touch-packages team mailing list archive

[Tim Penhey <tim.penhey@xxxxxxxxxxxxx>]

Gah, must have looked at the page size of my laptop instead:

ubuntu@rockne-02:~$ juju status
environment: local
machines:
  "0":
    agent-state: down
    agent-state-info: (started)
    agent-version: 1.18.4.1
    dns-name: localhost
    instance-id: localhost
    series: trusty
services: {}
ubuntu@rockne-02:~$ uname -a
Linux rockne-02 3.13.0-18-generic #38-Ubuntu SMP Mon Mar 17 21:41:16 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
ubuntu@rockne-02:~$ getconf PAGESIZE
65536


** Tags added: verification-done

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to gccgo-4.9 in Ubuntu.
https://bugs.launchpad.net/bugs/1304754

Title:
  gccgo has issues when page size is not 4kB

Status in The GNU Compiler Collection:
  Fix Released
Status in “gcc-4.9” package in Ubuntu:
  Fix Released
Status in “gccgo-4.9” package in Ubuntu:
  Invalid
Status in “gcc-4.9” source package in Trusty:
  Invalid
Status in “gccgo-4.9” source package in Trusty:
  In Progress
Status in “gcc-4.9” source package in Utopic:
  Fix Released
Status in “gccgo-4.9” source package in Utopic:
  Invalid

Bug description:
  On kernels 3.13-18 and 3.13-23 (there may be others) the kernel is
  killing gccgo compiled binaries

  [18519.444748] jujud[19277]: bad frame in setup_rt_frame:
  0000000000000000 nip 0000000000000000 lr 0000000000000000
  [18519.673632] init: juju-agent-ubuntu-local main process (19220)
  killed by SEGV signal
  [18519.673651] init: juju-agent-ubuntu-local main process ended, respawning

  In powerpc/kernel/signal_64.c:

  sys_rt_sigreturn is jumping to the badframe: label and executing an
  unconditional force_sigsegv which is delivered to the userland
  process. Like C++, gccgo tries to decode SIGSEGV as a nil pointer
  access and blame some random function that happened to be the top
  stack frame.

  Reverting to the 3.13-08 kernel appears to resolve the issue which
  (weakly) points the finger at the recent switch to 64k pages.

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