gecko-dev/xpcom/components/nsNativeComponentLoader.cpp

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