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/cardTableModRefBS.hpp"

    30 #include "gc/shared/collectedHeap.hpp"

    31 #include "memory/universe.hpp"

    32 #include "runtime/os.hpp"

    33 #include "utilities/debug.hpp"

    34 #ifdef COMPILER1

    35 #include "c1/c1_globals.hpp"

    36 #endif

    37 

    38 address symbolic_Relocation::symbolic_value(symbolic_Relocation::symbolic_reference t) {

    39   if (Universe::heap() == NULL) {

    40     // the symbolic values are not needed so early

    41     // (and most of them lead to errors if asked too early)

    42     return NULL;

    43   }

    44   switch(t) {

    45   case symbolic_Relocation::polling_page_reference: {

    46     return os::get_polling_page();

    47   }

    48   case symbolic_Relocation::eden_top_reference: {

    49     if (!Universe::heap()->supports_inline_contig_alloc()) {

    50       return NULL;

    51     }

    52     return (address)Universe::heap()->top_addr();

    53   }

    54   case symbolic_Relocation::heap_end_reference: {

    55     if (!Universe::heap()->supports_inline_contig_alloc()) {

    56       return NULL;

    57     }

    58     return (address)Universe::heap()->end_addr();

    59   }

    60   case symbolic_Relocation::card_table_reference: {

    61     BarrierSet* bs = Universe::heap()->barrier_set();

    62     CardTableModRefBS* ct = (CardTableModRefBS*)bs;

    63     return (address)ct->byte_map_base;

    64   }

    65   case symbolic_Relocation::mark_bits_reference: {

    66     return (address)Universe::verify_mark_bits();

    67   }

    68   case symbolic_Relocation::mark_mask_reference: {

    69     return (address)Universe::verify_mark_mask();

    70   }

    71   case symbolic_Relocation::oop_bits_reference: {

    72     return (address)Universe::verify_oop_bits();

    73   }

    74   case symbolic_Relocation::oop_mask_reference: {

    75     return (address)Universe::verify_oop_mask();

    76   }

    77   case symbolic_Relocation::debug_string_reference: {

    78     return (address)"<Lost debug string>";

    79   }

    80   default: {

    81     // missing declaration

    82     ShouldNotReachHere();

    83     return NULL;

    84   }

    85   }

    86 }