Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 89 insertions, 0 deletions

diff --git a/js/src/jit/IonCompileTask.h b/js/src/jit/IonCompileTask.h
new file mode 100644
index 0000000000..c997c13bc6
--- /dev/null
+++ b/js/src/jit/IonCompileTask.h
@@ -0,0 +1,89 @@
+/* -*- 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/. */
+
+#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_;
+
+ public:
+  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 {
+ public:
+  explicit IonFreeTask(IonCompileTask* task) : task_(task) {}
+  IonCompileTask* compileTask() { return task_; }
+
+  ThreadType threadType() override { return THREAD_TYPE_ION_FREE; }
+  void runHelperThreadTask(AutoLockHelperThreadState& locked) override;
+
+ private:
+  IonCompileTask* task_;
+};
+
+void AttachFinishedCompilations(JSContext* cx);
+void FinishOffThreadTask(JSRuntime* runtime, IonCompileTask* task,
+                         const AutoLockHelperThreadState& lock);
+void FreeIonCompileTask(IonCompileTask* task);
+
+}  // namespace jit
+}  // namespace js
+
+#endif /* jit_IonCompileTask_h */