Summary: Added a nop tracing infrastructure, JFR makefile changes and other infrastructure used only by JFR.
Reviewed-by: acorn, sspitsyn
Contributed-by: markus.gronlund@oracle.com

Reviewed-by: acorn, phh, dcubed, sspitsyn

Summary: Expose existing Management::_begin_vm_creation_time via new accessor Management::begin_vm_creation_time().
Reviewed-by: acorn, dcubed

Reviewed-by: sspitsyn, dcubed, mchung, dholmes

Summary: Use JavaThread::jvmti_thread_state() instead of JvmtiThreadState::state_for().
Reviewed-by: coleenp, poonam, acorn

Summary: Add os::get_last_error(), replace getLastErrorString() by os::lasterror() in os_windows.cpp.
Reviewed-by: kamg, dholmes
Contributed-by: erik.gahlin@oracle.com

Summary: Add rdtsc detection and inline generation.
Reviewed-by: kamg, dholmes
Contributed-by: karen.kinnear@oracle.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: 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: 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

Reviewed-by: phh, dcubed

Summary: Fixed G1CollectedHeap::is_in, added tests, cleaned up comments and made Space::is_in pure virtual.
Reviewed-by: brutisso, tonyp, jcoomes

Summary: Provoke a GC for a metadata allocation failure.
Reviewed-by: johnc, iveresov

Summary: An integer underflow can cause the RSet lengths to be massively overpredicted which forces the eden size to the minimum.
Reviewed-by: brutisso, johnc

Summary: UseCompressedOops is false by default on MacOS X; can still be set manually
Reviewed-by: jmelvin, kvn, dholmes