1 /*
   2  * Copyright (c) 2015, 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/codeCache.hpp"
  27 #include "code/relocInfo.hpp"
  28 #include "code/relocInfo_ext.hpp"
  29 #include "gc/shared/cardTable.hpp"
  30 #include "gc/shared/cardTableModRefBS.hpp"
  31 #include "gc/shared/collectedHeap.hpp"
  32 #include "memory/universe.hpp"
  33 #include "runtime/os.hpp"
  34 #include "utilities/debug.hpp"
  35 #ifdef COMPILER1
  36 #include "c1/c1_globals.hpp"
  37 #endif
  38 
  39 address symbolic_Relocation::symbolic_value(symbolic_Relocation::symbolic_reference t) {
  40   if (Universe::heap() == NULL) {
  41     // the symbolic values are not needed so early
  42     // (and most of them lead to errors if asked too early)
  43     return NULL;
  44   }
  45   switch(t) {
  46   case symbolic_Relocation::polling_page_reference: {
  47     return os::get_polling_page();
  48   }
  49   case symbolic_Relocation::eden_top_reference: {
  50     if (!Universe::heap()->supports_inline_contig_alloc()) {
  51       return NULL;
  52     }
  53     return (address)Universe::heap()->top_addr();
  54   }
  55   case symbolic_Relocation::heap_end_reference: {
  56     if (!Universe::heap()->supports_inline_contig_alloc()) {
  57       return NULL;
  58     }
  59     return (address)Universe::heap()->end_addr();
  60   }
  61   case symbolic_Relocation::card_table_reference: {
  62     BarrierSet* bs = Universe::heap()->barrier_set();
  63     CardTableModRefBS* ct = (CardTableModRefBS*)bs;
  64     return (address)ct->card_table()->byte_map_base();
  65   }
  66   case symbolic_Relocation::mark_bits_reference: {
  67     return (address)Universe::verify_mark_bits();
  68   }
  69   case symbolic_Relocation::mark_mask_reference: {
  70     return (address)Universe::verify_mark_mask();
  71   }
  72   case symbolic_Relocation::oop_bits_reference: {
  73     return (address)Universe::verify_oop_bits();
  74   }
  75   case symbolic_Relocation::oop_mask_reference: {
  76     return (address)Universe::verify_oop_mask();
  77   }
  78   case symbolic_Relocation::debug_string_reference: {
  79     return (address)"<Lost debug string>";
  80   }
  81   default: {
  82     // missing declaration
  83     ShouldNotReachHere();
  84     return NULL;
  85   }
  86   }
  87 }