8257079: ZGC: Fold ZMark::prepare_mark() into ZMark::start()

[pliden]

Since we no longer have STW roots, ZMark::start() is now just calls perpare_mark() (and does verification), so we can just as well fold perpare_mark() into start().

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed

Testing

	Linux x64	Linux x86	Windows x64	macOS x64
Build	❌ (6/6 failed)	❌ (2/2 failed)	✔️ (2/2 passed)	✔️ (2/2 passed)
Test (tier1)			✔️ (9/9 passed)	✔️ (9/9 passed)

Failed test tasks

• Linux x64 (build debug)
• Linux x64 (build hotspot minimal)
• Linux x64 (build hotspot no-pch)
• Linux x64 (build hotspot optimized)
• Linux x64 (build hotspot zero)
• Linux x64 (build release)
• Linux x86 (build debug)
• Linux x86 (build release)

Issue

• JDK-8257079: ZGC: Fold ZMark::prepare_mark() into ZMark::start()

Reviewers

• Stefan Karlsson (@stefank - Reviewer)
• Albert Mingkun Yang (@albertnetymk - Author)

Download

$ git fetch https://git.openjdk.java.net/jdk pull/1433/head:pull/1433
$ git checkout pull/1433

[bridgekeeper]

👋 Welcome back pliden! 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]

@pliden The following label will be automatically applied to this pull request:

• hotspot-gc

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

[mlbridge]

Webrevs

• 00: Full (d8a47e8)

[openjdk]

@pliden This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8257079: ZGC: Fold ZMark::prepare_mark() into ZMark::start()

Reviewed-by: stefank, ayang

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 12 new commits pushed to the master branch:

• 461c5fc: 8256450: Add gz option to jmap to write a gzipped heap dump
• dee79d6: 8253936: Replace ... with {@code ...} for java.sql
• cfb175d: 8256508: Improve CompileCommand flag
• 7aed9b6: 8256016: Dacapo24H.java failed with "assert(false) failed: unscheduable graph"
• 26e6cb3: 8256489: Make gtest for long path names on Windows more resilient in the presence of virus scanners
• 911f16d: 8257056: Submit workflow should apt-get update to avoid package installation errors
• b0bd0c2: 8256755: Update build.tools.depend.Depend to handle record components in API signatures
• 9aeadbb: 8256865: Foreign Memory Access and Linker API are missing NPE checks
• 8cd2e0f: 8243315: ParallelScavengeHeap::initialize() passes GenAlignment as page size to os::trace_page_sizes instead of actual page size
• cdb41ba: 8255904: Remove superfluous use of reflection in Class::isRecord
• ... and 2 more: https://git.openjdk.java.net/jdk/compare/0d91f0a1df2dbb484e964efa4f1a9500eab799fe...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[pliden]

Thanks for reviewing!

/integrate

[openjdk]

@pliden Since your change was applied there have been 14 commits pushed to the master branch:

• a14f02d: 8256267: Relax compiler/floatingpoint/NaNTest.java for x86_32 and lower -XX:+UseSSE
• 7c73fff: 8256486: Linux/Windows-x86 builds broken after JDK-8254231
• 461c5fc: 8256450: Add gz option to jmap to write a gzipped heap dump
• dee79d6: 8253936: Replace ... with {@code ...} for java.sql
• cfb175d: 8256508: Improve CompileCommand flag
• 7aed9b6: 8256016: Dacapo24H.java failed with "assert(false) failed: unscheduable graph"
• 26e6cb3: 8256489: Make gtest for long path names on Windows more resilient in the presence of virus scanners
• 911f16d: 8257056: Submit workflow should apt-get update to avoid package installation errors
• b0bd0c2: 8256755: Update build.tools.depend.Depend to handle record components in API signatures
• 9aeadbb: 8256865: Foreign Memory Access and Linker API are missing NPE checks
• ... and 4 more: https://git.openjdk.java.net/jdk/compare/0d91f0a1df2dbb484e964efa4f1a9500eab799fe...master

Your commit was automatically rebased without conflicts.

Pushed as commit f3fc0e0.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.