Sponsored Content
Top Forums UNIX for Dummies Questions & Answers Segmentation fault (core dumped) Post 14962 by thehoghunter on Friday 8th of February 2002 10:23:13 AM
Old 02-08-2002
You can get a core dump because of many things. It normally is because of environment variables not being correct. I get the following every time I forget to set my term to vt100 -

$ echo $TERM
dtterm
$ vi /etc/motd
dtterm: Unknown terminal type

[Using open mode]
Segmentation Fault(coredump)
$ ls -l core
-rw-r--r-- 1 tghunter sysadmin 562480 Feb 8 10:13 core
$ file core
core: ELF 32-bit MSB core file SPARC Version 1, from 'vi'


As you can see I tried to vi a file but my term was dtterm instead of vt100 (I was doing a telnet to another server). It dumps a core file which can be removed. Programmers will use core files to check their code when they have a problem. Most admins have a cron job to remove core files from the filesystems (but watch out, some applications have files called somethingcore - removing them causes headaches!)

Example of programmers having problems:
Calls to Performance Library routines cause segmentation faults. What could be wrong and what can I do?

You may be experiencing stack overflow in your program. There are two types of stack space that need to be addressed.

First, there is the stack space allocated to a process. This is controlled by the limit command. Try unlimiting your process stack by saying:

% unlimit stacksize
Secondly, if your program is multi-threaded each thread must have its own stack space. This is controlled by the ${STACKSIZE} environment variable. The units are in KB so saying:

% setenv STACKSIZE 4000
sets each thread's stack size to 4 MB. This is the minimum value that Performance Library requires, so make sure that ${STACKSIZE} is set to at least 4000. You may need to increase this value if your program uses large stack based variables.
thehoghunter
 

10 More Discussions You Might Find Interesting

1. Programming

Segmentation Fault (core dumped)

what r the situations to receive an error msg like the one below Segmentation Fault (core dumped) (2 Replies)
Discussion started by: bankpro
2 Replies

2. UNIX for Advanced & Expert Users

Memory Fault - Core Dumped

I use SCO UNIX 5.07 on a Compaq Proliant Machine. Each time I press the Escape or Delete key while running a program or issuing a FoxBase+ command from the dot prompt, I receive the error message: "Memory Fault - Core Dumped" and the screen locks up immediately. I would appreciate if necessary... (0 Replies)
Discussion started by: bayuz
0 Replies

3. Solaris

Segmentation Fault (core dumped)

i am getting Segmentation Fault (core dumped) on solaris, but when i run the same program with same input on linux it runs successfully. How can i trace the fault in program on solaris. (6 Replies)
Discussion started by: junaid.nehvi
6 Replies

4. Solaris

segmentation fault core dumped

i am getting segmentation fault (core dumped) i tried following things but couldn't understand what is wrong with my prog and where the problem is.... i have only adb debugger available on solaris.... so plz help bash-3.00$ pstack core core 'core' of 765: ./mod_generalised_tapinread... (4 Replies)
Discussion started by: junaid.nehvi
4 Replies

5. Red Hat

Segmentation fault (core dumped)

Hi All, I am getting "Segmentation fault (core dumped)" error in the runtime. I am new this please can you tell me why is that i am getting this error and I am not sure of my compilation : gcc -c avc_test.c gcc -c md5.c gcc avc_test.o md5.o -shared -Llibcoreavc_sdk.so -o proj ... (1 Reply)
Discussion started by: fido.genial
1 Replies

6. Programming

getting Segmentation Fault (core dumped) error but Program runs fine.

i am executing following program int main() { char str; FILE * fp; int i=0; ... (4 Replies)
Discussion started by: bhavesh.sapra
4 Replies

7. UNIX for Advanced & Expert Users

Segmentation Fault/ core dumped in metadb

When I was trying to mirror in my v880 server after OS up gradation from 8 to 10 metadb -afc 3 /dev/dsk/c1t1d0s7 I got an error metadb: Segmentation Fault Segmentation Fault (core dumped) Then I logged a case to Oracle/sun team they suggest "Please could you try metadb -ac 3... (0 Replies)
Discussion started by: taherahmed
0 Replies

8. Programming

C: Memory Fault (core dumped)

When I run programm show this message: Memory Fault (core dumped) Does anyone can help me and tell me what is wrong? please #include <stdlib.h> #include <stdio.h> #include <process.h> #include <unistd.h> #include <sys/types.h> #include <sys/wait.h> int main(int argc, char *argv) { ... (3 Replies)
Discussion started by: ebasse2
3 Replies

9. UNIX and Linux Applications

Tilda Segmentation fault (core dumped)

Can anyone tell me why I keep getting a Segmentation fault when I try to run tilda? $ tilda Segmentation fault (core dumped) It seemed to run after I deleted my tilda directory like this thread said to do. Unfortunately it wouldn't let me set my keybinding with anything I tried. ... (0 Replies)
Discussion started by: cokedude
0 Replies

10. UNIX for Dummies Questions & Answers

Find a string across line break (because of "segmentation fault core dumped")

Hi, thanks to a precedent post, and thanks to the reply of derekludwig of the forum, I have convert my first awk command as : test.txt is : AAAAAGHIJKLAjKMEFJKLjklABCDJkLEFGHIJKL awk -f findstring.awk test.txt > textreturn.txtfindstring.awk is : BEGIN{ SLENGTH = 3 } { ... (3 Replies)
Discussion started by: thewizarde6
3 Replies
ABRT-ACTION-GENERA(1)						    ABRT Manual 					     ABRT-ACTION-GENERA(1)

NAME
abrt-action-generate-core-backtrace - Generates coredump-level backtrace SYNOPSIS
abrt-action-generate-core-backtrace [-v] [-r] [-d DIR] DESCRIPTION
This tool uses coredump from the file coredump and binary at the path stored in file executable in the problem directory to generate coredump-level backtrace. Coredump-level backtrace resembles ordinary backtrace in that it contains information about call frames present on the stack at the time of the crash. However, it only contains information that can be obtained from the coredump without debugging symbols available - mainly relative addresses of the stored instruction pointers. Such backtrace can still be useful for reporting and reproducing the bug and does not require debugging information files to be installed. The result is saved in the problem directory in a file named core_backtrace. Integration with libreport events abrt-action-generate-core-backtrace can be used as an analyzer for application crashes which dump core. Example usage in report_event.conf: EVENT=analyze analyzer=CCpp abrt-action-generate-core-backtrace OPTIONS
-d DIR Path to problem directory. -r Do not hash function fingerprints. Useful for debugging. -v Be more verbose. Can be given multiple times. AUTHORS
o ABRT team abrt 2.1.11 06/18/2014 ABRT-ACTION-GENERA(1)
All times are GMT -4. The time now is 08:32 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy