#12537: Parallel cabal builds Segmentation Fault on PowerPC 64-bit -------------------------------------+------------------------------------- Reporter: michelmno | Owner: Type: bug | Status: new 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: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by michelmno): The trials I made in [comment:7 comment 7] was with ghc 8.0.1 with following patches (as per spec file in OBS https://build.opensuse.org/package/view_file/devel:languages:haskell/ghc/ghc... {{{ # PATCH-FIX-UPSTREAM D2495.patch peter.trommler@ohm-hochschule.de -- Add missing memory barrier on mutable variables. See https://ghc.haskell.org/trac/ghc/ticket/12469 for details. Backport of upstream fix for ghc 8.0.2. Patch27: D2495.patch # PATCH-FIX_UPSTREAM 0001-StgCmmPrim-Add-missing-write-barrier.patch peter.trommler@ohm-hochschule.de -- Add missing write barrier on mutable arrays. Patch28: 0001-StgCmmPrim-Add-missing-write-barrier.patch # PATCH-FIX_UPSTREAM ghc-no-madv-free.patch psimons@suse.com -- Fix "unable to decommit memory: Invalid argument" errors. See https://ghc.haskell.org/trac/ghc/ticket/12495 for details. Patch29: ghc-no-madv-free.patch # PATCH-FIX-UPSTREAM 0001-PPC-CodeGen-fix-lwa-instruction-generation.patch peter.trommler@ohm-hochschule.de -- Fix PPC codegen: Fixes ghc- zeromq4-haskell build on 64-bit PowerPCs Patch30: 0001-PPC-CodeGen-fix-lwa-instruction-generation.patch }}} The core dumps as reported by systemd-coredump are not always at same address (as per journalctl output) {{{ Jan 17 15:27:42 abanc kernel: ghc_worker[12624]: unhandled signal 11 at 38425a003c4c02f4 nip 38425a003c4c02f4 lr 00003fff8da98774 code 30001 Jan 17 15:28:01 abanc systemd-coredump[12677]: Process 12485 (Setup) of user 1000 dumped core. Jan 17 15:31:25 abanc kernel: ghc_worker[12822]: unhandled signal 11 at 0000000000000000 nip 00003fff8430b4f4 lr 00003fff84308774 code 30001 Jan 17 15:31:37 abanc systemd-coredump[12828]: Process 12793 (Setup) of user 1000 dumped core. Jan 17 15:32:34 abanc systemd-coredump[12827]: Process 12795 (ghc) of user 1000 dumped core. Jan 17 15:34:18 abanc systemd-coredump[12676]: Process 12487 (ghc) of user 1000 dumped core. Jan 17 15:42:23 abanc kernel: ghc_worker[14939]: unhandled signal 11 at 0000000000000000 nip 00003fff8122b4f4 lr 00003fff81228774 code 30001 Jan 17 15:42:41 abanc systemd-coredump[15017]: Process 14820 (Setup) of user 1000 dumped core. }}} Trying to analyse one of the core file with gdb refer to SIGSEGV in stg_ap_0_fast as per extract below. I do not know how to continue investigation from there. {{{ + echo 'r -B/usr/lib64/ghc-8.0.1 ' + exec gdb -c /var/lib/systemd/coredump/core.ghc.1000.b44d99385b4c45eb840722189ffdf026.14822.1484667743000000 -x /tmp/gdbparms /usr/lib64/ghc-8.0.1/bin/ghc GNU gdb (GDB; openSUSE Tumbleweed) 7.11.1 ... Reading symbols from /usr/lib64/ghc-8.0.1/bin/ghc...Reading symbols from /usr/lib/debug/usr/lib64/ghc-8.0.1/bin/ghc.debug...done. done. [New LWP 14939] [New LWP 14861] [New LWP 14951] ... [New LWP 14932] [New LWP 14927] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Core was generated by `/usr/lib64/ghc-8.0.1/bin/ghc -B/usr/lib64/ghc-8.0.1 --make -fbuilding-cabal-pac'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x00003fff8122b4f4 in stg_ap_0_fast () from /usr/lib64/ghc-8.0.1/bin/../rts/libHSrts_thr-ghc8.0.1.so [Current thread is 1 (Thread 0x3efdf27ff1a0 (LWP 14939))] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". [New Thread 0x3fffad6df1a0 (LWP 19906)] [New Thread 0x3fffacedf1a0 (LWP 19907)] [New Thread 0x3fffa7fff1a0 (LWP 19908)] ghc: no input files Usage: For basic information, try the `--help' option. [Thread 0x3fffa7fff1a0 (LWP 19908) exited] [Thread 0x3fffacedf1a0 (LWP 19907) exited] [Thread 0x3fffad6df1a0 (LWP 19906) exited] }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12537#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler