RFR: 8346143: add ClearAllFramePops function to speedup debugger single stepping in some cases
Serguei Spitsyn
sspitsyn at openjdk.org
Fri Dec 13 20:57:46 UTC 2024
New JVMTI function `ClearAllFramePops` will help to speedup debugger single stepping in some cases.
Additionally, the JVMTI `NotifyFramePop` implementation was fixed to return `JVMTI_ERROR_DUPLICATE` to make it consistent with the `SetBreakpoint` which also returns this error.
The JDWP agent fix will be needed to make use of this new JVMTI function. The corresponding debugger bug is:
[8229012](https://bugs.openjdk.org/browse/JDK-8229012): When single stepping, the debug agent can cause the thread to remain in interpreter mode after single stepping completes
CSR: [8346144](https://bugs.openjdk.org/browse/JDK-8346144): add ClearAllFramePops function to speedup debugger single stepping in some cases
Testing:
- mach5 tiers 1-6 were run to make sure this fix caused no regressions
- Chris tested the JVMTI patch with his JDWP fix of [8229012](https://bugs.openjdk.org/browse/JDK-8229012).
-------------
Commit messages:
- fixed trailing space in jvmtiEnvBase.hpp
- 8346143: add ClearAllFramePops function to speedup debugger single stepping in some cases
Changes: https://git.openjdk.org/jdk/pull/22744/files
Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22744&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8346143
Stats: 132 lines in 10 files changed: 116 ins; 3 del; 13 mod
Patch: https://git.openjdk.org/jdk/pull/22744.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/22744/head:pull/22744
PR: https://git.openjdk.org/jdk/pull/22744
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