RFR(XS): 8214235: assertion in collectedHeap.cpp: attempt to clean empty remainder (original) (raw)
Boris Ulasevich boris.ulasevich at bell-sw.com
Thu Nov 29 11:02:27 UTC 2018
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Hi Per,
On 28.11.2018 17:35, Per Liden wrote:
Hi,
On 11/28/18 1:39 PM, Boris Ulasevich wrote: Hi all,
Please review a simple fix: do not fill remaining tlab memory when the remainder is empty. Hmm I get the feeling something else is wrong here. Like a misaligned object or a misaligned object size was allocated in the TLAB.
Actually assertion check catches the case when top() = end(). I do not think it is something criminal. May be it is better to add check (top() < hard_end()) instead: http://cr.openjdk.java.net/~bulasevich/8214235/webrev.00
When you crash here it would be interesting to see what the tlab start/end/top/etc is and what MinObjAlignement is being used.
TLAB: start()=0x938b0b28, end()=0x938dcdc8, top()=0x938dcdc8 MinObjAlignment: 2
cheers, Per
https://bugs.openjdk.java.net/browse/JDK-8214235 http://cr.openjdk.java.net/~bulasevich/8214235/webrev.01 Thanks, Boris
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