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PVM.py
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PVM.py
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####################################################
# #
# Simple-VM #
# Simple Simulater to execute instructions. #
# #
# by Pei #
####################################################
# 加载相关库
import gi
import re
import time
import threading
gi.require_version('Gtk','3.0')
from gi.repository import Gtk, Pango, Gdk, GObject, GLib
# 线程初始化
GObject.threads_init()
#-------------------------------------全局常量与相关信号量定义-----------------------------------------------
filename = "program.txt" # 预处理用户代码后保存的位置，即虚拟机每次执行的代码在磁盘存放位置
INT_VECTOR = [0x186A0,0x186AA] # 中断向量，Simple-VM预设了两组中断程序，其代码初始位置由中断向量给出
label_output = [""] # 存储显示区信息的结构
REG = [] # 寄存器List数据结构，用来存储通用寄存器、特殊寄存器数值
MEM_DATA = [] # 内存代码区Dictionary List数据结构，用来存储中断代码以及用户代码
MEM_CODE = [] # 内存数据区List数据结构，用来存储用户数据和堆栈数据
NUM_REG = 16 # 默认的寄存器数量
PC_REG = 13 # PC在寄存器List中的位置
SP_REG = 14 # SP在寄存器List中的位置
CC_REG = 15 # CC在寄存器List中的位置
LEN_MEM_DATA = 65537 # 内存数据区长度
LEN_MEM_CODE = 65535 # 内存代码区长度，在GUI中，代码区地址需要加上数据区长度的偏移量
INT_START = 98302 # 中断代码区起始位置
INT_END = 131071 # 中断代码区结束位置
POS_STACK = 32768 # 内存数据区的堆栈起始位置
POS_EXTEND = 60001 # 内存待扩展区起始位置 内存数据区按地址顺序分别为数据区、堆栈区、待扩展区
HOST_NAME = "Pei" # 个性化配置中的虚拟机名
INT_NUMBER = 0 # 中断序列号，用户中断时会记录对应的中断代码序号
last_sp = 0 # 上一次栈指针位置，单级中断只需要单个变量保存
signal_run = False # True：虚拟机运行状态 False：虚拟机不运行
signal_pause = False # 虚拟机暂停信号
signal_onestep = False # 虚拟机单步执行信号
signal_int_happen = False # 虚拟机中断出现信号
signal_int_run = False # 虚拟机中断正处理信号
signal_jmp = False # 虚拟机指令流中出现跳转信号
mutex_one = False # 虚拟机单步执行模式中的控制前进信号
frequency = 1 # 虚拟机运行频率（用指令间延时估计）
is_end = False # 虚拟机结束信号
error_happen = False # 虚拟机异常信号
#----------------------------------------------------------------------------------------------------------
#########################################
# #
# #
# 虚拟机图形主体：窗口类 #
# #
# #
#########################################
#---------------------启动窗口：继承自Gtk.Window，功能：窗口切换、选择用户代码、用户代码预处理-------------------
class StartWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="Simple-VM")
self.set_border_width(20)
self.set_resizable(False)
self.set_size_request(400,550)
box = Gtk.VBox()
# 图标设置
grand = Gtk.Image.new_from_file("dog.png")
box.pack_start(grand, False, False, 0)
# 按钮设置
box_option = Gtk.Box(spacing=10)
# 设置键
button_setting = Gtk.Button.new_from_icon_name("emblem-system-symbolic", Gtk.IconSize.MENU)
button_setting.connect("clicked",self.on_setting_clicked)
# 启动键
button_start = Gtk.Button.new_from_icon_name("open-menu-symbolic", Gtk.IconSize.MENU)
button_start.connect("clicked",self.on_start_clicked)
# 退出键
button_quit = Gtk.Button.new_from_icon_name("window-close-symbolic", Gtk.IconSize.MENU)
button_quit.connect("clicked",self.on_quit_clicked)
alignment = Gtk.Alignment.new(0.5,0.2,0,0)
alignment.add(box_option)
box_option.pack_start(button_setting,False,True,0)
box_option.pack_start(button_start,False,True,0)
box_option.pack_start(button_quit,False,True,0)
# 附加信息
none = Gtk.Label() # 空行标签
# 软件名、软件功能简洁、软件用户手册链接
label1 = Gtk.Label()
label1.set_markup("<big><b>Simple-Virtual Machine</b></big>")
label2 = Gtk.Label("")
label2.set_markup("Simple Simulater To Execute built-in Instructions")
font = Pango.FontDescription("Sans 7")
label2.modify_font(font)
label3 = Gtk.Label()
label3.set_markup("<a href=\"silicat.info\" title=\"Click it\">More Details</a>")
label3.modify_font(font)
# 容器装入
box.pack_start(label1,False,True,0)
box.pack_start(alignment,True,True,0)
box.pack_start(label2,False,True,0)
box.pack_start(none,False,True,0)
box.pack_start(label3,False,True,0)
self.add(box)
# 预处理程序
def VM_preprocess(self, src_filename,new_filename):
file = open(src_filename,"r")
newF = open(new_filename,"w")
new_file = ''
for line in file.readlines():
line = line.strip()
# 处理空行
if (len(line) == 0):
continue
# 处理用户注释
pos_comment = line.find("//")
if (pos_comment != -1):
line = line[0:pos_comment - 1]
# 读取用户指令进行双操作数扩展，不足的用NULL字段填充
ins = re.compile('\s+').split(line)
if (ins[-1]==""):
ins = ins[0:-1]
if (len(ins) == 1):
ins.append('NULL')
ins.append('NULL')
elif (len(ins) == 2):
ins.append('NULL')
# 虚拟机主循环需要，设计问题，与实验无关，需要在HLT前加NOP指令
if (ins[0] == "HLT"):
new_file = new_file + "NOP NULL NULL\n"
new_file = new_file + " ".join(ins) + '\n'
# 将处理之后的代码存入新的文件，供虚拟机加载
newF.write(new_file)
file.close()
newF.close()
# 启动键响应事件函数，利用FileChooser控件供用户进行代码文件选择
def on_start_clicked(self, widget):
dialog = Gtk.FileChooserDialog("Choose File", self,Gtk.FileChooserAction.OPEN,(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,Gtk.STOCK_OPEN, Gtk.ResponseType.OK))
self.add_filters(dialog)
response = dialog.run()
if response == Gtk.ResponseType.OK:
self.VM_preprocess(dialog.get_filename(),filename)
dialog.destroy()
# 成功选择用户代码之后，将虚拟机运行信号置有效并退出当前窗口
global signal_run
signal_run = True
self.destroy()
Gtk.main_quit()
# 配合FileChooser的文件筛选器
def add_filters(self, dialog):
filter_text = Gtk.FileFilter()
filter_text.set_name("Text files")
filter_text.add_mime_type("text/plain")
dialog.add_filter(filter_text)
filter_any = Gtk.FileFilter()
filter_any.set_name("Any files")
filter_any.add_pattern("*")
dialog.add_filter(filter_any)
# 设置键事件函数，退出当前窗口并进入设置界面
def on_setting_clicked(self, button):
self.destroy()
Gtk.main_quit()
setting_window = SettingWindow()
setting_window.connect("delete-event",Gtk.main_quit)
setting_window.show_all()
Gtk.main()
# 退出键事件函数，直接退出虚拟机
def on_quit_clicked(self, button):
Gtk.main_quit()
#-----------------------------------------------------------------------------------------------------------
#--------------------设置窗口：继承自Gtk.Window，功能：提供个性化配置，建议不要修改，用户手册给出推荐配置----------
class SettingWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="Simple-VM")
self.set_border_width(20)
self.set_resizable(False)
self.set_size_request(400,550)
# 标题栏设置，将返回键设置在标题栏，体现了Simple-VM的简洁性
hb = Gtk.HeaderBar()
hb.set_show_close_button(True)
hb.props.title = "Simple-VM"
hb.set_subtitle("Setting")
self.set_titlebar(hb)
# 返回按钮，箭形图标
box = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL)
button=Gtk.Button()
button.add(Gtk.Arrow(arrow_type=Gtk.ArrowType.LEFT,shadow_type=Gtk.ShadowType.NONE))
button.connect("clicked",self.on_clicked)
box.add(button)
hb.pack_start(box)
# 设置信息：内存设置
frame_memory = Gtk.Frame.new("Memory")
frame_memory.set_shadow_type(Gtk.ShadowType.ETCHED_OUT)
vbox = Gtk.VBox()
label = Gtk.Label("Data Size:"); self.entry1 = Gtk.Entry(); self.entry1.set_text(str(LEN_MEM_DATA))
button1 = Gtk.Button(label="Confirm"); button1.connect("clicked",self.on_confirm_data)
hbox = Gtk.HBox(); hbox.pack_start(label,True,False,0); hbox.pack_start(self.entry1,True,False,0); hbox.pack_start(button1,True,False,0)
vbox.pack_start(hbox,True,False,0)
label = Gtk.Label("Code Size:"); self.entry2 = Gtk.Entry(); self.entry2.set_text(str(LEN_MEM_CODE))
button1 = Gtk.Button(label="Confirm"); button1.connect("clicked",self.on_confirm_code)
hbox = Gtk.HBox(); hbox.pack_start(label,True,False,0); hbox.pack_start(self.entry2,True,False,0); hbox.pack_start(button1,True,True,0)
vbox.pack_start(hbox,True,False,0)
label = Gtk.Label("Position of Stack:"); self.entry3 = Gtk.Entry(); self.entry3.set_text(str(POS_STACK))
button1 = Gtk.Button(label="Confirm"); button1.connect("clicked",self.on_confirm_stack)
hbox = Gtk.HBox(); hbox.pack_start(label,True,True,0); hbox.pack_start(self.entry3,True,True,0); hbox.pack_start(button1,True,True,0)
vbox.pack_start(hbox,True,False,0)
frame_memory.add(vbox)
# 设置信息：寄存器设置
none = Gtk.Label(" ")
frame_reg = Gtk.Frame.new("Register")
frame_reg.set_shadow_type(Gtk.ShadowType.ETCHED_OUT)
vbox = Gtk.VBox()
label = Gtk.Label("Number of Register:"); self.entry4 = Gtk.Entry(); self.entry4.set_text(str(NUM_REG))
button1 = Gtk.Button(label="Confirm"); button1.connect("clicked",self.on_confirm_reg)
hbox = Gtk.HBox(); hbox.pack_start(label,True,True,0); hbox.pack_start(self.entry4,True,True,0); hbox.pack_start(button1,True,True,0)
vbox.pack_start(hbox,True,False,0)
frame_reg.add(vbox)
# 设置信息： 其他设置（虚拟机名，可显示在运行窗口的子标题中；开机后单步执行模式开关）
frame_others = Gtk.Frame.new("Others")
frame_others.set_shadow_type(Gtk.ShadowType.ETCHED_OUT)
vbox=Gtk.VBox()
label = Gtk.Label("Host Name:"); self.entry5 = Gtk.Entry(); self.entry5.set_text(str(HOST_NAME))
button1 = Gtk.Button(label="Confirm"); button1.connect("clicked",self.on_confirm_name)
hbox = Gtk.HBox(); hbox.pack_start(label,True,True,0); hbox.pack_start(self.entry5,True,True,0); hbox.pack_start(button1,True,True,0)
vbox.pack_start(hbox,True,False,0)
frame_others.add(vbox)
box = Gtk.VBox()
box.pack_start(frame_memory,True,True,0)
box.pack_start(frame_reg,True,True,0)
box.pack_start(frame_others,True,True,0)
self.add(box)
def on_confirm_data(self,button):
global LEN_MEM_DATA
LEN_MEM_DATA = int(self.entry1.get_text())
def on_confirm_code(self,button):
global LEN_MEM_CODE
LEN_MEM_CODE = int(self.entry2.get_text())
def on_confirm_stack(self,button):
global POS_STACK
POS_STACK = int(self.entry3.get_text())
def on_confirm_reg(self,button):
global NUM_REG
NUM_REG = int(self.entry4.get_text())
def on_confirm_name(self,button):
global HOST_NAME
HOST_NAME = self.entry5.get_text()
# 返回键事件函数：关闭当前窗口，返回启动界面
def on_clicked(self, button):
self.destroy()
Gtk.main_quit()
start_window = StartWindow()
start_window.connect("delete-event",Gtk.main_quit)
start_window.show_all()
Gtk.main()
#------------------------------------------------------------------------------------------------------------
#--------------------运行窗口：继承自Gtk.Window，功能：提供机器状态展示、虚拟机控制功能等-------------------------
class RunningWindow(Gtk.Window):
# 一些重要的成员变量
regs = [] # 寄存器控件组
mem_data = [] # 内存数据区控件组
mem_code = [] # 内存代码区控件组
output_labels = [] # 显示区信息标签控件组
entry = None # 输入框
data_start = 0
data_end = 99
code_start = 0 + LEN_MEM_DATA
code_end = 99 + LEN_MEM_DATA
def __init__(self):
Gtk.Window.__init__(self, title="Simple-VM")
self.set_border_width(20)
self.set_resizable(False)
self.set_size_request(400,550)
# 标题栏设置，增加子标题为虚拟机名
hb = Gtk.HeaderBar()
hb.set_show_close_button(True)
hb.props.title = "Simple-VM"
global HOST_NAME
hb.set_subtitle(HOST_NAME)
self.set_titlebar(hb)
vbox = Gtk.VBox(spacing=6)
self.add(vbox)
# 机器状态显示区：分成四页，分别是数据区、代码区、寄存器区、虚拟机及程序输出信息区
frame_device = Gtk.Frame.new("")
frame_device.set_shadow_type(Gtk.ShadowType.ETCHED_OUT)
device_view = Gtk.Stack()
device_view.set_transition_type(Gtk.StackTransitionType.SLIDE_LEFT_RIGHT)
device_view.set_transition_duration(1000)
# 数据区视图,采用滚动布局
md_box = Gtk.VBox()
alignment = Gtk.Alignment.new(0,0,0,0)
alignment.add(md_box)
sw_data = Gtk.ScrolledWindow(); sw_data.set_size_request(200,200)
sw_data.set_shadow_type(Gtk.ShadowType.ETCHED_IN)
sw_data.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
sw_data.add(alignment)
# 新增内存数据区查看范围设置
self.data_entry1 = Gtk.Entry(); self.data_entry2 = Gtk.Entry()
self.data_entry1.set_width_chars(8); self.data_entry2.set_width_chars(8)
self.data_entry1.set_text(str(self.data_start)); self.data_entry2.set_text(str(self.data_end))
data_scale_button = Gtk.Button("Confirm"); data_scale_button.connect("clicked",self.data_scale)
temp_box = Gtk.HBox(); temp_box.pack_start(self.data_entry1,True,True,0); temp_box.pack_start(self.data_entry2,True,True,0)
temp_box.pack_start(data_scale_button,True,True,0); md_box.pack_start(temp_box,True,True,0)
# 数据区布局
md = Gtk.Label("Address"+" "*10+"Value(DEC)"+" "*10+"Value(HEX)") # 数据区第一行信息栏
self.mem_data.append(md)
md_box.pack_start(md,False,False,0)
global MEM_DATA,LEN_MEM_DATA
for i in range(100):
md1 = Gtk.Label(hex(i)); md2 = Gtk.Label("0"); md3 = Gtk.Label(hex(0))
self.mem_data.append([md1,md2,md3])
# 固定布局，确认显示对齐
MD = Gtk.Fixed()
md1.set_xalign(0); md2.set_xalign(0); md3.set_xalign(0)
MD.put(md1,0,0); MD.put(md2,150,0);MD.put(md3,300,0)
md_box.pack_start(MD,True,True,0)
device_view.add_titled(sw_data,"data","Memory-Data")
# 代码区视图：采取滚动布局
mc_box = Gtk.VBox()
alignment = Gtk.Alignment.new(0,0,0,0)
alignment.add(mc_box); sw_code = Gtk.ScrolledWindow()
sw_code.set_shadow_type(Gtk.ShadowType.ETCHED_IN)
sw_code.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
sw_code.add(alignment)
# 新增内存代码区查看范围设置
self.code_entry1 = Gtk.Entry(); self.code_entry2 = Gtk.Entry()
self.code_entry1.set_width_chars(8); self.code_entry2.set_width_chars(8)
self.code_entry1.set_text(str(self.code_start)); self.code_entry2.set_text(str(self.code_end))
code_scale_button = Gtk.Button("Confirm"); code_scale_button.connect("clicked",self.code_scale)
temp_box = Gtk.HBox(); temp_box.pack_start(self.code_entry1,True,True,0); temp_box.pack_start(self.code_entry2,True,True,0)
temp_box.pack_start(code_scale_button,True,True,0); mc_box.pack_start(temp_box,True,True,0)
# 代码区布局
mc = Gtk.Label("Address"+" "*10+"Ins"+" "*10+"op1"+" "*10+"op2") # 代码区第一行为信息栏
self.mem_code.append(mc)
mc_box.pack_start(mc,True,True,0)
global MEM_CODE,LEN_MEM_CODE
for i in range(100):
mc0 = Gtk.Label(hex(i+LEN_MEM_DATA))
mc1 = Gtk.Label(str(MEM_CODE[i-1]['insName'])); mc2 = Gtk.Label(str(MEM_CODE[i-1]['op1'])); mc3 = Gtk.Label(str(MEM_CODE[i-1]['op2']))
self.mem_code.append([mc0,mc1,mc2,mc3])
# 采用固定布局，保证显示对齐
MC = Gtk.Fixed()
mc0.set_xalign(0); mc1.set_xalign(0); mc2.set_xalign(0); mc3.set_xalign(0)
MC.put(mc0,0,0); MC.put(mc1,100,0); MC.put(mc2,200,0);MC.put(mc3,300,0)
mc_box.pack_start(MC,True,True,0)
device_view.add_titled(sw_code,"code","Memory-Code")
# 寄存器视图：采用嵌套Box布局和Fixed布局
label_reg = Gtk.Fixed()
frame_reg = Gtk.Frame.new("")
frame_reg.set_shadow_type(Gtk.ShadowType.ETCHED_OUT)
frame_reg.add(label_reg)
global NUM_REG,PC_REG,SP_REG,CC_REG
for i in range(NUM_REG):
reg_row = Gtk.Box()
for j in range(4):
# 对于特殊寄存器，Simple-VM高亮显示
if (len(self.regs) == PC_REG):
reg = Gtk.Label(); reg.set_markup("<span color=\"red\">PC: </span>")
elif (len(self.regs) == SP_REG):
reg = Gtk.Label(); reg.set_markup("<span color=\"red\">SP: </span>")
elif (len(self.regs) == CC_REG):
reg = Gtk.Label(); reg.set_markup("<span color=\"red\">CC: </span>")
else:
reg = Gtk.Label("R"+str(len(self.regs) + 1))
self.regs.append(reg)
label_reg.put(reg,j * 100, i * 50)
if (len(self.regs) == NUM_REG):
break
if (len(self.regs) == NUM_REG):
break
device_view.add_titled(frame_reg, "reg", "Regsiter")
# 显示区视图：采用滚动布局，对于不同的信息来源采用不同的颜色高亮
mo_box = Gtk.VBox()
alignment = Gtk.Alignment.new(0,0,0,0)
alignment.add(mo_box); sw_code = Gtk.ScrolledWindow()
sw_code.set_shadow_type(Gtk.ShadowType.ETCHED_IN)
sw_code.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
sw_code.add(alignment)
mo = Gtk.Label("Output Information")
self.output_labels.append(mo)
for i in range(1000):
mo = Gtk.Label("")
self.output_labels.append(mo)
mo_box.pack_start(mo,False,False,0)
device_view.add_titled(sw_code,"output","Output")
stack_switcher = Gtk.StackSwitcher()
stack_switcher.set_stack(device_view)
vbox.pack_start(stack_switcher,False,True,1)
vbox.pack_start(device_view,False,True,0)
# 功能按钮：单步多步切换、暂停继续切换、关机键、单步控制、运行频率、模拟中断按钮
frame_buttons = Gtk.Frame.new("ToolKit")
frame_buttons.set_shadow_type(Gtk.ShadowType.ETCHED_OUT)
buttons = Gtk.Grid()
frame_buttons.add(buttons)
buttons.set_row_spacing(30)
buttons.set_column_spacing(60)
# 单步按钮
button1 = Gtk.ToggleButton(label="One Step")
button1.connect("toggled",self.step_shift)
# 关机按钮
button2 = Gtk.Button(label="Power Off")
button2.connect("clicked",self.on_quit_clicked)
# 暂停按钮
button3 = Gtk.Button(label="Pause")
button3.connect("clicked",self.on_pause_clicked)
# 频率按钮：PopOver控件作为二级按钮
self.button4 = Gtk.Button(label="Frequency")
self.button4.connect("clicked",self.on_frequency_clicked)
vbox4 = Gtk.VBox()
fre_0_1 = Gtk.ModelButton("0.1"); vbox4.pack_start(fre_0_1,False,True,0); fre_0_1.connect("clicked",self.on_fre_0_1_clicked)
fre_1_0 = Gtk.ModelButton("1.0"); vbox4.pack_start(fre_1_0,False,True,0); fre_1_0.connect("clicked",self.on_fre_1_0_clicked)
fre_2_0 = Gtk.ModelButton("2.0"); vbox4.pack_start(fre_2_0,False,True,0); fre_2_0.connect("clicked",self.on_fre_2_0_clicked)
fre_5_0 = Gtk.ModelButton("5.0"); vbox4.pack_start(fre_5_0,False,True,0); fre_5_0.connect("clicked",self.on_fre_5_0_clicked)
self.popover = Gtk.Popover()
self.popover.add(vbox4)
self.popover.set_position(Gtk.PositionType.LEFT)
# 模拟中断按钮：采用PopOver控件作为二级按钮
self.button5 = Gtk.Button(label="Interrupt")
self.button5.connect("clicked",self.on_interrupt_clicked)
vbox5 = Gtk.VBox()
int1 = Gtk.ModelButton("INT1"); vbox5.pack_start(int1,False,True,0); int1.connect("clicked",self.on_int1_clicked)
int2 = Gtk.ModelButton("INT2"); vbox5.pack_start(int2,False,True,0); int2.connect("clicked",self.on_int2_clicked)
self.popover5 = Gtk.Popover()
self.popover5.add(vbox5)
self.popover5.set_position(Gtk.PositionType.LEFT)
# 中断前进控制按钮
self.button6 = Gtk.Button(label="Next")
self.button6.set_sensitive(False)
self.button6.connect("clicked",self.on_next_clicked)
# 按钮布局，Grid布局
buttons.attach(button1,0,0,1,1)
buttons.attach(button3,1,0,1,1)
buttons.attach(button2,2,0,1,1)
buttons.attach(self.button6,0,1,1,1)
buttons.attach(self.button4,1,1,1,1)
buttons.attach(self.button5,2,1,1,1)
buttons.set_size_request(100,100)
vbox.pack_start(frame_buttons, True, False, 0)
# 输入框，用Expander存储，可随时隐藏
self.entry = Gtk.Entry()
expand = Gtk.Expander.new("Input")
expand.set_expanded(False)
expand.add(self.entry)
vbox.pack_start(expand,False,False,0)
# 判断虚拟机是否运行信号，若信号有效，显示窗口
global signal_run
if (signal_run):
self.show_all()
# 两组范围确认按钮事件函数
def data_scale(self, data_scale_button):
self.data_start = int(self.data_entry1.get_text())
self.data_end = int(self.data_entry2.get_text())
def code_scale(self, code_scale_button):
self.code_start = int(self.code_entry1.get_text())
self.code_end = int(self.code_entry2.get_text())
# 关机键按钮事件函数：设置虚拟机状态为关闭，关闭窗口
def on_quit_clicked(self,widget):
global is_end
is_end = True
Gtk.main_quit()
# 运行频率按钮事件函数：将二级按钮显示
def on_frequency_clicked(self,widget):
self.popover.set_relative_to(self.button4)
self.popover.show_all()
self.popover.popup()
# 频率二级按钮事件函数，改变虚拟机运行频率（指令间延时）
def on_fre_0_1_clicked(self,widget):
global frequency
frequency = 0.1
def on_fre_1_0_clicked(self,widget):
global frequency
frequency = 1.0
def on_fre_2_0_clicked(self,widget):
global frequency
frequency = 2.0
def on_fre_5_0_clicked(self,widget):
global frequency
frequency = 5.0
# 模拟中断按钮事件函数，调用二级按钮
def on_interrupt_clicked(self,widget):
self.popover5.set_relative_to(self.button5)
self.popover5.show_all()
self.popover5.popup()
# 用户选择中断序列，Simple-VM提供了两个预置中断代码，用户可以自行选择
def on_int1_clicked(self,widget):
global INT_NUMBER
INT_NUMBER = 0
global signal_int_happen,signal_int_run
if (signal_int_run):
# 如果当前已有中断信号，则抛出信息
global label_output; label_output.append("<span color=\"red\">Interrupt has happened.</span>")
else:
# 否则将中断信号置为有效
signal_int_happen = True
def on_int2_clicked(self,widget):
global INT_NUMBER
INT_NUMBER = 1
global signal_int_happen,signal_int_run
if (signal_int_run):
# 如果当前已有中断信号，则抛出信息
global label_output; label_output.append("<span color=\"red\">Interrupt has happened.</span>")
else:
# 否则将中断信号置为有效
signal_int_happen = True
# 单步控制前进按钮事件函数：点击一下，虚拟机继续跑一次指令
def on_next_clicked(self,widget):
global mutex_one,signal_onestep
if (signal_onestep):
mutex_one = True
# 暂停事件函数：改变虚拟机相关信号
def on_pause_clicked(self, button3):
global signal_pause
# 根据虚拟机当前状态选择不同处理，若已暂停则继续，若正在运行则暂停
if (button3.get_label() == "Pause"):
button3.set_label("Continue")
signal_pause = True
else:
button3.set_label("Pause")
signal_pause = False
# 单步按钮事件函数：改变虚拟机相关信号
def step_shift(self,button1):
global signal_onestep
if (button1.get_active()):
signal_onestep = True
self.button6.set_sensitive(True)
self.button4.set_sensitive(False)
else:
signal_onestep = False
self.button6.set_sensitive(False)
self.button4.set_sensitive(True)
#------------------------------------------------------------------------------------------------------------
#########################################
# #
# #
# 虚拟机逻辑主体:逻辑函数 #
# #
# #
#########################################
# 虚拟机初始化函数
def VM_init():
global LEN_MEM_DATA,LEN_MEM_CODE,MEM_DATA,MEM_CODE,REG,PC_REG,SP_REG,signal_jmp,INT_START,INT_END,INT_VECTOR
# 初始化数据区为0
for i in range(LEN_MEM_DATA):
MEM_DATA.append(0)
# 初始化代码区为None
for i in range(LEN_MEM_CODE):
MEM_CODE.append({'insName':None,'op1':None,'op2':None})
# 预置中断代码区
intFile = open("intCode.txt","r").readlines()
for i in range(INT_VECTOR[0],INT_VECTOR[0]+len(intFile)):
temp = intFile[i - INT_VECTOR[0]].split()
MEM_CODE[i-LEN_MEM_DATA-1] = {'insName':temp[0],'op1':temp[1],'op2':temp[2]}
# 清空寄存器，设置SP为初始栈位置-1
for i in range(NUM_REG):
REG.append(0)
REG[PC_REG] = 0
REG[SP_REG] = POS_STACK - 1
# 设置跳转信号为无效
signal_jmp = False
# 虚拟机加载函数
def VM_load(filename):
global MEM_CODE,REG
file = open(filename,"r")
insNum = 0
for line in file.readlines():
# 解析字符串
temp_ins = line.strip().split(' ')
# 构造临时指令结构
ins = {'insName':None,'op1':None,'op2':None}
ins['insName'] = temp_ins[0].upper()
ins['op1'] = temp_ins[1]
ins['op2'] = temp_ins[2]
# 加载该指令到内存
MEM_CODE[insNum] = ins
insNum = insNum + 1
running_window = None
signal_iret = False
# 软件核心主函数
def app_main():
running_window = RunningWindow()
running_window.connect("delete-event",Gtk.main_quit)
# 保存现场
def save_scene():
global MEM_DATA,REG,last_sp,SP_REG,signal_int_run,SP_REG
# 记录保存现场的起点，以便恢复现场
last_sp = REG[SP_REG]
#print("Before INT",REG)
# 调用PUSH指令，将寄存器信息压入堆栈
for i in range(len(REG)):
ins = {};
ins['insName'] = "PUSH"; ins["op1"] = i + 1; ins["op2"] = "NULL"
ins_exec(ins)
MEM_DATA[last_sp+SP_REG+1] = last_sp
# 开始执行中断程序，设置中断代码运行信号有效
signal_int_run = True
# 恢复现场
def recover_scene():
global MEM_DATA,REG,last_sp,SP_REG,signal_int_happen,signal_int_run
# 将中断出现信号置无效
signal_int_happen = False
# 将寄存器信息重新返回
sp = last_sp
for i in range(len(REG)):
REG[i] = MEM_DATA[sp+i + 1]
# print(sp,sp+i,MEM_DATA[sp+i])
# 关闭中断程序，设置中断运行信号无效
#print("After INT",REG)
signal_int_run = False
output("Interrupt End")
# 封装了一个在显示区输出字符串的函数
def output(str):
label_output.append(str)
# 控制器
def VM_run():
global MEM_CODE,REG,PC_REG,signal_jmp,signal_pause,signal_onestep,mutex_one,frequency,signal_int_run,last_sp
global SP_REG,MEM_DATA,INT_VECTOR,INT_NUMBER,CC_REG,is_end,signal_iret
global error_happen,signal_int_run
currentIns = MEM_CODE[REG[PC_REG]]
while (currentIns['insName'] != 'HLT' and not is_end):
# 阻塞更新接口线程
GLib.idle_add(update)
#if (signal_int_run):
# print("INT runnning:",REG)
# 处理单步执行信号，并保证中途退出能够关闭界面
while (signal_onestep and not mutex_one):
print("")
if (is_end):
break
mutex_one = False
# 处理暂停信号，并保证中途退出能够关闭界面
while (signal_pause):
print("")
if (is_end):
break
# 在多步执行模式下，调节延时，以估计虚拟机运行频率
if (not signal_onestep and not signal_pause):
time.sleep(frequency)
#if (True):
# print("Currentins: ",currentIns)
# print("PC:",REG[PC_REG])
# 执行指令
ins_exec(currentIns)
# 根据跳转信号，更新PC
if (not signal_jmp):
REG[PC_REG] = REG[PC_REG] + 1
if (signal_iret):
REG[PC_REG] = REG[PC_REG] - 1
signal_iret = False
signal_jmp = False
# 读取下一条指令
currentIns = MEM_CODE[REG[PC_REG]]
if (signal_int_happen and not signal_int_run):
output("Begin Interrupt")
sp = REG[SP_REG]
save_scene()
# 初始化中断代码的寄存器信息
for i in range(len(REG)):
REG[i] = 0
REG[SP_REG] = sp + len(REG) + 1
REG[PC_REG] = INT_VECTOR[INT_NUMBER] - LEN_MEM_DATA - 1
currentIns = MEM_CODE[REG[PC_REG]]
output("<span color=\"green\">Program Finished.</span>")
update()
#Gtk.main_quit()
# 解析条件码寄存器，由于Simple-VM只有三个条件码，因此直接用十进制作为模拟，110表示前两个条件码有效，以此类推
def extractCC(N):
return [((N//100)%10),((N//10)%10),N%10]
# 运算器，负责执行单条指令
def ins_exec(Ins):
global REG,MEM_DATA,SP_REG,PC_REG,signal_jmp,CC_REG,error_happen,LEN_MEM_DATA,LEN_MEM_CODE,POS_STACK
# 解析指令，获取指令名与操作数
insName = Ins['insName']
op1 = Ins['op1']
op2 = Ins['op2']
# 执行指令
if (insName == 'RRMOV'):
[s,d] = [int(op1), int(op2)]
if (d > len(REG) or s > len(REG) or d < 1 or s < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = REG[s - 1]
elif (insName == "NOP"):
pass
elif (insName == 'IRMOV'):
[s,d] = [int(op1), int(op2)]
if (d > len(REG) or d < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = s
elif (insName == 'RMMOV'):
[s,d] = [int(op1), REG[int(op2) - 1]]
if (s > len(REG) or d > LEN_MEM_DATA or d < 0 or s < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
MEM_DATA[d] = REG[s - 1]
elif (insName == 'MRMOV'):
[s,d] = [REG[int(op1) - 1], int(op2)]
if (d > len(REG) or s > LEN_MEM_DATA or s < 0 or d < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = MEM_DATA[s]
elif (insName == 'PUSH'):
s = int(op1)
if (s > len(REG) or s < 1):
output("<span color=\"red\">Address Overflow</span>")
elif (REG[SP_REG] >= LEN_MEM_DATA or REG[SP_REG] < POS_STACK - 1):
output("<span color=\"red\">Stack Overflow</span>")
else:
REG[SP_REG] = REG[SP_REG] + 1
MEM_DATA[REG[SP_REG]] = REG[s - 1]
elif (insName == 'POP'):
d = int(op1)
if (d > len(REG) or d < 1):
output("<span color=\"red\">Address Overflow</span>")
elif (REG[SP_REG] >= LEN_MEM_DATA or REG[SP_REG] < POS_STACK):
output("<span color=\"red\">Stack Overflow</span>")
else:
REG[d - 1] = MEM_DATA[REG[SP_REG]]
REG[SP_REG] = REG[SP_REG] - 1
elif (insName == 'INC'):
d = int(op1)
if (d > len(REG) or d < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = REG[d - 1] + 1
elif (insName == 'DEC'):
d = int(op1)
if (d > len(REG) or d < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = REG[d - 1] - 1
elif (insName == 'ADD'):
[s,d] = [int(op1), int(op2)]
if (d > len(REG) or s > len(REG) or d < 1 or s < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = REG[d - 1] + REG[s - 1]
elif (insName == 'SUB'):
[s,d] = [int(op1), int(op2)]
if (d > len(REG) or s > len(REG) or d < 1 or s < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = REG[d - 1] - REG[s - 1]
elif (insName == 'IMUL'):
[s,d] = [int(op1), int(op2)]
if (d > len(REG) or s > len(REG) or d < 1 or s < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = REG[d - 1] * REG[s - 1]
elif (insName == 'DIV'):
[s,d] = [int(op1), int(op2)]
if (d > len(REG) or s > len(REG) or d < 1 or s < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = REG[d - 1] / REG[s - 1]
elif (insName == "NOT"):
d = int(op1)
if (d > len(REG) or d < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = ~REG[d - 1]
elif (insName == "XOR"):
[s,d] = [int(op1), int(op2)]
if (d > len(REG) or s > len(REG) or d < 1 or s < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = REG[d - 1] ^ REG[s - 1]
elif (insName == "OR"):
[s,d] = [int(op1), int(op2)]
if (d > len(REG) or s > len(REG) or d < 1 or s < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = REG[d - 1]|REG[s - 1]
elif (insName == "AND"):
[s,d] = [int(op1), int(op2)]
if (d > len(REG) or s > len(REG) or d < 1 or s < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = REG[d - 1]®[s - 1]
elif (insName == "SAL"):
[s,d] = [int(op1), int(op2)]
if (d > len(REG) or s > len(REG) or d < 1 or s < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = REG[d - 1] << s
elif (insName == "SAR"):
[k,d] = [int(op1), int(op2)]
if (d > len(REG) or s > len(REG) or d < 1 or s < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[d - 1] = REG[d - 1] >> k
elif (insName == "JMP"):
addr = int(op1)
if (addr < 0 or addr > LEN_MEM_CODE):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[PC_REG] = addr
signal_jmp = True
elif (insName == "JE"):
addr = int(op1)
CZ,LZ,GZ = extractCC(REG[CC_REG])
if (CZ == 1):
if (addr < 0 or addr > LEN_MEM_CODE):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[PC_REG] = addr
signal_jmp = True
elif (insName == "JNE"):
addr = int(op1)
CZ,LZ,GZ = extractCC(REG[CC_REG])
if (CZ == 0):
if (addr < 0 or addr > LEN_MEM_CODE):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[PC_REG] = addr
signal_jmp = True
elif (insName == "JL"):
addr = int(op1)
CZ,LZ,GZ = extractCC(REG[CC_REG])
if (LZ == 1):
if (addr < 0 or addr > LEN_MEM_CODE):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[PC_REG] = addr
signal_jmp = True
elif (insName == "JLE"):
addr = int(op1)
CZ,LZ,GZ = extractCC(REG[CC_REG])
if (LZ == 1 or CZ == 1):
if (addr < 0 or addr > LEN_MEM_CODE):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[PC_REG] = addr
signal_jmp = True
elif (insName == "JG"):
addr = int(op1)
CZ,LZ,GZ = extractCC(REG[CC_REG])
if (GZ == 1):
if (addr < 0 or addr > LEN_MEM_CODE):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[PC_REG] = addr
signal_jmp = True
elif (insName == "JGE"):
addr = int(op1)
CZ,LZ,GZ = extractCC(REG[CC_REG])
if (GZ == 1 or CZ == 1):
if (addr < 0 or addr > LEN_MEM_CODE):
output("<span color=\"red\">Address Overflow</span>")
else:
REG[PC_REG] = addr
signal_jmp = True
elif (insName == "CMP"):
[s,d] = [int(op1), int(op2)]
if (d > len(REG) or s > len(REG) or d < 1 or s < 1):
output("<span color=\"red\">Address Overflow</span>")
else:
if (REG[d-1] - REG[s-1] == 0):
REG[CC_REG] = 100
elif (REG[d-1] - REG[s-1] < 0):
REG[CC_REG] = 10
elif (REG[d-1] - REG[s-1] > 0):
REG[CC_REG] = 1
elif (insName == "MOUT"):
d = int(op1)
if (d > len(REG) or d < 1 or REG[d-1] > LEN_MEM_DATA or REG[d-1] < 0) :
output("<span color=\"red\">Address Overflow</span>")
else:
output("<span color=\"blue\">"+str(MEM_DATA[REG[d-1]])+"</span>")
elif (insName == "INPUT"):