RFR: 8264489: Add more logging to LargeCopyWithMark.java [v2]

[Stefan Karlsson]

> Add more logging to the LargeCopyWithMark.java test, to gather more information when this test fails with OOME. 
> 
> The intention is to gather more info for JDK-8239089.
> 
> I consider this patch trivial, and expect to push it after I've gotten one Review.

Stefan Karlsson has updated the pull request incrementally with one additional commit since the last revision:

  Review Alan

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3282/files
  - new: https://git.openjdk.java.net/jdk/pull/3282/files/a7260c86..1828df10

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3282&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3282&range=00-01

  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3282.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3282/head:pull/3282

PR: https://git.openjdk.java.net/jdk/pull/3282