I can't get shark 4.5.0 anymore to read/cache the symbols from
command line applications if they exit before shark finishes
sampling (this worked fine in older versions). It doesn't seem to
detect process exits anymore from such programs, and does not
respect the -T parameter anymore. E.g.
***
$ cat tt.c
int main() {
long long int i;
for (i = 0; i < 100000000; i++) ;
return 0;
}
$ gcc -gstabs -o tt tt.c
$ shark -i -T 1s ./tt
shark 4.5.0
* Option+Esc to start/stop a trace session
* Ctrl+c to quit (any pending session will saved)
* Batch mode
* Watching task exits
Sampling Config: Time Profile
Timed Samples & Counters
-Sampling begins immediately.
-A sample is taken every 1ms.
-Sampling ends automatically after 30s.
When I open the resulting session, all entries for the tt process
show a hexadecimal address followed by [unreadable] (and when double
clicking on them, I get a message stating "Unable to read process
memory. Either you have insufficient privileges or the process
exited and could not be cached."). Furthermore, the sampling does
not stop automatically after 1 second.
If I increase the upper loop bound in the program by a factor of 10
and immediately press ctrl-c after shark starts sampling, it does
read the symbol and debug information ok.
This is on a G5 with Mac OS X 10.4.11, and Xcode 2.5 installed.
Using dwarf instead of stabs, with or without dsymutil, does not
change anything.
Is this a known problem?
When you think you've found a bug, you are always better off filing a
bug report than mailing the list. In this case, some of this will be
fixed in the next CHUD release, but without the example program, etc,
I can't verify for certain that all of it is fixed.
--
Rick Altherr
Architecture and Performance Group
email@hidden
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