Mercurial > hg > truffle
changeset 18697:ee26b8eb1601
Check for overzeroing in the TLAB
| author | Tom Rodriguez <tom.rodriguez@oracle.com> |
|---|---|
| date | Tue, 16 Dec 2014 13:28:33 -0800 |
| parents | b2859128b76a |
| children | abd10b6ef99d |
| files | src/share/vm/memory/threadLocalAllocBuffer.cpp |
| diffstat | 1 files changed, 3 insertions(+), 0 deletions(-) [+] |
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--- a/src/share/vm/memory/threadLocalAllocBuffer.cpp Tue Dec 16 10:20:43 2014 -0800 +++ b/src/share/vm/memory/threadLocalAllocBuffer.cpp Tue Dec 16 13:28:33 2014 -0800 @@ -42,6 +42,9 @@ void ThreadLocalAllocBuffer::clear_before_allocation() { _slow_refill_waste += (unsigned)remaining(); + // In debug mode we expect the storage above top to be uninitialized + // or filled with a padding object. + assert(top() == NULL || *(intptr_t*)top() != 0, "overzeroing detected"); make_parsable(true); // also retire the TLAB }