[dtrace-discuss] I do not understand. Please advise.

[Rayson Ho]

Sorry, ignore my previous message, I was thinking in C/C++ :(

Rayson



On 7/4/07, Rayson Ho <rayrayson at gmail.com> wrote:
> system(3) takes 1 argument only:
>
>  int system(const char *command);
>
> In your case, you will need to use sprintf(3) to generate the needed string.
>
> Rayson
>
>
>
> On 7/4/07, Paul van den Bogaard <Paul.VandenBogaard at sun.com> wrote:
> > I have the following script:
> >
> > proc:::exec-success
> > /execname == "java"/
> > {
> >    stop();
> >    printf("Restart with prun %d\n", pid);
> > }
> >
> > This one stops any java process that I start (and others :-). Runs as expected. I "prun pid" and that stopped java process continues.
> >
> > Now I add a single line directly after the printf:
> >
> >    system("./scanit.d -p %d", pid);
> >
> > scanit.d uses the hotspot probes to dive into this java process just started.  If scanit.d is started from the command line it works as I expect it. However when started through the above mentioned "system(...)" way, an error is raised and the stopped java process is started again!
> >
> > The message is:
> >
> > dtrace: failed to compile script ./scanit.d: line 17: args[ ] may not be referenced because probe description hotspot4051:::method-entry matches an unstable set of probes
> >
> > What am I missing? (and yes I did start the java process with -XX:+ExtendedDTraceProbes)
> >
> > Thanks
> > Paul
> > --
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