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comparison src/share/vm/gc_interface/collectedHeap.hpp @ 3377:2aa9ddbb9e60

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7041789: 30% perf regression with c2/arm following 7017732 Summary: Implement a more accurate is_scavengable() Reviewed-by: stefank, jcoomes, ysr
author jmasa
date Tue, 03 May 2011 10:30:34 -0700
parents f95d63e2154a
children 6747fd0512e0
comparison
equal deleted inserted replaced
3373:688202ef6306 3377:2aa9ddbb9e60
267 // NOTE: this actually returns true if "p" is in reserved space 267 // NOTE: this actually returns true if "p" is in reserved space
268 // for the space not that it is actually allocated (i.e. in committed 268 // for the space not that it is actually allocated (i.e. in committed
269 // space). If you need the more conservative answer use is_permanent(). 269 // space). If you need the more conservative answer use is_permanent().
270 virtual bool is_in_permanent(const void *p) const = 0; 270 virtual bool is_in_permanent(const void *p) const = 0;
271 271
272
273 #ifdef ASSERT
274 // Returns true if "p" is in the part of the
275 // heap being collected.
276 virtual bool is_in_partial_collection(const void *p) = 0;
277 #endif
278
272 bool is_in_permanent_or_null(const void *p) const { 279 bool is_in_permanent_or_null(const void *p) const {
273 return p == NULL || is_in_permanent(p); 280 return p == NULL || is_in_permanent(p);
274 } 281 }
275 282
276 // Returns "TRUE" if "p" is in the committed area of "permanent" data. 283 // Returns "TRUE" if "p" is in the committed area of "permanent" data.
282 return p == NULL || is_permanent(p); 289 return p == NULL || is_permanent(p);
283 } 290 }
284 291
285 // An object is scavengable if its location may move during a scavenge. 292 // An object is scavengable if its location may move during a scavenge.
286 // (A scavenge is a GC which is not a full GC.) 293 // (A scavenge is a GC which is not a full GC.)
287 // Currently, this just means it is not perm (and not null). 294 virtual bool is_scavengable(const void *p) = 0;
288 // This could change if we rethink what's in perm-gen.
289 bool is_scavengable(const void *p) const {
290 return !is_in_permanent_or_null(p);
291 }
292 295
293 // Returns "TRUE" if "p" is a method oop in the 296 // Returns "TRUE" if "p" is a method oop in the
294 // current heap, with high probability. This predicate 297 // current heap, with high probability. This predicate
295 // is not stable, in general. 298 // is not stable, in general.
296 bool is_valid_method(oop p) const; 299 bool is_valid_method(oop p) const;