hotspot/agent/src/share/classes/sun/jvm/hotspot/runtime/x86/X86RicochetFrame.java
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
Reviewed-by: kvn
/*
* Copyright (c) 2011, 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.runtime.x86;
import java.util.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.types.*;
public class X86RicochetFrame extends VMObject {
static {
VM.registerVMInitializedObserver(new Observer() {
public void update(Observable o, Object data) {
initialize(VM.getVM().getTypeDataBase());
}
});
}
private static void initialize(TypeDataBase db) {
Type type = db.lookupType("MethodHandles::RicochetFrame");
senderLinkField = type.getAddressField("_sender_link");
savedArgsBaseField = type.getAddressField("_saved_args_base");
exactSenderSPField = type.getAddressField("_exact_sender_sp");
senderPCField = type.getAddressField("_sender_pc");
}
private static AddressField senderLinkField;
private static AddressField savedArgsBaseField;
private static AddressField exactSenderSPField;
private static AddressField senderPCField;
static X86RicochetFrame fromFrame(X86Frame f) {
return new X86RicochetFrame(f.getFP().addOffsetTo(- senderLinkField.getOffset()));
}
private X86RicochetFrame(Address addr) {
super(addr);
}
public Address senderLink() {
return senderLinkField.getValue(addr);
}
public Address senderLinkAddress() {
return addr.addOffsetTo(senderLinkField.getOffset());
}
public Address savedArgsBase() {
return savedArgsBaseField.getValue(addr);
}
public Address extendedSenderSP() {
return savedArgsBase();
}
public Address exactSenderSP() {
return exactSenderSPField.getValue(addr);
}
public Address senderPC() {
return senderPCField.getValue(addr);
}
}