On 27 February 2018 at 10:24, Peter Maydell <peter.mayd...@linaro.org> wrote: > docs/devel/tracing.txt describes them, but basically: > * include "trace.h" > * define trace events with a line for each in the trace-events > file for the subdirectory (basically a function prototype-ish > thing followed by a printf-style format string) > * call them like normal function calls with a trace_ prefix > > commit 1b640aa9292bc00beb441e97d862ba322a7ba18d is a recent one > which converted some DRINTFs in hw/sd/sd.c to trace events.
...and you can test them most conveniently with the QEMU -d argument: "-d trace:sii9022*" will enable tracing to stderr of all trace events with names that begin 'sii9022'. thanks -- PMM
