From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx> In order to be able to have API that can do onmax() and onchange() as well as include the .save() and .snapshot() actions, we need to make sure that the variable names are unique even between different events. The first adds a "randomness" to the name, and the second patch fixes an issue where the "end" event fields are saved in the same name as they are called, then the ".save" action can not be used on them. Changes since v1: - Use open coded "rand()" as rand() is not reentrant, and it we use our own seed each time. - Use gettimeofday() instead of time() as Yordan pointed out that time() has a resolution of 1 second, and a thread could call this for different synthetic events. Steven Rostedt (VMware) (2): libtracefs: Add random number to keep synthetic variables unique libtracefs: Have end event variables not be the end event field name src/tracefs-hist.c | 45 +++++++++++++++++++++++++++++++++++---------- 1 file changed, 35 insertions(+), 10 deletions(-) -- 2.30.2
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