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由 Lluís Vilanova 提交于
Adds a 'TRACE_${NAME}_ENABLED' preprocessor define for each tracing event in "trace.h". This lets the user conditionally compile code with a relatively high execution cost that is only necessary when producing the tracing information for an event that is enabled. Note that events using this define will probably have the "disable" property by default, in order to avoid such costs on regular builds. Signed-off-by: NLluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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