newlib-cygwin/winsup/mingw/samples/seh/sehsub.c

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2002-05-28 21:13:45 +08:00
/*
* sehsub.c
*
* In an attempt to see what might be going on inside CRTDLL, this program
* walks the exception list after creating a new thread with _beginthread.
*
* It turns out that _beginthread DOES install an exception handler, as
* expected, but this handler is NOT exported by CRTDLL (it is certainly
* not _except_handler2 or _XcptFilter)... an odd and unpleasant turn of
* events.
*/
#include <windows.h>
#include <excpt.h>
#include <process.h>
#include "exutil.h"
extern void* __imp__except_handler3;
unsigned
my_thread (void * p)
{
printf ("In my thread.\n");
WalkExceptionHandlers();
return 0;
}
main ()
{
unsigned long h;
unsigned id;
printf ("In main.\n");
WalkExceptionHandlers();
printf ("Except_handler3 %08x\n", __imp__except_handler3);
h = _beginthreadex (NULL, 0, my_thread, NULL, 0, &id);
WaitForSingleObject ((HANDLE) h, INFINITE);
CloseHandle ((HANDLE) h);
return;
}