java-9-openjdk/PStack-808293.patch

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2017-08-15 17:40:47 +00:00
--- jdk9/hotspot/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/tools/PStack.java 2012-04-06 02:26:33.322164601 +0200
+++ jdk9/hotspot/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/tools/PStack.java 2012-04-06 02:26:57.958514071 +0200
@@ -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
@@ -84,7 +85,8 @@
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) {