There are about 1700 files to change in the source code so this will be broken up into more manageable chunks by sub-tasks.
- relates to
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                    JDK-8324286 Fix backsliding on use of nullptr instead of NULL -           
- Resolved
 
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                    JDK-8324678 Replace NULL with nullptr in HotSpot gtests -           
- Resolved
 
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                    JDK-8324679 Replace NULL with nullptr in HotSpot .ad files -           
- Resolved
 
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                    JDK-8324680 Replace NULL with nullptr in JVMTI generated code -           
- Resolved
 
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                    JDK-8324681 Replace NULL with nullptr in HotSpot jtreg test native code files -           
- Resolved
 
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                    JDK-8324682 Remove redefinition of NULL for XLC compiler -           
- Resolved
 
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                    JDK-8324686 Remove redefinition of NULL for MSVC -           
- Resolved
 
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                    JDK-8327173 HotSpot Style Guide needs update regarding nullptr vs NULL -           
- Resolved
 
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                    JDK-8309043 Replace NULL with nullptr in gtests -           
- Closed
 
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                    JDK-8324799 Use correct extension for C++ test headers -           
- Resolved
 
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