1 /*
 2  * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
 3  * Copyright 2007, 2008, 2009, 2010, 2011 Red Hat, Inc.
 4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 5  *
 6  * This code is free software; you can redistribute it and/or modify it
 7  * under the terms of the GNU General Public License version 2 only, as
 8  * published by the Free Software Foundation.
 9  *
10  * This code is distributed in the hope that it will be useful, but WITHOUT
11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13  * version 2 for more details (a copy is included in the LICENSE file that
14  * accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License version
17  * 2 along with this work; if not, write to the Free Software Foundation,
18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19  *
20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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25 
26 #ifndef CPU_ZERO_GLOBALS_ZERO_HPP
27 #define CPU_ZERO_GLOBALS_ZERO_HPP
28 
29 #include "utilities/globalDefinitions.hpp"
30 #include "utilities/macros.hpp"
31 
32 // Set the default values for platform dependent flags used by the
33 // runtime system.  See globals.hpp for details of what they do.
34 
35 define_pd_global(bool,  ImplicitNullChecks,   true);
36 define_pd_global(bool,  TrapBasedNullChecks,  false);
37 define_pd_global(bool,  UncommonNullCast,     true);
38 
39 define_pd_global(uintx, CodeCacheSegmentSize, 64 COMPILER1_AND_COMPILER2_PRESENT(+64)); // Tiered compilation has large code-entry alignment.
40 define_pd_global(intx,  CodeEntryAlignment,   32);
41 define_pd_global(intx,  OptoLoopAlignment,    16);
42 define_pd_global(intx,  InlineSmallCode,      1000);
43 
44 // not used, but must satisfy following constraints:
45 // 1.) <VALUE> must be in the allowed range for intx *and*
46 // 2.) <VALUE> % BytesPerLong == 0 so as to not
47 //     violate the constraint verifier on JVM start-up.
48 define_pd_global(intx,  InitArrayShortSize,   0);
49 
50 #define DEFAULT_STACK_YELLOW_PAGES (2)
51 #define DEFAULT_STACK_RED_PAGES (1)
52 #define DEFAULT_STACK_SHADOW_PAGES (5 LP64_ONLY(+1) DEBUG_ONLY(+3))
53 #define DEFAULT_STACK_RESERVED_PAGES (0)
54 
55 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
56 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
57 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
58 #define MIN_STACK_RESERVED_PAGES (0)
59 
60 define_pd_global(intx,  StackYellowPages,     DEFAULT_STACK_YELLOW_PAGES);
61 define_pd_global(intx,  StackRedPages,        DEFAULT_STACK_RED_PAGES);
62 define_pd_global(intx,  StackShadowPages,     DEFAULT_STACK_SHADOW_PAGES);
63 define_pd_global(intx,  StackReservedPages,   DEFAULT_STACK_RESERVED_PAGES);
64 
65 define_pd_global(bool,  RewriteBytecodes,     true);
66 define_pd_global(bool,  RewriteFrequentPairs, true);
67 
68 define_pd_global(uintx, TypeProfileLevel, 0);
69 
70 define_pd_global(bool, PreserveFramePointer, false);
71 
72 define_pd_global(bool, InlineTypePassFieldsAsArgs, false);
73 define_pd_global(bool, InlineTypeReturnedAsFields, false);
74 
75 // No performance work done here yet.
76 define_pd_global(bool, CompactStrings, false);
77 
78 #define ARCH_FLAGS(develop,                                                 \
79                    product,                                                 \
80                    notproduct,                                              \
81                    range,                                                   \
82                    constraint)                                              \
83                                                                             \
84   product(bool, UseFastEmptyMethods, true,                                  \
85           "Use fast method entry code for empty methods")                   \
86                                                                             \
87   product(bool, UseFastAccessorMethods, true,                               \
88           "Use fast method entry code for accessor methods")
89 
90 // end of ARCH_FLAGS
91 
92 #endif // CPU_ZERO_GLOBALS_ZERO_HPP