8177530: Module system implementation refresh (4/2017)
Reviewed-by: lfoltan, sspitsyn
Contributed-by: alan.bateman@oracle.com, harold.seigel@oracle.com, mandy.chung@oracle.com

8172169: Re-examine String field optionality
Reviewed-by: kvn, thartmann

8160487: JVM should validate a module by checking for an instance of java.lang.reflect.Module
Summary: Correct the checking of an instance of java.lang.reflect.Module to validate a module
Reviewed-by: alanb, coleenp, redestad

8148772: VM crash in nsk/jvmti/RedefineClasses/StressRedefine: assert failed: Corrupted constant pool
8151546: nsk/jvmti/RedefineClasses/StressRedefine fails in hs nightly
Summary: ConstantPool::resolve_constant_at_impl() isn't thread safe for MethodHandleInError and MethodTypeInError and Constant pool merging is not thread safe for source_file_name.
Reviewed-by: sspitsyn, dcubed

8142968: Module System implementation
Summary: Initial integration of JEP 200, JEP 260, JEP 261, and JEP 282
Reviewed-by: acorn, ccheung, coleenp, ctornqvi, dholmes, dsimms, gtriantafill, iklam, jiangli, mgronlun, mseledtsov, cjplummer, sspitsyn, stefank, twisti, hseigel, lfoltan, alanb, mchung, dfazunen
Contributed-by: alan.bateman@oracle.com, alex.buckley@oracle.com, jonathan.gibbons@oracle.com, karen.kinnear@oracle.com, mandy.chung@oracle.com, mark.reinhold@oracle.com, harold.seigel@oracle.com, lois.foltan@oracle.com, calvin.cheung@oracle.com, christian.tornqvist@oracle.com, erik.joelsson@oracle.com, george.triantafillou@oracle.com, igor.ignatyev@oracle.com, ioi.lam@oracle.com, james.laskey@oracle.com, jean-francois.denise@oracle.com, jiangli.zhou@oracle.com, markus.gronlund@oracle.com, serguei.spitsyn@oracle.com, staffan.larsen@oracle.com, sundararajan.athijegannathan@oracle.com

8146401: Clean up oop.hpp: add inline directives and fix header files
Reviewed-by: coleenp

8143911: Reintegrate JEP 259: Stack-Walking API
Reviewed-by: coleenp, dfuchs, bchristi, psandoz, sspitsyn
Contributed-by: Mandy Chung <mandy.chung@oracle.com>, Brent Christian <brent.christian@oracle.com>, Daniel Fuchs <daniel.fuchs@oracle.com>, Hamlin Li <huaming.li@oracle.com>

8143931: Back out JDK-8140450
Reviewed-by: coleenp

8140450: Implement JEP 259: Stack-Walking API
Reviewed-by: coleenp, dfuchs, bchristi, psandoz, sspitsyn
Contributed-by: Mandy Chung <mandy.chung@oracle.com>, Brent Christian <brent.christian@oracle.com>, Daniel Fuchs <daniel.fuchs@oracle.com>, Hamlin Li <huaming.li@oracle.com>

8079205: CallSite dependency tracking is broken after sun.misc.Cleaner became automatically cleared
Reviewed-by: roland, psandoz, plevart, kbarrett, jrose

8077936: Remove the unused java_lang_invoke_CallSite::target_volatile
Reviewed-by: vlivanov, jrose

8072911: Remove includes of oop.inline.hpp from .hpp files
Reviewed-by: brutisso, coleenp, jwilhelm, simonis, dholmes