Experimental Physics and
Industrial Control System
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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: "epicsMutex pthread_mutex_unlock failed" with pyepics/pcaspy |
| From: | Jameson Graef Rollins <[email protected]> |
| To: | Michael Davidsaver <[email protected]>, [email protected] |
| Date: | Wed, 13 May 2015 14:03:45 -0700 |
On Wed, May 13 2015, Michael Davidsaver <[email protected]> wrote: > The thread in question (it's sitting in cantProceed()). It is indeed in > a PCAS call (see below). Yes, I see now. Thanks so much for helping me track this down, Michael! > One odd thing I notice. It seems that GDB finds the debug symbols for > libCom, but not for libcas. It seems unlikely that this would be true > if both libraries were from the same build. Also I note that libca is > being loaded from a slightly different path (symlink?). > >> Reading symbols from /ligo/apps/ubuntu12/epics-3.14.12.2_long/base/lib/linux-x86_64/libCom.so.3.14...done. >> Reading symbols from /ligo/apps/ubuntu12/epics-3.14.12.2_long/base/lib/linux-x86_64/libcas.so.3.14...(no debugging symbols found)...done. > ... >> Reading symbols from /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libca.so.3.14 I think this is just a symlink issue. We have: base -> base-3.14.12.2/ > This might just be a quirk of GDB searching though. Can you check on a > running process ("cat /proc/<pid>/maps") to see which libraries were loaded? I include the full list of loaded EPICS library below [0]. > Also, running "ldd -v _pcas.so" might be interesting. I'm unable to find a .so with this name, and in fact I don't see any object files with the string 'pcas' in the name. I do however see a "_cas.so" that's included with the pcaspy package [1]. >> Thread 1 (Thread 0x7f8658d49700 (LWP 26265)): >> #0 0x00007f8658933d84 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 >> #1 0x00007f86529ed809 in condWait (mutexId=0x301f080, condId=0x301f0a8) at ../../../src/libCom/osi/os/posix/osdEvent.c:75 >> #2 epicsEventWait (pevent=0x301f080) at ../../../src/libCom/osi/os/posix/osdEvent.c:137 >> #3 0x00007f86529ec158 in epicsThreadSuspendSelf () at ../../../src/libCom/osi/os/posix/osdThread.c:557 >> #4 0x00007f86529e2d05 in cantProceed (msg=<optimized out>) at ../../../src/libCom/misc/cantProceed.c:69 >> #5 0x00007f8652568525 in casPVI::getExtServer() const () from /ligo/apps/ubuntu12/epics-3.14.12.2_long/base/lib/linux-x86_64/libcas.so.3.14 >> #6 0x00007f8652c2efa3 in PV::postEvent (this=0x30a0200, value=...) at pcaspy/pv.cpp:83 >> #7 0x00007f8652c1fdc9 in _wrap_PV_postEvent (args=<optimized out>) at pcaspy/casdef_wrap.cpp:9193 >> #8 0x0000000000571b58 in PyEval_EvalFrameEx () Ok! So what's to be done here? Is this a problem in the pcaspy SWIG bindings, or in libcas? I can't see anything obvious that is being called incorrectly: https://bazaar.launchpad.net/~epics-core/epics-base/3.14/view/head:/src/cas/generic/casPVI.cc#L320 jamie. [0] $ sudo cat /proc/2497/maps | grep epics 7ff3f0611000-7ff3f062c000 r-xp 00000000 00:14 83495166 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libdbStaticIoc.so.3.14 7ff3f062c000-7ff3f082b000 ---p 0001b000 00:14 83495166 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libdbStaticIoc.so.3.14 7ff3f082b000-7ff3f082c000 r--p 0001a000 00:14 83495166 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libdbStaticIoc.so.3.14 7ff3f082c000-7ff3f082d000 rw-p 0001b000 00:14 83495166 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libdbStaticIoc.so.3.14 7ff3f082f000-7ff3f086b000 r-xp 00000000 00:14 83495480 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libdbIoc.so.3.14 7ff3f086b000-7ff3f0a6a000 ---p 0003c000 00:14 83495480 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libdbIoc.so.3.14 7ff3f0a6a000-7ff3f0a6c000 r--p 0003b000 00:14 83495480 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libdbIoc.so.3.14 7ff3f0a6c000-7ff3f0a6e000 rw-p 0003d000 00:14 83495480 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libdbIoc.so.3.14 7ff3f0a70000-7ff3f0ad0000 r-xp 00000000 00:14 83494965 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libca.so.3.14 7ff3f0ad0000-7ff3f0ccf000 ---p 00060000 00:14 83494965 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libca.so.3.14 7ff3f0ccf000-7ff3f0cd3000 r--p 0005f000 00:14 83494965 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libca.so.3.14 7ff3f0cd3000-7ff3f0cd5000 rw-p 00063000 00:14 83494965 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libca.so.3.14 7ff3f141f000-7ff3f142c000 r-xp 00000000 00:14 83495846 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libasIoc.so.3.14 7ff3f142c000-7ff3f162b000 ---p 0000d000 00:14 83495846 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libasIoc.so.3.14 7ff3f162b000-7ff3f162c000 r--p 0000c000 00:14 83495846 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libasIoc.so.3.14 7ff3f162c000-7ff3f162d000 rw-p 0000d000 00:14 83495846 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libasIoc.so.3.14 7ff3f162e000-7ff3f166e000 r-xp 00000000 00:14 83498603 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libcas.so.3.14 7ff3f166e000-7ff3f186e000 ---p 00040000 00:14 83498603 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libcas.so.3.14 7ff3f186e000-7ff3f1871000 r--p 00040000 00:14 83498603 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libcas.so.3.14 7ff3f1871000-7ff3f1872000 rw-p 00043000 00:14 83498603 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libcas.so.3.14 7ff3f1872000-7ff3f189f000 r-xp 00000000 00:14 83496980 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libgdd.so.3.14 7ff3f189f000-7ff3f1a9f000 ---p 0002d000 00:14 83496980 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libgdd.so.3.14 7ff3f1a9f000-7ff3f1aa0000 r--p 0002d000 00:14 83496980 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libgdd.so.3.14 7ff3f1aa0000-7ff3f1aa1000 rw-p 0002e000 00:14 83496980 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libgdd.so.3.14 7ff3f1aa1000-7ff3f1af4000 r-xp 00000000 00:14 83494540 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libCom.so.3.14 7ff3f1af4000-7ff3f1cf4000 ---p 00053000 00:14 83494540 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libCom.so.3.14 7ff3f1cf4000-7ff3f1cf7000 r--p 00053000 00:14 83494540 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libCom.so.3.14 7ff3f1cf7000-7ff3f1cf9000 rw-p 00056000 00:14 83494540 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libCom.so.3.14 7ff3f1cfa000-7ff3f1d2a000 r-xp 00000000 00:14 83760456 /ligo/apps/ubuntu12/epics-3.14.12.2_long/pyext/pcaspy-0.4.1/lib/python2.7/site-packages/pcaspy/_cas.so 7ff3f1d2a000-7ff3f1f2a000 ---p 00030000 00:14 83760456 /ligo/apps/ubuntu12/epics-3.14.12.2_long/pyext/pcaspy-0.4.1/lib/python2.7/site-packages/pcaspy/_cas.so 7ff3f1f2a000-7ff3f1f2b000 r--p 00030000 00:14 83760456 /ligo/apps/ubuntu12/epics-3.14.12.2_long/pyext/pcaspy-0.4.1/lib/python2.7/site-packages/pcaspy/_cas.so 7ff3f1f2b000-7ff3f1f2e000 rw-p 00031000 00:14 83760456 /ligo/apps/ubuntu12/epics-3.14.12.2_long/pyext/pcaspy-0.4.1/lib/python2.7/site-packages/pcaspy/_cas.so [1] $ ldd -v /ligo/apps/ubuntu12/epics/pyext/pcaspy-0.4.1/lib/python2.7/site-packages/pcaspy/_cas.so linux-vdso.so.1 => (0x00007ffd619da000) libCom.so.3.14 => /ligo/apps/ubuntu12/epics-3.14.12.2_long/base/lib/linux-x86_64/libCom.so.3.14 (0x00007f3209706000) libgdd.so.3.14 => /ligo/apps/ubuntu12/epics-3.14.12.2_long/base/lib/linux-x86_64/libgdd.so.3.14 (0x00007f32094d7000) libcas.so.3.14 => /ligo/apps/ubuntu12/epics-3.14.12.2_long/base/lib/linux-x86_64/libcas.so.3.14 (0x00007f3209292000) libasIoc.so.3.14 => /ligo/apps/ubuntu12/epics-3.14.12.2_long/base/lib/linux-x86_64/libasIoc.so.3.14 (0x00007f3209083000) libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f3208d6c000) libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f3208b55000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f3208938000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f320857a000) libreadline.so.6 => /lib/x86_64-linux-gnu/libreadline.so.6 (0x00007f3208337000) librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f320812f000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f3207f2b000) libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f3207c2e000) libca.so.3.14 => /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libca.so.3.14 (0x00007f32079c9000) libdbIoc.so.3.14 => /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libdbIoc.so.3.14 (0x00007f3207787000) libdbStaticIoc.so.3.14 => /ligo/apps/ubuntu12/epics-3.14.12.2_long/base-3.14.12.2/lib/linux-x86_64/libdbStaticIoc.so.3.14 (0x00007f3207569000) /lib64/ld-linux-x86-64.so.2 (0x00007f3209b95000) libtinfo.so.5 => /lib/x86_64-linux-gnu/libtinfo.so.5 (0x00007f3207341000) Version information: /ligo/apps/ubuntu12/epics/pyext/pcaspy-0.4.1/lib/python2.7/site-packages/pcaspy/_cas.so: libgcc_s.so.1 (GCC_3.0) => /lib/x86_64-linux-gnu/libgcc_s.so.1 libpthread.so.0 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libpthread.so.0 libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6 libstdc++.so.6 (CXXABI_1.3) => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 libstdc++.so.6 (GLIBCXX_3.4) => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base/lib/linux-x86_64/libCom.so.3.14: libgcc_s.so.1 (GCC_3.0) => /lib/x86_64-linux-gnu/libgcc_s.so.1 librt.so.1 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/librt.so.1 libdl.so.2 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libdl.so.2 libpthread.so.0 (GLIBC_2.3.2) => /lib/x86_64-linux-gnu/libpthread.so.0 libpthread.so.0 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libpthread.so.0 libc.so.6 (GLIBC_2.15) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6 libstdc++.so.6 (CXXABI_1.3) => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 libstdc++.so.6 (GLIBCXX_3.4) => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 libm.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libm.so.6 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base/lib/linux-x86_64/libgdd.so.3.14: libgcc_s.so.1 (GCC_3.0) => /lib/x86_64-linux-gnu/libgcc_s.so.1 libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6 libstdc++.so.6 (CXXABI_1.3) => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 libstdc++.so.6 (GLIBCXX_3.4) => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base/lib/linux-x86_64/libcas.so.3.14: libm.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libm.so.6 libgcc_s.so.1 (GCC_3.0) => /lib/x86_64-linux-gnu/libgcc_s.so.1 libpthread.so.0 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libpthread.so.0 libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6 libstdc++.so.6 (CXXABI_1.3) => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 libstdc++.so.6 (GLIBCXX_3.4) => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 /ligo/apps/ubuntu12/epics-3.14.12.2_long/base/lib/linux-x86_64/libasIoc.so.3.14: libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6 /usr/lib/x86_64-linux-gnu/libstdc++.so.6: libm.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libm.so.6 ld-linux-x86-64.so.2 (GLIBC_2.3) => /lib64/ld-linux-x86-64.so.2 libgcc_s.so.1 (GCC_4.2.0) => /lib/x86_64-linux-gnu/libgcc_s.so.1 libgcc_s.so.1 (GCC_3.3) => /lib/x86_64-linux-gnu/libgcc_s.so.1 libgcc_s.so.1 (GCC_3.0) => /lib/x86_64-linux-gnu/libgcc_s.so.1 libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3.2) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6 /lib/x86_64-linux-gnu/libgcc_s.so.1: libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6 /lib/x86_64-linux-gnu/libpthread.so.0: ld-linux-x86-64.so.2 (GLIBC_2.2.5) => /lib64/ld-linux-x86-64.so.2 ld-linux-x86-64.so.2 (GLIBC_2.3) => /lib64/ld-linux-x86-64.so.2 ld-linux-x86-64.so.2 (GLIBC_PRIVATE) => /lib64/ld-linux-x86-64.so.2 libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3.2) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_PRIVATE) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6 /lib/x86_64-linux-gnu/libc.so.6: ld-linux-x86-64.so.2 (GLIBC_2.3) => /lib64/ld-linux-x86-64.so.2 ld-linux-x86-64.so.2 (GLIBC_PRIVATE) => /lib64/ld-linux-x86-64.so.2 /lib/x86_64-linux-gnu/libreadline.so.6: libc.so.6 (GLIBC_2.11) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6 /lib/x86_64-linux-gnu/librt.so.1: libpthread.so.0 (GLIBC_PRIVATE) => /lib/x86_64-linux-gnu/libpthread.so.0 libpthread.so.0 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libpthread.so.0 libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.3.2) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_PRIVATE) => /lib/x86_64-linux-gnu/libc.so.6 libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6 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- Replies:
- RE: "epicsMutex pthread_mutex_unlock failed" with pyepics/pcaspy Mark Rivers
- Re: "epicsMutex pthread_mutex_unlock failed" with pyepics/pcaspy Michael Davidsaver
- References:
- "epicsMutex pthread_mutex_unlock failed" with pyepics/pcaspy Jameson Graef Rollins
- Re: "epicsMutex pthread_mutex_unlock failed" with pyepics/pcaspy Jameson Graef Rollins
- Re: "epicsMutex pthread_mutex_unlock failed" with pyepics/pcaspy Michael Davidsaver
- Re: "epicsMutex pthread_mutex_unlock failed" with pyepics/pcaspy Jameson Graef Rollins
- Re: "epicsMutex pthread_mutex_unlock failed" with pyepics/pcaspy Michael Davidsaver
- Re: "epicsMutex pthread_mutex_unlock failed" with pyepics/pcaspy Jameson Graef Rollins
- Re: "epicsMutex pthread_mutex_unlock failed" with pyepics/pcaspy Michael Davidsaver
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