* Rui Han ([email protected]) wrote: > Dear all, > > I am working on retrieving socket information for socket related syscalls > by the kernel trace, such as sys_connect() and sys_bind(). What I did is in > the .h file > "instrumentation/syscalls/headers/x86-64-syscalls-3.0.4_pointers.h", I > modify the sys_connect SC_TRACE_EVENT. I add _field(size_t, port) and > tp_assign(port, getport() ) to the TP_STRUCT_entry() and TP_fast_assign(), > respectively. The getport() function is a function I wrote to retrieve the > port number and ip address by the function getpeername(). The lttng module > got installed correctly after the modification, (with some #ifndef > manipulations), However, when I reboot the machine and try to do the kernel > trace. It gives me error messages: > > Spawning a session daemon > FATAL: Error inserting lttng_tracer > (/lib/modules/3.2.0-29-generic/extra/lttng-tracer.ko): Unknown symbol in > module, or unknown parameter (see dmesg) > Error: Unable to load module lttng-tracer > Warning: No kernel tracer available > Warning: No tracing group detected > Session rui-session created. > Traces will be written in /root/lttng-traces/rui-session-20120813-133953 > FATAL: Error inserting lttng_tracer > (/lib/modules/3.2.0-29-generic/extra/lttng-tracer.ko): Unknown symbol in > module, or unknown parameter (see dmesg) > Error: Unable to load module lttng-tracer > Warning: No kernel tracer available > > and in the syslog file: I got the following error: > [ 82.001603] lttng_tracer: Unknown symbol getport (err 0) > [ 82.377213] lttng_tracer: Unknown symbol getport (err 0) > > I am new to the kernel module programming. My question is: should I do some > kinds of symbol register before define a function in the kernel space? Any > suggestion for solving the problem?
I think your tracepoint probe cannot find the getport() symbol you created. Sounds like an issue with the way you declared/defined getport() within lttng-modules. Sorry for the late reply, Thanks, Mathieu > > Thanks, > Rui -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
