From bf23ebf03ccd0affa1cdc772d4d98ea5c71ccdb9 Mon Sep 17 00:00:00 2001
From: Joachim Bauch <mail@joachim-bauch.de>
Date: Sun, 24 Feb 2019 14:42:48 +0100
Subject: [PATCH] Add testcase for exception handling code.

---
 tests/CMakeLists.txt      |  2 ++
 tests/LoadDll.cpp         | 72 +++++++++++++++++++++++++++++++++++++++
 tests/Makefile            |  2 +-
 tests/generate-exports.sh |  6 ++++
 4 files changed, 81 insertions(+), 1 deletion(-)

diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 8b1007f..e968369 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -5,6 +5,8 @@ set (sources_testsuite
 if (NOT MSVC)
     set (CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "-static")
     set (CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "-static")
+else ()
+    set (CMAKE_CXX_FLAGS "/EHsc")
 endif ()
 
 add_executable (TestSuite ${sources_testsuite})
diff --git a/tests/LoadDll.cpp b/tests/LoadDll.cpp
index 8cb215b..15e9f93 100644
--- a/tests/LoadDll.cpp
+++ b/tests/LoadDll.cpp
@@ -13,6 +13,9 @@
 
 typedef int (*addProc)(int);
 typedef int (*addNumberProc)(int, int);
+#ifdef _WIN64
+typedef void (*throwExceptionProc)(void);
+#endif
 
 // Thanks to Tim Cooper (from http://stackoverflow.com/a/8584708)
 const char *sstrstr(const char *haystack, const char *needle, size_t length) {
@@ -283,6 +286,70 @@ exit:
     return result;
 }
 
+#ifdef _WIN64
+BOOL LoadExceptionsFromMemory(char *filename)
+{
+    FILE *fp;
+    unsigned char *data=NULL;
+    long size;
+    size_t read;
+    HMEMORYMODULE handle = NULL;
+    throwExceptionProc throwException;
+    BOOL result = TRUE;
+
+    fp = fopen(filename, "rb");
+    if (fp == NULL)
+    {
+        printf("Can't open DLL file \"%s\".", filename);
+        result = FALSE;
+        goto exit;
+    }
+
+    fseek(fp, 0, SEEK_END);
+    size = ftell(fp);
+    assert(size > 0);
+    data = (unsigned char *)malloc(size);
+    assert(data != NULL);
+    fseek(fp, 0, SEEK_SET);
+    read = fread(data, 1, size, fp);
+    assert(read == static_cast<size_t>(size));
+    fclose(fp);
+
+    handle = MemoryLoadLibrary(data, size);
+    if (handle == NULL)
+    {
+        _tprintf(_T("Can't load library from memory.\n"));
+        result = FALSE;
+        goto exit;
+    }
+
+    throwException = (throwExceptionProc)MemoryGetProcAddress(handle, "throwException");
+    if (!throwException) {
+        _tprintf(_T("MemoryGetProcAddress(\"throwException\") returned NULL\n"));
+        result = FALSE;
+        goto exit;
+    }
+
+    try {
+        throwException();
+        _tprintf(_T("Should have caught exception.\n"));
+        result = FALSE;
+        goto exit;
+    } catch (int e) {
+        if (e != 42) {
+            _tprintf(_T("Should have caught exception 42, got %d instead\n"), e);
+            result = FALSE;
+            goto exit;
+        }
+    }
+
+exit:
+    MemoryFreeLibrary(handle);
+    free(data);
+    return result;
+}
+#endif
+
 int main(int argc, char* argv[])
 {
     if (argc < 2) {
@@ -298,6 +365,11 @@ int main(int argc, char* argv[])
         if (!LoadExportsFromMemory(argv[1])) {
             return 2;
         }
+#ifdef _WIN64
+        if (!LoadExceptionsFromMemory(argv[1])) {
+            return 2;
+        }
+#endif
     }
 
     return 0;
diff --git a/tests/Makefile b/tests/Makefile
index 028bcad..532a1b7 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -74,7 +74,7 @@ test-relocate.dll: $(DLL_OBJ)
 	$(CXX) $(LDFLAGS_DLL) $(LDFLAGS) -Wl,--image-base -Wl,0x20000000 -o $@ $(DLL_OBJ)
 
 test-exports.dll: SampleExports.o
-	$(CXX) $(LDFLAGS_DLL) $(LDFLAGS) -o $@ SampleExports.o
+	$(CXX) $(LDFLAGS_DLL) $(LDFLAGS) -static -lstdc++ -dynamic -o $@ SampleExports.o
 
 SampleExports.cpp: generate-exports.sh
 	./generate-exports.sh
diff --git a/tests/generate-exports.sh b/tests/generate-exports.sh
index 974b2a6..ece6d45 100755
--- a/tests/generate-exports.sh
+++ b/tests/generate-exports.sh
@@ -48,5 +48,11 @@ EOF
 done
 
 cat >> SampleExports.cpp << EOF
+#ifdef _WIN64
+SAMPLEDLL_API void throwException(void)
+{
+    throw 42;
+}
+#endif
 }
 EOF