Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/StackFrameStream.java @ 6972:bd7a7ce2e264
6830717: replay of compilations would help with debugging
Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method.
Reviewed-by: kvn, twisti, sspitsyn
Contributed-by: yumin.qi@oracle.com
| author | minqi |
|---|---|
| date | Mon, 12 Nov 2012 14:03:53 -0800 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.runtime; | |
| 26 | |
| 27 import sun.jvm.hotspot.utilities.*; | |
| 28 | |
| 29 /** <P> StackFrameStream iterates through the frames of a thread | |
| 30 starting from top most frame. It automatically takes care of | |
| 31 updating the location of all (callee-saved) registers. Notice: If | |
| 32 a thread is stopped at a safepoint, all registers are saved, not | |
| 33 only the callee-saved ones. </P> | |
| 34 | |
| 35 <P> Use: </P> | |
| 36 | |
| 37 <PRE> | |
| 38 for(StackFrameStream fst = new StackFrameStream(thread); !fst.isDone(); fst.next()) { | |
| 39 ... | |
| 40 } | |
| 41 </PRE> | |
| 42 */ | |
| 43 | |
| 44 public class StackFrameStream { | |
| 45 private Frame fr; | |
| 46 private RegisterMap regMap; | |
| 47 private boolean isDone; | |
| 48 | |
| 49 /** Equivalent to StackFrameStream(thread, true) */ | |
| 50 public StackFrameStream(JavaThread thread) { | |
| 51 this(thread, true); | |
| 52 } | |
| 53 | |
| 54 public StackFrameStream(JavaThread thread, boolean update) { | |
| 55 if (!VM.getVM().isDebugging()) { | |
| 56 if (Assert.ASSERTS_ENABLED) { | |
| 57 Assert.that(thread.hasLastJavaFrame(), "sanity check"); | |
| 58 } | |
| 59 fr = thread.getLastFrame(); | |
| 60 regMap = thread.newRegisterMap(update); | |
| 61 isDone = false; | |
| 62 } else { | |
| 63 // Special case code to find the topmost Java frame | |
| 64 // FIXME: should check to see whether we're at safepoint, and if | |
| 65 // so, skip the "current frame guess" call and unnecessary | |
| 66 // stackwalking work | |
| 67 fr = thread.getCurrentFrameGuess(); | |
| 68 regMap = thread.newRegisterMap(update); | |
| 69 while ((fr != null) && (!fr.isJavaFrame())) { | |
| 70 if (fr.isFirstFrame()) { | |
| 71 fr = null; | |
| 72 } else { | |
| 73 fr = fr.sender(regMap); | |
| 74 } | |
| 75 } | |
| 76 if (fr == null) { | |
| 77 isDone = true; | |
| 78 } | |
| 79 } | |
| 80 } | |
| 81 | |
| 82 /** Iteration */ | |
| 83 public boolean isDone() { | |
| 84 if (isDone) { | |
| 85 return true; | |
| 86 } else { | |
| 87 if (fr == null) { | |
| 88 isDone = true; | |
| 89 return true; | |
| 90 } | |
| 91 isDone = fr.isFirstFrame(); | |
| 92 return false; | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 public void next() { | |
| 97 if (!isDone) { | |
| 98 fr = fr.sender(regMap); | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 /** Query */ | |
| 103 public Frame getCurrent() { return fr; } | |
| 104 public RegisterMap getRegisterMap() { return regMap; } | |
| 105 } |