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Document how to enable USDT method entry/exit tracepoints

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Avdi Grimm 2020-05-16 16:29:05 -05:00 • committed by Samuel Williams
parent 0e5a58b6bf
commit afd84c58ac
Notes: git 2020-05-18 14:39:47 +09:00
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6
doc/dtrace_probes.rdoc
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@ -56,10 +56,16 @@ with when they are fired and the arguments they take:
methodname name of the method about to be executed (a string)
filename the file name where the method is _being called_ (a string)
lineno the line number where the method is _being called_ (an int)
*NOTE*: will only be fired if tracing is enabled, e.g. with: +TracePoint.new{}.enable+.
See {ticket #14104}[https://bugs.ruby-lang.org/issues/14104] for more details.
[ruby:::method-return(classname, methodname, filename, lineno);]
This probe is fired just after a method has returned. The arguments are the
same as "ruby:::method-entry".
*NOTE*: will only be fired if tracing is enabled, e.g. with: +TracePoint.new{}.enable+.
See {ticket #14104}[https://bugs.ruby-lang.org/issues/14104] for more details.
[ruby:::cmethod-entry(classname, methodname, filename, lineno);]
This probe is fired just before a C method is entered. The arguments are the