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1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #include <stdint.h>
6 #include <windows.h>
7 
8 #include <algorithm>
9 #include <vector>
10 
11 #include "base/base_paths.h"
12 #include "base/basictypes.h"
13 #include "base/compiler_specific.h"
14 #include "base/files/file_path.h"
15 #include "base/files/memory_mapped_file.h"
16 #include "base/path_service.h"
17 #include "base/strings/string_util.h"
18 #include "base/win/pe_image.h"
19 #include "testing/gtest/include/gtest/gtest.h"
20 
21 namespace {
22 
23 class ELFImportsTest : public testing::Test {
24  protected:
ImportsCallback(const base::win::PEImage & image,LPCSTR module,PIMAGE_THUNK_DATA name_table,PIMAGE_THUNK_DATA iat,PVOID cookie)25   static bool ImportsCallback(const base::win::PEImage &image,
26                               LPCSTR module,
27                               PIMAGE_THUNK_DATA name_table,
28                               PIMAGE_THUNK_DATA iat,
29                               PVOID cookie) {
30     std::vector<std::string>* import_list =
31         reinterpret_cast<std::vector<std::string>*>(cookie);
32     import_list->push_back(module);
33     return true;
34   }
35 
GetImports(const base::FilePath & module_path,std::vector<std::string> * imports)36   void GetImports(const base::FilePath& module_path,
37                   std::vector<std::string>* imports) {
38     ASSERT_TRUE(imports != NULL);
39 
40     base::MemoryMappedFile module_mmap;
41 
42     ASSERT_TRUE(module_mmap.Initialize(module_path));
43     base::win::PEImageAsData pe_image_data(
44         reinterpret_cast<HMODULE>(const_cast<uint8*>(module_mmap.data())));
45     pe_image_data.EnumImportChunks(ELFImportsTest::ImportsCallback, imports);
46   }
47 };
48 
TEST_F(ELFImportsTest,ChromeElfSanityCheck)49 TEST_F(ELFImportsTest, ChromeElfSanityCheck) {
50   std::vector<std::string> elf_imports;
51 
52   base::FilePath dll;
53   ASSERT_TRUE(PathService::Get(base::DIR_EXE, &dll));
54   dll = dll.Append(L"chrome_elf.dll");
55   GetImports(dll, &elf_imports);
56 
57   // Check that ELF has imports.
58   ASSERT_LT(0u, elf_imports.size()) << "Ensure the chrome_elf_unittests "
59     "target was built, instead of chrome_elf_unittests.exe";
60 
61   std::vector<std::string>::iterator it(elf_imports.begin());
62 
63   static const char* const kValidFilePatterns[] = {
64     "KERNEL32.dll",
65     "MSVC*",
66 #if defined(SYZYASAN)
67     "syzyasan_rtl.dll",
68 #endif
69     "ADVAPI32.dll"
70   };
71 
72   // Make sure all of ELF's imports are in the valid imports list.
73   for (; it != elf_imports.end(); it++) {
74     bool match = false;
75     for (int i = 0; i < arraysize(kValidFilePatterns); ++i) {
76       if (MatchPattern(*it, kValidFilePatterns[i]))
77         match = true;
78     }
79     ASSERT_TRUE(match) << "Illegal import in chrome_elf.dll.";
80   }
81 }
82 
TEST_F(ELFImportsTest,ChromeExeSanityCheck)83 TEST_F(ELFImportsTest, ChromeExeSanityCheck) {
84   std::vector<std::string> exe_imports;
85 
86   base::FilePath exe;
87   ASSERT_TRUE(PathService::Get(base::DIR_EXE, &exe));
88   exe = exe.Append(L"chrome.exe");
89   GetImports(exe, &exe_imports);
90 
91   // Check that chrome.exe has imports.
92   ASSERT_LT(0u, exe_imports.size()) << "Ensure the chrome_elf_unittests "
93     "target was built, instead of chrome_elf_unittests.exe";
94 
95   // Chrome.exe's first import must be ELF.
96   EXPECT_EQ("chrome_elf.dll", exe_imports[0]) <<
97       "Illegal import order in chrome.exe (ensure the chrome_elf_unittest "
98       "target was built, instead of just chrome_elf_unittests.exe)";
99 }
100 
101 }  // namespace
102