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25 
26 #ifndef CPU_ZERO_VM_GLOBALS_ZERO_HPP
27 #define CPU_ZERO_VM_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 define_pd_global(bool,  NeedsDeoptSuspend,    false);
37 
38 define_pd_global(bool,  ImplicitNullChecks,   true);
39 define_pd_global(bool,  TrapBasedNullChecks,  false);
40 define_pd_global(bool,  UncommonNullCast,     true);
41 
42 define_pd_global(uintx, CodeCacheSegmentSize, 64 TIERED_ONLY(+64)); // Tiered compilation has large code-entry alignment.
43 define_pd_global(intx,  CodeEntryAlignment,   32);
44 define_pd_global(intx,  OptoLoopAlignment,    16);
45 define_pd_global(intx,  InlineFrequencyCount, 100);
46 define_pd_global(intx,  InlineSmallCode,      1000);
47 
48 // not used, but must satisfy following constraints:
49 // 1.) <VALUE> must be in the allowed range for intx *and*
50 // 2.) <VALUE> % BytesPerLong == 0 so as to not
51 //     violate the constraint verifier on JVM start-up.
52 define_pd_global(intx,  InitArrayShortSize,   0);
53 
54 #define DEFAULT_STACK_YELLOW_PAGES (2)
55 #define DEFAULT_STACK_RED_PAGES (1)
56 #define DEFAULT_STACK_SHADOW_PAGES (5 LP64_ONLY(+1) DEBUG_ONLY(+3))
57 #define DEFAULT_STACK_RESERVED_PAGES (0)
58 
59 #define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
60 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
61 #define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
62 #define MIN_STACK_RESERVED_PAGES (0)
63 
64 define_pd_global(intx,  StackYellowPages,     DEFAULT_STACK_YELLOW_PAGES);
65 define_pd_global(intx,  StackRedPages,        DEFAULT_STACK_RED_PAGES);
66 define_pd_global(intx,  StackShadowPages,     DEFAULT_STACK_SHADOW_PAGES);
67 define_pd_global(intx,  StackReservedPages,   DEFAULT_STACK_RESERVED_PAGES);
68 
69 define_pd_global(bool,  RewriteBytecodes,     true);
70 define_pd_global(bool,  RewriteFrequentPairs, true);
71 
72 // GC Ergo Flags
73 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M);  // default max size of CMS young gen, per GC worker thread
74 
75 define_pd_global(uintx, TypeProfileLevel, 0);
76 
77 define_pd_global(bool, PreserveFramePointer, false);
78 
79 // No performance work done here yet.
80 define_pd_global(bool, CompactStrings, false);
81 
82 define_pd_global(bool, ThreadLocalHandshakes, false);
83 
84 #define ARCH_FLAGS(develop, \
85                    product, \
86                    diagnostic, \
87                    experimental, \
88                    notproduct, \
89                    range, \
90                    constraint, \
91                    writeable)  \
92                                                                             \
93   product(bool, UseFastEmptyMethods, true,                                  \
94           "Use fast method entry code for empty methods")                   \
95                                                                             \
96   product(bool, UseFastAccessorMethods, true,                               \
97           "Use fast method entry code for accessor methods")                \
98                                                                             \
99 
100 #endif // CPU_ZERO_VM_GLOBALS_ZERO_HPP
101