Date: Sun, 9 Oct 2011 07:11:17 -0700 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: V??clav Zeman <v.haisman@sh.cvut.cz> Cc: kib@freebsd.org, freebsd-stable@freebsd.org Subject: Re: valgrind on FreeBSD? Message-ID: <20111009141117.GA47243@icarus.home.lan> In-Reply-To: <4E91A649.5060207@sh.cvut.cz> References: <4E8CC6BC.9040605@sh.cvut.cz> <20111006064038.CFB34B852@mail.bitblocks.com> <4E91A0C3.7030305@sh.cvut.cz> <4E91A649.5060207@sh.cvut.cz>
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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. As for a workaround: is there some reason you can't just use "ln -s /usr/home /home" and solve the problem? -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, US | | Making life hard for others since 1977. PGP 4BD6C0CB |
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