How to open the core dump file in linux?

Thread Tools Search this Thread
Homework and Emergencies Emergency UNIX and Linux Support How to open the core dump file in linux?
# 8  
Old 12-08-2011
From man core(5):

You can send a process (via the kill command) any of the signals whose corresponding action is "core" listed in that man page. This includes:

The catch is that (1) a process can choose to ignore these signals or handle them without doing a core dump, and (2) the parent shell can limit the core dump through ulimit or other commands.

Up to and including Linux 2.2, the default behaviour for SIGSYS, SIGXCPU, SIGXFSZ, and (on architectures other than SPARC and MIPS) SIGBUS was to terminate the process (without a core dump). (On some other Unices the default action for SIGXCPU and SIGXFSZ is to terminate the process without a core dump.) Linux 2.4 conforms to the POSIX.1-2001 requirements for these signals, terminating the process with a core dump.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Red Hat

Core Dump of a process in Red Hat Linux 5.9

Hello All, I am new joiner of this forum.I am new to Linux shell scripting. At present I have identified 1 application which stalls very frequently (PID is say xyz) and I am not having much information in its application log to identify the root cause of stalling. I need to take the core dump... (19 Replies)
Discussion started by: Anjan Ganguly
19 Replies

2. UNIX for Dummies Questions & Answers

Learn Linux Core Dump Analysis

Can any body provide me some good link to learn to create and analyze linux user mode application / kernel module core dumps? (1 Reply)
Discussion started by: rupeshkp728
1 Replies

3. Solaris

Problems in reading CORE DUMP file with dbx

I am new to UNIX. My Application is using c (.so files) and Java code. My application crashes and CORE DUMP file is generated ,which is huge. Now I want to view the CORE DUMP file to debug the application using dbx without starting process again. By only using the CORE DUMP file and dbx ,can i... (1 Reply)
Discussion started by: satde
1 Replies

4. Linux

Thread specific data from linux core dump

How do i get pointer to thread's local storage or thread specific data while analyzing core dump for linux ? i use pthread_setspecific to store some data in the pthread's local stoare. my multi threaded program on linux crashed, and i want to see what is stored in current running thread's... (2 Replies)
Discussion started by: vishwasungal
2 Replies

5. Shell Programming and Scripting

Cannot generate core dump file

Segmentation fault(core dumped) but I cant find core file any where. how to make it out? I try the command:ulimit -c unlimited, I even added it to the .bashrc file.And I removed ulimit setting in /etc/init.d/function. And there's no ulimit setting in /etc/profile. And I tried sudo find /... (8 Replies)
Discussion started by: vistastar
8 Replies

6. Programming

How to use a core dump file

Hi All, May be it is a stupid question, but, I would like to know what is the advantage using a core dump file at the moment of debugging using gdb. I know a core dump has information about the state of the application when it crashed, but, what is the difference between debugging using the... (2 Replies)
Discussion started by: lagigliaivan
2 Replies

7. Programming

how to view a core dump file

by what name does a core dump file stored??? like i wrote a test code: //dump.c main() { char *p=NULL; printf("%s",p); } of course the above code will produce a segmentation fault. but i cant see any file named core in my CWD. am using SUN0S 5.9 (6 Replies)
Discussion started by: vikashtulsiyan
6 Replies

8. UNIX for Dummies Questions & Answers

core dump file size

Hi All, is there any way to find out the optimal/would be size of the cor dump file generated by the system while a process got terminated abnormally? Basically we have been asked to provide the size of the core dump file being generated by the administrators who maintained the UNIX boxes.... (4 Replies)
Discussion started by: pushp.gahlot
4 Replies

9. UNIX for Dummies Questions & Answers

core dump

I've got a core dump in my weblogic home directory, which i have tried to debug by initiating savecore from /etc/init.d/savecore start but savecore failed to create the two files, that is vmcore.n and vmunix.n. savecore is enable on my server to save vmcore and vmunix in /var/crash/hostname 1)... (4 Replies)
Discussion started by: hassan2
4 Replies

10. UNIX for Dummies Questions & Answers

help, what is the difference between core dump and panic dump?

help, what is the difference between core dump and panic dump? (1 Reply)
Discussion started by: aileen
1 Replies
Login or Register to Ask a Question
SAVECORE(8)						      System Manager's Manual						       SAVECORE(8)

savecore - save a core dump of the operating system SYNOPSIS
savecore dirname [ system ] DESCRIPTION
Savecore is meant to be called at the end of the /etc/rc file. Its function is to save the core dump of the system (if one was made) and to write a reboot message in the shutdown log. It saves the core image in the file dirname/core.n and its corresponding namelist in dirname/unix.n. The second argument is the namelist for the system which made the core image; the current system is always assumed to be /unix. The trailing ".n" in the pathnames is replaced by a number which grows every time savecore is run in that directory. Before savecore writes out a core image, it reads a number from the file dirname/minfree. If there are fewer free blocks on the file sys- tem which contains dirname than the number obtained from the minfree file, the core dump is not done. If the minfree file does not exist, savecore always writes out the core file (assuming that a core dump was taken). Savecore also writes a reboot message in the shut down log. If the system crashed as a result of a panic, savecore records the panic string in the shut down log too. If savecore detects that the system time is wrong because of a crash (the time in the core image is after the current time), it will reset the system time to its best estimate of the time, which is the time in the core image plus the elapsed time since the reboot. It announces the time that it set when this occurs. FILES
/usr/adm/shutdownlogshutdown log /unix current UNIX BUGS
The method used to determine whether a dump is present, and to prevent the same core image from being saved multiple times, is not elegant. This information should be passed to init by the system; however, this is difficult because the system may have to be rebooted a second time if the root filesystem is patched. 3rd Berkeley Distribution SAVECORE(8)