1 /*
   2  * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2020, NTT DATA.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 package sun.jvm.hotspot.debugger.linux.amd64;
  27 
  28 import java.lang.ref.Cleaner;
  29 import sun.jvm.hotspot.debugger.Address;
  30 import sun.jvm.hotspot.debugger.DebuggerException;
  31 
  32 public class DwarfParser {
  33   private final long p_dwarf_context; // native dwarf context handle
  34 
  35   private static native void init0();
  36   private static native long createDwarfContext(long lib);
  37   private static native void destroyDwarfContext(long context);
  38   private native boolean isIn0(long pc);
  39 
  40   static {
  41     init0();
  42   }
  43 
  44   public DwarfParser(Address lib) {
  45     p_dwarf_context = createDwarfContext(lib.asLongValue());
  46 
  47     if (p_dwarf_context == 0L) {
  48       throw new DebuggerException("Could not create DWARF context");
  49     }
  50 
  51     Cleaner.create()
  52            .register(this, () -> DwarfParser.destroyDwarfContext(p_dwarf_context));
  53   }
  54 
  55   public boolean isIn(Address pc) {
  56     return isIn0(pc.asLongValue());
  57   }
  58 
  59   private native void processDwarf0(long pc);
  60 
  61   public void processDwarf(Address pc) {
  62     processDwarf0(pc.asLongValue());
  63   }
  64 
  65   public native int getCFARegister();
  66   public native int getCFAOffset();
  67   public native int getReturnAddressOffsetFromCFA();
  68   public native int getBasePointerOffsetFromCFA();
  69   public native boolean isBPOffsetAvailable();
  70 }