8301842: JFR: increase checkpoint event size for stacktrace and string pool

[kvergizova]

I'd like to backport JDK-8301842 as a small follow up fix for JDK-8298129 which is already included in 17u.
The patch applies cleanly.
Tested with tier1 and jdk/jfr.

---

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Issue

• JDK-8301842: JFR: increase checkpoint event size for stacktrace and string pool

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[bridgekeeper]

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[openjdk]

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

[openjdk]

@kvergizova 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:

8301842: JFR: increase checkpoint event size for stacktrace and string pool

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At the time when this comment was updated there had been 2 new commits pushed to the master branch:

• 8b30968: 8300205: Swing test bug8078268 make latch timeout configurable
• 17084d5: 8299957: Enhance error logging in instrument coding with additional jplis_assert_msg

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[mlbridge]

Webrevs

• 00: Full (d6ad74b3)

[egahlin]

Have you tried to open .jfr files with earlier versions of JMC?

I tried "jfr print" with JDK 11, and it still works for u4 sized events, but it would be good to confirm it also works with JMC 7 since it uses a different parser than the JDK.

[kvergizova]

I successfully opened new .jfr files with JMC 7.0.0.
As I can see it reads checkpoint size as readInt():
https://hg.openjdk.java.net/jmc/jmc7/file/63ec7d0ee8d9/core/org.openjdk.jmc.flightrecorder/src/main/java/org/openjdk/jmc/flightrecorder/internal/parser/v1/ChunkLoaderV1.java#l100
and readInt() calls readCompressedLong():
https://hg.openjdk.java.net/jmc/jmc7/file/63ec7d0ee8d9/core/org.openjdk.jmc.flightrecorder/src/main/java/org/openjdk/jmc/flightrecorder/internal/parser/v1/SeekableInputStream.java#l236

So it still works for u4 sized events.

[kvergizova]

/integrate

[openjdk]

Going to push as commit fb6d6fe.
Since your change was applied there have been 10 commits pushed to the master branch:

• cf5490b: 8297437: javadoc cannot link to old docs (with old style anchors)
• 334ec9a: 8282958: Rendering Issues with Borders on Windows High-DPI systems
• d2409a7: 8295777: java/net/httpclient/ConnectExceptionTest.java should not rely on system resolver
• 0ce70e3: 8294958: java/net/httpclient/ConnectTimeout tests are slow
• efe8676: 8279614: The left line of the TitledBorder is not painted on 150 scale factor
• 036029e: 8281170: Test jdk/tools/jpackage/windows/WinInstallerIconTest always fails on Windows 11
• 9e26f38: 8300266: Detect Virtualization on Linux aarch64
• 68d7ac5: 8288415: java/awt/PopupMenu/PopupMenuLocation.java is unstable in MacOS machines
• 8b30968: 8300205: Swing test bug8078268 make latch timeout configurable
• 17084d5: 8299957: Enhance error logging in instrument coding with additional jplis_assert_msg

Your commit was automatically rebased without conflicts.

[openjdk]

@kvergizova Pushed as commit fb6d6fe.

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