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authorwolfbeast <mcwerewolf@gmail.com>2018-02-09 08:11:38 +0100
committerwolfbeast <mcwerewolf@gmail.com>2018-02-09 08:51:28 +0100
commit8cd777888a40e987ad536ab68421068f5c06d83b (patch)
treed046b56471878f2531f4c741db076f1622e3365f /dom/asmjscache
parenta1a0b03046f68f4b0a22b9ec3086942551fbf469 (diff)
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Fix a rare crash with asm.js caching.
Diffstat (limited to 'dom/asmjscache')
-rw-r--r--dom/asmjscache/AsmJSCache.cpp336
1 files changed, 241 insertions, 95 deletions
diff --git a/dom/asmjscache/AsmJSCache.cpp b/dom/asmjscache/AsmJSCache.cpp
index 4e1912f23..be54987a1 100644
--- a/dom/asmjscache/AsmJSCache.cpp
+++ b/dom/asmjscache/AsmJSCache.cpp
@@ -69,6 +69,8 @@ namespace asmjscache {
namespace {
+class ParentRunnable;
+
// Anything smaller should compile fast enough that caching will just add
// overhead.
static const size_t sMinCachedModuleLength = 10000;
@@ -76,6 +78,10 @@ static const size_t sMinCachedModuleLength = 10000;
// The number of characters to hash into the Metadata::Entry::mFastHash.
static const unsigned sNumFastHashChars = 4096;
+// Track all live parent actors.
+typedef nsTArray<const ParentRunnable*> ParentActorArray;
+StaticAutoPtr<ParentActorArray> sLiveParentActors;
+
nsresult
WriteMetadataFile(nsIFile* aMetadataFile, const Metadata& aMetadata)
{
@@ -236,6 +242,94 @@ EvictEntries(nsIFile* aDirectory, const nsACString& aGroup,
}
}
+/*******************************************************************************
+ * Client
+ ******************************************************************************/
+
+class Client
+ : public quota::Client
+{
+ static Client* sInstance;
+
+ bool mShutdownRequested;
+
+public:
+ Client();
+
+ static bool
+ IsShuttingDownOnBackgroundThread()
+ {
+ AssertIsOnBackgroundThread();
+
+ if (sInstance) {
+ return sInstance->IsShuttingDown();
+ }
+
+ return QuotaManager::IsShuttingDown();
+ }
+
+ static bool
+ IsShuttingDownOnNonBackgroundThread()
+ {
+ MOZ_ASSERT(!IsOnBackgroundThread());
+
+ return QuotaManager::IsShuttingDown();
+ }
+
+ bool
+ IsShuttingDown() const
+ {
+ AssertIsOnBackgroundThread();
+
+ return mShutdownRequested;
+ }
+
+ NS_INLINE_DECL_REFCOUNTING(Client, override)
+
+ virtual Type
+ GetType() override;
+
+ virtual nsresult
+ InitOrigin(PersistenceType aPersistenceType,
+ const nsACString& aGroup,
+ const nsACString& aOrigin,
+ const AtomicBool& aCanceled,
+ UsageInfo* aUsageInfo) override;
+
+ virtual nsresult
+ GetUsageForOrigin(PersistenceType aPersistenceType,
+ const nsACString& aGroup,
+ const nsACString& aOrigin,
+ const AtomicBool& aCanceled,
+ UsageInfo* aUsageInfo) override;
+
+ virtual void
+ OnOriginClearCompleted(PersistenceType aPersistenceType,
+ const nsACString& aOrigin)
+ override;
+
+ virtual void
+ ReleaseIOThreadObjects() override;
+
+ virtual void
+ AbortOperations(const nsACString& aOrigin) override;
+
+ virtual void
+ AbortOperationsForProcess(ContentParentId aContentParentId) override;
+
+ virtual void
+ StartIdleMaintenance() override;
+
+ virtual void
+ StopIdleMaintenance() override;
+
+ virtual void
+ ShutdownWorkThreads() override;
+
+private:
+ ~Client();
+};
+
// FileDescriptorHolder owns a file descriptor and its memory mapping.
// FileDescriptorHolder is derived by two runnable classes (that is,
// (Parent|Child)Runnable.
@@ -897,6 +991,13 @@ ParentRunnable::FinishOnOwningThread()
FileDescriptorHolder::Finish();
mDirectoryLock = nullptr;
+
+ MOZ_ASSERT(sLiveParentActors);
+ sLiveParentActors->RemoveElement(this);
+
+ if (sLiveParentActors->IsEmpty()) {
+ sLiveParentActors = nullptr;
+ }
}
NS_IMETHODIMP
@@ -1140,6 +1241,10 @@ AllocEntryParent(OpenMode aOpenMode,
{
AssertIsOnBackgroundThread();
+ if (NS_WARN_IF(Client::IsShuttingDownOnBackgroundThread())) {
+ return nullptr;
+ }
+
if (NS_WARN_IF(aPrincipalInfo.type() == PrincipalInfo::TNullPrincipalInfo)) {
MOZ_ASSERT(false);
return nullptr;
@@ -1148,6 +1253,12 @@ AllocEntryParent(OpenMode aOpenMode,
RefPtr<ParentRunnable> runnable =
new ParentRunnable(aPrincipalInfo, aOpenMode, aWriteParams);
+ if (!sLiveParentActors) {
+ sLiveParentActors = new ParentActorArray();
+ }
+
+ sLiveParentActors->AppendElement(runnable);
+
nsresult rv = NS_DispatchToMainThread(runnable);
NS_ENSURE_SUCCESS(rv, nullptr);
@@ -1712,128 +1823,163 @@ CloseEntryForWrite(size_t aSize,
}
}
-class Client : public quota::Client
+/*******************************************************************************
+ * Client
+ ******************************************************************************/
+
+Client* Client::sInstance = nullptr;
+
+Client::Client()
+ : mShutdownRequested(false)
{
- ~Client() {}
+ AssertIsOnBackgroundThread();
+ MOZ_ASSERT(!sInstance, "We expect this to be a singleton!");
-public:
- NS_IMETHOD_(MozExternalRefCountType)
- AddRef() override;
+ sInstance = this;
+}
- NS_IMETHOD_(MozExternalRefCountType)
- Release() override;
+Client::~Client()
+{
+ AssertIsOnBackgroundThread();
+ MOZ_ASSERT(sInstance == this, "We expect this to be a singleton!");
- virtual Type
- GetType() override
- {
- return ASMJS;
- }
+ sInstance = nullptr;
+}
- virtual nsresult
- InitOrigin(PersistenceType aPersistenceType,
- const nsACString& aGroup,
- const nsACString& aOrigin,
- const AtomicBool& aCanceled,
- UsageInfo* aUsageInfo) override
- {
- if (!aUsageInfo) {
- return NS_OK;
- }
- return GetUsageForOrigin(aPersistenceType,
- aGroup,
- aOrigin,
- aCanceled,
- aUsageInfo);
- }
+Client::Type
+Client::GetType()
+{
+ return ASMJS;
+}
- virtual nsresult
- GetUsageForOrigin(PersistenceType aPersistenceType,
- const nsACString& aGroup,
- const nsACString& aOrigin,
- const AtomicBool& aCanceled,
- UsageInfo* aUsageInfo) override
- {
- QuotaManager* qm = QuotaManager::Get();
- MOZ_ASSERT(qm, "We were being called by the QuotaManager");
+nsresult
+Client::InitOrigin(PersistenceType aPersistenceType,
+ const nsACString& aGroup,
+ const nsACString& aOrigin,
+ const AtomicBool& aCanceled,
+ UsageInfo* aUsageInfo)
+{
+ if (!aUsageInfo) {
+ return NS_OK;
+ }
+ return GetUsageForOrigin(aPersistenceType,
+ aGroup,
+ aOrigin,
+ aCanceled,
+ aUsageInfo);
+}
- nsCOMPtr<nsIFile> directory;
- nsresult rv = qm->GetDirectoryForOrigin(aPersistenceType, aOrigin,
- getter_AddRefs(directory));
- NS_ENSURE_SUCCESS(rv, rv);
- MOZ_ASSERT(directory, "We're here because the origin directory exists");
+nsresult
+Client::GetUsageForOrigin(PersistenceType aPersistenceType,
+ const nsACString& aGroup,
+ const nsACString& aOrigin,
+ const AtomicBool& aCanceled,
+ UsageInfo* aUsageInfo)
+{
+ QuotaManager* qm = QuotaManager::Get();
+ MOZ_ASSERT(qm, "We were being called by the QuotaManager");
- rv = directory->Append(NS_LITERAL_STRING(ASMJSCACHE_DIRECTORY_NAME));
- NS_ENSURE_SUCCESS(rv, rv);
+ nsCOMPtr<nsIFile> directory;
+ nsresult rv = qm->GetDirectoryForOrigin(aPersistenceType, aOrigin,
+ getter_AddRefs(directory));
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
+ }
- DebugOnly<bool> exists;
- MOZ_ASSERT(NS_SUCCEEDED(directory->Exists(&exists)) && exists);
+ MOZ_ASSERT(directory, "We're here because the origin directory exists");
- nsCOMPtr<nsISimpleEnumerator> entries;
- rv = directory->GetDirectoryEntries(getter_AddRefs(entries));
- NS_ENSURE_SUCCESS(rv, rv);
+ rv = directory->Append(NS_LITERAL_STRING(ASMJSCACHE_DIRECTORY_NAME));
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
+ }
- bool hasMore;
- while (NS_SUCCEEDED((rv = entries->HasMoreElements(&hasMore))) &&
- hasMore && !aCanceled) {
- nsCOMPtr<nsISupports> entry;
- rv = entries->GetNext(getter_AddRefs(entry));
- NS_ENSURE_SUCCESS(rv, rv);
+ DebugOnly<bool> exists;
+ MOZ_ASSERT(NS_SUCCEEDED(directory->Exists(&exists)) && exists);
- nsCOMPtr<nsIFile> file = do_QueryInterface(entry);
- NS_ENSURE_TRUE(file, NS_NOINTERFACE);
+ nsCOMPtr<nsISimpleEnumerator> entries;
+ rv = directory->GetDirectoryEntries(getter_AddRefs(entries));
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
+ }
- int64_t fileSize;
- rv = file->GetFileSize(&fileSize);
- NS_ENSURE_SUCCESS(rv, rv);
+ bool hasMore;
+ while (NS_SUCCEEDED((rv = entries->HasMoreElements(&hasMore))) &&
+ hasMore && !aCanceled) {
+ nsCOMPtr<nsISupports> entry;
+ rv = entries->GetNext(getter_AddRefs(entry));
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
+ }
- MOZ_ASSERT(fileSize >= 0, "Negative size?!");
+ nsCOMPtr<nsIFile> file = do_QueryInterface(entry);
+ if (NS_WARN_IF(!file)) {
+ return NS_NOINTERFACE;
+ }
- // Since the client is not explicitly storing files, append to database
- // usage which represents implicit storage allocation.
- aUsageInfo->AppendToDatabaseUsage(uint64_t(fileSize));
+ int64_t fileSize;
+ rv = file->GetFileSize(&fileSize);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
}
- NS_ENSURE_SUCCESS(rv, rv);
- return NS_OK;
+ MOZ_ASSERT(fileSize >= 0, "Negative size?!");
+
+ // Since the client is not explicitly storing files, append to database
+ // usage which represents implicit storage allocation.
+ aUsageInfo->AppendToDatabaseUsage(uint64_t(fileSize));
+ }
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
}
- virtual void
- OnOriginClearCompleted(PersistenceType aPersistenceType,
- const nsACString& aOrigin)
- override
- { }
+ return NS_OK;
+}
- virtual void
- ReleaseIOThreadObjects() override
- { }
+void
+Client::OnOriginClearCompleted(PersistenceType aPersistenceType,
+ const nsACString& aOrigin)
+{
+}
- virtual void
- AbortOperations(const nsACString& aOrigin) override
- { }
+void
+Client::ReleaseIOThreadObjects()
+{
+}
- virtual void
- AbortOperationsForProcess(ContentParentId aContentParentId) override
- { }
+void
+Client::AbortOperations(const nsACString& aOrigin)
+{
+}
- virtual void
- StartIdleMaintenance() override
- { }
+void
+Client::AbortOperationsForProcess(ContentParentId aContentParentId)
+{
+}
- virtual void
- StopIdleMaintenance() override
- { }
+void
+Client::StartIdleMaintenance()
+{
+}
- virtual void
- ShutdownWorkThreads() override
- { }
+void
+Client::StopIdleMaintenance()
+{
+}
-private:
- nsAutoRefCnt mRefCnt;
- NS_DECL_OWNINGTHREAD
-};
+void
+Client::ShutdownWorkThreads()
+{
+ AssertIsOnBackgroundThread();
+
+ if (sLiveParentActors) {
+ nsIThread* currentThread = NS_GetCurrentThread();
+ MOZ_ASSERT(currentThread);
-NS_IMPL_ADDREF(asmjscache::Client)
-NS_IMPL_RELEASE(asmjscache::Client)
+ do {
+ MOZ_ALWAYS_TRUE(NS_ProcessNextEvent(currentThread));
+ } while (!sLiveParentActors);
+ }
+}
quota::Client*
CreateClient()