Re: [libunwind] Signal handlers and unw_resume

[David Mosberger]

>>>>> On Tue, 24 Aug 2004 08:39:36 -0500 (CDT), Archie Cobbs <address@hidden> 
>>>>> said:

  Archie> Thomas Hallgren wrote:
  >> > If by "OS" you mean "kernel", then there is no issue: the unw_resume()
  >> > will be sufficient.

  >> Great! Then there's no issue.

  Archie> The only issue I can think of is with restoring the signal mask,
  Archie> e.g., like siglongjmp() does. If you only sigjmp() out of a signal
  Archie> handler, the signal remains blocked.

Not with unw_resume(3).  To quote from the man-page:

 if execution in any of the stack frames younger (more deeply nested)
 than the one identified by cp was interrupted by a signal, then
 unw_resume() will restore all registers as well as the signal mask.

        --david