Add m-esr52 at 52.6.0

1 files changed, 436 insertions, 0 deletions

diff --git a/dom/base/nsScriptNameSpaceManager.cpp b/dom/base/nsScriptNameSpaceManager.cpp
new file mode 100644
index 000000000..6003a1fc1
--- /dev/null
+++ b/dom/base/nsScriptNameSpaceManager.cpp
@@ -0,0 +1,436 @@
+/* -*- 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/. */
+
+#include "nsScriptNameSpaceManager.h"
+#include "nsCOMPtr.h"
+#include "nsIComponentManager.h"
+#include "nsIComponentRegistrar.h"
+#include "nsICategoryManager.h"
+#include "nsIServiceManager.h"
+#include "nsXPCOM.h"
+#include "nsISupportsPrimitives.h"
+#include "nsIScriptNameSpaceManager.h"
+#include "nsIScriptContext.h"
+#include "nsIInterfaceInfoManager.h"
+#include "nsIInterfaceInfo.h"
+#include "xptinfo.h"
+#include "nsXPIDLString.h"
+#include "nsReadableUtils.h"
+#include "nsHashKeys.h"
+#include "nsDOMClassInfo.h"
+#include "nsCRT.h"
+#include "nsIObserverService.h"
+#include "nsISimpleEnumerator.h"
+#include "mozilla/dom/BindingUtils.h"
+#include "mozilla/dom/WebIDLGlobalNameHash.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/Services.h"
+
+#define NS_INTERFACE_PREFIX "nsI"
+#define NS_DOM_INTERFACE_PREFIX "nsIDOM"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+static PLDHashNumber
+GlobalNameHashHashKey(const void *key)
+{
+  const nsAString *str = static_cast<const nsAString *>(key);
+  return HashString(*str);
+}
+
+static bool
+GlobalNameHashMatchEntry(const PLDHashEntryHdr *entry, const void *key)
+{
+  const GlobalNameMapEntry *e =
+    static_cast<const GlobalNameMapEntry *>(entry);
+  const nsAString *str = static_cast<const nsAString *>(key);
+
+  return str->Equals(e->mKey);
+}
+
+static void
+GlobalNameHashClearEntry(PLDHashTable *table, PLDHashEntryHdr *entry)
+{
+  GlobalNameMapEntry *e = static_cast<GlobalNameMapEntry *>(entry);
+
+  // An entry is being cleared, let the key (nsString) do its own
+  // cleanup.
+  e->mKey.~nsString();
+
+  // This will set e->mGlobalName.mType to
+  // nsGlobalNameStruct::eTypeNotInitialized
+  memset(&e->mGlobalName, 0, sizeof(nsGlobalNameStruct));
+}
+
+static void
+GlobalNameHashInitEntry(PLDHashEntryHdr *entry, const void *key)
+{
+  GlobalNameMapEntry *e = static_cast<GlobalNameMapEntry *>(entry);
+  const nsAString *keyStr = static_cast<const nsAString *>(key);
+
+  // Initialize the key in the entry with placement new
+  new (&e->mKey) nsString(*keyStr);
+
+  // This will set e->mGlobalName.mType to
+  // nsGlobalNameStruct::eTypeNotInitialized
+  memset(&e->mGlobalName, 0, sizeof(nsGlobalNameStruct));
+}
+
+NS_IMPL_ISUPPORTS(
+  nsScriptNameSpaceManager,
+  nsIObserver,
+  nsISupportsWeakReference,
+  nsIMemoryReporter)
+
+static const PLDHashTableOps hash_table_ops =
+{
+  GlobalNameHashHashKey,
+  GlobalNameHashMatchEntry,
+  PLDHashTable::MoveEntryStub,
+  GlobalNameHashClearEntry,
+  GlobalNameHashInitEntry
+};
+
+#define GLOBALNAME_HASHTABLE_INITIAL_LENGTH          32
+
+nsScriptNameSpaceManager::nsScriptNameSpaceManager()
+  : mGlobalNames(&hash_table_ops, sizeof(GlobalNameMapEntry),
+                 GLOBALNAME_HASHTABLE_INITIAL_LENGTH)
+{
+  MOZ_COUNT_CTOR(nsScriptNameSpaceManager);
+}
+
+nsScriptNameSpaceManager::~nsScriptNameSpaceManager()
+{
+  UnregisterWeakMemoryReporter(this);
+  MOZ_COUNT_DTOR(nsScriptNameSpaceManager);
+}
+
+nsGlobalNameStruct *
+nsScriptNameSpaceManager::AddToHash(const char *aKey,
+                                    const char16_t **aClassName)
+{
+  NS_ConvertASCIItoUTF16 key(aKey);
+  auto entry = static_cast<GlobalNameMapEntry*>(mGlobalNames.Add(&key, fallible));
+  if (!entry) {
+    return nullptr;
+  }
+
+  WebIDLGlobalNameHash::Remove(aKey, key.Length());
+
+  if (aClassName) {
+    *aClassName = entry->mKey.get();
+  }
+
+  return &entry->mGlobalName;
+}
+
+void
+nsScriptNameSpaceManager::RemoveFromHash(const nsAString *aKey)
+{
+  mGlobalNames.Remove(aKey);
+}
+
+nsresult
+nsScriptNameSpaceManager::FillHash(nsICategoryManager *aCategoryManager,
+                                   const char *aCategory)
+{
+  nsCOMPtr<nsISimpleEnumerator> e;
+  nsresult rv = aCategoryManager->EnumerateCategory(aCategory,
+                                                    getter_AddRefs(e));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsISupports> entry;
+  while (NS_SUCCEEDED(e->GetNext(getter_AddRefs(entry)))) {
+    rv = AddCategoryEntryToHash(aCategoryManager, aCategory, entry);
+    if (NS_FAILED(rv)) {
+      return rv;
+    }
+  }
+
+  return NS_OK;
+}
+
+
+nsresult
+nsScriptNameSpaceManager::Init()
+{
+  RegisterWeakMemoryReporter(this);
+
+  nsresult rv = NS_OK;
+
+  nsCOMPtr<nsICategoryManager> cm =
+    do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = FillHash(cm, JAVASCRIPT_GLOBAL_CONSTRUCTOR_CATEGORY);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = FillHash(cm, JAVASCRIPT_GLOBAL_PROPERTY_CATEGORY);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = FillHash(cm, JAVASCRIPT_GLOBAL_PRIVILEGED_PROPERTY_CATEGORY);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Initial filling of the has table has been done.
+  // Now, listen for changes.
+  nsCOMPtr<nsIObserverService> serv = 
+    mozilla::services::GetObserverService();
+
+  if (serv) {
+    serv->AddObserver(this, NS_XPCOM_CATEGORY_ENTRY_ADDED_OBSERVER_ID, true);
+    serv->AddObserver(this, NS_XPCOM_CATEGORY_ENTRY_REMOVED_OBSERVER_ID, true);
+  }
+
+  return NS_OK;
+}
+
+const nsGlobalNameStruct*
+nsScriptNameSpaceManager::LookupName(const nsAString& aName,
+                                     const char16_t **aClassName)
+{
+  auto entry = static_cast<GlobalNameMapEntry*>(mGlobalNames.Search(&aName));
+
+  if (entry) {
+    if (aClassName) {
+      *aClassName = entry->mKey.get();
+    }
+    return &entry->mGlobalName;
+  }
+
+  if (aClassName) {
+    *aClassName = nullptr;
+  }
+  return nullptr;
+}
+
+nsresult
+nsScriptNameSpaceManager::RegisterClassName(const char *aClassName,
+                                            int32_t aDOMClassInfoID,
+                                            bool aPrivileged,
+                                            bool aXBLAllowed,
+                                            const char16_t **aResult)
+{
+  if (!nsCRT::IsAscii(aClassName)) {
+    NS_ERROR("Trying to register a non-ASCII class name");
+    return NS_OK;
+  }
+  nsGlobalNameStruct *s = AddToHash(aClassName, aResult);
+  NS_ENSURE_TRUE(s, NS_ERROR_OUT_OF_MEMORY);
+
+  if (s->mType == nsGlobalNameStruct::eTypeClassConstructor) {
+    return NS_OK;
+  }
+
+  // If a external constructor is already defined with aClassName we
+  // won't overwrite it.
+
+  if (s->mType == nsGlobalNameStruct::eTypeExternalConstructor) {
+    return NS_OK;
+  }
+
+  NS_ASSERTION(s->mType == nsGlobalNameStruct::eTypeNotInitialized,
+               "Whaaa, JS environment name clash!");
+
+  s->mType = nsGlobalNameStruct::eTypeClassConstructor;
+  s->mDOMClassInfoID = aDOMClassInfoID;
+  s->mChromeOnly = aPrivileged;
+  s->mAllowXBL = aXBLAllowed;
+
+  return NS_OK;
+}
+
+nsresult
+nsScriptNameSpaceManager::RegisterClassProto(const char *aClassName,
+                                             const nsIID *aConstructorProtoIID,
+                                             bool *aFoundOld)
+{
+  NS_ENSURE_ARG_POINTER(aConstructorProtoIID);
+
+  *aFoundOld = false;
+
+  nsGlobalNameStruct *s = AddToHash(aClassName);
+  NS_ENSURE_TRUE(s, NS_ERROR_OUT_OF_MEMORY);
+
+  if (s->mType != nsGlobalNameStruct::eTypeNotInitialized) {
+    *aFoundOld = true;
+
+    return NS_OK;
+  }
+
+  s->mType = nsGlobalNameStruct::eTypeClassProto;
+  s->mIID = *aConstructorProtoIID;
+
+  return NS_OK;
+}
+
+nsresult
+nsScriptNameSpaceManager::OperateCategoryEntryHash(nsICategoryManager* aCategoryManager,
+                                                   const char* aCategory,
+                                                   nsISupports* aEntry,
+                                                   bool aRemove)
+{
+  MOZ_ASSERT(aCategoryManager);
+  // Get the type from the category name.
+  // NOTE: we could have passed the type in FillHash() and guessed it in
+  // Observe() but this way, we have only one place to update and this is
+  // not performance sensitive.
+  nsGlobalNameStruct::nametype type;
+  if (strcmp(aCategory, JAVASCRIPT_GLOBAL_CONSTRUCTOR_CATEGORY) == 0) {
+    type = nsGlobalNameStruct::eTypeExternalConstructor;
+  } else if (strcmp(aCategory, JAVASCRIPT_GLOBAL_PROPERTY_CATEGORY) == 0 ||
+             strcmp(aCategory, JAVASCRIPT_GLOBAL_PRIVILEGED_PROPERTY_CATEGORY) == 0) {
+    type = nsGlobalNameStruct::eTypeProperty;
+  } else {
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsISupportsCString> strWrapper = do_QueryInterface(aEntry);
+
+  if (!strWrapper) {
+    NS_WARNING("Category entry not an nsISupportsCString!");
+    return NS_OK;
+  }
+
+  nsAutoCString categoryEntry;
+  nsresult rv = strWrapper->GetData(categoryEntry);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // We need to handle removal before calling GetCategoryEntry
+  // because the category entry is already removed before we are
+  // notified.
+  if (aRemove) {
+    NS_ConvertASCIItoUTF16 entry(categoryEntry);
+    const nsGlobalNameStruct *s = LookupName(entry);
+    // Verify mType so that this API doesn't remove names
+    // registered by others.
+    if (!s || s->mType != type) {
+      return NS_OK;
+    }
+
+    RemoveFromHash(&entry);
+    return NS_OK;
+  }
+
+  nsXPIDLCString contractId;
+  rv = aCategoryManager->GetCategoryEntry(aCategory, categoryEntry.get(),
+                                          getter_Copies(contractId));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIComponentRegistrar> registrar;
+  rv = NS_GetComponentRegistrar(getter_AddRefs(registrar));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCID *cidPtr;
+  rv = registrar->ContractIDToCID(contractId, &cidPtr);
+
+  if (NS_FAILED(rv)) {
+    NS_WARNING("Bad contract id registed with the script namespace manager");
+    return NS_OK;
+  }
+
+  // Copy CID onto the stack, so we can free it right away and avoid having
+  // to add cleanup code at every exit point from this function.
+  nsCID cid = *cidPtr;
+  free(cidPtr);
+
+  nsGlobalNameStruct *s = AddToHash(categoryEntry.get());
+  NS_ENSURE_TRUE(s, NS_ERROR_OUT_OF_MEMORY);
+
+  if (s->mType == nsGlobalNameStruct::eTypeNotInitialized) {
+    s->mType = type;
+    s->mCID = cid;
+    s->mChromeOnly =
+      strcmp(aCategory, JAVASCRIPT_GLOBAL_PRIVILEGED_PROPERTY_CATEGORY) == 0;
+  } else {
+    NS_WARNING("Global script name not overwritten!");
+  }
+
+  return NS_OK;
+}
+
+nsresult
+nsScriptNameSpaceManager::AddCategoryEntryToHash(nsICategoryManager* aCategoryManager,
+                                                 const char* aCategory,
+                                                 nsISupports* aEntry)
+{
+  return OperateCategoryEntryHash(aCategoryManager, aCategory, aEntry,
+                                  /* aRemove = */ false);
+}
+
+nsresult
+nsScriptNameSpaceManager::RemoveCategoryEntryFromHash(nsICategoryManager* aCategoryManager,
+                                                      const char* aCategory,
+                                                      nsISupports* aEntry)
+{
+  return OperateCategoryEntryHash(aCategoryManager, aCategory, aEntry,
+                                  /* aRemove = */ true);
+}
+
+NS_IMETHODIMP
+nsScriptNameSpaceManager::Observe(nsISupports* aSubject, const char* aTopic,
+                                  const char16_t* aData)
+{
+  if (!aData) {
+    return NS_OK;
+  }
+
+  if (!strcmp(aTopic, NS_XPCOM_CATEGORY_ENTRY_ADDED_OBSERVER_ID)) {
+    nsCOMPtr<nsICategoryManager> cm =
+      do_GetService(NS_CATEGORYMANAGER_CONTRACTID);
+    if (!cm) {
+      return NS_OK;
+    }
+
+    return AddCategoryEntryToHash(cm, NS_ConvertUTF16toUTF8(aData).get(),
+                                  aSubject);
+  } else if (!strcmp(aTopic, NS_XPCOM_CATEGORY_ENTRY_REMOVED_OBSERVER_ID)) {
+    nsCOMPtr<nsICategoryManager> cm =
+      do_GetService(NS_CATEGORYMANAGER_CONTRACTID);
+    if (!cm) {
+      return NS_OK;
+    }
+
+    return RemoveCategoryEntryFromHash(cm, NS_ConvertUTF16toUTF8(aData).get(),
+                                       aSubject);
+  }
+
+  // TODO: we could observe NS_XPCOM_CATEGORY_CLEARED_OBSERVER_ID
+  // but we are safe without it. See bug 600460.
+
+  return NS_OK;
+}
+
+MOZ_DEFINE_MALLOC_SIZE_OF(ScriptNameSpaceManagerMallocSizeOf)
+
+NS_IMETHODIMP
+nsScriptNameSpaceManager::CollectReports(
+  nsIHandleReportCallback* aHandleReport, nsISupports* aData, bool aAnonymize)
+{
+  MOZ_COLLECT_REPORT(
+    "explicit/script-namespace-manager", KIND_HEAP, UNITS_BYTES,
+    SizeOfIncludingThis(ScriptNameSpaceManagerMallocSizeOf),
+    "Memory used for the script namespace manager.");
+
+  return NS_OK;
+}
+
+size_t
+nsScriptNameSpaceManager::SizeOfIncludingThis(
+    mozilla::MallocSizeOf aMallocSizeOf) const
+{
+  size_t n = 0;
+
+  n += mGlobalNames.ShallowSizeOfExcludingThis(aMallocSizeOf);
+  for (auto iter = mGlobalNames.ConstIter(); !iter.Done(); iter.Next()) {
+    auto entry = static_cast<GlobalNameMapEntry*>(iter.Get());
+    n += entry->SizeOfExcludingThis(aMallocSizeOf);
+  }
+
+  return n;
+}