Summary: Introduce a flag that is set when a heap expansion attempt during a GC fails so that we do not consantly attempt to expand the heap when it's going to fail anyway. This not only prevents the excessive ergo output (which is generated when a region allocation fails) but also avoids excessive and ultimately unsuccessful expansion attempts.
Reviewed-by: jmasa, johnc

Summary: Used uintptr_t and void* for all the casts and checks in test_is_in.
Reviewed-by: tonyp, jmasa

Summary: Replaced the code with a ShouldNotReachHere
Reviewed-by: tonyp, jmasa

7123315: instanceKlass::_static_oop_field_count and instanceKlass::_java_fields_count should be u2 type.
Summary: Change instanceKlass::_static_oop_field_count and instanceKlass::_java_fields_count to u2 type.
Reviewed-by: never, bdelsart, dholmes
Contributed-by: NJiangli Zhou <jiangli.zhou@oracle.com>

Summary: In os::free_memory() use mmap with the same attributes as for the heap space
Reviewed-by: kvn
Contributed-by: NAleksey Ignatenko <aleksey.v.ignatenko@intel.com>

Reviewed-by: jcoomes

Summary: Change ClassFileParser::parseClassFile() to use the instanceKlass:_cached_class_file_bytes field to avoid leaking the cache.
Reviewed-by: coleenp, acorn, poonam

Summary: Handle LVT attribute in the class file reconstitutor.
Reviewed-by: phh, coleenp
Contributed-by: Nthomaswue <thomas.wuerthinger@oracle.com>

Summary: Use a percentage of -Xms as min and another percentage of -Xmx as max for the young gen size
Reviewed-by: tonyp, johnc

Summary: Revamp class os's socket method formal args to match socket.h, insert casts in appropriate places, and copyin-copyout int*'s that s/b socklen_t*'s in jvm.cpp.
Reviewed-by: coleenp, dholmes
Contributed-by: erik.gahlin@oracle.com, rickard.backman@oracle.com, nils.loodin@oracle.com, markus.gronlund@oracle.com

Summary: GC crash for explicit stack overflow checks after a C2I transition.
Reviewed-by: coleenp, never
Contributed-by: yang02.wang@sap.com, bertrand.delsart@oracle.com

Summary: Add Flag::external_ext()/writable_ext(), both return false.
Reviewed-by: coleenp, zgu

Summary: Disable verify_heapbase on sparc if TraceBytecodes because the latter uses r12 as a temp register
Reviewed-by: coleenp, phh
Contributed-by: NVolker Simonis <volker.simonis@gmail.com>

Summary: Replaces calls to os::javaTimeMillis(), which does not (and cannot) guarantee monotonicity, in GC code to an equivalent expression that uses os::javaTimeNanos(). os::javaTimeNanos is guaranteed monotonically non-decreasing if the underlying platform provides a monotonic time source. Changes in OS files are to make use of the newly defined constants in globalDefinitions.hpp.
Reviewed-by: dholmes, ysr

Reviewed-by: jcoomes

Summary: Running G1 with ParallelGCThreads==0 results in various crashes and asserts. Most of these are caused by unguarded references to the worker threads array or an incorrect number of active workers.
Reviewed-by: jmasa, tonyp

Summary: Renamed partially-young GCs as mixed and fully-young GCs as young. Change all external output that includes those terms (GC log and GC ergo log) as well as any comments, fields, methods, etc. The changeset also includes very minor code tidying up (added some curly brackets).
Reviewed-by: johnc, brutisso

Summary: Cache workers' calculated starting heap region, used for parallel iteration over the collcection set, for subsequent reuse.
Reviewed-by: tonyp, brutisso