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8067339: PLAB reallocation might result in failure to allocate object in that recently allocated PLAB

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Properly size the PLAB to make sure that the object to allocate always has enough space in it.

Reviewed-by: mgerdin, brutisso
This commit is contained in:
Thomas Schatzl 2015-08-20 15:17:43 +02:00
parent 041c76d48b
commit c91c77abd2
4 changed files with 27 additions and 18 deletions
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3
hotspot/src/share/vm/gc/cms/parNewGeneration.cpp
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@ -248,8 +248,7 @@ HeapWord* ParScanThreadState::alloc_in_to_space_slow(size_t word_sz) {
}
}
if (buf_space != NULL) {
plab->set_word_size(buf_size);
plab->set_buf(buf_space);
plab->set_buf(buf_space, buf_size);
record_survivor_plab(buf_space, buf_size);
obj = plab->allocate_aligned(word_sz, SurvivorAlignmentInBytes);
// Note that we cannot compare buf_size < word_sz below