#5111: linux-powerpc : segfault in stage2 compiler
-------------------------+--------------------------------------------------
Reporter: erikd | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.1
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: Linux | Blocking:
Architecture: powerpc | Failure: Installing GHC failed
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Comment(by erikd):
Since the problem was occuring in `GhciMonad.turnOffBuffering` I ran "`gdb
-x commands`" with the file commands file containing:
{{{
file inplace/lib/ghc-stage2
set args +RTS -V0 -i0 -RTS -Binplace/lib --interactive
break GhciMonad_turnOffBuffering_closure
break GhciMonad_turnOffBuffering_info
break GhciMonad_turnOffBuffering_srt
}}}
Running this I still get a new segfault with a backtrace as follows:
{{{
Breakpoint 1 at 0x11bd4274
Breakpoint 2 at 0x1007a760
Breakpoint 3 at 0x11bd4268
(gdb) r
Starting program: /home/erikd/Git/ghc-no-ghci/inplace/lib/ghc-stage2 +RTS
-V0 -i0 -RTS -Binplace/lib --interactive
[Thread debugging using libthread_db enabled]
[New Thread 0xf7dff490 (LWP 1748)]
Program received signal SIGSEGV, Segmentation fault.
0x11acd94c in LOOKS_LIKE_INFO_PTR_NOT_NULL (p=2105675784) at
includes/rts/storage/ClosureMacros.h:225
225 return info->type != INVALID_OBJECT && info->type <
N_CLOSURE_TYPES;
(gdb) bt
#0 0x11acd94c in LOOKS_LIKE_INFO_PTR_NOT_NULL (p=2105675784) at
includes/rts/storage/ClosureMacros.h:225
#1 0x11acd9d4 in LOOKS_LIKE_INFO_PTR (p=2105675784) at
includes/rts/storage/ClosureMacros.h:230
#2 0x11acda3c in LOOKS_LIKE_CLOSURE_PTR (p=0x11bd4274) at
includes/rts/storage/ClosureMacros.h:235
#3 0x11ace45c in evacuate1 (p=0x11bd2c10) at rts/sm/Evac.c:371
#4 0x11aa6d04 in scavenge_large_srt_bitmap (large_srt=0x11bd2d08) at
rts/sm/Scav.c:283
#5 0x11aa6dd8 in scavenge_srt (srt=0x11bd2d08, srt_bitmap=65535) at
rts/sm/Scav.c:310
#6 0x11aa6f3c in scavenge_fun_srt (info=0x10070f1c) at rts/sm/Scav.c:359
#7 0x11aa9098 in scavenge_static () at rts/sm/Scav.c:1506
#8 0x11aa9b2c in scavenge_loop1 () at rts/sm/Scav.c:1879
#9 0x11a9eaec in scavenge_until_all_done () at rts/sm/GC.c:967
#10 0x11a9d0c0 in GarbageCollect (force_major_gc=rtsFalse, gc_type=2,
cap=0x11d63500) at rts/sm/GC.c:371
#11 0x11a8c0e0 in scheduleDoGC (cap=0x11d63500, task=0x11d772d8,
force_major=rtsFalse) at rts/Schedule.c:1427
#12 0x11a8a878 in schedule (initialCapability=0x11d63500, task=0x11d772d8)
at rts/Schedule.c:547
#13 0x11a8cf7c in scheduleWaitThread (tso=0xf7e03d04, ret=0x0,
cap=0x11d63500) at rts/Schedule.c:1914
#14 0x11a7f000 in rts_evalLazyIO (cap=0x11d63500, p=0x11bcca28, ret=0x0)
at rts/RtsAPI.c:494
#15 0x11a829b8 in real_main () at rts/RtsMain.c:63
#16 0x11a82ae8 in hs_main (argc=7, argv=0xffffe1f4,
main_closure=0x11bcca28) at rts/RtsMain.c:111
#17 0x10003888 in main ()
}}}
Debugging continues.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5111#comment:14>
GHC <http://www.haskell.org/ghc/>
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