| Subject: | race condition in t/thread.t? |
when testing latest threads, t/thread.t fails randomly on my machine.
ok 25 - Check that rand() is randomized in new threads
ok 26 - coredump in global destruction
ok 27 - fresh_perl - thread sub via scalar
ok 28 - fresh_perl - thread sub via $_[0]
ok 29 - fresh_perl - void eval return
ok 30 - objs clone skip at depth 0
ok 31 - objs clone skip at depth 1
ok 32 - objs clone skip at depth 2
ok 33 - counts of calls to CLONE_SKIP
ok 34 - counts of calls to DESTROY
Show quoted text
---- test stuck here about one time out of 2 ----
when packaging it for mandriva, and sending it on the build system (16
procs), it *always* fails (stuck after test #34). stracing the test gives:
$ strace perl -Iblib/lib -Iblib/arch t/thread.t
[....]
write(1, "ok 33 - counts of calls to CLONE"..., 38ok 33 - counts of
calls to CLONE_SKIP
) = 38
write(1, "ok 34 - counts of calls to DESTR"..., 35ok 34 - counts of
calls to DESTROY
) = 35
rt_sigprocmask(SIG_BLOCK, ~[ILL BUS SEGV RTMIN RT_1], [], 8) = 0
ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo
...}) = 0
lseek(0, 0, SEEK_CUR) = -1 ESPIPE (Illegal seek)
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo
...}) = 0
lseek(1, 0, SEEK_CUR) = -1 ESPIPE (Illegal seek)
ioctl(2, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo
...}) = 0
lseek(2, 0, SEEK_CUR) = -1 ESPIPE (Illegal seek)
clone(child_stack=0x2ba07f004ff0,
flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID,
parent_tidptr=0x2ba07f0059e0, tls=0x2ba07f005710,
child_tidptr=0x2ba07f0059e0) = 21239
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
futex(0xb20aa0, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x2ba064182c5c, FUTEX_WAIT_PRIVATE, 1, NULL
==> this makes me think of a fishy race condition, but i may be wrong.
for the record:
$ perl -V
Summary of my perl5 (revision 5 version 10 subversion 1) configuration:
Platform:
osname=linux, osvers=2.6.22.12-server-1mdv,
archname=x86_64-linux-thread-multi
uname='linux klodia.mandriva.com 2.6.22.12-server-1mdv #1 smp tue
nov 20 13:57:31 est 2007 x86_64 genuine intel(r) cpu 3.20ghz gnulinux '
config_args='-des -Dinc_version_list=5.10.0
5.10.0/x86_64-linux-thread-multi 5.8.8 5.8.7 5.8.6 5.8.5 5.8.4 5.8.3
5.8.2 5.8.1 5.8.0 5.6.1 5.6.0 -Darchname=x86_64-linux
-Dcc=x86_64-mandriva-linux-gnu-gcc -Doptimize=-O2 -g -pipe -Wformat
-Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector
--param=ssp-buffer-size=4 -DDEBUGGING=-g -Dprefix=/usr
-Dvendorprefix=/usr -Dsiteprefix=/usr -Dsitebin=/usr/local/bin
-Dsiteman1dir=/usr/local/share/man/man1
-Dsiteman3dir=/usr/local/share/man/man3 -Dman3ext=3pm -Dcf_by=Mandriva
-Dmyhostname=localhost -Dperladmin=root@localhost
-Dcf_email=root@localhost -Dd_dosuid -Ud_csh -Duseshrplib -Duseithreads
-Di_db -Di_ndbm -Di_gdbm'
hint=recommended, useposix=true, d_sigaction=define
useithreads=define, usemultiplicity=define
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
use64bitint=define, use64bitall=define, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='x86_64-mandriva-linux-gnu-gcc', ccflags ='-D_REENTRANT
-D_GNU_SOURCE -fno-strict-aliasing -pipe -fstack-protector
-I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2 -g -pipe -Wformat -Werror=format-security
-Wp,-D_FORTIFY_SOURCE=2 -fstack-protector --param=ssp-buffer-size=4',
cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe
-fstack-protector -I/usr/local/include'
ccversion='', gccversion='4.4.2', gccosandvers=''
intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='x86_64-mandriva-linux-gnu-gcc', ldflags =' -fstack-protector
-L/usr/local/lib64'
libpth=/usr/local/lib64 /lib64 /usr/lib64
libs=-lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -lc
-lgdbm_compat
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
libc=/lib/libc-2.11.so, so=so, useshrplib=true, libperl=libperl.so
gnulibc_version='2.11'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E
-Wl,-rpath,/usr/lib/perl5/5.10.1/x86_64-linux-thread-multi/CORE'
cccdlflags='-fPIC', lddlflags='-shared -O2 -g -pipe -Wformat
-Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector
--param=ssp-buffer-size=4 -L/usr/local/lib64'
Characteristics of this binary (from libperl):
Compile-time options: MULTIPLICITY PERL_DONT_CREATE_GVSV
PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP
USE_64_BIT_ALL
USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES
USE_PERLIO USE_REENTRANT_API
Locally applied patches:
Mandriva Linux patches
Built under linux
Compiled at Dec 17 2009 05:38:24
@INC:
/usr/lib/perl5/site_perl/5.10.1/x86_64-linux-thread-multi
/usr/lib/perl5/site_perl/5.10.1
/usr/lib/perl5/vendor_perl/5.10.1/x86_64-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.10.1
/usr/lib/perl5/5.10.1/x86_64-linux-thread-multi
/usr/lib/perl5/5.10.1
/usr/lib/perl5/site_perl
/usr/lib/perl5/vendor_perl/5.10.0
/usr/lib/perl5/vendor_perl/5.10.0/x86_64-linux-thread-multi
/usr/lib/perl5/vendor_perl
.