Here's my complete Mac solution. It misses the dynamic linking phase,
I'm afraid, which is not something that 'dtrace -c ...' was doing. It
does allow apps to run in their native environment, though, as opposed
to as root.
I can launch it like this, for example, to stop once my USDT probe is
fired in the Firefox main().
./d firefox-bin startup.d stop-main.d
or to figure out the time spent by Firefox on the CPU during the first
10s of startup:
./d firefox-bin cpu.d stop-10s.d
d:
#!/bin/bash
progname=$1
shift
scripts="-s sigcont.d"
for i in $*; do scripts="$scripts -s $i"; done
opts="-Zqw -x dynvarsize=64m -x evaltime=exec"
dtrace='
inline string progname="'$progname'";
inline string scripts="'$scripts'";
inline string opts="'$opts'";
proc:::exec-success
/execname == progname/
{
stop();
printf("dtrace %s -p %d %s\n", opts, pid, scripts);
system("dtrace %s -p %d %s\n", opts, pid, scripts);
exit(0);
}
'
sync && purge && dtrace $opts -n "$dtrace"
---
sigcont.d:
BEGIN
{
printf("kill -CONT %d\n", $target);
system("kill -CONT %d\n", $target);
}
---
All the scripts are up on Github [1] and I love building these chains
of "lego blocks" in different permutations.
[1] http://github.com/wagerlabs/firefox-startup/tree/master
---
fastest mac firefox!
http://wagerlabs.com
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