Mercurial > hg > graal-compiler
comparison src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp @ 237:1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
Summary: allocate alignment-sized page(s) below java heap so that memory accesses at heap_base+1page give signal and cause an implicit null check
Reviewed-by: kvn, jmasa, phh, jcoomes
| author | coleenp |
|---|---|
| date | Sat, 19 Jul 2008 17:38:22 -0400 |
| parents | 9c2ecc2ffb12 |
| children | 850fdf70db2b |
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| 235:9c2ecc2ffb12 | 237:1fdb98a17101 |
|---|---|
| 420 if (vspace != 0) { | 420 if (vspace != 0) { |
| 421 if (vspace->expand_by(bytes)) { | 421 if (vspace->expand_by(bytes)) { |
| 422 return vspace; | 422 return vspace; |
| 423 } | 423 } |
| 424 delete vspace; | 424 delete vspace; |
| 425 // Release memory reserved in the space. | |
| 426 rs.release(); | |
| 425 } | 427 } |
| 426 | 428 |
| 427 return 0; | 429 return 0; |
| 428 } | 430 } |
| 429 | 431 |