1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   6  * under the terms of the GNU General Public License version 2 only, as
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  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).
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  24 
  25 #ifndef CPU_X86_VM_GLOBALS_X86_HPP
  26 #define CPU_X86_VM_GLOBALS_X86_HPP
  27 
  28 #include "utilities/globalDefinitions.hpp"
  29 #include "utilities/macros.hpp"
  30 
  31 // Sets the default values for platform dependent flags used by the runtime system.
  32 // (see globals.hpp)
  33 
  34 define_pd_global(bool, ConvertSleepToYield,      true);
  35 define_pd_global(bool, ShareVtableStubs,         true);
  36 define_pd_global(bool, CountInterpCalls,         true);
  37 define_pd_global(bool, NeedsDeoptSuspend,        false); // only register window machines need this
  38 
  39 define_pd_global(bool, ImplicitNullChecks,       true);  // Generate code for implicit null checks
  40 define_pd_global(bool, UncommonNullCast,         true);  // Uncommon-trap NULLs past to check cast
  41 
  42 // See 4827828 for this change. There is no globals_core_i486.hpp. I can't
  43 // assign a different value for C2 without touching a number of files. Use
  44 // #ifdef to minimize the change as it's late in Mantis. -- FIXME.
  45 // c1 doesn't have this problem because the fix to 4858033 assures us
  46 // the the vep is aligned at CodeEntryAlignment whereas c2 only aligns
  47 // the uep and the vep doesn't get real alignment but just slops on by
  48 // only assured that the entry instruction meets the 5 byte size requirement.
  49 #ifdef COMPILER2
  50 define_pd_global(intx, CodeEntryAlignment,       32);
  51 #else
  52 define_pd_global(intx, CodeEntryAlignment,       16);
  53 #endif // COMPILER2
  54 define_pd_global(intx, OptoLoopAlignment,        16);
  55 define_pd_global(intx, InlineFrequencyCount,     100);
  56 define_pd_global(intx, InlineSmallCode,          1000);
  57 
  58 define_pd_global(intx, StackYellowPages, 2);
  59 define_pd_global(intx, StackRedPages, 1);
  60 #ifdef AMD64
  61 // Very large C++ stack frames using solaris-amd64 optimized builds
  62 // due to lack of optimization caused by C++ compiler bugs
  63 define_pd_global(intx, StackShadowPages, SOLARIS_ONLY(20) NOT_SOLARIS(6) DEBUG_ONLY(+2));
  64 #else
  65 define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+5));
  66 #endif // AMD64
  67 
  68 define_pd_global(intx, PreInflateSpin,           10);
  69 
  70 define_pd_global(bool, RewriteBytecodes,     true);
  71 define_pd_global(bool, RewriteFrequentPairs, true);
  72 
  73 #ifdef _ALLBSD_SOURCE
  74 define_pd_global(bool, UseMembar,            true);
  75 #else
  76 define_pd_global(bool, UseMembar,            false);
  77 #endif
  78 
  79 // GC Ergo Flags
  80 define_pd_global(intx, CMSYoungGenPerWorker, 64*M);  // default max size of CMS young gen, per GC worker thread
  81 #endif // CPU_X86_VM_GLOBALS_X86_HPP