[Bug kprobes/2726] systemtap.base/probefunc.exp crash in kernel/module.c:2114 on RHEL4

["ananth at in dot ibm dot com" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From ananth at in dot ibm dot com  2006-06-13 07:06 -------
Created an attachment (id=1082)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=1082&action=view)
C module probing scheduler_tick()

I've now tried today's systemtap snapshot with UNI and SMP .39 kernels while
simultaneously running:

1. A kernel build
2. The scheduler_tick script (with a timeout of 5 seconds) in a loop (to
simulate any issues with module loading/unloading)
3. The C module probing scheduler_tick() (attached to this bug)
4. The strace-open.stp example from the systemtap tutorial

I haven't been able to see a problem or any fatal errors in the dmesg (except:
ERROR: user string copy fault at 0x080c571a near identifier '$filename' at
/usr/local/share/systemtap/tapset/syscalls2.stp:27:25
when running the strace-open.stp).


[root@...]# cat /proc/cpuinfo
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 15
model		: 2
model name	: Intel(R) Xeon(TM) CPU 2.80GHz
stepping	: 7
cpu MHz 	: 2795.658
cache size	: 512 KB
physical id	: 0
siblings	: 2
core id 	: 0
cpu cores	: 1
fdiv_bug	: no
hlt_bug 	: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 2
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr
bogomips	: 5591.89

Will, could you please try recreating the problem with the plain C module?

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=2726

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