win: Fix ProcessInfo test when running on x86 host OS

util/win/process_info_test.cc

 // Copyright 2015 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 23 matching lines @@
 
 time_t GetTimestampForModule(HMODULE module) {
   char filename[MAX_PATH];
   // `char` and GetModuleFileNameA because ImageLoad is ANSI only.
   if (!GetModuleFileNameA(module, filename, arraysize(filename)))
     return 0;
   LOADED_IMAGE* loaded_image = ImageLoad(filename, nullptr);
   return loaded_image->FileHeader->FileHeader.TimeDateStamp;
 }
 
+bool IsProcessWow64(HANDLE process_handle) {
+  static decltype(IsWow64Process)* is_wow64_process =
+      reinterpret_cast<decltype(IsWow64Process)*>(
+          GetProcAddress(LoadLibrary(L"kernel32.dll"), "IsWow64Process"));
+  if (!is_wow64_process)
+    return false;
+  BOOL is_wow64;
+  if (!is_wow64_process(process_handle, &is_wow64)) {
+    PLOG(ERROR) << "IsWow64Process";
+    return false;
+  }
+  return is_wow64;
+}
+
 TEST(ProcessInfo, Self) {
   ProcessInfo process_info;
   ASSERT_TRUE(process_info.Initialize(GetCurrentProcess()));
   EXPECT_EQ(GetCurrentProcessId(), process_info.ProcessID());
   EXPECT_GT(process_info.ParentProcessID(), 0u);
 
 #if defined(ARCH_CPU_64_BITS)
   EXPECT_TRUE(process_info.Is64Bit());
   EXPECT_FALSE(process_info.IsWow64());
 #else
   EXPECT_FALSE(process_info.Is64Bit());
-  // Assume we won't be running these tests on a 32 bit host OS.
-  EXPECT_TRUE(process_info.IsWow64());
+  if (IsProcessWow64(GetCurrentProcess()))
+    EXPECT_TRUE(process_info.IsWow64());
+  else
+    EXPECT_FALSE(process_info.IsWow64());
 #endif
 
   std::wstring command_line;
   EXPECT_TRUE(process_info.CommandLine(&command_line));
   EXPECT_EQ(std::wstring(GetCommandLine()), command_line);
 
   std::vector<ProcessInfo::Module> modules;
   EXPECT_TRUE(process_info.Modules(&modules));
   ASSERT_GE(modules.size(), 2u);
   const wchar_t kSelfName[] = L"\\crashpad_util_test.exe";
@@ skipping 94 matching lines @@
   TestOtherProcess(L"x64");
 }
 
 TEST(ProcessInfo, OtherProcessX86) {
   TestOtherProcess(L"x86");
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace crashpad