Adding upstream version 86.0.1.upstream/86.0.1upstream

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

1 files changed, 741 insertions, 0 deletions

diff --git a/netwerk/cache2/CacheFileContextEvictor.cpp b/netwerk/cache2/CacheFileContextEvictor.cpp
new file mode 100644
index 0000000000..1dc2af5848
--- /dev/null
+++ b/netwerk/cache2/CacheFileContextEvictor.cpp
@@ -0,0 +1,741 @@
+/* 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 "CacheLog.h"
+#include "CacheFileContextEvictor.h"
+#include "CacheFileIOManager.h"
+#include "CacheIndex.h"
+#include "CacheIndexIterator.h"
+#include "CacheFileUtils.h"
+#include "nsIFile.h"
+#include "LoadContextInfo.h"
+#include "nsThreadUtils.h"
+#include "nsString.h"
+#include "nsIDirectoryEnumerator.h"
+#include "mozilla/Base64.h"
+#include "mozilla/IntegerPrintfMacros.h"
+#include "nsContentUtils.h"
+#include "nsNetUtil.h"
+
+namespace mozilla {
+namespace net {
+
+#define CONTEXT_EVICTION_PREFIX "ce_"
+const uint32_t kContextEvictionPrefixLength =
+    sizeof(CONTEXT_EVICTION_PREFIX) - 1;
+
+bool CacheFileContextEvictor::sDiskAlreadySearched = false;
+
+CacheFileContextEvictor::CacheFileContextEvictor()
+    : mEvicting(false), mIndexIsUpToDate(false) {
+  LOG(("CacheFileContextEvictor::CacheFileContextEvictor() [this=%p]", this));
+}
+
+CacheFileContextEvictor::~CacheFileContextEvictor() {
+  LOG(("CacheFileContextEvictor::~CacheFileContextEvictor() [this=%p]", this));
+}
+
+nsresult CacheFileContextEvictor::Init(nsIFile* aCacheDirectory) {
+  LOG(("CacheFileContextEvictor::Init()"));
+
+  nsresult rv;
+
+  MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
+
+  CacheIndex::IsUpToDate(&mIndexIsUpToDate);
+
+  mCacheDirectory = aCacheDirectory;
+
+  rv = aCacheDirectory->Clone(getter_AddRefs(mEntriesDir));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  rv = mEntriesDir->AppendNative(nsLiteralCString(ENTRIES_DIR));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  if (!sDiskAlreadySearched) {
+    LoadEvictInfoFromDisk();
+    if ((mEntries.Length() != 0) && mIndexIsUpToDate) {
+      CreateIterators();
+      StartEvicting();
+    }
+  }
+
+  return NS_OK;
+}
+
+void CacheFileContextEvictor::Shutdown() {
+  LOG(("CacheFileContextEvictor::Shutdown()"));
+
+  MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
+
+  CloseIterators();
+}
+
+uint32_t CacheFileContextEvictor::ContextsCount() {
+  MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
+
+  return mEntries.Length();
+}
+
+nsresult CacheFileContextEvictor::AddContext(
+    nsILoadContextInfo* aLoadContextInfo, bool aPinned,
+    const nsAString& aOrigin) {
+  LOG(
+      ("CacheFileContextEvictor::AddContext() [this=%p, loadContextInfo=%p, "
+       "pinned=%d]",
+       this, aLoadContextInfo, aPinned));
+
+  nsresult rv;
+
+  MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
+
+  CacheFileContextEvictorEntry* entry = nullptr;
+  if (aLoadContextInfo) {
+    for (uint32_t i = 0; i < mEntries.Length(); ++i) {
+      if (mEntries[i]->mInfo && mEntries[i]->mInfo->Equals(aLoadContextInfo) &&
+          mEntries[i]->mPinned == aPinned &&
+          mEntries[i]->mOrigin.Equals(aOrigin)) {
+        entry = mEntries[i].get();
+        break;
+      }
+    }
+  } else {
+    // Not providing load context info means we want to delete everything,
+    // so let's not bother with any currently running context cleanups
+    // for the same pinning state.
+    for (uint32_t i = mEntries.Length(); i > 0;) {
+      --i;
+      if (mEntries[i]->mInfo && mEntries[i]->mPinned == aPinned) {
+        RemoveEvictInfoFromDisk(mEntries[i]->mInfo, mEntries[i]->mPinned,
+                                mEntries[i]->mOrigin);
+        mEntries.RemoveElementAt(i);
+      }
+    }
+  }
+
+  if (!entry) {
+    entry = new CacheFileContextEvictorEntry();
+    entry->mInfo = aLoadContextInfo;
+    entry->mPinned = aPinned;
+    entry->mOrigin = aOrigin;
+    mEntries.AppendElement(WrapUnique(entry));
+  }
+
+  entry->mTimeStamp = PR_Now() / PR_USEC_PER_MSEC;
+
+  PersistEvictionInfoToDisk(aLoadContextInfo, aPinned, aOrigin);
+
+  if (mIndexIsUpToDate) {
+    // Already existing context could be added again, in this case the iterator
+    // would be recreated. Close the old iterator explicitely.
+    if (entry->mIterator) {
+      entry->mIterator->Close();
+      entry->mIterator = nullptr;
+    }
+
+    rv = CacheIndex::GetIterator(aLoadContextInfo, false,
+                                 getter_AddRefs(entry->mIterator));
+    if (NS_FAILED(rv)) {
+      // This could probably happen during shutdown. Remove the entry from
+      // the array, but leave the info on the disk. No entry can be opened
+      // during shutdown and we'll load the eviction info on next start.
+      LOG(
+          ("CacheFileContextEvictor::AddContext() - Cannot get an iterator. "
+           "[rv=0x%08" PRIx32 "]",
+           static_cast<uint32_t>(rv)));
+      mEntries.RemoveElement(entry);
+      return rv;
+    }
+
+    StartEvicting();
+  }
+
+  return NS_OK;
+}
+
+void CacheFileContextEvictor::CacheIndexStateChanged() {
+  LOG(("CacheFileContextEvictor::CacheIndexStateChanged() [this=%p]", this));
+
+  MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
+
+  bool isUpToDate = false;
+  CacheIndex::IsUpToDate(&isUpToDate);
+  if (mEntries.Length() == 0) {
+    // Just save the state and exit, since there is nothing to do
+    mIndexIsUpToDate = isUpToDate;
+    return;
+  }
+
+  if (!isUpToDate && !mIndexIsUpToDate) {
+    // Index is outdated and status has not changed, nothing to do.
+    return;
+  }
+
+  if (isUpToDate && mIndexIsUpToDate) {
+    // Status has not changed, but make sure the eviction is running.
+    if (mEvicting) {
+      return;
+    }
+
+    // We're not evicting, but we should be evicting?!
+    LOG(
+        ("CacheFileContextEvictor::CacheIndexStateChanged() - Index is up to "
+         "date, we have some context to evict but eviction is not running! "
+         "Starting now."));
+  }
+
+  mIndexIsUpToDate = isUpToDate;
+
+  if (mIndexIsUpToDate) {
+    CreateIterators();
+    StartEvicting();
+  } else {
+    CloseIterators();
+  }
+}
+
+void CacheFileContextEvictor::WasEvicted(const nsACString& aKey, nsIFile* aFile,
+                                         bool* aEvictedAsPinned,
+                                         bool* aEvictedAsNonPinned) {
+  LOG(("CacheFileContextEvictor::WasEvicted() [key=%s]",
+       PromiseFlatCString(aKey).get()));
+
+  *aEvictedAsPinned = false;
+  *aEvictedAsNonPinned = false;
+
+  MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
+
+  nsCOMPtr<nsILoadContextInfo> info = CacheFileUtils::ParseKey(aKey);
+  MOZ_ASSERT(info);
+  if (!info) {
+    LOG(("CacheFileContextEvictor::WasEvicted() - Cannot parse key!"));
+    return;
+  }
+
+  for (uint32_t i = 0; i < mEntries.Length(); ++i) {
+    const auto& entry = mEntries[i];
+
+    if (entry->mInfo && !info->Equals(entry->mInfo)) {
+      continue;
+    }
+
+    PRTime lastModifiedTime;
+    if (NS_FAILED(aFile->GetLastModifiedTime(&lastModifiedTime))) {
+      LOG(
+          ("CacheFileContextEvictor::WasEvicted() - Cannot get last modified "
+           "time, returning."));
+      return;
+    }
+
+    if (lastModifiedTime > entry->mTimeStamp) {
+      // File has been modified since context eviction.
+      continue;
+    }
+
+    LOG(
+        ("CacheFileContextEvictor::WasEvicted() - evicted [pinning=%d, "
+         "mTimeStamp=%" PRId64 ", lastModifiedTime=%" PRId64 "]",
+         entry->mPinned, entry->mTimeStamp, lastModifiedTime));
+
+    if (entry->mPinned) {
+      *aEvictedAsPinned = true;
+    } else {
+      *aEvictedAsNonPinned = true;
+    }
+  }
+}
+
+nsresult CacheFileContextEvictor::PersistEvictionInfoToDisk(
+    nsILoadContextInfo* aLoadContextInfo, bool aPinned,
+    const nsAString& aOrigin) {
+  LOG(
+      ("CacheFileContextEvictor::PersistEvictionInfoToDisk() [this=%p, "
+       "loadContextInfo=%p]",
+       this, aLoadContextInfo));
+
+  nsresult rv;
+
+  MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
+
+  nsCOMPtr<nsIFile> file;
+  rv = GetContextFile(aLoadContextInfo, aPinned, aOrigin, getter_AddRefs(file));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  nsCString path = file->HumanReadablePath();
+
+  PRFileDesc* fd;
+  rv =
+      file->OpenNSPRFileDesc(PR_RDWR | PR_CREATE_FILE | PR_TRUNCATE, 0600, &fd);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    LOG(
+        ("CacheFileContextEvictor::PersistEvictionInfoToDisk() - Creating file "
+         "failed! [path=%s, rv=0x%08" PRIx32 "]",
+         path.get(), static_cast<uint32_t>(rv)));
+    return rv;
+  }
+
+  PR_Close(fd);
+
+  LOG(
+      ("CacheFileContextEvictor::PersistEvictionInfoToDisk() - Successfully "
+       "created file. [path=%s]",
+       path.get()));
+
+  return NS_OK;
+}
+
+nsresult CacheFileContextEvictor::RemoveEvictInfoFromDisk(
+    nsILoadContextInfo* aLoadContextInfo, bool aPinned,
+    const nsAString& aOrigin) {
+  LOG(
+      ("CacheFileContextEvictor::RemoveEvictInfoFromDisk() [this=%p, "
+       "loadContextInfo=%p]",
+       this, aLoadContextInfo));
+
+  nsresult rv;
+
+  MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
+
+  nsCOMPtr<nsIFile> file;
+  rv = GetContextFile(aLoadContextInfo, aPinned, aOrigin, getter_AddRefs(file));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  nsCString path = file->HumanReadablePath();
+
+  rv = file->Remove(false);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    LOG(
+        ("CacheFileContextEvictor::RemoveEvictionInfoFromDisk() - Removing file"
+         " failed! [path=%s, rv=0x%08" PRIx32 "]",
+         path.get(), static_cast<uint32_t>(rv)));
+    return rv;
+  }
+
+  LOG(
+      ("CacheFileContextEvictor::RemoveEvictionInfoFromDisk() - Successfully "
+       "removed file. [path=%s]",
+       path.get()));
+
+  return NS_OK;
+}
+
+nsresult CacheFileContextEvictor::LoadEvictInfoFromDisk() {
+  LOG(("CacheFileContextEvictor::LoadEvictInfoFromDisk() [this=%p]", this));
+
+  nsresult rv;
+
+  MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
+
+  sDiskAlreadySearched = true;
+
+  nsCOMPtr<nsIDirectoryEnumerator> dirEnum;
+  rv = mCacheDirectory->GetDirectoryEntries(getter_AddRefs(dirEnum));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  while (true) {
+    nsCOMPtr<nsIFile> file;
+    rv = dirEnum->GetNextFile(getter_AddRefs(file));
+    if (!file) {
+      break;
+    }
+
+    bool isDir = false;
+    file->IsDirectory(&isDir);
+    if (isDir) {
+      continue;
+    }
+
+    nsAutoCString leaf;
+    rv = file->GetNativeLeafName(leaf);
+    if (NS_FAILED(rv)) {
+      LOG(
+          ("CacheFileContextEvictor::LoadEvictInfoFromDisk() - "
+           "GetNativeLeafName() failed! Skipping file."));
+      continue;
+    }
+
+    if (leaf.Length() < kContextEvictionPrefixLength) {
+      continue;
+    }
+
+    if (!StringBeginsWith(leaf, nsLiteralCString(CONTEXT_EVICTION_PREFIX))) {
+      continue;
+    }
+
+    nsAutoCString encoded;
+    encoded = Substring(leaf, kContextEvictionPrefixLength);
+    encoded.ReplaceChar('-', '/');
+
+    nsAutoCString decoded;
+    rv = Base64Decode(encoded, decoded);
+    if (NS_FAILED(rv)) {
+      LOG(
+          ("CacheFileContextEvictor::LoadEvictInfoFromDisk() - Base64 decoding "
+           "failed. Removing the file. [file=%s]",
+           leaf.get()));
+      file->Remove(false);
+      continue;
+    }
+
+    bool pinned = decoded[0] == '\t';
+    if (pinned) {
+      decoded = Substring(decoded, 1);
+    }
+
+    // Let's see if we have an origin.
+    nsAutoCString origin;
+    if (decoded.Contains('\t')) {
+      auto split = decoded.Split('\t');
+      MOZ_ASSERT(decoded.CountChar('\t') == 1);
+
+      auto splitIt = split.begin();
+      origin = *splitIt;
+      ++splitIt;
+      decoded = *splitIt;
+    }
+
+    nsCOMPtr<nsILoadContextInfo> info;
+    if (!"*"_ns.Equals(decoded)) {
+      // "*" is indication of 'delete all', info left null will pass
+      // to CacheFileContextEvictor::AddContext and clear all the cache data.
+      info = CacheFileUtils::ParseKey(decoded);
+      if (!info) {
+        LOG(
+            ("CacheFileContextEvictor::LoadEvictInfoFromDisk() - Cannot parse "
+             "context key, removing file. [contextKey=%s, file=%s]",
+             decoded.get(), leaf.get()));
+        file->Remove(false);
+        continue;
+      }
+    }
+
+    PRTime lastModifiedTime;
+    rv = file->GetLastModifiedTime(&lastModifiedTime);
+    if (NS_FAILED(rv)) {
+      continue;
+    }
+
+    CacheFileContextEvictorEntry* entry = new CacheFileContextEvictorEntry();
+    entry->mInfo = info;
+    entry->mPinned = pinned;
+    CopyUTF8toUTF16(origin, entry->mOrigin);
+    entry->mTimeStamp = lastModifiedTime;
+    mEntries.AppendElement(entry);
+  }
+
+  return NS_OK;
+}
+
+nsresult CacheFileContextEvictor::GetContextFile(
+    nsILoadContextInfo* aLoadContextInfo, bool aPinned,
+    const nsAString& aOrigin, nsIFile** _retval) {
+  nsresult rv;
+
+  nsAutoCString keyPrefix;
+  if (aPinned) {
+    // Mark pinned context files with a tab char at the start.
+    // Tab is chosen because it can never be used as a context key tag.
+    keyPrefix.Append('\t');
+  }
+  if (aLoadContextInfo) {
+    CacheFileUtils::AppendKeyPrefix(aLoadContextInfo, keyPrefix);
+  } else {
+    keyPrefix.Append('*');
+  }
+  if (!aOrigin.IsEmpty()) {
+    keyPrefix.Append('\t');
+    keyPrefix.Append(NS_ConvertUTF16toUTF8(aOrigin));
+  }
+
+  nsAutoCString leafName;
+  leafName.AssignLiteral(CONTEXT_EVICTION_PREFIX);
+
+  rv = Base64EncodeAppend(keyPrefix, leafName);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  // Replace '/' with '-' since '/' cannot be part of the filename.
+  leafName.ReplaceChar('/', '-');
+
+  nsCOMPtr<nsIFile> file;
+  rv = mCacheDirectory->Clone(getter_AddRefs(file));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  rv = file->AppendNative(leafName);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  file.swap(*_retval);
+  return NS_OK;
+}
+
+void CacheFileContextEvictor::CreateIterators() {
+  LOG(("CacheFileContextEvictor::CreateIterators() [this=%p]", this));
+
+  CloseIterators();
+
+  nsresult rv;
+
+  for (uint32_t i = 0; i < mEntries.Length();) {
+    rv = CacheIndex::GetIterator(mEntries[i]->mInfo, false,
+                                 getter_AddRefs(mEntries[i]->mIterator));
+    if (NS_FAILED(rv)) {
+      LOG(
+          ("CacheFileContextEvictor::CreateIterators() - Cannot get an iterator"
+           ". [rv=0x%08" PRIx32 "]",
+           static_cast<uint32_t>(rv)));
+      mEntries.RemoveElementAt(i);
+      continue;
+    }
+
+    ++i;
+  }
+}
+
+void CacheFileContextEvictor::CloseIterators() {
+  LOG(("CacheFileContextEvictor::CloseIterators() [this=%p]", this));
+
+  for (uint32_t i = 0; i < mEntries.Length(); ++i) {
+    if (mEntries[i]->mIterator) {
+      mEntries[i]->mIterator->Close();
+      mEntries[i]->mIterator = nullptr;
+    }
+  }
+}
+
+void CacheFileContextEvictor::StartEvicting() {
+  LOG(("CacheFileContextEvictor::StartEvicting() [this=%p]", this));
+
+  MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
+
+  if (mEvicting) {
+    LOG(("CacheFileContextEvictor::StartEvicting() - already evicting."));
+    return;
+  }
+
+  if (mEntries.Length() == 0) {
+    LOG(("CacheFileContextEvictor::StartEvicting() - no context to evict."));
+    return;
+  }
+
+  nsCOMPtr<nsIRunnable> ev =
+      NewRunnableMethod("net::CacheFileContextEvictor::EvictEntries", this,
+                        &CacheFileContextEvictor::EvictEntries);
+
+  RefPtr<CacheIOThread> ioThread = CacheFileIOManager::IOThread();
+
+  nsresult rv = ioThread->Dispatch(ev, CacheIOThread::EVICT);
+  if (NS_FAILED(rv)) {
+    LOG(
+        ("CacheFileContextEvictor::StartEvicting() - Cannot dispatch event to "
+         "IO thread. [rv=0x%08" PRIx32 "]",
+         static_cast<uint32_t>(rv)));
+  }
+
+  mEvicting = true;
+}
+
+void CacheFileContextEvictor::EvictEntries() {
+  LOG(("CacheFileContextEvictor::EvictEntries()"));
+
+  nsresult rv;
+
+  MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
+
+  mEvicting = false;
+
+  if (!mIndexIsUpToDate) {
+    LOG(
+        ("CacheFileContextEvictor::EvictEntries() - Stopping evicting due to "
+         "outdated index."));
+    return;
+  }
+
+  while (true) {
+    if (CacheObserver::ShuttingDown()) {
+      LOG(
+          ("CacheFileContextEvictor::EvictEntries() - Stopping evicting due to "
+           "shutdown."));
+      mEvicting =
+          true;  // We don't want to start eviction again during shutdown
+                 // process. Setting this flag to true ensures it.
+      return;
+    }
+
+    if (CacheIOThread::YieldAndRerun()) {
+      LOG(
+          ("CacheFileContextEvictor::EvictEntries() - Breaking loop for higher "
+           "level events."));
+      mEvicting = true;
+      return;
+    }
+
+    if (mEntries.Length() == 0) {
+      LOG(
+          ("CacheFileContextEvictor::EvictEntries() - Stopping evicting, there "
+           "is no context to evict."));
+
+      // Allow index to notify AsyncGetDiskConsumption callbacks.  The size is
+      // actual again.
+      CacheIndex::OnAsyncEviction(false);
+      return;
+    }
+
+    SHA1Sum::Hash hash;
+    rv = mEntries[0]->mIterator->GetNextHash(&hash);
+    if (rv == NS_ERROR_NOT_AVAILABLE) {
+      LOG(
+          ("CacheFileContextEvictor::EvictEntries() - No more entries left in "
+           "iterator. [iterator=%p, info=%p]",
+           mEntries[0]->mIterator.get(), mEntries[0]->mInfo.get()));
+      RemoveEvictInfoFromDisk(mEntries[0]->mInfo, mEntries[0]->mPinned,
+                              mEntries[0]->mOrigin);
+      mEntries.RemoveElementAt(0);
+      continue;
+    } else if (NS_FAILED(rv)) {
+      LOG(
+          ("CacheFileContextEvictor::EvictEntries() - Iterator failed to "
+           "provide next hash (shutdown?), keeping eviction info on disk."
+           " [iterator=%p, info=%p]",
+           mEntries[0]->mIterator.get(), mEntries[0]->mInfo.get()));
+      mEntries.RemoveElementAt(0);
+      continue;
+    }
+
+    LOG(
+        ("CacheFileContextEvictor::EvictEntries() - Processing hash. "
+         "[hash=%08x%08x%08x%08x%08x, iterator=%p, info=%p]",
+         LOGSHA1(&hash), mEntries[0]->mIterator.get(),
+         mEntries[0]->mInfo.get()));
+
+    RefPtr<CacheFileHandle> handle;
+    CacheFileIOManager::gInstance->mHandles.GetHandle(&hash,
+                                                      getter_AddRefs(handle));
+    if (handle) {
+      // We doom any active handle in CacheFileIOManager::EvictByContext(), so
+      // this must be a new one. Skip it.
+      LOG(
+          ("CacheFileContextEvictor::EvictEntries() - Skipping entry since we "
+           "found an active handle. [handle=%p]",
+           handle.get()));
+      continue;
+    }
+
+    CacheIndex::EntryStatus status;
+    bool pinned = false;
+    auto callback = [&pinned](const CacheIndexEntry* aEntry) {
+      pinned = aEntry->IsPinned();
+    };
+    rv = CacheIndex::HasEntry(hash, &status, callback);
+    // This must never fail, since eviction (this code) happens only when the
+    // index is up-to-date and thus the informatin is known.
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+
+    if (pinned != mEntries[0]->mPinned) {
+      LOG(
+          ("CacheFileContextEvictor::EvictEntries() - Skipping entry since "
+           "pinning "
+           "doesn't match [evicting pinned=%d, entry pinned=%d]",
+           mEntries[0]->mPinned, pinned));
+      continue;
+    }
+
+    if (!mEntries[0]->mOrigin.IsEmpty()) {
+      nsCOMPtr<nsIFile> file;
+      CacheFileIOManager::gInstance->GetFile(&hash, getter_AddRefs(file));
+
+      // Read metadata from the file synchronously
+      RefPtr<CacheFileMetadata> metadata = new CacheFileMetadata();
+      rv = metadata->SyncReadMetadata(file);
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        continue;
+      }
+
+      // Now get the context + enhance id + URL from the key.
+      nsAutoCString uriSpec;
+      RefPtr<nsILoadContextInfo> info =
+          CacheFileUtils::ParseKey(metadata->GetKey(), nullptr, &uriSpec);
+      MOZ_ASSERT(info);
+      if (!info) {
+        continue;
+      }
+
+      nsCOMPtr<nsIURI> uri;
+      rv = NS_NewURI(getter_AddRefs(uri), uriSpec);
+      if (NS_FAILED(rv)) {
+        LOG(
+            ("CacheFileContextEvictor::EvictEntries() - Skipping entry since "
+             "NS_NewURI failed to parse the uriSpec"));
+        continue;
+      }
+
+      nsAutoString urlOrigin;
+      rv = nsContentUtils::GetUTFOrigin(uri, urlOrigin);
+      if (NS_FAILED(rv)) {
+        LOG(
+            ("CacheFileContextEvictor::EvictEntries() - Skipping entry since "
+             "We failed to extract an origin"));
+        continue;
+      }
+
+      if (!urlOrigin.Equals(mEntries[0]->mOrigin)) {
+        LOG(
+            ("CacheFileContextEvictor::EvictEntries() - Skipping entry since "
+             "origin "
+             "doesn't match"));
+        continue;
+      }
+    }
+
+    nsAutoCString leafName;
+    CacheFileIOManager::HashToStr(&hash, leafName);
+
+    PRTime lastModifiedTime;
+    nsCOMPtr<nsIFile> file;
+    rv = mEntriesDir->Clone(getter_AddRefs(file));
+    if (NS_SUCCEEDED(rv)) {
+      rv = file->AppendNative(leafName);
+    }
+    if (NS_SUCCEEDED(rv)) {
+      rv = file->GetLastModifiedTime(&lastModifiedTime);
+    }
+    if (NS_FAILED(rv)) {
+      LOG(
+          ("CacheFileContextEvictor::EvictEntries() - Cannot get last modified "
+           "time, skipping entry."));
+      continue;
+    }
+
+    if (lastModifiedTime > mEntries[0]->mTimeStamp) {
+      LOG(
+          ("CacheFileContextEvictor::EvictEntries() - Skipping newer entry. "
+           "[mTimeStamp=%" PRId64 ", lastModifiedTime=%" PRId64 "]",
+           mEntries[0]->mTimeStamp, lastModifiedTime));
+      continue;
+    }
+
+    LOG(("CacheFileContextEvictor::EvictEntries - Removing entry."));
+    file->Remove(false);
+    CacheIndex::RemoveEntry(&hash);
+  }
+
+  MOZ_ASSERT_UNREACHABLE("We should never get here");
+}
+
+}  // namespace net
+}  // namespace mozilla