2023-01-28 04:54:20 +00:00
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// Copyright 2015 The Crashpad Authors
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2022-04-02 01:21:55 +00:00
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "util/win/get_function.h"
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#include <windows.h>
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#include <winternl.h>
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#include "gtest/gtest.h"
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namespace crashpad {
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namespace test {
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namespace {
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TEST(GetFunction, GetFunction) {
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// Check equivalence of GET_FUNCTION_REQUIRED() with functions that are
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// available in the SDK normally.
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EXPECT_EQ(GET_FUNCTION_REQUIRED(L"kernel32.dll", GetProcAddress),
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&GetProcAddress);
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EXPECT_EQ(GET_FUNCTION_REQUIRED(L"kernel32.dll", LoadLibraryW),
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&LoadLibraryW);
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// Make sure that a function pointer retrieved by GET_FUNCTION_REQUIRED() can
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// be called and that it works correctly.
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const auto get_current_process_id =
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GET_FUNCTION_REQUIRED(L"kernel32.dll", GetCurrentProcessId);
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EXPECT_EQ(get_current_process_id, &GetCurrentProcessId);
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ASSERT_TRUE(get_current_process_id);
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EXPECT_EQ(get_current_process_id(), GetCurrentProcessId());
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// GET_FUNCTION_REQUIRED() and GET_FUNCTION() should behave identically when
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// the function is present.
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EXPECT_EQ(GET_FUNCTION(L"kernel32.dll", GetCurrentProcessId),
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get_current_process_id);
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// Using a leading :: should also work.
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EXPECT_EQ(GET_FUNCTION(L"kernel32.dll", ::GetCurrentProcessId),
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get_current_process_id);
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EXPECT_EQ(GET_FUNCTION_REQUIRED(L"kernel32.dll", ::GetCurrentProcessId),
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get_current_process_id);
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// Try a function that’s declared in the SDK’s headers but that has no import
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// library.
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EXPECT_TRUE(GET_FUNCTION_REQUIRED(L"ntdll.dll", RtlNtStatusToDosError));
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// GetNamedPipeClientProcessId() is only available on Vista and later.
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const auto get_named_pipe_client_process_id =
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GET_FUNCTION(L"kernel32.dll", GetNamedPipeClientProcessId);
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const DWORD version = GetVersion();
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const DWORD major_version = LOBYTE(LOWORD(version));
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EXPECT_EQ(get_named_pipe_client_process_id != nullptr, major_version >= 6);
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// Test that GET_FUNCTION() can fail by trying a nonexistent library and a
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// symbol that doesn’t exist in the specified library.
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EXPECT_FALSE(GET_FUNCTION(L"not_a_real_library.dll", TerminateProcess));
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EXPECT_FALSE(GET_FUNCTION(L"ntdll.dll", TerminateProcess));
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EXPECT_FALSE(GET_FUNCTION(L"not_a_real_library.dll", ::TerminateProcess));
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EXPECT_FALSE(GET_FUNCTION(L"ntdll.dll", ::TerminateProcess));
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// Here it is!
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EXPECT_TRUE(GET_FUNCTION(L"kernel32.dll", TerminateProcess));
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EXPECT_TRUE(GET_FUNCTION(L"kernel32.dll", ::TerminateProcess));
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}
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} // namespace
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} // namespace test
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} // namespace crashpad
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