1 /*
   2  * Copyright (c) 1997, 2019, 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   _pc_offset           = pc_offset;
  34   _scope_decode_offset = scope_decode_offset;
  35   _obj_decode_offset   = obj_decode_offset;
  36   _flags               = 0;
  37 }
  38 
  39 address PcDesc::real_pc(const CompiledMethod* code) const {
  40   return code->code_begin() + pc_offset();
  41 }
  42 
  43 void PcDesc::print_on(outputStream* st, CompiledMethod* code) {
  44 #ifndef PRODUCT
  45   ResourceMark rm;
  46   st->print("PcDesc(pc=" PTR_FORMAT " offset=%x bits=%x):", p2i(real_pc(code)), pc_offset(), _flags);
  47 
  48   if (scope_decode_offset() == DebugInformationRecorder::serialized_null) {
  49     st->cr();
  50     return;
  51   }
  52 
  53   int tab = 8;
  54   int pos = st->position() + 2; // current column plus two spaces
  55   pos = ((pos+tab-1)/tab)*tab;
  56 
  57   for (ScopeDesc* sd = code->scope_desc_at(real_pc(code));
  58        sd != NULL;
  59        sd = sd->sender()) {
  60     sd->print_on(st);
  61   }
  62 #endif
  63 }
  64 
  65 bool PcDesc::verify(CompiledMethod* code) {
  66   //Unimplemented();
  67   return true;
  68 }