# HG changeset patch
# User dsamersoff
# Date 1457945115 -10800
# Node ID e152767075cee992065cd4b43675935ad225a26a
# Parent  8776e46aa54202556be9cef1e0a27a322c0c7043
8151368: SA: Unexpected ArithmeticException in CompactHashTable
Summary: Add missed null check
Reviewed-by: iklam, dsamersoff
Contributed-by: kubota.yuji@gmail.com

diff -r 8776e46aa542 -r e152767075ce hotspot/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/utilities/CompactHashTable.java
--- a/hotspot/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/utilities/CompactHashTable.java	Sun Mar 13 19:41:11 2016 +0000
+++ b/hotspot/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/utilities/CompactHashTable.java	Mon Mar 14 11:45:15 2016 +0300
@@ -81,6 +81,12 @@
   }
 
   public Symbol probe(byte[] name, long hash) {
+
+    if (bucketCount() == 0) {
+      // The table is invalid, so don't try to lookup
+      return null;
+    }
+
     long    symOffset;
     Symbol  sym;
     Address baseAddress = baseAddressField.getValue(addr);