I've written about 1000 lines of D code (using lots of cpp),
in order to generate parsable logs of system activity. The
output format looks like:
syscall={
func=13'open_nocancel'
pid=9171
ppid=8738
time=63505036663689
av={
path=40'/dev/dtracehelper'
oflag=0
mode=438
}
rv=3
}
For the curious, the format is Boulder IO with counted
strings. I came up with this format in order to keep D
from needing to escape oddball characters, etc.
The problem is, sometimes the code acts in peculiar ways.
Most of the time, it prints (correctly):
path=17'/dev/dtracehelper'
But sometimes (as in the output format example), it prints:
path=40'/dev/dtracehelper'
I suspect that someone here can help me find the bug (and
most likely, in the process, teach me some D lore :-). I
certainly hope so...
FYI, the code below was generated by some macros. I then
edited the white space a bit for this posting. Consequently,
it may look a bit odd in spots. Try to ignore that detail...
-r
syscall::open*:entry {
self->arg2 = arg2;
self->arg1 = arg1;
self->arg0 = arg0;
self->follow = 1;
}
syscall::open*:return /self->follow != 0/ {
printf("\n");
printf("syscall={\n");
func_l = strlen(probefunc);
printf(" func=%d'%s'\n", func_l, probefunc);
printf(" pid=%d\n", pid);
printf(" ppid=%d\n", curpsinfo->pr_ppid);
printf(" time=%d\n", timestamp);
printf(" av={\n");
path = copyinstr(self->arg0);
path_l = strlen(path);
printf(" path=%d'%s'\n", path_l, path);
printf(" oflag=%d\n", self->arg1);
printf(" mode=%d\n", self->arg2);
printf(" }\n");
printf(" rv=%d\n", arg0);
printf("}\n");
}
syscall::open*:return {
self->arg2 = 0;
self->arg1 = 0;
self->arg0 = 0;
self->follow = 0;
}
--
http://www.cfcl.com/rdm Rich Morin
http://www.cfcl.com/rdm/resume [EMAIL PROTECTED]
http://www.cfcl.com/rdm/weblog +1 650-873-7841
Technical editing and writing, programming, and web development
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