001    /*
002     *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003     *
004     *  This file is licensed to You under the Eclipse Public License (EPL);
005     *  You may not use this file except in compliance with the License. You
006     *  may obtain a copy of the License at
007     *
008     *      http://www.opensource.org/licenses/eclipse-1.0.php
009     *
010     *  See the COPYRIGHT.txt file distributed with this work for information
011     *  regarding copyright ownership.
012     */
013    package org.jikesrvm.compilers.baseline;
014    
015    import org.jikesrvm.ArchitectureSpecific.BaselineConstants;
016    import org.jikesrvm.VM;
017    import org.vmmagic.pragma.Uninterruptible;
018    
019    /**
020     * Scratch space for JSR processing.  Used from ReferenceMaps
021     */
022    @Uninterruptible
023    final class JSRInfo implements BaselineConstants {
024    
025      int numberUnusualMaps;
026      UnusualMaps[] unusualMaps;
027      byte[] unusualReferenceMaps;
028      int freeMapSlot = 0;
029      /** Merged jsr ret and callers maps */
030      UnusualMaps extraUnusualMap = new UnusualMaps();
031      int tempIndex = 0;
032      int mergedReferenceMap = 0;       // result of jsrmerged maps - stored in referenceMaps
033      int mergedReturnAddressMap = 0;   // result of jsrmerged maps - stored return addresses
034    
035      JSRInfo(int initialMaps) {
036        unusualMaps = new UnusualMaps[initialMaps];
037      }
038    
039      /**
040       * show the basic information for each of the unusual maps this is for testing
041       * use
042       */
043      public void showUnusualMapInfo(int bytesPerMap) {
044        VM.sysWrite("-------------------------------------------------\n");
045        VM.sysWriteln("     numberUnusualMaps = ", numberUnusualMaps);
046    
047        for (int i = 0; i < numberUnusualMaps; i++) {
048          VM.sysWrite("-----------------\n");
049          VM.sysWrite("Unusual map #", i);
050          VM.sysWrite(":\n");
051          unusualMaps[i].showInfo();
052          VM.sysWrite("    -- reference Map:   ");
053          showAnUnusualMap(unusualMaps[i].getReferenceMapIndex(), bytesPerMap);
054          VM.sysWrite("\n");
055          VM.sysWrite("    -- non-reference Map:   ");
056          showAnUnusualMap(unusualMaps[i].getNonReferenceMapIndex(), bytesPerMap);
057          VM.sysWrite("\n");
058          VM.sysWrite("    -- returnAddress Map:   ");
059          showAnUnusualMap(unusualMaps[i].getReturnAddressMapIndex(), bytesPerMap);
060          VM.sysWrite("\n");
061        }
062        VM.sysWrite("------ extraUnusualMap:   ");
063        extraUnusualMap.showInfo();
064        showAnUnusualMap(extraUnusualMap.getReferenceMapIndex(), bytesPerMap);
065        showAnUnusualMap(extraUnusualMap.getNonReferenceMapIndex(), bytesPerMap);
066        showAnUnusualMap(extraUnusualMap.getReturnAddressMapIndex(), bytesPerMap);
067        VM.sysWrite("\n");
068      }
069    
070      /**
071       * show the basic information for a single unusualmap this is for testing use
072       */
073      public void showAnUnusualMap(int mapIndex, int bytesPerMap) {
074        VM.sysWrite("unusualMap with index = ", mapIndex);
075        VM.sysWrite("   Map bytes =  ");
076        for (int i = 0; i < bytesPerMap; i++) {
077          VM.sysWrite(unusualReferenceMaps[mapIndex + i]);
078          VM.sysWrite("   ");
079        }
080        VM.sysWrite("   ");
081      }
082    
083    }