Experimental Physics and
Industrial Control System

Margaret Votava <[email protected]> · Fri, 17 Feb 2006 11:35:31 -0600

Dear all,
We are trying to understand a problem with a DESY/DOOCS utility.
It generates a segmentation fault within ca_task_initialize (stack trace
below). The
epicsMutex ca_client_context::defaultServiceInstallMutex;
constructor is not being called in all OS platform/Compiler
combinations.
In particular, a failing combination is
Linux 2.6.8-22.0.2/gcc v3.4.3 (red hat)
Linux 2.6.1/gcc v3.2.3 (red hat)
but works in Solaris with Solaris compiler.
We believe that this is a linker problem.
Has anyone seen before or have any clues of how to fix?
Thank you kindly,
Margaret
### epics code ###
(gdb) where
#0  epicsMutexLock (pmutexNode=0x0)
   at ../../../src/libCom/osi/epicsMutex.cpp:118
#1  0x006add15 in epicsMutex::lock (this=0x0)
   at ../../../src/libCom/osi/epicsMutex.cpp:211
#2  0x00ca19cb in ca_client_context (this=0x8d8ce08,
   enablePreemptiveCallback=false) at ../../../include/epicsGuard.h:68
#3  0x00c88305 in ca_context_create (
   premptiveCallbackSelect=ca_disable_preemptive_callback)
   at ../access.cpp:204
#4  0x00c8835e in ca_task_initialize () at ../access.cpp:180
### doocs code ####
#5 0x00a3e9f5 in epics_init ()

at
/home/votava/smtf/doocs/libs/clientlib/source/clientlib/eq_svr.cc:1928

#6 0x00a464b5 in EqCall (this=0x8d8cc88)

at
/home/votava/smtf/doocs/libs/clientlib/source/clientlib/eq_client.cc:369

#7 0x00e05837 in __static_initialization_and_destruction_0
(__initialize_p=1,

__priority=65535)

at
/home/votava/smtf/doocs/libs/dddlib/source/dddlib/panels/device_attr_stubs.cc:26

#8 0x00e05917 in global constructors keyed to ea ()

at
/home/votava/smtf/doocs/libs/dddlib/source/dddlib/panels/device_attr_stubs.cc:400

#9 0x00e36819 in __do_global_ctors_aux ()

from
/home/votava/smtf/doocs/ups/../ups/../libs/dddlib/ups/../ups/../Linux/lib/libddd.so.2.2.5

#10 0x00d45add in _init ()

from
/home/votava/smtf/doocs/ups/../ups/../libs/dddlib/ups/../ups/../Linux/lib/libddd.so.2.2.5

#11 0x00271318 in _dl_init_internal () from /lib/ld-linux.so.2

#12 0x002657ff in _dl_start_user () from /lib/ld-linux.so.2

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System