1 files changed, 43 insertions, 0 deletions
diff --git a/winsup/mingw/samples/seh/sehsub.c b/winsup/mingw/samples/seh/sehsub.c
new file mode 100644
index 000000000..d2442850a
--- /dev/null
+++ b/winsup/mingw/samples/seh/sehsub.c
@@ -0,0 +1,43 @@
+/*
+ * 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;
+}
+