Questions tagged [gdb]
The GNU Debugger usually called just GDB
91
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How to read GDB's backtrace?
I am trying to understand GDB better. One question I wanted to start with is how to read a backtrace generated by GDB.
An example of a backtrace I am working on:
(gdb) bt
#0 ...
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2
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0
answers
32
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Ubuntu 24.04 gdb ".gnu_debugaltlink" missing file messages
Ubuntu 24.04, gdb 15.0.50.20240403-0ubuntu1, gcc Ubuntu 13.2.0-23ubuntu4, all installed via apt from repo.
When I go into gdb (command-line or from my IDE) and run I get a whole bunch (20?) of
could ...
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0
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332
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Does Ubuntu not provide debuginfod for gdb?
The operating system I am currently using is Ubuntu 22.04 (Jammy Jellyfish).
I referred to Ubuntu's Service - Debuginfod official documentation,
link: https://ubuntu.com/server/docs/service-debuginfod
...
- 141
1
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0
answers
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gdb Installation Error -- libc6-dev
UPDATE: I have re-installed (3 times) Ubuntu, and performed sudo apt policy libc6 libc6-dev with this output:
libc6:
Installed: 2.35-0ubuntu3.1
Candidate: 2.35-0ubuntu3.1
Version table:
*** 2....
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1
vote
1
answer
121
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Has the apache2-dbg package been dropped from Ubuntu 22.04?
Has the apache2-dbg package been dropped from Ubuntu 22.04? If so, is there any replacement?
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0
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67
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GDB in DDD produces a return character when I attempt to lookup value of variable
I've been trying to look up a value using gdb in ddd, in a .asm file as I am programming x86 assembly but when I type (into gdb) x/uw &min in the gdb shell, I just get a return character that ...
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0
votes
1
answer
4k
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22.04 gnome-control-center GLib segmentation fault
Since updating to 22.04, the settings menu segfaults every time I try to start it. I see some other threads with this issue - one who stopped using ubuntu as a solution, and the other answers did not ...
- 133
9
votes
1
answer
2k
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How to update glibc on ubuntu 20.04 due to security vulnerability
I am trying to update glibc 2.31-0ubuntu9.2. As an internal scan has picked this up as vulnerable.
https://nvd.nist.gov/vuln/detail/CVE-2021-33574#range-6777140
When I use sudo apt-get update then ...
- 91
3
votes
3
answers
656
views
Mouse click not working while debugging with GDB
I'm trying to debug a windowed application with GDB in Ubuntu.
First I set a breakpoint in the code.
Then, while running the windowed application, the program stops at the breakpoint at some time.
...
- 207
-1
votes
1
answer
2k
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How to fix the X Window System error coming when running a c++ GTK program
I am getting an error while running a program written in c++ in GTK. The program stops when this error appear. I am a beginner and i have no idea what to do for this. The error is as follows.
(main:...
1
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0
answers
1k
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GDBus.Error:org.freedesktop.PolicyKit1Error.Failed: Unix process subject does not have uid set. Virtualbox
Hello ubuntu Community,
i have a Problem to open the root Folder or an application.
I use Ubunutu with the Virtualbox. I would be happy if someone could help me.Error
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0
answers
672
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gdb/gdb multiarch does not work on my ubuntu
currently I'm running xv6 on qemu on Ubuntu machine, the version is buster/sid
On one terminal I start qemu like this, seems ok
~/xv6-labs-2020# make qemu-gdb
*** Now run 'gdb' in another window.
qemu-...
- 1
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0
answers
390
views
Qt5 installer does not find debugger
I installed Qt5.15.2 with the online community-version installer on Ubuntu 20.04. In QtCreator I find the compilers but not the debugger. On my system I also have GDB:
$apt policy gdb
gdb:
Installed:...
- 557
0
votes
1
answer
280
views
How does a newer version of a package disappear from apt-get install?
I have two Ubuntu 18.04 servers at my office that are for development work, and we have the GNU Debugger installed. All of these packages are always installed using the "sudo apt install" ...
- 431
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votes
1
answer
86
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Is "Ubuntu Desktop for Developers" different from "Ubuntu Desktop"?
Is "Ubuntu Desktop for Developers" different from "Ubuntu Desktop"? If so, how do I download the Developers' version. I want to make sure that I get things like gcc, g++, gdb, ...
- 177
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0
answers
296
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Two different core files generated at different occasions of application crash
I wanted my C++ application to produce core dumps when it crashed, so I followed this advice:
https://stackoverflow.com/questions/2065912/core-dumped-but-core-file-is-not-in-the-current-directory
...
- 461
0
votes
0
answers
568
views
Prompt is marching across the screen when entering gdb TUI
I'm debugging a program:
// t.c
#include <assert.h>
int main() {
assert(0);
return 0;
}
gcc t.c -g
gdb ./a.out
(gdb) r
Starting program: /home/user/a.out
a.out: t.c:4: main: Assertion ...
- 133
0
votes
1
answer
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what is the difference between gdb and gdb-peda?
I have tried to search on google but still could not find anything that i understand.
Can anyone tell me the difference between them?
And which one is better to debug c++?
- 495
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0
answers
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.coredumpctl pid weird alignment
While starting my first use of coredumpctl, I have noticed a repeated occurrence of a bug. I have created a small snippet which contains a stack BOF vulnerability (compiled with no stack protection). ...
- 131
0
votes
0
answers
377
views
gdb on Ubuntu 19.10 showing wrong variable values
Since upgrading to Ubuntu 19.10, gdb (8.3) is nearly unusable using programs compiled using the default gcc (9.2.1) using -O0 -ggdb -g3 because most displayed values for variables are wrong.
The ...
- 101
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1
answer
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Ubuntu 19.10 gdb nearly unusable long delay
I am having a problem with the gnu debugger on Ubuntu 19.10. The problem presents itself as a long delay, somewhere between 20-30 seconds between running my program with gdb and my program actually ...
- 261
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0
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gdb error for keepassx/keepassxc: "Cannot find user-level thread for LWP" "generic error"
I tried to run gdb on keepassxc, but encountered an unfamiliar error:
$ gdb /usr/bin/keepassxc
GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git
Copyright (C) 2018 Free Software Foundation, Inc.
...
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0
votes
1
answer
107
views
Is there an Ubuntu developer installation which comes with full C/C++ development envirenment installed?
I do not want to download source code for gnu gcc/g++/gdb/make... and compile from scratch. I am OK with downloading a built and ready to use set of packages. But best of all, I am looking for an ...
3
votes
0
answers
356
views
Manually compile and install debugging symbols for the recoll package?
I've got some crash files for recoll
from which I would like to extract a symbolic stack trace.
Unfortunately,
there are no debug symbols
available for this package,
so my stack traces are mostly ...
- 1,548
1
vote
0
answers
4k
views
How to solve warnings from GDB?
I need help about debugging GIMP 2.10.10
O.S. Ubuntu 18.04.2 LTS
GDB Version (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git
I get this message from GDB when i try to generate a backtrace inside flatpak ...
0
votes
1
answer
1k
views
TrueStudio "Could not determine GDB version command" error
I am working with TrueStudio. I face with this error when click Debug button. https://i.sstatic.net/AhN6q.jpg How can I fix this problem? Before this in the build step I saw another warning as you ...
- 31
4
votes
2
answers
12k
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Core file not generated in Ubuntu 18.04
I was trying to generate a core file in Ubuntu 18.04. My program generates a core file, but I'm not able to find it.
$ ./a.out
Segmentation fault (core dumped)
$ ls -lrt
total 32
-rwxrwxrwx 1 sanjay ...
- 41
1
vote
2
answers
7k
views
g++ and gdb problem: debug symbols for shared libraries not found
I am porting a large set of applications and libraries from Debian 7 to Ubuntu 16.04. This is a GNU autotools project, so libtool is involved. gdb cannot find the symbols for the majority of the ...
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1
vote
1
answer
2k
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netbeans missing native build tools
My Goal
I want to have a fully functioning NetBeans C/C++ on my ubuntu 18.04
A small background
The first problem I've encountered was
build host not connected
after a little research I've ...
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2
votes
0
answers
1k
views
Upgrade to python 2.7.15 (for gdb 8) on Ubuntu 16.04
I am running Ubuntu 16.04 with gdb version 7.11.1-0ubuntu1~16.5. When I upgraded g++ to g++-6.4 (Ubuntu 6.4.0-17ubuntu1~16.04), gdb started giving python errors like:
Python Exception <class '...
- 1,083
4
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0
answers
1k
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How to set up debugger for ARM Assembly using qemu and gdb
I followed this tutorial as well as this one to set up a compiler + debugger for ARM Assembly.
Following the first one, I ran the command qemu-arm -singlestep -g 1234 emptyand started a new shell, ...
- 141
24
votes
7
answers
76k
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How can I install "gdb-arm-none-eabi" on Ubuntu 18.04 (Bionic Beaver)?
In previous versions of Ubuntu, GDB for ARM Cortex processors was part of the package gdb-arm-none-eabi. Searching https://packages.ubuntu.com/ for gdb-arm-none-eabi for Ubuntu 18.04 doesn't return ...
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votes
1
answer
3k
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False "application not responding" box is creating havoc with GDB
I'm trying to debug a C++ application using GDB and the Qt Creator IDE. Every time the debugger stops on a breakpoint, Ubuntu (v 17.10) thinks the application is frozen and issues the dialog box with ...
- 311
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0
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930
views
GDB not available after "make install" unless a new terminal is opened
I'm fairly new to Ubuntu and development on Linux in general. After building GDB from source (pre-installed the dependencies):
$ git clone git://sourceware.org/git/binutils-gdb.git
$ CD binutils-gdb
$...
- 9
3
votes
3
answers
9k
views
debugging in codelite - "GDB: Failed to set controlling terminal: Operation not permitted"
while debugging in codelite this error appears in the terminal :
could anyone help me solving this problem?
0
votes
0
answers
4k
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gdb during startup program exited with code 127
I am using Ubuntu 17.04, I am having problem with gdb. I am using CLion and Netbeans for C++ programming, when I debug code, it's throwing me this error During startup program exited with code 127. I ...
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votes
3
answers
3k
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Cannot install GDB on Ubuntu 17.10 due to Python dependency issues
I had to uninstall GDB just to upgrade to 17.10, but now I can't get it installed again.
sudo apt install gdb
Reading package lists... Done
Building dependency tree
Reading state information......
- 1,486
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3
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gdb-qemu : can't put break point on kernel function ( kernel 4.10.0-35)
I am trying to debug the Ubuntu kernel using KDB + qemu. However, I am not able to debug it. Following is the error I am getting. Can someone help?
Starting QEMU:
sudo qemu-system-x86_64 -enable-...
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-1
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1
answer
359
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Debian 4.9.3 - downgrading gdb, which version i need? [closed]
I can't work with Eclipse's debug stepping due to gdb version 7.12 not supporting certain option:
Failed to execute MI command:
maintenance set python print-stack off
Error message from debugger back ...
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1
vote
1
answer
2k
views
GDB can't break strcpy()? [closed]
so im trying to debug this simple c program
#include<stdio.h>
#include<string.h>
int main(){
char str_a[20];
strcpy(str_a,"Hello, world!\n");
printf(str_a);
return 0;}
gcc -...
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6
votes
1
answer
631
views
What would cause an installed application to not be recognized as such?
I need to revert my version of gdb back to a previous release so that it is compatible with a certain tool. I currently have gdb 7.7.1 installed. If I enter gdb into the terminal and hit enter, gdb ...
- 205
2
votes
1
answer
1k
views
gdb skips breakpoints without sudo
I'm trying to debug simple 8-line program with gdb:
$ g++ -g 1.cpp
$ gdb a.out
(gdb) break 5
Breakpoint 1 at 0x40089e: file 1.cpp, line 5.
(gdb) run
However, gdb will just skip over the breakpoint ...
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1
answer
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Gdb pretty printer is not working in Ubuntu 16.04
I have debugged C++ codes using gdb in Ubuntu 14.04. When I pass a stl container to the print command, it used to print the contents of the container. But then I upgraded to Ubuntu 16.04 LTS a week ...
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2
votes
2
answers
6k
views
How to output web page html source code into a file
My goal is to output an html source into a file, I'm using w3m to browse the web from terminal.
When using the following command on terminal: w3m <url> -dump the program displays the web site ...
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1
vote
1
answer
6k
views
Is ctype.h installed in my system?
I am running 16.04. My C program uses isdigit(int). I get the following when I run it under gdb:
`Breakpoint 1, check_tok (token=0x6f7c20 <tokens> ".t") at outline.c:150
150 unsigned char *tp=...
2
votes
1
answer
6k
views
When I run the debugger: "failed to set controlling terminal" [duplicate]
In a book I read, the author's CPU was 32-bit. Mine is 64-bit. I run the NASM assembler in the terminal with:
nasm -f elf -g -F stabs asmwork/eatsyscall.asm
Then I run the linker:
ld -o eatsyscall ...
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1
vote
0
answers
276
views
Port Ubuntu Touch using Windows 10 ubuntu bash
I'm trying to port Ubuntu Touch to my phone using Windows 10 bash. After many try, i stuck on building the test image for Nexus 4 to check possible it's or not. And every time after starting building:
...
3
votes
2
answers
4k
views
Putting some lines in a script to execute them in gdb
I want to create a script or actually a shortcut to surf in peace
#!/bin/bash
konsole -e firefox --debug
(gdb) handle SIGPIPE noprint nostop pass
(gdb) handle SIGSEGV noprint nostop pass
(gdb) run
...
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0
votes
2
answers
1k
views
gdb - load kernel module for remote debugging
Ubuntu 14.04 LTS:
peter@peterubuntu0:$ insmod mymodule
peter@peterubuntu0:/sys/module/mymodule/sections$ cat .text .data .bss
0x0000000000000000
0x0000000000000000
0x0000000000000000
So how do I ...
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votes
1
answer
2k
views
GDB arrow keys not working
The up arrow key in gdb is not scrolling through previous commands on one of my ubuntu machines (kudu) but is working on another (similar) machine (cs13):
karl@kudu:~$ gdb --version
GNU gdb (Ubuntu 7....
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