From: "Zhang, Yanmin" <yanmin.zhang@intel.com>
To: "Roland McGrath" <roland@redhat.com>, <prasanna@in.ibm.com>
Cc: <systemtap@sources.redhat.com>,
"Keshavamurthy, Anil S" <anil.s.keshavamurthy@intel.com>,
"Mao, Bibo" <bibo.mao@intel.com>
Subject: RE: Review patches of user space kprobe
Date: Mon, 09 Jan 2006 02:04:00 -0000 [thread overview]
Message-ID: <8126E4F969BA254AB43EA03C59F44E8404692DAA@pdsmsx404> (raw)
>>-----Original Message-----
>>From: systemtap-owner@sourceware.org [mailto:systemtap-owner@sourceware.org] On Behalf Of Roland McGrath
>>Sent: 2006年1月6日 18:31
>>To: prasanna@in.ibm.com
>>Cc: Zhang, Yanmin; systemtap@sources.redhat.com; Keshavamurthy, Anil S; Mao, Bibo
>>Subject: Re: Review patches of user space kprobe
>>
>>> I think the dll's share the same vma's.
>>
>>You cannot rely on mapping addresses being the same, they are not always
>>so. There are always separate vm_area_struct's in separate processes even
>>when they appear to be identical.
I agree with Roland. Although sometimes they appear to be identical, the vma themselves are different. And a vma might be released/reallocated before readpage/readpages are called. It's easy to introduce race condition when storing temp member in uprobe.
next reply other threads:[~2006-01-09 2:04 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-09 2:04 Zhang, Yanmin [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-01-09 2:06 Zhang, Yanmin
2006-01-09 1:48 Zhang, Yanmin
2006-01-06 9:12 Zhang, Yanmin
2006-01-06 9:28 ` Prasanna S Panchamukhi
2006-01-06 9:08 Zhang, Yanmin
2006-01-06 10:22 ` Prasanna S Panchamukhi
2006-01-06 10:30 ` Roland McGrath
2006-01-06 5:29 Zhang, Yanmin
2006-01-06 9:08 ` Prasanna S Panchamukhi
2006-01-06 5:22 Zhang, Yanmin
2006-01-06 9:04 ` Prasanna S Panchamukhi
2006-01-06 4:27 Zhang, Yanmin
2006-01-06 12:28 ` Prasanna S Panchamukhi
2006-01-06 3:20 Zhang, Yanmin
2006-01-06 8:53 ` Prasanna S Panchamukhi
2006-01-06 2:52 Zhang, Yanmin
2006-01-06 6:53 ` Prasanna S Panchamukhi
2006-01-05 7:09 Zhang, Yanmin
2006-01-05 11:27 ` Prasanna S Panchamukhi
2005-12-22 13:24 Zhang, Yanmin
2006-01-05 11:10 ` Prasanna S Panchamukhi
2005-12-22 7:14 Zhang, Yanmin
2005-12-22 5:41 Zhang, Yanmin
2005-12-22 6:00 ` Vara Prasad
2006-01-05 11:06 ` Prasanna S Panchamukhi
2005-12-22 5:34 Zhang, Yanmin
2006-01-05 10:30 ` Prasanna S Panchamukhi
2005-12-22 5:09 Zhang, Yanmin
2006-01-05 10:29 ` Prasanna S Panchamukhi
2005-12-21 8:31 Zhang, Yanmin
2006-01-05 10:28 ` Prasanna S Panchamukhi
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