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214 } else { |
214 } else { |
215 return is_in(p); |
215 return is_in(p); |
216 } |
216 } |
217 } |
217 } |
218 |
218 |
219 // Returns "TRUE" iff "p" points into the youngest generation. |
219 // Returns true if the reference is to an object in the reserved space |
220 bool is_in_youngest(void* p); |
220 // for the young generation. |
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221 // Assumes the the young gen address range is less than that of the old gen. |
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222 bool is_in_young(oop p); |
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223 |
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224 #ifdef ASSERT |
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225 virtual bool is_in_partial_collection(const void* p); |
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226 #endif |
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227 |
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228 virtual bool is_scavengable(const void* addr) { |
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229 return is_in_young((oop)addr); |
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230 } |
221 |
231 |
222 // Iteration functions. |
232 // Iteration functions. |
223 void oop_iterate(OopClosure* cl); |
233 void oop_iterate(OopClosure* cl); |
224 void oop_iterate(MemRegion mr, OopClosure* cl); |
234 void oop_iterate(MemRegion mr, OopClosure* cl); |
225 void object_iterate(ObjectClosure* cl); |
235 void object_iterate(ObjectClosure* cl); |
281 // We wanted to assert that:- |
291 // We wanted to assert that:- |
282 // assert(UseParNewGC || UseSerialGC || UseConcMarkSweepGC, |
292 // assert(UseParNewGC || UseSerialGC || UseConcMarkSweepGC, |
283 // "Check can_elide_initializing_store_barrier() for this collector"); |
293 // "Check can_elide_initializing_store_barrier() for this collector"); |
284 // but unfortunately the flag UseSerialGC need not necessarily always |
294 // but unfortunately the flag UseSerialGC need not necessarily always |
285 // be set when DefNew+Tenured are being used. |
295 // be set when DefNew+Tenured are being used. |
286 return is_in_youngest((void*)new_obj); |
296 return is_in_young(new_obj); |
287 } |
297 } |
288 |
298 |
289 // Can a compiler elide a store barrier when it writes |
299 // Can a compiler elide a store barrier when it writes |
290 // a permanent oop into the heap? Applies when the compiler |
300 // a permanent oop into the heap? Applies when the compiler |
291 // is storing x to the heap, where x->is_perm() is true. |
301 // is storing x to the heap, where x->is_perm() is true. |