1 files changed, 139 insertions, 0 deletions
diff --git a/security/sandbox/common/test/SandboxTestingChild.cpp b/security/sandbox/common/test/SandboxTestingChild.cpp
new file mode 100644
index 0000000000..be68b2ba46
--- /dev/null
+++ b/security/sandbox/common/test/SandboxTestingChild.cpp
@@ -0,0 +1,139 @@
+/* -*- 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 "SandboxTestingThread.h"
+
+#include "nsXULAppAPI.h"
+
+#ifdef XP_UNIX
+#  include <fcntl.h>
+#  include <sys/stat.h>
+#  include <sys/types.h>
+#  include <time.h>
+#  include <unistd.h>
+#endif
+
+namespace mozilla {
+
+SandboxTestingChild* SandboxTestingChild::sInstance = nullptr;
+
+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));
+  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) {
+  MOZ_ASSERT(aThread);
+  PostToTestThread(NewNonOwningRunnableMethod<Endpoint<PSandboxTestingChild>&&>(
+      "SandboxTestingChild::Bind", this, &SandboxTestingChild::Bind,
+      std::move(aEndpoint)));
+}
+
+void SandboxTestingChild::Bind(Endpoint<PSandboxTestingChild>&& aEndpoint) {
+  MOZ_RELEASE_ASSERT(mThread->IsOnThread());
+  DebugOnly<bool> ok = aEndpoint.Bind(this);
+  MOZ_ASSERT(ok);
+
+  if (XRE_IsContentProcess()) {
+#ifdef XP_UNIX
+    struct stat st;
+    static const char kAllowedPath[] = "/usr/lib";
+
+    ErrnoTest("fstatat_as_stat"_ns, true,
+              [&] { return fstatat(AT_FDCWD, kAllowedPath, &st, 0); });
+    ErrnoTest("fstatat_as_lstat"_ns, true, [&] {
+      return fstatat(AT_FDCWD, kAllowedPath, &st, AT_SYMLINK_NOFOLLOW);
+    });
+
+#  ifdef XP_LINUX
+    ErrnoTest("fstatat_as_fstat"_ns, true,
+              [&] { return fstatat(0, "", &st, AT_EMPTY_PATH); });
+#  endif  // XP_LINUX
+
+    const struct timespec usec = {0, 1000};
+    ErrnoTest("nanosleep"_ns, true, [&] { return nanosleep(&usec, nullptr); });
+
+    struct timespec res = {0, 0};
+    ErrnoTest("clock_getres"_ns, true,
+              [&] { return clock_getres(CLOCK_REALTIME, &res); });
+
+#else   // XP_UNIX
+    SendReportTestResults("dummy_test"_ns,
+                          /* shouldSucceed */ true,
+                          /* didSucceed */ true,
+                          "The test framework fails if there are no cases."_ns);
+#endif  // XP_UNIX
+  }
+
+  // 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);
+  delete sInstance;
+  sInstance = nullptr;
+}
+
+bool SandboxTestingChild::RecvShutDown() {
+  Close();
+  return true;
+}
+
+#ifdef XP_UNIX
+template <typename F>
+void SandboxTestingChild::ErrnoTest(const nsCString& aName, bool aExpectSuccess,
+                                    F&& aFunction) {
+  int status = aFunction() >= 0 ? 0 : errno;
+  PosixTest(aName, aExpectSuccess, status);
+}
+
+void SandboxTestingChild::PosixTest(const nsCString& aName, bool aExpectSuccess,
+                                    int aStatus) {
+  bool succeeded = aStatus == 0;
+  nsAutoCString message;
+  if (succeeded) {
+    message = "Succeeded"_ns;
+  } else {
+    message.AppendPrintf("Error: %s", strerror(aStatus));
+  }
+
+  SendReportTestResults(aName, aExpectSuccess, succeeded, message);
+}
+#endif  // XP_UNIX
+
+}  // namespace mozilla