What's in the eBook?
- Full list of reasons for poor performance
- Ultimate measures to speed things up
- Primary web monitoring types
- KPIs you should be monitoring in order to increase your ROI
Course Of The Month
11 days, 11 hours left to enrollBecome a Premium Member and unlock a new, free course in leading technologies each month.
Solved
debugging
Posted on 2011-03-07
hi all,
I have a small program to send file from client to server and it has segmentation fault. I compile them by g++. Could you please show me step by step how to run debugger ? tks.
I have a small program to send file from client to server and it has segmentation fault. I compile them by g++. Could you please show me step by step how to run debugger ? tks.
[X]
Welcome to Experts Exchange
Add your voice to the tech community where 5M+ people just like you are talking about what matters.
- Help others & share knowledge
- Earn cash & points
- Learn & ask questions
-
6
2
- +1
10 Comments
You'll find a complete tutorial here http://www.delorie.com/gnu/docs/gdb/gdb_toc.html ("Debugging with GDB")
i am using those break, run, next, display to trace my "segmentation fault" now. can u show me what i did wrong in my code hihi?
actually you need not even use the debugger. Just insert a lot of log statements in your code. I mean printfs and output these log statements. Then run your program, you will be able to narrow down your search to a few lines as to where the problem might be
Once you have a fair idea of where the problem might be just check the pointer initializations and operations you are doing in your program. It most probably is a simple issue with some pointer you are using
however also take a look at these links
http://www.unknownroad.com/rtfm/gdbtut/gdbsegfault.html
http://www.cprogramming.com/debugging/segfaults.html
Let me know if this helps
Once you have a fair idea of where the problem might be just check the pointer initializations and operations you are doing in your program. It most probably is a simple issue with some pointer you are using
however also take a look at these links
http://www.unknownroad.com/rtfm/gdbtut/gdbsegfault.html
http://www.cprogramming.com/debugging/segfaults.html
Let me know if this helps
for links. I grab those tutorial from here
http://www.csc.sdstate.edu/~gamradtk/resources/debuggercpp.pdf
very succient and enough for me.
I can see that before sending, the buffer is exactly what i expected. But the server can't receive data of that buffer. hix hix.
http://www.csc.sdstate.edu/~gamradtk/resources/debuggercpp.pdf
very succient and enough for me.
I can see that before sending, the buffer is exactly what i expected. But the server can't receive data of that buffer. hix hix.
Active 4 days ago
Core file will be useful in debugging. It has the call stack of the crashed code.
So, install gdb on your computer.
Then invoke gdb with the following command: gdb a.out core
And in the gdb prompt, issue the command: bt
That will show the call stack and the exact place where the code crashed.
For this to work, you will need to compile your code with -g option and then get a core file.
So, install gdb on your computer.
Then invoke gdb with the following command: gdb a.out core
And in the gdb prompt, issue the command: bt
That will show the call stack and the exact place where the code crashed.
For this to work, you will need to compile your code with -g option and then get a core file.
>>>>>>>>The filenam was sent sucessfully. it fails to send trunk of file. please advise.
what do you mean? so have you solved the segmentation fault.
Have you allocated enough memory for the buffer? Is there a buffer overflow? If its a C-string has it been terminated with a null char? How is the socket being declared?
Answer these questions else it is really difficult to figure out your problem
what do you mean? so have you solved the segmentation fault.
Have you allocated enough memory for the buffer? Is there a buffer overflow? If its a C-string has it been terminated with a null char? How is the socket being declared?
Answer these questions else it is really difficult to figure out your problem
Featured Post
It's easy! Check out this step-by-step guide for asking an anonymous question on Experts Exchange.
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
This article is meant to give a basic understanding of how to use R Sweave as a way to merge LaTeX and R code seamlessly into one presentable document.
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.
The viewer will be introduced to the technique of using vectors in C++. The video will cover how to define a vector, store values in the vector and retrieve data from the values stored in the vector.
Suggested Courses
Earn Certification
HTML5 Specialist - Certification
Free withPremium
Course of the Month11 days, 11 hours left to enroll
623 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.