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Join me and learn how to debug a program written in C using GDB. In this video, we go over how to compile a program written in C so that GDB can present it, as well as the basic commands used in GDB to debug a program. Like and subscribe for more videos like this! 🏫 COURSES 🏫 🤍y/courses/ 🔥 SOCIALS 🔥 Low Level Merch!: 🤍 Follow me on Twitter: 🤍 Follow me on Twitch: 🤍 Join me on Discord!: 🤍 Timestamps Intro 0:00 Compiling Code for GDB 0:20 Starting GDB 1:27 Breakpoints 2:05 C Step vs ASM Step 2:37 Step Over vs Step In 3:26 Finding the Bug 4:26 Outro 7:16
I had to upload this video even though it's already on tube cuz the actual up loader doesn't concern about description so it's hard to find in top rank. This is CS50 video on GDB . for more info visit cs50.tv
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Adding print statements to debug your crashing program is a tale as old as time. It gets the job done... most of the time. As your code gets more complex and larger, print debugging quickly becomes unfeasible. Using gdb and core files, you can easily cut your debugging time down. In this video, I'll be discussing a pet program that I wrote and using a core file to debug an issue with our program. We'll talk about how to get your program and kernel to produce a core file on segmentation fault, as well as a few techniques to debug C and C. 🏫 COURSES 🏫 🤍 🔥🔥🔥 SOCIALS 🔥🔥🔥 Low Level Merch!: 🤍 Follow me on Twitter: 🤍 Follow me on Twitch: 🤍 Join me on Discord!: 🤍
Patreon ➤ 🤍 Courses ➤ 🤍 Website ➤ 🤍 - Debug faster with gdb layouts (TUI) // If you ever get tired of typing list after every command in gdb, this is the video for you. Here, I describe the GDB Terminal User Interface (or TUI) which, many students don't realize is there. It allows you to see the C-source and assembly source while you step through your code, and the views are configurable through the layout command. Related Videos: GDB: 🤍 More GDB: 🤍 Even More GDB: 🤍 Curses: 🤍 * Welcome! I post videos that help you learn to program and become a more confident software developer. I cover beginner-to-advanced systems topics ranging from network programming, threads, processes, operating systems, embedded systems and others. My goal is to help you get under-the-hood and better understand how computers work and how you can use them to become stronger students and more capable professional developers. About me: I'm a computer scientist, electrical engineer, researcher, and teacher. I specialize in embedded systems, mobile computing, sensor networks, and the Internet of Things. I teach systems and networking courses at Clemson University, where I also lead the PERSIST research lab. More about me and what I do: 🤍 🤍 🤍 To Support the Channel: + like, subscribe, spread the word + contribute via Patreon - [🤍 Source code is also available to Patreon supporters. - [🤍
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Tutorial on the GNU Project Debugger given at the University of Waterloo on the 14th of June 2019 by Joshua Rampersad.
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We demonstrate how to use GDB to debug a C program. Files for this demonstration are available here: 🤍 0:00 GDB 0:15 Introduction 0:48 Getting started 1:21 GDB commands 1:35 Demonstration 2:32 Infinite loop 6:10 Infinite loop 2 10:10 Infinite loop 3 11:56 Incorrect sum 16:18 Invalid CLAs 19:10 Seg fault 21:09 Seg fault 2
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Соберем простую программу на C через cmake и запустим ее в gdb. Познакомимся с базовыми командами отладчика.
Hello YouTubers! This one has been in the pipeline for a while! IF this doesn't get YOU commenting away I don't know what will! LET ME KNOW YOUR THOUGHTS on the WORLDS FIRST! Thanks for watching! See you on the NEXT one ;) MR GDB over and OUT!
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What is the GNU GDB debugger? This video explains what is the GDB debugger and how to debug a C / C program inside the Linux terminal. A debugger is a program that allows you to pause and resume the execution of your code and makes it easier for programmers to find bugs in their code. We will execute the GDB tool step by step to explain the most popular commands to add breakpoints, watch variables, and pause/resume the execution of C and C code. GDB is a powerful debugger that allows us to work with C and C code from inside the operating system terminal. Mastering GDB will help you evolve as a programmer and open doors to optimize your code and find potential errors. We will work with a very basic C sample code, where one of the functions is returning the wrong value as a result. With GDB we can break the execution, watch the value of the variables, and continue to inspect our code line by line. For complete and comprehensive courses, including ones on the Linux operating system and other C and C development tools, visit: 🤍 SUBSCRIBE to learn more about computer science topics: 🤍 Follow me on Twitter: 🤍
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Musica de GDB Familia_Sonhos Artistas : Abelha Negra, Favela, Shoka Producão Beat : CiroFox Mixagem/Masterização : Machine_Filmes Filmagem/Iluminação : Machine_Filmes Musica para inspirar todos para todos os dias correr atraz dos seus sonhos e objetivos, tal como ex.(Mike Tyson e 2pac). Agradecimentos a JPTeam e a todos que se dedicarem a este video.
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I provide consultations regarding everything about hacking and reverse engineering! Book your timeslot: 🤍 GDB is THE debugger for reverse engineering Linux programs. But it can be quite hard to grasp. Also, GDB is better with plugins. In this tutorial, I'll show you GDB as well as PEDA basics for reverse engineering: starting program, breakpoints, modifying registers and memory, and printing memory contents. Happy hacking! 💰 By me a bier: 🤍 Table of Contents 0:00 Intro 0:42 Installing GDB and PEDA 1:12 Our Debugging Target 1:53 Loading a File in GDB 2:22 Breakpoints 3:21 Single-stepping 4:19 Modifying Registers 6:06 Modifying Memory 7:34 Examining Memory 8:38 Final Thoughts 9:24 Outtakes Subscribe to me on Twitter: 🤍 Lighting: 🤍 Thumbnail: 🤍
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Today, I will introduce GDB and how you can debug your C in Linux. GDB is a GNU Debugger and comes with the installation of gcc/g in operating systems such as Linux, MacOS, and Windows. For this tutorial, I will demonstrate under Linux. #gdb #cpp #softwarecodingtutorials
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In this video, we go deeper into GDB: conditional breakpoints, post-mortem debugging with coredumps, checkpoints, remote debugging and more.
Colin Stolley 🤍 This talk will examine why and how to use gdb to debug python code and walk through a live example or two.
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today I show how to attach to a python process using gdb and extract a python stacktrace for some really low level debugging! - debugging python segfaults with gdb: 🤍 playlist: 🤍 twitch: 🤍 dicsord: 🤍 twitter: 🤍 github: 🤍 stream github: 🤍 I won't ask for subscriptions / likes / comments in videos but it really helps the channel. If you have any suggestions or things you'd like to see please comment below!
Wir von Dr. Weigl & Partner sind Experten in allen Fragen der Pflege. In diesem Video erklären wir Ihnen alles zum Thema "Grad der Behinderung". 🤍 Eine Frage erreicht uns sehr häufig: Ist es möglich, mit einem Grad der Behinderung, kurz GdB, Pflegeleistungen zu beantragen? Kurz gesagt: Ja, ist es. Jedoch muss man prinzipiell zwischen einem Grad der Behinderung und einem Pflegegrad unterscheiden. Dennoch gibt es Berührungspunkte. Denn Menschen mit einem anerkannten Grad der Behinderung brauchen in vielen Fällen und gerade bei einer Schwerbehinderung eine intensivere Betreuung. Welche Aspekte es hinsichtlich eines Grads der Behinderung zu beachten gilt und wie Sie sich wichtige Pflegeleistungen sichern könne, das erfahren Sie in diesem Video. 🤍 🤍 Pflege ist ein Thema, das viele Menschen in Deutschland beschäftigt. Nicht nur Pflegebedürftige selbst, sondern auch Pflegende Angehörige. Denn nicht nur altersschwache Menschen sind betroffen, Pflegebedürftigkeit kann jeden treffen. So haben beispielsweise auch Kinder mit Diagnosen wie ADHS oder Autismus, oder Menschen mit psychischen Erkrankungen oder körperlichen Behinderungen, Anspruch auf einen Pflegegrad und damit auf Pflegeleistungen verschiedener Art. Anfang des Jahres 2017 wurde um Zuge der Pflegereform das System der drei Pflegestufen umgewandelt. Ziel war es, auch Menschen mit psychischen Erkrankungen und kognitiven Einschränkungen wie Demenz und Alzheimer den Zugang zu Pflegeleistungen zu erleichtern. So wurden aus den 3 Pflegestufen die 5 anerkannten Pflegegrade. Jeder Pflegegrad bringt verschiedene Leistungen mit sich, ab Pflegegrad 2 steigt mit jedem Pflegegrad auch die Höhe des monatlichen Pflegegeldes. Die ganze Komplexität eines Pflegegradverfahrens kann jedoch durchaus abschrecken. Unterschieden wird zwischen drei verschiedenen Möglichkeiten des Pflegegradverfahrens. Zum einen dem Pflegegrad-Erstantrag, die sogenannte Pflegegrad-Einstufung. Wenn noch kein Pflegegrad vorliegt, ist das der erste Schritt zu Pflegeleistungen jeglicher Art. Hat sich der Pflegebedarf mit der Zeit verändert und sind entsprechende Leistungen nicht mehr ausreichend, kann eine Pflegegrad-Höherstufung beantragt werden, um die Leistungen dem eigentlichen Pflegebedarf wieder anzupassen. Wurde ein Pflegegrad jedoch abgelehnt oder kam es zu einer Fehleinstufung, gibt es die Möglichkeit eines Pflegegrad- Widerspruchs. Dieser Fall ist besonders und bringt somit auch besondere Aspekte mit sich, die es zu beachten gilt, um einen Erfolg zu gewährleisten. Zu den drei Pflegegradverfahren informieren wir Sie in folgenden Videos: Pflegegrad- Einstufung: 🤍 Pflegegrad- Höherstufung: 🤍 Pflegegrad- Widerspruch: 🤍 Den Weg zum angemessenen Pflegegrad können Betroffene durchaus alleine gehen, jedoch empfiehlt sich hier eine ganz genaue und intensive Vorbereitung. Bedauerlicherweise scheitert jedes 3. Pflegegradverfahren aus ganz unterschiedlichen Gründen, die vermieden werden können. Die Begutachtung durch den Medizinischen Dienst der Krankenkasse stellt eine besondere Herausforderung dar, an der viele Pflegebedürftige scheitern. Gründe sind nicht nur schlechte Vorbereitung, sondern auch eine oberflächliche Betrachtung der Pflegesituation und der fehlenden fachlichen Erfahrung Betroffener gegenüber ausgebildeten Gutachtern der Krankenkassen. Darum empfiehlt es sich in beinahe jedem Fall, professionelle Hilfe in Anspruch zu nehmen. Nicht nur, um offene Fragen zu klären und tiefer in die Besonderheiten der jeweiligen Erkrankung einzutauchen, sondern auch um sich in Form einer aktiven Begleitung während der Begutachtung Sicherheit zu verschaffen. Und auch pflegende Angehörige wollen wir gerne aufklären und unterstützen: 🤍 Wir von Dr. Weigl & Partner kümmern uns seit vielen Jahren um die Belange von Pflegebedürftigen. Unsere Erfahrung ermöglicht uns den Umgang mit etlichen Fragen der Pflege, und gibt uns die Möglichkeit Pflegebedürftige optimal zu betreuen. Hier bei Youtube möchten wir viele interessante Themen ansprechen und Menschen Einblick in die verschiedenen Felder von Pflegebedürftigkeit und Pflege bieten. Ausführliche Infos über uns finden Sie hier: 🤍 Alle wichtigen Infos und die Möglichkeit zur Nutzung unseres Pflegegradrechners finden Sie außerdem auf unserer Website: 🤍 🤍 🤍 🤍 Kategorie Bildung
This talk was presented at PyBay2019 - 4th annual Bay Area Regional Python conference. See pybay.com for more details about PyBay and click SHOW MORE for more information about this talk. Description GDB is powerful, and can be extended with Python to do more than just one-off debugging. This talk will describe using Python with GDB to with GDB to write tools that interact with running processes, highlighting GDB’s ability to call C functions and how this can be coupled with Python’s C-API to inject code without needing to stop the process. Abstract The first half of the talk will be introductory in nature. I will talk about GDB and some of the specifics of how it can be extended with Python. The second half of the talk I will use the things discussed to create a program that does simple memory analysis of all objects in a running Python process. Introduction- who I am, what this talk is about (1 min) GDB Introduction (3 min) a. What it is typically used for- debugging segfaults, etc b. How it works- ptrace under the hood c. Can execute C code (this will be important later in the talk) d. Source files (also important later in the talk) GDB Python API (6 min) a. Accessing Python from GDB: basic commands (python [command], source, py-list, etc) b. Accessing GDB from Python: To use GDB in Python, from a GDB process, you can import gdb and all of the API is available to you. The API has extensive options to allow for many types of analysis but I will focus on some of the more basic options: executing GDB CLI strings, setting GDB parameters, and creating custom GDB commands. Docs: 🤍 c. Show an example using gdb and Python’s C-API: gdb.execute(‘call PyRun_SimpleString(“print(‘Hello World’)”)’) Problem Statement: I want to know what objects are taking up the most memory in my program, but I don’t want to (or more realistically, can’t) add code to my process to do the data collection. Solution: Use GDB to inject into my running process some memory analysis code (we can use open-source projects like objgraph or pympler to do the memory work for us) and get that data back without killing the debugged process. (2 min) Launch a GDB subprocess and attach to the running process we are interested in debugging. (2 min) In the GDB subprocess command, connect to a Python script file that GDB can use as a ‘source file’. This file will be able to import gdb and use the GDB Python API to create custom commands. (1 mins) Write a custom command by inheriting from gdb.Command and using gdb.execute with PyRun_SimpleString (3 mins) Memory analysis tools can be injected the same way as print(‘Hello World’) using PyRun_SimpleString, but PyRun_SimpleString only likes one line at a time. To get around this, I place all the code I would like executed in another file, and have PyRun_SimpleString run an exec(file.read()) on the open file (3 mins) Two gotchas: locking the GIL, and making sure the running process has access to the memory analysis modules (2 min) Conclusion (2 min) Original slides: 🤍 About the speaker Lisa is a Production Engineer at Facebook and a CPython Core Developer. She is passionate about Python, and has spent time using Python on networking and security teams, and now focuses on improving the language itself and enabling other users of it. Sponsor Acknowledgement This and other PyBay2019 videos are via the help of our media partner AlphaVoice (🤍 #pybay #pybay2019 #python #python3 #gdb
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Just a quick overview of some often-used gdb (and related) commands, including: gcc -g to compile a program and include debugging information start - begin exexuting your program list - examine your source code from within the debugger step - execute the next line of your program next - execute the next line of your program, but if it's a subroutine call, treat the entire subroutine as a single line print - examine the contents of a variable x - examine memory directly watch, rwatch - set a watch for when a variable is written or read: return to the debugger once this happens break - set a breakpoint: return to the debugger when this line of code is about to be executed info watch - show info on watchpoints info break - show info on breakpoints delete # - delete watchpoint or breakpoint "#" cont - continue from a breakpoint, watchpoint, step, next, etc.; basically begin running your program from where it left off set var name=value set the value of variable "name" to "value" bt - show the call frames for your program frame # - set the current frame to #. Variables you reference etc. will be those within that context. quit - leave the debugger
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![GDB 三重阻力正在挡住.[中英文字幕ENG SUB][CC].YT会员问股福利.午时筹码主力线技术分析.31012023.](https://i.ytimg.com/vi/OVcunRDOCKw/mqdefault.jpg "GDB 三重阻力正在挡住.[中英文字幕ENG SUB][CC].YT会员问股福利.午时筹码主力线技术分析.31012023.")
