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[Bug runtime/6417] Wildcard probe hangs system
- From: "srinivasa at in dot ibm dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 16 Apr 2008 09:53:18 -0000
- Subject: [Bug runtime/6417] Wildcard probe hangs system
- References: <20080416093350.6417.ananth@in.ibm.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From srinivasa at in dot ibm dot com 2008-04-16 09:53 -------
Created an attachment (id=2700)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=2700&action=view)
Patch to blacklist atomic_* functions.
When we use wildcards in scripts, Systemtap probes all functions present in the
file(s). For example, probe module("ext3").function("*") will probe all
functions called in fs/ext3/*.c, which includes atomic_* functions too.
But atomic_* functions are used in systemtap/kprobes and might be in
handlers,so we need to blacklist these functions.
In addition, get_bh() and put_bh() are both inline functions but in turn use
atomic functions. Ideally the atomic_* blacklist needs to take care of this,
but doesn't (probably 'cos of the way inlines are handled currently). So,
blacklist them too.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6417
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