pcDesc.cpp revision 1879:f95d63e2154a 
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/debugInfoRec.hpp"
27#include "code/nmethod.hpp"
28#include "code/pcDesc.hpp"
29#include "code/scopeDesc.hpp"
30#include "memory/resourceArea.hpp"
31
32PcDesc::PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset) {
33  assert(sizeof(PcDescFlags) <= 4, "occupies more than a word");
34  _pc_offset           = pc_offset;
35  _scope_decode_offset = scope_decode_offset;
36  _obj_decode_offset   = obj_decode_offset;
37  _flags.word          = 0;
38}
39
40address PcDesc::real_pc(const nmethod* code) const {
41  return code->code_begin() + pc_offset();
42}
43
44void PcDesc::print(nmethod* code) {
45#ifndef PRODUCT
46  ResourceMark rm;
47  tty->print_cr("PcDesc(pc=0x%lx offset=%x):", real_pc(code), pc_offset());
48
49  if (scope_decode_offset() == DebugInformationRecorder::serialized_null) {
50    return;
51  }
52
53  for (ScopeDesc* sd = code->scope_desc_at(real_pc(code));
54       sd != NULL;
55       sd = sd->sender()) {
56    tty->print("  ");
57    sd->method()->print_short_name(tty);
58    tty->print("  @%d", sd->bci());
59    if (sd->should_reexecute())
60      tty->print("  reexecute=true");
61    tty->cr();
62  }
63#endif
64}
65
66bool PcDesc::verify(nmethod* code) {
67  //Unimplemented();
68  return true;
69}
70