[Bug translator/6950] New: buildok/twentyfive.stp fails with elfutils 0.137

[Bug translator/6950] New: buildok/twentyfive.stp fails with elfutils 0.137

[mjw at redhat dot com]

On 2.6.18-92.1.1.el5 (x86) and 2.6.18-92.1.13.el5 (x86_64) kernels, but not on
2.6.26.5-45.fc9.x86_64, buildok/twentyfive.stp fails with elfutils 0.137 plus
the two recommended patches (elfutils-0.137-fixes.patch from the
elfutils-0.137-2.fc9.src.rpm and elfutils-0.137-segment-fix.patch from bug
#6928) as follows:

stap -p4 /home/mark/src/systemtap/testsuite/buildok/twentyfive.stp
semantic error: libdwfl failure (dwfl_getmodules): no error while resolving prob
e point module("ext3").function("ext3_check_dir_entry")?

This passes with elfutils-0.135.

The 'no error' comes from dwfl_getmodules() given a positive offset to continue,
after which it returns -1, but doesn't set dwfl_errno.

-- 
           Summary: buildok/twentyfive.stp fails with elfutils 0.137
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: mjw at redhat dot com
                CC: roland at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=6950

------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

[Bug translator/6950] buildok/twentyfive.stp fails with elfutils 0.137

[mjw at redhat dot com]

------- Additional Comments From mjw at redhat dot com  2008-10-29 16:45 -------
Need to come up with a simpler testcase. Can try to reproduce with a simple
iteration case, e.g. elfutils dwflmodtest or eu-unstrip -n.  with -K<version>
you can check the problem kernels (offline mode).

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6950

------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

[Bug translator/6950] buildok/twentyfive.stp fails with elfutils 0.137

[risrajak at linux dot vnet dot ibm dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |risrajak at linux dot vnet
                   |                            |dot ibm dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=6950

------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

[Bug translator/6950] buildok/twentyfive.stp fails with elfutils 0.137

[mjw at redhat dot com]

------- Additional Comments From mjw at redhat dot com  2008-11-12 16:27 -------
No obvious anomalies were found with either dwflmodtest or eu-unstrip.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6950

------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

[Bug translator/6950] buildok/twentyfive.stp fails with elfutils 0.137

[mjw at redhat dot com]

------- Additional Comments From mjw at redhat dot com  2008-11-12 20:40 -------
Oneline reproducer:

$ stap -e 'probe module("ext3").function("ext3_check_dir_entry")
{print($ext3_filetype_table)}'

semantic error: libdwfl failure (dwfl_getmodules): no error while resolving
probe point module("ext3").function("ext3_check_dir_entry")
Pass 2: analysis failed.  Try again with more '-v' (verbose) options.

Adding some stap -vvv will give (at the end):
[...]
focused on module 'ext3 = [0x559f200-0x55c2051, bias 0x0] file
/usr/lib/debug/lib/modules/2.6.18-92.1.13.el5/kernel/fs/ext3/ext3.ko.debug ELF
machine x86_64 (code 62)
focused on module 'ext3'
selected function ext3_check_dir_entry
probe ext3_check_dir_entry@fs/ext3/dir.c:68 module=ext3 reloc=.text
section=.text pc=0x55a0b7c
finding location for local 'ext3_filetype_table' near address 55a0b7c, module bias 0
semantic error: libdwfl failure (dwfl_getmodules): no error while resolving
probe point module("ext3").function("ext3_check_dir_entry")

The ext3_filetype_table is defined in the same file (fs/ext3/dir.c) as the
function being probed as:

static unsigned char ext3_filetype_table[] = {
        DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
};

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6950

------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

[Bug translator/6950] buildok/twentyfive.stp fails with elfutils 0.137

[mjw at redhat dot com]

------- Additional Comments From mjw at redhat dot com  2008-11-14 10:11 -------
This seems fixed in elfutils-0.137-3.fc9.x86_64 (against systemtap git trunk
588b83de, 2.6.26.6-79.fc9.x86_64).

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6950

------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

[Bug translator/6950] buildok/twentyfive.stp fails with elfutils 0.137

[mjw at redhat dot com]

------- Additional Comments From mjw at redhat dot com  2008-11-14 10:28 -------
Created an attachment (id=3064)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=3064&action=view)
Fedora 9 srpm elfutils-0.137-fixes.patch


-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6950

------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

[Bug translator/6950] buildok/twentyfive.stp fails with elfutils 0.137

[mjw at redhat dot com]

------- Additional Comments From mjw at redhat dot com  2008-11-14 10:44 -------
The fix might not have been the elfutils update, but something else. It still
fails on kernel-2.6.18-123.el5.x86_64 with the same systemtap and elfutils
versions as in comment #4.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6950

------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

[Bug translator/6950] buildok/twentyfive.stp fails with elfutils 0.137

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2008-11-26 21:34 -------
Problem still occurs with f9:
Linux super.elastic.org 2.6.27.5-41.fc9.x86_64.debug #1 SMP Thu Nov 13 20:05:34
EST 2008 x86_64 x86_64 x86_64 GNU/Linux

[14:46:47] % grep ext3_check_dir /proc/kallsyms 
ffffffffa00329fc t ext3_check_dir_entry [ext3]

./stap -V
SystemTap translator/driver (version 0.8/0.137 git branch master, commit 8d59b39f)

(from systemtap.log)
spawn1 stap -p4
/home/fche/Private/DEVEL/DEVEL-systemtap/git/systemtap2/testsuite/buildok/twentyfive.stp
semantic error: libdwfl failure (dwfl_getmodules): no error while resolving
probe point module("ext3").function("ext3_check_dir_entry")?
Pass 2: analysis failed.  Try again with more '-v' (verbose) options.


-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6950

------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

[Bug translator/6950] buildok/twentyfive.stp fails with elfutils 0.137

[roland at gnu dot org]

------- Additional Comments From roland at gnu dot org  2008-11-26 23:37 -------
Try http://koji.fedoraproject.org/scratch/roland/task_953821/ and see if it
works woth those elfutils-libs

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6950

------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

[Bug translator/6950] buildok/twentyfive.stp fails with elfutils 0.137

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2008-11-27 01:19 -------
(In reply to comment #8)
> Try http://koji.fedoraproject.org/scratch/roland/task_953821/ and see if it
> works woth those elfutils-libs

Sure does (on f9 x86-64), thanks!



-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|systemtap at sources dot    |roland at redhat dot com
                   |redhat dot com              |
             Status|NEW                         |ASSIGNED


http://sourceware.org/bugzilla/show_bug.cgi?id=6950

------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

[Bug translator/6950] buildok/twentyfive.stp fails with elfutils 0.137

[roland at gnu dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=6950

Roland McGrath <roland at gnu dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|roland at redhat dot com    |
         AssignedTo|roland at redhat dot com    |systemtap at sourceware dot
                   |                            |org

-- 
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.