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From:	"Dave Korn" <dave DOT korn AT artimi DOT com>
To:	<cygwin AT cygwin DOT com>
Subject:	strace -vs- cygload funny
Date:	Tue, 25 Jul 2006 18:47:20 +0100
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  So, how come strace works properly?

  According to how-cygtls, 

"  If you load cygwin1.dll dynamically from a non-cygwin application, it is
  vital that the bottom CYGTLS_PADSIZE bytes of the stack are not in use
  before you call cygwin_dll_init().  See winsup/testsuite/cygload for 
  more information.  "

  What that doesn't make clear is whether calling cygwin_dll_init is
compulsory, or optional.  What strace.cc does is to LoadLibrary the cygwin
dll, without making any provision for padding on the stack.  But it never
calls cygwin_dll_init - at least, not explicitly.  It does, however, call
cygwin_internal for CW_CYGWIN_PID_TO_WINPID, CW_STRACE_TOGGLE, and CW_ARGV.

  Is this OK?

    cheers,
      DaveK
-- 
Can't think of a witty .sigline today....


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