The gdb tag has no wiki summary.
2
votes
2answers
72 views
Using gdb to inspect environment variables
I have been trying to find the address of the SHELL environment variable in a program on a Ubuntu 12.04 machine. I have turned off ASLR.
I found similar posts : SO question and blog post
I have ...
2
votes
0answers
18 views
How can you annotate or club info into ELF core files on Linux?
For debugging core files it would be useful to add additional
information into a core file at the time it is generated.
I'm currently using /proc/sys/kernel/core_pattern to run a
'dumb' script that ...
4
votes
1answer
42 views
Can anything useful be done with a truncated core?
We have processes written in a mix of Python, Java and C++ that core dump from time to time. They allocate more memory in chunks as needed during runtime, and are known to crash when their allocation ...
3
votes
1answer
30 views
How to save the result of printf to a variable in GDB?
(gdb)printf "Hello %d", 7
Hello 7
(gdb)set $MyVar = printf "Hello %d", 7 // ???
How to save the result of printf "Hello %d", 7 to $MyVar?
3
votes
1answer
50 views
How to make gdb not ask me “y or n”?
When I use GDB command add-symbol-file to load the symbol, GDB always asks me 'y or n', like this:
gdb> add-symbol-file mydrv.ko 0xa0070000
add symbol table from file "mydrv.ko" at
...
0
votes
1answer
159 views
Missing separate debuginfos
I'm trying to debug a code using GDB in a Fedora machine. It produces this message each time I run it.
Missing separate debuginfos, use: debuginfo-install glibc-2.18-12.fc20.x86_64 ...
5
votes
2answers
257 views
How to determine what instructions a process is executing?
I know about strace and ltrace, but that only tells me what system calls and library calls a process is executing, respectively. I would like to know exactly what instructions a process is executing. ...
2
votes
1answer
87 views
“Missing separate debuginfo for …” when running gcore
I am running the following:
command: gcore 56058
output:
Missing separate debuginfo for /lib64/libdl.so.2
Try: zypper install -C "debuginfo(build-id)=dcca9c1f648bda0a7318a7c8844982c440e3e4a3"
...
0
votes
0answers
110 views
qtcreator debugger shows <unavailable synchronous data> when trying to view the contents of std::map
I'm running QtCreator 4.8.0 on a Ubuntu 12.04 (64bit) machine.
apt-cache policy qtcreator shows:
qtcreator:
Installed: 2.4.1-0ubuntu2
Candidate: 2.4.1-0ubuntu2
Version table:
*** ...
1
vote
0answers
52 views
How to debug a semop failure?
Using a 2.6.30-gentoo-r4 Linux a very complex system of php code is executed (with 4.4.9-pl0-gentoo and 5.2.10-pl0-gentoo), which occasionally runs into a semaphore blocking problem. The call to the ...
3
votes
1answer
108 views
Backtrace of “git clone” running inside qemu-user-emulation based arm-chroot
I'm running a wheezy:armhf chroot using qemu user emulation on my jessie:x86_64 system. Somehow, a git clone on a particular private repository will hang inside the chroot, while succeed natively. ...
0
votes
0answers
59 views
Can I use lldb to remotely debug the Linux kernel?
With GDB, I can remotely debug the Linux kernel. lldb, which promises to completely replace GDB, should be able to remotely debug the Linux kernel too. However, I cannot find any tutorial about this ...
0
votes
1answer
173 views
what are some of the best resources to learn advanced debugging techniques using gdb? [closed]
I know the basics of how to use gdb. But I would like to learn some advanced debugging techniques using gdb. What are the best resources - books, blogs, tutorials - that any of you use regularly. I ...
1
vote
2answers
351 views
Uninstalling GDB on a Mac
I'm having lots of problems with GDB; usually crashes and starts using 100% CPU until I kill the process using the activity monitor on the Mac (using Mavericks).
How do I remove GDB from my machine ...
3
votes
1answer
910 views
permission denied for ptrace under GDB
I initially posted this question on StackOverflow, as a GDB problem. I didn't find a solution there, but they did help me find that it's a permissions problem, so I'm posting it here.
I have set a ...
2
votes
1answer
240 views
How can I run gdb in one machine and run kgdb kernel in another machine?
I want to run two machine:
debugged machine: compiled kernel with kgdb option.
debugger machine: for running gdb
How can I debug machine 1 from machine 2?
0
votes
1answer
447 views
Error installing gdb-arm-linux-gnueabi
I get an error when I try to install the gdb-arm-linux-gnueabi package.
This is the error that I obtain when I run apt-get install gdb-arm-linux-gnueabi:
$ env LC_ALL=C sudo apt-get install ...
0
votes
0answers
153 views
gdb debugging in Terminal OS X (10.8.5) with zsh - zsh doesn't know gdb
For my studies I have to run a binary unix-program called bomb with gdb.
Some time ago I followed the steps on ...
4
votes
5answers
209 views
Run program at lower CPU speed?
It would be very useful for me to run specific programs in a Linux environment with a fixed (lower) CPU clock speed (say, runat 400mhz ./my-program --argument-of="my program" for getting that clock ...
0
votes
0answers
190 views
gdb-multiarch command not found
I have installed QEMU in RHEL for running the assembly programs in ARM. I have successfully installed QEMU and ARM. However, for debugging we are thinking to use GDB. I want to install the ...
2
votes
1answer
187 views
QEMU for ARM programs with GDB [closed]
I want to emulate an ARM processor for running the assembly programs using QEMU in RHEL. I have installed QEMU but I still have problems in running the assembly program. I got the assembly program, ...
2
votes
2answers
108 views
Tshark not running via gdb
I have successfully installed wireshark on centos 6.4 I can run the command tshark it works perfectly fine. I want to run gdb so that I want to learn how it decodes tcp and udp packet as I am writing ...
0
votes
0answers
57 views
Building GDB, cant find libreadline.a
I am trying to build GDB from source, and am encountering a strange problem. I'm not sure what information is relevant, so please let me know if I have not provided enough.
I am working on Linux ...
0
votes
1answer
111 views
gdb not launching app
I am trying to run a app using gdb in emulator shell. I use following command
gdb <path of exe>
However, The app does not launch and I get following error
Starting program: <path of ...
0
votes
1answer
65 views
Changing suspend order on OpenSUSE 12.2
This question seems more relevant here than SO. I've been trying to debug a library that X uses through a GDB session that I'm running through SSH, but it seems that on OpenSUSE, the SSH session is ...
0
votes
1answer
24 views
Auditing of gdb commands
Is there a way I can log all gdb commands executed by a user?
And do user level logging?
Is any other tool like gdbserver can help in this case ?
0
votes
2answers
59 views
Read only mode in gdb
Is there gdb read only mode ?
Is there way I can restrict gdb level to read only. So I will not be able to modify current data in gdb.
Can gdbserver or any other tool help in this case?
2
votes
0answers
54 views
kgdb not returning control to gdb
I've compiled a kernel with kgdb support and I'm trying to debug it. I have two machines running, a debug machine (running the kgdb kernel) and the machine I'm using to debug it. They are connected ...
1
vote
1answer
221 views
How to compile linux kernel and debug with gcc and BOCHS?
I have download bochs 2.6 sourcecode and installed with gdb-stub configuration. I would like to debug linux-kernel 1.0 or 2.0 or 3.0 which sourcecode downloaded from http://www.kernel.org/ with gcc ...
3
votes
2answers
2k views
Missing separate debuginfo for - GDB
I have mentioned -g option along with -Wall in the Makefile.
When I run gdb onlineSunday, I get:
Missing separate debuginfo for /usr/lib64/kde4/plugins/imageformats/kimg_dds.so
Try: zypper install ...
6
votes
2answers
4k views
How can I find a memory leak of a running process?
Is there a way, I can find the memory leak of a running process? I can use Valgrind for finding memory leaks before the start of a process. I can use GDB to attach it to a running process. How could I ...
1
vote
1answer
185 views
vimrc mapping line numbers
I have these lines in my .vimrc file:
:map <F9> :exe ':!gdbset bp "%:'.line(".").'"'<CR><CR>
:map <F8> :exe ':!gdbset clear bp "%:'.line(".").'"'<CR><CR>
They ...
7
votes
2answers
385 views
Unix History: return code octal?
// EDIT: Request to move this question to unix.stackexchange.com
I was thrown off guard today by gdb:
Program exited with code 0146.
gdb prints the return code in octal; looking into why I found:
...
4
votes
2answers
2k views
Can gdb debug suid root programs?
I wrote a program that calls setuid(0) and execve("/bin/bash",NULL,NULL).
Then I did chown root:root a.out && chmod +s a.out
When I execute ./a.out I get a root shell. However when I do gdb ...
5
votes
2answers
1k views
Dump process core without killing the process
Is there a way to get a core dump (or something similar) for a process without actually killing the processes? I have a multithreaded python process running on an embedded system. And I want to be ...
