#2398: segfault in cmpLocks on 64 bit multicore
----------------------------+-----------------------------------------------
Reporter: sclv | Owner:
Type: bug | Status: new
Priority: low | Milestone: 6.10.1
Component: Runtime System | Version: 6.8.3
Severity: major | Resolution:
Keywords: | Difficulty: Unknown
Testcase: | Architecture: Unknown
Os: Linux |
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Comment (by sclv):
{{{
> ghc --make -threaded -O2 -debug testfi.hs
> gdb --args ./testfi +RTS -N4
(gdb) run
[Lots of text removed]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x43806950 (LWP 1248)]
0x000000000043990c in cmpLocks (w1=531, w2=1132470304) at
posix/FileLock.c:35
35 return (l1->device == l2->device && l1->inode == l2->inode);
(gdb) bt
#0 0x000000000043990c in cmpLocks (w1=531, w2=1132470304) at
posix/FileLock.c:35
#1 0x0000000000458166 in lookupHashTable (table=0x6ae110, key=1132470304)
at Hash.c:197
#2 0x0000000000439a1d in lockFile (fd=533, dev=2055, ino=10584501,
for_writing=0) at posix/FileLock.c:73
#3 0x000000000040597a in s7AW_info ()
#4 0x0000000600000012 in ?? ()
#5 0x0000000000405e28 in scJ1_info ()
#6 0x0000000000405e10 in scJ1_info ()
#7 0x0000000000444a00 in ?? ()
#8 0x00002aaaaab15c50 in ?? ()
#9 0x0000000000405e40 in scJ1_info ()
#10 0x00002aaaaab15c50 in ?? ()
#11 0x0000000000000000 in ?? ()
}}}
Again this is on an Intel Core 2 Quad. I'm now running it on a 6.9
snapshot from June 15, by the way, and getting the same result. Note that
it seems to happen 75% of the time at least at -N4. At -N3 I'm getting it
25% of the time or so. I'll attach the file I'm using as well, although I
doubt that should have much impact on the results.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2398#comment:5>
GHC <http://www.haskell.org/ghc/>
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