Re: [GHC] #12537: Parallel cabal builds Segmentation Fault on PowerPC 64-bit

#12537: Parallel cabal builds Segmentation Fault on PowerPC 64-bit -------------------------------------+------------------------------------- Reporter: michelmno | Owner: trommler Type: bug | Status: patch Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: powerpc64 Type of failure: Incorrect result | Test Case: at runtime | Blocked By: 12469 | Blocking: Related Tickets: #14244 | Differential Rev(s): Phab:D3984 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari ): In [changeset:"1130c67bbb6dc06f513e5c8705a488a591fabadb/ghc" 1130c67b/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="1130c67bbb6dc06f513e5c8705a488a591fabadb" PPC NCG: Impl branch prediction, atomic ops. Implement AtomicRMW ops, atomic read, atomic write in PowerPC native code generator. Also implement branch prediction because we need it in atomic ops anyway. This patch improves the issue in #12537 a bit but does not fix it entirely. The fallback operations for atomicread and atomicwrite in libraries/ghc-prim/cbits/atomic.c are incorrect. This patch avoids those functions by implementing the operations directly in the native code generator. This is also what the x86/amd64 NCG and the LLVM backend do. Test Plan: validate on AIX and PowerPC (32-bit) Linux Reviewers: erikd, hvr, austin, bgamari, simonmar Reviewed By: hvr, bgamari Subscribers: rwbarton, thomie GHC Trac Issues: #12537 Differential Revision: https://phabricator.haskell.org/D3984 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12537#comment:15 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler