1 /*
   2  * Copyright (c) 2016, 2017, 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 
  26 package jdk.tools.jaotc;
  27 
  28 import jdk.tools.jaotc.binformat.BinaryContainer;
  29 import jdk.tools.jaotc.binformat.Relocation;
  30 import jdk.tools.jaotc.binformat.Relocation.RelocType;
  31 import jdk.tools.jaotc.binformat.Symbol;
  32 
  33 import jdk.vm.ci.code.site.Mark;
  34 
  35 final class MarkProcessor {
  36 
  37     private final BinaryContainer binaryContainer;
  38 
  39     MarkProcessor(DataBuilder dataBuilder) {
  40         binaryContainer = dataBuilder.getBinaryContainer();
  41     }
  42 
  43     /**
  44      * Parse a {@link Mark} generated by the compiler and create all needed binary section
  45      * constructs.
  46      *
  47      * @param methodInfo compiled method info
  48      * @param mark mark being processed
  49      */
  50     @SuppressWarnings("fallthrough")
  51     void process(CompiledMethodInfo methodInfo, Mark mark) {
  52         MarkId markId = MarkId.getEnum((int) mark.id);
  53         switch (markId) {
  54             case EXCEPTION_HANDLER_ENTRY:
  55             case DEOPT_HANDLER_ENTRY:
  56                 break;
  57             case POLL_FAR:
  58             case POLL_RETURN_FAR:
  59                 if (binaryContainer.getThreadLocalHandshakes()) {
  60                     // skip relocation
  61                     break;
  62                 }
  63                 // fallthrough
  64             case CARD_TABLE_ADDRESS:
  65             case HEAP_TOP_ADDRESS:
  66             case HEAP_END_ADDRESS:
  67             case NARROW_KLASS_BASE_ADDRESS:
  68             case NARROW_OOP_BASE_ADDRESS:
  69             case CRC_TABLE_ADDRESS:
  70             case LOG_OF_HEAP_REGION_GRAIN_BYTES:
  71             case INLINE_CONTIGUOUS_ALLOCATION_SUPPORTED:
  72                 String vmSymbolName;
  73                 switch (markId) {
  74                     case POLL_FAR:
  75                     case POLL_RETURN_FAR:
  76                         vmSymbolName = BinaryContainer.getPollingPageSymbolName();
  77                         break;
  78                     case CARD_TABLE_ADDRESS:
  79                         vmSymbolName = BinaryContainer.getCardTableAddressSymbolName();
  80                         break;
  81                     case HEAP_TOP_ADDRESS:
  82                         vmSymbolName = BinaryContainer.getHeapTopAddressSymbolName();
  83                         break;
  84                     case HEAP_END_ADDRESS:
  85                         vmSymbolName = BinaryContainer.getHeapEndAddressSymbolName();
  86                         break;
  87                     case NARROW_KLASS_BASE_ADDRESS:
  88                         vmSymbolName = BinaryContainer.getNarrowKlassBaseAddressSymbolName();
  89                         break;
  90                     case NARROW_OOP_BASE_ADDRESS:
  91                         vmSymbolName = BinaryContainer.getNarrowOopBaseAddressSymbolName();
  92                         break;
  93                     case CRC_TABLE_ADDRESS:
  94                         vmSymbolName = BinaryContainer.getCrcTableAddressSymbolName();
  95                         break;
  96                     case LOG_OF_HEAP_REGION_GRAIN_BYTES:
  97                         vmSymbolName = BinaryContainer.getLogOfHeapRegionGrainBytesSymbolName();
  98                         break;
  99                     case INLINE_CONTIGUOUS_ALLOCATION_SUPPORTED:
 100                         vmSymbolName = BinaryContainer.getInlineContiguousAllocationSupportedSymbolName();
 101                         break;
 102                     default:
 103                         throw new InternalError("Unhandled mark: " + mark);
 104                 }
 105                 String s = "got." + vmSymbolName;
 106                 Symbol gotSymbol = binaryContainer.getGotSymbol(s);
 107                 assert gotSymbol != null : " Processing Mark: Encountered undefined got symbol for  " + mark;
 108                 final int textBaseOffset = methodInfo.getTextSectionOffset();
 109                 final int textOffset = textBaseOffset + mark.pcOffset;
 110                 Relocation reloc = new Relocation(textOffset, RelocType.EXTERNAL_PLT_TO_GOT, 8, binaryContainer.getCodeContainer(), gotSymbol);
 111                 binaryContainer.addRelocation(reloc);
 112                 break;
 113             case VERIFIED_ENTRY:
 114             case UNVERIFIED_ENTRY:
 115             case OSR_ENTRY:
 116             case INVOKEINTERFACE:
 117             case INVOKEVIRTUAL:
 118             case INVOKESTATIC:
 119             case INVOKESPECIAL:
 120             case INLINE_INVOKE:
 121             case POLL_NEAR:
 122             case POLL_RETURN_NEAR:
 123                 // Nothing to do.
 124                 break;
 125             default:
 126                 throw new InternalError("Unexpected mark found: " + mark);
 127         }
 128     }
 129 }