RFR: 8327645: Serial heap dump should not consume double amount of disk space [v2]

[Man Cao]

> Hi all,
> 
> Could anyone review this fix to make serial heap dump only write to a single file?
> We highly appreciate the work in https://bugs.openjdk.org/browse/JDK-8306441. However, many of our customers still need to use serial heap dump, as they have limited disk space and need to dump to a network socket.
> 
> -Man

Man Cao has updated the pull request incrementally with one additional commit since the last revision:

  Fix failure under -XX:+UseSerialGC

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18160/files
  - new: https://git.openjdk.org/jdk/pull/18160/files/64933e30..a1b15ec9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18160&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18160&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18160.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18160/head:pull/18160

PR: https://git.openjdk.org/jdk/pull/18160