Re: [tor-bugs] #13443 [Tor Browser]: TB v4.0 crashes on Windows

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#13443: TB v4.0 crashes on Windows
-------------------------+-------------------------------------------------
     Reporter:           |      Owner:  tbb-team
  cypherpunks            |     Status:  new
         Type:  defect   |  Milestone:
     Priority:           |    Version:
  critical               |   Keywords:  tbb-crash, tbb-helpdesk-frequent,
    Component:  Tor      |  TorBrowserTeam201410
  Browser                |  Parent ID:
   Resolution:           |
Actual Points:           |
       Points:           |
-------------------------+-------------------------------------------------

Comment (by cypherpunks):

 {{{
 Exception Code: 80000003
 }}}

 It's exception on INT3 (0xCC op code) if no debugger attached.

 > Debug.TXT
 {{{
 FAULTING_IP:
 xul!DumpCompleteHeap+460489
 }}}

 It's not `DumpCompleteHeap`, offset inside function is too large and
 nothing calls it without debugger.

 {{{
 Exception Offset:       0105d1e4
 }}}

 It's code which used as [https://mxr.mozilla.org/mozilla-
 esr31/source/media/webrtc/trunk/webrtc/modules/video_capture/windows/BaseFilter.cpp#35
 EnumPins class], for [https://mxr.mozilla.org/mozilla-
 esr31/source/content/media/directshow/DirectShowUtils.cpp#279 DirectShow].

 In case of [https://mxr.mozilla.org/mozilla-
 esr31/source/content/media/directshow/moz.build#30 disabled WebRTC] no
 valid code generated at fault offset, only looking like real code junk
 generated.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13443#comment:26>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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