Summary: A bunch of performance optimizations to decrease GC pause times in G1.
Reviewed-by: apetrusenko, jmasa, iveresov

6791815: Fix for 6471657 can cause deadlock on non-Solaris platforms when initializing direct buffer support
Summary: Place the state transition inside the loop so that the VMThread could proceed for safepoint
Reviewed-by: dholmes, never, acorn

Summary: Fix compilation errors from latest gcc in CC_INTERP including offending missing void* cast.
Reviewed-by: xlu

Summary: The CMS concurrent precleaning and concurrent marking phases should work around classes that are undergoing redefinition.
Reviewed-by: ysr, dcubed

Reviewed-by: phh, xlu

Summary: Added safe_object_iterate() for use by JMapPerm.
Reviewed-by: tonyp

Summary: VM support for deadlock fix. Library fix in 4735126. See API proposal.
Reviewed-by: dholmes, blacklion

Summary: Fixed the wrong cast between types since more restrictions are imposed by gcc 4.3.2
Reviewed-by: jcoomes, acorn, phh, never

6787106: Hotspot 32 bit build fails on platforms having different definitions for intptr_t & int32_t
Summary: Avoid casting between int32_t and intptr_t specifically for MasmAssembler::movptr in 32 bit platforms.
Reviewed-by: jrose, kvn

Summary: Using UseOSErrorReporting will provide both an hs_err file and a crash dump or debug launch and works better.
Reviewed-by: xlu, acorn, poonam

Summary: Replaces SharedRuntime::f2i et al with versions that should work
Reviewed-by: never
Contributed-by: gbenson@redhat.com

6786340: hs14b09a pit: a lot of tests failed in "-server -Xcomp" on solaris-amd64 using fastdebug bits
Summary: Fixes the nsk-jdi PIT failures introduced by fix for 6739363
Reviewed-by: kvn, coleenp

Summary: Relax the assert for Sparc.
Reviewed-by: never

Reviewed-by: jmasa, tonyp

Reviewed-by: jmasa, tonyp

Summary: remove Universe::_fillerArrayKlassObj and associated code
Reviewed-by: jmasa, tonyp

Summary: Restore the code which sets a control edge for a klass load node.
Reviewed-by: never

Summary: Update copyright for files that have been modified starting July 2008 to Dec 2008
Reviewed-by: katleman, ohair, tbell

Reviewed-by: ysr, mchung

Reviewed-by: kvn, jrose

Reviewed-by: rasbold, jrose, kvn

Reviewed-by: rasbold, kvn

Reviewed-by: jmasa

Reviewed-by: jmasa

Reviewed-by: apetrusenko, ysr

Summary: DTrace probe "contended-exit" should be fired before unparking object, or context could be lost. Probe firing was moved to proper place.
Reviewed-by: coleenp, kamg

6736295: SIGSEGV in product jvm, assertion "these are the only valid states during a mark sweep" in fastdebug
Summary: Restructured the code in the perm gen allocation retry loop so as to avoid "safepoint-blocking" on locks, in this case the Heap_lock, while holding uninitialized allocated heap storage.
Reviewed-by: apetrusenko, iveresov, jcoomes, jmasa, poonam

Summary: Make reguard_stack change access to RW, not execute and use os::protect_memory with the new parameter when change needed to X.
Reviewed-by: acorn, jcoomes

Summary: more and better #line and #define directives in the generated code; ADLC itself accepts #line directives
Reviewed-by: never, kvn

Summary: Print out JDK/JRE version that hotspot knows about.
Reviewed-by: kamg, blacklion, acorn, alanb

Summary: temporarily turn off LinkWellKnownClasses optimization
Reviewed-by: never, kvn

Summary: Fix adds support for verifying arguments with -Xcheck:jni.
Reviewed-by: coleenp

Summary: In os::Linux::rebuild_cpu_to_node_map() fix the size of the CPU bitmap. Fixed arithmetic in MutableNUMASpace::adaptive_chunk_size() that could cause overflows and underflows of the chunk_size variable.
Reviewed-by: apetrusenko

Summary: Create new "eliminated" BoxLock node for monitor debug info when corresponding locks are eliminated.
Reviewed-by: never

Summary: Renamed Reference{Policy,Pocessor} methods from snap{,_policy}() to setup{,_policy}()
Reviewed-by: apetrusenko

Reviewed-by: kvn, jrose

6774607: SIGSEGV or (!is_null(v),"oop value can never be zero") assertion when running with CMS and COOPs
Summary: Use the more permissive set_klass_or_null() and klass_or_null() interfaces in ParNew's workqueue overflow code that manipulates the klass-word.
Reviewed-by: coleenp

Summary: The default value of UseVMInterruptibleIO is changed to false for JDK 7, but the default isn't changed for JDK 6 and earlier.
Reviewed-by: never, acorn, dholmes, kamg, alanb

Summary: Add test for biased locking epoch before walking own thread stack in case of rare race
Reviewed-by: phh, never

Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa