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b582df1238
This is required because the script security manager which currently owns the singleton is main-thread only. This change still ties the lifecycle of the static to that service, but also makes it generally available from any thread. Differential Revision: https://phabricator.services.mozilla.com/D163035
120 lines
3.3 KiB
C++
120 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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/* The privileged system principal. */
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#include "nscore.h"
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#include "SystemPrincipal.h"
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#include "mozilla/ClearOnShutdown.h"
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#include "nsCOMPtr.h"
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#include "nsReadableUtils.h"
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#include "nsCRT.h"
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#include "nsString.h"
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#include "nsIClassInfoImpl.h"
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#include "pratom.h"
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using namespace mozilla;
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NS_IMPL_CLASSINFO(SystemPrincipal, nullptr,
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nsIClassInfo::SINGLETON | nsIClassInfo::MAIN_THREAD_ONLY,
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NS_SYSTEMPRINCIPAL_CID)
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NS_IMPL_QUERY_INTERFACE_CI(SystemPrincipal, nsIPrincipal, nsISerializable)
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NS_IMPL_CI_INTERFACE_GETTER(SystemPrincipal, nsIPrincipal, nsISerializable)
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static constexpr nsLiteralCString kSystemPrincipalSpec =
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"[System Principal]"_ns;
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SystemPrincipal::SystemPrincipal()
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: BasePrincipal(eSystemPrincipal, kSystemPrincipalSpec,
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OriginAttributes()) {}
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static StaticMutex sSystemPrincipalMutex;
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static StaticRefPtr<SystemPrincipal> sSystemPrincipal
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MOZ_GUARDED_BY(sSystemPrincipalMutex);
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already_AddRefed<SystemPrincipal> SystemPrincipal::Get() {
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StaticMutexAutoLock lock(sSystemPrincipalMutex);
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return do_AddRef(sSystemPrincipal);
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}
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already_AddRefed<SystemPrincipal> SystemPrincipal::Init() {
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AssertIsOnMainThread();
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StaticMutexAutoLock lock(sSystemPrincipalMutex);
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if (MOZ_UNLIKELY(sSystemPrincipal)) {
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MOZ_ASSERT_UNREACHABLE("SystemPrincipal::Init() may only be called once");
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} else {
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sSystemPrincipal = new SystemPrincipal();
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}
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return do_AddRef(sSystemPrincipal);
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}
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void SystemPrincipal::Shutdown() {
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AssertIsOnMainThread();
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StaticMutexAutoLock lock(sSystemPrincipalMutex);
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MOZ_ASSERT(sSystemPrincipal);
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sSystemPrincipal = nullptr;
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}
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nsresult SystemPrincipal::GetScriptLocation(nsACString& aStr) {
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aStr.Assign(kSystemPrincipalSpec);
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return NS_OK;
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}
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///////////////////////////////////////
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// Methods implementing nsIPrincipal //
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///////////////////////////////////////
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uint32_t SystemPrincipal::GetHashValue() { return NS_PTR_TO_INT32(this); }
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NS_IMETHODIMP
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SystemPrincipal::GetURI(nsIURI** aURI) {
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*aURI = nullptr;
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return NS_OK;
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}
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NS_IMETHODIMP
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SystemPrincipal::GetIsOriginPotentiallyTrustworthy(bool* aResult) {
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*aResult = true;
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return NS_OK;
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}
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NS_IMETHODIMP
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SystemPrincipal::GetDomain(nsIURI** aDomain) {
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*aDomain = nullptr;
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return NS_OK;
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}
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NS_IMETHODIMP
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SystemPrincipal::SetDomain(nsIURI* aDomain) { return NS_OK; }
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NS_IMETHODIMP
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SystemPrincipal::GetBaseDomain(nsACString& aBaseDomain) {
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// No base domain for chrome.
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return NS_OK;
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}
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NS_IMETHODIMP
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SystemPrincipal::GetAddonId(nsAString& aAddonId) {
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aAddonId.Truncate();
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return NS_OK;
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};
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//////////////////////////////////////////
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// Methods implementing nsISerializable //
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//////////////////////////////////////////
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NS_IMETHODIMP
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SystemPrincipal::Read(nsIObjectInputStream* aStream) {
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// no-op: CID is sufficient to identify the mSystemPrincipal singleton
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return NS_OK;
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}
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NS_IMETHODIMP
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SystemPrincipal::Write(nsIObjectOutputStream* aStream) {
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// Read is used still for legacy principals
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MOZ_RELEASE_ASSERT(false, "Old style serialization is removed");
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return NS_OK;
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}
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