Mercurial > hg > truffle
comparison src/share/vm/memory/generation.hpp @ 113:ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
| author | coleenp |
|---|---|
| date | Sun, 13 Apr 2008 17:43:42 -0400 |
| parents | a61af66fc99e |
| children | d1605aabd0a1 12eea04c8b06 |
comparison
equal
deleted
inserted
replaced
| 110:a49a647afe9a | 113:ba764ed4b6f2 |
|---|---|
| 293 // the newly allocated space, if possible, returning the result (or NULL if | 293 // the newly allocated space, if possible, returning the result (or NULL if |
| 294 // the allocation failed). | 294 // the allocation failed). |
| 295 // | 295 // |
| 296 // The "obj_size" argument is just obj->size(), passed along so the caller can | 296 // The "obj_size" argument is just obj->size(), passed along so the caller can |
| 297 // avoid repeating the virtual call to retrieve it. | 297 // avoid repeating the virtual call to retrieve it. |
| 298 // | 298 virtual oop promote(oop obj, size_t obj_size); |
| 299 // The "ref" argument, if non-NULL, is the address of some reference to "obj" | |
| 300 // (that is "*ref == obj"); some generations may use this information to, for | |
| 301 // example, influence placement decisions. | |
| 302 // | |
| 303 // The default implementation ignores "ref" and calls allocate(). | |
| 304 virtual oop promote(oop obj, size_t obj_size, oop* ref); | |
| 305 | 299 |
| 306 // Thread "thread_num" (0 <= i < ParalleGCThreads) wants to promote | 300 // Thread "thread_num" (0 <= i < ParalleGCThreads) wants to promote |
| 307 // object "obj", whose original mark word was "m", and whose size is | 301 // object "obj", whose original mark word was "m", and whose size is |
| 308 // "word_sz". If possible, allocate space for "obj", copy obj into it | 302 // "word_sz". If possible, allocate space for "obj", copy obj into it |
| 309 // (taking care to copy "m" into the mark word when done, since the mark | 303 // (taking care to copy "m" into the mark word when done, since the mark |