Re: [GHC] #15482: the_gc_thread variable from GC.c is not aligned to 64

#15482: the_gc_thread variable from GC.c is not aligned to 64 -------------------------------------+------------------------------------- Reporter: arrowd | Owner: (none) Type: bug | Status: patch Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.4.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: x86_64 | (amd64) Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D5052 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari ): In [changeset:"68a1fc29b4bb3eae54e4d96c9aec20e700040f34/ghc" 68a1fc29/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="68a1fc29b4bb3eae54e4d96c9aec20e700040f34" rts: Align the_gc_thread to 64 bytes In a previous attempt (c6cc93bca69abc258513af8cf2370b14e70fd8fb) I had tried aligning to 8 bytes under the assumption that the problem was that the_gc_thread, a StgWord8[], wasn't being aligned to 8-bytes as the gc_thread struct would expect. However, we actually need even stronger alignment due to the alignment attribute attached to gen_workspace, which claims it should be aligned to a 64-byte boundary. This fixes #15482. Reviewers: erikd, simonmar Reviewed By: simonmar Subscribers: rwbarton, carter GHC Trac Issues: #15482 Differential Revision: https://phabricator.haskell.org/D5052 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15482#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler