Questions tagged [gdb]

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Qemu debug linux kernel, can not load modules

Recently, I'm trying to compile Linux kernel and use gdb to debug, I followed :debug kernel ;linux kernel debug; And I found my lx-symbols gdb cmd can not load other modules and symbols, its only ...
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Can I debug with python and GDB my microcontroller?

I would like to ask, if exist a library in python so I can write a tool to debug my controller with GDB and I could implement a way to read some addresses and draw a graphic or something similar?
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7 votes
3 answers
11k views

how to access windows localhost from wsl2?

I have windows 11 with wsl2(ubuntu) installed on it. I've setup a gdb listener server on my windows localhost and want to access it from wsl2. but it seems my windows machine and wsl vm are using ...
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2 votes
2 answers
686 views

GDB Hangs after “New Thread” on macOS

I have built GDB from source on macOS 12.0 and codesigned it. However, every time I try to debug a program, I get this: (gdb) b main Breakpoint 1 at 0x10000324f: file main.cpp, line 50. (gdb) run ...
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  • 221
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1 answer
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Installation failed for gdb in kali linux

$ sudo apt-get install gdb Reading package lists... Done Building dependency tree Reading state information... Done Package gdb is not available, but is referred to by another package. This may ...
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How do I dump the memory of running process in Windows?

I am learning how to use GDB. I want to dump the memory of a running process. I tried to like this gdb -pid 2767 (gdb) gcore test.dmp warning: cannot close "test.dmp": Invalid operation Can't create ...
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1 answer
330 views

libsymbolic.so: cannot open shared object file: No such file or directory

I am trying to debug my C++ application from the shell. gdb --args [scripts' parameters...] Then, in the gdb: (gdb) run and I get the output: error while loading shared libraries: libsymbolic.so: ...
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1 answer
297 views

GDB hangs when running 32bit executables

I have a VM with Mint Cinnamon 19.2 (this also happens in Ubuntu 18.04): whenever I run a 32 bit executable, whether i put breakpoints or not, I get these kind of warnings: warning: Breakpoint ...
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2 answers
4k views

gdb can't debug the 32bits program for linux

How to solve this? When I use the gdb to debug the 32bits program, this warning appeared. And this made the program can't run. This is the configuration information about gdb
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1 vote
0 answers
157 views

Prompt doesn't scroll/clear until window resizing (using gdb/cgdb in bash)

I'm just learning to write C, and I have been having this problem while using gdb/cgdb. It's really annoying, to the extent that it discourages me from using the debugger entirely. I'm using WSL for ...
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1 vote
0 answers
54 views

Install GDB remotely onto a Mac through SSH?

I've built the binaries for GDB on the Mac, but now I need to codesign it, and every tutorial tells me to open up the Keychain GUI to achieve this. I don't have any access to the actual computer, I ...
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2 votes
0 answers
228 views

GDB suspended every time after run program

I try to debug my program using gdb, but gdb suspended every time after run program. $ > gdb -q ./main Reading symbols from ./main... (gdb) disas main Dump of assembler code for function main: ...
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1 vote
0 answers
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GEF can't find python modules in virtualenv

I wanted to try out GEF but I am having some issues with missing commands. The tools says it's because of missing python packages, but I just installed them in a clean virtualenv to try. I am ...
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1 answer
159 views

gdb failed to load sharedlibrary

I had this problem when trying to decode a corefile generated by a system crash. But after I load the corefile and debug symbol of my main process, I found the gdb did not load any of sharedlibrary ...
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2 votes
1 answer
10k views

How to install GDB 8 in CentOS 7

I need to install GDB 8.0 or above in my CentOS 7. My current version of gdb is 7.6.1. I have followed the guide at devtoolset-7-gdb | Install HowTo: yum install centos-release-scl-rh yum --...
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172 views

Pointer address value truncated

I am facing core dump issue in my application code, application got dumped in frequent intervals(once in a month, not exactly). During the core analysis , i am able to identify that corrupted pointer ...
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8 votes
1 answer
6k views

How to codesign gdb on OS X Mojave?

After installing gdb from homebrew (via $ brew install gdb), I followed these instructions to give gdb permissions to attach to a process. When I got to the step that runs the command: $ codesign --...
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1 answer
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GDB cross-compilation for arm

I cross-compiling gdb on ubuntu 16.04 to debug an application running on arm. The main tutorial I'm following is https://sourceware.org/gdb/wiki/BuildingCrossGDBandGDBserver The cross-toolchain ...
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1 answer
788 views

Unix alias to redirect background process output

I'm looking for a way to redirect the output of a background process into /dev/null or some other file. $ python ./spam_console.py & $ [start doing something in the foreground $ cat test.py $ [...
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  • 111
0 votes
1 answer
396 views

STM32 Microcontroller with GDB: debugging doesn't work when I change flash structure

I want to debug my application for the STM32F107 microcontroller using JLinkGDBServer and the arm-none-eabi-gdb client. I am using the startup assembly file and the linker script provided by default ...
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1 answer
60 views

What format crash utility's disassembler uses to output assembly instructions?

Crash utility can disassemble kernel functions. but what format it uses? Which is first, source or destination? inst src, dist or inst dist, src This is what I am asking about: crash> dis ...
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  • 219
-1 votes
1 answer
2k views

What to install with Qt Creator?

I'm trying to install Qt creator on Windows but it has so many options (and the whole installation requires many GB) that I really don't know which ones I need. I only want to be able to create and ...
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  • 174
2 votes
1 answer
2k views

What is batch mode execution in GDB?

I read a comment like - "Runs gdb in batch mode". So wanted to understand what does batch mode execution mean for GDB? And what is the other mode of execution for GDB?
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1 vote
1 answer
661 views

what to do when vs-code remote C++ debugging asks to set gnutarget format-name

I am on to debugging remote C++ program running on raspberry pi on ubuntu. I have followed https://medium.com/@spe_/debugging-c-c-programs-remotely-using-visual-studio-code-and-gdbserver-559d3434fb78. ...
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  • 321
2 votes
1 answer
1k views

MinGW: Python enabled GDB on Windows

I use QtCreator 4.6.2, which apparently requires Python-enabled GDB if I want to use it as a debugger. I tried to install mingw32-gdb-python version 7.5-1 with MinGW installer (graphical interface), ...
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1 vote
1 answer
4k views

How do I uninstall pwndbg?

Not much explaining to do, except I Googled how to and couldn't find anything relating to the uninstall process. I am on a Debian 9 system. If I recall correctly I installed it using: git clone ...
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  • 138
6 votes
0 answers
690 views

GDB 7.6 TUI does not refresh the display, creating artifacts

I'm using GDB 7.6 on a remote server. When I start gdb, everything is fine, as long as the program to debug is not run. I can use up and down arrows to navigate through GDB history, etc. No display ...
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  • 169
0 votes
1 answer
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gdb binary and where to find it?

I'm following the instruction here to install gdb on my MacOS Sierra. In section "2.1.3. Code-sign the gdb binary", I'm supposed to "specify the full path to the gdb binary" but I don't know what it ...
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3 votes
1 answer
3k views

How to install specific gdb (or other) package version using apt-cyg in Cygwin?

I am trying to install fresh version of gdb debugger on my cygwin (version that comes with cygwin is buggy). Since I need the newest version of gdb, I need to use apt-cyg to install it. When I run ...
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  • 675
2 votes
2 answers
10k views

Cannot see variables in gdb

I'm new to cygwin (and *nix for that matter) and don't understand the following gdb behavior. I've created an executable that intentionally results in a SIGSEGV: #include <iostream> void Func(...
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1 answer
827 views

Arrow keys in GDB (window mode) not working with TERM=xterm

First, this is not the history size problem. (gdb) show history size The size of the command history is 70000000. Second, it happens in xterm and not in vt100 and I don't want vt100 because of weird ...
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2 votes
1 answer
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How to equivalent to ps -ef in Windows 10

I have looked online, and have not found anything that would accomplish what I want to do. I am looking for a command with output equivalent to "ps -ef" of Linux so I can find out the process id ...
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11 votes
2 answers
45k views

Closing open file without killing the process

I have java(yeah java...) application running on CentOS 7. After a while, there are many "deleted" files that bother me. for deleted files used(not the issue): lsof | grep "(deleted)" I found them ...
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2 votes
1 answer
339 views

coredumps 'can only dump core to fully qualified path!'

I have a question about generating a coredumps under Debian. First, I enable the feature trough this command : ulimit -c unlimited Next I create a Segmentation fault but I have this error : [...
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0 votes
1 answer
393 views

How to enter into process running on gdb?

So I was trying to debug a program that runs on two node. I use yod as task launcher. yod -hosts node01,node02 ./dist_task -nl 2 The program is stuck. So I wanted to use the gdb like this yod -...
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2 votes
1 answer
975 views

$HOME is not defined for root user on Ubuntu 14.04

On a fresh Ubuntu 14.04 install, the bash environment for the root user does not have $HOME defined. I need to run some apps from a root shell, for example: gdb /usr/sbin/apache2 This is difficult ...
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2 votes
0 answers
337 views

Emacs, gdb: How do direct program output to gdb buffer in gdb 2 window mode

Is there a way to tell Emacs 24.3.1 with gdb 7.5 to display the program output in the gdb buffer instead of a separate "** input/output **" buffer? (Displaying it in a separate buffer in 2 window ...
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1 vote
2 answers
4k views

Intalling gdb and pstack on Amazon Linux AMI

I tried installing gdb and pstack on EC2 Instance with Amazon Linux AMI (it was not installed by default), and it's not working. Tried: [ec2-user@ip-172-21-ab-xyz ~]$ sudo yum install gdb Loaded ...
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  • 111
0 votes
1 answer
1k views

Homebrew install gdb, symlink error with binutils

I'm trying to install GDB via Homebrew on OSX Mavericks via the command brew install homebrew/dupes/gdb. This error message pops up during install: gdb requires special privileges to access Mach ...
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2 votes
1 answer
328 views

Dtrace shows posix_spawn called with only 3 argument. Trying to launch by hand

I ran dtruss on a process that launches another one: the League of Legends Launcher starts the main game process with certain arguments that I can't seem to pass via the command line. What caught my ...
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6 votes
2 answers
6k views

Software: Launching League of Legends spectator mode from Command Line (Mac)

Background: tl;dr at the end League of Legends has a spectator mode, in which you can watch someone else's game (essentially a replay) with a 3 minute delay. Popular LoL website OP.GG has figured ...
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1 vote
0 answers
895 views

Debugging linux kernel, SIGKILL

Trying to debug linux kernel (vmlinux) with gdb during my education, but after I run kernel I just got "program terminated with SIGKILL": gdb vmlinux-3.11.0-12-generic ...GDB header... Reading ...
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0 votes
1 answer
11k views

How to install gdb on Arch Linux

How do I install the GNU Debugger (gdb) on Arch Linux? I've checked that I don't already have gdb installed by running this command: gdb -help I've tried this: sudo apt-get install gdb but it's ...
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1 vote
1 answer
2k views

Debug info package for centos

Hi I am getting the following on each line of gdb instruction steps. Does anyone know what package I need to install to remove this message from a CentOS build? Missing separate debuginfos, use: ...
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2 votes
0 answers
64 views

Old gdb cannot find out how to do logging

I'm running an obsolete Red Hat OS and debugging with the built-in gdb but I cannot figure out how to do logging. I've tried: set logging on But get: No symbol "logging" in current context It ...
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2 votes
0 answers
554 views

Where is the console ST2/GDB

I'm using sublime text 2. I got GDB to work but I don't see a console window anywhere. I see the GDB console but nothing that outputs text from my C++ program. How do I use GDB and see my the console ...
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2 votes
4 answers
52k views

How to know if gdb is installed?

How can i know if gdb is installed in a unix machine? I run the following commands: > gdb > gdb main and the result is gdb: command not found but i don't if this means that gdb is not ...
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  • 311
2 votes
1 answer
195 views

Can I remotely monitor printf results of a C program?

I have a long running C program in which I've started from the Terminal.app using: gdb program_name gdb run I'm using many printf statements to monitor the progress of the program. Unfortunately, ...
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0 votes
1 answer
1k views

Why gdb is bind to fixed version of autoconf?

Edit 1: I am trying to build gdb from source. Why can't I use autoconf 2.65 instead of 2.64? It is confusing:( /var/lib/gforge/chroot/home/users/mirror/ins/ins-autoconf/bin/autoreconf -iv ...
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  • 2,129
10 votes
4 answers
26k views

Why can't I find termcap library when I build gdb?

make and then failed with: configure: error: no termcap library found, but that termcap lib is just there, why can't make find it? checking for library containing zlibVersion... -lz checking zlib.h ...
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