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Type: Bug
Resolution: Fixed
Priority: P2
Fix Version/s: hs19
Affects Version/s: hs17, 6u19
Component/s: hotspot
Labels:
- verify-pit

Subcomponent:
gc
Introduced In Build:
1.4.2
Introduced In Version:

1.4.2
Resolved In Build:
b01
CPU:

sparc
OS:

solaris, solaris_10
Verification:
Verified

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-2193339	7	Y. Ramakrishna	P2	Closed	Fixed	b94
JDK-2197874	6u23	Y. Ramakrishna	P2	Resolved	Fixed	b01
JDK-2199774	6u22m	Y. Ramakrishna	P2	Resolved	Fixed	b01
JDK-2199484	6u22-rev	Yumin Qi	P2	Closed	Fixed	b05
JDK-2197580	6u21p	Y. Ramakrishna	P2	Resolved	Fixed	b03
JDK-2193020	6u21-rev	Yumin Qi	P2	Closed	Fixed	b08
JDK-2204491	5.0u29	Yumin Qi	P3	Closed	Fixed	b01
JDK-2204492	1.4.2_31	Yumin Qi	P3	Closed	Fixed	b01
JDK-2195904	hs17	Yumin Qi	P2	Closed	Fixed	b18

BOT bulk-updates use memset(). However on Niagara memset() uses BIS
for speed and this exposes concurrent readers to out-of-thin-air zeroes,
which are fatal for concurrent BOT walks. Such concurrent reads of
BOT entries subject to concurrent update are possible with non-contiguous
spaces such as CMS (but not any other current GC in HotSpot).

backported by

JDK-2197580 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

Resolved

JDK-2197874 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

Resolved

JDK-2199774 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

Resolved

JDK-2193020 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

Closed

JDK-2193339 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

Closed

JDK-2195904 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

Closed

JDK-2199484 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

Closed

JDK-2204491 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

Closed

JDK-2204492 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

Closed

relates to

JDK-6872049 CMS: Failure in CompactibleFreeListSpace::block_size from ::block_start_unsafe()

Closed

JDK-6955836 BVF for the bug 6872049

Closed

JDK-8039042 G1: Phantom zeros in cardtable

Resolved

JDK-7192128 G1: Extend fix for 6948537 to G1's BOT

Closed

JDK-7188227 VM should recognize M-series SPARC

Closed

(4 backported by, 5 relates to)

Assignee:: Y. Ramakrishna

Reporter:: Y. Ramakrishna

Votes:: 0 Vote for this issue

Watchers:: 4 Start watching this issue

Created:: 2010-04-29 11:46

Updated:: 2014-05-12 07:02

Resolved:: 2011-03-07 15:17

Imported:: 17/Sep/12 11:11 PM

Indexed:: 17/Aug/12 2:16 AM

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