1 files changed, 295 insertions, 0 deletions
diff --git a/sal/osl/unx/module.cxx b/sal/osl/unx/module.cxx
new file mode 100644
index 0000000000..0da54f4758
--- /dev/null
+++ b/sal/osl/unx/module.cxx
@@ -0,0 +1,295 @@
+/* -*- 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 .
+ */
+
+#include <sal/config.h>
+
+#include <sal/log.hxx>
+#include <sal/types.h>
+#include <osl/module.h>
+#include <osl/thread.h>
+#include <osl/file.h>
+#include <rtl/string.hxx>
+#include <rtl/ustring.hxx>
+#include <assert.h>
+#include <dlfcn.h>
+#include <limits.h>
+#include "file_url.hxx"
+
+static bool getModulePathFromAddress(void * address, rtl_String ** path)
+{
+    bool result = false;
+#if HAVE_UNIX_DLAPI
+    Dl_info dl_info;
+
+    result = dladdr(address, &dl_info) != 0;
+
+    if (result)
+    {
+        rtl_string_newFromStr(path, dl_info.dli_fname);
+    }
+#else
+    (void) address;
+    (void) path;
+#endif
+    return result;
+}
+
+#ifndef DISABLE_DYNLOADING
+
+/*****************************************************************************/
+/* osl_loadModule */
+/*****************************************************************************/
+
+oslModule SAL_CALL osl_loadModule(rtl_uString *ustrModuleName, sal_Int32 nRtldMode)
+{
+    oslModule pModule=nullptr;
+    rtl_uString* ustrTmp = nullptr;
+
+    SAL_WARN_IF(ustrModuleName == nullptr, "sal.osl", "string is not valid");
+
+    /* ensure ustrTmp hold valid string */
+    if (osl_getSystemPathFromFileURL(ustrModuleName, &ustrTmp) != osl_File_E_None)
+        rtl_uString_assign(&ustrTmp, ustrModuleName);
+
+    if (ustrTmp)
+    {
+        char buffer[PATH_MAX];
+
+        if (UnicodeToText(buffer, PATH_MAX, ustrTmp->buffer, ustrTmp->length))
+            pModule = osl_loadModuleAscii(buffer, nRtldMode);
+        rtl_uString_release(ustrTmp);
+    }
+
+    return pModule;
+}
+
+/*****************************************************************************/
+/* osl_loadModuleAscii */
+/*****************************************************************************/
+
+oslModule SAL_CALL osl_loadModuleAscii(const char *pModuleName, sal_Int32 nRtldMode)
+{
+#if HAVE_UNIX_DLAPI
+    SAL_WARN_IF(
+        ((nRtldMode & SAL_LOADMODULE_LAZY) != 0
+         && (nRtldMode & SAL_LOADMODULE_NOW) != 0),
+        "sal.osl", "only either LAZY or NOW");
+    if (pModuleName)
+    {
+        int rtld_mode =
+            ((nRtldMode & SAL_LOADMODULE_NOW) ? RTLD_NOW : RTLD_LAZY) |
+            ((nRtldMode & SAL_LOADMODULE_GLOBAL) ? RTLD_GLOBAL : RTLD_LOCAL);
+        void* pLib = dlopen(pModuleName, rtld_mode);
+
+        SAL_WARN_IF(
+            pLib == nullptr, "sal.osl",
+            "dlopen(" << pModuleName << ", " << rtld_mode << "): "
+                << dlerror());
+        return pLib;
+    }
+#else
+    (void) pModuleName;
+    (void) nRtldMode;
+#endif
+    return nullptr;
+}
+
+oslModule osl_loadModuleRelativeAscii(
+    oslGenericFunction baseModule, char const * relativePath, sal_Int32 mode)
+{
+    assert(relativePath && "illegal argument");
+    if (relativePath[0] == '/') {
+        return osl_loadModuleAscii(relativePath, mode);
+    }
+    rtl_String * path = nullptr;
+    rtl_String * suffix = nullptr;
+    oslModule module;
+    if (!getModulePathFromAddress(
+            reinterpret_cast< void * >(baseModule), &path))
+    {
+        return nullptr;
+    }
+    rtl_string_newFromStr_WithLength(
+        &path, path->buffer,
+        (rtl_str_lastIndexOfChar_WithLength(path->buffer, path->length, '/')
+         + 1));
+        /* cut off everything after the last slash; should the original path
+           contain no slash, the resulting path is the empty string */
+    rtl_string_newFromStr(&suffix, relativePath);
+    rtl_string_newConcat(&path, path, suffix);
+    rtl_string_release(suffix);
+    module = osl_loadModuleAscii(path->buffer, mode);
+    rtl_string_release(path);
+    return module;
+}
+
+#endif // !DISABLE_DYNLOADING
+
+/*****************************************************************************/
+/* osl_getModuleHandle */
+/*****************************************************************************/
+
+sal_Bool SAL_CALL
+osl_getModuleHandle(rtl_uString *, oslModule *pResult)
+{
+#if HAVE_UNIX_DLAPI
+    *pResult = static_cast<oslModule>(RTLD_DEFAULT);
+    return true;
+#else
+    *pResult = nullptr;
+    return false;
+#endif
+}
+
+/*****************************************************************************/
+/* osl_unloadModule */
+/*****************************************************************************/
+void SAL_CALL osl_unloadModule(oslModule hModule)
+{
+#if !defined(DISABLE_DYNLOADING) && HAVE_UNIX_DLAPI
+    if (hModule)
+    {
+        int nRet = dlclose(hModule);
+        SAL_INFO_IF(
+            nRet != 0, "sal.osl", "dlclose(" << hModule << "): " << dlerror());
+    }
+#else
+    (void) hModule;
+#endif
+}
+
+namespace {
+
+void * getSymbol(oslModule module, char const * symbol)
+{
+    assert(symbol != nullptr);
+#if HAVE_UNIX_DLAPI
+    // We do want to use dlsym() also in the DISABLE_DYNLOADING case
+    // just to look up symbols in the static executable, I think:
+    void * p = dlsym(module, symbol);
+    SAL_INFO_IF(
+        p == nullptr, "sal.osl",
+        "dlsym(" << module << ", " << symbol << "): " << dlerror());
+#else
+    (void) module;
+    (void) symbol;
+    void *p = nullptr;
+#endif
+    return p;
+}
+
+}
+
+/*****************************************************************************/
+/* osl_getSymbol */
+/*****************************************************************************/
+void* SAL_CALL
+osl_getSymbol(oslModule Module, rtl_uString* pSymbolName)
+{
+    // Arbitrarily using UTF-8:
+    OString s;
+    if (!OUString::unacquired(&pSymbolName).convertToString(
+            &s, RTL_TEXTENCODING_UTF8,
+            (RTL_UNICODETOTEXT_FLAGS_UNDEFINED_ERROR |
+             RTL_UNICODETOTEXT_FLAGS_INVALID_ERROR)))
+    {
+        SAL_INFO(
+            "sal.osl", "cannot convert \"" << OUString::unacquired(&pSymbolName)
+                << "\" to UTF-8");
+        return nullptr;
+    }
+    if (s.indexOf('\0') != -1) {
+        SAL_INFO("sal.osl", "\"" << s << "\" contains embedded NUL");
+        return nullptr;
+    }
+    return getSymbol(Module, s.getStr());
+}
+
+/*****************************************************************************/
+/* osl_getAsciiFunctionSymbol */
+/*****************************************************************************/
+oslGenericFunction SAL_CALL
+osl_getAsciiFunctionSymbol(oslModule Module, const char *pSymbol)
+{
+    return reinterpret_cast<oslGenericFunction>(getSymbol(Module, pSymbol));
+        // requires conditionally-supported conversion from void * to function
+        // pointer
+}
+
+/*****************************************************************************/
+/* osl_getFunctionSymbol */
+/*****************************************************************************/
+oslGenericFunction SAL_CALL
+osl_getFunctionSymbol(oslModule module, rtl_uString *puFunctionSymbolName)
+{
+    return reinterpret_cast<oslGenericFunction>(
+        osl_getSymbol(module, puFunctionSymbolName));
+        // requires conditionally-supported conversion from void * to function
+        // pointer
+}
+
+/*****************************************************************************/
+/* osl_getModuleURLFromAddress */
+/*****************************************************************************/
+sal_Bool SAL_CALL osl_getModuleURLFromAddress(void * addr, rtl_uString ** ppLibraryUrl)
+{
+    bool result = false;
+    rtl_String * path = nullptr;
+    if (getModulePathFromAddress(addr, &path))
+    {
+        rtl_string2UString(ppLibraryUrl,
+                           path->buffer,
+                           path->length,
+                           osl_getThreadTextEncoding(),
+                           OSTRING_TO_OUSTRING_CVTFLAGS);
+
+        SAL_WARN_IF(
+            *ppLibraryUrl == nullptr, "sal.osl", "rtl_string2UString failed");
+        auto const e = osl_getFileURLFromSystemPath(*ppLibraryUrl, ppLibraryUrl);
+        if (e == osl_File_E_None)
+        {
+            SAL_INFO("sal.osl", "osl_getModuleURLFromAddress(" << addr << ") => " << OUString(*ppLibraryUrl));
+
+            result = true;
+        }
+        else
+        {
+            SAL_WARN(
+                "sal.osl",
+                "osl_getModuleURLFromAddress(" << addr << "), osl_getFileURLFromSystemPath("
+                    << OUString::unacquired(ppLibraryUrl) << ") failed with " << e);
+            result = false;
+        }
+        rtl_string_release(path);
+    }
+    return result;
+}
+
+/*****************************************************************************/
+/* osl_getModuleURLFromFunctionAddress */
+/*****************************************************************************/
+sal_Bool SAL_CALL osl_getModuleURLFromFunctionAddress(oslGenericFunction addr, rtl_uString ** ppLibraryUrl)
+{
+    return osl_getModuleURLFromAddress(
+        reinterpret_cast<void*>(addr), ppLibraryUrl);
+        // requires conditionally-supported conversion from function pointer to
+        // void *
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */