jmx-dev RFR: 8304074: [JMX] Add an approximation of total bytes allocated on the Java heap by the JVM [v16]

[Paul Hohensee]

> Please review this addition to com.sun.management.ThreadMXBean that returns the total number of bytes allocated on the Java heap since JVM launch by both terminated and live threads.
> 
> Because this PR adds a new interface method, I've updated the JMM_VERSION to 4, but would be happy to update it to 3_1 instead.

Paul Hohensee has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 20 additional commits since the last revision:

 - 8304074: Assign to _add_long_func in add_long_bootstrap
 - Merge branch 'master' into 8304074
 - 8304074: Define FULL_MEM_BARRIER for linux_arm
 - 8304074: set _atomic_add_long_entry = ShouldNotCallThisStub()
 - 8304074: update jmm_GetTotalAllocatedBytes comment
 - 8304074: Use __atomic_add_fetch rather than TBD assembler stub
 - 8304074: getTotalThreadAllocatedBytes name change, increment exited_allocated_bytes in ThreadService::remove_thread, add 64-bit atomic add for linux/bsd_x86, stub out for other platforms
 - Implement 32-bit linux Atomic::add()
 - Implement 32-bit linux Atomic::add()
 - Implement 32-bit linux Atomic::add()
 - ... and 10 more: https://git.openjdk.org/jdk/compare/e38628f9...ab3b9080

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/13814/files
  - new: https://git.openjdk.org/jdk/pull/13814/files/4ce0ede7..ab3b9080

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13814&range=15
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13814&range=14-15

  Stats: 108483 lines in 1798 files changed: 86806 ins; 8865 del; 12812 mod
  Patch: https://git.openjdk.org/jdk/pull/13814.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13814/head:pull/13814

PR: https://git.openjdk.org/jdk/pull/13814