JDK14/Java14源码在线阅读

/*
 * Copyright (c) 2011, 2019, 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.PrintStream;
import java.util.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.opto.*;
import sun.jvm.hotspot.compiler.CompileTask;
import sun.jvm.hotspot.prims.JvmtiExport;
import sun.jvm.hotspot.types.*;
import sun.jvm.hotspot.utilities.GrowableArray;

public class ciEnv extends VMObject {
  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("ciEnv");
    dependenciesField = type.getAddressField("_dependencies");
    factoryField = type.getAddressField("_factory");
    compilerDataField = type.getAddressField("_compiler_data");
    taskField = type.getAddressField("_task");
  }

  private static AddressField dependenciesField;
  private static AddressField factoryField;
  private static AddressField compilerDataField;
  private static AddressField taskField;

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

  public Compile compilerData() {
    Address addr = compilerDataField.getValue(this.getAddress());
    if (addr == null) {
      return null;
    }
    return new Compile(addr);
  }

  public ciObjectFactory factory() {
    return new ciObjectFactory(factoryField.getValue(this.getAddress()));
  }

  public CompileTask task() {
    return new CompileTask(taskField.getValue(this.getAddress()));
  }

  public void dumpReplayData(PrintStream out) {
    out.println("JvmtiExport can_access_local_variables " +
                (JvmtiExport.canAccessLocalVariables() ? '1' : '0'));
    out.println("JvmtiExport can_hotswap_or_post_breakpoint " +
                (JvmtiExport.canHotswapOrPostBreakpoint() ? '1' : '0'));
    out.println("JvmtiExport can_post_on_exceptions " +
                (JvmtiExport.canPostOnExceptions() ? '1' : '0'));

    GrowableArray<ciMetadata> objects = factory().objects();
    out.println("# " + objects.length() + " ciObject found");
    for (int i = 0; i < objects.length(); i++) {
      ciMetadata o = objects.at(i);
      out.println("# ciMetadata" + i + " @ " + o);
      o.dumpReplayData(out);
    }

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