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;
+    }
+}

test/throwcatch-lib.h

@@ -0,0 +1,51 @@
+/*
+ * 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.
+ */
+
+#ifndef THROWCATCH_LIB_H
+#define THROWCATCH_LIB_H
+
+#include <exception>
+#include <string>
+
+class FirstException : public std::exception {
+public:
+    FirstException(const char *s) : str(s) {}
+
+    const char *what() const noexcept override {
+        return str.c_str();
+    }
+
+private:
+    std::string str;
+};
+
+class SecondException : public std::exception {
+public:
+    SecondException(const char *s) : str(s) {}
+
+    const char *what() const noexcept override {
+        return str.c_str();
+    }
+
+private:
+    std::string str;
+};
+
+void libFunc(int param);
+
+#endif

test/throwcatch-main.cpp

@@ -0,0 +1,60 @@
+/*
+ * 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 <string.h>
+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+    int ret = 0;
+    for (int i = 0; i <= 3; i++) {
+        int caught = 0;
+        try {
+            libFunc(i);
+        } catch (FirstException &e) {
+            fprintf(stderr, "caught FirstException\n");
+            caught = 1;
+            if (strcmp(e.what(), "first")) {
+                fprintf(stderr, "unexpected what()\n");
+                ret = 1;
+            }
+        } catch (SecondException &e) {
+            fprintf(stderr, "caught SecondException\n");
+            caught = 2;
+            if (strcmp(e.what(), "second")) {
+                fprintf(stderr, "unexpected what()\n");
+                ret = 1;
+            }
+        } catch (std::exception &e) {
+            fprintf(stderr, "caught std::exception\n");
+            caught = 3;
+        } catch (...) {
+            fprintf(stderr, "caught something else\n");
+            caught = -1;
+        }
+        if (caught != i) {
+            fprintf(stderr, "caught unexpected exception!\n");
+            ret = 1;
+        }
+    }
+    if (ret)
+        fprintf(stderr, "got errors\n");
+    else
+        fprintf(stderr, "all ok\n");
+    return ret;
+}