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/pattern.h"
  18 #include "base/strings/string_util.h"
  19 #include "base/win/pe_image.h"
  20 #include "testing/gtest/include/gtest/gtest.h"
  21
  22 namespace {
  23
  24 class ELFImportsTest : public testing::Test {
  25  protected:
  26   static bool ImportsCallback(const base::win::PEImage &image,
  27                               LPCSTR module,
  28                               PIMAGE_THUNK_DATA name_table,
  29                               PIMAGE_THUNK_DATA iat,
  30                               PVOID cookie) {
  31     std::vector<std::string>* import_list =
  32         reinterpret_cast<std::vector<std::string>*>(cookie);
  33     import_list->push_back(module);
  34     return true;
  35   }
  36
  37   void GetImports(const base::FilePath& module_path,
  38                   std::vector<std::string>* imports) {
  39     ASSERT_TRUE(imports != NULL);
  40
  41     base::MemoryMappedFile module_mmap;
  42
  43     ASSERT_TRUE(module_mmap.Initialize(module_path));
  44     base::win::PEImageAsData pe_image_data(
  45         reinterpret_cast<HMODULE>(const_cast<uint8*>(module_mmap.data())));
  46     pe_image_data.EnumImportChunks(ELFImportsTest::ImportsCallback, imports);
  47   }
  48 };
  49
  50 TEST_F(ELFImportsTest, ChromeElfSanityCheck) {
  51   std::vector<std::string> elf_imports;
  52
  53   base::FilePath dll;
  54   ASSERT_TRUE(PathService::Get(base::DIR_EXE, &dll));
  55   dll = dll.Append(L"chrome_elf.dll");
  56   GetImports(dll, &elf_imports);
  57
  58   // Check that ELF has imports.
  59   ASSERT_LT(0u, elf_imports.size()) << "Ensure the chrome_elf_unittests "
  60     "target was built, instead of chrome_elf_unittests.exe";
  61
  62   std::vector<std::string>::iterator it(elf_imports.begin());
  63
  64   static const char* const kValidFilePatterns[] = {
  65     "KERNEL32.dll",
  66     "MSVC*",
  67 #if defined(SYZYASAN)
  68     "syzyasan_rtl.dll",
  69 #endif
  70 #if defined(ADDRESS_SANITIZER) && defined(COMPONENT_BUILD)
  71     "clang_rt.asan_dynamic-i386.dll",
  72 #endif
  73     "ADVAPI32.dll"
  74   };
  75
  76   // Make sure all of ELF's imports are in the valid imports list.
  77   for (; it != elf_imports.end(); it++) {
  78     bool match = false;
  79     for (int i = 0; i < arraysize(kValidFilePatterns); ++i) {
  80       if (base::MatchPattern(*it, kValidFilePatterns[i]))
  81         match = true;
  82     }
  83     ASSERT_TRUE(match) << "Illegal import in chrome_elf.dll: " << *it;
  84   }
  85 }
  86
  87 TEST_F(ELFImportsTest, ChromeExeSanityCheck) {
  88   std::vector<std::string> exe_imports;
  89
  90   base::FilePath exe;
  91   ASSERT_TRUE(PathService::Get(base::DIR_EXE, &exe));
  92   exe = exe.Append(L"chrome.exe");
  93   GetImports(exe, &exe_imports);
  94
  95   // Check that chrome.exe has imports.
  96   ASSERT_LT(0u, exe_imports.size()) << "Ensure the chrome_elf_unittests "
  97     "target was built, instead of chrome_elf_unittests.exe";
  98
  99   // Chrome.exe's first import must be ELF.
 100   EXPECT_EQ("chrome_elf.dll", exe_imports[0]) <<
 101       "Illegal import order in chrome.exe (ensure the chrome_elf_unittest "
 102       "target was built, instead of just chrome_elf_unittests.exe)";
 103 }
 104
 105 }  // namespace