fche changed the topic of #systemtap to: http://sourceware.org/systemtap; email systemtap@sourceware.org if answers here not timely, conversations may be logged
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<Amy1>
how to print current line number?
<Amy1>
I test this "usymline(uaddr())" work.
<fche>
Amy1, hm should work
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<Amy1>
fche: what is hm?
<fche>
just thinking noise :)
<fche>
usymline(uaddr()) should work
<fche>
how are you testing?
<Amy1>
Set a mark, and print the line
<Amy1>
Many ways can achieve this.
<Amy1>
I learned stp for a week when last time I spoke in here. Today, I help others and I can use stp freely.
<fche>
nice!
<Amy1>
lol
<Amy1>
fche: thank you very much. Give us this excellent good tool.
<Amy1>
Save us life time.
<fche>
heh
<fche>
am testing usymline(uaddr()) now and seeing it not work right,
<fche>
sudo ./stap -e 'probe process.function("main") { print(usymline(uaddr())) }' -d ./stap -c ./stap with a freshly built stap
<fche>
bad stap bad bad sta
<Amy1>
do you compile program using -g?
<Amy1>
and usysline only work in user space.
<Amy1>
If you trace kernel space , it should symfileline(addr())
<fche>
yes
<Amy1>
Did it work now?
<fche>
nah, there is something wrong with at least the userspace side
<Amy1>
Did you try statement?
<Amy1>
wait a minute, I test it using "process".
<Amy1>
wait a minute, I test it using "function"
<Amy1>
I test it work
<Amy1>
probe process("*").function("main")
<Amy1>
{
<Amy1>
printf("%s\n",usymline(uaddr()));
<Amy1>
}
<Amy1>
sudo stap p.stp -c ./a.out
<fche>
you want process.function("main") rather than process("*")
<fche>
the * is too wide
<Amy1>
yeah, I have use stap -L to see probe point. There only one point, and it is my desired.
<Amy1>
When I try again, an error occured...
<Amy1>
no, again error not occured.
<Amy1>
Oh, I had try many times in diffrent machine, it works.
<Amy1>
The error is occured when I use full path in process(“/xxx/xx/a.out”).function("main@/xxx/xx/main.c:3") in one machine. The machine seems problem of permission.
<fche>
ok
<Amy1>
Now I test again, all machines and path work
<Amy1>
cool
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