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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
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package sun.jvm.hotspot.runtime;

import java.io.*;
import java.util.*;
import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.utilities.*;

public abstract class JavaVFrame extends VFrame {
  
JVM state
/** JVM state */
public abstract Method getMethod(); public abstract int getBCI(); public abstract StackValueCollection getLocals(); public abstract StackValueCollection getExpressions(); public abstract List getMonitors(); // List<MonitorInfo>
Test operation
/** Test operation */
public boolean isJavaFrame() { return true; }
Package-internal constructor
/** Package-internal constructor */
JavaVFrame(Frame fr, RegisterMap regMap, JavaThread thread) { super(fr, regMap, thread); } /** Get monitor (if any) that this JavaVFrame is trying to enter */ // FIXME: not yet implemented // public Address getPendingMonitor(int frameCount); /** Printing used during stack dumps */ // FIXME: not yet implemented // void print_lock_info(int frame_count);
Printing operations
/** Printing operations */
// // FIXME: implement visitor pattern for traversing vframe contents? // public void print() { printOn(System.out); } public void printOn(PrintStream tty) { super.printOn(tty); tty.print("\t"); getMethod().printValueOn(tty); tty.println(); tty.println("\tbci:\t" + getBCI()); printStackValuesOn(tty, "locals", getLocals()); printStackValuesOn(tty, "expressions", getExpressions()); // List<MonitorInfo> // FIXME: not yet implemented // List list = getMonitors(); // if (list.isEmpty()) { // return; // } // for (int index = 0; index < list.size(); index++) { // MonitorInfo monitor = (MonitorInfo) list.get(index); // tty.print("\t obj\t"); // monitor.getOwner().printValueOn(tty); // tty.println(); // tty.print("\t "); // monitor.lock().printOn(tty); // tty.println(); // } } public void printActivation(int index) { printActivationOn(System.out, index); } public void printActivationOn(PrintStream tty, int index) { // frame number and method tty.print(index + " - "); printValueOn(tty); tty.println(); if (VM.getVM().wizardMode()) { printOn(tty); tty.println(); } }
Verification operations
/** Verification operations */
public void verify() { } public boolean equals(Object o) { if (o == null || !(o instanceof JavaVFrame)) { return false; } JavaVFrame other = (JavaVFrame) o; // Check static part if (!getMethod().equals(other.getMethod())) { return false; } if (getBCI() != other.getBCI()) { return false; } // dynamic part - we just compare the frame pointer if (! getFrame().equals(other.getFrame())) { return false; } return true; } public int hashCode() { return getMethod().hashCode() ^ getBCI() ^ getFrame().hashCode(); }
Structural compare
/** Structural compare */
public boolean structuralCompare(JavaVFrame other) { // Check static part if (!getMethod().equals(other.getMethod())) { return false; } if (getBCI() != other.getBCI()) { return false; } // Check locals StackValueCollection locs = getLocals(); StackValueCollection otherLocs = other.getLocals(); if (Assert.ASSERTS_ENABLED) { Assert.that(locs.size() == otherLocs.size(), "sanity check"); } for (int i = 0; i < locs.size(); i++) { // it might happen the compiler reports a conflict and // the interpreter reports a bogus int. if ( isCompiledFrame() && (locs.get(i)).getType() == BasicType.getTConflict()) continue; if (other.isCompiledFrame() && (otherLocs.get(i)).getType() == BasicType.getTConflict()) continue; if (!locs.get(i).equals(otherLocs.get(i))) { return false; } } // Check expressions StackValueCollection exprs = getExpressions(); StackValueCollection otherExprs = other.getExpressions(); if (Assert.ASSERTS_ENABLED) { Assert.that(exprs.size() == otherExprs.size(), "sanity check"); } for (int i = 0; i < exprs.size(); i++) { if (!exprs.get(i).equals(otherExprs.get(i))) { return false; } } return true; } //-------------------------------------------------------------------------------- // Internals only below this point // private void printStackValuesOn(PrintStream tty, String title, StackValueCollection values) { if (values.isEmpty()) { return; } tty.println("\t" + title + ":"); for (int index = 0; index < values.size(); index++) { tty.print("\t" + index + "\t"); values.get(index).printOn(tty); tty.println(); } } }