Blame SOURCES/PStack-808293.patch
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--- openjdk/hotspot/agent/src/share/classes/sun/jvm/hotspot/tools/PStack.java 2012-04-06 02:26:33.322164601 +0200
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+++ openjdk/hotspot/agent/src/share/classes/sun/jvm/hotspot/tools/PStack.java 2012-04-06 02:26:57.958514071 +0200
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@@ -1,5 +1,6 @@
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/*
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* Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
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+ * Copyright (c) 2012, Red Hat Inc.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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@@ -84,7 +85,8 @@
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out.print("----------------- ");
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out.print(th);
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out.println(" -----------------");
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- while (f != null) {
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+ int maxStack = 256;
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+ while (f != null && maxStack-- > 0) {
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ClosestSymbol sym = f.closestSymbolToPC();
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Address pc = f.pc();
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out.print(pc + "\t");
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@@ -158,10 +160,19 @@
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printUnknown(out);
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}
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}
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+ Address oldPC = f.pc();
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+ Address oldFP = f.localVariableBase();
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f = f.sender(th);
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+ if (f != null
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+ && oldPC.equals(f.pc())
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+ && oldFP.equals(f.localVariableBase())) {
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+ // We didn't make any progress
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+ f = null;
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+ }
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}
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} catch (Exception exp) {
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- exp.printStackTrace();
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+ // exp.printStackTrace();
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+ out.println("bad stack: " + exp);
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// continue, may be we can do a better job for other threads
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}
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if (isJava && concurrentLocks) {
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