1 files changed, 84 insertions, 0 deletions
diff --git a/pyuno/source/module/pyuno_dlopenwrapper.c b/pyuno/source/module/pyuno_dlopenwrapper.c
new file mode 100644
index 000000000..78e6982e8
--- /dev/null
+++ b/pyuno/source/module/pyuno_dlopenwrapper.c
@@ -0,0 +1,84 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+/* make Python.h go first as a hack to work around _POSIX_C_SOURCE redefinition
+   warnings: */
+#include <Python.h>
+
+#include <sal/config.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+#if defined LINUX && !defined __USE_GNU
+#define __USE_GNU
+#endif
+#include <dlfcn.h>
+
+#include <rtl/string.h>
+
+/* A wrapper around libpyuno.so, making sure the latter is loaded RTLD_GLOBAL
+   so that C++ exception handling works with old GCC versions (that determine
+   RTTI identity by comparing string addresses rather than string content).
+*/
+
+static void * load(void const * address, char const * symbol) {
+    Dl_info dl_info;
+    char * slash;
+    size_t len;
+    char * libname;
+    void * h;
+    void * func;
+    if (dladdr(address, &dl_info) == 0) {
+        abort();
+    }
+    slash = strrchr(dl_info.dli_fname, '/');
+    if (slash == NULL) {
+        abort();
+    }
+    len = slash - dl_info.dli_fname + 1;
+    libname = malloc(
+        len + RTL_CONSTASCII_LENGTH(SAL_DLLPREFIX "pyuno" SAL_DLLEXTENSION)
+        + 1);
+    if (libname == NULL) {
+        abort();
+    }
+    strncpy(libname, dl_info.dli_fname, len);
+    strcpy(libname + len, SAL_DLLPREFIX "pyuno" SAL_DLLEXTENSION);
+    h = dlopen(libname, RTLD_LAZY | RTLD_GLOBAL);
+    free(libname);
+    if (h == NULL) {
+        fprintf(stderr, "failed to load pyuno: '%s'\n", dlerror());
+        abort();
+    }
+    func = dlsym(h, symbol);
+    if (func == NULL) {
+        dlclose(h);
+        abort();
+    }
+    // coverity[leaked_storage] - this is on purpose
+    return func;
+}
+
+SAL_DLLPUBLIC_EXPORT PyObject * PyInit_pyuno(void) {
+    return
+        ((PyObject * (*)(void)) load((void *) &PyInit_pyuno, "PyInit_pyuno"))();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */