tor-browser

SandboxTestingChild.cpp (5609B)

---

/* -*- 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/. */

#include "SandboxTestingChild.h"
#include "SandboxTestingChildTests.h"
#include "SandboxTestingThread.h"
#include "mozilla/ipc/Endpoint.h"
#include "mozilla/ipc/UtilityProcessSandboxing.h"
#include "mozilla/ipc/UtilityProcessChild.h"

#ifdef XP_LINUX
#  include "mozilla/Sandbox.h"
#endif

#include "nsXULAppAPI.h"

namespace mozilla {

StaticRefPtr<SandboxTestingChild> SandboxTestingChild::sInstance;

bool SandboxTestingChild::IsTestThread() { return mThread->IsOnThread(); }

void SandboxTestingChild::PostToTestThread(
   already_AddRefed<nsIRunnable>&& runnable) {
 mThread->Dispatch(std::move(runnable));
}

/* static */
bool SandboxTestingChild::Initialize(
   Endpoint<PSandboxTestingChild>&& aSandboxTestingEndpoint) {
 MOZ_ASSERT(!sInstance);
 SandboxTestingThread* thread = SandboxTestingThread::Create();
 if (!thread) {
   return false;
 }
 sInstance =
     new SandboxTestingChild(thread, std::move(aSandboxTestingEndpoint));
 thread->Dispatch(NewRunnableMethod<Endpoint<PSandboxTestingChild>&&>(
     "SandboxTestingChild::Bind", sInstance.get(), &SandboxTestingChild::Bind,
     std::move(aSandboxTestingEndpoint)));
 return true;
}

/* static */
SandboxTestingChild* SandboxTestingChild::GetInstance() {
 MOZ_ASSERT(sInstance, "Must initialize SandboxTestingChild before using it");
 return sInstance;
}

SandboxTestingChild::SandboxTestingChild(
   SandboxTestingThread* aThread, Endpoint<PSandboxTestingChild>&& aEndpoint)
   : mThread(aThread) {}

SandboxTestingChild::~SandboxTestingChild() = default;

void SandboxTestingChild::Bind(Endpoint<PSandboxTestingChild>&& aEndpoint) {
 MOZ_RELEASE_ASSERT(mThread->IsOnThread());
 DebugOnly<bool> ok = aEndpoint.Bind(this);
 MOZ_ASSERT(ok);

#ifdef XP_LINUX
 bool sandboxCrashOnError = SetSandboxCrashOnError(false);
#endif

 if (XRE_IsContentProcess()) {
   RunTestsContent(this);
 }

 if (XRE_IsRDDProcess()) {
   RunTestsRDD(this);
 }

 if (XRE_IsGMPluginProcess()) {
   RunTestsGMPlugin(this);
 }

 if (XRE_IsSocketProcess()) {
   RunTestsSocket(this);
 }

 if (XRE_IsGPUProcess()) {
   RunTestsGPU(this);
 }

 if (XRE_IsUtilityProcess()) {
   RefPtr<ipc::UtilityProcessChild> s = ipc::UtilityProcessChild::Get();
   MOZ_ASSERT(s, "Unable to grab a UtilityProcessChild");
   switch (s->mSandbox) {
     case ipc::SandboxingKind::GENERIC_UTILITY:
       RunTestsGenericUtility(this);
       RunTestsUtilityMediaService(this, s->mSandbox);
       break;
#ifdef MOZ_APPLEMEDIA
     case ipc::SandboxingKind::UTILITY_AUDIO_DECODING_APPLE_MEDIA:
       RunTestsUtilityMediaService(this, s->mSandbox);
       break;
#endif
#ifdef XP_WIN
     case ipc::SandboxingKind::UTILITY_AUDIO_DECODING_WMF:
       RunTestsUtilityMediaService(this, s->mSandbox);
       break;
#endif

     default:
       MOZ_ASSERT(false, "Invalid SandboxingKind");
       break;
   }
 }

#ifdef XP_LINUX
 SetSandboxCrashOnError(sandboxCrashOnError);
#endif

 // Tell SandboxTest that this process is done with all tests.
 SendTestCompleted();
}

void SandboxTestingChild::ActorDestroy(ActorDestroyReason aWhy) {
 MOZ_ASSERT(mThread->IsOnThread());
 NS_DispatchToMainThread(NS_NewRunnableFunction(
     "SandboxChildDestroyer", []() { SandboxTestingChild::Destroy(); }));
}

void SandboxTestingChild::Destroy() {
 MOZ_ASSERT(NS_IsMainThread());
 MOZ_ASSERT(sInstance);
 sInstance = nullptr;
}

ipc::IPCResult SandboxTestingChild::RecvShutDown() {
 Close();
 return IPC_OK();
}

void SandboxTestingChild::ReportNoTests() {
 SendReportTestResults("dummy_test"_ns, /* passed */ true,
                       "The test framework fails if there are no cases."_ns);
}

template <typename F>
void SandboxTestingChild::ErrnoTest(const nsCString& aName, bool aExpectSuccess,
                                   F&& aFunction) {
 int status = aFunction() >= 0 ? 0 : errno;
 PosixTest(aName, aExpectSuccess, status);
}

template <typename F>
void SandboxTestingChild::ErrnoValueTest(const nsCString& aName,
                                        int aExpectedErrno, F&& aFunction) {
 int status = aFunction() >= 0 ? 0 : errno;
 PosixTest(aName, aExpectedErrno == 0, status, Some(aExpectedErrno));
}

void SandboxTestingChild::PosixTest(const nsCString& aName, bool aExpectSuccess,
                                   int aStatus, Maybe<int> aExpectedError) {
 nsAutoCString message;
 bool passed;

 // The "expected" arguments are a little redundant.
 MOZ_ASSERT(!aExpectedError || aExpectSuccess == (*aExpectedError == 0));

 // Decide whether the test passed, and stringify the actual result.
 if (aStatus == 0) {
   message = "Succeeded"_ns;
   passed = aExpectSuccess;
 } else {
   message = "Error: "_ns;
   message += strerror(aStatus);
   if (aExpectedError) {
     passed = aStatus == *aExpectedError;
   } else {
     passed = !aExpectSuccess;
   }
 }

 // If something unexpected happened, mention the expected result.
 if (!passed) {
   message += "; expected ";
   if (aExpectSuccess) {
     message += "success";
   } else {
     message += "error";
     if (aExpectedError) {
       message += ": ";
       message += strerror(*aExpectedError);
     }
   }
 }

 SendReportTestResults(aName, passed, message);
}

}  // namespace mozilla