[Bug tapsets/4519] New: nfs.stp nfs.aop.readpage uses field "index" which isn't available in linux 2.6.22-rc1

[Bug tapsets/4519] New: nfs.stp nfs.aop.readpage uses field "index" which isn't available in linux 2.6.22-rc1

[wcohen at redhat dot com]

In newer version of the kernel 2.6.22-rc1 the "struct page" doesn't have the
index field. This is triggered by the lket test. However, the following one
liner will also demontrate the problem:

stap -v -e '  probe nfs.aop.readpage { printf("%d\n", page_index) }'

Output from testsuite:

Running
/home/wcohen/stap_snap_200705162206/src/testsuite/systemtap.samples/lket.exp ...
Pass 1: parsed user script and 53 library script(s) in 1932usr/4sys/1948real ms.

semantic error: field 'index' not found (alternatives: flags _count <anonymous>
<anonymous> <anonymous> lru): identifier '$page' at
/home/wcohen/stap_snap_200705162206/install/share/systemtap/tapset/nfs.stp:842:22

-- 
           Summary: nfs.stp   nfs.aop.readpage uses field "index" which
                    isn't available in linux 2.6.22-rc1
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: tapsets
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: wcohen at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=4519

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[Bug tapsets/4519] nfs.stp nfs.aop.readpage uses field "index" which isn't available in linux 2.6.22-rc1

[wenji dot huang at oracle dot com]

------- Additional Comments From wenji dot huang at oracle dot com  2007-09-06 02:57 -------
(In reply to comment #0)
> In newer version of the kernel 2.6.22-rc1 the "struct page" doesn't have the
> index field. This is triggered by the lket test. However, the following one
> liner will also demontrate the problem:
> 
> stap -v -e '  probe nfs.aop.readpage { printf("%d\n", page_index) }'
> 
> Output from testsuite:
> 
> Running
> /home/wcohen/stap_snap_200705162206/src/testsuite/systemtap.samples/lket.exp ...
> Pass 1: parsed user script and 53 library script(s) in 1932usr/4sys/1948real ms.
> 
> semantic error: field 'index' not found (alternatives: flags _count <anonymous>
> <anonymous> <anonymous> lru): identifier '$page' at
> /home/wcohen/stap_snap_200705162206/install/share/systemtap/tapset/nfs.stp:842:22

index is packed into anonymous union in struct page since 2.6.22. And the name
attribute is missing in dwarf2. So the semantic error is thrown in elaborate phrase.
 
So maybe construct a pure function to access index member. 



-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|nfs.stp   nfs.aop.readpage  |nfs.stp   nfs.aop.readpage
                   |uses field "index" which    |uses field "index" which
                   |isn't available in linux    |isn't available in linux
                   |2.6.22-rc1                  |2.6.22-rc1


http://sourceware.org/bugzilla/show_bug.cgi?id=4519

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[Bug translator/4519] support fields in anonymous unions

[fche at redhat dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|tapsets                     |translator
            Summary|nfs.stp   nfs.aop.readpage  |support fields in anonymous
                   |uses field "index" which    |unions
                   |isn't available in linux    |
                   |2.6.22-rc1                  |


http://sourceware.org/bugzilla/show_bug.cgi?id=4519

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[Bug translator/4519] support fields in anonymous unions

[prerna at linux dot vnet dot ibm dot com]

------- Additional Comments From prerna at linux dot vnet dot ibm dot com  2008-09-19 06:55 -------


*** This bug has been marked as a duplicate of 3016 ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |DUPLICATE


http://sourceware.org/bugzilla/show_bug.cgi?id=4519

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