1 files changed, 106 insertions, 0 deletions
diff --git a/js/src/threading/ProtectedData.cpp b/js/src/threading/ProtectedData.cpp
new file mode 100644
index 0000000000..9843fd5784
--- /dev/null
+++ b/js/src/threading/ProtectedData.cpp
@@ -0,0 +1,106 @@
+/* -*- 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 "threading/ProtectedData.h"
+
+#include "vm/HelperThreads.h"
+#include "vm/JSContext.h"
+
+namespace js {
+
+#ifdef JS_HAS_PROTECTED_DATA_CHECKS
+
+/* static */ mozilla::Atomic<size_t, mozilla::SequentiallyConsistent>
+    AutoNoteSingleThreadedRegion::count(0);
+
+template <AllowedHelperThread Helper>
+static inline bool OnHelperThread() {
+  if (Helper == AllowedHelperThread::IonCompile ||
+      Helper == AllowedHelperThread::GCTaskOrIonCompile ||
+      Helper == AllowedHelperThread::ParseTaskOrIonCompile) {
+    if (CurrentThreadIsIonCompiling()) {
+      return true;
+    }
+  }
+
+  if (Helper == AllowedHelperThread::GCTask ||
+      Helper == AllowedHelperThread::GCTaskOrIonCompile) {
+    if (CurrentThreadIsPerformingGC()) {
+      return true;
+    }
+  }
+
+  if (Helper == AllowedHelperThread::ParseTask ||
+      Helper == AllowedHelperThread::ParseTaskOrIonCompile) {
+    if (CurrentThreadIsParseThread()) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+void CheckThreadLocal::check() const {
+  JSContext* cx = TlsContext.get();
+  MOZ_ASSERT(cx);
+  MOZ_ASSERT_IF(cx->isMainThreadContext(),
+                CurrentThreadCanAccessRuntime(cx->runtime()));
+  MOZ_ASSERT(id == ThreadId::ThisThreadId());
+}
+
+void CheckContextLocal::check() const {
+  if (!cx_->isInitialized()) {
+    return;
+  }
+
+  JSContext* cx = TlsContext.get();
+  MOZ_ASSERT(cx);
+  MOZ_ASSERT_IF(cx->isMainThreadContext(),
+                CurrentThreadCanAccessRuntime(cx->runtime()));
+  MOZ_ASSERT(cx_ == cx);
+}
+
+template <AllowedHelperThread Helper>
+void CheckMainThread<Helper>::check() const {
+  if (OnHelperThread<Helper>()) {
+    return;
+  }
+
+  JSContext* cx = TlsContext.get();
+  MOZ_ASSERT(CurrentThreadCanAccessRuntime(cx->runtime()));
+}
+
+template class CheckMainThread<AllowedHelperThread::None>;
+template class CheckMainThread<AllowedHelperThread::GCTask>;
+template class CheckMainThread<AllowedHelperThread::ParseTask>;
+template class CheckMainThread<AllowedHelperThread::IonCompile>;
+template class CheckMainThread<AllowedHelperThread::ParseTaskOrIonCompile>;
+
+template <GlobalLock Lock, AllowedHelperThread Helper>
+void CheckGlobalLock<Lock, Helper>::check() const {
+  if (OnHelperThread<Helper>()) {
+    return;
+  }
+
+  switch (Lock) {
+    case GlobalLock::GCLock:
+      TlsGCContext.get()
+          ->runtimeFromAnyThread()
+          ->gc.assertCurrentThreadHasLockedGC();
+      break;
+    case GlobalLock::HelperThreadLock:
+      gHelperThreadLock.assertOwnedByCurrentThread();
+      break;
+  }
+}
+
+template class CheckGlobalLock<GlobalLock::GCLock, AllowedHelperThread::None>;
+template class CheckGlobalLock<GlobalLock::HelperThreadLock,
+                               AllowedHelperThread::None>;
+
+#endif  // JS_HAS_PROTECTED_DATA_CHECKS
+
+}  // namespace js