1 files changed, 84 insertions, 0 deletions
diff --git a/js/src/wasm/WasmRealm.h b/js/src/wasm/WasmRealm.h
new file mode 100644
index 0000000000..6ad7c435b9
--- /dev/null
+++ b/js/src/wasm/WasmRealm.h
@@ -0,0 +1,84 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ *
+ * Copyright 2016 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef wasm_realm_h
+#define wasm_realm_h
+
+#include "js/TracingAPI.h"
+
+#include "wasm/WasmTypeDecls.h"
+
+namespace js {
+
+class WasmTagObject;
+
+namespace wasm {
+
+// wasm::Realm lives in JS::Realm and contains the wasm-related per-realm state.
+// wasm::Realm tracks every live instance in the realm and must be notified, via
+// registerInstance(), of any new WasmInstanceObject.
+
+class Realm {
+  JSRuntime* runtime_;
+  InstanceVector instances_;
+
+ public:
+  explicit Realm(JSRuntime* rt);
+  ~Realm();
+
+  // Before a WasmInstanceObject can be considered fully constructed and
+  // valid, it must be registered with the Realm. If this method fails,
+  // an error has been reported and the instance object must be abandoned.
+  // After a successful registration, an Instance must call
+  // unregisterInstance() before being destroyed.
+
+  bool registerInstance(JSContext* cx, Handle<WasmInstanceObject*> instanceObj);
+  void unregisterInstance(Instance& instance);
+
+  // Return a vector of all live instances in the realm. The lifetime of
+  // these Instances is determined by their owning WasmInstanceObject.
+  // Note that accessing instances()[i]->object() triggers a read barrier
+  // since instances() is effectively a weak list.
+
+  const InstanceVector& instances() const { return instances_; }
+
+  // Ensure all Instances in this Realm have profiling labels created.
+
+  void ensureProfilingLabels(bool profilingEnabled);
+
+  // about:memory reporting
+
+  void addSizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf,
+                              size_t* realmTables);
+};
+
+// Interrupt all running wasm Instances that have been registered with
+// wasm::Realms in the given JSContext.
+
+extern void InterruptRunningCode(JSContext* cx);
+
+// After a wasm Instance sees an interrupt request and calls
+// CheckForInterrupt(), it should call RunningCodeInterrupted() to clear the
+// interrupt request for all wasm Instances to avoid spurious trapping.
+
+void ResetInterruptState(JSContext* cx);
+
+}  // namespace wasm
+}  // namespace js
+
+#endif  // wasm_realm_h