#10383: AArch64: get GHC Calling convention working ----------------------------------------+---------------------------------- Reporter: erikd | Owner: erikd Type: feature request | Status: new Priority: normal | Milestone: 7.12.1 Component: Compiler | Version: 7.11 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: aarch64 Type of failure: Building GHC failed | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: ----------------------------------------+---------------------------------- Comment (by erikd): At @rwbarton's suggestion, compiled this program {{{ main = print $ foldl (+) 0 [1..10000000] }}} with `ghc-stage1 -O0` (to thrash the GC) and the resulting program ran correctly. The problem does not seem to be GC related. Can also compile this program with {{{ inplace/bin/ghc-stage1 -O0 -dynamic hello.hs -o hello }}} and that too runs fine so this is unlikely to be dynamic library loading. Running `inplace/bin/ghc-stage2 +RTS -Ds` results in: {{{ 7fb3bc9000: created capset 0 of type 2 7fb3bc9000: created capset 1 of type 3 7fb3bc9000: cap 0: initialised 7fb3bc9000: assigned cap 0 to capset 0 7fb3bc9000: assigned cap 0 to capset 1 7fb3bc9000: allocated 1 more capabilities 7fb3bc9000: new task (taskCount: 1) 7fb3bc9000: returning; I want capability 0 7fb3bc9000: resuming capability 0 7fb3bc9000: cap 0: created thread 1 7fb3bc9000: new bound thread (1) 7fb3bc9000: cap 0: schedule() 7fb3bc9000: cap 0: running thread 1 (ThreadRunGHC) 7fb3bc9000: cap 0: created thread 2 7fb3bc9000: cap 0: thread 1 stopped (yielding) 7fb3bc9000: giving up capability 0 7fb3bc9000: starting new worker on capability 0 7fb3bc9000: new worker task (taskCount: 2) 7fb39ff1f0: cap 0: schedule() 7fb39ff1f0: cap 0: running thread 2 (ThreadRunGHC) 7fb39ff1f0: cap 0: thread 2 stopped (yielding) 7fb39ff1f0: giving up capability 0 7fb39ff1f0: passing capability 0 to bound task 0x7fb3bc9000 7fb3bc9000: woken up on capability 0 7fb3bc9000: resuming capability 0 7fb3bc9000: cap 0: running thread 1 (ThreadRunGHC) Segmentation fault (core dumped) }}} so the crash happens right after it switches threads. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10383#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler