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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 http://mozilla.org/MPL/2.0/. */
#ifndef UntrustedModulesDataSerializer_h__
#define UntrustedModulesDataSerializer_h__
#include "js/TypeDecls.h"
#include "mozilla/UntrustedModulesData.h"
#include "mozilla/Vector.h"
#include "nsDataHashtable.h"
#include "UntrustedModulesBackupService.h"
namespace mozilla {
namespace Telemetry {
// This class owns a JS object and serializes a given UntrustedModulesData
// into it. Because this class uses JSAPI, an AutoJSAPI instance must be
// on the stack before instanciating the class.
class MOZ_RAII UntrustedModulesDataSerializer final {
using IndexMap = nsDataHashtable<nsStringHashKey, uint32_t>;
nsresult mCtorResult;
JSContext* mCx;
JS::RootedObject mMainObj;
JS::RootedObject mModulesArray;
JS::RootedObject mPerProcObjContainer;
IndexMap mIndexMap;
const uint32_t mMaxModulesArrayLen;
uint32_t mCurModulesArrayIdx;
// Combinations of the flags defined under nsITelemetry.
// (See "Flags for getUntrustedModuleLoadEvents" in nsITelemetry.idl)
const uint32_t mFlags;
static bool SerializeEvent(JSContext* aCx, JS::MutableHandleValue aElement,
const ProcessedModuleLoadEvent& aEvent,
const IndexMap& aModuleIndices);
nsresult GetPerProcObject(const UntrustedModulesData& aData,
JS::MutableHandleObject aObj);
nsresult AddLoadEvents(const Vector<ProcessedModuleLoadEvent>& aEvents,
JS::MutableHandleObject aPerProcObj);
nsresult AddSingleData(const UntrustedModulesData& aData);
public:
UntrustedModulesDataSerializer(JSContext* aCx, uint32_t aMaxModulesArrayLen,
uint32_t aFlags = 0);
explicit operator bool() const;
/**
* Retrieves the JS object.
*
* @param aRet [out] This gets assigned to the newly created object.
*/
void GetObject(JS::MutableHandleValue aRet);
/**
* Adds data to the JS object.
*
* When the process of a given UntrustedModulesData collides with a key in
* the JS object, the entire UntrustedModulesData instance in the JS object
* will be replaced unless EXCLUDE_STACKINFO_FROM_LOADEVENTS is set.
* When EXCLUDE_STACKINFO_FROM_LOADEVENTS is set, the given loading events
* are appended into the JS object, keeping the existing data as is.
*
* @param aData [in] The source objects to add.
* @return nsresult
*/
nsresult Add(const UntrustedModulesBackupData& aData);
};
} // namespace Telemetry
} // namespace mozilla
#endif // UntrustedModulesDataSerializer_h__
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