Fix memory leak in enqueue/dequeue of EventPipe callback data. #58170
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dotnet#56104 made sure provider callback data gets its own copy of filter data. This created a couple of memory leaks when queue/dequeue the callback data since callback data was not correctly freed in these scenarios leading to leaks of the copied filter data. Was detected running the manual EventPipe native unit tests on Windows using its build in use of _CrtMemCheckpoint (only available in debug builds) automatically detecting memory leaks. Fix makes sure callback data is moved into queue on enqueue and moved out in dequeue and that caller of dequeue make sure to free returned callback data using ep_provider_callback_data_fini when done using it. Doing a move instead of copy will also reduce the number of allocations when enqueue/dequeue callback data in provider callback queue.
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//CC @josalem |
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/backport to release/6.0 |
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Started backporting to release/6.0: https://github.com/dotnet/runtime/actions/runs/1173315940 |
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#56104 made sure provider callback data gets its own copy of filter data. This created a couple of memory leaks when queue/dequeue the callback data since callback data was not correctly freed in these scenarios leading to leaks of the copied filter data.
Was detected running the manual EventPipe native unit tests on Windows using its build in use of _CrtMemCheckpoint (only available in debug builds) automatically detecting memory leaks.
Fix makes sure callback data is moved into queue on enqueue and moved out in dequeue and that caller of dequeue make sure to free returned callback data using ep_provider_callback_data_fini when done using it. Doing a move instead of copy will also reduce the number of allocations when enqueue/dequeue callback data in provider callback queue.