agent/src/share/classes/sun/jvm/hotspot/debugger/DebuggerBase.java

rev 3688 : 7054512: Compress class pointers after perm gen removal
Summary: support of compress class pointers in the compilers.
Reviewed-by:

@@ -56,10 +56,14 @@
   // heap data.
   protected long oopSize;
   protected long heapOopSize;
   protected long narrowOopBase;  // heap base for compressed oops.
   protected int  narrowOopShift; // shift to decode compressed oops.
+  // class metadata space
+  protected long klassPtrSize;
+  protected long narrowKlassBase;  // heap base for compressed klass ptrs.
+  protected int  narrowKlassShift; // shift to decode compressed klass ptrs.
   // Should be initialized if desired by calling initCache()
   private PageCache cache;
 
   // State for faster accessors that don't allocate memory on each read
   private boolean useFastAccessors;

@@ -157,14 +161,18 @@
        (jshortSize   == 2));
 
     javaPrimitiveTypesConfigured = true;
   }
 
-  public void putHeapConst(long heapOopSize, long narrowOopBase, int narrowOopShift) {
+  public void putHeapConst(long heapOopSize, long klassPtrSize, long narrowOopBase, int narrowOopShift, 
+                           long narrowKlassBase, int narrowKlassShift) {
     this.heapOopSize = heapOopSize;
+    this.klassPtrSize = klassPtrSize;
     this.narrowOopBase = narrowOopBase;
     this.narrowOopShift = narrowOopShift;
+    this.narrowKlassBase = narrowKlassBase;
+    this.narrowKlassShift = narrowKlassShift;
   }
 
   /** May be called by subclasses if desired to initialize the page
       cache but may not be overridden */
   protected final void initCache(long pageSize, long maxNumPages) {

@@ -462,10 +470,19 @@
       value = (long)(narrowOopBase + (long)(value << narrowOopShift));
     }
     return value;
   }
 
+  protected long readCompKlassAddressValue(long address)
+    throws UnmappedAddressException, UnalignedAddressException {
+    long value = readCInteger(address, getKlassPtrSize(), true);
+    if (value != 0) {
+      value = (long)(narrowKlassBase + (long)(value << narrowKlassShift));
+    }
+    return value;
+  }
+
   protected void writeAddressValue(long address, long value)
     throws UnmappedAddressException, UnalignedAddressException {
     writeCInteger(address, machDesc.getAddressSize(), value);
   }
 

@@ -549,6 +566,17 @@
     return narrowOopBase;
   }
   public int getNarrowOopShift() {
     return narrowOopShift;
   }
+
+  public long getKlassPtrSize() {
+    return klassPtrSize;
+  }
+
+  public long getNarrowKlassBase() {
+    return narrowKlassBase;
+  }
+  public int getNarrowKlassShift() {
+    return narrowKlassShift;
+  }
 }