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pjs/xpcom/components/nsNativeComponentLoader.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1999 Netscape Communications Corporation. All Rights
* Reserved.
*
* Contributors:
* 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
*/
#include "prmem.h"
#include "prerror.h"
#include "prsystem.h" // PR_GetDirectorySeparator
#include "nsNativeComponentLoader.h"
#include "nsComponentManager.h"
#include "nsCOMPtr.h"
#include "nsIServiceManager.h"
#include "nsIModule.h"
#include "xcDll.h"
#include "nsHashtable.h"
#include "nsHashtableEnumerator.h"
#include "nsXPIDLString.h"
#include "nsCRT.h"
#include "nsIObserverService.h"
#if defined(XP_MAC) // sdagley dougt fix
#include <Files.h>
#include <Errors.h>
#include "nsILocalFileMac.h"
#endif
// Logging of debug output
#ifdef MOZ_LOGGING
#define FORCE_PR_LOG /* Allow logging in the release build */
#endif
#include "prlog.h"
extern PRLogModuleInfo *nsComponentManagerLog;
nsNativeComponentLoader::nsNativeComponentLoader() :
mCompMgr(nsnull), mDllStore(nsnull)
{
NS_INIT_REFCNT();
}
static PRBool PR_CALLBACK
nsDll_Destroy(nsHashKey *aKey, void *aData, void* closure)
{
nsDll* entry = NS_STATIC_CAST(nsDll*, aData);
delete entry;
return PR_TRUE;
}
nsNativeComponentLoader::~nsNativeComponentLoader()
{
mCompMgr = nsnull;
delete mDllStore;
}
NS_IMPL_THREADSAFE_ISUPPORTS1(nsNativeComponentLoader, nsIComponentLoader);
NS_IMETHODIMP
nsNativeComponentLoader::GetFactory(const nsIID & aCID,
const char *aLocation,
const char *aType,
nsIFactory **_retval)
{
nsresult rv;
if (!_retval)
return NS_ERROR_NULL_POINTER;
/* use a hashtable of WeakRefs to store the factory object? */
/* Should this all live in xcDll? */
nsDll *dll;
rv = CreateDll(nsnull, aLocation, &dll);
if (NS_FAILED(rv))
return rv;
if (!dll)
return NS_ERROR_OUT_OF_MEMORY;
if (!dll->IsLoaded()) {
PR_LOG(nsComponentManagerLog, PR_LOG_DEBUG,
("nsNativeComponentLoader: loading \"%s\"",
dll->GetDisplayPath()));
if (!dll->Load()) {
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("nsNativeComponentLoader: load FAILED"));
char errorMsg[1024] = "<unknown; can't get error from NSPR>";
if (PR_GetErrorTextLength() < (int) sizeof(errorMsg))
PR_GetErrorText(errorMsg);
DumpLoadError(dll, "GetFactory", errorMsg);
return NS_ERROR_FAILURE;
}
}
/* Get service manager for factory */
nsCOMPtr<nsIServiceManager> serviceMgr;
rv = NS_GetServiceManager(getter_AddRefs(serviceMgr));
if (NS_FAILED(rv))
return rv; // XXX translate error code?
rv = GetFactoryFromModule(dll, aCID, _retval);
#ifdef OBSOLETE_MODULE_LOADING
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_FACTORY_NOT_LOADED) {
rv = GetFactoryFromNSGetFactory(dll, aCID, serviceMgr, _retval);
}
}
#endif
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("nsNativeComponentLoader: Factory creation %s for %s",
(NS_SUCCEEDED(rv) ? "succeeded" : "FAILED"),
aLocation));
// If the dll failed to get us a factory. But the dll registered that
// it would be able to create a factory for this CID. mmh!
// We cannot just delete the dll as the dll could be hosting
// other CID for which factory creation can pass.
// We will just let it be. The effect will be next time we try
// creating the object, we will query the dll again. Since the
// dll is loaded, this aint a big hit. So for optimized builds
// this is ok to limp along.
NS_WARN_IF_FALSE(NS_SUCCEEDED(rv), "Factory creation failed");
return rv;
}
NS_IMETHODIMP
nsNativeComponentLoader::Init(nsIComponentManager *aCompMgr, nsISupports *aReg)
{
mCompMgr = aCompMgr;
if (!mCompMgr)
return NS_ERROR_INVALID_ARG;
mDllStore = new nsObjectHashtable(nsnull, nsnull, // never copy
nsDll_Destroy, nsnull,
256, /* Thead Safe */ PR_TRUE);
if (!mDllStore)
return NS_ERROR_OUT_OF_MEMORY;
return NS_OK;
}
NS_IMETHODIMP
nsNativeComponentLoader::AutoRegisterComponents(PRInt32 aWhen,
nsIFile *aDirectory)
{
#ifdef DEBUG
/* do we _really_ want to print this every time? */
fprintf(stderr, "nsNativeComponentLoader: autoregistering begins.\n");
#endif
nsresult rv = RegisterComponentsInDir(aWhen, aDirectory);
#ifdef DEBUG
fprintf(stderr, "nsNativeComponentLoader: autoregistering %s\n",
NS_FAILED(rv) ? "FAILED" : "succeeded");
#endif
return rv;
}
nsresult
nsNativeComponentLoader::RegisterComponentsInDir(PRInt32 when,
nsIFile *dir)
{
nsresult rv = NS_ERROR_FAILURE;
PRBool isDir = PR_FALSE;
#if 0
// Going to many of these checks is a performance hit on the mac.
// Since these routines are called relatively infrequently and
// we will fail anyway down the line if a directory aint there,
// we are commenting this check out.
// Make sure we are dealing with a directory
rv = dir->IsDirectory(&isDir);
if (NS_FAILED(rv)) return rv;
if (!isDir)
return NS_ERROR_INVALID_ARG;
#endif /* 0 */
// Create a directory iterator
nsCOMPtr<nsISimpleEnumerator> dirIterator;
rv = dir->GetDirectoryEntries(getter_AddRefs(dirIterator));
if (NS_FAILED(rv)) return rv;
// whip through the directory to register every file
nsCOMPtr<nsIFile> dirEntry;
PRBool more = PR_FALSE;
rv = dirIterator->HasMoreElements(&more);
if (NS_FAILED(rv)) return rv;
while (more == PR_TRUE)
{
rv = dirIterator->GetNext((nsISupports**)getter_AddRefs(dirEntry));
if (NS_SUCCEEDED(rv))
{
rv = dirEntry->IsDirectory(&isDir);
if (NS_SUCCEEDED(rv))
{
if (isDir == PR_TRUE)
{
// This is a directory. Grovel for components into the directory.
rv = RegisterComponentsInDir(when, dirEntry);
}
else
{
PRBool registered;
// This is a file. Try to register it.
rv = AutoRegisterComponent(when, dirEntry, &registered);
}
}
}
rv = dirIterator->HasMoreElements(&more);
if (NS_FAILED(rv)) return rv;
}
return rv;
}
static nsresult PR_CALLBACK
nsFreeLibrary(nsDll *dll, nsIServiceManager *serviceMgr, PRInt32 when)
{
nsresult rv = NS_ERROR_FAILURE;
if (!dll || dll->IsLoaded() == PR_FALSE)
{
return NS_ERROR_INVALID_ARG;
}
// Get if the dll was marked for unload in an earlier round
PRBool dllMarkedForUnload = dll->IsMarkedForUnload();
// Reset dll marking for unload just in case we return with
// an error.
dll->MarkForUnload(PR_FALSE);
PRBool canUnload = PR_FALSE;
// Get the module object
nsCOMPtr<nsIModule> mobj;
/* XXXshaver cheat and use the global component manager */
rv = dll->GetModule(NS_STATIC_CAST(nsIComponentManager*, nsComponentManagerImpl::gComponentManager),
getter_AddRefs(mobj));
if (NS_SUCCEEDED(rv))
{
rv = mobj->CanUnload(nsComponentManagerImpl::gComponentManager, &canUnload);
}
#ifdef OBSOLETE_MODULE_LOADING
else
{
// Try the old method of module unloading
nsCanUnloadProc proc = (nsCanUnloadProc)dll->FindSymbol("NSCanUnload");
if (proc)
{
canUnload = proc(serviceMgr);
rv = NS_OK; // No error status returned by call.
}
else
{
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("nsNativeComponentLoader: Unload cant get nsIModule or NSCanUnload for %s",
dll->GetDisplayPath()));
return rv;
}
}
#endif /* OBSOLETE_MODULE_LOADING */
mobj = nsnull; // Release our reference to the module object
// When shutting down, whether we can unload the dll or not,
// we will shutdown the dll to release any memory it has got
if (when == nsIComponentManagerObsolete::NS_Shutdown)
{
dll->Shutdown();
}
// Check error status on CanUnload() call
if (NS_FAILED(rv))
{
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("nsNativeComponentLoader: nsIModule::CanUnload() returned error for %s.",
dll->GetDisplayPath()));
return rv;
}
if (canUnload)
{
if (dllMarkedForUnload)
{
PR_LOG(nsComponentManagerLog, PR_LOG_DEBUG,
("nsNativeComponentLoader: + Unloading \"%s\".", dll->GetDisplayPath()));
#if 0
// XXX dlls aren't counting their outstanding instances correctly
// XXX hence, dont unload until this gets enforced.
rv = dll->Unload();
#endif /* 0 */
}
else
{
PR_LOG(nsComponentManagerLog, PR_LOG_DEBUG,
("nsNativeComponentLoader: Ready for unload \"%s\".", dll->GetDisplayPath()));
}
}
else
{
PR_LOG(nsComponentManagerLog, PR_LOG_ALWAYS,
("nsNativeComponentLoader: NOT ready for unload %s", dll->GetDisplayPath()));
rv = NS_ERROR_FAILURE;
}
return rv;
}
struct freeLibrariesClosure
{
nsIServiceManager *serviceMgr;
PRInt32 when;
};
static PRBool PR_CALLBACK
nsFreeLibraryEnum(nsHashKey *aKey, void *aData, void* closure)
{
nsDll *dll = (nsDll *) aData;
struct freeLibrariesClosure *callData = (struct freeLibrariesClosure *) closure;
nsFreeLibrary(dll,
(callData ? callData->serviceMgr : NULL),
(callData ? callData->when : nsIComponentManagerObsolete::NS_Timer));
return PR_TRUE;
}
/*
* SelfRegisterDll
*
* Given a dll abstraction, this will load, selfregister the dll and
* unload the dll.
*
*/
nsresult
nsNativeComponentLoader::SelfRegisterDll(nsDll *dll,
const char *registryLocation,
PRBool deferred)
{
// Precondition: dll is not loaded already, unless we're deferred
PR_ASSERT(deferred || dll->IsLoaded() == PR_FALSE);
nsresult res;
nsCOMPtr<nsIServiceManager> serviceMgr;
res = NS_GetServiceManager(getter_AddRefs(serviceMgr));
if (NS_FAILED(res)) return res;
if (dll->Load() == PR_FALSE)
{
// Cannot load. Probably not a dll.
char errorMsg[1024] = "Cannot get error from nspr. Not enough memory.";
if (PR_GetErrorTextLength() < (int) sizeof(errorMsg))
PR_GetErrorText(errorMsg);
DumpLoadError(dll, "SelfRegisterDll", errorMsg);
return NS_ERROR_FAILURE;
}
PR_LOG(nsComponentManagerLog, PR_LOG_DEBUG,
("nsNativeComponentLoader: Loaded \"%s\".", dll->GetDisplayPath()));
// Tell the module to self register
nsCOMPtr<nsIFile> fs;
nsCOMPtr<nsIModule> mobj;
res = dll->GetModule(mCompMgr, getter_AddRefs(mobj));
if (NS_SUCCEEDED(res))
{
/*************************************************************
* WARNING: Why are use introducing 'res2' here and then *
* later assigning it to 'res' rather than just using 'res'? *
* This is because this code turns up a code-generation bug *
* in VC6 on NT. Assigning to 'res' on the next line causes *
* the value of 'dll' to get nulled out! The two seem to be *
* getting aliased together during compilation. *
*************************************************************/
nsresult res2 = dll->GetDllSpec(getter_AddRefs(fs)); // don't change 'res2' -- see warning, above
if (NS_SUCCEEDED(res2)) {
res = mobj->RegisterSelf(mCompMgr, fs, registryLocation,
nativeComponentType);
}
else
{
res = res2; // don't take this out -- see warning, above
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("nsNativeComponentLoader: dll->GetDllSpec() on %s FAILED.",
dll->GetDisplayPath()));
}
mobj = NULL; // Force a release of the Module object before unload()
}
#ifdef OBSOLETE_MODULE_LOADING
else
{
res = NS_ERROR_NO_INTERFACE;
nsRegisterProc regproc = (nsRegisterProc)dll->FindSymbol("NSRegisterSelf");
if (regproc)
{
// Call the NSRegisterSelfProc to enable dll registration
res = regproc(serviceMgr, registryLocation);
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("nsNativeComponentLoader: %s using OBSOLETE NSRegisterSelf()",
dll->GetDisplayPath()));
}
}
#endif /* OBSOLETE_MODULE_LOADING */
// Update the timestamp and size of the dll in registry
// Don't enter deferred modules in the registry, because it might only be
// able to register on some later autoreg, after another component has been
// installed.
if (res != NS_ERROR_FACTORY_REGISTER_AGAIN) {
PRInt64 modTime;
if (!fs)
return res;
fs->GetLastModifiedTime(&modTime);
nsCOMPtr<nsIComponentLoaderManager> manager = do_QueryInterface(mCompMgr);
if (!manager)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIFile> fs;
res = dll->GetDllSpec(getter_AddRefs(fs));
if (NS_FAILED(res)) return res;
manager->SaveFileInfo(fs, registryLocation, modTime);
}
return res;
}
//
// MOZ_DEMANGLE_SYMBOLS is only a linux + MOZ_DEBUG thing.
//
#if defined(MOZ_DEMANGLE_SYMBOLS)
#include "nsTraceRefcnt.h" // for nsTraceRefcnt::DemangleSymbol()
#endif
nsresult
nsNativeComponentLoader::DumpLoadError(nsDll *dll,
const char *aCallerName,
const char *aNsprErrorMsg)
{
PR_ASSERT(aCallerName != NULL);
if (nsnull == dll || nsnull == aNsprErrorMsg)
return NS_OK;
nsCAutoString errorMsg(aNsprErrorMsg);
#if defined(MOZ_DEMANGLE_SYMBOLS)
// Demangle undefined symbols
nsCAutoString undefinedMagicString("undefined symbol:");
PRInt32 offset = errorMsg.Find(undefinedMagicString, PR_TRUE);
if (offset != kNotFound)
{
nsCAutoString symbol(errorMsg);
nsCAutoString demangledSymbol;
symbol.Cut(0,offset);
symbol.Cut(0,undefinedMagicString.Length());
symbol.StripWhitespace();
char demangled[4096] = "\0";
nsTraceRefcnt::DemangleSymbol(symbol.get(),demangled,sizeof(demangled));
if (demangled && *demangled != '\0')
demangledSymbol = demangled;
if (!demangledSymbol.IsEmpty())
{
nsCAutoString tmp(errorMsg);
tmp.Cut(offset + undefinedMagicString.Length(),
tmp.Length() - offset - undefinedMagicString.Length());
tmp += " \n";
tmp += demangledSymbol;
errorMsg = tmp;
}
}
#endif // MOZ_DEMANGLE_SYMBOLS
// Do NSPR log
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("nsNativeComponentLoader: %s(%s) Load FAILED with error:%s",
aCallerName,
dll->GetDisplayPath(),
errorMsg.get()));
// Dump to screen if needed
#ifdef PRINT_CRITICAL_ERROR_TO_SCREEN
fprintf(stderr,
"**************************************************\n"
"nsNativeComponentLoader: %s(%s) Load FAILED with error: %s\n"
"**************************************************\n",
aCallerName,
dll->GetDisplayPath(),
errorMsg.get());
#endif
return NS_OK;
}
nsresult
nsNativeComponentLoader::SelfUnregisterDll(nsDll *dll)
{
nsresult res;
nsCOMPtr<nsIServiceManager> serviceMgr;
res = NS_GetServiceManager(getter_AddRefs(serviceMgr));
if (NS_FAILED(res)) return res;
if (dll->Load() == PR_FALSE)
{
// Cannot load. Probably not a dll.
return(NS_ERROR_FAILURE);
}
// Tell the module to self register
nsCOMPtr<nsIModule> mobj;
res = dll->GetModule(mCompMgr, getter_AddRefs(mobj));
if (NS_SUCCEEDED(res))
{
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("nsNativeComponentLoader: %s using nsIModule to unregister self.", dll->GetDisplayPath()));
nsCOMPtr<nsIFile> fs;
res = dll->GetDllSpec(getter_AddRefs(fs));
if (NS_FAILED(res)) return res;
// Get registry location for spec
nsXPIDLCString registryName;
// what I want to do here is QI for a Component Registration Manager. Since this
// has not been invented yet, QI to the obsolete manager. Kids, don't do this at home.
nsCOMPtr<nsIComponentManagerObsolete> obsoleteManager = do_QueryInterface(mCompMgr, &res);
if (obsoleteManager)
res = obsoleteManager->RegistryLocationForSpec(fs, getter_Copies(registryName));
if (NS_FAILED(res)) return res;
mobj->UnregisterSelf(mCompMgr, fs, registryName);
}
#ifdef OBSOLETE_MODULE_LOADING
else
{
res = NS_ERROR_NO_INTERFACE;
nsUnregisterProc unregproc =
(nsUnregisterProc) dll->FindSymbol("NSUnregisterSelf");
if (unregproc)
{
// Call the NSUnregisterSelfProc to enable dll de-registration
res = unregproc(serviceMgr, dll->GetPersistentDescriptorString());
}
}
#endif /* OBSOLETE_MODULE_LOADING */
return res;
}
nsresult
nsNativeComponentLoader::AutoUnregisterComponent(PRInt32 when,
nsIFile *component,
PRBool *unregistered)
{
nsresult rv = NS_ERROR_FAILURE;
nsXPIDLCString persistentDescriptor;
// what I want to do here is QI for a Component Registration Manager. Since this
// has not been invented yet, QI to the obsolete manager. Kids, don't do this at home.
nsCOMPtr<nsIComponentManagerObsolete> obsoleteManager = do_QueryInterface(mCompMgr, &rv);
if (obsoleteManager)
rv = obsoleteManager->RegistryLocationForSpec(component,
getter_Copies(persistentDescriptor));
if (NS_FAILED(rv)) return rv;
// Notify observers, if any, of autoregistration work
nsCOMPtr<nsIObserverService> observerService =
do_GetService("@mozilla.org/observer-service;1", &rv);
if (NS_SUCCEEDED(rv))
{
nsCOMPtr<nsIServiceManager> mgr;
rv = NS_GetServiceManager(getter_AddRefs(mgr));
if (NS_SUCCEEDED(rv))
{
(void) observerService->NotifyObservers(mgr,
NS_XPCOM_AUTOREGISTRATION_OBSERVER_ID,
NS_LITERAL_STRING("Unregistering native component").get());
}
}
nsDll *dll = NULL;
rv = CreateDll(component, persistentDescriptor, &dll);
if (NS_FAILED(rv) || dll == NULL) return rv;
rv = SelfUnregisterDll(dll);
// Remove any autoreg info about this dll
nsCStringKey key(persistentDescriptor);
mDllStore->RemoveAndDelete(&key);
nsCOMPtr<nsIComponentLoaderManager> manager = do_QueryInterface(mCompMgr, &rv);
if (NS_FAILED(rv))
return rv;
manager->RemoveFileInfo(component, nsnull);
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("nsNativeComponentLoader: AutoUnregistration for %s %s.",
(NS_FAILED(rv) ? "FAILED" : "succeeded"), dll->GetDisplayPath()));
return rv;
}
nsresult
nsNativeComponentLoader::AutoRegisterComponent(PRInt32 when,
nsIFile *component,
PRBool *registered)
{
nsresult rv;
if (!registered)
return NS_ERROR_NULL_POINTER;
/* this should be a pref or registry entry, or something */
static const char *ValidDllExtensions[] = {
".dll", /* Windows */
".so", /* Unix */
".shlb", /* Mac ? */
".dso", /* Unix ? */
".dylib", /* Unix: Mach */
".so.1.0", /* Unix: BSD */
".sl", /* Unix: HP-UX */
#if defined(VMS)
".exe", /* Open VMS */
#endif
".dlm", /* new for all platforms */
NULL
};
*registered = PR_FALSE;
#if 0
// This is a performance hit on mac. Since we have already checked
// this; plus is we dont, load will fail anyway later on, this
// is being commented out.
// Ensure we are dealing with a file as opposed to a dir
PRBool b = PR_FALSE;
rv = component->IsFile(&b);
if (NS_FAILED(rv) || !b)
return rv;
#endif /* 0 */
// deal only with files that have a valid extension
PRBool validExtension = PR_FALSE;
#if defined(XP_MAC) // sdagley dougt fix
// rjc - on Mac, check the file's type code (skip checking the creator code)
nsCOMPtr<nsILocalFileMac> localFileMac = do_QueryInterface(component);
if (localFileMac)
{
OSType type;
rv = localFileMac->GetFileType(&type);
if (NS_SUCCEEDED(rv))
{
// on Mac, Mozilla shared libraries are of type 'shlb'
// Note: we don't check the creator (which for Mozilla is 'MOZZ')
// so that 3rd party shared libraries will be noticed!
validExtension = ((type == 'shlb') || (type == 'NSPL'));
}
}
#else
nsCAutoString leafName;
rv = component->GetNativeLeafName(leafName);
if (NS_FAILED(rv)) return rv;
int flen = leafName.Length();
for (int i=0; ValidDllExtensions[i] != NULL; i++)
{
int extlen = PL_strlen(ValidDllExtensions[i]);
// Does fullname end with this extension
if (flen >= extlen &&
!PL_strcasecmp(leafName.get() + (flen - extlen), ValidDllExtensions[i])
)
{
validExtension = PR_TRUE;
break;
}
}
#endif
if (validExtension == PR_FALSE)
// Skip invalid extensions
return NS_OK;
nsXPIDLCString persistentDescriptor;
// what I want to do here is QI for a Component Registration Manager. Since this
// has not been invented yet, QI to the obsolete manager. Kids, don't do this at home.
nsCOMPtr<nsIComponentManagerObsolete> obsoleteManager = do_QueryInterface(mCompMgr, &rv);
if (obsoleteManager)
rv = obsoleteManager->RegistryLocationForSpec(component,
getter_Copies(persistentDescriptor));
if (NS_FAILED(rv))
return rv;
nsCStringKey key(persistentDescriptor);
// Get the registry representation of the dll, if any
nsDll *dll;
rv = CreateDll(component, persistentDescriptor, &dll);
if (NS_FAILED(rv))
return rv;
if (dll != NULL)
{
// Make sure the dll is OK
if (dll->GetStatus() != NS_OK)
{
PR_LOG(nsComponentManagerLog, PR_LOG_ALWAYS,
("nsNativeComponentLoader: + nsDll not NS_OK \"%s\". Skipping...",
dll->GetDisplayPath()));
return NS_ERROR_FAILURE;
}
// We already have seen this dll. Check if this dll changed
if (!dll->HasChanged())
{
// Dll hasn't changed. Skip.
PR_LOG(nsComponentManagerLog, PR_LOG_ALWAYS,
("nsNativeComponentLoader: + nsDll not changed \"%s\". Skipping...",
dll->GetDisplayPath()));
return NS_OK;
}
// Aagh! the dll has changed since the last time we saw it.
// re-register dll
// Notify observers, if any, of autoregistration work
nsCOMPtr<nsIObserverService> observerService =
do_GetService("@mozilla.org/observer-service;1", &rv);
if (NS_SUCCEEDED(rv))
{
nsCOMPtr<nsIServiceManager> mgr;
rv = NS_GetServiceManager(getter_AddRefs(mgr));
if (NS_SUCCEEDED(rv))
{
// this string can't come from a string bundle, because we
// don't have string bundles yet.
NS_ConvertASCIItoUCS2 fileName("(no name)");
// get the file name
nsCOMPtr<nsIFile> dllSpec;
if (NS_SUCCEEDED(dll->GetDllSpec(getter_AddRefs(dllSpec))) && dllSpec)
{
dllSpec->GetLeafName(fileName);
}
// this string can't come from a string bundle, because we
// don't have string bundles yet.
(void) observerService->
NotifyObservers(mgr,
NS_XPCOM_AUTOREGISTRATION_OBSERVER_ID,
PromiseFlatString(NS_LITERAL_STRING("Registering native component ") +
fileName).get());
}
}
if (dll->IsLoaded())
{
// We loaded the old version of the dll and now we find that the
// on-disk copy if newer. Try to unload the dll.
nsCOMPtr<nsIServiceManager> serviceMgr;
rv = NS_GetServiceManager(getter_AddRefs(serviceMgr));
rv = nsFreeLibrary(dll, serviceMgr, when);
if (NS_FAILED(rv))
{
// THIS IS THE WORST SITUATION TO BE IN.
// Dll doesn't want to be unloaded. Cannot re-register
// this dll.
PR_LOG(nsComponentManagerLog, PR_LOG_ALWAYS,
("nsNativeComponentLoader: *** Dll already loaded. "
"Cannot unload either. Hence cannot re-register "
"\"%s\". Skipping...", dll->GetDisplayPath()));
return rv;
}
else {
// dll doesn't have a CanUnload proc. Guess it is
// ok to unload it.
dll->Unload();
PR_LOG(nsComponentManagerLog, PR_LOG_ALWAYS,
("nsNativeComponentLoader: + Unloading \"%s\". (no CanUnloadProc).",
dll->GetDisplayPath()));
}
} // dll isloaded
// Sanity.
if (dll->IsLoaded())
{
// We went through all the above to make sure the dll
// is unloaded. And here we are with the dll still
// loaded. Whoever taught dp programming...
PR_LOG(nsComponentManagerLog, PR_LOG_ALWAYS,
("nsNativeComponentLoader: Dll still loaded. Cannot re-register "
"\"%s\". Skipping...", dll->GetDisplayPath()));
return NS_ERROR_FAILURE;
}
} // dll != NULL
else
{
// Create and add the dll to the mDllStore
// It is ok to do this even if the creation of nsDll
// didnt succeed. That way we wont do this again
// when we encounter the same dll.
dll = new nsDll(persistentDescriptor);
if (dll == NULL)
return NS_ERROR_OUT_OF_MEMORY;
mDllStore->Put(&key, (void *) dll);
} // dll == NULL
// Either we are seeing the dll for the first time or the dll has
// changed since we last saw it and it is unloaded successfully.
//
// Now we can try register the dll for sure.
nsresult res = SelfRegisterDll(dll, persistentDescriptor, PR_FALSE);
if (NS_FAILED(res))
{
if (res == NS_ERROR_FACTORY_REGISTER_AGAIN) {
/* defer for later loading */
mDeferredComponents.AppendElement(dll);
return NS_OK;
} else {
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("nsNativeComponentLoader: Autoregistration FAILED for "
"\"%s\". Skipping...", dll->GetDisplayPath()));
return NS_ERROR_FACTORY_NOT_REGISTERED;
}
}
else
{
PR_LOG(nsComponentManagerLog, PR_LOG_ALWAYS,
("nsNativeComponentLoader: Autoregistration Passed for "
"\"%s\".", dll->GetDisplayPath()));
// Marking dll along with modified time and size in the
// registry happens at PlatformRegister(). No need to do it
// here again.
}
return NS_OK;
}
nsresult
nsNativeComponentLoader::RegisterDeferredComponents(PRInt32 aWhen,
PRBool *aRegistered)
{
#ifdef DEBUG
fprintf(stderr, "nNCL: registering deferred (%d)\n",
mDeferredComponents.Count());
#endif
*aRegistered = PR_FALSE;
if (!mDeferredComponents.Count())
return NS_OK;
for (int i = mDeferredComponents.Count() - 1; i >= 0; i--) {
nsDll *dll = NS_STATIC_CAST(nsDll *, mDeferredComponents[i]);
nsresult rv = SelfRegisterDll(dll,
dll->GetRegistryLocation(),
PR_TRUE);
if (rv != NS_ERROR_FACTORY_REGISTER_AGAIN) {
if (NS_SUCCEEDED(rv))
*aRegistered = PR_TRUE;
mDeferredComponents.RemoveElementAt(i);
}
}
#ifdef DEBUG
if (*aRegistered)
fprintf(stderr, "nNCL: registered deferred, %d left\n",
mDeferredComponents.Count());
else
fprintf(stderr, "nNCL: didn't register any components, %d left\n",
mDeferredComponents.Count());
#endif
/* are there any fatal errors? */
return NS_OK;
}
nsresult
nsNativeComponentLoader::OnRegister(const nsIID &aCID, const char *aType,
const char *aClassName,
const char *aContractID, const char *aLocation,
PRBool aReplace, PRBool aPersist)
{
return NS_OK;
}
nsresult
nsNativeComponentLoader::UnloadAll(PRInt32 aWhen)
{
PR_LOG(nsComponentManagerLog, PR_LOG_DEBUG, ("nsNativeComponentLoader: Unloading...."));
struct freeLibrariesClosure callData;
callData.serviceMgr = NULL; // XXX need to get this as a parameter
callData.when = aWhen;
// Cycle through the dlls checking to see if they want to be unloaded
if (mDllStore) {
mDllStore->Enumerate(nsFreeLibraryEnum, &callData);
}
return NS_OK;
}
//
// CreateDll
// The only way to create a dll or get it from the dll cache. This will
// be called in multiple situations:
//
// 1. Autoregister will create one for each dll it is trying to register. This
// call will be passing a spec in.
// {spec, NULL, 0, 0}
//
// 2. GetFactory() This will call CreateDll() with a null spec but will give
// the registry represented name of the dll. If modtime and size are zero,
// we will go the registry to find the right modtime and size.
// {NULL, rel:libpref.so, 0, 0}
//
// 3. Prepopulation of dllCache A dll object created off a registry entry.
// Specifically dll name is stored in rel: or abs: or lib: formats in the
// registry along with its lastModTime and fileSize.
// {NULL, rel:libpref.so, 8985659, 20987}
nsresult
nsNativeComponentLoader::CreateDll(nsIFile *aSpec,
const char *aLocation,
nsDll **aDll)
{
nsDll *dll;
nsCOMPtr<nsIFile> dllSpec;
nsCOMPtr<nsIFile> spec;
nsresult rv;
nsCStringKey key(aLocation);
dll = (nsDll *)mDllStore->Get(&key);
if (dll)
{
*aDll = dll;
return NS_OK;
}
if (!aSpec)
{
if (!nsCRT::strncmp(aLocation, XPCOM_LIB_PREFIX, 4)) {
dll = new nsDll(aLocation+4, 1 /* dumb magic flag */);
if (!dll) return NS_ERROR_OUT_OF_MEMORY;
} else {
// what I want to do here is QI for a Component Registration Manager. Since this
// has not been invented yet, QI to the obsolete manager. Kids, don't do this at home.
nsCOMPtr<nsIComponentManagerObsolete> obsoleteManager = do_QueryInterface(mCompMgr, &rv);
if (obsoleteManager)
rv = obsoleteManager->SpecForRegistryLocation(aLocation,
getter_AddRefs(spec));
if (NS_FAILED(rv))
return rv;
}
}
else
{
spec = aSpec;
}
if (!dll)
{
dll = new nsDll(spec, aLocation);
if (!dll)
return NS_ERROR_OUT_OF_MEMORY;
}
*aDll = dll;
mDllStore->Put(&key, dll);
return NS_OK;
}
nsresult
nsNativeComponentLoader::GetFactoryFromModule(nsDll *aDll, const nsCID &aCID,
nsIFactory **aFactory)
{
nsresult rv;
nsCOMPtr<nsIModule> module;
rv = aDll->GetModule(mCompMgr, getter_AddRefs(module));
if (NS_FAILED(rv))
return rv;
return module->GetClassObject(mCompMgr, aCID, NS_GET_IID(nsIFactory),
(void **)aFactory);
}
nsresult
nsNativeComponentLoader::GetFactoryFromNSGetFactory(nsDll *aDll,
const nsCID &aCID,
nsIServiceManager *aServMgr,
nsIFactory **aFactory)
{
return NS_ERROR_FACTORY_NOT_LOADED;
}
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