RFR: 8253033: CheckUnhandledOops check fails in ThreadSnapshot::initialize… [v2]

[Leonid Mesnik]

> The NULL oops are corrupted by CheckUnhandledOops and should be re-written with NULL to pass testing
> with -XX:+CheckUnhandledOops.

Leonid Mesnik has updated the pull request incrementally with one additional commit since the last revision:

  8253033: CheckUnhandledOops check fails in ThreadSnapshot::initialize(...)

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/123/files
  - new: https://git.openjdk.java.net/jdk/pull/123/files/0db863a3..c89edef2

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=123&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=123&range=00-01

  Stats: 6 lines in 1 file changed: 2 ins; 4 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/123.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/123/head:pull/123

PR: https://git.openjdk.java.net/jdk/pull/123