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b/docs/tracing.txt
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Format strings should reflect the types defined in the trace event.  Take


  		





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special care to use PRId64 and PRIu64 for int64_t and uint64_t types,


  		





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respectively.  This ensures portability between 32- and 64-bit platforms.


  		





  
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respectively.  This ensures portability between 32- and 64-bit platforms.  Note


  		





  
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that format strings must begin and end with double quotes.  When using


  		





  
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portability macros, ensure they are preceded and followed by double quotes:


  		





  
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"value %"PRIx64"".


  		





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=== Hints for adding new trace events ===


  		





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