[Bug dynamic-link/30619] New: Support dlopen after multi-threaded fork in more cases

[Bug dynamic-link/30619] New: Support dlopen after multi-threaded fork in more cases

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30619

            Bug ID: 30619
           Summary: Support dlopen after multi-threaded fork in more cases
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: dynamic-link
          Assignee: unassigned at sourceware dot org
          Reporter: fweimer at redhat dot com
  Target Milestone: ---

The dlopen function is used internally in various places (backtrace, iconv,
pthread_exit, NSS). It would be preferable if it worked after a multi-threaded
fork.

Right now, we get various hangs, or an assertion failure:

Inconsistency detected by ld.so: dl-open.c: 583: dl_open_worker_begin:
Assertion `r_state == RT_CONSISTENT' failed!

Bug 24941 is an example of a surprising use of NSS. There might be others.

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[Bug dynamic-link/30619] Support dlopen after multi-threaded fork in more cases

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30619

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fweimer at redhat dot com

--- Comment #1 from Florian Weimer <fweimer at redhat dot com> ---
Created attachment 14955
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14955&action=edit
Patch with test case

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