8047952: Remove _FORTIFY_SOURCE from fastdebug and slowdebug builds Reviewed-by: dholmes

8054927: Missing MemNode::acquire ordering in some volatile Load nodes Summary: Fixed memory ordering parameter and added missing barriers for volatile loads. Reviewed-by: roland, iveresov

Merge

8054224: Recursive method that was compiled by C1 is unable to catch StackOverflowError Summary: do not update exception cache if exception is replaced when thrown Reviewed-by: kvn, iveresov

8043913: remove legacy code in SPARC's VM_Version::platform_features Summary: Kept only getisax(2) to determine platform features Reviewed-by: kvn, roland Contributed-by: Zoltan Majo <zoltan.majo@oracle.com>

Merge

7173584: Implement arraycopy as a macro node Summary: delay the conversion of arraycopy to stub calls to macro expansion Reviewed-by: kvn, iveresov

8043284: Optimize signed integer comparison Summary: Folding of BoolNode if input add/sub of CmpI overflows and we can prove that compared value is not in the two resulting ranges. Added test for CmpI and CmpU optimizations. Reviewed-by: kvn, rbackman, roland

Merge

8055635: Missing include in g1RegionToSpaceMapper.hpp results in unresolved symbol of fastdebug build without precompiled headers Reviewed-by: mgerdin, ehelin

8055525: Bigapp weblogic+medrec fails to startup after JDK-8038423 Summary: If large pages are enabled and configured in Linux, the VM always pre-commits the entire space. The VM fails verification of the commit of the initial heap because some internal data structure marked all memory pages of the heap as committed during initialization. This makes the code think that we attempted a double-commit during first allocation of the heap. Remove the initial marking of memory pages of the heap to committed. Reviewed-by: mgerdin

Merge

8038423: G1: Decommit memory within heap Summary: Allow G1 to decommit memory of arbitrary regions within the heap and their associated auxiliary data structures card table, BOT, hot card cache, and mark bitmaps. Reviewed-by: mgerdin, brutisso, jwilhelm

8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC Summary: Fill the last card that has been allocated into with a dummy object Reviewed-by: tschatzl, mgerdin

Merge

8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data Summary: Let HeapRegionSeq manage the heap region and auxiliary data to decrease the amount of responsibilities of G1CollectedHeap, and encapsulate this work from other code. Reviewed-by: jwilhelm, jmasa, mgerdin, brutisso

Merge

8055284: sanity/WhiteBox.java fails with NPE Summary: Revert previous change, sanity/WhiteBox.java provides its own sun.hotspot.WhiteBox class. Reviewed-by: ehelin, brutisso Contributed-by: dmitry.fazunenko@oracle.com

8054362: gc/g1/TestEagerReclaimHumongousRegions2.java timeout Summary: Give the test a time limit of approximately one minute so that it exits early on slow machines. Reviewed-by: ehelin, dfazunen, brutisso

Merge

8055275: Several gc/class_unloading/ tests fail due to missed +UnlockDiagnosticVMOptions flag Reviewed-by: mgerdin, jwilhelm

Merge

8026303: CMS: JVM intermittently crashes with "FreeList of size 258 violates Conservation Principle" assert Reviewed-by: tschatzl, brutisso

Merge

8055051: runtime/NMT/CommandLineEmptyArgument.java fails Summary: disable failing test Reviewed-by: ctornqvi, zgu

8054711: [TESTBUG] Enable NMT2 tests after NMT2 is integrated Summary: enable tests for NMT2 Reviewed-by: ctornqvi, zgu

8055061: assert at share/vm/services/virtualMemoryTracker.cpp:332 Error: ShouldNotReachHere() when running NMT tests Summary: Handled CDS mapping region and added test for the scenario Reviewed-by: coleenp, ctornqvi

Merge

8055007: NMT2: emptyStack missing in minimal build Summary: Refactored emptyStack to a static member of NativeCallStack, which is accessible in minimal build. Reviewed-by: coleenp, dholmes

Merge