| 1 |
On Saturday 13 January 2007 09:42, Michael Sullivan wrote: |
| 2 |
> This strace doesn't help me much. What does "attached" mean, anyway? |
| 3 |
|
| 4 |
I don't know what the problem is, but I can tell you that strace "attaches" to |
| 5 |
a process meaning that it begins to watch the process to see what system |
| 6 |
calls it is making. If the process doesn't make any system calls, then you |
| 7 |
won't see anything with strace. For example, |
| 8 |
|
| 9 |
#define BIG_NUMBER 4e15 |
| 10 |
main () { |
| 11 |
long x; |
| 12 |
for(int i=0; i<BIG_NUMBER; i++) |
| 13 |
x+=i; |
| 14 |
} |
| 15 |
|
| 16 |
When this small program is in the loop, it will not be making any system calls |
| 17 |
(i.e., no output/input or other system calls) so it will be a very busy |
| 18 |
process but it won't show anything in strace. Hope that answers your |
| 19 |
question! |
| 20 |
|
| 21 |
-- |
| 22 |
Randy Barlow |
| 23 |
http://www.electronsweatshop.com |
| 24 |
"Oh me of little faith..." |
| 25 |
-- |
| 26 |
gentoo-user@g.o mailing list |
Archives