--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/interpreter/BytecodeDisassembler.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,169 @@
+/*
+ * Copyright 2002 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package sun.jvm.hotspot.interpreter;
+
+import java.util.*;
+import java.lang.reflect.Constructor;
+import sun.jvm.hotspot.oops.*;
+import sun.jvm.hotspot.utilities.*;
+
+public class BytecodeDisassembler {
+   private Method method;
+
+   private static Map bytecode2Class = new HashMap(); // Map<int, Class>
+
+   private static void addBytecodeClass(int bytecode, Class clazz) {
+      bytecode2Class.put(new Integer(bytecode), clazz);
+   }
+
+   private static Class getBytecodeClass(int bytecode) {
+      return (Class) bytecode2Class.get(new Integer(bytecode));
+   }
+
+   static {
+      addBytecodeClass(Bytecodes._anewarray, BytecodeANewArray.class);
+      addBytecodeClass(Bytecodes._bipush, BytecodeBipush.class);
+      addBytecodeClass(Bytecodes._checkcast, BytecodeCheckCast.class);
+      addBytecodeClass(Bytecodes._getfield, BytecodeGetField.class);
+      addBytecodeClass(Bytecodes._getstatic, BytecodeGetStatic.class);
+      addBytecodeClass(Bytecodes._goto, BytecodeGoto.class);
+      addBytecodeClass(Bytecodes._goto_w, BytecodeGotoW.class);
+      addBytecodeClass(Bytecodes._ifeq, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._ifne, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._iflt, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._ifge, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._ifgt, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._ifle, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._if_icmpeq, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._if_icmpne, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._if_icmplt, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._if_icmpge, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._if_icmpgt, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._if_icmple, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._if_acmpeq, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._if_acmpne, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._ifnull, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._ifnonnull, BytecodeIf.class);
+      addBytecodeClass(Bytecodes._iinc, BytecodeIinc.class);
+      addBytecodeClass(Bytecodes._instanceof, BytecodeInstanceOf.class);
+      addBytecodeClass(Bytecodes._invokevirtual, BytecodeInvoke.class);
+      addBytecodeClass(Bytecodes._invokestatic, BytecodeInvoke.class);
+      addBytecodeClass(Bytecodes._invokespecial, BytecodeInvoke.class);
+      addBytecodeClass(Bytecodes._invokeinterface, BytecodeInvoke.class);
+      addBytecodeClass(Bytecodes._jsr, BytecodeJsr.class);
+      addBytecodeClass(Bytecodes._jsr_w, BytecodeJsrW.class);
+      addBytecodeClass(Bytecodes._iload, BytecodeLoad.class);
+      addBytecodeClass(Bytecodes._lload, BytecodeLoad.class);
+      addBytecodeClass(Bytecodes._fload, BytecodeLoad.class);
+      addBytecodeClass(Bytecodes._dload, BytecodeLoad.class);
+      addBytecodeClass(Bytecodes._aload, BytecodeLoad.class);
+      addBytecodeClass(Bytecodes._ldc,   BytecodeLoadConstant.class);
+      addBytecodeClass(Bytecodes._ldc_w, BytecodeLoadConstant.class);
+      addBytecodeClass(Bytecodes._ldc2_w, BytecodeLoadConstant.class);
+      addBytecodeClass(Bytecodes._lookupswitch, BytecodeLookupswitch.class);
+      addBytecodeClass(Bytecodes._multianewarray, BytecodeMultiANewArray.class);
+      addBytecodeClass(Bytecodes._new, BytecodeNew.class);
+      addBytecodeClass(Bytecodes._newarray, BytecodeNewArray.class);
+      addBytecodeClass(Bytecodes._putfield, BytecodePutField.class);
+      addBytecodeClass(Bytecodes._putstatic, BytecodePutStatic.class);
+      addBytecodeClass(Bytecodes._ret, BytecodeRet.class);
+      addBytecodeClass(Bytecodes._sipush, BytecodeSipush.class);
+      addBytecodeClass(Bytecodes._istore, BytecodeStore.class);
+      addBytecodeClass(Bytecodes._lstore, BytecodeStore.class);
+      addBytecodeClass(Bytecodes._fstore, BytecodeStore.class);
+      addBytecodeClass(Bytecodes._dstore, BytecodeStore.class);
+      addBytecodeClass(Bytecodes._astore, BytecodeStore.class);
+      addBytecodeClass(Bytecodes._tableswitch, BytecodeTableswitch.class);
+
+      // only special fast_xxx cases. others are handled differently.
+      addBytecodeClass(Bytecodes._fast_iaccess_0, BytecodeFastAAccess0.class);
+      addBytecodeClass(Bytecodes._fast_aaccess_0, BytecodeFastIAccess0.class);
+   }
+
+   public BytecodeDisassembler(Method method) {
+      this.method = method;
+   }
+
+   public Method getMethod() {
+      return method;
+   }
+
+   public void decode(BytecodeVisitor visitor) {
+      visitor.prologue(method);
+
+      BytecodeStream stream = new BytecodeStream(method);
+      int javacode = Bytecodes._illegal;
+      while ( (javacode = stream.next()) != Bytecodes._illegal) {
+         // look for special Bytecode class
+         int bci = stream.bci();
+         int hotspotcode = method.getBytecodeOrBPAt(bci);
+         Class clazz = getBytecodeClass(javacode);
+         if (clazz == null) {
+            // check for fast_(i|a)_access_0
+            clazz = getBytecodeClass(hotspotcode);
+            if (clazz == null) {
+               // use generic bytecode class
+               clazz = Bytecode.class;
+            }
+         }
+
+         // All bytecode classes must have a constructor with signature
+         // (Lsun/jvm/hotspot/oops/Method;I)V
+
+         Constructor cstr = null;
+         try {
+            cstr = clazz.getDeclaredConstructor(new Class[] { Method.class, Integer.TYPE });
+         } catch(NoSuchMethodException nomethod) {
+            if (Assert.ASSERTS_ENABLED) {
+               Assert.that(false, "Bytecode class without proper constructor!");
+            }
+         }
+
+         Object bytecodeObj = null;
+         try {
+            bytecodeObj = cstr.newInstance(new Object[] { method, new Integer(bci) });
+         } catch (Exception exp) {
+            if (Assert.ASSERTS_ENABLED) {
+               Assert.that(false, "Bytecode instance of class "
+                           + clazz.getName() + " can not be created!");
+            }
+         }
+
+         if (stream.isWide()) {
+            visitor.visit(new Bytecode(method, bci - 1));
+         }
+
+         try {
+            visitor.visit((Bytecode) bytecodeObj);
+         } catch(ClassCastException castfail) {
+            if (Assert.ASSERTS_ENABLED) {
+               Assert.that(false, clazz.getName() + " is not derived from Bytecode!");
+            }
+         }
+      }
+
+      visitor.epilogue();
+   }
+}