Sponsored Content
Operating Systems Solaris How to create core through program at the time of crash by handling signals? Post 302740833 by rajeev_ks on Friday 7th of December 2012 12:04:56 AM
Old 12-07-2012
Quote:
Originally Posted by jim mcnamara
The simple way to get a core that "starts" at the fault is not to block signals. Obviously this has some very bad downsides.

Otherwise with what you have done you have to traverse stack frames back to the problem, in gdb this is the
Code:
backtrace

command. Signal receipt when blocked causes an immediate interrupt to the executing code, pushing the state of the process and kernel onto the interrupt stack. Working backwards can be fun.

Some example code for gaddr2line():

Note that you should consider libelf instead of the python library.
I am using dbx for debugging core and the corresponding command for backtrace is where in dbx. But as I said earlier I am getting the stack of signal handler routine through backtrace and not the location of faulty code.
 

10 More Discussions You Might Find Interesting

1. Programming

handling-create new SIGNALS

Hi, i cannot find in which file and function the signals are handled by default.Can anyone help me? How can i create a 33th signal? Thanks (3 Replies)
Discussion started by: Panos
3 Replies

2. UNIX for Dummies Questions & Answers

Smart Crash Handling

Hi, Is there anything you can do to a *nix (SuSE Linux actually) which allows it to *try* to do a reboot if something crashes the system? I know they have something at work (but I don't work with the servers myself) which makes the server reboot if it crashes/locks (works about 80% of the... (0 Replies)
Discussion started by: d11wtq
0 Replies

3. Shell Programming and Scripting

Shel program file handling

Hi, Iam having the file as follows: QWASEDRF1234567890098765 abc@quebex.com 000000000-932333 678394-56=3 9033894 QWASEDRF1234567890098765 abc@quebex.com 000000000-932333 678394-56=3 9033894 OPIUYTREE0986666544443322 dcsx@olivaa.net ... (14 Replies)
Discussion started by: nivas
14 Replies

4. Filesystems, Disks and Memory

/dev/core "link to program crash data"

Hi there, I found a link to a file /dev/core of 17 GB Is it ok??? I couldn't find many information about it. Any suggestion would be appreciated!!! Thanks in advance, Giordano Bruno PS: I'm working with FEDORA 6 (2 Replies)
Discussion started by: Giordano Bruno
2 Replies

5. Programming

detached thread is causing program crash

Hi All, I have scenario where my callback function data_update() can be called anytime. I have written the function data_update() such that it will create detached thread for processing the data sent to this function. data_update() { pthread_attr_t attr_thread; ... (1 Reply)
Discussion started by: wonderman
1 Replies

6. Programming

Memory Fault (core dumped) in ttpy program

I´m writing this program in QNX , I`m kinda new to UNIX and programing in general, and when I try to run it it gives me the Memory Fault error. Can anyone help? #include <stdio.h> #include <fcntl.h> void main(void) {int a,ter; char buf; printf("a="); scanf("%d",a); ter=open... (6 Replies)
Discussion started by: GiganteAsesino
6 Replies

7. Programming

Please help:program hang stuck there signal handling on POSIX Message Queue UNIX C programming

in a single main() function,so need signal handling. Use Posix Message Queue IPC mechanism , can ignore the priority and other linked list message,to implement the scenario: client:Knock Knock server:who's there client: Eric Server:Eric,Welcome. client:exit all process terminated ... (1 Reply)
Discussion started by: ouou
1 Replies

8. UNIX for Dummies Questions & Answers

handling signals without race conditions

Greetings, I am writing a small program in C on UNIX, in which I am using (POSIX reliable) signals. 1. Suppose I have a signal : SIGX, and the corresponding signal handler : sigx_handler. It is possible to receive SIGX in my process, and, while executing sigx_handler, to receive again... (0 Replies)
Discussion started by: aigoia
0 Replies

9. AIX

How to create core through program at the time of crash by handling signals?

I am in process of writing a library which can make any application of my product capable of creating core in the application's log folder with a product friendly core file name programatically. In my library I am registering for certain signals e.g. SIGILL, SIGFPE, SIGBUS, SIGSEGV, SIGSYS, SIGABRT... (1 Reply)
Discussion started by: rajeev_ks
1 Replies

10. UNIX for Advanced & Expert Users

Handling Signals in System Calls

What will happen if signal comes while a system call is being executed? How it will be handled? (1 Reply)
Discussion started by: rupeshkp728
1 Replies
GCORE(1)						      General Commands Manual							  GCORE(1)

NAME
gcore - get core image of running process SYNOPSIS
gcore [-s][-c core] pid DESCRIPTION
gcore creates a core image of each specified process, suitable for use with adb(1). By default the core image is written to the file <pid>.core. The options are: -c Write the core file to the specified file instead of <pid>.core. -s Stop the process while creating the core image and resume it when done. This makes sure that the core dump will be in a consistent state. The process is resumed even if it was already stopped. Of course, you can obtain the same result by manually stopping the process with kill(1). The core image name was changed from core.<pid> to <pid>.core to prevent matching names like core.h and core.c when using programs such as find(1). FILES
<process-id>.core The core image. BUGS
If gcore encounters an error while creating the core image and the -s option was used the process will remain stopped. Swapped out processes and system processes (the swapper) may not be gcore'd. 4.2 Berkeley Distribution April 15, 1994 GCORE(1)
All times are GMT -4. The time now is 08:09 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy