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trace: [stderr] add support for dynamically enabling/disabling events

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Uses the generic interface provided in "trace/control.h" in order to provide
a programmatic interface as well as command line and monitor controls.

Signed-off-by: Fabien Chouteau <chouteau@adacore.com>
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
This commit is contained in:
Lluís 2011-08-31 20:31:51 +02:00 • committed by Stefan Hajnoczi
parent 03727e6a06
commit 9a82b6a590
7 changed files with 81 additions and 11 deletions
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5
docs/tracing.txt
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@ -178,11 +178,6 @@ effectively turns trace events into debug printfs.
This is the simplest backend and can be used together with existing code that
uses DPRINTF().
Note that with this backend trace events cannot be programmatically
enabled/disabled. Thus, in order to trim down the amount of output and the
performance impact of tracing, you might want to add the "disable" property in
the "trace-events" file for those events you are not interested in.
=== Simpletrace ===
The "simple" backend supports common use cases and comes as part of the QEMU