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Java example source code file (ciMethodData.java)

This example Java source code file (ciMethodData.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

address, addressfield, bitdata, cintfield, counterdata, datalayout, internalerror, methoddata, multibranchdata, object, observer, profiledata, retdata, util, wrongtypeexception

The ciMethodData.java Java example source code

/*
 * 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.ci;

import java.io.*;
import java.util.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.types.*;

public class ciMethodData extends ciMetadata {
  static {
    VM.registerVMInitializedObserver(new Observer() {
        public void update(Observable o, Object data) {
          initialize(VM.getVM().getTypeDataBase());
        }
      });
  }

  private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
    Type type      = db.lookupType("ciMethodData");
    origField = type.getAddressField("_orig");
    currentMileageField = new CIntField(type.getCIntegerField("_current_mileage"), 0);
    argReturnedField = new CIntField(type.getCIntegerField("_arg_returned"), 0);
    argStackField = new CIntField(type.getCIntegerField("_arg_stack"), 0);
    argLocalField = new CIntField(type.getCIntegerField("_arg_local"), 0);
    eflagsField = new CIntField(type.getCIntegerField("_eflags"), 0);
    hintDiField = new CIntField(type.getCIntegerField("_hint_di"), 0);
    currentMileageField = new CIntField(type.getCIntegerField("_current_mileage"), 0);
    dataField = type.getAddressField("_data");
    extraDataSizeField = new CIntField(type.getCIntegerField("_extra_data_size"), 0);
    dataSizeField = new CIntField(type.getCIntegerField("_data_size"), 0);
    stateField = new CIntField(type.getCIntegerField("_state"), 0);
    sizeofMethodDataOopDesc = (int)db.lookupType("MethodData").getSize();;
  }

  private static AddressField origField;
  private static CIntField currentMileageField;
  private static CIntField argReturnedField;
  private static CIntField argStackField;
  private static CIntField argLocalField;
  private static CIntField eflagsField;
  private static CIntField hintDiField;
  private static AddressField dataField;
  private static CIntField extraDataSizeField;
  private static CIntField dataSizeField;
  private static CIntField stateField;
  private static int sizeofMethodDataOopDesc;

  public ciMethodData(Address addr) {
    super(addr);
  }

  private byte[] fetchDataAt(Address base, long size) {
    byte[] result = new byte[(int)size];
    for (int i = 0; i < size; i++) {
      result[i] = base.getJByteAt(i);
    }
    return result;
  }

  public byte[] orig() {
    // fetch the orig MethodData data between header and dataSize
    Address base = getAddress().addOffsetTo(origField.getOffset());
    byte[] result = new byte[MethodData.sizeofMethodDataOopDesc];
    for (int i = 0; i < MethodData.sizeofMethodDataOopDesc; i++) {
      result[i] = base.getJByteAt(i);
    }
    return result;
  }

  public  long[] data() {
    // Read the data as an array of intptr_t elements
    Address base = dataField.getValue(getAddress());
    int elements = dataSize() / MethodData.cellSize;
    long[] result = new long[elements];
    for (int i = 0; i < elements; i++) {
      Address value = base.getAddressAt(i * MethodData.cellSize);
      if (value != null) {
        result[i] = value.minus(null);
      }
    }
    return result;
  }

  int dataSize() {
    return (int)dataSizeField.getValue(getAddress());
  }

  int state() {
    return (int)stateField.getValue(getAddress());
  }

  int currentMileage() {
    return (int)currentMileageField.getValue(getAddress());
  }

  boolean outOfBounds(int dataIndex) {
    return dataIndex >= dataSize();
  }

  ProfileData dataAt(int dataIndex) {
    if (outOfBounds(dataIndex)) {
      return null;
    }
    DataLayout dataLayout = new DataLayout(dataField.getValue(getAddress()), dataIndex);

    switch (dataLayout.tag()) {
    case DataLayout.noTag:
    default:
      throw new InternalError();
    case DataLayout.bitDataTag:
      return new BitData(dataLayout);
    case DataLayout.counterDataTag:
      return new CounterData(dataLayout);
    case DataLayout.jumpDataTag:
      return new JumpData(dataLayout);
    case DataLayout.receiverTypeDataTag:
      return new ciReceiverTypeData(dataLayout);
    case DataLayout.virtualCallDataTag:
      return new ciVirtualCallData(dataLayout);
    case DataLayout.retDataTag:
      return new RetData(dataLayout);
    case DataLayout.branchDataTag:
      return new BranchData(dataLayout);
    case DataLayout.multiBranchDataTag:
      return new MultiBranchData(dataLayout);
    }
  }

  int dpToDi(int dp) {
    return dp;
  }

  int firstDi() { return 0; }
  ProfileData firstData() { return dataAt(firstDi()); }
  ProfileData nextData(ProfileData current) {
    int currentIndex = dpToDi(current.dp());
    int nextIndex = currentIndex + current.sizeInBytes();
    return dataAt(nextIndex);
  }
  boolean isValid(ProfileData current) { return current != null; }

  public void printDataOn(PrintStream st) {
    ProfileData data = firstData();
    for ( ; isValid(data); data = nextData(data)) {
      st.print(dpToDi(data.dp()));
      st.print(" ");
      // st->fillTo(6);
      data.printDataOn(st);
    }
  }

  public void dumpReplayData(PrintStream out) {
    MethodData mdo = (MethodData)getMetadata();
    Method method = mdo.getMethod();
    Klass holder = method.getMethodHolder();
    out.print("ciMethodData " +
              holder.getName().asString() + " " +
              OopUtilities.escapeString(method.getName().asString()) + " " +
              method.getSignature().asString() + " " +
              state() + " " + currentMileage());
    byte[] orig = orig();
    out.print(" orig " + orig.length);
    for (int i = 0; i < orig.length; i++) {
      out.print(" " + (orig[i] & 0xff));
    }

    long[] data = data();
    out.print(" data " +  data.length);
    for (int i = 0; i < data.length; i++) {
      out.print(" 0x" + Long.toHexString(data[i]));
    }
    int count = 0;
    for (int round = 0; round < 2; round++) {
      if (round == 1) out.print(" oops " + count);
      ProfileData pdata = firstData();
      for ( ; isValid(pdata); pdata = nextData(pdata)) {
        if (pdata instanceof ciReceiverTypeData) {
          ciReceiverTypeData vdata = (ciReceiverTypeData)pdata;
          for (int i = 0; i < vdata.rowLimit(); i++) {
            ciKlass k = vdata.receiverAt(i);
            if (k != null) {
              if (round == 0) count++;
              else out.print(" " + ((vdata.dp() + vdata.cellOffset(vdata.receiverCellIndex(i))) / MethodData.cellSize) + " " + k.name());
            }
          }
        } else if (pdata instanceof ciVirtualCallData) {
          ciVirtualCallData vdata = (ciVirtualCallData)pdata;
          for (int i = 0; i < vdata.rowLimit(); i++) {
            ciKlass k = vdata.receiverAt(i);
            if (k != null) {
              if (round == 0) count++;
              else out.print(" " + ((vdata.dp() + vdata.cellOffset(vdata.receiverCellIndex(i))) / MethodData.cellSize + " " + k.name()));
            }
          }
        }
      }
    }
    out.println();
  }
}

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