#6167: Compile stalls with pause returning ERESTARTNOHAND
---------------------------------+------------------------------------------
Reporter: erikd | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.4.1 | Keywords:
Os: Linux | Architecture: Unknown/Multiple
Failure: Building GHC failed | Testcase:
Blockedby: | Blocking:
Related: |
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I'm using ghc 7.4.1 from the debian package to compile GHC from git HEAD
on linux powerpc.
The build all seems to go fine until it reaches this:
{{{
HC [stage 1] libraries/containers/dist-install/build/Data/Sequence.o
}}}
At which stage the compile stalls. By stalls, I mean the compiler seems to
make no further progress and consumes less than 1% CPU and less than 1%
memory.
Killing the compile with Ctrl-C and running 'make' again and it stalls
again in the same place. Doing a 'make clean' and starting again and it
stall in the same place once more.
The command that is being run at the stall is:
{{{
/home/erikd/Git/ghc-upstream-git/inplace/lib/ghc-stage1 \
-B/home/erikd/Git/ghc-upstream-git/inplace/lib -H64m -O0 -fasm
-package-name \
containers-0.5.0.0 -hide-all-packages -i -ilibraries/containers/. \
-ilibraries/containers/dist-install/build -ilibraries/containers/dist-
install/build/autogen \
-Ilibraries/containers/dist-install/build -Ilibraries/containers/dist-
install/build/autogen \
-Ilibraries/containers/include -optP-include \
-optPlibraries/containers/dist-install/build/autogen/cabal_macros.h
-package array-0.3.0.3 \
-package base-4.5.0.0 -package deepseq-1.2.0.1 -package ghc-
prim-0.2.0.0 -O2 -Wall -XHaskell98 \
-O0 -dcore-lint -no-user-package-db -rtsopts -odir
libraries/containers/dist-install/build \
-hidir libraries/containers/dist-install/build -stubdir
libraries/containers/dist-install/build \
-hisuf hi -osuf o -hcsuf hc -c libraries/containers/./Data/Sequence.hs
-o \
libraries/containers/dist-install/build/Data/Sequence.o
}}}
If I run that under strace I find that at the stall its doing the
following:
{{{
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
pause() = ? ERESTARTNOHAND (To be
restarted)
--- SIGVTALRM (Virtual timer expired) @ 0 (0) ---
sigreturn() = ? (mask now [])
pause() = ? ERESTARTNOHAND (To be
restarted)
--- SIGVTALRM (Virtual timer expired) @ 0 (0) ---
sigreturn() = ? (mask now [])
pause() = ? ERESTARTNOHAND (To be
restarted)
--- SIGVTALRM (Virtual timer expired) @ 0 (0) ---
sigreturn() = ? (mask now [])
pause() = ? ERESTARTNOHAND (To be
restarted)
--- SIGVTALRM (Virtual timer expired) @ 0 (0) ---
}}}
A bit of googling tells me that ERESTARTNOHAND is supposedly a kernel
level
errno that is not supposed to escape into userland. See
https://lkml.org/lkml/2011/12/23/117
Will continue the investigation.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6167>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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