1 files changed, 121 insertions, 0 deletions
diff --git a/toolkit/xre/dllservices/tests/TestIATPatcher.cpp b/toolkit/xre/dllservices/tests/TestIATPatcher.cpp
new file mode 100644
index 0000000000..2f84c0541a
--- /dev/null
+++ b/toolkit/xre/dllservices/tests/TestIATPatcher.cpp
@@ -0,0 +1,121 @@
+/* -*- 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 "mozilla/Assertions.h"
+#include "mozilla/DynamicallyLinkedFunctionPtr.h"
+#include "nsWindowsDllInterceptor.h"
+#include "nsWindowsHelpers.h"
+
+#include <shlwapi.h>
+
+static int NormalImport() { return ::GetSystemMetrics(SM_CYCAPTION); }
+
+static bool DelayLoadImport() {
+  return !!::UrlIsW(L"http://example.com/", URLIS_FILEURL);
+}
+
+static mozilla::WindowsIATPatcher::FuncHookType<decltype(&::GetSystemMetrics)>
+    gGetSystemMetricsHook;
+
+static mozilla::WindowsIATPatcher::FuncHookType<decltype(&::MessageBoxA)>
+    gMessageBoxAHook;
+
+static mozilla::WindowsIATPatcher::FuncHookType<decltype(&::UrlIsW)> gUrlIsHook;
+
+static bool gGetSystemMetricsHookCalled = false;
+
+static int WINAPI GetSystemMetricsHook(int aIndex) {
+  MOZ_DIAGNOSTIC_ASSERT(aIndex == SM_CYCAPTION);
+  gGetSystemMetricsHookCalled = true;
+  return 0;
+}
+
+static bool gUrlIsHookCalled = false;
+
+static BOOL WINAPI UrlIsWHook(PCWSTR aUrl, URLIS aFlags) {
+  gUrlIsHookCalled = true;
+  return TRUE;
+}
+
+static HMODULE GetStrongReferenceToExeModule() {
+  HMODULE result;
+  if (!::GetModuleHandleExW(0, nullptr, &result)) {
+    return nullptr;
+  }
+
+  return result;
+}
+
+#define PRINT_FAIL(msg) printf("TEST-UNEXPECTED-FAIL | IATPatcher | " msg "\n")
+
+extern "C" int wmain(int argc, wchar_t* argv[]) {
+  nsModuleHandle ourModule1(GetStrongReferenceToExeModule());
+  if (!ourModule1) {
+    PRINT_FAIL("Failed obtaining HMODULE for executable");
+    return 1;
+  }
+
+  if (!gGetSystemMetricsHook.Set(ourModule1, "user32.dll", "GetSystemMetrics",
+                                 &GetSystemMetricsHook)) {
+    PRINT_FAIL("Failed setting GetSystemMetrics hook");
+    return 1;
+  }
+
+  if (NormalImport() || !gGetSystemMetricsHookCalled) {
+    PRINT_FAIL("GetSystemMetrics hook was not called");
+    return 1;
+  }
+
+  static const mozilla::StaticDynamicallyLinkedFunctionPtr<
+      decltype(&::GetSystemMetrics)>
+      pRealGetSystemMetrics(L"user32.dll", "GetSystemMetrics");
+  if (!pRealGetSystemMetrics) {
+    PRINT_FAIL("Failed resolving real GetSystemMetrics pointer");
+    return 1;
+  }
+
+  if (gGetSystemMetricsHook.GetStub() != pRealGetSystemMetrics) {
+    PRINT_FAIL(
+        "GetSystemMetrics hook stub pointer does not match real "
+        "GetSystemMetrics pointer");
+    return 1;
+  }
+
+  nsModuleHandle ourModule2(GetStrongReferenceToExeModule());
+  if (!ourModule2) {
+    PRINT_FAIL("Failed obtaining HMODULE for executable");
+    return 1;
+  }
+
+  // This should fail becuase the test never calls, and thus never imports,
+  // MessageBoxA
+  if (gMessageBoxAHook.Set(ourModule2, "user32.dll", "MessageBoxA", nullptr)) {
+    PRINT_FAIL("Setting MessageBoxA hook succeeded when it should have failed");
+    return 1;
+  }
+
+  nsModuleHandle ourModule3(GetStrongReferenceToExeModule());
+  if (!ourModule3) {
+    PRINT_FAIL("Failed obtaining HMODULE for executable");
+    return 1;
+  }
+
+  // These tests involve a delay-loaded import, which are not supported; we
+  // expect these tests to FAIL.
+
+  if (gUrlIsHook.Set(ourModule3, "shlwapi.dll", "UrlIsW", &UrlIsWHook)) {
+    PRINT_FAIL("gUrlIsHook.Set should have failed");
+    return 1;
+  }
+
+  if (DelayLoadImport() || gUrlIsHookCalled) {
+    PRINT_FAIL("gUrlIsHook should not have been called");
+    return 1;
+  }
+
+  printf("TEST-PASS | IATPatcher | All tests passed.\n");
+  return 0;
+}