jdk8-mips64-public/hotspot: src/cpu/sparc/vm/c2_globals

7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
Summary: A referent object that is only weakly reachable at the start of concurrent marking but is re-attached to the strongly reachable object graph during marking may not be marked as live. This can cause the reference object to be processed prematurely and leave dangling pointers to the referent object. Implement a read barrier for the java.lang.ref.Reference::referent field by intrinsifying the Reference.get() method, and intercepting accesses though JNI, reflection, and Unsafe, so that when a non-null referent object is read it is also logged in an SATB buffer.
Reviewed-by: kvn, iveresov, never, tonyp, dholmes

     1 /*

     2  * Copyright (c) 2000, 2010, 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

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    23  */

    25 #ifndef CPU_SPARC_VM_C2_GLOBALS_SPARC_HPP

    26 #define CPU_SPARC_VM_C2_GLOBALS_SPARC_HPP

    28 #include "utilities/globalDefinitions.hpp"

    29 #include "utilities/macros.hpp"

    31 // Sets the default values for platform dependent flags used by the server compiler.

    32 // (see c2_globals.hpp).  Alpha-sorted.

    34 define_pd_global(bool, BackgroundCompilation,        true);

    35 define_pd_global(bool, CICompileOSR,                 true);

    36 define_pd_global(bool, InlineIntrinsics,             false);

    37 define_pd_global(bool, PreferInterpreterNativeStubs, false);

    38 define_pd_global(bool, ProfileTraps,                 true);

    39 define_pd_global(bool, UseOnStackReplacement,        true);

    40 #ifdef CC_INTERP

    41 define_pd_global(bool, ProfileInterpreter,           false);

    42 #else

    43 define_pd_global(bool, ProfileInterpreter,           true);

    44 #endif // CC_INTERP

    45 define_pd_global(bool, TieredCompilation,            false);

    46 define_pd_global(intx, CompileThreshold,             10000);

    47 define_pd_global(intx, BackEdgeThreshold,            140000);

    49 define_pd_global(intx, OnStackReplacePercentage,     140);

    50 define_pd_global(intx, ConditionalMoveLimit,         4);

    51 define_pd_global(intx, FLOATPRESSURE,                52);  // C2 on V9 gets to use all the float/double registers

    52 define_pd_global(intx, FreqInlineSize,               175);

    53 define_pd_global(intx, INTPRESSURE,                  48);  // large register set

    54 define_pd_global(intx, InteriorEntryAlignment,       16);  // = CodeEntryAlignment

    55 define_pd_global(intx, NewSizeThreadIncrease, ScaleForWordSize(4*K));

    56 define_pd_global(intx, RegisterCostAreaRatio,        12000);

    57 define_pd_global(bool, UseTLAB,                      true);

    58 define_pd_global(bool, ResizeTLAB,                   true);

    59 define_pd_global(intx, LoopUnrollLimit,              60); // Design center runs on 1.3.1

    61 // Peephole and CISC spilling both break the graph, and so makes the

    62 // scheduler sick.

    63 define_pd_global(bool, OptoPeephole,                 false);

    64 define_pd_global(bool, UseCISCSpill,                 false);

    65 define_pd_global(bool, OptoBundling,                 false);

    66 define_pd_global(bool, OptoScheduling,               true);

    68 #ifdef _LP64

    69 // We need to make sure that all generated code is within

    70 // 2 gigs of the libjvm.so runtime routines so we can use

    71 // the faster "call" instruction rather than the expensive

    72 // sequence of instructions to load a 64 bit pointer.

    73 //

    74 // InitialCodeCacheSize derived from specjbb2000 run.

    75 define_pd_global(intx, InitialCodeCacheSize,         2048*K); // Integral multiple of CodeCacheExpansionSize

    76 define_pd_global(intx, ReservedCodeCacheSize,        48*M);

    77 define_pd_global(intx, CodeCacheExpansionSize,       64*K);

    79 // Ergonomics related flags

    80 define_pd_global(uint64_t,MaxRAM,                    128ULL*G);

    81 #else

    82 // InitialCodeCacheSize derived from specjbb2000 run.

    83 define_pd_global(intx, InitialCodeCacheSize,         1536*K); // Integral multiple of CodeCacheExpansionSize

    84 define_pd_global(intx, ReservedCodeCacheSize,        32*M);

    85 define_pd_global(intx, CodeCacheExpansionSize,       32*K);

    86 // Ergonomics related flags

    87 define_pd_global(uint64_t,MaxRAM,                    4ULL*G);

    88 #endif

    89 define_pd_global(uintx,CodeCacheMinBlockLength,      4);

    91 // Heap related flags

    92 define_pd_global(uintx,PermSize,    ScaleForWordSize(16*M));

    93 define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M));

    95 // Ergonomics related flags

    96 define_pd_global(bool, NeverActAsServerClassMachine, false);

    98 #endif // CPU_SPARC_VM_C2_GLOBALS_SPARC_HPP

src/cpu/sparc/vm/c2_globals_sparc.hpp@e1162778c1c8

src/cpu/sparc/vm/c2_globals_sparc.hpp

Mercurial > jdk8-mips64-public > hotspot / file revision

src/cpu/sparc/vm/c2_globals_sparc.hpp@e1162778c1c8

src/cpu/sparc/vm/c2_globals_sparc.hpp