|
Hi Coders,
Here's a code which I wrote few days ago. When I run it it caused my pc hanged. I had to restart my pc for it.
I was creating a windows service few days ago. In that, I put a "Timer Control". And according to it's ticks, I wanted to run my process.
And, for checking purpose by mistake I wrote following Process.Start instead of EventLog.WriteEntry in my code:
private void onTimerEvent(object sender,System.Timers.ElapsedEventArgs e)
{
Process.Start("notepad.exe");
}
It was ok till now but then I put Timer Duration to 100 milisconds!!!!!!!
When I started my Service and Bllllaaaassdsstttt!!!!!!!
My screen was full of NotePads.... n kept comming every 100 miliseconds!!!! until I restarted.
Anand Desai
Developer
Atharva Infotech
|
|
|
|
|
Anand Desai wrote: My screen was full of NotePads.... n kept comming every 100 miliseconds!!!! until I restarted.
LOL
Anand Desai wrote: Process.Start("nodepad.exe");
Funny, I was expecting a FileNotFoundException
|
|
|
|
|
Noways.... try it. if u dont give path in "Process.Start", it itself take the path of Windows like "C:\\Windows".
This wont give "FileNotFoundException "
Anand Desai
Developer
Atharva Infotech
|
|
|
|
|
... you spelt Notepad wrong...
In your code snippet, it says: "nodepad.exe".
|
|
|
|
|
Ohhh... sorry but that's typing mistake in this site. in my project I actually wrote notepad.exe
Anand Desai
Developer
Atharva Infotech
|
|
|
|
|
#define FILE_NOT_FOUND "notepad.exe"
Today's lesson is brought to you by the word "niggardly". Remember kids, don't attribute to racism what can be explained by Scandinavian language roots.
-- Robert Royall
|
|
|
|
|
|
Good choice
"The shortest distance between two points is under construction"
-Noelie ALtito
|
|
|
|
|
Oops
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
|
|
|
|
|
|
Anand Desai wrote: My screen was full of NotePads.... n kept comming every 100 miliseconds!!!! until I restarted.
It's the revenge of the notepads because you've been spending too much time with your insert dev env name here .
|
|
|
|
|
Get it an expensive perfume or scrap-booking kit to shut it up.
He who asks a question is a fool for five minutes. He who does not ask a question remains a fool forever. [Chineese Proverb]
Jonathan C Dickinson (C# Software Engineer)
|
|
|
|
|
Could've been worse:
private void onTimerEvent(object sender,System.Timers.ElapsedEventArgs e){
Process.Start("devenv.exe");
}
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan
Portland, Oregon, USA
|
|
|
|
|
No it can go worse far
If I put that this windows service StartMode to "Automatic":
Just imagine, when ever I start my pc, my blasting windows service also get started automatically n starts throwing notepads to my desktop every 100 miliseconds!!!...untill I restart.. and loop continue........ DeadLock
Hey, This seems simple virus, insn't it?
Anand Desai
Developer
Atharva Infotech
|
|
|
|
|
Yeah, don't get any ideas.
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan
Portland, Oregon, USA
|
|
|
|
|
Surely running in safe mode would give you the chance to correct this
|
|
|
|
|
I inherited a Borland Win32 application that has over 60 global variables interspersed throughout it. Many of the globals are multilevel struct instantiations.
Nearly every class definition has a line similar to this after it: "extern PACKAGE TTree *Tree;" The actual declarations of these variables are either in the code for the "about page", above the program's "main" function, or in "globals.cpp"
There is a file called "structs.h" which contains the definitions for every struct used in the application. structs that have to do with the database, visual controls, file contents, etc are all in the same file. The file is 6,000 lines long.
There is a file called "globals.h" that is 3,000 lines long that is nothing but #defines. The #defines are related to, you guessed it: database, individual visual controls, different file formats, and other processing specific code. The file is included in every .cpp file. Very few of the #defines have meaning in more two .cpp files.
8 of the 28 .cpp files in the project are over 10,000 lines long. The longest is 14,433 lines. Most of the code in these mammoths has nothing to do with what the file name would have you think they are doing.
Instead of using one of the hundred different XML processing libraries out there, this guy decides to write his own in order to make a way of saving data. The produced files aren't even valid XML so I can't replace it with a more efficient XML processor. I have to maintain his version of XML syntax for backward compatibility.
There isn't a single pass by reference in the entire application. It is all pointers.
There is no function polymorphism being performed. There are a ton of functions with parameters that specify the kind of data being handled with switch-cases that handle different kinds of data.
Every struct declaration looks like this: "struct CALIB_STRUCT Calib;" Always all caps, always has the "struct" keyword, and always ends with "_STRUCT".
There is no real naming scheme. Sometimes constants are all caps, sometimes they aren't, sometimes they are structs.
He declares every variable that could possibly be used by the function at the top of the function. This includes those huge structs that never get used. Get this guy a copy of the C++ standard please! Many functions are over 500 lines long. Thank goodness for split-screened editors.
The only container that is used are statically defined arrays (usually of structs) even when there is no way to know how many elements will be in it. He just makes it big and forgets about it.
There is no class inheritance, encapsulation, polymorphism, or specialization for different kinds of data. Just dozens of functions with huge multilevel switch-case statements to handle the "special" cases of each type of data.
Every function, I mean every single function, has something similar to this as its first line:
AnsiString errorHeader = "Showing Probe Calibration Error: ";
errorHeader += "Function Where Error Occurred: ";
errorHeader += "TfrmConfig::SaveCalData(); Type of error: ";
Every function, I mean every single function, has this exact code at the end (misc is a global of type TMisc):
} // end catch
catch(Exception &e)
{
errorMsg = errorHeader;
errorMsg += e.ClassName();
errorMsg += " Exception; Error message: " + e.Message;
if (Misc)
Misc->LogSystemError(errorMsg);
error = EI_KNOWN_EXCEPTION;
}
catch(...)
{
errorMsg = errorHeader + "Unknown Error";
if (Misc)
{
Misc->LogSystemError(errorMsg);
}
error = EI_UNKNOWN_EXCEPTION;
}
return error;
There is no other exception handling being performed.
The list goes on. These are just the things I can easily describe here. Overall, this guy just loves to copy and paste code. Apparently making a robust function or class specialization is just too much work.
In debugging and running the code, I find that along a single execution path functions may be needlessly called multiple times to fill visual controls with statically defined data. I am seriously terrified to run a code profiler on it. This guy wrote another similar size app here that has also landed in my lap.
Did I mention that this guy teaches at ITT Tech? He no longer works here (I replaced him). Oddly enough, he wasn't let go for incompetence.
|
|
|
|
|
Ugh, my wife was the director of placement at an ITT Tech a bunch of years ago (late 90s).
One day she came home and said I "had to" look at this great website one of the graduates had created for his employer.
It was all jpg images! That's what they were being taught. I couldn't read a word of it.
Dreadful dreadful dreadful.
Then again, the C code I wrote when just out of college has warts all its own. New programmers really have to work under the supervision of experienced developers.
|
|
|
|
|
PIEBALDconsult wrote: Then again, the C code I wrote when just out of college has warts all its own. New programmers really have to work under the supervision of experienced developers.
I have to agree. No matter how smart a person is they need to work with someone who really knows the business. That is why in the old days trades had apprentices and journeymen that were taught by masters of their craft. Nowdays, anyone with a couple programming classes thinks they are a programmer.
Bill W
|
|
|
|
|
Geeze.
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
|
|
|
|
|
Great, so now he's teaching his brand of programming to the next generation of Indian programmers.
More job security for the west then. Brillant.
|
|
|
|
|
No, that'd be IIT. ITT is a US tech school (2 year degrees) chain.
Today's lesson is brought to you by the word "niggardly". Remember kids, don't attribute to racism what can be explained by Scandinavian language roots.
-- Robert Royall
|
|
|
|
|
Ah my bad. easy mistakea-to-makea.
|
|
|
|
|
maizhiming wrote: aren't even valid XML
You mean not well-formed?
|
|
|
|
|
Here is an example:
<Stagenumber="0" minaw="0.1" maxaw="0.8" desorpFr="300" adsorpFr="300" used="true"/>
I didn't know elements could have values. Well they can't. XML viewers won't even read it.
You should see the code that parses this. It is pretty much one gigantic function that reads in the file character by character.
|
|
|
|