Fixing the ClassLoader.defineClass() method issue that could not find the necessary...

[jpf-core.git] / examples / SunClassLoader.java

diff --git a/examples/SunClassLoader.java b/examples/SunClassLoader.java
new file mode 100644 (file)
index 0000000..195c3a6
--- /dev/null
+++ b/examples/SunClassLoader.java
@@ -0,0 +1,38 @@
+import org.objectweb.asm.Opcodes;
+import org.objectweb.asm.ClassWriter;
+import org.objectweb.asm.MethodVisitor;
+
+import java.util.Map;
+import java.util.HashMap;
+
+/**
+ * Special class loader, which when running on Sun VM allows to generate accessor classes for any method
+ */
+public class SunClassLoader extends ClassLoader implements Opcodes {
+    private void loadMagic() {
+        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
+        cw.visit(Opcodes.V1_4, Opcodes.ACC_PUBLIC, "sun/reflect/GroovyMagic", null, "sun/reflect/MagicAccessorImpl", null);
+        MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
+        mv.visitCode();
+        mv.visitVarInsn(ALOAD, 0);
+        mv.visitMethodInsn(INVOKESPECIAL, "sun/reflect/MagicAccessorImpl", "<init>", "()V", false);
+        mv.visitInsn(RETURN);
+        mv.visitMaxs(0,0);
+        mv.visitEnd();
+        cw.visitEnd();
+
+        define(cw.toByteArray(), "sun.reflect.GroovyMagic");
+    }
+
+    protected void define(byte[] bytes, final String name) {
+        //knownClasses.put(name, defineClass(name, bytes, 0, bytes.length));
+        Class cls = defineClass(name, bytes, 0, bytes.length);
+    }
+
+    protected final Map<String,Class> knownClasses = new HashMap<String,Class>();
+
+    public static void main(String[] args) {
+        SunClassLoader sun = new SunClassLoader();
+        sun.loadMagic();
+    }
+}