Software :: Get A Simple Hex Dump In Gdb
Apr 30, 2010
While using gdb to debug a C++ program. What I'd like is to be able to enter an address (or an expression yielding an address), and a size, and have it simply do a hex dump. Or maybe even like:
aaaaaaaa 7473839298 29873479898734 this du mp is fa
aaaaaaab 8298...... .............. ke
(I just made up the hex digits above, and didn't even count columns. But you get the idea)
I'm actually using DDD, so a GUI solution is also acceptable.
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Sep 6, 2010
I have used Dump Command to dump the application files. For Full backup the level 0 is working fine. For incremental backup I used the level 1 or 2 it is getting the error as
DUMP: Only level 0 dumps are allowed on a subdirectory
DUMP: The ENTIRE dump is aborted.
The code I used
===============================
#!/bin/bash
#Full Day Backup Script
#application folders backup
#test is the username
now=$(date +"%d-%m-%Y")
[Code]...
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Oct 7, 2009
I want to generate core dump files from my program when it crashes. Its a pretty big process and has about 10-11 threads in it.I have followed the documentation to enable core dump by setting ulimit to unlimited etc. I quickly tried "A demo program creating a core dump" from the following webpage, which succeeds in Segfault and dumping a core file in the directory that I configured.However, I tried running my original program and caused it to crash. I did this by making calls to kill(), raise() or the same null pointer access as shown in the webpage above. In each case, my program crashed but did not generate a core dump file. Am I missing something?My program is in C++ and my environment is Redhat 9.0 (kernel 2.4.20)
Going through the "Why do I NOT get a core dump?" section on the same webpage as above, I can see two potential problems. One - there are issues with the suid/sgid (bullet # 6). I am not able to change any settings with suid because my system does not contain either /proc/sys/fs/suid_dumpable or /proc/sys/kernel/suid_dumpableTwo, my program has threads in it and the bullet # 8 is the problem.
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Oct 7, 2010
i'm a college student studying pc programing, and i was given today a special work and i have to program using miranda... which i've never used it >.< can anyone give me a hand to where to download, how to compile, and a simple tutorial for making a simple program or something?
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Jan 18, 2011
Recently I tried to get BGP table dumps from public route servers. I telnetted into one of those public route servers and ran "show ip bgp" command. My question is: how to save the command output to my local machine? I cannot run "show ip bgp > tmp.txt" on the remote route server.
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Apr 21, 2010
is there a way to get GDB to dump memory map so I can see if certain parts of the memory is executable or not (i.e : if heap/stack is executable). Do you know of a way to do this within GDB session?
Just didn't use gdb, and did instead:
cat /proc/$PID/maps
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Jul 17, 2009
i've got a non-typical problem here. i've got kvm-ed freebsd (its not so important here) stored on a block device - /dev/sdb8. i wanted to install fedora rawhide there but first i thought it's a good idea to do some backup. so here we go dd if=/dev/sdb8 of=freebsd.img bs=4k
theoretically, dd should do the thing without saying a word, but it doesn't. every time it stops after reaching 16GB filesize (partition is about 35GB) and completely locks the system (only reset helps).the dump worked only once, but when i tried to compress this big image 7z got stucked too and the system froze . the problem occurs when copying to the same drive or to different drive. i've got a partial kerneloops logs, but so far i haven't found the answer.
Code:
Kernel failure message 1:
BUG: Bad page state in process bash pfn:14a224
page:ffffe200048377e0 flags:0040000000000000 count:0 mapcount:0 mapping:0000000000000002 index:2a4b (Tainted: P )
Pid: 9711, comm: bash Tainted: P 2.6.29.5-191.fc11.x86_64 #1
Call Trace:
[<ffffffff810a2be0>] bad_page+0x11d/0x130
[Code]....
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Feb 18, 2010
I got a backup file which first 1000 bytes are as follows:
Code:
00000000 54 41 50 45 00 00 03 00 8c 00 0e 01 00 00 00 00 |TAPE............|
00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00000030 02 00 87 05 51 64 50 48 01 00 00 00 01 00 00 00 |....QdPH........|
[code]....
I tried to restore it:
Code:
$ restore -r -f zzz_labxxxx
Checksum error 32615101403, inode 0 file (null)
restore: Tape is not a dump tape
What application could I use or even try? The man who made the backup can't be reached anymore and we had been left with the backup.
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May 27, 2010
To get core dump from my program, I execute the following commands from the terminal:
ulimit -c unlimited
myprogram
After program crash, I see core file in the home directory. How can I make this mode persistent, to have code dump always?
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Dec 7, 2010
I am trying to create a dump log using tcpdump. I want display the top 10 ip addresses sorted numerically showing how many times the ips are hitting the server. I'm getting frustrated because It's not working how I'd like it to.
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Feb 2, 2011
I've been using Linux for about 8 years now, including Red Hat, Debian, Fedora, Mandrake (now Mandriva), Libranet (R.I.P.), and an aborted foray into Gentoo (not my cup of tea). A few years ago, I switched to Ubuntu, and now I use it everywhere. It runs my Mythtv dvr at home, powers my laptop, and my desktop at work. I'm now considering with some reluctance to return to Debian. I like the basic principles of Debian, and now don't feel I need the latest and greatest packages. However, Ubuntu has generally "just worked" in a desktop setting. Anyone with Ubuntu experience tried Squeeze as a desktop OS yet? How does it compare to Ubuntu?
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Sep 7, 2010
I am still new in linux (Redhat) i used dump command to backup the root of the linux server: #dump -0u -f /dev/st0 / the command is achieved. how to restore this dump.
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Apr 28, 2009
How do I get a full kernel dump?
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Sep 6, 2010
I setup kdump on sles11sp1, on issuing "echo c > /proc/sysrq-trigger" capture kernel is not booted and kernel dump is not created. Here is my system configuration: Welcome to SUSE Linux Enterprise Server 11 SP1 (x86_64) - Kernel
(l). blade797:~ # uname -a Linux blade797 2.6.32.12-0.7-default #1 SMP 2010-05-20 11:14:20 +0200 x86_64 x86_64 x86_64 GNU/Linux
blade797:~ # cat /proc/cmdline root=/dev/disk/by-id/cciss-3600508b1001030343220202020200018-part2 resume=/dev/disk/by-id/cciss-3600508b1001030343220202020200018-part1 splash=silent crashkernel=256M-:128M vga=0x317 steps followed to enable kdump:
1) yast2 kdump
2) chkconfig boot.kdump on
3) reboot
4) cat /sys/kernel/kexec_crash_loaded
1
5) echo c > /proc/sysrq-trigger
6) system panicked, but dump is not captured.
7) I'm missing /proc/vmcore on Sless11Sp1.
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Jul 4, 2011
I have a webcam that periodically gets dumped and I have to unplug and plug back in to get it to work again. I think it has to do with somethign about how the webcam is USB 2.0 but my PC is USB 1.0, even though it says it is USB 2.0. In Windows it would also dump it but then it would automatically remount it.
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Jul 27, 2011
In my program, I fork() to get a child process. Because of some problem, child process terminates by a segmentation fault. Parent process is still running. I have compiled my code with -g option. I have done: ulimit -c unlimited. I am not getting core dump of the child process. How can I get the core dump of child process?
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Oct 21, 2009
How to create a dump of an existing file and how to restore it with command line?
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Feb 8, 2010
I have a Red Hat Enterprise (AS) 4.8 system and I need to know how to totally rebuild the system from dump tape. I have been making some full level 0 dumps of the system to the attached DAT72 tape drive... In the case the boot disk goes south, I need to reload from tape, onto a new disk drive. I know how to do this in Solaris. I assume you boot from CD to like a mini-root, then configure and mount the drive on temp mount points, restore the sys data, then load the "boot blocks" (like installboot on solaris).
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Dec 10, 2010
how to collect the memory Dump In Linux?
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Mar 27, 2011
I would like to have dump backup just my home directory but am having problems the command I am using wants to back every thing and takes hours upon hours it has been running for about 10 hr and only 21% is done. This is the command dump -0u -f dp_hd /media/CENTON USB/ /how can I get this to back up only my home directory
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Jun 5, 2009
I need to discover more detail error kernel panic in my linux box, some body know any way do dump in kernel Linux?
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Jan 11, 2011
My application team is asking me to generate the kernel-dump.
Here are details about my server.
OS: RHEL 4.7/32 Bit
Kernel Version: 2.6.9-89.0.23.ELsmp
Processor: Intel(R) Xeon(R) CPU E5520@ 2.27GHz
Hardware: HP Proliant 380G6 series server.
I am using Electric Cloud applications. Sometimes it creates some kernel panic and immediately got rebooted. Kernel-debuginfo rpm is not installed. In some thread, I read the kernel-debuginfo rpm's version should match with the kernel version. In my case I couldn't even find the exact version of kernel-debuginfo version.
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May 19, 2009
Using tar is it possible to backup different types of file system e.g.ext3, ufs, or any other file system. I know using dump it is not possible because it is reading through raw device. Then what about tar? Where I get more info about this? Means suppose I want to backup files from different file systems using tar then is it possible?
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May 13, 2010
We are going through the motions of testing the backup and restore configurations of our postgres database. One idea was testing the viability of the dump file. Does anyone know of a way of testing the dump file to determine if there is any corruption in it
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Oct 22, 2010
I modified the following files according to all I found after googling the net:
/etc/security/limits.conf
* soft core unlimited
/etc/profile
ulimit -c unlimited[code]....
I don't get a core file when I kill -11 <pid_of_sleep>
System is centos 5.3
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Dec 7, 2010
I'm posting because I've read everything I can find on google and in the forum and the man page and still can't get it to work. I did read the FAQ, I hope I have adhered to it.I've tried several things and I don't remember exactly everything I tried and in what order.I've got several (12) HP ProLiant DL140 G3 servers running CentOS 5 that lockup about once a week. These are in a remote colo cage so I all i have access to is the built-in HP lights-out management interface, which includes a console, and ssh. I've been trying to get kdump setup to try to figure out what's going on. As an aside, if I run top on the console (via the management interface) the servers stay up for about a week, if I don't run top they crash within about 48 hours.I've used yum update to update to the latest available kernel (2.6.18-194.26.1.el5.x86_64) and installed the debuginfo and debuginfo-common RPMs from http://debuginfo.centos.org/5/x86_64/I have a single command in the /etc/kdump.conf file:ext3 /dev/sda5
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Jul 1, 2011
Doing this: mplayer dvd://1 -v -dumpstream -dumpfile dump.vob Gives me all the audio tracks, but not the subtitles. How can I go about getting the subtitles to be included in the file dump.vob? I've tried something like: mplayer dvd://1 -v -sid 5 -dumpstream -dumpfile dump.vob (where -sid 5 was the correct subtitle) but this does not work. I'm going to use mencoder to make an .avi file (with subtiutles, obviously), so I could, as a last resort, use some other program that extracts the subtitles (suggestions?).
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Mar 8, 2010
I have set of DVD disks. I'd like to rip them to .mkv files, but with all information - i.e. all subtitles, and all audio tracks. Is there any tool on Linux that I could use to do it? I found some Gentoo howto about ripping, but it requires writing shell scripts, and I'd rather use something with clickable interface.
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Mar 17, 2010
I have a script (below) which works ok, but I have tried to modify it as I want to keep the older files for a restore if needed. I have tried adding a date suffix to the newly created files (second lump of code), but it doesn't seem to work.I get the error:
$SOURCEDIR/p1db_$DATEVAR.sql: ambiguous redirect
The working original script:
Code:
#!/bin/bash[code].....
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Nov 18, 2010
Let's say we have a file tables listing all the tables of a database.Can I use grep and mysqldump to dump only tables with certain prefix? I tried
grep prefix_ tables | mysqldump -u root -p databasename > db.sql
but this takes all the tables..
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