Experimental Physics and
Industrial Control System

EPICS Base release 3.14.6 has been available for download since last Friday, but we didn't have the IOC Application Developers Guide in place until today, hence the delayed release announcement. This version of Base contains many minor enhancements and bug fixes, especially to the Channel Access client library, which is significantly more robust and reliable than R3.14.5 was.

There is a known problem with compiling this release against Tornado 2.2, although the failure happens when building a test program after everything required for normal use has been compiled, so this is benign. There may also be an issue when building some extensions using the solaris-sparc-gnu architecture, but that's unconfirmed at present (we hope Janet gets better soon).

Thanks to all the core development team.

- Andrew

Hi all,

at least on all EPICS releases 3.13.2 to 3.13.9, is a bug that causes crashes on PPC iocs. (I have not seen a 68k crash here.)

Bug:

When reading the DTYP field of "pure soft records" such as calc via CA, the CA_client task crashes and leaves the ioc in a state where no further access via CA is possible.

data access
Exception current instruction address: 0x01705f54
Machine Status Register: 0x0000b030
Data Access Register: 0xf0f0f0f0
Condition Register: 0x28000040
Data storage interrupt Register: 0x40000000
Task: 0x17c31f0 "CA_client"

tt

17807c vxTaskEntry    +60 : camsgtask ()
1727a44 camsgtask      +2e4: camessage ()
172a7f0 camessage      +120: read_action ()
17286bc read_action    +e8 : read_reply ()
17284b4 read_reply     +144: db_get_field ()
171f838 .L198          +40 : dbGetField ()
1707650 dbGetField     +164: dbGet ()
1707760 dbGet          +cc : getOptions ()
17065d8 getOptions     +208: get_enum_strs ()

Fix:

*** base/src/db/dbAccess.c.orig Thu Jun  3 18:04:26 2004
--- base/src/db/dbAccess.c      Thu Jun  3 18:10:33 2004
***************
*** 129,134 ****
--- 129,138 ----
                    goto choice_common;
                case DBF_DEVICE:
                    pdbDeviceMenu = (dbDeviceMenu *)pdbFldDes->ftPvt;
+                   if (pdbDeviceMenu == NULL) {
+                       no_str = 0;
+                       goto choice_common;
+                   }
                    no_str = pdbDeviceMenu->nChoice;
                    papChoice = pdbDeviceMenu->papChoice;
                    goto choice_common;

After this fix, calc records and the like report DTYP as 0.

Dirk

--
Dr. Dirk Zimoch
Swiss Light Source
Paul Scherrer Institut
Computing and Controls
phone +41 56 310 5182
fax   +41 56 310 4413

Replies:

Re: EPICS Base Release 3.14.6 Marty Kraimer

References:

EPICS Base Release 3.14.6 Andrew Johnson

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