[R] C++ streams in shared library in cause R to hang? (linux)
flyfish72 at fastmail.fm
Sat Nov 22 00:41:34 CET 2003
I'm using dyn.load() to load in a shared library compiled for R on linux.
The code does quite a bit (DB accesses, C-style file reads/writes) with
no trouble, but hangs when it reaches code that uses C++ streams,
specifically operator>>() and operator<<(). From the debugger output
(below) it seems like it could be __flockfile() related (maybe a deadlock
of some sort?).
Has anyone encountered anything like this before? Or anything obvious
jump to mind for anyone?
#0 0x40112aa5 in __sigsuspend (set=0xbfffec10)
#1 0x40f63079 in __pthread_wait_for_restart_signal (self=0x40f6bd60)
#2 0x40f64d39 in __pthread_alt_lock (lock=0x9203448, self=0x0) at
#3 0x40f61c16 in __pthread_mutex_lock (mutex=0x9203438) at mutex.c:120
#4 0x40f63e12 in __flockfile (stream=0xbfffefa4) at lockfile.c:39
#5 0x40e35ba8 in read_int () from /usr/lib/libstdc++-libc6.2-2.so.3
#6 0x40e35f58 in istream::operator>> () from
#7 0x4093f2e2 in myFunc () at myfunc.cc:347
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