Experimental Physics and
Industrial Control System

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<== Date ==>		<== Thread ==>

Subject:	Segmentation fault(core dumped) Error
From:	ishita bhatia <[email protected]>
To:	EPICS Tech-Talk <[email protected]>
Date:	Fri, 24 Jul 2015 17:27:44 +0530

Hello,

I have created a device support to fetch data from waveform record and this waveform record gets input from asyn record. When I run ioc I get error as Segmentation fault(core dumped).

kindly suggest how to resolve this error.

[srk@srk VME]$ cd iocBoot/iocmyExample/

[srk@srk iocmyExample]$ ./st.cmd

#!../../bin/linux-x86/myExample

## You may have to change myExample to something else

## everywhere it appears in this file

< envPaths

epicsEnvSet("ARCH","linux-x86")

epicsEnvSet("IOC","iocmyExample")

epicsEnvSet("TOP","/home/srk/VME")

epicsEnvSet("ASYN","/home/srk/EPICS/R3.14.12.1/synApps_5_7/support/asyn-4-21")

epicsEnvSet("CALC","/home/srk/EPICS/R3.14.12.1/synApps_5_7/support/calc-3-2")

epicsEnvSet("EPICS_BASE","/home/srk/EPICS/R3.14.12.1/base")

cd /home/srk/VME

## Register all support components

dbLoadDatabase "dbd/myExample.dbd"

myExample_registerRecordDeviceDriver pdbbase

## initialize port for test serial

drvAsynSerialPortConfigure("L2","/dev/ttyS0",0,0,0)

asynSetOption("L2",-1,"baud","19200")

asynSetOption("L2",-1,"bits","8")

asynSetOption("L2",-1,"parity","none")

asynSetOption("L2",-1,"stop","1")

asynSetOption("L2",-1,"clocal","Y")

## Load record instances

dbLoadTemplate "db/userHost.substitutions"

dbLoadRecords "db/dbSubExample.db", "user=srkHost"

dbLoadRecords "db/project.db"

Can't set "wafData.INP" to "vmeInput.BINP"

Error at or before ")" in file "db/project.db" line 29

## Set this to see messages from mySub

#var mySubDebug 1

## Run this to trace the stages of iocInit

#traceIocInit

cd /home/srk/VME/iocBoot/iocmyExample

iocInit

Starting iocInit

############################################################################

## EPICS R3.14.12.1 $Date: Tue 2011-04-26 15:36:19 -0500$

## EPICS Base built Oct 7 2014

############################################################################

iocRun: All initialization complete

## Start any sequence programs

#seq sncExample, "user=srkHost"

../online_notify.c: CA beacon (send to "127.0.0.1:5065") error was "Connection refused"

Value=5

../online_notify.c: CA beacon (send to "127.0.0.1:5065") error was "Connection refused"

Value=5

epics>

Value=5

../online_notify.c: CA beacon (send to "127.0.0.1:5065") error was "Connection refused"

Value=5

Segmentation fault (core dumped)

[srk@srk iocmyExample]$

db file is as follows:

record(asyn, vmeInput) {

field(SCAN, "1 second")

field(DTYP, "asynRecordDevice")

field(FLNK, "wafData")

field(PORT, "L2")

field(TMOD, "Write/Read")

field(IFACE, "asynOctet")

field(AOUT, "ST03@U#PKT01!")

field(OFMT, "ASCII")

field(NRRD, "80")

field(IFMT, "Hybrid")

field(BAUD, "19200")

field(PRTY, "None")

field(DBIT, "8")

field(SBIT, "1")

field(CNCT, "Connect")

field(ENBL, "Enable")

}

record(waveform, wafData) {

field(SCAN, "Passive")

field(DTYP, "wafsupport")

field(INP, "vmeInput.BINP")

field(NELM, "72")

field(FTVL, "CHAR")

field(FLNK, "forwardlink")

}

record(ai, analogInput) {

field(SCAN, ".1 second")

field(DTYP, "aisupport")

}

DEVICE SUPPORT I have created is as follows:

#include <stdio.h>

#include <string.h>

#include <stddef.h>

#include <math.h>

#include <stdlib.h>

#include "alarm.h"

#include "cvtTable.h"

#include "dbDefs.h"

#include "dbAccess.h"

#include "recGbl.h"

#include "recSup.h"

#include "devSup.h"

#include "link.h"

#include "aiRecord.h"

#include "waveformRecord.h"

#include "epicsExport.h"

//static int v=1;

static int v=2,y=3,z;

//long n;

//char myptr[72];

//struct DBADDR *paddr;

static long read_aiValue();

//static long read_aiValue1();

static long read_waveform();

// structure for ai

struct

{

long number;

DEVSUPFUN report;

DEVSUPFUN init;

DEVSUPFUN init_record;

DEVSUPFUN get_ioint_info;

DEVSUPFUN read_aiValue;

DEVSUPFUN special_linconv;

}

devmyai = {

NULL,

read_aiValue,

NULL};

epicsExportAddress(dset,devmyai);

//------------STRUCTURE FOR WAVEFORM---------

struct

{

long number;

DEVSUPFUN report;

DEVSUPFUN init;

DEVSUPFUN init_record;

DEVSUPFUN get_ioint_info;

DEVSUPFUN read_waveform;

}

devmywaveform = {

NULL,

read_waveform};

epicsExportAddress(dset,devmywaveform);

static long read_aiValue(pai)

struct aiRecord *pai;

{

//static int v=2,y=3,z;

pai->val=(v+y);

z=(v+y);

printf("\nValue=%d\n",z);

return(2);

}

static long read_waveform(pwaf)

struct waveformRecord *pwaf;

{

long int n;

char myptr[100];

struct dbAddr *paddr;

//long status,n;

n = pwaf->nelm;

paddr = dbGetPdbAddrFromLink(&pwaf->inp);

dbGet(paddr,pwaf->ftvl,(void *)myptr,0,&n,NULL);

//printf("\nstatus=%s\n",myptr);

return 0;

}

Please help me with this error.

Thanks in advance

Replies:: RE: Segmentation fault(core dumped) Error Mark Rivers

Navigate by Date:: Prev: Re: IOC command from another termianl Vikram Bhagat; Next: RE: Segmentation fault(core dumped) Error Mark Rivers; Index: 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 <2015> 2016 2017 2018 2019 2020 2021 2022 2023 2024
Navigate by Thread:: Prev: Re: IOC command from another termianl Vikram Bhagat; Next: RE: Segmentation fault(core dumped) Error Mark Rivers; Index: 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 <2015> 2016 2017 2018 2019 2020 2021 2022 2023 2024

ANJ, 16 Dec 2015

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System