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[Ulrich Weigand <1365664@xxxxxxxxxxxxxxxxxx>]

Anton Blanchard wrote:

>I wonder if the gdb complaint about the kernel VDSO is causing the test to fail. The warning is almost certainly a result of
>this kernel patch:
>
>    powerpc: Use unstripped VDSO image for more accurate profiling data

Whether or not this complaint is causing that test to fail, it should be
fixed.

Using an unstripped VDSO image is certainly better than a stripped one,
also for debugging purposes.  However, it needs to be correct (and
complete) -- maybe the VDSO is indeed truncated?   Including full debug
data, the VDSO may be longer than a page, does the kernel actually map
all of it to user space?

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https://bugs.launchpad.net/bugs/1365664

Title:
  gdb source test suites are failing in Ubuntu14.10

Status in “gdb” package in Ubuntu:
  Confirmed

Bug description:
  ---Problem Description---
  gdb source test suites are failing in Ubuntu14.10
   
  Machine Type = P8 
   
  ---Steps to Reproduce---
  Install a P8 system with Power KVM and then install Ubuntu 14.10 guest.
  Then try to build and execute the gdb source test suites as below.

  root@ubuntu:~# apt-get source gdb
  root@ubuntu:~# cd gdb-7.8/
  root@ubuntu:~/gdb-7.8# dpkg-buildpackage -b 2>&1 | tee gdblog

                  === gdb Summary ===

  # of expected passes            25009
  # of unexpected failures        287
  # of unexpected successes       2
  # of expected failures          66
  # of unknown successes          1
  # of known failures             59
  # of unresolved testcases       3
  # of untested testcases         19
  # of unsupported tests          100

   
  ---uname output---
  Linux ubuntu 3.16.0-11-generic #16-Ubuntu SMP Mon Aug 25 20:02:00 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  I've retested gdb from Ubuntu 14.04 (gdb-7.7-0ubuntu3.1) in the Ubuntu 14.10 VM provided by Pavaman and the number of failures curiously increased to 250 (in comparison to less than 140 on 14.04), which leads me to believe that there is something in the environment of Ubuntu 14.10 compromising gdb functionality in several testcases.

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