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Bug 1972798 - unable to find local 'filp', [man error::dwarf] dieoffset 0x1cf974 in nfs, near pc 0x231d5 in nfs_readpages fs/nfs/read.c
Summary: unable to find local 'filp', [man error::dwarf] dieoffset 0x1cf974 in nfs, ne...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: systemtap
Version: 9.0
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: beta
: ---
Assignee: Frank Ch. Eigler
QA Contact: Martin Cermak
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-06-16 16:11 UTC by Martin Cermak
Modified: 2022-05-17 13:36 UTC (History)
3 users (show)

Fixed In Version: systemtap-4.6-3.el9
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-05-17 13:27:54 UTC
Type: Bug
Target Upstream Version:
Embargoed:
pm-rhel: mirror+

Attachments (Terms of Use)


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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2022:2514 0 None None None 2022-05-17 13:28:04 UTC

Description Martin Cermak 2021-06-16 16:11:41 UTC 
This is probably just a low prio kernel porting business.  Please, consider fixing:

9.0 Server x86_64 # cat readpages.stp
probe nfs.aop.readpages {
        log(name);
        printf("dev=%d\n", dev);
        printf("ino=%d\n", ino);
        printf("nr_pages=%d\n", nr_pages);
        printf("file=%d\n", file);
        printf("rpages=%d\n", rpages);
        printf("rsize=%d\n", rsize);
        printf("argstr=%s\n", argstr);
        printf("size=%d\n", size);
        printf("units=%s\n", units);
}

probe nfs.aop.readpages.return {
        log(name);
        printf("retstr=%s\n", retstr);
        printf("size=%d\n", size);
        printf("units=%s\n", units);
}
9.0 Server x86_64 #
9.0 Server x86_64 #
9.0 Server x86_64 # stap -P -vp4 readpages.stp
Pass 1: parsed user script and 482 library scripts using 106992virt/87820res/12180shr/75484data kb, in 300usr/100sys/396real ms.
semantic error: unable to find local 'filp', [man error::dwarf] dieoffset 0x1cf974 in nfs, near pc 0x231d5 in nfs_readpages fs/nfs/read.c (alternatives: $file, $ret, $desc, $inode, $mapping)): identifier '$filp' at /usr/share/systemtap/tapset/linux/nfs.stp:982:16
        source:         file = $filp
                               ^

semantic error: unable to find local 'filp', [man error::dwarf] dieoffset 0x1cf974 in nfs, near pc 0x231d5 in nfs_readpages fs/nfs/read.c (alternatives: $file, $ret, $desc, $inode, $mapping)): identifier '$filp' at :982:16
        source:         file = $filp
                               ^

Pass 2: analyzed script: 2 probes, 15 functions, 2 embeds, 0 globals using 294596virt/277656res/14256shr/263088data kb, in 3370usr/470sys/3893real ms.
Pass 2: analysis failed.  [man error::pass2]
9.0 Server x86_64 # 
9.0 Server x86_64 # rpm -q systemtap; uname -r
systemtap-4.5-2.el9.x86_64
5.13.0-0.rc4.33.el9.x86_64
9.0 Server x86_64 #
Comment 1 Martin Cermak 2021-11-29 16:15:10 UTC 
Could kernel commit 49dee70052b89498cc0fc61e0e193cefeee40989 substantiate the following potential fix?

$ git diff
diff --git a/tapset/linux/nfs.stp b/tapset/linux/nfs.stp
index 28f0b90ed..232289e3b 100644
--- a/tapset/linux/nfs.stp
+++ b/tapset/linux/nfs.stp
@@ -979,7 +979,7 @@ probe nfs.aop.readpages = kernel.function ("nfs_readpages") !,
         ino = $mapping->host->i_ino
 
         nr_pages = $nr_pages
-        file = $filp
+        file = @choose_defined($filp, $file)
 
         rpages = __nfs_rpages($mapping->host)
         rsize  = __nfs_server_rsize($mapping->host)
$
Comment 2 Frank Ch. Eigler 2021-11-29 16:52:05 UTC 
That fix lgtm.
Comment 3 Martin Cermak 2021-12-01 13:07:06 UTC 
Commit 2c11a115bdbe41a7f064ccd32b41c76c5b7c516d
Comment 10 errata-xmlrpc 2022-05-17 13:27:54 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (new packages: systemtap), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:2514
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