src/hotspot/share/code/relocInfo_ext.cpp

/*
 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#include "precompiled.hpp"
#include "code/codeCache.hpp"
#include "code/relocInfo.hpp"
#include "code/relocInfo_ext.hpp"
#include "gc/shared/cardTable.hpp"
#include "gc/shared/cardTableBarrierSet.hpp"
#include "gc/shared/collectedHeap.hpp"
#include "memory/universe.hpp"
#include "runtime/os.hpp"
#include "utilities/debug.hpp"
#ifdef COMPILER1
#include "c1/c1_globals.hpp"
#endif

address symbolic_Relocation::symbolic_value(symbolic_Relocation::symbolic_reference t) {
  if (Universe::heap() == NULL) {
    // the symbolic values are not needed so early
    // (and most of them lead to errors if asked too early)
    return NULL;
  }
  switch(t) {
  case symbolic_Relocation::polling_page_reference: {
    return os::get_polling_page();
  }
  case symbolic_Relocation::eden_top_reference: {
    if (!Universe::heap()->supports_inline_contig_alloc()) {
      return NULL;
    }
    return (address)Universe::heap()->top_addr();
  }
  case symbolic_Relocation::heap_end_reference: {
    if (!Universe::heap()->supports_inline_contig_alloc()) {
      return NULL;
    }
    return (address)Universe::heap()->end_addr();
  }
  case symbolic_Relocation::card_table_reference: {
    BarrierSet* bs = BarrierSet::barrier_set();
    CardTableBarrierSet* ctbs = barrier_set_cast<CardTableBarrierSet>(bs);
    CardTable* ct = ctbs->card_table();
    return (address)ct->byte_map_base();
  }
  case symbolic_Relocation::mark_bits_reference: {
    return (address)Universe::verify_mark_bits();
  }
  case symbolic_Relocation::mark_mask_reference: {
    return (address)Universe::verify_mark_mask();
  }
  case symbolic_Relocation::oop_bits_reference: {
    return (address)Universe::verify_oop_bits();
  }
  case symbolic_Relocation::oop_mask_reference: {
    return (address)Universe::verify_oop_mask();
  }
  case symbolic_Relocation::debug_string_reference: {
    return (address)"<Lost debug string>";
  }
  default: {
    // missing declaration
    ShouldNotReachHere();
    return NULL;
  }
  }
}