PowerPC: RTS SMP functions lack memory barriers
@hvr reported on POWER7 big endian (powerpc64) and on AIX (powerpc):
internal error: END_TSO_QUEUE object entered!
(GHC version 8.0.0.20160421 for powerpc64_unknown_linux)Also concprog001 segfaults, which I falsely attributed to #11259 (closed) (no runtime linker support) when I marked the test broken on powerpc64.
I propose to use gcc and clang _sync_* built-ins that are already used in libraries/ghc-prim/cbits/atomic.c instead of CPP ifdefs and inline assembly.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.0.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Runtime System |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | simonmar |
| Operating system | |
| Architecture |