JVM Flags access API #149
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JVM Flags access API #149
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MattAlp
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Nov 6, 2024
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Need to verify a few things with this PR and its interaction with dd-trace-java, will follow-up & approve if no troubles emerge.
| /** | ||
| * Flags interface to access JVM flags. | ||
| * In general, the flags are read-only. However, some flags can be modified at runtime. | ||
| * Currently, only string and boolean flags can be modified. Allowing modification of numeric |
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I would specify as-of details here
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Sorry, I don't understand - what should I specify here?
ddprof-lib/src/main/java/com/datadoghq/profiler/LibraryLoader.java
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ddprof-test/src/test/java/com/datadoghq/profiler/JVMAccessTest.java
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ddprof-test/src/test/java/com/datadoghq/profiler/JavaProfilerTest.java
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….java Co-authored-by: datadog-datadog-prod-us1[bot] <88084959+datadog-datadog-prod-us1[bot]@users.noreply.github.com>
…est.java Co-authored-by: datadog-datadog-prod-us1[bot] <88084959+datadog-datadog-prod-us1[bot]@users.noreply.github.com>
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@MattAlp I have decoupled the library initialization from the profiler initialization. Now, when you don't use profiler only the most important parts will be initialized - basically just the JNI bindings, vmstructs and safeacees. Anything related to JVMTI, capabilities, hooks etc. is registered only when one asks for |
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MattAlp
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What does this PR do?:
It extracts the profiling-independent part of the 'libjavaProfiler' library Java API such that it might be used even if the profiler itself is not used.
It adds a new API for direct access to JVM flags.
Motivation:
The main reason is not be dependent on JMX to eg. read the value of
-XX:ErrorFileetc.Additional Notes:
How to test the change?:
Existing unit/integration tests are passing and added unit tests for the JVM flag access are passing as well.
For Datadog employees:
credentials of any kind, I've requested a review from
@DataDog/security-design-and-guidance.Unsure? Have a question? Request a review!