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/* -*- 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* 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_;
explicit Realm(JSRuntime* rt);
// 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);
void UpdateInstanceStackLimitsForSuspendableStack(JSContext* cx,
JS::NativeStackLimit limit);
void ResetInstanceStackLimits(JSContext* cx);
} // namespace wasm
} // namespace js
#endif // wasm_realm_h