8160399: is_oop_or_null involves undefined behavior
8164984: Improper use of is_oop in production code
Summary: replace oop->is_oop*() with oopDesc::is_oop*(oop) so this pointer can be verified
Reviewed-by: iklam, kvn, dholmes

8173335: Improve logging for j.l.ref.reference processing
Summary: Add logs for each phases of references and stats for each worker threads
Reviewed-by: tschatzl, shade

8181917: Refactor UL LogStreams to avoid using resource area
Reviewed-by: ehelin, mlarsson

8166276: Refactor gen_process_roots to allow simpler fix for 8165949
Reviewed-by: mgerdin, stefank
Contributed-by: jesper.wilhelmsson@oracle.com, stefan.johansson@oracle.com

8166229: Eliminate ParNew's use of klass_or_null()
Summary: Use list_ptr_from_klass instead of klass_or_null.
Reviewed-by: mgerdin, jmasa

8165292: The gc+task logging is repeated a lot, decreasing the usefulness of -Xlog:gc*=info
Summary: Separate number of workers used debugging information from adaptive worker sizing log messages.
Reviewed-by: ehelin, sjohanss, jmasa

8157907: Incorrect inclusion of atomic.hpp instead of atomic.inline.hpp
Summary: Remove atomic.inline.hpp and move the contents back into atomic.hpp
Reviewed-by: stefank, pliden, simonis

8159073: : Error handling incomplete when creating GC threads lazily
Reviewed-by: drwhite, tschatzl, sangheki

8155257: ParNew/CMS: Clean up promoted object tracking
Reviewed-by: jmasa, ysr

Merge

8149374: Replace C1-specific collection classes with universal collection classes
Reviewed-by: kvn, mgerdin, coleenp

8152632: Rename LogHandle(...) to Log(...)
Reviewed-by: brutisso, mlarsson, rprotacio

8060463: ParNew: SurvivorAlignmentInBytes greater then YoungPLABSize cause assert(obj != NULL || plab->words_remaining() < word_sz) failed: Else should have been able to allocate
Reviewed-by: sangheki, tschatzl, mchernov

8152100: Rework and unify the GC phase logging
Reviewed-by: sjohanss, jwilhelm

8141141: Young and Old gen PLAB stats are similar in output with -XX:+PrintPLAB
Summary: Improve PLAB statistic by adding generation, output values are now in bytes, including units, and split it into multiple messages.
Reviewed-by: brutisso, sjohanss

8146989: Introduce per-worker preserved mark stacks in ParNew
Summary: Unify and provide per-worker preserved mark stack handling in ParNew
Reviewed-by: tschatzl, ysr

8147918: Rename develop_log_is_enabled() to log_develop_is_enabled()
Reviewed-by: dholmes, brutisso

8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
Summary: Fix remaining issues after 8146401. Also fix windows VS2010 linkage problem (g1OopClosures.hpp).
Reviewed-by: stefank, mgerdin

8146690: Make all classes in GC follow the naming convention.
Reviewed-by: dholmes, stefank

8145092: Use Unified Logging for the GC logging
Summary: JEP-271. VM changes contributed by brutisso, test changes contributed by david.
Reviewed-by: sjohanss, david, brutisso
Contributed-by: bengt.rutisson@oracle.com, david.lindholm@oralce.com

Merge

8140424: don't prefix developer and notproduct flag variables with CONST_ in product builds
Reviewed-by: goetz, stefank

8141134: Remove unnecessary pragma warning(disable:4355) from GC code
Reviewed-by: ehelin, simonis, stuefe

8139134: Wrong tenuring threshold in young GC trace event
Reviewed-by: ehelin, jwilhelm
Contributed-by: Carsten Varming <cvarming@twitter.com>

8134953: Make the GC ID available in a central place
Reviewed-by: pliden, jmasa

8134626: Misc cleanups after generation array removal
Reviewed-by: david, dholmes, tschatzl

8067339: PLAB reallocation might result in failure to allocate object in that recently allocated PLAB
Summary: Properly size the PLAB to make sure that the object to allocate always has enough space in it.
Reviewed-by: mgerdin, brutisso

8133470: Uses of Atomic methods in plab.hpp should be moved to .inline.hpp file
Summary: Fix include file dependencies according to general guidelines for plab.hpp
Reviewed-by: ehelin, mgerdin

8087323: Unify and split the work gang classes
Reviewed-by: jmasa, sjohanss

8129961: SIGSEGV when copying to survivor space
Summary: Remove "include_young" parameter from GenCollectedHeap::no_allocs_since_save_marks() since all existing uses pass true to always rescan young gen.
Reviewed-by: jmasa, kbarrett

8079555: REDO - Determining the desired PLAB size adjusts to the the number of threads at the wrong place
Summary: Calculate the desired PLAB value for a single thread and then return desired PLAB size according to the current number of threads when needed
Reviewed-by: jmasa, tschatzl

8077842: Remove the level parameter passed around in GenCollectedHeap
Reviewed-by: kbarrett, mgerdin

8081382: Make flags ParallelGCThreads and ConcGCThreads of type uint
Reviewed-by: drwhite, stefank

8081007: Remove redundant active worker variables and calls in ParNewGeneration::collect
Reviewed-by: pliden, kbarrett, ehelin

8080879: Remove FlexibleWorkGang::set_for_termination
Reviewed-by: brutisso, kbarrett, pliden

8080876: Replace unnecessary MAX2(ParallelGCThreads, 1) calls with ParallelGCThreads
Reviewed-by: kbarrett, mgerdin

8080113: Remove CollectedHeap::set_par_threads()
Reviewed-by: jmasa, kbarrett

8080111: Remove SubTaskDone::_n_threads
Reviewed-by: jmasa, kbarrett

8080110: Remove usage of CollectedHeap::n_par_threads() from root processing
Reviewed-by: jmasa, kbarrett

8079792: GC directory structure cleanup
Reviewed-by: brutisso, stefank, david