1 /*
   2  * Copyright (c) 1997, 2010, 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 #include "precompiled.hpp"
  26 #include "code/debugInfo.hpp"
  27 #include "code/location.hpp"
  28 #include "runtime/handles.inline.hpp"
  29 
  30 void Location::print_on(outputStream* st) const {
  31   if(type() == invalid) {
  32     // product of Location::invalid_loc() or Location::Location().
  33     switch (where()) {
  34     case on_stack:     st->print("empty");    break;
  35     case in_register:  st->print("invalid");  break;
  36     }
  37     return;
  38   }
  39   switch (where()) {
  40   case on_stack:    st->print("stack[%d]", stack_offset());    break;
  41   case in_register: st->print("reg %s [%d]", reg()->name(), register_number()); break;
  42   default:          st->print("Wrong location where %d", where());
  43   }
  44   switch (type()) {
  45   case normal:                                 break;
  46   case oop:          st->print(",oop");        break;
  47   case narrowoop:    st->print(",narrowoop");  break;
  48   case int_in_long:  st->print(",int");        break;
  49   case lng:          st->print(",long");       break;
  50   case float_in_dbl: st->print(",float");      break;
  51   case dbl:          st->print(",double");     break;
  52   case addr:         st->print(",address");    break;
  53   default:           st->print("Wrong location type %d", type());
  54   }
  55 }
  56 
  57 
  58 Location::Location(DebugInfoReadStream* stream) {
  59   _value = (juint) stream->read_int();
  60 }
  61 
  62 
  63 void Location::write_on(DebugInfoWriteStream* stream) {
  64   stream->write_int(_value);
  65 }
  66 
  67 
  68 // Valid argument to Location::new_stk_loc()?
  69 bool Location::legal_offset_in_bytes(int offset_in_bytes) {
  70   if ((offset_in_bytes % BytesPerInt) != 0)  return false;
  71   return (juint)(offset_in_bytes / BytesPerInt) < (OFFSET_MASK >> OFFSET_SHIFT);
  72 }