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 
  32 PcDesc::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 
  40 address PcDesc::real_pc(const nmethod* code) const {
  41   return code->code_begin() + pc_offset();
  42 }
  43 
  44 void 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 
  66 bool PcDesc::verify(nmethod* code) {
  67   //Unimplemented();
  68   return true;
  69 }