jvm执行引擎初步

group02/812350401/.gitignore

@@ -1,7 +1,5 @@
 target/
 .idea/
-src/main/java/train/
 !src/main/resources/**/*.class
 !src/main/resources/**/*.xml
 src/main/resources/**/*.png
-src/main/java/assignments

group02/812350401/src/main/java/com/github/miniyk2012/coding2017/coderising/jvm/attr/CodeAttr.java

@@ -89,7 +89,7 @@ public String toString(ConstantPool pool){
 		StringBuilder buffer = new StringBuilder();
 		buffer.append("Code:").append(code).append("\n");
 		for(int i=0;i<cmds.length;i++){
-			buffer.append(cmds[i].toString(pool)).append("\n");
+			buffer.append(cmds[i].toString()).append("\n");
 		}
 		buffer.append("\n");
 		buffer.append(this.lineNumTable.toString());

group02/812350401/src/main/java/com/github/miniyk2012/coding2017/coderising/jvm/cmd/BiPushCmd.java

@@ -2,7 +2,8 @@
 
 
 import com.github.miniyk2012.coding2017.coderising.jvm.clz.ClassFile;
-import com.github.miniyk2012.coding2017.coderising.jvm.constant.ConstantPool;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.ExecutionResult;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.StackFrame;
 
 public class BiPushCmd extends OneOperandCmd {
 
@@ -12,11 +13,15 @@ public BiPushCmd(ClassFile clzFile, String opCode) {
 	}
 
 	@Override
-	public String toString(ConstantPool pool) {
+	public String toString() {
 
 		return this.getOffset()+": "+ this.getOpCode()+" " + this.getReadableCodeText() + " " + this.getOperand();
 	}
-
-
+
+	@Override
+	public void execute(StackFrame frame, ExecutionResult result) {
+
+	}
+
 
 }

group02/812350401/src/main/java/com/github/miniyk2012/coding2017/coderising/jvm/cmd/ByteCodeCommand.java

@@ -3,6 +3,8 @@
 import com.github.miniyk2012.coding2017.coderising.jvm.clz.ClassFile;
 import com.github.miniyk2012.coding2017.coderising.jvm.constant.ConstantInfo;
 import com.github.miniyk2012.coding2017.coderising.jvm.constant.ConstantPool;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.ExecutionResult;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.StackFrame;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -109,15 +111,18 @@ public String toString(){
 		return buffer.toString();
 	}
 
-	public abstract String toString(ConstantPool pool);
-
 	public String getReadableCodeText(){
 		String txt = codeMap.get(opCode);
 		if(txt == null){
 			throw new RuntimeException("codeMap don't contain: " + opCode);
 		}
 		return txt;
 	}
-
-	//public abstract void execute(StackFrame frame,FrameResult result);
+
+    /**
+     * 每个命令都要实现自己的功能
+     * @param frame 命令执行过程中需要访问函数栈帧中的操作数栈和局部变量表，因此把frame传入
+     * @param result
+     */
+    public abstract void execute(StackFrame frame, ExecutionResult result);
 }

group02/812350401/src/main/java/com/github/miniyk2012/coding2017/coderising/jvm/cmd/GetFieldCmd.java

@@ -2,7 +2,8 @@
 
 
 import com.github.miniyk2012.coding2017.coderising.jvm.clz.ClassFile;
-import com.github.miniyk2012.coding2017.coderising.jvm.constant.ConstantPool;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.ExecutionResult;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.StackFrame;
 
 public class GetFieldCmd extends TwoOperandCmd {
 
@@ -11,12 +12,15 @@ public GetFieldCmd(ClassFile clzFile, String opCode) {
 	}
 
 	@Override
-	public String toString(ConstantPool pool) {
+	public String toString() {
 
-		return super.getOperandAsField(pool);
+		return super.getOperandAsField();
+	}
+
+	@Override
+	public void execute(StackFrame frame, ExecutionResult result) {
+
 	}
 
-
-
 
 }

group02/812350401/src/main/java/com/github/miniyk2012/coding2017/coderising/jvm/cmd/GetStaticFieldCmd.java

@@ -3,6 +3,8 @@
 
 import com.github.miniyk2012.coding2017.coderising.jvm.clz.ClassFile;
 import com.github.miniyk2012.coding2017.coderising.jvm.constant.ConstantPool;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.ExecutionResult;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.StackFrame;
 
 public class GetStaticFieldCmd extends TwoOperandCmd {
 
@@ -12,9 +14,14 @@ public GetStaticFieldCmd(ClassFile clzFile, String opCode) {
 	}
 
 	@Override
-	public String toString(ConstantPool pool) {
+	public String toString() {
 
-		return super.getOperandAsField(pool);
+		return super.getOperandAsField();
+	}
+
+	@Override
+	public void execute(StackFrame frame, ExecutionResult result) {
+
 	}
 
 }

group02/812350401/src/main/java/com/github/miniyk2012/coding2017/coderising/jvm/cmd/IncrementCmd.java

@@ -0,0 +1,26 @@
+package com.github.miniyk2012.coding2017.coderising.jvm.cmd;
+
+
+import com.github.miniyk2012.coding2017.coderising.jvm.clz.ClassFile;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.ExecutionResult;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.StackFrame;
+
+public class IncrementCmd extends TwoOperandCmd {
+
+	public IncrementCmd(ClassFile clzFile, String opCode) {
+		super(clzFile, opCode);
+
+	}
+
+	@Override
+	public String toString() {
+
+		return this.getOffset()+":"+this.getOpCode()+ " " +this.getReadableCodeText();
+	}
+
+	@Override
+	public void execute(StackFrame frame, ExecutionResult result) {
+		return;
+	}
+
+}

group02/812350401/src/main/java/com/github/miniyk2012/coding2017/coderising/jvm/cmd/InvokeSpecialCmd.java

@@ -2,21 +2,28 @@
 
 
 import com.github.miniyk2012.coding2017.coderising.jvm.clz.ClassFile;
-import com.github.miniyk2012.coding2017.coderising.jvm.constant.ConstantPool;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.ExecutionResult;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.StackFrame;
 
+/**
+ * 调用实例初始化方法
+ */
 public class InvokeSpecialCmd extends TwoOperandCmd {
 
 	public InvokeSpecialCmd(ClassFile clzFile, String opCode) {
 		super(clzFile,opCode);
-
 	}
 
 	@Override
-	public String toString(ConstantPool pool) {
+	public String toString() {
 
-		return super.getOperandAsMethod(pool);
+		return super.getOperandAsMethod();
+	}
+
+	@Override
+	public void execute(StackFrame frame, ExecutionResult result) {
+
 	}
 
-
 
 }

group02/812350401/src/main/java/com/github/miniyk2012/coding2017/coderising/jvm/cmd/InvokeVirtualCmd.java

@@ -2,21 +2,29 @@
 
 
 import com.github.miniyk2012.coding2017.coderising.jvm.clz.ClassFile;
-import com.github.miniyk2012.coding2017.coderising.jvm.constant.ConstantPool;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.ExecutionResult;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.StackFrame;
 
+
+/**
+ * 调用实例方法
+ */
 public class InvokeVirtualCmd extends TwoOperandCmd {
 
 	public InvokeVirtualCmd(ClassFile clzFile, String opCode) {
 		super(clzFile,opCode);
 	}
 
 	@Override
-	public String toString(ConstantPool pool) {
+	public String toString() {
 
-		return super.getOperandAsMethod(pool);
+		return super.getOperandAsMethod();
+	}
+
+	@Override
+	public void execute(StackFrame frame, ExecutionResult result) {
+
 	}
 
-
-
 
 }

group02/812350401/src/main/java/com/github/miniyk2012/coding2017/coderising/jvm/cmd/LdcCmd.java

@@ -3,19 +3,28 @@
 
 import com.github.miniyk2012.coding2017.coderising.jvm.clz.ClassFile;
 import com.github.miniyk2012.coding2017.coderising.jvm.constant.ConstantInfo;
-import com.github.miniyk2012.coding2017.coderising.jvm.constant.ConstantPool;
 import com.github.miniyk2012.coding2017.coderising.jvm.constant.StringInfo;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.ExecutionResult;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.Heap;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.JavaObject;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.StackFrame;
 
+
+/**
+ * 如果运行时常量池项是一个 int 或者 float 类型的运行时常量，则将对应的数值 value 将被压入到操作数栈之中(暂时不处理)。
+ * 如果运行时常量池项是一个代表字符串字面量的 String 类的引用，那这个实例的引用所对应的 reference 类型数据
+ * value 将被压入 到操作数栈之中。
+ */
 public class LdcCmd extends OneOperandCmd {
 
 	public LdcCmd(ClassFile clzFile, String opCode) {
 		super(clzFile,opCode);		
 	}
 
 	@Override
-	public String toString(ConstantPool pool) {
+	public String toString() {
 
-		ConstantInfo info = pool.getConstantInfo(this.getOperand());
+		ConstantInfo info = getConstantInfo(this.getOperand());
 
 		String value = "TBD";
 		if(info instanceof StringInfo){
@@ -26,5 +35,19 @@ public String toString(ConstantPool pool) {
 		return this.getOffset()+":"+this.getOpCode()+" " + this.getReadableCodeText() + " "+  value;
 
 	}
-
+
+	@Override
+	public void execute(StackFrame frame, ExecutionResult result) {
+        ConstantInfo info = getConstantInfo(getOperand());
+        if (info instanceof StringInfo) {
+            StringInfo strInfo = (StringInfo)info;
+            String value = strInfo.toString();
+            JavaObject jo = Heap.getInstance().newString(value);
+            frame.getOprandStack().push(jo);
+            return;
+        }
+        // todo 处理其他类型（int 或者 float 类型）
+        throw new RuntimeException("Only support StringInfo constant");
+	}
+
 }

group02/812350401/src/main/java/com/github/miniyk2012/coding2017/coderising/jvm/cmd/NewObjectCmd.java

@@ -1,7 +1,11 @@
 package com.github.miniyk2012.coding2017.coderising.jvm.cmd;
 
 import com.github.miniyk2012.coding2017.coderising.jvm.clz.ClassFile;
-import com.github.miniyk2012.coding2017.coderising.jvm.constant.ConstantPool;
+import com.github.miniyk2012.coding2017.coderising.jvm.constant.ClassInfo;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.ExecutionResult;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.Heap;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.JavaObject;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.StackFrame;
 
 public class NewObjectCmd extends TwoOperandCmd{
 
@@ -10,10 +14,22 @@ public NewObjectCmd(ClassFile clzFile, String opCode){
 	}
 
 	@Override
-	public String toString(ConstantPool pool) {
-
-		return super.getOperandAsClassInfo(pool);
+	public String toString() {
+		return super.getOperandAsClassInfo();
 	}
 
-
+    /**
+     * 创建一个对象，并将其引用值压入栈顶。
+     * @param frame 命令执行过程中需要访问函数栈帧中的操作数栈和局部变量表，因此把frame传入
+     * @param result
+     */
+	@Override
+	public void execute(StackFrame frame, ExecutionResult result) {
+		int classIndex = getIndex();
+		String className = ((ClassInfo)getConstantInfo(classIndex)).getClassName();
+		JavaObject jo = Heap.getInstance().newObject(className);
+		frame.getOprandStack().push(jo);
+	}
+
+
 }

group02/812350401/src/main/java/com/github/miniyk2012/coding2017/coderising/jvm/cmd/NoOperandCmd.java

@@ -2,6 +2,8 @@
 
 import com.github.miniyk2012.coding2017.coderising.jvm.clz.ClassFile;
 import com.github.miniyk2012.coding2017.coderising.jvm.constant.ConstantPool;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.ExecutionResult;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.StackFrame;
 
 public class NoOperandCmd extends ByteCodeCommand{
 
@@ -10,12 +12,16 @@ public NoOperandCmd(ClassFile clzFile, String opCode) {
 	}
 
 	@Override
-	public String toString(ConstantPool pool) {
+	public String toString() {
 		return this.getOffset()+":" +this.getOpCode() + " "+ this.getReadableCodeText();
 	}
 
-
-
+	@Override
+	public void execute(StackFrame frame, ExecutionResult result) {
+
+	}
+
+
 	public  int getLength(){
 		return 1;
 	}

group02/812350401/src/main/java/com/github/miniyk2012/coding2017/coderising/jvm/cmd/PutFieldCmd.java

@@ -2,7 +2,8 @@
 
 
 import com.github.miniyk2012.coding2017.coderising.jvm.clz.ClassFile;
-import com.github.miniyk2012.coding2017.coderising.jvm.constant.ConstantPool;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.ExecutionResult;
+import com.github.miniyk2012.coding2017.coderising.jvm.engine.StackFrame;
 
 public class PutFieldCmd extends TwoOperandCmd {
 
@@ -11,8 +12,13 @@ public PutFieldCmd(ClassFile clzFile, String opCode) {
 	}
 
 	@Override
-	public String toString(ConstantPool pool) {
+	public String toString() {
 
-		return super.getOperandAsField(pool);
+		return super.getOperandAsField();
+	}
+
+	@Override
+	public void execute(StackFrame frame, ExecutionResult result) {
+
 	}
 }