1 /*

     2  * Copyright 2000-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    24 

    25 //

    26 // Sets the default values for platform dependent flags used by the runtime system.

    27 // (see globals.hpp)

    28 //

    29 

    30 define_pd_global(bool,  ConvertSleepToYield,      true);

    31 define_pd_global(bool,  ShareVtableStubs,         true);

    32 define_pd_global(bool,  CountInterpCalls,         true);

    33 

    34 define_pd_global(bool, ImplicitNullChecks,          true);  // Generate code for implicit null checks

    35 define_pd_global(bool, UncommonNullCast,            true);  // Uncommon-trap NULLs past to check cast

    36 

    37 // See 4827828 for this change. There is no globals_core_i486.hpp. I can't

    38 // assign a different value for C2 without touching a number of files. Use

    39 // #ifdef to minimize the change as it's late in Mantis. -- FIXME.

    40 // c1 doesn't have this problem because the fix to 4858033 assures us

    41 // the the vep is aligned at CodeEntryAlignment whereas c2 only aligns

    42 // the uep and the vep doesn't get real alignment but just slops on by

    43 // only assured that the entry instruction meets the 5 byte size requirement.

    44 #ifdef COMPILER2

    45 define_pd_global(intx,  CodeEntryAlignment,       32);

    46 #else

    47 define_pd_global(intx,  CodeEntryAlignment,       16);

    48 #endif // COMPILER2

    49 

    50 define_pd_global(bool, NeedsDeoptSuspend,           false); // only register window machines need this

    51 

    52 define_pd_global(uintx, TLABSize,                 0);

    53 #ifdef AMD64

    54 define_pd_global(uintx, NewSize, ScaleForWordSize(2048 * K));

    55 // Very large C++ stack frames using solaris-amd64 optimized builds

    56 // due to lack of optimization caused by C++ compiler bugs

    57 define_pd_global(intx, StackShadowPages, SOLARIS_ONLY(20) NOT_SOLARIS(6) DEBUG_ONLY(+2));

    58 #else

    59 define_pd_global(uintx, NewSize,                  1024 * K);

    60 define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1));

    61 #endif // AMD64

    62 define_pd_global(intx,  InlineFrequencyCount,     100);

    63 define_pd_global(intx,  PreInflateSpin,           10);

    64 

    65 define_pd_global(intx, StackYellowPages, 2);

    66 define_pd_global(intx, StackRedPages, 1);

    67 

    68 define_pd_global(bool, RewriteBytecodes,     true);

    69 define_pd_global(bool, RewriteFrequentPairs, true);