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comparison src/share/vm/memory/sharedHeap.hpp @ 989:148e5441d916

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6863023: need non-perm oops in code cache for JSR 292 Summary: Make a special root-list for those few nmethods which might contain non-perm oops. Reviewed-by: twisti, kvn, never, jmasa, ysr
author jrose
date Tue, 15 Sep 2009 21:53:47 -0700
parents 0fbdb4381b99
children 3fc996d4edd2
comparison
equal deleted inserted replaced
987:00977607da34 989:148e5441d916
163 // a) to return a different value than was returned before the last 163 // a) to return a different value than was returned before the last
164 // call to change_strong_roots_parity, and 164 // call to change_strong_roots_parity, and
165 // c) to never return a distinguished value (zero) with which such 165 // c) to never return a distinguished value (zero) with which such
166 // task-claiming variables may be initialized, to indicate "never 166 // task-claiming variables may be initialized, to indicate "never
167 // claimed". 167 // claimed".
168 private:
168 void change_strong_roots_parity(); 169 void change_strong_roots_parity();
170 public:
169 int strong_roots_parity() { return _strong_roots_parity; } 171 int strong_roots_parity() { return _strong_roots_parity; }
172
173 // Call these in sequential code around process_strong_roots.
174 // strong_roots_prologue calls change_strong_roots_parity, if
175 // parallel tasks are enabled.
176 class StrongRootsScope : public MarkingCodeBlobClosure::MarkScope {
177 public:
178 StrongRootsScope(SharedHeap* outer, bool activate = true);
179 ~StrongRootsScope();
180 };
181 friend class StrongRootsScope;
170 182
171 enum ScanningOption { 183 enum ScanningOption {
172 SO_None = 0x0, 184 SO_None = 0x0,
173 SO_AllClasses = 0x1, 185 SO_AllClasses = 0x1,
174 SO_SystemClasses = 0x2, 186 SO_SystemClasses = 0x2,
196 // "SO_AllClasses" applies the closure to all entries in the SystemDictionary; 208 // "SO_AllClasses" applies the closure to all entries in the SystemDictionary;
197 // "SO_SystemClasses" to all the "system" classes and loaders; 209 // "SO_SystemClasses" to all the "system" classes and loaders;
198 // "SO_Symbols" applies the closure to all entries in SymbolsTable; 210 // "SO_Symbols" applies the closure to all entries in SymbolsTable;
199 // "SO_Strings" applies the closure to all entries in StringTable; 211 // "SO_Strings" applies the closure to all entries in StringTable;
200 // "SO_CodeCache" applies the closure to all elements of the CodeCache. 212 // "SO_CodeCache" applies the closure to all elements of the CodeCache.
201 void process_strong_roots(bool collecting_perm_gen, 213 void process_strong_roots(bool activate_scope,
214 bool collecting_perm_gen,
202 ScanningOption so, 215 ScanningOption so,
203 OopClosure* roots, 216 OopClosure* roots,
217 CodeBlobClosure* code_roots,
204 OopsInGenClosure* perm_blk); 218 OopsInGenClosure* perm_blk);
205 219
206 // Apply "blk" to all the weak roots of the system. These include 220 // Apply "blk" to all the weak roots of the system. These include
207 // JNI weak roots, the code cache, system dictionary, symbol table, 221 // JNI weak roots, the code cache, system dictionary, symbol table,
208 // string table. 222 // string table.
209 void process_weak_roots(OopClosure* root_closure, 223 void process_weak_roots(OopClosure* root_closure,
224 CodeBlobClosure* code_roots,
210 OopClosure* non_root_closure); 225 OopClosure* non_root_closure);
211 226
212 227
213 // Like CollectedHeap::collect, but assume that the caller holds the Heap_lock. 228 // Like CollectedHeap::collect, but assume that the caller holds the Heap_lock.
214 virtual void collect_locked(GCCause::Cause cause) = 0; 229 virtual void collect_locked(GCCause::Cause cause) = 0;