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This article looks at one success story using debug traces and assertions, and presents an improved debug class. NET provides two mechanisms to aid the programmer in diagnosing and correcting programming errors. One is the Debug class, and the other is the Trace class.
These two classes contain an Assert function. The Assert statement is used to verify value, and in many cases, that the value of, say a pointer, is not null after invoking some system API.
Finally, life as a programmer is complicated by the fact that we build two kinds of versions of our programs—the debug version and the release version.
An Example Of A Project Development That Worked Several years ago I was the team leader for a multi-channel video surveillance system, accepting video feeds from up to 64 cameras over four RS lines, connected either directly to the video sources or via a leased line modem or a dial up line.
Asserts We also asserted the correctness for parameter inputs to all functions and asserted the return values of those functions. An assertion was also output to the debug log. When an assert occurred, the debug log was closed, a message was displayed, and the program was terminated.
After correcting various perceptions, the QA people actually started producing useful work. As a result of our instrumentation of all GUI events, we never had to ask what the tester did, we could figure it out from the log.
Development Testing Needless to say, the instrumentation was highly useful during our own coding especially coupled with version control, which allowed us to revert to previous versions and test the same event sequence. Shipped Ahead Of Schedule Management, having been burned on previous projects and having irate customers to deal with, allocated 3 months for testing an unheard of amount of time because the coding took only 6 months, and testing was ongoing during coding also!
After only one month, the QA department was unable to find further bugs and the product shipped ahead of schedule. Debug For performance reasons, because the application described above was so heavily instrumented, we turned off all trace statements but left in the assert statements in the release mode.
This was also done because in the field the program would be running continuously, and the log file would get unmanageably large. Furthermore, the assert statements produced a valuable message as to where and why the assert occurred, because inevitably something will fall through the QA testing process, especially in the world of ever changing hardware.
I believe that this is a good philosophy, to ship an un-instrumented release version to the customer. If the customer is repeatedly having problems and they are willing to work with you, then you can send them a debug version with full trace capability.
In addition, with a properly implemented assertion handler, you can display a graceful error message to the user. Trace In Ctwo classes, Debug and Trace, are provided. While both can be disabled, by default both are on in the debug build mode. When in the release build mode, the Debug functions are disabled while the Trace functions remain enabled.
Now, both classes support assertions and tracing, however, given the names of these classes, one would more likely use Debug. Assert for assertions and Trace. If you buy into the logic I discussed regarding asserts and traces, this is exactly the wrong thing to do.
Because of performance and application lifetime considerations, the pure trace functions should be removed in the release version, and the Debug.
Assert statements should be left in! Thus, an application should use Debug. Write for traces and Trace. When built under release mode, the Debug. Write statements are inactivated but the assertions are left in. The Trace Switch C has the ability to, without recompiling, modify the trace flag.
This enables you to turn on tracing at different levels in a release version of your program. I consider this to be of dubious value for two reasons—one, your program still incurs the performance hit of the function call, and second, anyone with minimal programming experience can adjust the trace level and thus learn important information about your program that my reveal corporate secrets or compromises the security of your system.
This is another good reason not to use the Trace class for instrumentation logs. This means that we are now left with the dilemma of how to handle the exception. In the old days, we would have handled the error either with an assert or a conditional test, assuming there was some graceful way to back out of the function.
So, how do we deal with exceptions from the viewpoint of asserts, traces, debug and release builds?regardbouddhiste.com & regardbouddhiste.com - both works in Debug mode, while in Release Mode,regardbouddhiste.com only will regardbouddhiste.com changing the Active Config property of Solution in Property page nd find the difference.
regardbouddhiste.com is used while debuging a project and regardbouddhiste.com is used in Released verion of Applications. How many types of Decorator are present in Angular?
When we have to use Interface and Abstract practically?.NET interview questions: Can you explain architecture of your project? In this blog I am going to explain basic difference between debug and trace. For Debug we can use regardbouddhiste.com() method. Debug runs in same thread as main program execute.
Trace. For Trace we can use regardbouddhiste.com() method. It uses time of application deployment. Difference Between Debug and Trace;. What is the difference between regardbouddhiste.com and regardbouddhiste.com? When should each be used? Stack Overflow new.
What is the difference between regardbouddhiste.com and regardbouddhiste.com? When should each be used?.net. share Difference between decimal, float and double in . In Visual regardbouddhiste.com , the regardbouddhiste.com, regardbouddhiste.comf, regardbouddhiste.comine, and regardbouddhiste.comineIf methods have been replaced with the regardbouddhiste.com method that was available in earlier versions of Visual Basic.
Sure sounds like regardbouddhiste.com was a hold over from pre-C# days. dot net framework interview questions for experienced, dot net framework interview questions 6 years experience, dot net framework interview questions, entity framework interview questions dot net tricks,.net framework interview questions for 5 years experience, dot net framework interview questions pdf Explain the difference .