Add m-esr52 at 52.6.0

1 files changed, 95 insertions, 0 deletions

diff --git a/security/manager/ssl/CryptoTask.cpp b/security/manager/ssl/CryptoTask.cpp
new file mode 100644
index 000000000..71b8ac88d
--- /dev/null
+++ b/security/manager/ssl/CryptoTask.cpp
@@ -0,0 +1,95 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "CryptoTask.h"
+#include "nsNSSComponent.h"
+
+namespace mozilla {
+
+CryptoTask::~CryptoTask()
+{
+  MOZ_ASSERT(mReleasedNSSResources);
+
+  nsNSSShutDownPreventionLock lock;
+  if (!isAlreadyShutDown()) {
+    shutdown(ShutdownCalledFrom::Object);
+  }
+}
+
+nsresult
+CryptoTask::Dispatch(const nsACString& taskThreadName)
+{
+  MOZ_ASSERT(taskThreadName.Length() <= 15);
+
+  // Ensure that NSS is initialized, since presumably CalculateResult
+  // will use NSS functions
+  if (!EnsureNSSInitializedChromeOrContent()) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // Can't add 'this' as the event to run, since mThread may not be set yet
+  nsresult rv = NS_NewThread(getter_AddRefs(mThread), nullptr,
+                             nsIThreadManager::DEFAULT_STACK_SIZE);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  NS_SetThreadName(mThread, taskThreadName);
+  // Note: event must not null out mThread!
+  return mThread->Dispatch(this, NS_DISPATCH_NORMAL);
+}
+
+NS_IMETHODIMP
+CryptoTask::Run()
+{
+  if (!NS_IsMainThread()) {
+    nsNSSShutDownPreventionLock locker;
+    if (isAlreadyShutDown()) {
+      mRv = NS_ERROR_NOT_AVAILABLE;
+    } else {
+      mRv = CalculateResult();
+    }
+    NS_DispatchToMainThread(this);
+  } else {
+    // back on the main thread
+
+    // call ReleaseNSSResources now, before calling CallCallback, so that
+    // CryptoTasks have consistent behavior regardless of whether NSS is shut
+    // down between CalculateResult being called and CallCallback being called.
+    if (!mReleasedNSSResources) {
+      mReleasedNSSResources = true;
+      ReleaseNSSResources();
+    }
+
+    CallCallback(mRv);
+
+    // Not all uses of CryptoTask use a transient thread
+    if (mThread) {
+      // Don't leak threads!
+      mThread->Shutdown(); // can't Shutdown from the thread itself, darn
+      // Don't null out mThread!
+      // See bug 999104.  We must hold a ref to the thread across Dispatch()
+      // since the internal mThread ref could be released while processing
+      // the Dispatch(), and Dispatch/PutEvent itself doesn't hold a ref; it
+      // assumes the caller does.
+    }
+  }
+
+  return NS_OK;
+}
+
+void
+CryptoTask::virtualDestroyNSSReference()
+{
+  MOZ_ASSERT(NS_IsMainThread(),
+             "virtualDestroyNSSReference called off the main thread");
+  if (!mReleasedNSSResources) {
+    mReleasedNSSResources = true;
+    ReleaseNSSResources();
+  }
+}
+
+} // namespace mozilla