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  1. Harmony
  2. HARMONY-5390

[drlvm][signals] incorrect processing SIGINT and SIGQUIT signals

    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: DRLVM
    • Labels:
      None
    • Estimated Complexity:
      Moderate

      Description

      Signal handler incorrect processing SIGINT and SIGQUIT signals. To process these signals signal handler calls vm_interrupt_handler() and vm_dump_handler() function simultaneously. Execution of these function has several limitations:
      1. These functions try to grab hythread_global_lock() to create new hythreads. Lock point in signal handler can lead to dead lock.
      2. Grabbing hythread_global_lock() requires hythread_suspend_enable() state of the current thread. Signal handler can be executed on native unattached thread. That leads to crash during accessing to hythread data.
      3. vm_interrupt_handler() function executes exit() function which executes C++ destructors. Destructor execution in unknown point could lead to crash or dead lock (for instance interruption with kernel resources).
      4. vm_dump_handler() function should don't break context during dumping threads information.

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              • Assignee:
                Unassigned
                Reporter:
                starcon Pavel Rebriy
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                Dates

                • Created:
                  Updated: