Hi when do we use the '' -w '' when writing a D script? i.e. #!/usr/sbin/dtrace -ws thanks This message posted from opensolaris.org
Melanie Pfefer writes:
> Hi
>
> when do we use the '' -w '' when writing a D script?
> i.e.
> #!/usr/sbin/dtrace -ws
>
> thanks
>
>
> This message posted from opensolaris.org
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If you need the destructive actions within the probes
for instance chill() (a delay) or panic().
The destructive actions are described in Chapter 10 of the
Solaris Dynamic Tracing Guide.
dtrace -w -n ''myfunc:entry{chill(10000)}''
Without the -w I get:
dtrace: error on enabled probe ID 1 (ID 32316: fbt:mymod:myfunc:entry): invalid
kernel access in action #1
-r
found it out. -w allows destructive actions such as stop() This message posted from opensolaris.org
thanks! Why should we write exit(0) after stop()?? thx again This message posted from opensolaris.org
Melanie, Two different processes: the destructive action "stop()" stops the process that caused the probe to fire, while "exit()" causes your D program to exit. Chip Melanie Pfefer wrote:> thanks! > > Why should we write exit(0) after stop()?? > > thx again > > > This message posted from opensolaris.org > _______________________________________________ > dtrace-discuss mailing list > dtrace-discuss at opensolaris.org >