chrome_elf/elf_imports_unittest.cc

   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:
  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
  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
  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
  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