coleenp [Thu, 11 Jan 2018 21:49:51 -0500] rev 48636
Merge
coleenp [Thu, 11 Jan 2018 18:42:36 -0500] rev 48635
8130039: Move the platform-specific [OS]Semaphore code
8130038: Unify the semaphore usage in os_xxx.cpp
8194763: os::signal_lookup is unused
Reviewed-by: dholmes, kbarrett
dstewart [Thu, 11 Jan 2018 20:25:13 -0500] rev 48634
8194762: JTReg failure of "runtime/NMT/PrintNMTStatistics.java"
Reviewed-by: dholmes, zgu
tschatzl [Thu, 11 Jan 2018 11:28:51 +0100] rev 48633
8129440: G1 crash during concurrent root region scan
Summary: Make concurrent memory accesses to oops on the heap volatile to avoid reloading by the compiler duplicating oop loading code.
Reviewed-by: ehelin, eosterlund
tschatzl [Thu, 11 Jan 2018 11:05:17 +0100] rev 48632
8180280: [TESTBUG] Test for JDK-8180048
Summary: Add test at is executed only at higher tiers to allow more time for execution.
Reviewed-by: kbarrett, eosterlund
tschatzl [Thu, 11 Jan 2018 10:40:01 +0100] rev 48631
8137099: G1 needs to "upgrade" GC within the safepoint if it can't allocate during that safepoint to avoid OoME
Summary: During a minor GC, if memory allocation fails, start a full GC within the same VM operation in the same safepoint. This avoids a race where the GC locker can prevent the full GC from occurring, and a premature OoME.
Reviewed-by: ehelin, sjohanss, phh
Contributed-by: thomas.schatzl@oracle.com, axel.siebenborn@sap.com