Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

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

1 files changed, 739 insertions, 0 deletions

diff --git a/dom/indexedDB/ActorsParentCommon.cpp b/dom/indexedDB/ActorsParentCommon.cpp
new file mode 100644
index 0000000000..52e35c66f5
--- /dev/null
+++ b/dom/indexedDB/ActorsParentCommon.cpp
@@ -0,0 +1,739 @@
+/* -*- 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 "ActorsParentCommon.h"
+
+// local includes
+#include "DatabaseFileInfo.h"
+#include "DatabaseFileManager.h"
+#include "IndexedDatabase.h"  // for StructuredCloneFile...
+#include "IndexedDatabaseInlines.h"
+#include "IndexedDatabaseManager.h"
+#include "IndexedDBCipherKeyManager.h"
+#include "IndexedDBCommon.h"
+#include "ReportInternalError.h"
+
+// global includes
+#include <stdlib.h>
+#include <string.h>
+#include <algorithm>
+#include <numeric>
+#include <type_traits>
+#include "MainThreadUtils.h"
+#include "SafeRefPtr.h"
+#include "js/RootingAPI.h"
+#include "js/StructuredClone.h"
+#include "mozIStorageConnection.h"
+#include "mozIStorageStatement.h"
+#include "mozIStorageValueArray.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/CheckedInt.h"
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/JSObjectHolder.h"
+#include "mozilla/NullPrincipal.h"
+#include "mozilla/ProfilerLabels.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/ResultExtensions.h"
+#include "mozilla/StaticPrefs_dom.h"
+#include "mozilla/StaticPtr.h"
+#include "mozilla/Telemetry.h"
+#include "mozilla/TelemetryScalarEnums.h"
+#include "mozilla/dom/quota/DecryptingInputStream_impl.h"
+#include "mozilla/dom/quota/QuotaCommon.h"
+#include "mozilla/dom/quota/ResultExtensions.h"
+#include "mozilla/dom/quota/ScopedLogExtraInfo.h"
+#include "mozilla/fallible.h"
+#include "mozilla/ipc/BackgroundParent.h"
+#include "mozilla/mozalloc.h"
+#include "nsCOMPtr.h"
+#include "nsCharSeparatedTokenizer.h"
+#include "nsContentUtils.h"
+#include "nsDebug.h"
+#include "nsError.h"
+#include "nsIInputStream.h"
+#include "nsIPrincipal.h"
+#include "nsIXPConnect.h"
+#include "nsNetUtil.h"
+#include "nsString.h"
+#include "nsStringFlags.h"
+#include "nsXULAppAPI.h"
+#include "snappy/snappy.h"
+
+class nsIFile;
+
+namespace mozilla::dom::indexedDB {
+
+static_assert(SNAPPY_VERSION == 0x010109);
+
+using mozilla::ipc::IsOnBackgroundThread;
+
+const nsLiteralString kJournalDirectoryName = u"journals"_ns;
+
+namespace {
+
+constexpr StructuredCloneFileBase::FileType ToStructuredCloneFileType(
+    const char16_t aTag) {
+  switch (aTag) {
+    case char16_t('-'):
+      return StructuredCloneFileBase::eMutableFile;
+
+    case char16_t('.'):
+      return StructuredCloneFileBase::eStructuredClone;
+
+    case char16_t('/'):
+      return StructuredCloneFileBase::eWasmBytecode;
+
+    case char16_t('\\'):
+      return StructuredCloneFileBase::eWasmCompiled;
+
+    default:
+      return StructuredCloneFileBase::eBlob;
+  }
+}
+
+int32_t ToInteger(const nsAString& aStr, nsresult* const aRv) {
+  return aStr.ToInteger(aRv);
+}
+
+Result<StructuredCloneFileParent, nsresult> DeserializeStructuredCloneFile(
+    const DatabaseFileManager& aFileManager,
+    const nsDependentSubstring& aText) {
+  MOZ_ASSERT(!aText.IsEmpty());
+
+  const StructuredCloneFileBase::FileType type =
+      ToStructuredCloneFileType(aText.First());
+
+  QM_TRY_INSPECT(const auto& id,
+                 MOZ_TO_RESULT_GET_TYPED(
+                     int32_t, ToInteger,
+                     type == StructuredCloneFileBase::eBlob
+                         ? aText
+                         : static_cast<const nsAString&>(Substring(aText, 1))));
+
+  SafeRefPtr<DatabaseFileInfo> fileInfo = aFileManager.GetFileInfo(id);
+  MOZ_ASSERT(fileInfo);
+  // XXX In bug 1432133, for some reasons DatabaseFileInfo object cannot be
+  // got. This is just a short-term fix, and we are working on finding the real
+  // cause in bug 1519859.
+  QM_TRY(OkIf((bool)fileInfo), Err(NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR));
+
+  return StructuredCloneFileParent{type, std::move(fileInfo)};
+}
+
+// This class helps to create only 1 sandbox.
+class SandboxHolder final {
+ public:
+  NS_INLINE_DECL_REFCOUNTING(SandboxHolder)
+
+ private:
+  friend JSObject* mozilla::dom::indexedDB::GetSandbox(JSContext* aCx);
+
+  ~SandboxHolder() = default;
+
+  static SandboxHolder* GetOrCreate() {
+    MOZ_ASSERT(XRE_IsParentProcess());
+    MOZ_ASSERT(NS_IsMainThread());
+
+    static StaticRefPtr<SandboxHolder> sHolder;
+    if (!sHolder) {
+      sHolder = new SandboxHolder();
+      ClearOnShutdown(&sHolder);
+    }
+    return sHolder;
+  }
+
+  JSObject* GetSandboxInternal(JSContext* aCx) {
+    if (!mSandbox) {
+      nsIXPConnect* const xpc = nsContentUtils::XPConnect();
+      MOZ_ASSERT(xpc, "This should never be null!");
+
+      // Let's use a null principal.
+      const nsCOMPtr<nsIPrincipal> principal =
+          NullPrincipal::CreateWithoutOriginAttributes();
+
+      JS::Rooted<JSObject*> sandbox(aCx);
+      QM_TRY(
+          MOZ_TO_RESULT(xpc->CreateSandbox(aCx, principal, sandbox.address())),
+          nullptr);
+
+      mSandbox = new JSObjectHolder(aCx, sandbox);
+    }
+
+    return mSandbox->GetJSObject();
+  }
+
+  RefPtr<JSObjectHolder> mSandbox;
+};
+
+uint32_t CompressedByteCountForNumber(uint64_t aNumber) {
+  // All bytes have 7 bits available.
+  uint32_t count = 1;
+  while ((aNumber >>= 7)) {
+    count++;
+  }
+
+  return count;
+}
+
+uint32_t CompressedByteCountForIndexId(IndexOrObjectStoreId aIndexId) {
+  MOZ_ASSERT(aIndexId);
+  MOZ_ASSERT(UINT64_MAX - uint64_t(aIndexId) >= uint64_t(aIndexId),
+             "Overflow!");
+
+  return CompressedByteCountForNumber(uint64_t(aIndexId * 2));
+}
+
+void WriteCompressedNumber(uint64_t aNumber, uint8_t** aIterator) {
+  MOZ_ASSERT(aIterator);
+  MOZ_ASSERT(*aIterator);
+
+  uint8_t*& buffer = *aIterator;
+
+#ifdef DEBUG
+  const uint8_t* const bufferStart = buffer;
+  const uint64_t originalNumber = aNumber;
+#endif
+
+  while (true) {
+    uint64_t shiftedNumber = aNumber >> 7;
+    if (shiftedNumber) {
+      *buffer++ = uint8_t(0x80 | (aNumber & 0x7f));
+      aNumber = shiftedNumber;
+    } else {
+      *buffer++ = uint8_t(aNumber);
+      break;
+    }
+  }
+
+  MOZ_ASSERT(buffer > bufferStart);
+  MOZ_ASSERT(uint32_t(buffer - bufferStart) ==
+             CompressedByteCountForNumber(originalNumber));
+}
+
+void WriteCompressedIndexId(IndexOrObjectStoreId aIndexId, bool aUnique,
+                            uint8_t** aIterator) {
+  MOZ_ASSERT(aIndexId);
+  MOZ_ASSERT(UINT64_MAX - uint64_t(aIndexId) >= uint64_t(aIndexId),
+             "Overflow!");
+  MOZ_ASSERT(aIterator);
+  MOZ_ASSERT(*aIterator);
+
+  const uint64_t indexId = (uint64_t(aIndexId * 2) | (aUnique ? 1 : 0));
+  WriteCompressedNumber(indexId, aIterator);
+}
+
+// aOutIndexValues is an output parameter, since its storage is reused.
+nsresult ReadCompressedIndexDataValuesFromBlob(
+    const Span<const uint8_t> aBlobData,
+    nsTArray<IndexDataValue>* aOutIndexValues) {
+  MOZ_ASSERT(!NS_IsMainThread());
+  MOZ_ASSERT(!IsOnBackgroundThread());
+  MOZ_ASSERT(!aBlobData.IsEmpty());
+  MOZ_ASSERT(aOutIndexValues);
+  MOZ_ASSERT(aOutIndexValues->IsEmpty());
+
+  AUTO_PROFILER_LABEL("ReadCompressedIndexDataValuesFromBlob", DOM);
+
+  // XXX Is this check still necessary with a Span? Or should it rather be moved
+  // to the caller?
+  QM_TRY(OkIf(uintptr_t(aBlobData.Elements()) <=
+              UINTPTR_MAX - aBlobData.LengthBytes()),
+         NS_ERROR_FILE_CORRUPTED, IDB_REPORT_INTERNAL_ERR_LAMBDA);
+
+  for (auto remainder = aBlobData; !remainder.IsEmpty();) {
+    QM_TRY_INSPECT((const auto& [indexId, unique, remainderAfterIndexId]),
+                   ReadCompressedIndexId(remainder));
+
+    QM_TRY(OkIf(!remainderAfterIndexId.IsEmpty()), NS_ERROR_FILE_CORRUPTED,
+           IDB_REPORT_INTERNAL_ERR_LAMBDA);
+
+    // Read key buffer length.
+    QM_TRY_INSPECT(
+        (const auto& [keyBufferLength, remainderAfterKeyBufferLength]),
+        ReadCompressedNumber(remainderAfterIndexId));
+
+    QM_TRY(OkIf(!remainderAfterKeyBufferLength.IsEmpty()),
+           NS_ERROR_FILE_CORRUPTED, IDB_REPORT_INTERNAL_ERR_LAMBDA);
+
+    QM_TRY(OkIf(keyBufferLength <= uint64_t(UINT32_MAX)),
+           NS_ERROR_FILE_CORRUPTED, IDB_REPORT_INTERNAL_ERR_LAMBDA);
+
+    QM_TRY(OkIf(keyBufferLength <= remainderAfterKeyBufferLength.Length()),
+           NS_ERROR_FILE_CORRUPTED, IDB_REPORT_INTERNAL_ERR_LAMBDA);
+
+    const auto [keyBuffer, remainderAfterKeyBuffer] =
+        remainderAfterKeyBufferLength.SplitAt(keyBufferLength);
+    auto idv =
+        IndexDataValue{indexId, unique, Key{nsCString{AsChars(keyBuffer)}}};
+
+    // Read sort key buffer length.
+    QM_TRY_INSPECT(
+        (const auto& [sortKeyBufferLength, remainderAfterSortKeyBufferLength]),
+        ReadCompressedNumber(remainderAfterKeyBuffer));
+
+    remainder = remainderAfterSortKeyBufferLength;
+    if (sortKeyBufferLength > 0) {
+      QM_TRY(OkIf(!remainder.IsEmpty()), NS_ERROR_FILE_CORRUPTED,
+             IDB_REPORT_INTERNAL_ERR_LAMBDA);
+
+      QM_TRY(OkIf(sortKeyBufferLength <= uint64_t(UINT32_MAX)),
+             NS_ERROR_FILE_CORRUPTED, IDB_REPORT_INTERNAL_ERR_LAMBDA);
+
+      QM_TRY(OkIf(sortKeyBufferLength <= remainder.Length()),
+             NS_ERROR_FILE_CORRUPTED, IDB_REPORT_INTERNAL_ERR_LAMBDA);
+
+      const auto [sortKeyBuffer, remainderAfterSortKeyBuffer] =
+          remainder.SplitAt(sortKeyBufferLength);
+      idv.mLocaleAwarePosition = Key{nsCString{AsChars(sortKeyBuffer)}};
+      remainder = remainderAfterSortKeyBuffer;
+    }
+
+    QM_TRY(OkIf(aOutIndexValues->AppendElement(std::move(idv), fallible)),
+           NS_ERROR_OUT_OF_MEMORY, IDB_REPORT_INTERNAL_ERR_LAMBDA);
+  }
+  aOutIndexValues->Sort();
+
+  return NS_OK;
+}
+
+// aOutIndexValues is an output parameter, since its storage is reused.
+template <typename T>
+nsresult ReadCompressedIndexDataValuesFromSource(
+    T& aSource, uint32_t aColumnIndex,
+    nsTArray<IndexDataValue>* aOutIndexValues) {
+  MOZ_ASSERT(!NS_IsMainThread());
+  MOZ_ASSERT(!IsOnBackgroundThread());
+  MOZ_ASSERT(aOutIndexValues);
+  MOZ_ASSERT(aOutIndexValues->IsEmpty());
+
+  QM_TRY_INSPECT(
+      const int32_t& columnType,
+      MOZ_TO_RESULT_INVOKE_MEMBER(aSource, GetTypeOfIndex, aColumnIndex));
+
+  switch (columnType) {
+    case mozIStorageStatement::VALUE_TYPE_NULL:
+      return NS_OK;
+
+    case mozIStorageStatement::VALUE_TYPE_BLOB: {
+      // XXX ToResultInvoke does not support multiple output parameters yet, so
+      // we also can't use QM_TRY_UNWRAP/QM_TRY_INSPECT here.
+      const uint8_t* blobData;
+      uint32_t blobDataLength;
+      QM_TRY(MOZ_TO_RESULT(
+          aSource.GetSharedBlob(aColumnIndex, &blobDataLength, &blobData)));
+
+      QM_TRY(OkIf(blobDataLength), NS_ERROR_FILE_CORRUPTED,
+             IDB_REPORT_INTERNAL_ERR_LAMBDA);
+
+      QM_TRY(MOZ_TO_RESULT(ReadCompressedIndexDataValuesFromBlob(
+          Span(blobData, blobDataLength), aOutIndexValues)));
+
+      return NS_OK;
+    }
+
+    default:
+      return NS_ERROR_FILE_CORRUPTED;
+  }
+}
+
+Result<StructuredCloneReadInfoParent, nsresult>
+GetStructuredCloneReadInfoFromBlob(const uint8_t* aBlobData,
+                                   uint32_t aBlobDataLength,
+                                   const DatabaseFileManager& aFileManager,
+                                   const nsAString& aFileIds) {
+  MOZ_ASSERT(!IsOnBackgroundThread());
+
+  AUTO_PROFILER_LABEL("GetStructuredCloneReadInfoFromBlob", DOM);
+
+  const char* const compressed = reinterpret_cast<const char*>(aBlobData);
+  const size_t compressedLength = size_t(aBlobDataLength);
+
+  size_t uncompressedLength;
+  QM_TRY(OkIf(snappy::GetUncompressedLength(compressed, compressedLength,
+                                            &uncompressedLength)),
+         Err(NS_ERROR_FILE_CORRUPTED));
+
+  // `data` (JSStructuredCloneData) currently uses 4k buffer internally.
+  // For performance reasons, it's better to align `uncompressed` with that.
+  AutoTArray<uint8_t, 4096> uncompressed;
+  QM_TRY(OkIf(uncompressed.SetLength(uncompressedLength, fallible)),
+         Err(NS_ERROR_OUT_OF_MEMORY));
+
+  char* const uncompressedBuffer =
+      reinterpret_cast<char*>(uncompressed.Elements());
+
+  QM_TRY(OkIf(snappy::RawUncompress(compressed, compressedLength,
+                                    uncompressedBuffer)),
+         Err(NS_ERROR_FILE_CORRUPTED));
+
+  JSStructuredCloneData data(JS::StructuredCloneScope::DifferentProcess);
+  QM_TRY(OkIf(data.AppendBytes(uncompressedBuffer, uncompressed.Length())),
+         Err(NS_ERROR_OUT_OF_MEMORY));
+
+  nsTArray<StructuredCloneFileParent> files;
+  if (!aFileIds.IsVoid()) {
+    QM_TRY_UNWRAP(files,
+                  DeserializeStructuredCloneFiles(aFileManager, aFileIds));
+  }
+
+  return StructuredCloneReadInfoParent{std::move(data), std::move(files),
+                                       false};
+}
+
+Result<StructuredCloneReadInfoParent, nsresult>
+GetStructuredCloneReadInfoFromExternalBlob(
+    uint64_t aIntData, const DatabaseFileManager& aFileManager,
+    const nsAString& aFileIds) {
+  MOZ_ASSERT(!IsOnBackgroundThread());
+
+  AUTO_PROFILER_LABEL("GetStructuredCloneReadInfoFromExternalBlob", DOM);
+
+  nsTArray<StructuredCloneFileParent> files;
+  if (!aFileIds.IsVoid()) {
+    QM_TRY_UNWRAP(files,
+                  DeserializeStructuredCloneFiles(aFileManager, aFileIds));
+  }
+
+  // Higher and lower 32 bits described
+  // in ObjectStoreAddOrPutRequestOp::DoDatabaseWork.
+  const uint32_t index = uint32_t(aIntData & UINT32_MAX);
+
+  QM_TRY(OkIf(index < files.Length()), Err(NS_ERROR_UNEXPECTED),
+         [](const auto&) { MOZ_ASSERT(false, "Bad index value!"); });
+
+  if (StaticPrefs::dom_indexedDB_preprocessing()) {
+    return StructuredCloneReadInfoParent{
+        JSStructuredCloneData{JS::StructuredCloneScope::DifferentProcess},
+        std::move(files), true};
+  }
+
+  // XXX Why can there be multiple files, but we use only a single one here?
+  const StructuredCloneFileParent& file = files[index];
+  MOZ_ASSERT(file.Type() == StructuredCloneFileBase::eStructuredClone);
+
+  Maybe<CipherKey> maybeKey;
+
+  if (aFileManager.IsInPrivateBrowsingMode()) {
+    nsCString fileKeyId;
+    fileKeyId.AppendInt(file.FileInfo().Id());
+
+    maybeKey = aFileManager.MutableCipherKeyManagerRef().Get(fileKeyId);
+  }
+
+  auto data = JSStructuredCloneData{JS::StructuredCloneScope::DifferentProcess};
+
+  {
+    const nsCOMPtr<nsIFile> nativeFile = file.FileInfo().GetFileForFileInfo();
+    QM_TRY(OkIf(nativeFile), Err(NS_ERROR_FAILURE));
+
+    QM_TRY_INSPECT(
+        const auto& fileInputStream,
+        NS_NewLocalFileInputStream(nativeFile)
+            .andThen([maybeKey](auto fileInputStream)
+                         -> Result<nsCOMPtr<nsIInputStream>, nsresult> {
+              if (maybeKey) {
+                return nsCOMPtr<nsIInputStream>{MakeRefPtr<
+                    quota::DecryptingInputStream<IndexedDBCipherStrategy>>(
+                    WrapNotNull(std::move(fileInputStream)),
+                    kEncryptedStreamBlockSize, *maybeKey)};
+              }
+
+              return fileInputStream;
+            }));
+
+    QM_TRY(MOZ_TO_RESULT(
+        SnappyUncompressStructuredCloneData(*fileInputStream, data)));
+  }
+
+  return StructuredCloneReadInfoParent{std::move(data), std::move(files),
+                                       false};
+}
+
+template <typename T>
+Result<StructuredCloneReadInfoParent, nsresult>
+GetStructuredCloneReadInfoFromSource(T* aSource, uint32_t aDataIndex,
+                                     uint32_t aFileIdsIndex,
+                                     const DatabaseFileManager& aFileManager) {
+  MOZ_ASSERT(!IsOnBackgroundThread());
+  MOZ_ASSERT(aSource);
+
+  QM_TRY_INSPECT(
+      const int32_t& columnType,
+      MOZ_TO_RESULT_INVOKE_MEMBER(aSource, GetTypeOfIndex, aDataIndex));
+
+  QM_TRY_INSPECT(const bool& isNull, MOZ_TO_RESULT_INVOKE_MEMBER(
+                                         aSource, GetIsNull, aFileIdsIndex));
+
+  QM_TRY_INSPECT(const nsString& fileIds, ([aSource, aFileIdsIndex, isNull] {
+                   return isNull ? Result<nsString, nsresult>{VoidString()}
+                                 : MOZ_TO_RESULT_INVOKE_MEMBER_TYPED(
+                                       nsString, aSource, GetString,
+                                       aFileIdsIndex);
+                 }()));
+
+  switch (columnType) {
+    case mozIStorageStatement::VALUE_TYPE_INTEGER: {
+      QM_TRY_INSPECT(
+          const int64_t& intData,
+          MOZ_TO_RESULT_INVOKE_MEMBER(aSource, GetInt64, aDataIndex));
+
+      uint64_t uintData;
+      memcpy(&uintData, &intData, sizeof(uint64_t));
+
+      return GetStructuredCloneReadInfoFromExternalBlob(uintData, aFileManager,
+                                                        fileIds);
+    }
+
+    case mozIStorageStatement::VALUE_TYPE_BLOB: {
+      const uint8_t* blobData;
+      uint32_t blobDataLength;
+      QM_TRY(MOZ_TO_RESULT(
+          aSource->GetSharedBlob(aDataIndex, &blobDataLength, &blobData)));
+
+      return GetStructuredCloneReadInfoFromBlob(blobData, blobDataLength,
+                                                aFileManager, fileIds);
+    }
+
+    default:
+      return Err(NS_ERROR_FILE_CORRUPTED);
+  }
+}
+
+}  // namespace
+
+IndexDataValue::IndexDataValue() : mIndexId(0), mUnique(false) {
+  MOZ_COUNT_CTOR(IndexDataValue);
+}
+
+#ifdef NS_BUILD_REFCNT_LOGGING
+IndexDataValue::IndexDataValue(IndexDataValue&& aOther)
+    : mIndexId(aOther.mIndexId),
+      mPosition(std::move(aOther.mPosition)),
+      mLocaleAwarePosition(std::move(aOther.mLocaleAwarePosition)),
+      mUnique(aOther.mUnique) {
+  MOZ_ASSERT(!aOther.mPosition.IsUnset());
+
+  MOZ_COUNT_CTOR(IndexDataValue);
+}
+#endif
+
+IndexDataValue::IndexDataValue(IndexOrObjectStoreId aIndexId, bool aUnique,
+                               const Key& aPosition)
+    : mIndexId(aIndexId), mPosition(aPosition), mUnique(aUnique) {
+  MOZ_ASSERT(!aPosition.IsUnset());
+
+  MOZ_COUNT_CTOR(IndexDataValue);
+}
+
+IndexDataValue::IndexDataValue(IndexOrObjectStoreId aIndexId, bool aUnique,
+                               const Key& aPosition,
+                               const Key& aLocaleAwarePosition)
+    : mIndexId(aIndexId),
+      mPosition(aPosition),
+      mLocaleAwarePosition(aLocaleAwarePosition),
+      mUnique(aUnique) {
+  MOZ_ASSERT(!aPosition.IsUnset());
+
+  MOZ_COUNT_CTOR(IndexDataValue);
+}
+
+bool IndexDataValue::operator==(const IndexDataValue& aOther) const {
+  if (mIndexId != aOther.mIndexId) {
+    return false;
+  }
+  if (mLocaleAwarePosition.IsUnset()) {
+    return mPosition == aOther.mPosition;
+  }
+  return mLocaleAwarePosition == aOther.mLocaleAwarePosition;
+}
+
+bool IndexDataValue::operator<(const IndexDataValue& aOther) const {
+  if (mIndexId == aOther.mIndexId) {
+    if (mLocaleAwarePosition.IsUnset()) {
+      return mPosition < aOther.mPosition;
+    }
+    return mLocaleAwarePosition < aOther.mLocaleAwarePosition;
+  }
+
+  return mIndexId < aOther.mIndexId;
+}
+
+JSObject* GetSandbox(JSContext* aCx) {
+  SandboxHolder* holder = SandboxHolder::GetOrCreate();
+  return holder->GetSandboxInternal(aCx);
+}
+
+Result<std::pair<UniqueFreePtr<uint8_t>, uint32_t>, nsresult>
+MakeCompressedIndexDataValues(const nsTArray<IndexDataValue>& aIndexValues) {
+  MOZ_ASSERT(!NS_IsMainThread());
+  MOZ_ASSERT(!IsOnBackgroundThread());
+
+  AUTO_PROFILER_LABEL("MakeCompressedIndexDataValues", DOM);
+
+  const uint32_t arrayLength = aIndexValues.Length();
+  if (!arrayLength) {
+    return std::pair{UniqueFreePtr<uint8_t>{}, 0u};
+  }
+
+  // First calculate the size of the final buffer.
+  const auto blobDataLength = std::accumulate(
+      aIndexValues.cbegin(), aIndexValues.cend(), CheckedUint32(0),
+      [](CheckedUint32 sum, const IndexDataValue& info) {
+        const nsCString& keyBuffer = info.mPosition.GetBuffer();
+        const nsCString& sortKeyBuffer = info.mLocaleAwarePosition.GetBuffer();
+        const uint32_t keyBufferLength = keyBuffer.Length();
+        const uint32_t sortKeyBufferLength = sortKeyBuffer.Length();
+
+        MOZ_ASSERT(!keyBuffer.IsEmpty());
+
+        return sum + CompressedByteCountForIndexId(info.mIndexId) +
+               CompressedByteCountForNumber(keyBufferLength) +
+               CompressedByteCountForNumber(sortKeyBufferLength) +
+               keyBufferLength + sortKeyBufferLength;
+      });
+
+  QM_TRY(OkIf(blobDataLength.isValid()),
+         Err(NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR),
+         IDB_REPORT_INTERNAL_ERR_LAMBDA);
+
+  UniqueFreePtr<uint8_t> blobData(
+      static_cast<uint8_t*>(malloc(blobDataLength.value())));
+  QM_TRY(OkIf(static_cast<bool>(blobData)), Err(NS_ERROR_OUT_OF_MEMORY),
+         IDB_REPORT_INTERNAL_ERR_LAMBDA);
+
+  uint8_t* blobDataIter = blobData.get();
+
+  for (const IndexDataValue& info : aIndexValues) {
+    const nsCString& keyBuffer = info.mPosition.GetBuffer();
+    const nsCString& sortKeyBuffer = info.mLocaleAwarePosition.GetBuffer();
+    const uint32_t keyBufferLength = keyBuffer.Length();
+    const uint32_t sortKeyBufferLength = sortKeyBuffer.Length();
+
+    WriteCompressedIndexId(info.mIndexId, info.mUnique, &blobDataIter);
+    WriteCompressedNumber(keyBufferLength, &blobDataIter);
+
+    memcpy(blobDataIter, keyBuffer.get(), keyBufferLength);
+    blobDataIter += keyBufferLength;
+
+    WriteCompressedNumber(sortKeyBufferLength, &blobDataIter);
+
+    memcpy(blobDataIter, sortKeyBuffer.get(), sortKeyBufferLength);
+    blobDataIter += sortKeyBufferLength;
+  }
+
+  MOZ_ASSERT(blobDataIter == blobData.get() + blobDataLength.value());
+
+  return std::pair{std::move(blobData), blobDataLength.value()};
+}
+
+nsresult ReadCompressedIndexDataValues(
+    mozIStorageStatement& aStatement, uint32_t aColumnIndex,
+    nsTArray<IndexDataValue>& aOutIndexValues) {
+  return ReadCompressedIndexDataValuesFromSource(aStatement, aColumnIndex,
+                                                 &aOutIndexValues);
+}
+
+template <typename T>
+Result<IndexDataValuesAutoArray, nsresult> ReadCompressedIndexDataValues(
+    T& aValues, uint32_t aColumnIndex) {
+  return MOZ_TO_RESULT_INVOKE_TYPED(IndexDataValuesAutoArray,
+                                    &ReadCompressedIndexDataValuesFromSource<T>,
+                                    aValues, aColumnIndex);
+}
+
+template Result<IndexDataValuesAutoArray, nsresult>
+ReadCompressedIndexDataValues<mozIStorageValueArray>(mozIStorageValueArray&,
+                                                     uint32_t);
+
+template Result<IndexDataValuesAutoArray, nsresult>
+ReadCompressedIndexDataValues<mozIStorageStatement>(mozIStorageStatement&,
+                                                    uint32_t);
+
+Result<std::tuple<IndexOrObjectStoreId, bool, Span<const uint8_t>>, nsresult>
+ReadCompressedIndexId(const Span<const uint8_t> aData) {
+  QM_TRY_INSPECT((const auto& [indexId, remainder]),
+                 ReadCompressedNumber(aData));
+
+  MOZ_ASSERT(UINT64_MAX / 2 >= uint64_t(indexId), "Bad index id!");
+
+  return std::tuple{IndexOrObjectStoreId(indexId >> 1), indexId % 2 == 1,
+                    remainder};
+}
+
+Result<std::pair<uint64_t, mozilla::Span<const uint8_t>>, nsresult>
+ReadCompressedNumber(const Span<const uint8_t> aSpan) {
+  uint8_t shiftCounter = 0;
+  uint64_t result = 0;
+
+  const auto end = aSpan.cend();
+
+  const auto newPos =
+      std::find_if(aSpan.cbegin(), end, [&result, &shiftCounter](uint8_t byte) {
+        MOZ_ASSERT(shiftCounter <= 56, "Shifted too many bits!");
+
+        result += (uint64_t(byte & 0x7f) << shiftCounter);
+        shiftCounter += 7;
+
+        return !(byte & 0x80);
+      });
+
+  QM_TRY(OkIf(newPos != end), Err(NS_ERROR_FILE_CORRUPTED), [](const auto&) {
+    MOZ_ASSERT(false);
+    IDB_REPORT_INTERNAL_ERR();
+  });
+
+  return std::pair{result, Span{newPos + 1, end}};
+}
+
+Result<StructuredCloneReadInfoParent, nsresult>
+GetStructuredCloneReadInfoFromValueArray(
+    mozIStorageValueArray* aValues, uint32_t aDataIndex, uint32_t aFileIdsIndex,
+    const DatabaseFileManager& aFileManager) {
+  return GetStructuredCloneReadInfoFromSource(aValues, aDataIndex,
+                                              aFileIdsIndex, aFileManager);
+}
+
+Result<StructuredCloneReadInfoParent, nsresult>
+GetStructuredCloneReadInfoFromStatement(
+    mozIStorageStatement* aStatement, uint32_t aDataIndex,
+    uint32_t aFileIdsIndex, const DatabaseFileManager& aFileManager) {
+  return GetStructuredCloneReadInfoFromSource(aStatement, aDataIndex,
+                                              aFileIdsIndex, aFileManager);
+}
+
+Result<nsTArray<StructuredCloneFileParent>, nsresult>
+DeserializeStructuredCloneFiles(const DatabaseFileManager& aFileManager,
+                                const nsAString& aText) {
+  MOZ_ASSERT(!IsOnBackgroundThread());
+
+  nsTArray<StructuredCloneFileParent> result;
+  for (const auto& token :
+       nsCharSeparatedTokenizerTemplate<NS_TokenizerIgnoreNothing>(aText, ' ')
+           .ToRange()) {
+    MOZ_ASSERT(!token.IsEmpty());
+
+    QM_TRY_UNWRAP(auto structuredCloneFile,
+                  DeserializeStructuredCloneFile(aFileManager, token));
+
+    result.EmplaceBack(std::move(structuredCloneFile));
+  }
+
+  return result;
+}
+
+nsresult ExecuteSimpleSQLSequence(mozIStorageConnection& aConnection,
+                                  Span<const nsLiteralCString> aSQLCommands) {
+  for (const auto& aSQLCommand : aSQLCommands) {
+    const auto extraInfo = quota::ScopedLogExtraInfo{
+        quota::ScopedLogExtraInfo::kTagQuery, aSQLCommand};
+
+    QM_TRY(MOZ_TO_RESULT(aConnection.ExecuteSimpleSQL(aSQLCommand)));
+  }
+
+  return NS_OK;
+}
+
+}  // namespace mozilla::dom::indexedDB