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020963a272
BasicDllServices is a simplified implementation that allows programs other than Firefox to link against mozglue and access DLL services without requiring any XPCOM baggage.
134 lines
3.2 KiB
C++
134 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_glue_WindowsDllServices_h
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#define mozilla_glue_WindowsDllServices_h
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#include "mozilla/Authenticode.h"
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#include "mozilla/WindowsDllBlocklist.h"
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#if defined(MOZILLA_INTERNAL_API)
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#include "mozilla/SystemGroup.h"
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#include "nsISupportsImpl.h"
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#include "nsString.h"
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#include "nsThreadUtils.h"
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#endif // defined(MOZILLA_INTERNAL_API)
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// For PCUNICODE_STRING
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#include <winternl.h>
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namespace mozilla {
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namespace glue {
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namespace detail {
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class DllServicesBase : public Authenticode
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{
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public:
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/**
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* WARNING: This method is called from within an unsafe context that holds
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* multiple locks inside the Windows loader. The only thing that
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* this function should be used for is dispatching the event to our
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* event loop so that it may be handled in a safe context.
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*/
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virtual void DispatchDllLoadNotification(PCUNICODE_STRING aDllName) = 0;
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void SetAuthenticodeImpl(Authenticode* aAuthenticode)
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{
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mAuthenticode = aAuthenticode;
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}
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UniquePtr<wchar_t[]> GetBinaryOrgName(const wchar_t* aFilePath) final
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{
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if (!mAuthenticode) {
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return nullptr;
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}
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return mAuthenticode->GetBinaryOrgName(aFilePath);
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}
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void Disable()
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{
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DllBlocklist_SetDllServices(nullptr);
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}
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DllServicesBase(const DllServicesBase&) = delete;
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DllServicesBase(DllServicesBase&&) = delete;
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DllServicesBase& operator=(const DllServicesBase&) = delete;
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DllServicesBase& operator=(DllServicesBase&&) = delete;
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protected:
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DllServicesBase()
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: mAuthenticode(nullptr)
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{
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}
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virtual ~DllServicesBase() = default;
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void Enable()
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{
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DllBlocklist_SetDllServices(this);
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}
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private:
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Authenticode* mAuthenticode;
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};
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} // namespace detail
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#if defined(MOZILLA_INTERNAL_API)
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class DllServices : public detail::DllServicesBase
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{
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public:
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void DispatchDllLoadNotification(PCUNICODE_STRING aDllName) final
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{
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nsDependentSubstring strDllName(aDllName->Buffer,
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aDllName->Length / sizeof(wchar_t));
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nsCOMPtr<nsIRunnable> runnable(
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NewRunnableMethod<bool, nsString>("DllServices::NotifyDllLoad",
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this, &DllServices::NotifyDllLoad,
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NS_IsMainThread(), strDllName));
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SystemGroup::Dispatch(TaskCategory::Other, runnable.forget());
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}
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NS_INLINE_DECL_THREADSAFE_VIRTUAL_REFCOUNTING(DllServices)
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protected:
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DllServices() = default;
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~DllServices() = default;
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virtual void NotifyDllLoad(const bool aIsMainThread, const nsString& aDllName) = 0;
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};
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#else
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class BasicDllServices : public detail::DllServicesBase
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{
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public:
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BasicDllServices()
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{
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Enable();
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}
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~BasicDllServices()
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{
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Disable();
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}
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virtual void DispatchDllLoadNotification(PCUNICODE_STRING aDllName) override {}
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};
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#endif // defined(MOZILLA_INTERNAL_API)
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} // namespace glue
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} // namespace mozilla
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#endif // mozilla_glue_WindowsDllServices_h
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