зеркало из https://github.com/mozilla/gecko-dev.git
284 строки
8.5 KiB
C++
284 строки
8.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org Code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK *****
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* This Original Code has been modified by IBM Corporation.
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* Modifications made by IBM described herein are
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* Copyright (c) International Business Machines
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* Corporation, 2000
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*
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* Modifications to Mozilla code or documentation
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* identified per MPL Section 3.3
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*
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* Date Modified by Description of modification
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* 04/20/2000 IBM Corp. Added PR_CALLBACK for Optlink use in OS2
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*/
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/* Allow logging in the release build */
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#ifdef MOZ_LOGGING
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#define FORCE_PR_LOG
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#endif
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#include "nsNativeComponentLoader.h"
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#include "prlog.h"
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#include "prinit.h"
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#include "prerror.h"
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#include "nsComponentManager.h"
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#include "nsCRTGlue.h"
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#include "nsModule.h"
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#include "nsThreadUtils.h"
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#include "nsTraceRefcntImpl.h"
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#include "nsILocalFile.h"
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#include "nsIModule.h"
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#include "nsIProxyObjectManager.h"
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#ifdef XP_WIN
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#include <windows.h>
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#endif
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#ifdef XP_MACOSX
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#include <signal.h>
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#endif
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#ifdef VMS
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#include <lib$routines.h>
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#include <ssdef.h>
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#endif
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#if defined(DEBUG) && !defined(XP_BEOS)
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#define IMPLEMENT_BREAK_AFTER_LOAD
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#endif
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static PRLogModuleInfo *nsNativeModuleLoaderLog =
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PR_NewLogModule("nsNativeModuleLoader");
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#define LOG(level, args) PR_LOG(nsNativeModuleLoaderLog, level, args)
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NS_IMPL_QUERY_INTERFACE1(nsNativeModuleLoader,
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nsIModuleLoader)
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NS_IMPL_ADDREF_USING_AGGREGATOR(nsNativeModuleLoader,
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nsComponentManagerImpl::gComponentManager)
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NS_IMPL_RELEASE_USING_AGGREGATOR(nsNativeModuleLoader,
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nsComponentManagerImpl::gComponentManager)
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nsresult
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nsNativeModuleLoader::Init()
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{
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NS_ASSERTION(NS_IsMainThread(), "Startup not on main thread?");
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LOG(PR_LOG_DEBUG, ("nsNativeModuleLoader::Init()"));
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return mLibraries.Init() ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
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}
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NS_IMETHODIMP
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nsNativeModuleLoader::LoadModule(nsILocalFile* aFile, nsIModule* *aResult)
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{
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nsresult rv;
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if (!NS_IsMainThread()) {
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// If this call is off the main thread, synchronously proxy it
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// to the main thread.
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nsCOMPtr<nsIModuleLoader> proxythis;
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rv = NS_GetProxyForObject(NS_PROXY_TO_MAIN_THREAD,
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NS_GET_IID(nsIModuleLoader),
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this, NS_PROXY_SYNC,
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getter_AddRefs(proxythis));
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if (NS_FAILED(rv))
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return rv;
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return proxythis->LoadModule(aFile, aResult);
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}
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NS_ASSERTION(NS_IsMainThread(), "LoadModule should always proxy to the main thread!");
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// Only load components that end in the proper dynamic library suffix
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nsCAutoString filePath;
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aFile->GetNativePath(filePath);
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if (!StringTail(filePath, sizeof(MOZ_DLL_SUFFIX) - 1).
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LowerCaseEqualsLiteral(MOZ_DLL_SUFFIX))
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return NS_ERROR_INVALID_ARG;
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nsCOMPtr<nsIHashable> hashedFile(do_QueryInterface(aFile));
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if (!hashedFile) {
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NS_ERROR("nsIFile is not nsIHashable");
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return NS_NOINTERFACE;
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}
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NativeLoadData data;
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if (mLibraries.Get(hashedFile, &data)) {
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NS_ASSERTION(data.module, "Corrupt mLibraries hash");
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NS_ADDREF(*aResult = data.module);
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LOG(PR_LOG_DEBUG,
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("nsNativeModuleLoader::LoadModule(\"%s\") - found in cache",
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filePath.get()));
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return NS_OK;
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}
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// We haven't loaded this module before
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rv = aFile->Load(&data.library);
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if (NS_FAILED(rv)) {
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char errorMsg[1024] = "<unknown; can't get error from NSPR>";
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if (PR_GetErrorTextLength() < (int) sizeof(errorMsg))
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PR_GetErrorText(errorMsg);
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LOG(PR_LOG_ERROR,
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("nsNativeModuleLoader::LoadModule(\"%s\") - load FAILED, "
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"rv: %lx, error:\n\t%s\n",
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filePath.get(), rv, errorMsg));
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#ifdef DEBUG
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fprintf(stderr,
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"nsNativeModuleLoader::LoadModule(\"%s\") - load FAILED, "
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"rv: %lx, error:\n\t%s\n",
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filePath.get(), (unsigned long)rv, errorMsg);
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#endif
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return rv;
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}
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#ifdef IMPLEMENT_BREAK_AFTER_LOAD
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nsCAutoString leafName;
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aFile->GetNativeLeafName(leafName);
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char *env = getenv("XPCOM_BREAK_ON_LOAD");
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char *blist;
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if (env && *env && (blist = strdup(env))) {
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char *nextTok = blist;
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while (char *token = NS_strtok(":", &nextTok)) {
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if (leafName.Find(token, PR_TRUE) != kNotFound) {
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NS_BREAK();
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}
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}
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free(blist);
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}
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#endif
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nsGetModuleProc proc = (nsGetModuleProc)
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PR_FindFunctionSymbol(data.library, NS_GET_MODULE_SYMBOL);
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if (proc) {
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rv = proc(nsComponentManagerImpl::gComponentManager,
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aFile,
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getter_AddRefs(data.module));
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if (NS_SUCCEEDED(rv)) {
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LOG(PR_LOG_DEBUG,
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("nsNativeModuleLoader::LoadModule(\"%s\") - Success",
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filePath.get()));
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if (mLibraries.Put(hashedFile, data)) {
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NS_ADDREF(*aResult = data.module);
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return NS_OK;
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}
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}
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else {
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LOG(PR_LOG_WARNING,
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("nsNativeModuleLoader::LoadModule(\"%s\") - "
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"Call to NSGetModule failed, rv: %lx", filePath.get(), rv));
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}
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}
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else {
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LOG(PR_LOG_ERROR,
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("nsNativeModuleLoader::LoadModule(\"%s\") - "
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"Symbol NSGetModule not found", filePath.get()));
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}
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// at some point we failed, clean up
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data.module = nsnull;
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PR_UnloadLibrary(data.library);
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return NS_ERROR_FAILURE;
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}
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PLDHashOperator
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nsNativeModuleLoader::ReleaserFunc(nsIHashable* aHashedFile,
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NativeLoadData& aLoadData, void*)
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{
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aLoadData.module = nsnull;
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return PL_DHASH_NEXT;
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}
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PLDHashOperator
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nsNativeModuleLoader::UnloaderFunc(nsIHashable* aHashedFile,
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NativeLoadData& aLoadData, void*)
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{
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if (PR_LOG_TEST(nsNativeModuleLoaderLog, PR_LOG_DEBUG)) {
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nsCOMPtr<nsIFile> file(do_QueryInterface(aHashedFile));
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nsCAutoString filePath;
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file->GetNativePath(filePath);
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LOG(PR_LOG_DEBUG,
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("nsNativeModuleLoader::UnloaderFunc(\"%s\")", filePath.get()));
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}
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#ifdef NS_BUILD_REFCNT_LOGGING
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nsTraceRefcntImpl::SetActivityIsLegal(PR_FALSE);
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#endif
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#if 0
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// XXXbsmedberg: do this as soon as the static-destructor crash(es)
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// are fixed
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PRStatus ret = PR_UnloadLibrary(aLoadData.library);
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NS_ASSERTION(ret == PR_SUCCESS, "Failed to unload library");
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#endif
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#ifdef NS_BUILD_REFCNT_LOGGING
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nsTraceRefcntImpl::SetActivityIsLegal(PR_TRUE);
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#endif
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return PL_DHASH_REMOVE;
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}
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void
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nsNativeModuleLoader::UnloadLibraries()
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{
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NS_ASSERTION(NS_IsMainThread(), "Shutdown not on main thread?");
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mLibraries.Enumerate(ReleaserFunc, nsnull);
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mLibraries.Enumerate(UnloaderFunc, nsnull);
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}
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