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trace: Format strings must begin/end with double quotes 

Document the restriction that format strings must begin and end with
double quotes.  This is for easy parsing since we don't run cpp over
trace-events.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Stefan Hajnoczi 2010-10-20 16:41:31 +00:00 committed by Blue Swirl
parent d8023f3114
commit cf85cf8e97
1 changed files with 4 additions and 1 deletions
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docs/tracing.txt
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@ -74,7 +74,10 @@ Trace events should use types as follows:
Format strings should reflect the types defined in the trace event. Take
special care to use PRId64 and PRIu64 for int64_t and uint64_t types,
respectively. This ensures portability between 32- and 64-bit platforms.
respectively. This ensures portability between 32- and 64-bit platforms. Note
that format strings must begin and end with double quotes. When using
portability macros, ensure they are preceded and followed by double quotes:
"value %"PRIx64"".
=== Hints for adding new trace events ===