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From: "tim.moloney at mrsl dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/60731] New: dynamic library not getting reinitialized on multiple calls to dlopen()
Date: Tue, 01 Apr 2014 17:01:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60731

            Bug ID: 60731
           Summary: dynamic library not getting reinitialized on multiple
                    calls to dlopen()
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tim.moloney at mrsl dot com

Created attachment 32518
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32518&action=edit
Example showing failure to initialize a dynamic library after multiple calls to
dlopen().

If a dynamic library is loaded multiple times via dlopen(), subsequent loads do
not correctly initialize static variables under the following conditions:
1) A class/struct with a constructor
2) with an inlined function
3) containing a static variable.
Please run the attached example.
  # tar xf gcc_static_issue.tgz
  # cd gcc_static_issue
  # make
  # ./test_static
  Expected behavior (as on RHEL5, g++ 4.1.2):
  Type 'q' to exit or enter to reload/run the DLL
  count:1

  count:1

  count:1

  count:1

  count:1
  q
  #
Actual behavior (as on RHEL6 and RHEL7beta, g++ 4.4.7 and 4.8.2, respectively):
  Type 'q' to exit or enter to reload/run the DLL
  count:1

  count:2

  count:3

  count:4

  count:5
  q
  #