Summary: Disallow increasing native memory tracking level
Reviewed-by: hseigel, ctornqvi, gtriantafill

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

Summary: Dynamic allocate _reserved_regions instead of static object to avoid racing during process exit
Reviewed-by: dholmes, coleenp

Summary: Enhance scalability of native memory tracking
Reviewed-by: coleenp, ctornqvi, gtriantafill

Reviewed-by: dholmes, kvn, stefank, twisti

Summary: ARM compilers do not emit FramePointer on each native frame by default
Reviewed-by: dholmes, zgu

Summary: Fixed NMT race condition for realloc, uncommit and release
Reviewed-by: coleenp, ccheung

Summary: Enforce memory limitation on NMT to prevent JVM OOM
Reviewed-by: acorn, dcubed, minqi

Summary: NMT_detail is only supported when frame pointers are not omitted (-fno-omit-frame-pointer).
Reviewed-by: dholmes, cjplummer

Summary: Made NMT query safepoint aware.
Reviewed-by: dholmes, coleenp

8010151: nsk/regression/b6653214 fails "assert(snapshot != NULL) failed: Worker should not be started"
Summary: Fixed a racing condition when shutting down NMT while worker thread is being started, also fixed a few mis-declared volatile pointers.
Reviewed-by: dholmes, dlong

Summary: Fix memory leaks when NMT fails to initialize snapshot and worker thread
Reviewed-by: dcubed, ccheung, rdurbin

8009777: NMT: add new NMT dcmd to control auto shutdown option
Summary: Added diagnostic VM option and DCmd command to allow NMT stay alive under stress situation
Reviewed-by: dcubed, coleenp

Summary: Add WB API functions to enable better NMT testing
Reviewed-by: dholmes, zgu

Summary: Count number of instance classes so that it matches class metadata size
Reviewed-by: coleenp, acorn

Summary: Fixed potential buffer overrun when giving empty option to NativeMemoryTracking commandline option
Reviewed-by: ctornqvi, hseigel, kvn

Summary: Enhanced virtual memory tracking to track committed regions as well as reserved regions, so NMT now can generate virtual memory map.
Reviewed-by: acorn, coleenp

Reviewed-by: kvn, ysr, azeemj

Summary: Solaris only, record stack info to NMT after stack size adjustment was made for primordial threads
Reviewed-by: kvn, acorn, coleenp

7191124: Optimized build is broken due to inconsistent use of DEBUG_ONLY and NOT_PRODUCT macros in NMT
Summary: Updated all related variables and methods to use NOT_PRODUCT macros
Reviewed-by: coleenp, acorn, kvn

Summary: 1) Fixed MemTrackWorker::generations_in_used() calculation 2) Ensured NMT not to leak memory recorders after shutdown 3) Used ThreadCritical to block safepoint safe threads
Reviewed-by: acorn, coleenp, dholmes, kvn

Summary: Changed _query_lock to heap object from static object. Also fixed _query_lock and snapshot lock ranks, so they can participate deadlock detection.
Reviewed-by: coleenp, dholmes, kvn

Summary: Assertion on stack base is not necessary
Reviewed-by: coleenp, dholmes, kvn

7151532: DCmd for hotspot native memory tracking
Summary: Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd
Reviewed-by: acorn, coleenp, fparain