Prevent unbounded memory growth in long-running profilers#327

Merged

jbachorik merged 33 commits intomainfrom

jb/linenumber_leak

Jan 13, 2026

Commits on Jan 12, 2026

Fix GetLineNumberTable JVMTI memory leak

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Document profiler memory requirements and AGCT constraints
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Fix GetLineNumberTableLeakTest to detect JVMTI leaks

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Fix NumberFormatException handling in NativeMemoryTracking

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Update ddprof-test/src/test/java/com/datadoghq/profiler/memleak/GetLineNumberTableLeakTest.java

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Update ddprof-test/src/test/java/com/datadoghq/profiler/memleak/GetLineNumberTableLeakTest.java

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Update ddprof-test/src/test/java/com/datadoghq/profiler/memleak/GetLineNumberTableLeakTest.java

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Update ddprof-test/src/test/java/com/datadoghq/profiler/memleak/GetLineNumberTableLeakTest.java

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Update ddprof-test/src/test/java/com/datadoghq/profiler/memleak/GetLineNumberTableLeakTest.java

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Update ddprof-test/src/test/java/com/datadoghq/profiler/memleak/GetLineNumberTableLeakTest.java

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Fix test comment to reflect actual restart interval (5 vs 200) (#329)

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PR cleanup
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Log a JVMTI error during attempt to deallocate linenumber table
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Implement age-based method_map cleanup to prevent unbounded growth

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Update memory docs with method_map cleanup implementation

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Remove stop/restart test, enable NMT by default

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Remove bogus plateau detection logic from test

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Allow class unloading for better memory behavior

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Update test javadoc to reflect actual behavior

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Add comparison test to validate cleanup effectiveness

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Lower comparison test threshold to 10%

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Commits on Jan 13, 2026