[ovs-dev] [PATCH] Utilities: Add the ovs_dump_ofpacts command to gdb

William Tu u9012063 at gmail.com
Mon Apr 20 13:06:22 UTC 2020


On Mon, Apr 20, 2020 at 10:02:15AM +0200, Eelco Chaudron wrote:
> 
> 
> On 19 Apr 2020, at 17:58, William Tu wrote:
> 
> >On Fri, Apr 17, 2020 at 02:51:34PM +0200, Eelco Chaudron wrote:
> >>This adds the ovs_dump_ifpacts command:
> >>
> >>(gdb) help ovs_dump_ofpacts
> >>Dump all actions in an ofpacts set
> >>    Usage: ovs_dump_ofpacts <struct ofpact *> <ofpacts_len>
> >>
> >>       <struct ofpact *> : Pointer to set of ofpact structures.
> >>       <ofpacts_len>     : Total length of the set.
> >>
> >>    Example dumping all actions when in the clone_xlate_actions()
> >>function:
> >>
> >>    (gdb) ovs_dump_ofpacts actions actions_len
> >>    (struct ofpact *) 0x561c7be487c8: {type = OFPACT_SET_FIELD, raw =
> >>255 '', len = 24}
> >>    (struct ofpact *) 0x561c7be487e0: {type = OFPACT_SET_FIELD, raw =
> >>255 '', len = 24}
> >>    (struct ofpact *) 0x561c7be487f8: {type = OFPACT_SET_FIELD, raw =
> >>255 '', len = 24}
> >>    (struct ofpact *) 0x561c7be48810: {type = OFPACT_SET_FIELD, raw =
> >>255 '', len = 32}
> >>    (struct ofpact *) 0x561c7be48830: {type = OFPACT_SET_FIELD, raw =
> >>255 '', len = 24}
> >>    (struct ofpact *) 0x561c7be48848: {type = OFPACT_RESUBMIT, raw = 38
> >>'&', len = 16}
> >>
> >>Signed-off-by: Eelco Chaudron <echaudro at redhat.com>
> >>---
> >Hi Eelco,
> >
> >I'm trying to test this patch. But I hit another problem.
> >Can you help me with the issue? Sorry this is not related to your patch.
> >
> >root at osboxes:~/ovs# gdb $(which ovs-vswitchd) $(pidof ovs-vswitchd)
> >GNU gdb (GDB) 8.0.50.20170501-git
> >Copyright (C) 2017 Free Software Foundation, Inc.
> >License GPLv3+: GNU GPL version 3 or later
> ><http://gnu.org/licenses/gpl.html>
> >This is free software: you are free to change and redistribute it.
> >There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> >and "show warranty" for details.
> >This GDB was configured as "x86_64-pc-linux-gnu".
> >Type "show configuration" for configuration details.
> >For bug reporting instructions, please see:
> ><http://www.gnu.org/software/gdb/bugs/>.
> >Find the GDB manual and other documentation resources online at:
> ><http://www.gnu.org/software/gdb/documentation/>.
> >For help, type "help".
> >Type "apropos word" to search for commands related to "word"...
> >Reading symbols from /usr/local/sbin/ovs-vswitchd...done.
> >Attaching to program: /usr/local/sbin/ovs-vswitchd, process 58469
> >[New LWP 58473]
> >[New LWP 58474]
> >[New LWP 58475]
> >[New LWP 58484]
> >[New LWP 58485]
> >[New LWP 58486]
> >[New LWP 58487]
> >[New LWP 58578]
> >[New LWP 58579]
> >[Thread debugging using libthread_db enabled]
> >Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
> >0x00007fe63d33774d in poll () from /lib/x86_64-linux-gnu/libc.so.6
> >(gdb) source ./utilities/gdb/ovs_gdb.py
> >  File "./utilities/gdb/ovs_gdb.py", line 164
> >    print(self.message, end='')
> 
> The script should work with both versions of python. Is the above the only
> error you get? Or did you forget to cut/paste the actual error message?

> 
> >Is this due to python2/3? My python version:
> >boxes:~/ovs# python
> >Python 3.5.2 (default, Oct  8 2019, 13:06:37)
> >[GCC 5.4.0 20160609] on linux
> >Type "help", "copyright", "credits" or "license" for more information.
> 
Hi Eelco,
That's the only error I got

(gdb) source ./utilities/gdb/ovs_gdb.py
  File "./utilities/gdb/ovs_gdb.py", line 164
    print(self.message, end='')
                           ^
SyntaxError: invalid syntax
(gdb) 



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