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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 https://mozilla.org/MPL/2.0/. */
#ifndef mozilla_UntrustedModulesProcessor_h
#define mozilla_UntrustedModulesProcessor_h
#include "mozilla/Atomics.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/glue/WindowsDllServices.h"
#include "mozilla/LazyIdleThread.h"
#include "mozilla/Maybe.h"
#include "mozilla/MozPromise.h"
#include "mozilla/RefPtr.h"
#include "mozilla/UntrustedModulesData.h"
#include "mozilla/Vector.h"
#include "mozilla/WinHeaderOnlyUtils.h"
#include "nsCOMPtr.h"
#include "nsIObserver.h"
#include "nsIRunnable.h"
#include "nsISupportsImpl.h"
#include "nsString.h"
namespace mozilla {
class ModuleEvaluator;
using UntrustedModulesPromise =
MozPromise<Maybe<UntrustedModulesData>, nsresult, true>;
using ModulesTrustPromise = MozPromise<ModulesMapResult, nsresult, true>;
using GetModulesTrustIpcPromise =
MozPromise<Maybe<ModulesMapResult>, ipc::ResponseRejectReason, true>;
class UntrustedModulesProcessor final : public nsIObserver {
public:
static RefPtr<UntrustedModulesProcessor> Create();
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIOBSERVER
// Called by DLL Services to explicitly begin shutting down
void Disable();
// Called by DLL Services to submit module load data to the processor
void Enqueue(glue::EnhancedModuleLoadInfo&& aModLoadInfo);
void Enqueue(ModuleLoadInfoVec&& aEvents);
// Called by telemetry to retrieve the processed data
RefPtr<UntrustedModulesPromise> GetProcessedData();
// Called by IPC actors in the parent process to evaluate module trust
// on behalf of child processes
RefPtr<ModulesTrustPromise> GetModulesTrust(ModulePaths&& aModPaths,
bool aRunAtNormalPriority);
UntrustedModulesProcessor(const UntrustedModulesProcessor&) = delete;
UntrustedModulesProcessor(UntrustedModulesProcessor&&) = delete;
UntrustedModulesProcessor& operator=(const UntrustedModulesProcessor&) =
delete;
UntrustedModulesProcessor& operator=(UntrustedModulesProcessor&&) = delete;
private:
~UntrustedModulesProcessor() = default;
UntrustedModulesProcessor();
static bool IsSupportedProcessType();
void AddObservers();
void RemoveObservers();
void ScheduleNonEmptyQueueProcessing(const MutexAutoLock& aProofOfLock);
void CancelScheduledProcessing(const MutexAutoLock& aProofOfLock);
void DispatchBackgroundProcessing();
void BackgroundProcessModuleLoadQueue();
void ProcessModuleLoadQueue();
using LoadsVec = Vector<glue::EnhancedModuleLoadInfo>;
class ModulesMapResultWithLoads final {
public:
ModulesMapResultWithLoads(Maybe<ModulesMapResult>&& aModMapResult,
LoadsVec&& aLoads)
: mModMapResult(std::move(aModMapResult)), mLoads(std::move(aLoads)) {}
Maybe<ModulesMapResult> mModMapResult;
LoadsVec mLoads;
};
using GetModulesTrustPromise =
MozPromise<Maybe<ModulesMapResultWithLoads>, nsresult, true>;
enum class Priority { Default, Background };
RefPtr<GetModulesTrustPromise> ProcessModuleLoadQueueChildProcess(
Priority aPriority);
void BackgroundProcessModuleLoadQueueChildProcess();
void AssertRunningOnLazyIdleThread();
RefPtr<UntrustedModulesPromise> GetProcessedDataInternal();
RefPtr<UntrustedModulesPromise> GetProcessedDataInternalChildProcess();
RefPtr<ModulesTrustPromise> GetModulesTrustInternal(
ModulePaths&& aModPaths, bool aRunAtNormalPriority);
RefPtr<ModulesTrustPromise> GetModulesTrustInternal(ModulePaths&& aModPaths);
// These two functions are only called by the parent process
RefPtr<ModuleRecord> GetOrAddModuleRecord(
ModulesMap& aModules, const ModuleEvaluator& aModEval,
const glue::EnhancedModuleLoadInfo& aModLoadInfo);
RefPtr<ModuleRecord> GetOrAddModuleRecord(ModulesMap& aModules,
const ModuleEvaluator& aModEval,
const nsAString& aResolvedNtPath);
// Only called by child processes
RefPtr<ModuleRecord> GetModuleRecord(
const ModulesMap& aModules,
const glue::EnhancedModuleLoadInfo& aModuleLoadInfo);
RefPtr<GetModulesTrustIpcPromise> SendGetModulesTrust(ModulePaths&& aModules,
Priority aPriority);
void CompleteProcessing(ModulesMapResultWithLoads&& aModulesAndLoads);
RefPtr<UntrustedModulesPromise> GetAllProcessedData(const char* aSource);
private:
RefPtr<LazyIdleThread> mThread;
Mutex mUnprocessedMutex;
// The members in this group are protected by mUnprocessedMutex
Vector<glue::EnhancedModuleLoadInfo> mUnprocessedModuleLoads;
nsCOMPtr<nsIRunnable> mIdleRunnable;
// This member must only be touched on mThread
UntrustedModulesData mProcessedModuleLoads;
// This member may be touched by any thread
Atomic<bool> mAllowProcessing;
// This member must only be touched on mThread, making sure a hash table of
// dependent modules is initialized once in a process when the first batch
// of queued events is processed. We don't need the hash table to process
// subsequent queues because we're interested in modules imported via the
// executable's Import Table which are all expected to be in the first queue.
// A boolean flag is enough to control initialization because tasks of
// processing queues are serialized.
bool mIsFirstBatchProcessed;
};
} // namespace mozilla
#endif // mozilla_UntrustedModulesProcessor_h
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