Date: Sun, 09 Oct 2011 16:18:48 +0200 From: =?UTF-8?B?VsOhY2xhdiBaZW1hbg==?= <v.haisman@sh.cvut.cz> To: freebsd-stable@freebsd.org Subject: Re: valgrind on FreeBSD? Message-ID: <4E91AD48.5070906@sh.cvut.cz> In-Reply-To: <20111009141117.GA47243@icarus.home.lan> References: <4E8CC6BC.9040605@sh.cvut.cz> <20111006064038.CFB34B852@mail.bitblocks.com> <4E91A0C3.7030305@sh.cvut.cz> <4E91A649.5060207@sh.cvut.cz> <20111009141117.GA47243@icarus.home.lan>
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[-- Attachment #1 --] Jeremy Chadwick wrote, On 9.10.2011 16:11: > On Sun, Oct 09, 2011 at 03:48:57PM +0200, V??clav Zeman wrote: >> V??clav Zeman wrote, On 9.10.2011 15:25: >>> Bakul Shah wrote, On 6.10.2011 8:40: >>>> On Wed, 05 Oct 2011 23:06:04 +0200 =?UTF-8?B?VsOhY2xhdiBaZW1hbg==?= <v.haisman@sh.cvut.cz> wrote: >>>>> Hi. >>>>> >>>>> No matter what I try, valgrind on 7.3-STABLE is giving me this, both Valgrind >>>>> ports: >>>>> >>>>> valgrind: Startup or configuration error: >>>>> Can't establish current working directory at startup >>>>> valgrind: Unable to start up properly. Giving up. >>>>> >>>>> What do I need to do to make it work? >>>> >>>> Try running valgrind under ktrace (& view with kdump). That >>>> will tell you what directory it is trying to access or what >>>> syscall fails and why. >>> Hi. >>> >>> So I have done that and more. I have first updated from 7.3 to 8.2 (RELENG_8 >>> actually). I have not managed to recompile all of the installed Ports yet, >>> but I made sure to recompile valgrind and its dependencies. The same thing >>> has happened! >>> >>> As I have said, I have done the ktrace and here is the interesting bit: >>> >>> 78028 valgrind NAMI "/usr/local/lib/valgrind/memcheck-amd64-freebsd" >>> 78028 memcheck-amd64-free RET execve 0 >>> 78028 memcheck-amd64-free CALL getpid >>> 78028 memcheck-amd64-free RET getpid 78028/0x130cc >>> 78028 memcheck-amd64-free CALL >>> __sysctl(0x39a91450,0x4,0x389a3800,0x39a91468,0,0) >>> 78028 memcheck-amd64-free SCTL "kern.proc.vmmap.78028" >>> 78028 memcheck-amd64-free RET __sysctl 0 >>> 78028 memcheck-amd64-free CALL >>> mmap(0x400009000,0x400000,PROT_READ|PROT_WRITE|PROT_EXEC,MAP_PRIVATE|MAP_FIXED|MAP_ANON,0xffffffffffffffff,0) >>> 78028 memcheck-amd64-free RET mmap 17179906048/0x400009000 >>> 78028 memcheck-amd64-free CALL getrlimit(RLIMIT_DATA,0x39e6a780) >>> 78028 memcheck-amd64-free RET getrlimit 0 >>> 78028 memcheck-amd64-free CALL setrlimit(RLIMIT_DATA,0x39a919e0) >>> 78028 memcheck-amd64-free RET setrlimit 0 >>> 78028 memcheck-amd64-free CALL getrlimit(RLIMIT_STACK,0x39e6a790) >>> 78028 memcheck-amd64-free RET getrlimit 0 >>> 78028 memcheck-amd64-free CALL __getcwd(0x3882d700,0x3ff) >>> 78028 memcheck-amd64-free NAMI ".." >>> 78028 memcheck-amd64-free RET __getcwd -1 errno 2 No such file or directory >>> 78028 memcheck-amd64-free CALL write(0x2,0x3830b060,0x6c) >>> 78028 memcheck-amd64-free GIO fd 2 wrote 108 bytes >>> "valgrind: Startup or configuration error: >>> valgrind: Can't establish current working directory at startup >>> " >>> 78028 memcheck-amd64-free RET write 108/0x6c >>> 78028 memcheck-amd64-free CALL write(0x2,0x3830b060,0x33) >>> 78028 memcheck-amd64-free GIO fd 2 wrote 51 bytes >>> "valgrind: Unable to start up properly. Giving up. >>> " >>> 78028 memcheck-amd64-free RET write 51/0x33 >>> 78028 memcheck-amd64-free CALL exit(0x1) >>> >>> Now what? Why would the __getcwd call be failing with "No such file or >>> directory"? >>> >> It is the nullfs! >> >> I have /home mounted using nullfs to /usr/home: >> >> /usr/home /home nullfs rw,multilabel,acls >> 0 0 >> >> When I run valgrind from the /usr based directory, it works: >> >> shell::wilx:/usr/home/users/wilx/tmp/yttool> valgrind --tool=memcheck ./yttool >> ==34679== Memcheck, a memory error detector >> ==34679== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al. >> ==34679== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info >> ==34679== Command: ./yttool >> ==34679== >> ==34679== >> ==34679== HEAP SUMMARY: >> ==34679== in use at exit: 20,395 bytes in 119 blocks >> ==34679== total heap usage: 6,719 allocs, 6,600 frees, 716,787 bytes allocated >> ==34679== >> ==34679== LEAK SUMMARY: >> ==34679== definitely lost: 0 bytes in 0 blocks >> ==34679== indirectly lost: 0 bytes in 0 blocks >> ==34679== possibly lost: 134 bytes in 4 blocks >> ==34679== still reachable: 20,261 bytes in 115 blocks >> ==34679== suppressed: 0 bytes in 0 blocks >> ==34679== Rerun with --leak-check=full to see details of leaked memory >> ==34679== >> ==34679== For counts of detected and suppressed errors, rerun with: -v >> ==34679== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0) >> >> But when I run it from the nullfs mount, it fails: >> >> shell::wilx:/usr/home/users/wilx/tmp/yttool> cd $HOME/tmp/yttool >> shell::wilx:~/tmp/yttool> valgrind --tool=memcheck ./yttool >> valgrind: Startup or configuration error: >> valgrind: Can't establish current working directory at startup >> valgrind: Unable to start up properly. Giving up. > > Amazing how userland utilities behave differently depending upon the > underlying filesystem type, eh? Good thing I asked what your underlying > filesystem types were. Don't ever think that "it'll all just work". > :-) > > I believe there are other issues/stipulations with nullfs (some have > been reported over the years), so I'm not too surprised by this issue. > I have no idea who currently maintains nullfs(5) either; it looks like a > major group effort given the committers who have touched it in the past > few years: > > http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/fs/nullfs/ > > I'm CC'ing Kostik (kib@) as he might have some ideas. > > If this isn't a known issue, please file a PR for the issue with > nullfs(5). The issue is not within valgrind, so the PR should not be > for that. I have filled a PR: <http://www.freebsd.org/cgi/query-pr.cgi?pr=161424>; > > As for a workaround: is there some reason you can't just use "ln -s > /usr/home /home" and solve the problem? None. I remember using nullfs for /home instead of the link because I just liked that it never has shown /usr there and also because it seemed cooler. :) -- VZ [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iF4EAREIAAYFAk6RrVgACgkQbJlIwZz1OodZdgD9GJHjOqFl8UDa+ZBXhd8JKezR MPxoT6dmvwdQbtZevXcBAMNFay5VaLbFDYi9ncetC+hdBleS+s0gjysjDo1hm8cH =8PFa -----END PGP SIGNATURE-----
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