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nsComponentManager.cpp
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 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 <stdlib.h>
#include "nscore.h"
#include "nsISupports.h"
#include "nspr.h"
#include "nsCRT.h" // for atoll
// Arena used by component manager for storing contractid string, dll
// location strings and small objects
// CAUTION: Arena align mask needs to be defined before including plarena.h
// currently from nsComponentManager.h
#define PL_ARENA_CONST_ALIGN_MASK 7
#define NS_CM_BLOCK_SIZE (1024 * 8)
#include "nsCategoryManager.h"
#include "nsCOMPtr.h"
#include "nsComponentManager.h"
#include "nsDirectoryService.h"
#include "nsDirectoryServiceDefs.h"
#include "nsCategoryManager.h"
#include "nsCategoryManagerUtils.h"
#include "xptiprivate.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/XPTInterfaceInfoManager.h"
#include "nsIConsoleService.h"
#include "nsIObserverService.h"
#include "nsISimpleEnumerator.h"
#include "nsIStringEnumerator.h"
#include "nsXPCOM.h"
#include "nsXPCOMPrivate.h"
#include "nsISupportsPrimitives.h"
#include "nsIClassInfo.h"
#include "nsLocalFile.h"
#include "nsReadableUtils.h"
#include "nsString.h"
#include "nsXPIDLString.h"
#include "prcmon.h"
#include "xptinfo.h" // this after nsISupports, to pick up IID so that xpt stuff doesn't try to define it itself...
#include "nsThreadUtils.h"
#include "prthread.h"
#include "private/pprthred.h"
#include "nsTArray.h"
#include "prio.h"
#include "ManifestParser.h"
#include "nsNetUtil.h"
#include "mozilla/Services.h"
#include "mozilla/GenericFactory.h"
#include "nsSupportsPrimitives.h"
#include "nsArray.h"
#include "nsIMutableArray.h"
#include "nsArrayEnumerator.h"
#include "nsStringEnumerator.h"
#include "mozilla/FileUtils.h"
#include "mozilla/UniquePtr.h"
#include "nsDataHashtable.h"
#include <new> // for placement new
#include "mozilla/Omnijar.h"
#include "mozilla/Logging.h"
#include "LogModulePrefWatcher.h"
using namespace mozilla;
static LazyLogModule nsComponentManagerLog("nsComponentManager");
#if 0 || defined (DEBUG_timeless)
#define SHOW_DENIED_ON_SHUTDOWN
#define SHOW_CI_ON_EXISTING_SERVICE
#endif
// Bloated registry buffer size to improve startup performance -- needs to
// be big enough to fit the entire file into memory or it'll thrash.
// 512K is big enough to allow for some future growth in the registry.
#define BIG_REGISTRY_BUFLEN (512*1024)
// Common Key Names
const char xpcomComponentsKeyName[] = "software/mozilla/XPCOM/components";
const char xpcomKeyName[] = "software/mozilla/XPCOM";
// Common Value Names
const char fileSizeValueName[] = "FileSize";
const char lastModValueName[] = "LastModTimeStamp";
const char nativeComponentType[] = "application/x-mozilla-native";
const char staticComponentType[] = "application/x-mozilla-static";
NS_DEFINE_CID(kCategoryManagerCID, NS_CATEGORYMANAGER_CID);
#define UID_STRING_LENGTH 39
#ifdef MOZ_B2G_LOADER
typedef nsDataHashtable<nsCStringHashKey, bool> XPTIInfosBookType;
static XPTIInfosBookType* sXPTIInfosBook = nullptr;
static XPTIInfosBookType*
GetXPTIInfosBook()
{
if (!sXPTIInfosBook) {
sXPTIInfosBook = new XPTIInfosBookType;
}
return sXPTIInfosBook;
}
static bool
IsRegisteredXPTIInfo(FileLocation& aFile)
{
nsAutoCString uri;
aFile.GetURIString(uri);
return GetXPTIInfosBook()->Get(uri);
}
static void
MarkRegisteredXPTIInfo(FileLocation& aFile)
{
nsAutoCString uri;
aFile.GetURIString(uri);
GetXPTIInfosBook()->Put(uri, true);
}
#endif /* MOZ_B2G_LOADER */
nsresult
nsGetServiceFromCategory::operator()(const nsIID& aIID,
void** aInstancePtr) const
{
nsresult rv;
nsXPIDLCString value;
nsCOMPtr<nsICategoryManager> catman;
nsComponentManagerImpl* compMgr = nsComponentManagerImpl::gComponentManager;
if (!compMgr) {
rv = NS_ERROR_NOT_INITIALIZED;
goto error;
}
if (!mCategory || !mEntry) {
// when categories have defaults, use that for null mEntry
rv = NS_ERROR_NULL_POINTER;
goto error;
}
rv = compMgr->nsComponentManagerImpl::GetService(kCategoryManagerCID,
NS_GET_IID(nsICategoryManager),
getter_AddRefs(catman));
if (NS_FAILED(rv)) {
goto error;
}
/* find the contractID for category.entry */
rv = catman->GetCategoryEntry(mCategory, mEntry,
getter_Copies(value));
if (NS_FAILED(rv)) {
goto error;
}
if (!value) {
rv = NS_ERROR_SERVICE_NOT_AVAILABLE;
goto error;
}
rv = compMgr->nsComponentManagerImpl::GetServiceByContractID(value,
aIID,
aInstancePtr);
if (NS_FAILED(rv)) {
error:
*aInstancePtr = 0;
}
if (mErrorPtr) {
*mErrorPtr = rv;
}
return rv;
}
////////////////////////////////////////////////////////////////////////////////
// Arena helper functions
////////////////////////////////////////////////////////////////////////////////
char*
ArenaStrndup(const char* aStr, uint32_t aLen, PLArenaPool* aArena)
{
void* mem;
// Include trailing null in the aLen
PL_ARENA_ALLOCATE(mem, aArena, aLen + 1);
if (mem) {
memcpy(mem, aStr, aLen + 1);
}
return static_cast<char*>(mem);
}
char*
ArenaStrdup(const char* aStr, PLArenaPool* aArena)
{
return ArenaStrndup(aStr, strlen(aStr), aArena);
}
// GetService and a few other functions need to exit their mutex mid-function
// without reentering it later in the block. This class supports that
// style of early-exit that MutexAutoUnlock doesn't.
namespace {
class MOZ_STACK_CLASS MutexLock
{
public:
explicit MutexLock(SafeMutex& aMutex)
: mMutex(aMutex)
, mLocked(false)
{
Lock();
}
~MutexLock()
{
if (mLocked) {
Unlock();
}
}
void Lock()
{
NS_ASSERTION(!mLocked, "Re-entering a mutex");
mMutex.Lock();
mLocked = true;
}
void Unlock()
{
NS_ASSERTION(mLocked, "Exiting a mutex that isn't held!");
mMutex.Unlock();
mLocked = false;
}
private:
SafeMutex& mMutex;
bool mLocked;
};
} // namespace
// this is safe to call during InitXPCOM
static already_AddRefed<nsIFile>
GetLocationFromDirectoryService(const char* aProp)
{
nsCOMPtr<nsIProperties> directoryService;
nsDirectoryService::Create(nullptr,
NS_GET_IID(nsIProperties),
getter_AddRefs(directoryService));
if (!directoryService) {
return nullptr;
}
nsCOMPtr<nsIFile> file;
nsresult rv = directoryService->Get(aProp,
NS_GET_IID(nsIFile),
getter_AddRefs(file));
if (NS_FAILED(rv)) {
return nullptr;
}
return file.forget();
}
static already_AddRefed<nsIFile>
CloneAndAppend(nsIFile* aBase, const nsACString& aAppend)
{
nsCOMPtr<nsIFile> f;
aBase->Clone(getter_AddRefs(f));
if (!f) {
return nullptr;
}
f->AppendNative(aAppend);
return f.forget();
}
////////////////////////////////////////////////////////////////////////////////
// nsComponentManagerImpl
////////////////////////////////////////////////////////////////////////////////
nsresult
nsComponentManagerImpl::Create(nsISupports* aOuter, REFNSIID aIID,
void** aResult)
{
if (aOuter) {
return NS_ERROR_NO_AGGREGATION;
}
if (!gComponentManager) {
return NS_ERROR_FAILURE;
}
return gComponentManager->QueryInterface(aIID, aResult);
}
static const int CONTRACTID_HASHTABLE_INITIAL_LENGTH = 1024;
nsComponentManagerImpl::nsComponentManagerImpl()
: mFactories(CONTRACTID_HASHTABLE_INITIAL_LENGTH)
, mContractIDs(CONTRACTID_HASHTABLE_INITIAL_LENGTH)
, mLock("nsComponentManagerImpl.mLock")
, mStatus(NOT_INITIALIZED)
{
}
nsTArray<const mozilla::Module*>* nsComponentManagerImpl::sStaticModules;
NSMODULE_DEFN(start_kPStaticModules);
NSMODULE_DEFN(end_kPStaticModules);
/* The content between start_kPStaticModules and end_kPStaticModules is gathered
* by the linker from various objects containing symbols in a specific section.
* ASAN considers (rightfully) the use of this content as a global buffer
* overflow. But this is a deliberate and well-considered choice, with no proper
* way to make ASAN happy. */
MOZ_ASAN_BLACKLIST
/* static */ void
nsComponentManagerImpl::InitializeStaticModules()
{
if (sStaticModules) {
return;
}
sStaticModules = new nsTArray<const mozilla::Module*>;
for (const mozilla::Module * const* staticModules =
&NSMODULE_NAME(start_kPStaticModules) + 1;
staticModules < &NSMODULE_NAME(end_kPStaticModules); ++staticModules)
if (*staticModules) { // ASAN adds padding
sStaticModules->AppendElement(*staticModules);
}
}
nsTArray<nsComponentManagerImpl::ComponentLocation>*
nsComponentManagerImpl::sModuleLocations;
/* static */ void
nsComponentManagerImpl::InitializeModuleLocations()
{
if (sModuleLocations) {
return;
}
sModuleLocations = new nsTArray<ComponentLocation>;
}
nsresult
nsComponentManagerImpl::Init()
{
PR_ASSERT(NOT_INITIALIZED == mStatus);
// Initialize our arena
PL_INIT_ARENA_POOL(&mArena, "ComponentManagerArena", NS_CM_BLOCK_SIZE);
nsCOMPtr<nsIFile> greDir =
GetLocationFromDirectoryService(NS_GRE_DIR);
nsCOMPtr<nsIFile> appDir =
GetLocationFromDirectoryService(NS_XPCOM_CURRENT_PROCESS_DIR);
InitializeStaticModules();
nsresult rv = mNativeModuleLoader.Init();
if (NS_FAILED(rv)) {
return rv;
}
nsCategoryManager::GetSingleton()->SuppressNotifications(true);
RegisterModule(&kXPCOMModule, nullptr);
for (uint32_t i = 0; i < sStaticModules->Length(); ++i) {
RegisterModule((*sStaticModules)[i], nullptr);
}
// The overall order in which chrome.manifests are expected to be treated
// is the following:
// - greDir
// - greDir's omni.ja
// - appDir
// - appDir's omni.ja
InitializeModuleLocations();
ComponentLocation* cl = sModuleLocations->AppendElement();
nsCOMPtr<nsIFile> lf = CloneAndAppend(greDir,
NS_LITERAL_CSTRING("chrome.manifest"));
cl->type = NS_APP_LOCATION;
cl->location.Init(lf);
RefPtr<nsZipArchive> greOmnijar =
mozilla::Omnijar::GetReader(mozilla::Omnijar::GRE);
if (greOmnijar) {
cl = sModuleLocations->AppendElement();
cl->type = NS_APP_LOCATION;
cl->location.Init(greOmnijar, "chrome.manifest");
}
bool equals = false;
appDir->Equals(greDir, &equals);
if (!equals) {
cl = sModuleLocations->AppendElement();
cl->type = NS_APP_LOCATION;
lf = CloneAndAppend(appDir, NS_LITERAL_CSTRING("chrome.manifest"));
cl->location.Init(lf);
}
RefPtr<nsZipArchive> appOmnijar =
mozilla::Omnijar::GetReader(mozilla::Omnijar::APP);
if (appOmnijar) {
cl = sModuleLocations->AppendElement();
cl->type = NS_APP_LOCATION;
cl->location.Init(appOmnijar, "chrome.manifest");
}
RereadChromeManifests(false);
nsCategoryManager::GetSingleton()->SuppressNotifications(false);
RegisterWeakMemoryReporter(this);
// NB: The logging preference watcher needs to be registered late enough in
// startup that it's okay to use the preference system, but also as soon as
// possible so that log modules enabled via preferences are turned on as
// early as possible.
//
// We can't initialize the preference watcher when the log module manager is
// initialized, as a number of things attempt to start logging before the
// preference system is initialized.
//
// The preference system is registered as a component so at this point during
// component manager initialization we know it is setup and we can register
// for notifications.
LogModulePrefWatcher::RegisterPrefWatcher();
// Unfortunately, we can't register the nsCategoryManager memory reporter
// in its constructor (which is triggered by the GetSingleton() call
// above) because the memory reporter manager isn't initialized at that
// point. So we wait until now.
nsCategoryManager::GetSingleton()->InitMemoryReporter();
MOZ_LOG(nsComponentManagerLog, LogLevel::Debug,
("nsComponentManager: Initialized."));
mStatus = NORMAL;
return NS_OK;
}
void
nsComponentManagerImpl::RegisterModule(const mozilla::Module* aModule,
FileLocation* aFile)
{
mLock.AssertNotCurrentThreadOwns();
{
// Scope the monitor so that we don't hold it while calling into the
// category manager.
MutexLock lock(mLock);
KnownModule* m;
if (aFile) {
nsCString uri;
aFile->GetURIString(uri);
NS_ASSERTION(!mKnownModules.Get(uri),
"Must not register a binary module twice.");
m = new KnownModule(aModule, *aFile);
mKnownModules.Put(uri, m);
} else {
m = new KnownModule(aModule);
mKnownStaticModules.AppendElement(m);
}
if (aModule->mCIDs) {
const mozilla::Module::CIDEntry* entry;
for (entry = aModule->mCIDs; entry->cid; ++entry) {
RegisterCIDEntryLocked(entry, m);
}
}
if (aModule->mContractIDs) {
const mozilla::Module::ContractIDEntry* entry;
for (entry = aModule->mContractIDs; entry->contractid; ++entry) {
RegisterContractIDLocked(entry);
}
MOZ_ASSERT(!entry->cid, "Incorrectly terminated contract list");
}
}
if (aModule->mCategoryEntries) {
const mozilla::Module::CategoryEntry* entry;
for (entry = aModule->mCategoryEntries; entry->category; ++entry)
nsCategoryManager::GetSingleton()->AddCategoryEntry(entry->category,
entry->entry,
entry->value);
}
}
static bool
ProcessSelectorMatches(Module::ProcessSelector aSelector)
{
if (aSelector == Module::ANY_PROCESS) {
return true;
}
GeckoProcessType type = XRE_GetProcessType();
switch (aSelector) {
case Module::MAIN_PROCESS_ONLY:
return type == GeckoProcessType_Default;
case Module::CONTENT_PROCESS_ONLY:
return type == GeckoProcessType_Content;
default:
MOZ_CRASH("invalid process aSelector");
}
}
void
nsComponentManagerImpl::RegisterCIDEntryLocked(
const mozilla::Module::CIDEntry* aEntry,
KnownModule* aModule)
{
mLock.AssertCurrentThreadOwns();
if (!ProcessSelectorMatches(aEntry->processSelector)) {
return;
}
nsFactoryEntry* f = mFactories.Get(*aEntry->cid);
if (f) {
NS_WARNING("Re-registering a CID?");
char idstr[NSID_LENGTH];
aEntry->cid->ToProvidedString(idstr);
nsCString existing;
if (f->mModule) {
existing = f->mModule->Description();
} else {
existing = "<unknown module>";
}
SafeMutexAutoUnlock unlock(mLock);
LogMessage("While registering XPCOM module %s, trying to re-register CID '%s' already registered by %s.",
aModule->Description().get(),
idstr,
existing.get());
return;
}
f = new nsFactoryEntry(aEntry, aModule);
mFactories.Put(*aEntry->cid, f);
}
void
nsComponentManagerImpl::RegisterContractIDLocked(
const mozilla::Module::ContractIDEntry* aEntry)
{
mLock.AssertCurrentThreadOwns();
if (!ProcessSelectorMatches(aEntry->processSelector)) {
return;
}
nsFactoryEntry* f = mFactories.Get(*aEntry->cid);
if (!f) {
NS_WARNING("No CID found when attempting to map contract ID");
char idstr[NSID_LENGTH];
aEntry->cid->ToProvidedString(idstr);
SafeMutexAutoUnlock unlock(mLock);
LogMessage("Could not map contract ID '%s' to CID %s because no implementation of the CID is registered.",
aEntry->contractid,
idstr);
return;
}
mContractIDs.Put(nsDependentCString(aEntry->contractid), f);
}
static void
CutExtension(nsCString& aPath)
{
int32_t dotPos = aPath.RFindChar('.');
if (kNotFound == dotPos) {
aPath.Truncate();
} else {
aPath.Cut(0, dotPos + 1);
}
}
static void
DoRegisterManifest(NSLocationType aType,
FileLocation& aFile,
bool aChromeOnly,
bool aXPTOnly)
{
MOZ_ASSERT(!aXPTOnly || !nsComponentManagerImpl::gComponentManager);
uint32_t len;
FileLocation::Data data;
UniquePtr<char[]> buf;
nsresult rv = aFile.GetData(data);
if (NS_SUCCEEDED(rv)) {
rv = data.GetSize(&len);
}
if (NS_SUCCEEDED(rv)) {
buf = MakeUnique<char[]>(len + 1);
rv = data.Copy(buf.get(), len);
}
if (NS_SUCCEEDED(rv)) {
buf[len] = '\0';
ParseManifest(aType, aFile, buf.get(), aChromeOnly, aXPTOnly);
} else if (NS_BOOTSTRAPPED_LOCATION != aType) {
nsCString uri;
aFile.GetURIString(uri);
LogMessage("Could not read chrome manifest '%s'.", uri.get());
}
}
void
nsComponentManagerImpl::RegisterManifest(NSLocationType aType,
FileLocation& aFile,
bool aChromeOnly)
{
DoRegisterManifest(aType, aFile, aChromeOnly, false);
}
void
nsComponentManagerImpl::ManifestManifest(ManifestProcessingContext& aCx,
int aLineNo, char* const* aArgv)
{
char* file = aArgv[0];
FileLocation f(aCx.mFile, file);
RegisterManifest(aCx.mType, f, aCx.mChromeOnly);
}
void
nsComponentManagerImpl::ManifestBinaryComponent(ManifestProcessingContext& aCx,
int aLineNo,
char* const* aArgv)
{
if (aCx.mFile.IsZip()) {
NS_WARNING("Cannot load binary components from a jar.");
LogMessageWithContext(aCx.mFile, aLineNo,
"Cannot load binary components from a jar.");
return;
}
FileLocation f(aCx.mFile, aArgv[0]);
nsCString uri;
f.GetURIString(uri);
if (mKnownModules.Get(uri)) {
NS_WARNING("Attempting to register a binary component twice.");
LogMessageWithContext(aCx.mFile, aLineNo,
"Attempting to register a binary component twice.");
return;
}
const mozilla::Module* m = mNativeModuleLoader.LoadModule(f);
// The native module loader should report an error here, we don't have to
if (!m) {
return;
}
RegisterModule(m, &f);
}
static void
DoRegisterXPT(FileLocation& aFile)
{
#ifdef MOZ_B2G_LOADER
if (IsRegisteredXPTIInfo(aFile)) {
return;
}
#endif
uint32_t len;
FileLocation::Data data;
UniquePtr<char[]> buf;
nsresult rv = aFile.GetData(data);
if (NS_SUCCEEDED(rv)) {
rv = data.GetSize(&len);
}
if (NS_SUCCEEDED(rv)) {
buf = MakeUnique<char[]>(len);
rv = data.Copy(buf.get(), len);
}
if (NS_SUCCEEDED(rv)) {
XPTInterfaceInfoManager::GetSingleton()->RegisterBuffer(buf.get(), len);
#ifdef MOZ_B2G_LOADER
MarkRegisteredXPTIInfo(aFile);
#endif
} else {
nsCString uri;
aFile.GetURIString(uri);
LogMessage("Could not read '%s'.", uri.get());
}
}
void
nsComponentManagerImpl::ManifestXPT(ManifestProcessingContext& aCx,
int aLineNo, char* const* aArgv)
{
FileLocation f(aCx.mFile, aArgv[0]);
DoRegisterXPT(f);
}
void
nsComponentManagerImpl::ManifestComponent(ManifestProcessingContext& aCx,
int aLineNo, char* const* aArgv)
{
mLock.AssertNotCurrentThreadOwns();
char* id = aArgv[0];
char* file = aArgv[1];
nsID cid;
if (!cid.Parse(id)) {
LogMessageWithContext(aCx.mFile, aLineNo,
"Malformed CID: '%s'.", id);
return;
}
// Precompute the hash/file data outside of the lock
FileLocation fl(aCx.mFile, file);
nsCString hash;
fl.GetURIString(hash);
MutexLock lock(mLock);
nsFactoryEntry* f = mFactories.Get(cid);
if (f) {
char idstr[NSID_LENGTH];
cid.ToProvidedString(idstr);
nsCString existing;
if (f->mModule) {
existing = f->mModule->Description();
} else {
existing = "<unknown module>";
}
lock.Unlock();
LogMessageWithContext(aCx.mFile, aLineNo,
"Trying to re-register CID '%s' already registered by %s.",
idstr,
existing.get());
return;
}
KnownModule* km;
km = mKnownModules.Get(hash);
if (!km) {
km = new KnownModule(fl);
mKnownModules.Put(hash, km);
}
void* place;
PL_ARENA_ALLOCATE(place, &mArena, sizeof(nsCID));
nsID* permanentCID = static_cast<nsID*>(place);
*permanentCID = cid;
PL_ARENA_ALLOCATE(place, &mArena, sizeof(mozilla::Module::CIDEntry));
mozilla::Module::CIDEntry* e = new (place) mozilla::Module::CIDEntry();
e->cid = permanentCID;
f = new nsFactoryEntry(e, km);
mFactories.Put(cid, f);
}
void
nsComponentManagerImpl::ManifestContract(ManifestProcessingContext& aCx,
int aLineNo, char* const* aArgv)
{
mLock.AssertNotCurrentThreadOwns();
char* contract = aArgv[0];
char* id = aArgv[1];
nsID cid;
if (!cid.Parse(id)) {
LogMessageWithContext(aCx.mFile, aLineNo,
"Malformed CID: '%s'.", id);
return;
}
MutexLock lock(mLock);
nsFactoryEntry* f = mFactories.Get(cid);
if (!f) {
lock.Unlock();
LogMessageWithContext(aCx.mFile, aLineNo,
"Could not map contract ID '%s' to CID %s because no implementation of the CID is registered.",
contract, id);
return;
}
mContractIDs.Put(nsDependentCString(contract), f);
}
void
nsComponentManagerImpl::ManifestCategory(ManifestProcessingContext& aCx,
int aLineNo, char* const* aArgv)
{
char* category = aArgv[0];
char* key = aArgv[1];
char* value = aArgv[2];
nsCategoryManager::GetSingleton()->
AddCategoryEntry(category, key, value);
}
void
nsComponentManagerImpl::RereadChromeManifests(bool aChromeOnly)
{
for (uint32_t i = 0; i < sModuleLocations->Length(); ++i) {
ComponentLocation& l = sModuleLocations->ElementAt(i);
RegisterManifest(l.type, l.location, aChromeOnly);
}
}
bool
nsComponentManagerImpl::KnownModule::EnsureLoader()
{
if (!mLoader) {
nsCString extension;
mFile.GetURIString(extension);
CutExtension(extension);
mLoader =
nsComponentManagerImpl::gComponentManager->LoaderForExtension(extension);
}
return !!mLoader;
}
bool
nsComponentManagerImpl::KnownModule::Load()
{
if (mFailed) {
return false;
}
if (!mModule) {
if (!EnsureLoader()) {
return false;
}
mModule = mLoader->LoadModule(mFile);
if (!mModule) {
mFailed = true;
return false;
}
}
if (!mLoaded) {
if (mModule->loadProc) {
nsresult rv = mModule->loadProc();
if (NS_FAILED(rv)) {
mFailed = true;
return false;
}
}
mLoaded = true;
}
return true;
}
nsCString
nsComponentManagerImpl::KnownModule::Description() const
{
nsCString s;
if (mFile) {
mFile.GetURIString(s);
} else {
s = "<static module>";
}
return s;
}
nsresult nsComponentManagerImpl::Shutdown(void)
{
PR_ASSERT(NORMAL == mStatus);
mStatus = SHUTDOWN_IN_PROGRESS;
// Shutdown the component manager
MOZ_LOG(nsComponentManagerLog, LogLevel::Debug,
("nsComponentManager: Beginning Shutdown."));
UnregisterWeakMemoryReporter(this);
// Release all cached factories
mContractIDs.Clear();
mFactories.Clear(); // XXX release the objects, don't just clear
mLoaderMap.Clear();
mKnownModules.Clear();
mKnownStaticModules.Clear();
delete sStaticModules;
delete sModuleLocations;
#ifdef MOZ_B2G_LOADER
delete sXPTIInfosBook;
sXPTIInfosBook = nullptr;
#endif
// Unload libraries
mNativeModuleLoader.UnloadLibraries();
// delete arena for strings and small objects
PL_FinishArenaPool(&mArena);
mStatus = SHUTDOWN_COMPLETE;
MOZ_LOG(nsComponentManagerLog, LogLevel::Debug,
("nsComponentManager: Shutdown complete."));
return NS_OK;
}
nsComponentManagerImpl::~nsComponentManagerImpl()
{
MOZ_LOG(nsComponentManagerLog, LogLevel::Debug,
("nsComponentManager: Beginning destruction."));
if (SHUTDOWN_COMPLETE != mStatus) {
Shutdown();
}
MOZ_LOG(nsComponentManagerLog, LogLevel::Debug,
("nsComponentManager: Destroyed."));
}
NS_IMPL_ISUPPORTS(nsComponentManagerImpl,
nsIComponentManager,
nsIServiceManager,
nsIComponentRegistrar,
nsISupportsWeakReference,
nsIInterfaceRequestor,
nsIMemoryReporter)
nsresult
nsComponentManagerImpl::GetInterface(const nsIID& aUuid, void** aResult)
{
NS_WARNING("This isn't supported");
// fall through to QI as anything QIable is a superset of what can be
// got via the GetInterface()
return QueryInterface(aUuid, aResult);
}
nsFactoryEntry*
nsComponentManagerImpl::GetFactoryEntry(const char* aContractID,
uint32_t aContractIDLen)
{
SafeMutexAutoLock lock(mLock);
return mContractIDs.Get(nsDependentCString(aContractID, aContractIDLen));
}
nsFactoryEntry*
nsComponentManagerImpl::GetFactoryEntry(const nsCID& aClass)
{
SafeMutexAutoLock lock(mLock);
return mFactories.Get(aClass);
}
already_AddRefed<nsIFactory>
nsComponentManagerImpl::FindFactory(const nsCID& aClass)
{
nsFactoryEntry* e = GetFactoryEntry(aClass);
if (!e) {
return nullptr;
}
return e->GetFactory();
}
already_AddRefed<nsIFactory>
nsComponentManagerImpl::FindFactory(const char* aContractID,
uint32_t aContractIDLen)
{
nsFactoryEntry* entry = GetFactoryEntry(aContractID, aContractIDLen);
if (!entry) {
return nullptr;
}
return entry->GetFactory();
}