On my system (gentoo, Kernel 2.6.31.5, glibc 2.10, gcc 4.3.4, i686, 32 bit)
the attached test program creates an endless loop with 100% cpu usage.
the call to the pthread_mutex_timedlock blocks and strace shows
futex(0x8bd5028, 0x180 /* FUTEX_??? */, 2, {1257295709, 1}) = -1 ENOSYS
(Function not implemented)
repeated endlessly.
statically linked with the 2.9 glibc
the call is
futex(0x804a03c, FUTEX_WAIT_PRIVATE, 2, {0, 999946771}) = -1 ETIMEDOUT
(Connection timed out)
what is to be expected.
0x180 seems to be
FUTEX_TRYLOCK_PI|FUTEX_WAIT_BITSET which cannot be combined.
--
Summary: endless loop in pthread_mutex_timedlock()
Product: glibc
Version: 2.10
Status: NEW
Severity: critical
Priority: P2
Component: nptl
AssignedTo: drepper at redhat dot com
ReportedBy: redhat at linuxhowtos dot org
CC: glibc-bugs at sources dot redhat dot com
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