test: Add a testcase for throwing/catching C++ exceptions across DLLs

test/throwcatch-lib.cpp

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2021 Martin Storsjo
+ *
+ * This file is part of llvm-mingw.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "throwcatch-lib.h"
+#include <stdio.h>
+
+void libFunc(int param) {
+    switch (param) {
+    case 1:
+        fprintf(stderr, "throwing FirstException\n");
+        fflush(stderr);
+        throw FirstException("first");
+    case 2:
+        fprintf(stderr, "throwing SecondException\n");
+        fflush(stderr);
+        throw SecondException("second");
+    case 3:
+        fprintf(stderr, "throwing std::exception\n");
+        fflush(stderr);
+        throw std::exception();
+    default:
+        fprintf(stderr, "not throwing\n");
+        break;
+    }
+}