globals_x86.hpp revision 1879:f95d63e2154a 
1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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
34define_pd_global(bool, ConvertSleepToYield,      true);
35define_pd_global(bool, ShareVtableStubs,         true);
36define_pd_global(bool, CountInterpCalls,         true);
37define_pd_global(bool, NeedsDeoptSuspend,        false); // only register window machines need this
38
39define_pd_global(bool, ImplicitNullChecks,       true);  // Generate code for implicit null checks
40define_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
50define_pd_global(intx, CodeEntryAlignment,       32);
51#else
52define_pd_global(intx, CodeEntryAlignment,       16);
53#endif // COMPILER2
54define_pd_global(intx, OptoLoopAlignment,        16);
55define_pd_global(intx, InlineFrequencyCount,     100);
56define_pd_global(intx, InlineSmallCode,          1000);
57
58define_pd_global(intx, StackYellowPages, 2);
59define_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
63define_pd_global(intx, StackShadowPages, SOLARIS_ONLY(20) NOT_SOLARIS(6) DEBUG_ONLY(+2));
64#else
65define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1));
66#endif // AMD64
67
68define_pd_global(intx, PreInflateSpin,           10);
69
70define_pd_global(bool, RewriteBytecodes,     true);
71define_pd_global(bool, RewriteFrequentPairs, true);
72
73define_pd_global(bool, UseMembar,            false);
74
75#endif // CPU_X86_VM_GLOBALS_X86_HPP
76