[tbb-bugs] #13443 [Tor Browser]: TB v4.0 (xul.dll) crashes on Windows

Tor Bug Tracker & Wiki blackhole at torproject.org
Sun Oct 26 09:00:22 UTC 2014

#13443: TB v4.0 (xul.dll) 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):

 DirectShow's classes using [https://mxr.mozilla.org/mozilla-
 Component Object Model (COM)], which hardly depends on exception handling:
 inline void _com_issue_error(HRESULT hr) throw(_com_error) {
     throw _com_error(hr);
     /* This is designed to use exceptions. If exceptions are disabled,
 there is not much we can do here. */
 Firefox can't handle exceptions if built using GCC (Linux or MinGW, -fno-
 exceptions used). MSVC using cheap SEH so can handle exceptions. Not every
 exception code is fatal, but if no exception handling enabled then every
 error leads to program termination. MinGW version of _com_issue_error
 makes it clear by generating interrupt #3.

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13443#comment:42>
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