Mercurial > hg > truffle

comparison src/share/vm/memory/universe.hpp @ 12056:740e263c80c6

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
8003424: Enable Class Data Sharing for CompressedOops 8016729: ObjectAlignmentInBytes=16 now forces the use of heap based compressed oops 8005933: The -Xshare:auto option is ignored for -server Summary: Move klass metaspace above the heap and support CDS with compressed klass ptrs. Reviewed-by: coleenp, kvn, mgerdin, tschatzl, stefank
author hseigel
date Thu, 15 Aug 2013 20:04:10 -0400
parents 85147f28faba
children 4c84d351cca9
comparison
equal deleted inserted replaced
12055:d96f52012aaa 12056:740e263c80c6
73 f->do_ptr((void**)&_klass); 73 f->do_ptr((void**)&_klass);
74 } 74 }
75 }; 75 };
76 76
77 77
78 // For UseCompressedOops and UseCompressedKlassPointers. 78 // For UseCompressedOops.
79 struct NarrowPtrStruct { 79 struct NarrowPtrStruct {
80 // Base address for oop/klass-within-java-object materialization. 80 // Base address for oop-within-java-object materialization.
81 // NULL if using wide oops/klasses or zero based narrow oops/klasses. 81 // NULL if using wide oops or zero based narrow oops.
82 address _base; 82 address _base;
83 // Number of shift bits for encoding/decoding narrow ptrs. 83 // Number of shift bits for encoding/decoding narrow ptrs.
84 // 0 if using wide ptrs or zero based unscaled narrow ptrs, 84 // 0 if using wide ptrs or zero based unscaled narrow ptrs,
85 // LogMinObjAlignmentInBytes/LogKlassAlignmentInBytes otherwise. 85 // LogMinObjAlignmentInBytes/LogKlassAlignmentInBytes otherwise.
86 int _shift; 86 int _shift;
104 friend class ClassLoader; 104 friend class ClassLoader;
105 friend class Arguments; 105 friend class Arguments;
106 friend class SystemDictionary; 106 friend class SystemDictionary;
107 friend class VMStructs; 107 friend class VMStructs;
108 friend class VM_PopulateDumpSharedSpace; 108 friend class VM_PopulateDumpSharedSpace;
109 friend class Metaspace;
109 110
110 friend jint universe_init(); 111 friend jint universe_init();
111 friend void universe2_init(); 112 friend void universe2_init();
112 friend bool universe_post_init(); 113 friend bool universe_post_init();
113 114
182 static struct NarrowPtrStruct _narrow_oop; 183 static struct NarrowPtrStruct _narrow_oop;
183 // For UseCompressedKlassPointers. 184 // For UseCompressedKlassPointers.
184 static struct NarrowPtrStruct _narrow_klass; 185 static struct NarrowPtrStruct _narrow_klass;
185 static address _narrow_ptrs_base; 186 static address _narrow_ptrs_base;
186 187
187 // Aligned size of the metaspace.
188 static size_t _class_metaspace_size;
189
190 // array of dummy objects used with +FullGCAlot 188 // array of dummy objects used with +FullGCAlot
191 debug_only(static objArrayOop _fullgc_alot_dummy_array;) 189 debug_only(static objArrayOop _fullgc_alot_dummy_array;)
192 // index of next entry to clear 190 // index of next entry to clear
193 debug_only(static int _fullgc_alot_dummy_next;) 191 debug_only(static int _fullgc_alot_dummy_next;)
194 192
235 _narrow_klass._base = base; 233 _narrow_klass._base = base;
236 } 234 }
237 static void set_narrow_oop_use_implicit_null_checks(bool use) { 235 static void set_narrow_oop_use_implicit_null_checks(bool use) {
238 assert(UseCompressedOops, "no compressed ptrs?"); 236 assert(UseCompressedOops, "no compressed ptrs?");
239 _narrow_oop._use_implicit_null_checks = use; 237 _narrow_oop._use_implicit_null_checks = use;
240 }
241 static bool reserve_metaspace_helper(bool with_base = false);
242 static ReservedHeapSpace reserve_heap_metaspace(size_t heap_size, size_t alignment, bool& contiguous);
243
244 static size_t class_metaspace_size() {
245 return _class_metaspace_size;
246 }
247 static void set_class_metaspace_size(size_t metaspace_size) {
248 _class_metaspace_size = metaspace_size;
249 } 238 }
250 239
251 // Debugging 240 // Debugging
252 static int _verify_count; // number of verifies done 241 static int _verify_count; // number of verifies done
253 // True during call to verify(). Should only be set/cleared in verify(). 242 // True during call to verify(). Should only be set/cleared in verify().