Mercurial > hg > graal-jvmci-8
view agent/src/share/classes/sun/jvm/hotspot/oops/ReceiverTypeData.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 | da91efe96a93 |
children |
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/* * Copyright (c) 2011, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ package sun.jvm.hotspot.oops; import java.io.*; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.utilities.*; // ReceiverTypeData // // A ReceiverTypeData is used to access profiling information about a // dynamic type check. It consists of a counter which counts the total times // that the check is reached, and a series of (Klass, count) pairs // which are used to store a type profile for the receiver of the check. public class ReceiverTypeData extends CounterData { static final int receiver0Offset = counterCellCount; static final int count0Offset = receiver0Offset + 1; static final int receiverTypeRowCellCount = (count0Offset + 1) - receiver0Offset; public ReceiverTypeData(DataLayout layout) { super(layout); //assert(layout.tag() == DataLayout.receiverTypeDataTag || // layout.tag() == DataLayout.virtualCallDataTag, "wrong type"); } boolean isReceivertypedata() { return true; } static int staticCellCount() { return counterCellCount + MethodData.TypeProfileWidth * receiverTypeRowCellCount; } public int cellCount() { return staticCellCount(); } // Direct accessors public static int rowLimit() { return MethodData.TypeProfileWidth; } public static int receiverCellIndex(int row) { return receiver0Offset + row * receiverTypeRowCellCount; } public static int receiverCountCellIndex(int row) { return count0Offset + row * receiverTypeRowCellCount; } // Get the receiver at row. The 'unchecked' version is needed by parallel old // gc; it does not assert the receiver is a klass. During compaction of the // perm gen, the klass may already have moved, so the isKlass() predicate // would fail. The 'normal' version should be used whenever possible. Klass receiverUnchecked(int row) { //assert(row < rowLimit(), "oob"); Address recv = addressAt(receiverCellIndex(row)); return (Klass)Metadata.instantiateWrapperFor(recv); } public Klass receiver(int row) { Klass recv = receiverUnchecked(row); //assert(recv == NULL || ((oop)recv).isKlass(), "wrong type"); return recv; } public int receiverCount(int row) { //assert(row < rowLimit(), "oob"); return uintAt(receiverCountCellIndex(row)); } // Code generation support static int receiverOffset(int row) { return cellOffset(receiverCellIndex(row)); } static int receiverCountOffset(int row) { return cellOffset(receiverCountCellIndex(row)); } static int receiverTypeDataSize() { return cellOffset(staticCellCount()); } void printReceiverDataOn(PrintStream st) { int row; int entries = 0; for (row = 0; row < rowLimit(); row++) { if (receiver(row) != null) entries++; } st.println("count(" + count() + ") entries(" + entries + ")"); for (row = 0; row < rowLimit(); row++) { if (receiver(row) != null) { tab(st); receiver(row).printValueOn(st); st.println("(" + receiverCount(row) + ")"); } } } public void printDataOn(PrintStream st) { printShared(st, "ReceiverTypeData"); printReceiverDataOn(st); } }