8231943: ZGC: Enable serviceability/dcmd/gc/RunGCTest

[satyenme]

Backporting JDK-8231943: ZGC: Enable serviceability/dcmd/gc/RunGCTest. Adjusting test to be compatible with ZGC by slightly shortening output string check. Also cleaning up test by removing redundant "gc=debug". Ran GHA Sanity Checks, local Tier 1 and 2, and adjusted test directly. Patch is clean.

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Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8231943 needs maintainer approval

Issue

• JDK-8231943: ZGC: Enable serviceability/dcmd/gc/RunGCTest (Enhancement - P4 - Requested)

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk11u-dev.git pull/3060/head:pull/3060
$ git checkout pull/3060

Update a local copy of the PR:
$ git checkout pull/3060
$ git pull https://git.openjdk.org/jdk11u-dev.git pull/3060/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 3060

View PR using the GUI difftool:
$ git pr show -t 3060

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk11u-dev/pull/3060.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back ssubramaniam! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @satyenme This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (b4bac69b)

[satyenme]

/approval request for backport of JDK-8231943: ZGC: Enable serviceability/dcmd/gc/RunGCTest

Motivation: Without this change the serviceability/dcmd/gc/RunGCTest test will fail for ZGC. With this backport, the test will pass and increase coverage.

Risk: Low. Ran GHA Sanity Checks, local Tier 1 and 2, and adjusted test directly. Patch is clean. Change has been present in tip since December, 2019. Only test code for a single test.

[openjdk]

@satyenme
8231943: The approval request has been created successfully.