Mercurial > hg > graal-compiler
annotate src/share/vm/oops/constMethodKlass.hpp @ 1711:a6bff45449bc
6973570: OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Summary: volatile store to static variable removed in favour of a volatile store to stack to avoid excessive cache coherency traffic; verified that the volatile store is not elided by any of our current compilers.
Reviewed-by: dholmes, dice, jcoomes, kvn
author | ysr |
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date | Tue, 10 Aug 2010 14:53:35 -0700 |
parents | c18cbe5936b8 |
children | 126ea7725993 |
rev | line source |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 // A constMethodKlass is the klass of a constMethodOop | |
26 | |
27 class constMethodKlass : public Klass { | |
28 friend class VMStructs; | |
29 private: | |
30 juint _alloc_size; // allocation profiling support | |
31 public: | |
32 // Testing | |
33 bool oop_is_constMethod() const { return true; } | |
34 virtual bool oop_is_parsable(oop obj) const; | |
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35 virtual bool oop_is_conc_safe(oop obj) const; |
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36 |
0 | 37 |
38 // Allocation | |
39 DEFINE_ALLOCATE_PERMANENT(constMethodKlass); | |
40 constMethodOop allocate(int byte_code_size, int compressed_line_number_size, | |
41 int localvariable_table_length, | |
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42 int checked_exceptions_length, |
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43 bool is_conc_safe, |
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44 TRAPS); |
0 | 45 static klassOop create_klass(TRAPS); |
46 | |
47 // Sizing | |
48 int oop_size(oop obj) const; | |
49 int klass_oop_size() const { return object_size(); } | |
50 | |
51 // Casting from klassOop | |
52 static constMethodKlass* cast(klassOop k) { | |
53 assert(k->klass_part()->oop_is_constMethod(), "cast to constMethodKlass"); | |
54 return (constMethodKlass*) k->klass_part(); | |
55 } | |
56 | |
57 // Sizing | |
58 static int header_size() { | |
59 return oopDesc::header_size() + sizeof(constMethodKlass)/HeapWordSize; | |
60 } | |
61 int object_size() const { | |
62 return align_object_size(header_size()); | |
63 } | |
64 | |
65 // Garbage collection | |
66 void oop_follow_contents(oop obj); | |
67 int oop_adjust_pointers(oop obj); | |
68 | |
69 // Parallel Scavenge and Parallel Old | |
70 PARALLEL_GC_DECLS | |
71 | |
72 // Allocation profiling support | |
73 juint alloc_size() const { return _alloc_size; } | |
74 void set_alloc_size(juint n) { _alloc_size = n; } | |
75 | |
76 // Iterators | |
77 int oop_oop_iterate(oop obj, OopClosure* blk); | |
78 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr); | |
79 | |
80 public: | |
81 // Printing | |
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82 void oop_print_value_on(oop obj, outputStream* st); |
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83 #ifndef PRODUCT |
0 | 84 void oop_print_on (oop obj, outputStream* st); |
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85 #endif //PRODUCT |
0 | 86 |
87 // Verify operations | |
88 const char* internal_name() const; | |
89 void oop_verify_on(oop obj, outputStream* st); | |
90 bool oop_partially_loaded(oop obj) const; | |
91 void oop_set_partially_loaded(oop obj); | |
92 }; |