1 /*
   2  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 package sun.jvm.hotspot.debugger.linux.amd64;
  26 
  27 import sun.jvm.hotspot.debugger.*;
  28 import sun.jvm.hotspot.debugger.amd64.*;
  29 import sun.jvm.hotspot.debugger.linux.*;
  30 import sun.jvm.hotspot.debugger.cdbg.*;
  31 import sun.jvm.hotspot.debugger.cdbg.basic.*;
  32 
  33 final public class LinuxAMD64CFrame extends BasicCFrame {
  34    public LinuxAMD64CFrame(LinuxDebugger dbg, Address rbp, Address rip) {
























  35       super(dbg.getCDebugger());
  36       this.rbp = rbp;
  37       this.rip = rip;
  38       this.dbg = dbg;

  39    }
  40 
  41    // override base class impl to avoid ELF parsing
  42    public ClosestSymbol closestSymbolToPC() {
  43       // try native lookup in debugger.
  44       return dbg.lookup(dbg.getAddressValue(pc()));
  45    }
  46 
  47    public Address pc() {
  48       return rip;
  49    }
  50 
  51    public Address localVariableBase() {
  52       return rbp;
  53    }
  54 
  55    public CFrame sender(ThreadProxy thread) {
  56       AMD64ThreadContext context = (AMD64ThreadContext) thread.getContext();
  57       Address rsp = context.getRegisterAsAddress(AMD64ThreadContext.RSP);
  58 
  59       if ( (rbp == null) || rbp.lessThan(rsp) ) {

  60         return null;
  61       }

  62 
  63       // Check alignment of rbp
  64       if ( dbg.getAddressValue(rbp) % ADDRESS_SIZE != 0) {



















  65         return null;
  66       }









  67 
  68       Address nextRBP = rbp.getAddressAt( 0 * ADDRESS_SIZE);
  69       if (nextRBP == null || nextRBP.lessThanOrEqual(rbp)) {
  70         return null;
  71       }
  72       Address nextPC  = rbp.getAddressAt( 1 * ADDRESS_SIZE);




























  73       if (nextPC == null) {
  74         return null;
  75       }
  76       return new LinuxAMD64CFrame(dbg, nextRBP, nextPC);




  77    }
  78 
  79    // package/class internals only
  80    private static final int ADDRESS_SIZE = 8;
  81    private Address rip;
  82    private Address rbp;
  83    private LinuxDebugger dbg;

  84 }
--- EOF ---