Changes between Initial Version and Version 5 of Ticket #103


Ignore:
Timestamp:
Aug 27, 2006, 4:20:23 PM (19 years ago)
Author:
bird
Comment:

Legend:

Unmodified
Added
Removed
Modified

  • Ticket #103

    • Property Keywords dlclose DosFreeModule atexit on_exit added
    • Property Severity critical → normal
    • Property Summary Exit list handlers registered from dll are not released on DosFreeModule → libc: atexit() callbacks in dlls are called after dlclose()/DosFreeModule() on the DLL
    • Property Version 0.6.1 → 0.6

  • Ticket #103 – Description

    initial v5  
    1 Scenario: a DLL register an exit list function using atexit() and the dll is loaded using DosLoadModule; when the executable calls DosFreeModule, the exit list handler is not executed nor removed from the list of callbacks.
    2 When the executable terminates, it tries to call the dll exit callback and a crash occurs since the dll code is already unloaded from memory.
    3 
    4 This doesn't happen when the dll is linked at compile time.
    5 
    6 Testcase attached.
     1Use {{{atexit()/on_exit()}}} to register a callback residing in a dynamically loaded DLL. Then unload the DLL. When {{{exit()}}} eventually is called, the application crashes because the callback code isn't there anylonger.