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fix bug execute <clinit>

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wangxiang
2023-07-21 16:21:36 +08:00
parent 05affb1a80
commit f360ac0e3f
4 changed files with 20 additions and 45 deletions
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31
src/main/java/haidnor/jvm/classloader/ClassLoader.java
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@@ -1,12 +1,8 @@
package haidnor.jvm.classloader;
import haidnor.jvm.core.JavaExecutionEngine;
import haidnor.jvm.rtda.heap.Klass;
import haidnor.jvm.rtda.heap.KlassMethod;
import haidnor.jvm.rtda.metaspace.Metaspace;
import org.apache.bcel.classfile.ClassParser;
import org.apache.bcel.classfile.JavaClass;
import org.apache.bcel.classfile.Method;
import java.io.File;
import java.io.FileInputStream;
@@ -63,36 +59,13 @@ public class ClassLoader {
}
JavaClass javaClass = classParser.parse();
Klass klass = new Klass(this, javaClass);
Metaspace.registerJavaClass(klass);
if (!classPath.startsWith("java/")) {
// do clinit
for (Method method : javaClass.getMethods()) {
if (method.toString().equals("static void <clinit>()")) {
KlassMethod klassMethod = new KlassMethod(klass, method);
JavaExecutionEngine.callMethod(null, klassMethod);
break;
}
}
}
return klass;
return new Klass(this, javaClass);
}
public Klass loadClassWithAbsolutePath(String absolutePath) throws IOException {
ClassParser classParser = new ClassParser(absolutePath);
JavaClass javaClass = classParser.parse();
Klass klass = new Klass(this, javaClass);
Metaspace.registerJavaClass(klass);
// do clinit
for (Method method : javaClass.getMethods()) {
if (method.toString().equals("static void <clinit>()")) {
KlassMethod klassMethod = new KlassMethod(klass, method);
JavaExecutionEngine.callMethod(null, klassMethod);
break;
}
}
return klass;
return new Klass(this, javaClass);
}
}

16
src/main/java/haidnor/jvm/rtda/heap/Klass.java
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@@ -1,9 +1,12 @@
package haidnor.jvm.rtda.heap;
import haidnor.jvm.classloader.ClassLoader;
import haidnor.jvm.core.JavaExecutionEngine;
import haidnor.jvm.rtda.metaspace.Metaspace;
import lombok.SneakyThrows;
import org.apache.bcel.classfile.Field;
import org.apache.bcel.classfile.JavaClass;
import org.apache.bcel.classfile.Method;
import java.util.ArrayList;
import java.util.HashMap;
@@ -53,6 +56,19 @@ public class Klass {
}
}
Metaspace.registerJavaClass(this);
// execute <clinit> method
if (!javaClass.getClassName().startsWith("java.")) {
for (Method method : javaClass.getMethods()) {
if (method.toString().equals("static void <clinit>()")) {
KlassMethod klassMethod = new KlassMethod(this, method);
JavaExecutionEngine.callMethod(null, klassMethod);
break;
}
}
}
// loader super class
JavaClass superJavaClass = javaClass.getSuperClass();
if (superJavaClass != null) {

12
src/test/java/haidnor/jvm/test/clazz/Student.java
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@@ -1,17 +1,5 @@
package haidnor.jvm.test.clazz;
public class Student extends Human {
public static String school = "家里蹲大学";
public String name;
public void printSchool() {
System.out.println(school);
}
public static Student newStudent() {
return new Student();
}
}

6
src/test/java/haidnor/jvm/test/demo/Demo4.java
View File

@@ -5,10 +5,8 @@ import haidnor.jvm.test.clazz.Student;
public class Demo4 {
public static void main(String[] args) {
Student student = Student.newStudent();
student.eat();
student.name = "张三";
System.out.println(student.name);
Student student = new Student();
System.out.println(Student.school);
}
}