location.cpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 1997, 2008, 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 "incls/_precompiled.incl"
26#include "incls/_location.cpp.incl"
27
28void Location::print_on(outputStream* st) const {
29  if(type() == invalid) {
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 narrowoop:    st->print(",narrowoop");  break;
46  case int_in_long:  st->print(",int");        break;
47  case lng:          st->print(",long");       break;
48  case float_in_dbl: st->print(",float");      break;
49  case dbl:          st->print(",double");     break;
50  case addr:         st->print(",address");    break;
51  default:           st->print("Wrong location type %d", type());
52  }
53}
54
55
56Location::Location(DebugInfoReadStream* stream) {
57  _value = (juint) stream->read_int();
58}
59
60
61void Location::write_on(DebugInfoWriteStream* stream) {
62  stream->write_int(_value);
63}
64
65
66// Valid argument to Location::new_stk_loc()?
67bool Location::legal_offset_in_bytes(int offset_in_bytes) {
68  if ((offset_in_bytes % BytesPerInt) != 0)  return false;
69  return (juint)(offset_in_bytes / BytesPerInt) < (OFFSET_MASK >> OFFSET_SHIFT);
70}
71