1 /*
   2  * Copyright (c) 2000, 2019, 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
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  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,  ShareVtableStubs,     true);
  36 
  37 define_pd_global(bool,  ImplicitNullChecks,   true);
  38 define_pd_global(bool,  TrapBasedNullChecks,  false);
  39 define_pd_global(bool,  UncommonNullCast,     true);
  40 
  41 define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment.
  42 define_pd_global(intx,  CodeEntryAlignment,   32);
  43 define_pd_global(intx,  OptoLoopAlignment,    16);
  44 define_pd_global(intx,  InlineFrequencyCount, 100);
  45 define_pd_global(intx,  InlineSmallCode,      1000);
  46 
  47 // not used, but must satisfy following constraints:
  48 // 1.) <VALUE> must be in the allowed range for intx *and*
  49 // 2.) <VALUE> % BytesPerLong == 0 so as to not
  50 //     violate the constraint verifier on JVM start-up.
  51 define_pd_global(intx,  InitArrayShortSize,   0);
  52 
  53 #define DEFAULT_STACK_YELLOW_PAGES (2)
  54 #define DEFAULT_STACK_RED_PAGES (1)
  55 #define DEFAULT_STACK_SHADOW_PAGES (5 LP64_ONLY(+1) DEBUG_ONLY(+3))
  56 #define DEFAULT_STACK_RESERVED_PAGES (0)
  57 
  58 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
  59 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
  60 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
  61 #define MIN_STACK_RESERVED_PAGES (0)
  62 
  63 define_pd_global(intx,  StackYellowPages,     DEFAULT_STACK_YELLOW_PAGES);
  64 define_pd_global(intx,  StackRedPages,        DEFAULT_STACK_RED_PAGES);
  65 define_pd_global(intx,  StackShadowPages,     DEFAULT_STACK_SHADOW_PAGES);
  66 define_pd_global(intx,  StackReservedPages,   DEFAULT_STACK_RESERVED_PAGES);
  67 
  68 define_pd_global(bool,  RewriteBytecodes,     true);
  69 define_pd_global(bool,  RewriteFrequentPairs, true);
  70 
  71 // GC Ergo Flags
  72 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M);  // default max size of CMS young gen, per GC worker thread
  73 
  74 define_pd_global(uintx, TypeProfileLevel, 0);
  75 
  76 define_pd_global(bool, PreserveFramePointer, false);
  77 
  78 define_pd_global(bool, ValueTypePassFieldsAsArgs, false);
  79 define_pd_global(bool, ValueTypeReturnedAsFields, false);
  80 
  81 // No performance work done here yet.
  82 define_pd_global(bool, CompactStrings, false);
  83 
  84 define_pd_global(bool, ThreadLocalHandshakes, false);
  85 
  86 #define ARCH_FLAGS(develop, \
  87                    product, \
  88                    diagnostic, \
  89                    experimental, \
  90                    notproduct, \
  91                    range, \
  92                    constraint, \
  93                    writeable)  \
  94                                                                             \
  95   product(bool, UseFastEmptyMethods, true,                                  \
  96           "Use fast method entry code for empty methods")                   \
  97                                                                             \
  98   product(bool, UseFastAccessorMethods, true,                               \
  99           "Use fast method entry code for accessor methods")                \
 100                                                                             \
 101 
 102 #endif // CPU_ZERO_GLOBALS_ZERO_HPP