#8039: RTS linker: unloadObj() does not actually unload the code -------------------------------------+------------------------------------ Reporter: simonmar | Owner: simonmar Type: task | Status: new Priority: high | Milestone: 7.8.1 Component: Runtime System | Version: 7.6.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Comment (by Simon Marlow <marlowsd@…>): In [changeset:bdfefb3b72a71cd0afca6e7766456c0d97c47c86/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="bdfefb3b72a71cd0afca6e7766456c0d97c47c86" Really unload object code when it is safe to do so (#8039) The next major GC after an unloadObj() will do a traversal of the heap to determine whether the object code can be removed from memory or not. We'll keep doing these until it is safe to remove the object code. In my experiments with GHCi, the objects get unloaded immediately, which is a good sign: we're not accidentally holding on to any references anywhere in the GHC data structures. Changes relative to the patch earlier posted on the ticket: - fix two memory leaks discovered with Valgrind, after testing with tests/rts/linker_unload.c }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8039#comment:11> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler