From: "mdalessio (Mike Dalessio) via ruby-core" Date: 2024-02-23T22:22:44+00:00 Subject: [ruby-core:116919] [Ruby master Feature#20290] Add API for C extensions to free memory Issue #20290 has been updated by mdalessio (Mike Dalessio). > > Have you got an example of a particular C extension which needs to free memory in this way? > > I haven���t looked. But if the C extension does initialization with an external library, then it might need this to release that memory at shutdown. I would consider calling libxml2's `xmlCleanupParser` from Nokogiri's `Destruct` function if this feature is made available, because libxml2 keeps some long-lived global state (like character encoding handlers) that would not otherwise be freed. ---------------------------------------- Feature #20290: Add API for C extensions to free memory https://bugs.ruby-lang.org/issues/20290#change-106955 * Author: peterzhu2118 (Peter Zhu) * Status: Open ---------------------------------------- GitHub PR: https://github.com/ruby/ruby/pull/10055 Ticket #19993 added the new feature RUBY_FREE_AT_EXIT, which frees memory in Ruby at shutdown. This allowed tools like Valgrind, ASAN, and macOS leaks to find memory leaks in Ruby without a large number of false-positives outputted. However, this feature is not complete for C extensions, as they may also need to free their memory and there was no way to do so. This means that C extensions might not be able to directly use tools like Valgrind, ASAN, or macOS leaks to find memory leaks. This ticket proposes an API for C extensions to free memory by defining a function called `Destruct_` that is called during shutdown when RUBY_FREE_AT_EXIT is enabled. This name mirrors the `Init_` API that already exists for extension initialization. However, unlike the `Init_` function, `Destruct_` is NOT mandatory for the C extension to implement so that we can preserve backwards compatibility. -- https://bugs.ruby-lang.org/ ______________________________________________ ruby-core mailing list -- ruby-core@ml.ruby-lang.org To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org ruby-core info -- https://ml.ruby-lang.org/mailman3/postorius/lists/ruby-core.ml.ruby-lang.org/