RFR: 8294160: misc crash dump improvements [v2]

[Dean Long]

> Try to recover and output meaningful information in more situations, such as:
> - when a pointer is in Method metadata memory range, but the memory is not committed
> - when we call a bad address
> 
> When calling a bad address, we usually don't get a meaningful stack backtrace, but in many situations we can if we know where to find the caller information.

Dean Long has updated the pull request incrementally with one additional commit since the last revision:

  revert unneeded changes

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10387/files
  - new: https://git.openjdk.org/jdk/pull/10387/files/a06a47a2..ec02ee5f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10387&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10387&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/10387.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10387/head:pull/10387

PR: https://git.openjdk.org/jdk/pull/10387