8348228: Major performance regression in GetMethodDeclaringClass and other JVMTI Method functions

[zhengyu123]

Please review this patch for the parity of Oracle's JDK-8185348.

Oracle's patch is non-public. This patch is based on @sspitsyn's comments in JDK-8185348 and consistent with JDK9's implementation.

Before patch, slowjvmti test case from JDK-8185348:
16366ms

After patch:
3ms

---

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
• JDK-8348228 needs maintainer approval

Issue

• JDK-8348228: Major performance regression in GetMethodDeclaringClass and other JVMTI Method functions (Bug - P3 - Requested)

Reviewers

• Paul Hohensee (@phohensee - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk8u-dev.git pull/656/head:pull/656
$ git checkout pull/656

Update a local copy of the PR:
$ git checkout pull/656
$ git pull https://git.openjdk.org/jdk8u-dev.git pull/656/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 656

View PR using the GUI difftool:
$ git pr show -t 656

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk8u-dev/pull/656.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back zgu! 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.

[mlbridge]

Webrevs

• 00: Full (d6115500)

[phohensee]

Lgtm.

[openjdk]

⚠️ @zhengyu123 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.