Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/memory/Universe.java @ 271:818a18cd69a8
6730514: assertion failure in mangling code when expanding by 0 bytes
Summary: An expansion by 0 bytes was not anticipated when the assertion was composed.
Reviewed-by: jjh, jcoomes, apetrusenko
author | jmasa |
---|---|
date | Wed, 30 Jul 2008 11:54:00 -0700 |
parents | d1605aabd0a1 |
children | 660978a2a31a |
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/* * Copyright 2000-2008 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ package sun.jvm.hotspot.memory; import java.io.*; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.gc_interface.*; import sun.jvm.hotspot.gc_implementation.parallelScavenge.*; import sun.jvm.hotspot.oops.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.runtime.*; public class Universe { private static AddressField collectedHeapField; private static VirtualConstructor heapConstructor; private static sun.jvm.hotspot.types.OopField mainThreadGroupField; private static sun.jvm.hotspot.types.OopField systemThreadGroupField; // single dimensional primitive array klasses private static sun.jvm.hotspot.types.OopField boolArrayKlassObjField; private static sun.jvm.hotspot.types.OopField byteArrayKlassObjField; private static sun.jvm.hotspot.types.OopField charArrayKlassObjField; private static sun.jvm.hotspot.types.OopField intArrayKlassObjField; private static sun.jvm.hotspot.types.OopField shortArrayKlassObjField; private static sun.jvm.hotspot.types.OopField longArrayKlassObjField; private static sun.jvm.hotspot.types.OopField singleArrayKlassObjField; private static sun.jvm.hotspot.types.OopField doubleArrayKlassObjField; // system obj array klass object private static sun.jvm.hotspot.types.OopField systemObjArrayKlassObjField; private static AddressField heapBaseField; static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } private static synchronized void initialize(TypeDataBase db) { Type type = db.lookupType("Universe"); collectedHeapField = type.getAddressField("_collectedHeap"); heapConstructor = new VirtualConstructor(db); heapConstructor.addMapping("GenCollectedHeap", GenCollectedHeap.class); heapConstructor.addMapping("ParallelScavengeHeap", ParallelScavengeHeap.class); mainThreadGroupField = type.getOopField("_main_thread_group"); systemThreadGroupField = type.getOopField("_system_thread_group"); boolArrayKlassObjField = type.getOopField("_boolArrayKlassObj"); byteArrayKlassObjField = type.getOopField("_byteArrayKlassObj"); charArrayKlassObjField = type.getOopField("_charArrayKlassObj"); intArrayKlassObjField = type.getOopField("_intArrayKlassObj"); shortArrayKlassObjField = type.getOopField("_shortArrayKlassObj"); longArrayKlassObjField = type.getOopField("_longArrayKlassObj"); singleArrayKlassObjField = type.getOopField("_singleArrayKlassObj"); doubleArrayKlassObjField = type.getOopField("_doubleArrayKlassObj"); systemObjArrayKlassObjField = type.getOopField("_systemObjArrayKlassObj"); heapBaseField = type.getAddressField("_heap_base"); } public Universe() { } public CollectedHeap heap() { try { return (CollectedHeap) heapConstructor.instantiateWrapperFor(collectedHeapField.getValue()); } catch (WrongTypeException e) { return new CollectedHeap(collectedHeapField.getValue()); } } public static long getHeapBase() { if (heapBaseField.getValue() == null) { return 0; } else { return heapBaseField.getValue().minus(null); } } /** Returns "TRUE" iff "p" points into the allocated area of the heap. */ public boolean isIn(Address p) { return heap().isIn(p); } /** Returns "TRUE" iff "p" points into the reserved area of the heap. */ public boolean isInReserved(Address p) { return heap().isInReserved(p); } private Oop newOop(OopHandle handle) { return VM.getVM().getObjectHeap().newOop(handle); } public Oop mainThreadGroup() { return newOop(mainThreadGroupField.getValue()); } public Oop systemThreadGroup() { return newOop(systemThreadGroupField.getValue()); } public Oop systemObjArrayKlassObj() { return newOop(systemObjArrayKlassObjField.getValue()); } // iterate through the single dimensional primitive array klasses // refer to basic_type_classes_do(void f(klassOop)) in universe.cpp public void basicTypeClassesDo(SystemDictionary.ClassVisitor visitor) { visitor.visit((Klass)newOop(boolArrayKlassObjField.getValue())); visitor.visit((Klass)newOop(byteArrayKlassObjField.getValue())); visitor.visit((Klass)newOop(charArrayKlassObjField.getValue())); visitor.visit((Klass)newOop(intArrayKlassObjField.getValue())); visitor.visit((Klass)newOop(shortArrayKlassObjField.getValue())); visitor.visit((Klass)newOop(longArrayKlassObjField.getValue())); visitor.visit((Klass)newOop(singleArrayKlassObjField.getValue())); visitor.visit((Klass)newOop(doubleArrayKlassObjField.getValue())); } public void print() { printOn(System.out); } public void printOn(PrintStream tty) { heap().printOn(tty); } // Check whether an element of a typeArrayOop with the given type must be // aligned 0 mod 8. The typeArrayOop itself must be aligned at least this // strongly. public static boolean elementTypeShouldBeAligned(BasicType type) { return type == BasicType.T_DOUBLE || type == BasicType.T_LONG; } // Check whether an object field (static/non-static) of the given type must be // aligned 0 mod 8. public static boolean fieldTypeShouldBeAligned(BasicType type) { return type == BasicType.T_DOUBLE || type == BasicType.T_LONG; } }