8380425: Support markwords in os::print_location

[stooke]

This PR addresses #8380425 by adding support for markwords. A test case is also added.

The current OpenJDK head will print out markwords as part of the oop print code, if the JDK is run with -XX:+WizardMode enabled.

The PR is not ready to be integrated as it will avoid the oop print code if a markword is detected. (i.e., it makes more sense to run this code atfer the oop detection/print code, if WizardMode is not enabled.)

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Integration blocker

 ⚠️ Title mismatch between PR and JBS for issue JDK-8380425

Issue

• JDK-8380425: os::print_location should handle markword printing with COH (Enhancement - P4) ⚠️ Title mismatch between PR and JBS.

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/30627/head:pull/30627
$ git checkout pull/30627

Update a local copy of the PR:
$ git checkout pull/30627
$ git pull https://git.openjdk.org/jdk.git pull/30627/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 30627

View PR using the GUI difftool:
$ git pr show -t 30627

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/30627.diff

[bridgekeeper]

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[openjdk]

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

[openjdk]

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