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trace: Format strings must begin/end with double quotes

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