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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:
* 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 */
#ifndef jit_IonCompileTask_h
#define jit_IonCompileTask_h
#include "mozilla/LinkedList.h"
#include "jit/MIRGenerator.h"
#include "js/Utility.h"
#include "vm/HelperThreadTask.h"
struct JS_PUBLIC_API JSContext;
namespace js {
namespace jit {
class CodeGenerator;
class WarpSnapshot;
// IonCompileTask represents a single off-thread Ion compilation task.
class IonCompileTask final : public HelperThreadTask,
public mozilla::LinkedListElement<IonCompileTask> {
MIRGenerator& mirGen_;
// If off thread compilation is successful, the final code generator is
// attached here. Code has been generated, but not linked (there is not yet
// an IonScript). This is heap allocated, and must be explicitly destroyed,
// performed by FinishOffThreadTask().
CodeGenerator* backgroundCodegen_ = nullptr;
WarpSnapshot* snapshot_ = nullptr;
// Alias of the JSContext field of this task, to determine the priority of
// compiling this script. Contexts are destroyed after the pending tasks are
// removed from the helper threads. Thus this should be safe.
const mozilla::Atomic<bool, mozilla::ReleaseAcquire>& isExecuting_;
explicit IonCompileTask(JSContext* cx, MIRGenerator& mirGen,
WarpSnapshot* snapshot);
JSScript* script() { return mirGen_.outerInfo().script(); }
MIRGenerator& mirGen() { return mirGen_; }
TempAllocator& alloc() { return mirGen_.alloc(); }
WarpSnapshot* snapshot() { return snapshot_; }
size_t sizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf);
void trace(JSTracer* trc);
CodeGenerator* backgroundCodegen() const { return backgroundCodegen_; }
void setBackgroundCodegen(CodeGenerator* codegen) {
backgroundCodegen_ = codegen;
// Return whether the main thread which scheduled this task is currently
// executing JS code. This changes the way we prioritize tasks.
bool isMainThreadRunningJS() const { return isExecuting_; }
ThreadType threadType() override { return THREAD_TYPE_ION; }
void runTask();
void runHelperThreadTask(AutoLockHelperThreadState& locked) override;
class IonFreeTask : public HelperThreadTask {
IonFreeCompileTasks tasks_;
explicit IonFreeTask(IonFreeCompileTasks&& tasks) : tasks_(std::move(tasks)) {
const IonFreeCompileTasks& compileTasks() const { return tasks_; }
ThreadType threadType() override { return THREAD_TYPE_ION_FREE; }
void runHelperThreadTask(AutoLockHelperThreadState& locked) override;
void AttachFinishedCompilations(JSContext* cx);
void FinishOffThreadTask(JSRuntime* runtime, AutoStartIonFreeTask& freeTask,
IonCompileTask* task);
void FreeIonCompileTasks(const IonFreeCompileTasks& tasks);
} // namespace jit
} // namespace js
#endif /* jit_IonCompileTask_h */