)), retAddr); printf ("\n------ dispatch special - %d ------------------\n\n", methodRecord->signatureId); #endif #if DEBUG_METHODS printf ("dispatch_special: %d, %d\n", (int) methodRecord, (int) retAddr); printf ("-- signature id = %d\n", methodRecord->signatureId); printf ("-- code offset = %d\n", methodRecord->codeOffset); printf ("-- flags = %d\n", methodRecord->mflags); printf ("-- num params = %d\n", methodRecord->numParameters); //printf ("-- stack ptr = %d\n", (int) get_stack_ptr()); //printf ("-- max stack ptr= %d\n", (int) (currentThread->stackArray + (get_array_size(currentThread->stackArray))*2)); #endif // First deal with the easy case of a native call... if (is_native (methodRecord)) { #if DEBUG_METHODS printf ("-- native\n"); #endif // WARNING: Once the instruction below has been executed we may have // references on the stack that are above the stack pointer. If a GC // gets run when in this state the reference may get collected as // grabage. This means that any native functions that take a reference // parameter and that may end up allocating memory *MUST* protect that // reference before calling the allocator... pop_words_cur (methodRecord->numParameters); switch(dispatch_native (methodRecord->signatureId, get_stack_ptr_cur() + 1)) { case EXEC_RETRY: // Need to re-start the instruction, so reset the state of the stack curStackTop += methodRecord->numParameters; break; case EXEC_CONTINUE: // Normal completion return to the requested point. curPc = retAddr; break; case EXEC_RUN: // We are running new code, curPc will be set. Nothing to do. break; case EXEC_EXCEPTION: // An exception has been thrown. The PC will be set correctly and // the stack may have been adjusted... break; } // Stack frame not pushed return false; } // Now start to build the new stack frames. We start by placing the // the new stack pointer below any params. The params will become locals // in the new frame. newStackTop = get_stack_ptr_cur() - methodRecord->numParameters; newStackFrameIndex = (int)(byte)currentThread->stackFrameIndex; if (newStackFrameIndex >= 255) { throw_new_exception (JAVA_LANG_STACKOVERFLOWERROR); return false; } #if DEBUG_METHODS //for (debug_ctr = 0; debug_ctr < methodRecord->numParameters; debug_ctr++) // printf ("-- param[%d] = %ld\n", debug_ctr, (long) get_stack_ptr()[debug_ctr+1]); #endif stackFrameArray = ref2obj(currentThread->stackFrameArray); stackBase = (StackFrame *)array_start(stackFrameArray); // Setup OLD stackframe ready for return stackFrame = stackBase + (newStackFrameIndex); stackFrame->stackTop = newStackTop; stackFrame->pc = retAddr; // Push NEW stack frame // Increment size of stack frame array but do not commit to it until we have // completely built both new stacks. newStackFrameIndex++; stackFrame++; if (((byte *)stackFrame - (byte *)stackBase) >= get_array_length(stackFrameArray)) { #if FIXED_STACK_SIZE throw_new_exception (JAVA_LANG_STACKOVERFLOWERROR); return false; #else if (expand_call_stack(currentThread) < 0) return false; stackFrame = (StackFrame *)array_start(currentThread->stackFrameArray) + newStackFrameIndex; #endif } // Initialize rest of new stack frame stackFrame->methodRecord = methodRecord; stackFrame->monitor = null; stackFrame->localsBase = newStackTop + 1; // Allocate space for locals etc. newStackTop = init_sp(stackFrame, methodRecord); stackFrame->stackTop = newStackTop; currentThread->stackFrameIndex = newStackFrameIndex; // Check for stack overflow if (is_stack_overflow (newStackTop, methodRecord)) { #if FIXED_STACK_SIZE throw_new_exception (JAVA_LANG_STACKOVERFLOWERROR); return false; #else if (expand_value_stack(currentThread, methodRecord->maxOperands+methodRecord->numLocals) < 0) { currentThread->stackFrameIndex--; return false; } // NOTE at this point newStackTop is no longer valid! newStackTop = stackFrame->stackTop; #endif } // All set. So now we can finally commit to the new stack frames update_constant_registers (stackFrame); curStackTop = newStackTop; // and jump to the start of the new code curPc = get_code_ptr(methodRecord); return true; }
/** * Exceute the static initializer if required. Note that the ret address used * here is set such that the current instruction will be re-started when the * initialization completes. * @return An indication of how the VM should proceed */ int dispatch_static_initializer (ClassRecord *aRec, byte *retAddr) { int state = get_init_state(aRec); ClassRecord *init = aRec; ClassRecord *super = get_class_record(init->parentClass); MethodRecord *method; // Are we needed? if (state & C_INITIALIZED) return EXEC_CONTINUE; // We need to initialize all of the super classes first. So we find the // highest one that has not been initialized and deal with that. This code // will then be called again and we will init the next highest and so on // until all of the classes in the chain are done. for(;;) { // find first super class that has not been initialized while (init != super && (get_init_state(super) & C_INITIALIZED) == 0) { init = super; super = get_class_record(init->parentClass); } // Do we have an initilizer if so we have found our class if (has_clinit (init)) break; // no initializer so mark as now initialized set_init_state (init, C_INITIALIZED); // If we are at the start of the list we are done if (init == aRec) return EXEC_CONTINUE; // Otherwise go do it all again init = aRec; } state = get_init_state(init); // are we already initializing ? if (state & C_INITIALIZING) { // Is it this thread that is doing the init? if (get_sync(init)->threadId == currentThread->threadId) return EXEC_CONTINUE; // No so we must retry the current instruction curPc = retAddr; sleep_thread(1); schedule_request(REQUEST_SWITCH_THREAD); return EXEC_RETRY; } #if DEBUG_METHODS printf ("dispatch_static_initializer: has clinit: %d, %d\n", (int) aRec, (int) retAddr); #endif // Static initializer is always the first method method = get_method_table(init); if ((byte *)method == get_binary_base() || method->signatureId != _6clinit_7_4_5V) { throw_new_exception (JAVA_LANG_NOSUCHMETHODERROR); return EXEC_EXCEPTION; } // Can we run it? if (!dispatch_special (method, retAddr)) return EXEC_RETRY; // Mark for next time set_init_state(init, C_INITIALIZING); // and claim the monitor current_stackframe()->monitor = (Object *)init; enter_monitor (currentThread, (Object *)init); return EXEC_RUN; }