12-05-2012
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 and in the handler routine of my signal I am forking gcore to create dump of the current process.
I am able to successfully create the core in this manner if any application which uses my library runs a faulty code e.g. Illegal Memory Access (Segmentation Violation) etc. However the core created in this manner does not take me to the faulty code location and displays the Signal Handler routine stack.
On windows this can be done through registering handler by calling SetUnhandledExceptionFilter. When OS calls the handler in case of any unhandled exception it also passes _EXCEPTION_POINTERS which is used for dump creation. The dump created in this manner contains the correct information of faulty code.
Through AIX signal handling I am only getting signal number in the handler routine. How can create correct core in the given situation on AIX programatically. Forking gcore is not working here as correct core is not getting generated. If any sample program is available then that would be great.
I am using AIX 6.1
10 More Discussions You Might Find Interesting
1. Programming
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
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
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
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
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
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
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
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. Solaris
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... (5 Replies)
Discussion started by: rajeev_ks
5 Replies
10. UNIX for Advanced & Expert Users
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) GNU Development Tools GCORE(1)
NAME
gcore - Generate a core file of a running program
SYNOPSIS
gcore [-o filename] pid
DESCRIPTION
Generate a core dump of a running program with process ID pid. Produced file is equivalent to a kernel produced core file as if the
process crashed (and if "ulimit -c" were used to set up an appropriate core dump limit). Unlike after a crash, after gcore the program
remains running without any change.
OPTIONS
-o filename
The optional argument filename specifies the file name where to put the core dump. If not specified, the file name defaults to
core.pid, where pid is the running program process ID.
SEE ALSO
The full documentation for GDB is maintained as a Texinfo manual. If the "info" and "gdb" programs and GDB's Texinfo documentation are
properly installed at your site, the command
info gdb
should give you access to the complete manual.
Using GDB: A Guide to the GNU Source-Level Debugger, Richard M. Stallman and Roland H. Pesch, July 1991.
COPYRIGHT
Copyright (c) 1988-2013 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with the Invariant Sections being "Free Software" and "Free Software Needs
Free Documentation", with the Front-Cover Texts being "A GNU Manual," and with the Back-Cover Texts as in (a) below.
(a) The FSF's Back-Cover Text is: "You are free to copy and modify this GNU Manual. Buying copies from GNU Press supports the FSF in
developing GNU and promoting software freedom."
gdb-Red Hat Enterprise Linux 7.6.1-51.el7 2014-06-10 GCORE(1)