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-1
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0answers
10 views

gdb710 crashs on start [on hold]

Since I need to debug my binary, I installed GDB on my FreeBSD server. I now have the problem that if I want to start gdb I get an error I don't know anything about. i386fbsd-kern.c:482: ...
0
votes
0answers
9 views

Unable to jump using GDB [migrated]

I'm generally successful using GDB to debug some code - although this is the first project I've ever actually use it in anger - but one particular executable is causing me problems. It's spawned as a ...
0
votes
1answer
15 views

GDB - Call second program

I have a program which I want to debug gdb. And I want to call a second program to redirect the output to the first program. How this is done in gdb. I tried it like that: run -2 < $(python ...
1
vote
0answers
68 views

Linux Kernel module Remote Debugging with GDB + KGDB, Remote 'g' packet reply is too long

I am trying to remotely debug Linux Kernel and I am having issues. My setup: Target machine with Ubnutu Linux with my custom kernel 4.3 which I built with debugging information and KGDB. ...
2
votes
1answer
41 views

GDB throws error on Arch Linux

When I try stepping through a program, gdb throws this error std::ostream::operator<< (this=0x6013c0 <std::cout@@GLIBCXX_3.4>, __n=2) at ...
3
votes
1answer
60 views

GDB hangs forever on Solaris

GDB seems to hang everytime when I try run command from gdb prompt. When I ran ps, there are two gdb processes that have been spawned and pstack reveals the following - ...
0
votes
2answers
130 views

gdb installation in beaglebone black with customized linux kernel

I am developing an application for the beaglebone black which I cross compile using arm gcc compiler then port on the compiled binary file to the beaglebone black using scp command and run there on ...
0
votes
0answers
33 views

dlopen causes segfault when running in gdb

My project loads a libray (compiled in debug mode) dynamically within the main thread with dlopen and then uses dlsym without problem. However, when running in debug mode with gdb 7.7.1+dfsg-5, it ...
0
votes
0answers
121 views

Can't install additional debug infos in the CentOS 6.7

I am attempting to debug coredump of the some application on the latest CentOS 6.7 and gdb gives me hints that some debug infos are missing, for example: Missing separate debuginfo for ...
0
votes
0answers
74 views

gdb attach question

When using gdb to attach to the process. It shows that Could not attach to process. If your uid matches the uid of the target process, check the setting of /proc/sys/kernel/yama/ptrace_scope, ...
0
votes
0answers
20 views

Setting breakpoints remotely with gdb/gdbserver

I'm debugging a vulnerable app on a remote host. I've set up gbserver on the host with: gdbserver host:1234 /my/target/app On my local host I've connected with: $ gdb /same/target/app gdb$ target ...
0
votes
1answer
96 views

gdb displays not all variables in KDevelop [closed]

Hoping, the image describes the issue much better than I can do. Generally, I'm debugging a multithreaded application in KDevelop with gdb. I'm debugging the app step by step (F11 shortcut) and have ...
2
votes
1answer
20 views

gdb: stop the program when the variable changes

So I was wondering how to stop gdb every time my variable (test_v) changes I know watch test_v Do I do watch test_v stop To stop the program every time the variable test_v changes?
0
votes
0answers
45 views

In gdb i can print a struct but not display it

When i display a struct gdb returns nothing but if i print the same thing it returns values nicely. Is there a way to have gdb display what it can print or are there restrictions about structures? ...
1
vote
1answer
305 views

How to set up gdb to scan through heap memory?

I want to print out and analyze the contents of the system heap. Obviously, this should be a privileged operation, and might go against the grain of what GDB was intended to do. Specifically, I want ...
0
votes
0answers
131 views

Do I have support for python in gdb or not?

I've been following this tutorial which requires running gdb with python support but I get following message: ┌─[wakatana@~] [63 files, 178Mb] └──> gdb --python gdb: unrecognized option '--python' ...
1
vote
2answers
2k views

How to compile without optimizations -O0 using CMake?

I am using scientific linux. I am trying to compile a project that uses a bunch of cpp files. In the directory user/project/Build, I enter make to compile and link all the cpp files. I then have to ...
0
votes
1answer
939 views

gdb always program exited with code 01

I am using scientific linux. I am trying to compile a project that uses a bunch of cpp files. Right now, it compiles successfully, but the values/data I'm getting are definitely wrong. In the ...
2
votes
1answer
500 views

The structure of /proc/kcore on 64-bit machine and relation to physical memory

Let me preface this question by saying that I've found a lot of answers for questions similar to my question but for 32-bit machines. However, I can't find anything for 64-bit machines. Please no ...
1
vote
1answer
85 views

How do I get linux-gate.dso on a newer linux system?

I would like to find out which method my 32bit QEMU guest is using for system calls. There's an excellent article explaining linux-gate.dso (http://www.trilithium.com/johan/2005/08/linux-gate/). ...
2
votes
1answer
1k views

GDB cannot exec my test program

My computer run with Ubuntu 14.04. GDB seems to be abnormal in different account. For example I make a very simple test. I write a file under ~/test/test.c like this: #include <stdio.h> ...
0
votes
1answer
54 views

Obtaining a code dump from a binary

Sorry about my newbie question but is it possible to dump the assembly language code of a binary using GDB? I tried to use the "l" command but it says No symbol table is loaded. Use the "file" ...
1
vote
1answer
254 views

GDB up arrow doesn't work

I searched a lot about similar problems but found nothing. When running gdb I couldn't use up arrow for walking through previous commands. Up and down arrows are just ignored. I have started to ...
2
votes
2answers
486 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
65 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 ...
5
votes
1answer
827 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 ...
5
votes
1answer
303 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?
4
votes
1answer
227 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 ...
1
vote
1answer
3k 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 ...
7
votes
2answers
578 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
1k 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
332 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
306 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 ...
5
votes
1answer
401 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. ...
1
vote
1answer
815 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
1k 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
3k 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
487 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
944 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 ...
5
votes
5answers
593 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
423 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
350 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
136 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
120 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
2answers
440 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
69 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
28 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
93 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
63 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
381 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 ...