I just want to dump core without stopping the program. This would be essentialy serializing a whole state of the program. A very convenient thing for debugging later.
Is it possible under linux?
views:
189answers:
5
A:
should be doable, at least /proc//smaps contains information of the process memory and the actual memory should be accessible via /dev/mem
I think you need to suspend the process to avoid corruption of the captured info, though.
Kimvais
2009-10-07 11:21:18
+2
A:
What you're looking for is a "time travel debugger" which can travel back in time to the previous state of the program you're debugging.
There is one commercial product for Linux called UndoDB.
ssg
2009-10-07 11:40:48
Indeed, that's what I'm looking for.
Łukasz Lew
2009-10-07 12:27:17
It is free (as in beer) for non-commercial use :D I will give it a try.
Łukasz Lew
2009-10-07 12:30:56
+4
A:
I found simple solution:
$gcore
usage: gcore [-o filename] pid
It is distributed with gdb.
Łukasz Lew
2009-10-07 12:40:39
That looks like the kind of program I've wanted for years! Much more reliable than kill -11 :-) Thanks Łukasz!
Arthur Reutenauer
2009-10-07 12:45:03
A:
Even better!!! Gdb 7.0 have support for reversible debugging. And it was released yesterday, what a coincidence :D
Łukasz Lew
2009-10-07 14:22:09