author | coleenp |
Sun, 13 Apr 2008 17:43:42 -0400 | |
changeset 360 | 21d113ecbf6a |
parent 1 | 489c9b5090e2 |
child 670 | ddf3e9583f2f |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright 2004-2005 Sun Microsystems, Inc. All Rights Reserved. |
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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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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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* |
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*/ |
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package sun.jvm.hotspot.utilities; |
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import java.io.*; |
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import sun.jvm.hotspot.debugger.*; |
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import sun.jvm.hotspot.memory.*; |
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import sun.jvm.hotspot.oops.*; |
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import sun.jvm.hotspot.runtime.*; |
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/** |
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* This is abstract base class for heap graph writers. This class does |
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* not assume any file format for the heap graph. It hides heap |
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* iteration, object (fields) iteration mechanism from derived |
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* classes. This class does not even accept OutputStream etc. so that |
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* derived class can construct specific writer/filter from input |
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* stream. |
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*/ |
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public abstract class AbstractHeapGraphWriter implements HeapGraphWriter { |
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// the function iterates heap and calls Oop type specific writers |
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protected void write() throws IOException { |
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SymbolTable symTbl = VM.getVM().getSymbolTable(); |
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javaLangClass = symTbl.probe("java/lang/Class"); |
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javaLangString = symTbl.probe("java/lang/String"); |
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javaLangThread = symTbl.probe("java/lang/Thread"); |
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ObjectHeap heap = VM.getVM().getObjectHeap(); |
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try { |
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heap.iterate(new DefaultHeapVisitor() { |
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public void prologue(long usedSize) { |
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try { |
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writeHeapHeader(); |
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} catch (IOException exp) { |
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throw new RuntimeException(exp); |
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} |
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} |
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public boolean doObj(Oop oop) { |
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try { |
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if (oop instanceof TypeArray) { |
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writePrimitiveArray((TypeArray)oop); |
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} else if (oop instanceof ObjArray) { |
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Klass klass = oop.getKlass(); |
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ObjArrayKlass oak = (ObjArrayKlass) klass; |
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Klass bottomType = oak.getBottomKlass(); |
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if (bottomType instanceof InstanceKlass || |
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bottomType instanceof TypeArrayKlass) { |
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writeObjectArray((ObjArray)oop); |
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} else { |
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writeInternalObject(oop); |
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} |
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} else if (oop instanceof Instance) { |
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Instance instance = (Instance) oop; |
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Klass klass = instance.getKlass(); |
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Symbol name = klass.getName(); |
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if (name.equals(javaLangString)) { |
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writeString(instance); |
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} else if (name.equals(javaLangClass)) { |
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writeClass(instance); |
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} else if (name.equals(javaLangThread)) { |
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writeThread(instance); |
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} else { |
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klass = klass.getSuper(); |
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while (klass != null) { |
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name = klass.getName(); |
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if (name.equals(javaLangThread)) { |
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writeThread(instance); |
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return false; |
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} |
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klass = klass.getSuper(); |
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} |
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writeInstance(instance); |
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} |
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} else { |
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// not-a-Java-visible oop |
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writeInternalObject(oop); |
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} |
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} catch (IOException exp) { |
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throw new RuntimeException(exp); |
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} |
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return false; |
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} |
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public void epilogue() { |
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try { |
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writeHeapFooter(); |
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} catch (IOException exp) { |
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throw new RuntimeException(exp); |
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} |
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} |
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}); |
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// write JavaThreads |
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writeJavaThreads(); |
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// write JNI global handles |
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writeGlobalJNIHandles(); |
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} catch (RuntimeException re) { |
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handleRuntimeException(re); |
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} |
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} |
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protected void writeJavaThreads() throws IOException { |
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Threads threads = VM.getVM().getThreads(); |
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JavaThread jt = threads.first(); |
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int index = 1; |
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while (jt != null) { |
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if (jt.getThreadObj() != null) { |
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// Note that the thread serial number range is 1-to-N |
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writeJavaThread(jt, index); |
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index++; |
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} |
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jt = jt.next(); |
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} |
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} |
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protected void writeJavaThread(JavaThread jt, int index) |
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throws IOException { |
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} |
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protected void writeGlobalJNIHandles() throws IOException { |
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JNIHandles handles = VM.getVM().getJNIHandles(); |
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JNIHandleBlock blk = handles.globalHandles(); |
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if (blk != null) { |
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try { |
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blk.oopsDo(new AddressVisitor() { |
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public void visitAddress(Address handleAddr) { |
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try { |
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if (handleAddr != null) { |
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writeGlobalJNIHandle(handleAddr); |
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} |
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} catch (IOException exp) { |
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throw new RuntimeException(exp); |
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} |
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} |
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360
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
|
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public void visitCompOopAddress(Address handleAddr) { |
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
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throw new RuntimeException("Should not reach here. JNIHandles are not compressed"); |
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
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} |
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}); |
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} catch (RuntimeException re) { |
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handleRuntimeException(re); |
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} |
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} |
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} |
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protected void writeGlobalJNIHandle(Address handleAddr) throws IOException { |
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} |
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protected void writeHeapHeader() throws IOException { |
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} |
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// write non-Java-visible (hotspot internal) object |
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protected void writeInternalObject(Oop oop) throws IOException { |
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} |
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// write Java primitive array |
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protected void writePrimitiveArray(TypeArray array) throws IOException { |
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writeObject(array); |
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} |
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// write Java object array |
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protected void writeObjectArray(ObjArray array) throws IOException { |
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writeObject(array); |
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} |
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protected void writeInstance(Instance instance) throws IOException { |
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writeObject(instance); |
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} |
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protected void writeString(Instance instance) throws IOException { |
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writeInstance(instance); |
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} |
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protected void writeClass(Instance instance) throws IOException { |
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writeInstance(instance); |
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} |
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protected void writeThread(Instance instance) throws IOException { |
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writeInstance(instance); |
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} |
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protected void writeObject(Oop oop) throws IOException { |
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writeObjectHeader(oop); |
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writeObjectFields(oop); |
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writeObjectFooter(oop); |
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} |
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protected void writeObjectHeader(Oop oop) throws IOException { |
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} |
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// write instance fields of given object |
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protected void writeObjectFields(final Oop oop) throws IOException { |
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try { |
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oop.iterate(new DefaultOopVisitor() { |
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public void doOop(OopField field, boolean isVMField) { |
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try { |
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Oop ref = field.getValue(oop); |
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if (ref instanceof TypeArray || |
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ref instanceof ObjArray || |
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ref instanceof Instance) { |
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writeReferenceField(oop, field); |
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} else { |
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writeInternalReferenceField(oop, field); |
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} |
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} catch (IOException exp) { |
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throw new RuntimeException(exp); |
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} |
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} |
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public void doByte(ByteField field, boolean isVMField) { |
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try { |
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writeByteField(oop, field); |
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} catch (IOException exp) { |
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throw new RuntimeException(exp); |
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} |
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} |
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public void doChar(CharField field, boolean isVMField) { |
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try { |
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writeCharField(oop, field); |
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} catch (IOException exp) { |
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throw new RuntimeException(exp); |
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} |
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} |
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public void doBoolean(BooleanField field, boolean vField) { |
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try { |
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writeBooleanField(oop, field); |
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} catch (IOException exp) { |
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throw new RuntimeException(exp); |
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} |
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} |
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public void doShort(ShortField field, boolean isVMField) { |
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try { |
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writeShortField(oop, field); |
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} catch (IOException exp) { |
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throw new RuntimeException(exp); |
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} |
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} |
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public void doInt(IntField field, boolean isVMField) { |
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try { |
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writeIntField(oop, field); |
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} catch (IOException exp) { |
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throw new RuntimeException(exp); |
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} |
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} |
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public void doLong(LongField field, boolean isVMField) { |
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try { |
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writeLongField(oop, field); |
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} catch (IOException exp) { |
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throw new RuntimeException(exp); |
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} |
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} |
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public void doFloat(FloatField field, boolean isVMField) { |
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try { |
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writeFloatField(oop, field); |
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} catch (IOException exp) { |
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throw new RuntimeException(exp); |
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} |
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} |
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public void doDouble(DoubleField field, boolean vField) { |
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try { |
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writeDoubleField(oop, field); |
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} catch (IOException exp) { |
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throw new RuntimeException(exp); |
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} |
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} |
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}, false); |
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} catch (RuntimeException re) { |
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handleRuntimeException(re); |
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} |
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} |
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// object field writers |
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protected void writeInternalReferenceField(Oop oop, OopField field) |
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throws IOException { |
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} |
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protected void writeReferenceField(Oop oop, OopField field) |
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throws IOException { |
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} |
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protected void writeByteField(Oop oop, ByteField field) |
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throws IOException { |
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} |
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protected void writeCharField(Oop oop, CharField field) |
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throws IOException { |
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} |
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protected void writeBooleanField(Oop oop, BooleanField field) |
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throws IOException { |
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} |
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protected void writeShortField(Oop oop, ShortField field) |
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throws IOException { |
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} |
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protected void writeIntField(Oop oop, IntField field) |
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throws IOException { |
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} |
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protected void writeLongField(Oop oop, LongField field) |
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throws IOException { |
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} |
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protected void writeFloatField(Oop oop, FloatField field) |
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throws IOException { |
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} |
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protected void writeDoubleField(Oop oop, DoubleField field) |
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throws IOException { |
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} |
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protected void writeObjectFooter(Oop oop) throws IOException { |
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} |
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protected void writeHeapFooter() throws IOException { |
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} |
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// HeapVisitor, OopVisitor methods can't throw any non-runtime |
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// exception. But, derived class write methods (which are called |
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// from visitor callbacks) may throw IOException. Hence, we throw |
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// RuntimeException with origianal IOException as cause from the |
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// visitor methods. This method gets back the original IOException |
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// (if any) and re-throws the same. |
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protected void handleRuntimeException(RuntimeException re) |
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throws IOException { |
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Throwable cause = re.getCause(); |
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if (cause != null && cause instanceof IOException) { |
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throw (IOException) cause; |
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} else { |
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// some other RuntimeException, just re-throw |
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throw re; |
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} |
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} |
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// whether a given oop is Java visible or hotspot internal? |
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protected boolean isJavaVisible(Oop oop) { |
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if (oop instanceof Instance || oop instanceof TypeArray) { |
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return true; |
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} else if (oop instanceof ObjArray) { |
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ObjArrayKlass oak = (ObjArrayKlass) oop.getKlass(); |
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Klass bottomKlass = oak.getBottomKlass(); |
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return bottomKlass instanceof InstanceKlass || |
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bottomKlass instanceof TypeArrayKlass; |
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} else { |
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return false; |
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} |
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} |
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protected Symbol javaLangClass; |
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protected Symbol javaLangString; |
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protected Symbol javaLangThread; |
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} |