Mercurial > hg > graal-compiler
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 |
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date | Sun, 13 Apr 2008 17:43:42 -0400 |
parents | a61af66fc99e |
children | d1605aabd0a1 12eea04c8b06 |
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110:a49a647afe9a | 113:ba764ed4b6f2 |
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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 |