1 files changed, 72 insertions, 0 deletions
diff --git a/winsup/mingw/samples/seh/sehtest.c b/winsup/mingw/samples/seh/sehtest.c
new file mode 100644
index 000000000..b7ac3357e
--- /dev/null
+++ b/winsup/mingw/samples/seh/sehtest.c
@@ -0,0 +1,72 @@
+/*
+ * This file tests some of the basics of structured exception handling as
+ * implemented in excpt.h and the Windows API header files.
+ *
+ * The program installs two exception handlers, then attempts to write to
+ * a pointer to an invalid address. This causes an exception which passes
+ * through the exception handlers and on to the default system exception
+ * handler. That handler brings up the dialog box all Windows users know
+ * and love, and then the program is terminated.
+ *
+ * You might note that after the initial run up through our exception frames
+ * we get a second run up through them with the exception code
+ * STATUS_INVALID_DISPOSITION and the code EH_UNWINDING. This seems normal
+ * except that the code got changed from the previous STATUS_ACCESS_VIOLATION.
+ * I don't understand that bit particularly.
+ */
+
+#include <stdio.h>
+#include <excpt.h>
+
+#include "exutil.h"
+
+EXCEPTION_DISPOSITION
+my_handler (
+	struct _EXCEPTION_RECORD* pExceptionRec,
+	void* pEstablisherFrame,
+	struct _CONTEXT* pContextRecord,
+	void* pDispatcherContext
+	)
+{
+	printf ("In my exception handler!\n");
+	DumpExceptionRecord (pExceptionRec);
+	return ExceptionContinueSearch;
+}
+
+EXCEPTION_DISPOSITION
+my_handler2 (
+	struct _EXCEPTION_RECORD* pExceptionRec,
+	void* pEstablisherFrame,
+	struct _CONTEXT* pContextRecord,
+	void* pDispatcherContext
+	)
+{
+	printf ("In top exception handler!\n");
+	DumpExceptionRecord (pExceptionRec);
+	return ExceptionContinueSearch;
+}
+
+main ()
+{
+	char*	x;
+
+	printf ("my_handler2 = %08x\n", my_handler2);
+	printf ("my_handler = %08x\n", my_handler);
+
+	WalkExceptionHandlers();
+
+	__try1(my_handler2)
+	x = (char*) 10;
+
+	WalkExceptionHandlers();
+
+	__try1(my_handler)
+
+	WalkExceptionHandlers();
+
+	*x = 1;
+	__except1
+	__except1
+	printf ("Finished!\n");
+}
+