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Re: [Bug kprobes/2091] New: system crash when running "./systemtap.stress/current.stp" on power
- From: "Gui,Jian" <guij at cn dot ibm dot com>
- To: "jkenisto at us dot ibm dot com" <sourceware-bugzilla at sourceware dot org>
- Cc: <systemtap at sources dot redhat dot com>
- Date: Thu, 22 Dec 2005 11:06:23 +0800
- Subject: Re: [Bug kprobes/2091] New: system crash when running "./systemtap.stress/current.stp" on power
- References: <20051222024233.2091.jkenisto@us.ibm.com>
My suggestions for diagnosing this bug include:
1. Try the same thing without the entry probes.
2. Try the same thing without the return probes.
3. Run "stap -p3 xxx.stp > xxx.c" and extract the list of kretprobe
probe
addresses (dwarf_kprobe_1[]?). Build a C module that establishes
entry kprobes
and/or return probes for all these functions. See if that crashes.
If so, keep
removing functions from the list until you get a module that doesn't
cause a
crash. Keep playing with the list until you figure out a minimal
list to
demonstrate the bug.
Thanks for your suggestions. I've tried 1 and 2, and no crashes. I'll
try 3
to minimize the list.