globals_x86.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 2000, 2009, 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 */
24
25// Sets the default values for platform dependent flags used by the runtime system.
26// (see globals.hpp)
27
28define_pd_global(bool, ConvertSleepToYield,      true);
29define_pd_global(bool, ShareVtableStubs,         true);
30define_pd_global(bool, CountInterpCalls,         true);
31define_pd_global(bool, NeedsDeoptSuspend,        false); // only register window machines need this
32
33define_pd_global(bool, ImplicitNullChecks,       true);  // Generate code for implicit null checks
34define_pd_global(bool, UncommonNullCast,         true);  // Uncommon-trap NULLs past to check cast
35
36// See 4827828 for this change. There is no globals_core_i486.hpp. I can't
37// assign a different value for C2 without touching a number of files. Use
38// #ifdef to minimize the change as it's late in Mantis. -- FIXME.
39// c1 doesn't have this problem because the fix to 4858033 assures us
40// the the vep is aligned at CodeEntryAlignment whereas c2 only aligns
41// the uep and the vep doesn't get real alignment but just slops on by
42// only assured that the entry instruction meets the 5 byte size requirement.
43#ifdef COMPILER2
44define_pd_global(intx, CodeEntryAlignment,       32);
45#else
46define_pd_global(intx, CodeEntryAlignment,       16);
47#endif // COMPILER2
48define_pd_global(intx, OptoLoopAlignment,        16);
49define_pd_global(intx, InlineFrequencyCount,     100);
50define_pd_global(intx, InlineSmallCode,          1000);
51
52define_pd_global(intx, StackYellowPages, 2);
53define_pd_global(intx, StackRedPages, 1);
54#ifdef AMD64
55// Very large C++ stack frames using solaris-amd64 optimized builds
56// due to lack of optimization caused by C++ compiler bugs
57define_pd_global(intx, StackShadowPages, SOLARIS_ONLY(20) NOT_SOLARIS(6) DEBUG_ONLY(+2));
58#else
59define_pd_global(intx, StackShadowPages, 3 DEBUG_ONLY(+1));
60#endif // AMD64
61
62define_pd_global(intx, PreInflateSpin,           10);
63
64define_pd_global(bool, RewriteBytecodes,     true);
65define_pd_global(bool, RewriteFrequentPairs, true);
66