80 lines
2.3 KiB
C++
80 lines
2.3 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/message_loop/message_loop.h"
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#include "base/win/wrapped_window_proc.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace {
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DWORD kExceptionCode = 12345;
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WPARAM kCrashMsg = 98765;
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// A trivial WindowProc that generates an exception.
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LRESULT CALLBACK TestWindowProc(HWND hwnd, UINT message,
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WPARAM wparam, LPARAM lparam) {
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if (message == kCrashMsg)
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RaiseException(kExceptionCode, 0, 0, NULL);
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return DefWindowProc(hwnd, message, wparam, lparam);
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}
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// This class implements an exception filter that can be queried about a past
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// exception.
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class TestWrappedExceptionFiter {
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public:
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TestWrappedExceptionFiter() : called_(false) {
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EXPECT_FALSE(s_filter_);
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s_filter_ = this;
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}
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~TestWrappedExceptionFiter() {
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EXPECT_EQ(s_filter_, this);
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s_filter_ = NULL;
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}
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bool called() {
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return called_;
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}
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// The actual exception filter just records the exception.
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static int Filter(EXCEPTION_POINTERS* info) {
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EXPECT_FALSE(s_filter_->called_);
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if (info->ExceptionRecord->ExceptionCode == kExceptionCode)
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s_filter_->called_ = true;
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return EXCEPTION_EXECUTE_HANDLER;
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}
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private:
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bool called_;
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static TestWrappedExceptionFiter* s_filter_;
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};
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TestWrappedExceptionFiter* TestWrappedExceptionFiter::s_filter_ = NULL;
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} // namespace.
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TEST(WrappedWindowProc, CatchesExceptions) {
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HINSTANCE hinst = GetModuleHandle(NULL);
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std::wstring class_name(L"TestClass");
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WNDCLASS wc = {0};
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wc.lpfnWndProc = base::win::WrappedWindowProc<TestWindowProc>;
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wc.hInstance = hinst;
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wc.lpszClassName = class_name.c_str();
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RegisterClass(&wc);
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HWND window = CreateWindow(class_name.c_str(), 0, 0, 0, 0, 0, 0, HWND_MESSAGE,
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0, hinst, 0);
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ASSERT_TRUE(window);
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// Before generating the exception we make sure that the filter will see it.
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TestWrappedExceptionFiter wrapper;
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base::win::WinProcExceptionFilter old_filter =
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base::win::SetWinProcExceptionFilter(TestWrappedExceptionFiter::Filter);
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SendMessage(window, kCrashMsg, 0, 0);
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EXPECT_TRUE(wrapper.called());
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base::win::SetWinProcExceptionFilter(old_filter);
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}
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