In my previous posts, I covered a four-step strategy for preparing the application for the 64-bit porting process:
- Apply mutation testing to perform run time error detection
- Use static code analysis to identify error-prone and non-portable code
- Repeat run time error detection
- Perform unit testing (Optional)
- Recompile the code on the 64-bit processor
- Repeat static analysis code inspection
- Link and build
- Get the application running
- Repeat runtime error detection
Step 1: Recompile the code on the 64-bit processorRecompile your application on the 64-bit processor. If you have trouble compiling it, work out all of the quirks related to compiler variations. You might also want to create static code analysisrules that will automatically identify the code associated with these quirks so that you can prevent these compilation problems from occurring in the future.
Step 2: Repeat static analysis code inspection
Once you recompile the code, perform static code analysis again to check if the new code complies with all appropriate coding standards. At this point, every change that should have been made but that was not made is an error. Fix these errors immediately! You don’t want to look for these errors as the application is running.
Step 3: Link and build
Link your application and try to build it.
Step 4: Get the application running
At this point, you should try to run your code. If you have a problem getting code running on the 64-bit processor, use a unit testing framework to run the code function by function; that way, you can flush exactly what in the code is not portable. Test the function, and then fix the problem. Continue this process until the entire application is running.
Step 5: Repeat run time error detection
Once the application is running, you’ll want to repeat run time error detection because the porting process is likely to cause some new problems that could not be detected before the port (for example, new memory corruption problems or different behaviors). If the run time error detection exposes problems, fix every bug related to porting.
Photo Credit: jurvetson
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