[Bug 1647864] Re: google-perftools can deadlock with dlopen on startup

[Launchpad Bug Tracker]

This bug was fixed in the package google-perftools -
2.4-0ubuntu5.16.10.1

---------------
google-perftools (2.4-0ubuntu5.16.10.1) yakkety; urgency=medium

  * d/p/Use-initial-exec-tls-for-libunwind-s-recursion-flag.patch:
    Use initial-exec tls for libunwind's recursion flag avoiding
    deadlock in dlopen on startup (LP: #1647864).

 -- James Page <james.page at ubuntu.com>  Tue, 02 May 2017 05:36:48 -0400

** Changed in: google-perftools (Ubuntu Yakkety)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1647864

Title:
  google-perftools can deadlock with dlopen on startup

Status in google-perftools package in Ubuntu:
  Fix Released
Status in google-perftools source package in Xenial:
  Fix Released
Status in google-perftools source package in Yakkety:
  Fix Released

Bug description:
  [Impact]
  Applications use tcmalloc and deadlock on startup (specifically impacting upstream testing of Ceph).

  [Test Case]
  Hard to reproduce reliably, so we'll perform a regression test with Ceph in Ubuntu and look for feedback from upstream on occurrance of this problem.

  [Regression Potential]
  Low; patch is already in use in CentOS and RHEL and has been accepted into upstream.

  [Original Bug Report]
  On the xenial version of libgoogle-perftools, tcmalloc can deadlock with dlopen on startup.  This was fixed upstream here:

   https://github.com/gperftools/gperftools/issues/786

  FWIW el7 also backported this fix to 2.4 to resolve this for us.

  The ceph bug tracking this issue is here:

   http://tracker.ceph.com/issues/13522

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