1 /*
   2  * Copyright 1997-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  *
  23  */
  24 
  25 #include "incls/_precompiled.incl"
  26 #include "incls/_location.cpp.incl"
  27 
  28 void Location::print_on(outputStream* st) const {
  29   if(type() == invalid && !legal_offset_in_bytes(offset() * BytesPerInt)) {
  30     // product of Location::invalid_loc() or Location::Location().
  31     switch (where()) {
  32     case on_stack:     st->print("empty");    break;
  33     case in_register:  st->print("invalid");  break;
  34     }
  35     return;
  36   }
  37   switch (where()) {
  38   case on_stack:    st->print("stack[%d]", stack_offset());    break;
  39   case in_register: st->print("reg %s [%d]", reg()->name(), register_number()); break;
  40   default:          st->print("Wrong location where %d", where());
  41   }
  42   switch (type()) {
  43   case normal:                                 break;
  44   case oop:          st->print(",oop");        break;
  45   case int_in_long:  st->print(",int");        break;
  46   case lng:          st->print(",long");       break;
  47   case float_in_dbl: st->print(",float");      break;
  48   case dbl:          st->print(",double");     break;
  49   case addr:         st->print(",address");    break;
  50   default:           st->print("Wrong location type %d", type());
  51   }
  52 }
  53 
  54 
  55 Location::Location(DebugInfoReadStream* stream) {
  56   _value = (uint16_t) stream->read_int();
  57 }
  58 
  59 
  60 void Location::write_on(DebugInfoWriteStream* stream) {
  61   stream->write_int(_value & 0x0000FFFF);
  62 }
  63 
  64 
  65 // Valid argument to Location::new_stk_loc()?
  66 bool Location::legal_offset_in_bytes(int offset_in_bytes) {
  67   if ((offset_in_bytes % BytesPerInt) != 0)  return false;
  68   return (offset_in_bytes / BytesPerInt) < (OFFSET_MASK >> OFFSET_SHIFT);
  69 }