Synthetic Transaction Monitoring Vs. Real User Monitoring: When To Use Each Approach? In this article, we will discuss two major monitoring approaches: Synthetic Transaction and Real User Monitoring.
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.
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
We value your feedback.
Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
Examines three attack vectors, specifically, the different types of malware used in malicious attacks, web application attacks, and finally, network based attacks. Concludes by examining the means of securing and protecting critical systems and inf…
The viewer will learn how to implement Singleton Design Pattern in Java.
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…
- Shell Scripting
- Programming Languages-Other
- Scripting Languages
- Programming
- Notepad
- *AutoHotkey, *Scripts
Suggested Courses
Course of the Month8 days, 16 hours left to enroll
734 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.