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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 mozilla_dom_SerializedStackHolder_h
#define mozilla_dom_SerializedStackHolder_h
#include "mozilla/dom/StructuredCloneHolder.h"
#include "mozilla/dom/WorkerRef.h"
namespace mozilla::dom {
// Information about a main or worker thread stack trace that can be accessed
// from either kind of thread. When a worker thread stack is serialized, the
// worker is held alive until this holder is destroyed.
class SerializedStackHolder {
// Holds any encoded stack data.
StructuredCloneHolder mHolder;
// The worker associated with this stack, or null if this is a main thread
// stack.
RefPtr<ThreadSafeWorkerRef> mWorkerRef;
// Write aStack's data into mHolder.
void WriteStack(JSContext* aCx, JS::Handle<JSObject*> aStack);
// Fill this holder with a main or worklet thread stack.
void SerializeMainThreadOrWorkletStack(JSContext* aCx,
JS::Handle<JSObject*> aStack);
// Fill this holder with a worker thread stack.
void SerializeWorkerStack(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
JS::Handle<JSObject*> aStack);
// Fill this holder with the current thread's current stack.
void SerializeCurrentStack(JSContext* aCx);
// Read back a saved frame stack. This must be called on the main thread.
// This returns null on failure, and does not leave an exception on aCx.
JSObject* ReadStack(JSContext* aCx);
// Construct a stack for the current thread, which may be consumed by the net
// monitor later on. This may be called on either the main or a worker thread.
// This always creates a stack, even if the net monitor isn't active for the
// associated window. The net monitor will only be active if the associated
// Browsing Context or worker's WatchedByDevTools flag is set, so this should
// be checked before creating the stack.
UniquePtr<SerializedStackHolder> GetCurrentStackForNetMonitor(JSContext* aCx);
// Construct a stack for the current thread.
UniquePtr<SerializedStackHolder> GetCurrentStack(JSContext* aCx);
// If aStackHolder is non-null, this notifies the net monitor that aStackHolder
// is the stack from which aChannel originates. This must be called on the main
// thread. This call is synchronous, and aChannel and aStackHolder will not be
// used afterward. aChannel is an nsISupports object because this can be used
// with either nsIChannel or nsIWebSocketChannel.
void NotifyNetworkMonitorAlternateStack(
nsISupports* aChannel, UniquePtr<SerializedStackHolder> aStackHolder);
// Read back the saved frame stack and store it in a string as JSON.
// This must be called on the main thread.
void ConvertSerializedStackToJSON(UniquePtr<SerializedStackHolder> aStackHolder,
nsAString& aStackString);
// As above, notify the net monitor for a stack that has already been converted
// to JSON. This can be used with ConvertSerializedStackToJSON when multiple
// notifications might be needed for a single stack.
void NotifyNetworkMonitorAlternateStack(nsISupports* aChannel,
const nsAString& aStackJSON);
} // namespace mozilla::dom
#endif // mozilla_dom_SerializedStackHolder_h