File PStack-808293.patch of Package java-9-openjdk

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File PStack-808293.patch of Package java-9-openjdk (Revision d9880f85a7ab4e5a4abd325a8752a97c)

Currently displaying revision d9880f85a7ab4e5a4abd325a8752a97c , Show latest

--- jdk9/hotspot/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/tools/PStack.java	2016-01-21 19:16:09.000000000 +0100
+++ jdk9/hotspot/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/tools/PStack.java	2016-01-29 15:49:47.815913736 +0100
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, Red Hat Inc.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -88,7 +89,8 @@
                out.print("----------------- ");
                out.print(th);
                out.println(" -----------------");
-               while (f != null) {
+               int maxStack = 256;
+               while (f != null && maxStack-- > 0) {
                   ClosestSymbol sym = f.closestSymbolToPC();
                   Address pc = f.pc();
                   out.print(pc + "\t");
@@ -158,10 +160,19 @@
                          }
                       }
                   }
+                  Address oldPC = f.pc();
+                  Address oldFP = f.localVariableBase();
                   f = f.sender(th);
+                  if (f != null
+                      && oldPC.equals(f.pc())
+                      && oldFP.equals(f.localVariableBase())) {
+                      // We didn't make any progress
+                      f = null;
+                  }
                }
             } catch (Exception exp) {
-               exp.printStackTrace();
+               // exp.printStackTrace();
+               out.println("bad stack: " + exp);
                // continue, may be we can do a better job for other threads
             }
             if (concurrentLocks) {

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File PStack-808293.patch of Package java-9-openjdk (Revision d9880f85a7ab4e5a4abd325a8752a97c)

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