RFR: JDK-8298084: Memory leak in Method::build_profiling_method_data

[Tobias Hartmann]

On Tue, 6 Dec 2022 06:13:23 GMT, Justin King <jcking at openjdk.org> wrote:

> Resolve memory leak related to `MethodData::_extra_data_lock` in `Method::build_profiling_method_data` by defining `MethodData::release_C_heap_structures` and calling it where appropriate before deallocating `MethodData`.

src/hotspot/share/oops/method.cpp line 602:

> 600: 
> 601:   if (!Atomic::replace_if_null(&method->_method_data, method_data)) {
> 602:     method_data->release_C_heap_structures();

What about leaving the `_extra_data_lock` as is and explicitly calling `~MethodData()` here?

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PR: https://git.openjdk.org/jdk/pull/11526