Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 448 insertions, 0 deletions

diff --git a/dom/indexedDB/IndexedDatabase.cpp b/dom/indexedDB/IndexedDatabase.cpp
new file mode 100644
index 0000000000..e480fb00ee
--- /dev/null
+++ b/dom/indexedDB/IndexedDatabase.cpp
@@ -0,0 +1,448 @@
+/* -*- 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 "mozilla/dom/IndexedDatabase.h"
+#include "IndexedDatabaseInlines.h"
+
+#include "IDBDatabase.h"
+
+#include "mozilla/dom/FileBlobImpl.h"
+#include "mozilla/dom/StructuredCloneTags.h"
+#include "mozilla/dom/WorkerScope.h"
+#include "MainThreadUtils.h"
+#include "jsapi.h"
+#include "nsIFile.h"
+#include "nsIGlobalObject.h"
+#include "nsQueryObject.h"
+#include "nsString.h"
+
+namespace mozilla::dom::indexedDB {
+namespace {
+struct MOZ_STACK_CLASS MutableFileData final {
+  nsString type;
+  nsString name;
+
+  MOZ_COUNTED_DEFAULT_CTOR(MutableFileData)
+
+  MOZ_COUNTED_DTOR(MutableFileData)
+};
+
+struct MOZ_STACK_CLASS BlobOrFileData final {
+  uint32_t tag = 0;
+  uint64_t size = 0;
+  nsString type;
+  nsString name;
+  int64_t lastModifiedDate = INT64_MAX;
+
+  MOZ_COUNTED_DEFAULT_CTOR(BlobOrFileData)
+
+  MOZ_COUNTED_DTOR(BlobOrFileData)
+};
+
+struct MOZ_STACK_CLASS WasmModuleData final {
+  uint32_t bytecodeIndex;
+  uint32_t compiledIndex;
+  uint32_t flags;
+
+  explicit WasmModuleData(uint32_t aFlags)
+      : bytecodeIndex(0), compiledIndex(0), flags(aFlags) {
+    MOZ_COUNT_CTOR(WasmModuleData);
+  }
+
+  MOZ_COUNTED_DTOR(WasmModuleData)
+};
+
+bool StructuredCloneReadString(JSStructuredCloneReader* aReader,
+                               nsCString& aString) {
+  uint32_t length;
+  if (!JS_ReadBytes(aReader, &length, sizeof(uint32_t))) {
+    NS_WARNING("Failed to read length!");
+    return false;
+  }
+  length = NativeEndian::swapFromLittleEndian(length);
+
+  if (!aString.SetLength(length, fallible)) {
+    NS_WARNING("Out of memory?");
+    return false;
+  }
+  char* const buffer = aString.BeginWriting();
+
+  if (!JS_ReadBytes(aReader, buffer, length)) {
+    NS_WARNING("Failed to read type!");
+    return false;
+  }
+
+  return true;
+}
+
+bool ReadFileHandle(JSStructuredCloneReader* aReader,
+                    MutableFileData* aRetval) {
+  static_assert(SCTAG_DOM_MUTABLEFILE == 0xFFFF8004, "Update me!");
+  MOZ_ASSERT(aReader && aRetval);
+
+  nsCString type;
+  if (!StructuredCloneReadString(aReader, type)) {
+    return false;
+  }
+  CopyUTF8toUTF16(type, aRetval->type);
+
+  nsCString name;
+  if (!StructuredCloneReadString(aReader, name)) {
+    return false;
+  }
+  CopyUTF8toUTF16(name, aRetval->name);
+
+  return true;
+}
+
+bool ReadBlobOrFile(JSStructuredCloneReader* aReader, uint32_t aTag,
+                    BlobOrFileData* aRetval) {
+  static_assert(SCTAG_DOM_BLOB == 0xffff8001 &&
+                    SCTAG_DOM_FILE_WITHOUT_LASTMODIFIEDDATE == 0xffff8002 &&
+                    SCTAG_DOM_FILE == 0xffff8005,
+                "Update me!");
+
+  MOZ_ASSERT(aReader);
+  MOZ_ASSERT(aTag == SCTAG_DOM_FILE ||
+             aTag == SCTAG_DOM_FILE_WITHOUT_LASTMODIFIEDDATE ||
+             aTag == SCTAG_DOM_BLOB);
+  MOZ_ASSERT(aRetval);
+
+  aRetval->tag = aTag;
+
+  uint64_t size;
+  if (NS_WARN_IF(!JS_ReadBytes(aReader, &size, sizeof(uint64_t)))) {
+    return false;
+  }
+
+  aRetval->size = NativeEndian::swapFromLittleEndian(size);
+
+  nsCString type;
+  if (NS_WARN_IF(!StructuredCloneReadString(aReader, type))) {
+    return false;
+  }
+
+  CopyUTF8toUTF16(type, aRetval->type);
+
+  // Blobs are done.
+  if (aTag == SCTAG_DOM_BLOB) {
+    return true;
+  }
+
+  MOZ_ASSERT(aTag == SCTAG_DOM_FILE ||
+             aTag == SCTAG_DOM_FILE_WITHOUT_LASTMODIFIEDDATE);
+
+  int64_t lastModifiedDate;
+  if (aTag == SCTAG_DOM_FILE_WITHOUT_LASTMODIFIEDDATE) {
+    lastModifiedDate = INT64_MAX;
+  } else {
+    if (NS_WARN_IF(!JS_ReadBytes(aReader, &lastModifiedDate,
+                                 sizeof(lastModifiedDate)))) {
+      return false;
+    }
+    lastModifiedDate = NativeEndian::swapFromLittleEndian(lastModifiedDate);
+  }
+
+  aRetval->lastModifiedDate = lastModifiedDate;
+
+  nsCString name;
+  if (NS_WARN_IF(!StructuredCloneReadString(aReader, name))) {
+    return false;
+  }
+
+  CopyUTF8toUTF16(name, aRetval->name);
+
+  return true;
+}
+
+bool ReadWasmModule(JSStructuredCloneReader* aReader, WasmModuleData* aRetval) {
+  static_assert(SCTAG_DOM_WASM_MODULE == 0xFFFF8006, "Update me!");
+  MOZ_ASSERT(aReader && aRetval);
+
+  uint32_t bytecodeIndex;
+  uint32_t compiledIndex;
+  if (NS_WARN_IF(!JS_ReadUint32Pair(aReader, &bytecodeIndex, &compiledIndex))) {
+    return false;
+  }
+
+  aRetval->bytecodeIndex = bytecodeIndex;
+  aRetval->compiledIndex = compiledIndex;
+
+  return true;
+}
+
+template <typename StructuredCloneFile>
+class ValueDeserializationHelper;
+
+class ValueDeserializationHelperBase {
+ public:
+  static bool CreateAndWrapWasmModule(JSContext* aCx,
+                                      const StructuredCloneFileBase& aFile,
+                                      const WasmModuleData& aData,
+                                      JS::MutableHandle<JSObject*> aResult) {
+    MOZ_ASSERT(aCx);
+    MOZ_ASSERT(aFile.Type() == StructuredCloneFileBase::eWasmBytecode);
+
+    // Both on the parent and child side, just create a plain object here,
+    // support for de-serialization of WebAssembly.Modules has been removed in
+    // bug 1561876. Full removal is tracked in bug 1487479.
+
+    JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
+    if (NS_WARN_IF(!obj)) {
+      return false;
+    }
+
+    aResult.set(obj);
+    return true;
+  }
+
+  template <typename StructuredCloneFile>
+  static bool CreateAndWrapBlobOrFile(JSContext* aCx, IDBDatabase* aDatabase,
+                                      const StructuredCloneFile& aFile,
+                                      const BlobOrFileData& aData,
+                                      JS::MutableHandle<JSObject*> aResult) {
+    MOZ_ASSERT(aCx);
+    MOZ_ASSERT(aData.tag == SCTAG_DOM_FILE ||
+               aData.tag == SCTAG_DOM_FILE_WITHOUT_LASTMODIFIEDDATE ||
+               aData.tag == SCTAG_DOM_BLOB);
+    MOZ_ASSERT(aFile.Type() == StructuredCloneFileBase::eBlob);
+
+    const auto blob = ValueDeserializationHelper<StructuredCloneFile>::GetBlob(
+        aCx, aDatabase, aFile);
+    if (NS_WARN_IF(!blob)) {
+      return false;
+    }
+
+    if (aData.tag == SCTAG_DOM_BLOB) {
+      blob->Impl()->SetLazyData(VoidString(), aData.type, aData.size,
+                                INT64_MAX);
+      MOZ_ASSERT(!blob->IsFile());
+
+      // XXX The comment below is somewhat confusing, since it seems to imply
+      // that this branch is only executed when called from ActorsParent, but
+      // it's executed from both the parent and the child side code.
+
+      // ActorsParent sends here a kind of half blob and half file wrapped into
+      // a DOM File object. DOM File and DOM Blob are a WebIDL wrapper around a
+      // BlobImpl object. SetLazyData() has just changed the BlobImpl to be a
+      // Blob (see the previous assert), but 'blob' still has the WebIDL DOM
+      // File wrapping.
+      // Before exposing it to content, we must recreate a DOM Blob object.
+
+      const RefPtr<Blob> exposedBlob =
+          Blob::Create(blob->GetParentObject(), blob->Impl());
+      if (NS_WARN_IF(!exposedBlob)) {
+        return false;
+      }
+
+      return WrapAsJSObject(aCx, exposedBlob, aResult);
+    }
+
+    blob->Impl()->SetLazyData(aData.name, aData.type, aData.size,
+                              aData.lastModifiedDate * PR_USEC_PER_MSEC);
+
+    MOZ_ASSERT(blob->IsFile());
+    const RefPtr<File> file = blob->ToFile();
+    MOZ_ASSERT(file);
+
+    return WrapAsJSObject(aCx, file, aResult);
+  }
+};
+
+template <>
+class ValueDeserializationHelper<StructuredCloneFileParent>
+    : public ValueDeserializationHelperBase {
+ public:
+  static bool CreateAndWrapMutableFile(JSContext* aCx,
+                                       StructuredCloneFileParent& aFile,
+                                       const MutableFileData& aData,
+                                       JS::MutableHandle<JSObject*> aResult) {
+    MOZ_ASSERT(aCx);
+    MOZ_ASSERT(aFile.Type() == StructuredCloneFileBase::eBlob);
+
+    // We are in an IDB SQLite schema upgrade where we don't care about a real
+    // 'MutableFile', but we just care of having a proper |mType| flag.
+
+    aFile.MutateType(StructuredCloneFileBase::eMutableFile);
+
+    // Just make a dummy object.
+    JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
+
+    if (NS_WARN_IF(!obj)) {
+      return false;
+    }
+
+    aResult.set(obj);
+    return true;
+  }
+
+  static RefPtr<Blob> GetBlob(JSContext* aCx, IDBDatabase* aDatabase,
+                              const StructuredCloneFileParent& aFile) {
+    // This is chrome code, so there is no parent, but still we want to set a
+    // correct parent for the new File object.
+    const auto global = [aDatabase, aCx]() -> nsCOMPtr<nsIGlobalObject> {
+      if (NS_IsMainThread()) {
+        if (aDatabase && aDatabase->GetParentObject()) {
+          return aDatabase->GetParentObject();
+        }
+        return xpc::CurrentNativeGlobal(aCx);
+      }
+      const WorkerPrivate* const workerPrivate =
+          GetCurrentThreadWorkerPrivate();
+      MOZ_ASSERT(workerPrivate);
+
+      WorkerGlobalScope* const globalScope = workerPrivate->GlobalScope();
+      MOZ_ASSERT(globalScope);
+
+      return do_QueryObject(globalScope);
+    }();
+
+    MOZ_ASSERT(global);
+
+    // We do not have an mBlob but do have a DatabaseFileInfo.
+    //
+    // If we are creating an index, we do need a real-looking Blob/File instance
+    // because the index's key path can reference their properties.  Rather than
+    // create a fake-looking object, create a real Blob.
+    //
+    // If we are in a schema upgrade, we don't strictly need that, but we do not
+    // need to optimize for that, and create it anyway.
+    const nsCOMPtr<nsIFile> file = aFile.FileInfo().GetFileForFileInfo();
+    if (!file) {
+      return nullptr;
+    }
+
+    const auto impl = MakeRefPtr<FileBlobImpl>(file);
+    impl->SetFileId(aFile.FileInfo().Id());
+    return File::Create(global, impl);
+  }
+};
+
+template <>
+class ValueDeserializationHelper<StructuredCloneFileChild>
+    : public ValueDeserializationHelperBase {
+ public:
+  static bool CreateAndWrapMutableFile(JSContext* aCx,
+                                       StructuredCloneFileChild& aFile,
+                                       const MutableFileData& aData,
+                                       JS::MutableHandle<JSObject*> aResult) {
+    MOZ_ASSERT(aCx);
+    MOZ_ASSERT(aFile.Type() == StructuredCloneFileBase::eMutableFile);
+
+    return false;
+  }
+
+  static RefPtr<Blob> GetBlob(JSContext* aCx, IDBDatabase* aDatabase,
+                              const StructuredCloneFileChild& aFile) {
+    if (aFile.HasBlob()) {
+      return aFile.BlobPtr();
+    }
+
+    MOZ_CRASH("Expected a StructuredCloneFile with a Blob");
+  }
+};
+
+}  // namespace
+
+template <typename StructuredCloneReadInfo>
+JSObject* CommonStructuredCloneReadCallback(
+    JSContext* aCx, JSStructuredCloneReader* aReader,
+    const JS::CloneDataPolicy& aCloneDataPolicy, uint32_t aTag, uint32_t aData,
+    StructuredCloneReadInfo* aCloneReadInfo, IDBDatabase* aDatabase) {
+  // We need to statically assert that our tag values are what we expect
+  // so that if people accidentally change them they notice.
+  static_assert(SCTAG_DOM_BLOB == 0xffff8001 &&
+                    SCTAG_DOM_FILE_WITHOUT_LASTMODIFIEDDATE == 0xffff8002 &&
+                    SCTAG_DOM_MUTABLEFILE == 0xffff8004 &&
+                    SCTAG_DOM_FILE == 0xffff8005 &&
+                    SCTAG_DOM_WASM_MODULE == 0xffff8006,
+                "You changed our structured clone tag values and just ate "
+                "everyone's IndexedDB data.  I hope you are happy.");
+
+  using StructuredCloneFile =
+      typename StructuredCloneReadInfo::StructuredCloneFile;
+
+  if (aTag == SCTAG_DOM_FILE_WITHOUT_LASTMODIFIEDDATE ||
+      aTag == SCTAG_DOM_BLOB || aTag == SCTAG_DOM_FILE ||
+      aTag == SCTAG_DOM_MUTABLEFILE || aTag == SCTAG_DOM_WASM_MODULE) {
+    JS::Rooted<JSObject*> result(aCx);
+
+    if (aTag == SCTAG_DOM_WASM_MODULE) {
+      WasmModuleData data(aData);
+      if (NS_WARN_IF(!ReadWasmModule(aReader, &data))) {
+        return nullptr;
+      }
+
+      MOZ_ASSERT(data.compiledIndex == data.bytecodeIndex + 1);
+      MOZ_ASSERT(!data.flags);
+
+      const auto& files = aCloneReadInfo->Files();
+      if (data.bytecodeIndex >= files.Length() ||
+          data.compiledIndex >= files.Length()) {
+        MOZ_ASSERT(false, "Bad index value!");
+        return nullptr;
+      }
+
+      const auto& file = files[data.bytecodeIndex];
+
+      if (NS_WARN_IF(!ValueDeserializationHelper<StructuredCloneFile>::
+                         CreateAndWrapWasmModule(aCx, file, data, &result))) {
+        return nullptr;
+      }
+
+      return result;
+    }
+
+    if (aData >= aCloneReadInfo->Files().Length()) {
+      MOZ_ASSERT(false, "Bad index value!");
+      return nullptr;
+    }
+
+    auto& file = aCloneReadInfo->MutableFile(aData);
+
+    if (aTag == SCTAG_DOM_MUTABLEFILE) {
+      MutableFileData data;
+      if (NS_WARN_IF(!ReadFileHandle(aReader, &data))) {
+        return nullptr;
+      }
+
+      if (NS_WARN_IF(!ValueDeserializationHelper<StructuredCloneFile>::
+                         CreateAndWrapMutableFile(aCx, file, data, &result))) {
+        return nullptr;
+      }
+
+      return result;
+    }
+
+    BlobOrFileData data;
+    if (NS_WARN_IF(!ReadBlobOrFile(aReader, aTag, &data))) {
+      return nullptr;
+    }
+
+    if (NS_WARN_IF(!ValueDeserializationHelper<
+                   StructuredCloneFile>::CreateAndWrapBlobOrFile(aCx, aDatabase,
+                                                                 file, data,
+                                                                 &result))) {
+      return nullptr;
+    }
+
+    return result;
+  }
+
+  return StructuredCloneHolder::ReadFullySerializableObjects(aCx, aReader,
+                                                             aTag);
+}
+
+template JSObject* CommonStructuredCloneReadCallback(
+    JSContext* aCx, JSStructuredCloneReader* aReader,
+    const JS::CloneDataPolicy& aCloneDataPolicy, uint32_t aTag, uint32_t aData,
+    StructuredCloneReadInfoChild* aCloneReadInfo, IDBDatabase* aDatabase);
+
+template JSObject* CommonStructuredCloneReadCallback(
+    JSContext* aCx, JSStructuredCloneReader* aReader,
+    const JS::CloneDataPolicy& aCloneDataPolicy, uint32_t aTag, uint32_t aData,
+    StructuredCloneReadInfoParent* aCloneReadInfo, IDBDatabase* aDatabase);
+}  // namespace mozilla::dom::indexedDB