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upd JavaExecutionEngine

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wangxiang
2023-10-25 15:25:04 +08:00
parent 82348cee01
commit 4ed66bc553
2 changed files with 13 additions and 13 deletions
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16
src/main/java/haidnor/jvm/core/JavaExecutionEngine.java
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@@ -35,25 +35,25 @@ public class JavaExecutionEngine {
* 执行普通方法
*
* @param lastFrame 方法调用者的栈帧
* @param javaMethod 方法元信息
* @param method 方法元信息
*/
public static void callMethod(Frame lastFrame, JavaMethod javaMethod) {
JVMThread jvmThread = JVMThreadHolder.get();
public static void callMethod(Frame lastFrame, JavaMethod method) {
JVMThread thread = JVMThreadHolder.get();
// 调用方法时会创建新的栈帧
Frame newFrame = new Frame(jvmThread, javaMethod);
Frame newFrame = new Frame(thread, method);
// 如果线程栈内存在栈帧, 代表可能需要方法调用传参
if (lastFrame != null) {
String signature = javaMethod.getSignature();
String signature = method.getSignature();
String[] argumentTypes = Utility.methodSignatureArgumentTypes(signature);
int argumentSlotSize = argumentTypes.length;
if (!javaMethod.isStatic()) {
if (!method.isStatic()) {
argumentSlotSize++;
}
// 方法调用传参 (原理: 将顶部栈帧的操作数栈中的数据弹出, 存入新栈帧的局部变量表中)
LocalVariableTable localVariableTable = javaMethod.getLocalVariableTable();
LocalVariableTable localVariableTable = method.getLocalVariableTable();
if (localVariableTable != null) {
for (int i = argumentSlotSize - 1; i >= 0; i--) {
LocalVariable[] localVariableArr = localVariableTable.getLocalVariableTable();
@@ -66,7 +66,7 @@ public class JavaExecutionEngine {
}
// 将新栈帧压入线程栈顶部, 并执行新栈帧中的代码
jvmThread.push(newFrame);
thread.push(newFrame);
executeFrame(newFrame);
}

10
src/main/java/haidnor/jvm/runtime/Frame.java
View File

@@ -51,12 +51,12 @@ public class Frame {
*/
private final Slot[] slots;
public Frame(JVMThread thread, JavaMethod javaMethod) {
public Frame(JVMThread thread, JavaMethod method) {
this.jvmThread = thread;
this.javaClass = javaMethod.getJavaClass();
this.javaMethod = javaMethod;
this.code = javaMethod.getCode();
this.codeStream = new CodeStream(javaMethod.getCode());
this.javaClass = method.getJavaClass();
this.javaMethod = method;
this.code = method.getCode();
this.codeStream = new CodeStream(method.getCode());
this.slots = new Slot[code.getMaxLocals()];
}