#14244: ghc-prim: hs_atomicread* and hs_atomicwrite* missing barriers -------------------------------------+------------------------------------- Reporter: trommler | Owner: trommler Type: bug | Status: patch Priority: high | Milestone: 8.4.1 Component: Prelude | Version: 8.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect result | Unknown/Multiple at runtime | Test Case: Blocked By: | Blocking: Related Tickets: #12537 | Differential Rev(s): Phab:D4009 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari <ben@…>): In [changeset:"bd765f4b1332b3d2a7908de3f9ff1d50da0e0b1d/ghc" bd765f4/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="bd765f4b1332b3d2a7908de3f9ff1d50da0e0b1d" Fix atomicread/write operations In `libraries/ghc-prim/cbits/atomic.c` no barriers were issued for atomic read and write operations. Starting with gcc 4.7 compiler intrinsics are offered. The atomic intrinisics are also available in clang. Use these to implement `hs_atomicread*` and `hs_atomicwrite`. Test Plan: validate on OSX and Windows Reviewers: austin, bgamari, simonmar, hvr, erikd, dfeuer Reviewed By: bgamari Subscribers: dfeuer, rwbarton, thomie GHC Trac Issues: #14244 Differential Revision: https://phabricator.haskell.org/D4009 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14244#comment:4> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler