8269685: Optimize HeapHprofBinWriter implementation

8262386: resourcehogs/serviceability/sa/TestHeapDumpForLargeArray.java timed out

Reviewed-by: sspitsyn, amenkov

Author: Lin Zang

src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/utilities/AbstractHeapGraphWriter.java

@@ -59,7 +59,7 @@ public void prologue(long usedSize) {
 
                     public boolean doObj(Oop oop) {
                         try {
-                            writeHeapRecordPrologue();
+                            writeHeapRecordPrologue(calculateOopDumpRecordSize(oop));
                             if (oop instanceof TypeArray) {
                                 writePrimitiveArray((TypeArray)oop);
                             } else if (oop instanceof ObjArray) {
@@ -127,6 +127,8 @@ public void epilogue() {
         }
     }
 
+    abstract protected int calculateOopDumpRecordSize(Oop oop) throws IOException;
+
     protected void writeJavaThreads() throws IOException {
         Threads threads = VM.getVM().getThreads();
         for (int i = 0; i < threads.getNumberOfThreads(); i++) {
@@ -420,6 +422,9 @@ protected void writeHeapFooter() throws IOException {
     protected void writeHeapRecordPrologue() throws IOException {
     }
 
+    protected void writeHeapRecordPrologue(int size) throws IOException {
+    }
+
     protected void writeHeapRecordEpilogue() throws IOException {
     }
 

src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/utilities/HeapGXLWriter.java

@@ -275,6 +275,11 @@ protected void writeHeapFooter() throws IOException  {
         out.println("</gxl>");
     }
 
+    @Override
+    protected int calculateOopDumpRecordSize(Oop oop) throws IOException {
+        return 0;
+    }
+
     //-- Internals only below this point
 
     // Java identifier to XML NMTOKEN type string