1 /*
   2  * Copyright (c) 2016, 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 package jdk.tools.jaotc;
  25 
  26 import java.util.List;
  27 
  28 import jdk.vm.ci.code.site.Mark;
  29 
  30 public final class CodeOffsets {
  31     private final int entry;
  32     private final int verifiedEntry;
  33     private final int exceptionHandler;
  34     private final int deoptHandler;
  35 
  36     private CodeOffsets(int entry, int verifiedEntry, int exceptionHandler, int deoptHandler) {
  37         this.entry = entry;
  38         this.verifiedEntry = verifiedEntry;
  39         this.exceptionHandler = exceptionHandler;
  40         this.deoptHandler = deoptHandler;
  41     }
  42 
  43     public static CodeOffsets buildFrom(List<Mark> marks) {
  44         int entry = 0;
  45         int verifiedEntry = 0;
  46         int exceptionHandler = -1;
  47         int deoptHandler = -1;
  48 
  49         for (Mark mark : marks) {
  50             if (mark.id instanceof Integer) {
  51                 MarkId markId = MarkId.getEnum((int) mark.id);
  52                 switch (markId) {
  53                     case UNVERIFIED_ENTRY:
  54                         entry = mark.pcOffset;
  55                         break;
  56                     case VERIFIED_ENTRY:
  57                         verifiedEntry = mark.pcOffset;
  58                         break;
  59                     case OSR_ENTRY:
  60                         // Unhandled
  61                         break;
  62                     case EXCEPTION_HANDLER_ENTRY:
  63                         exceptionHandler = mark.pcOffset;
  64                         break;
  65                     case DEOPT_HANDLER_ENTRY:
  66                         deoptHandler = mark.pcOffset;
  67                         break;
  68                     default:
  69                         break; // Ignore others
  70                 }
  71             }
  72         }
  73         return new CodeOffsets(entry, verifiedEntry, exceptionHandler, deoptHandler);
  74     }
  75 
  76     public int entry() {
  77         return entry;
  78     }
  79 
  80     public int verifiedEntry() {
  81         return verifiedEntry;
  82     }
  83 
  84     public int exceptionHandler() {
  85         return exceptionHandler;
  86     }
  87 
  88     public int deoptHandler() {
  89         return deoptHandler;
  90     }
  91 }