On Mon, 19 Aug 2024 19:56:26 GMT, Stefan Karlsson <stef...@openjdk.org> wrote:

>> The `ClassLoadingMXBean` and `MemoryMXBean` APIs have `setVerbose` methods 
>> to control verbose mode and `isVerbose` methods to query it. Some JCK tests 
>> expect `setVerbose(false)` to disable verbose mode and, subsequently, 
>> `isVerbose()` to return false. However, if logging to a file is enabled by 
>> using -Xlog on the java launcher command line then `isVerbose()` returns 
>> true even after calling `setVerbose(false)`.
>> 
>> The proposed patch solves this by introducing two changes:
>> 
>> 1) The previous implementation used the `log_is_enabled` functionality to 
>> check if logging was enabled for the given tag set. This returns true if 
>> logging has been turned on for *any* output. The patch changes this so that 
>> `isVerbose` only checks what has been configured for stdout, which is the 
>> output that `setVerbose` configures.
>> 
>> 2) The previous implementation of `setVerbose` turned on `class+load*` 
>> (notice the star) but then `isVerbose` only checked `class+load` (without 
>> the star). The patch changes this so that the `isVerbose` in-effect checks 
>> `class+load*`. (The `gc` part of the patch did not have this problem)
>> 
>> The main focus on this patch is to fix the JCK failure, with an 
>> implementation that follows the API documentation. While looking at this 
>> area of the code it is clear that there are other problems that we might 
>> want to addressed in the future, but we're intentionally keeping this patch 
>> limited in scope so that it can be backported to JDK 23.
>> 
>> A CSR for this change has been created.
>> 
>> Testing:
>> * The newly implemented tests
>> * The failing JCK tests with the corresponding -Xlog lines
>> * Tier1-7 (running)
>> 
>> The patch is co-authored by me and David Holmes
>
> Stefan Karlsson has updated the pull request incrementally with two 
> additional commits since the last revision:
> 
>  - Test -Xlog:gc,gc+init
>  - Review comments

Tests looks good.

-------------

Marked as reviewed by lmesnik (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/20628#pullrequestreview-2246396853

Reply via email to