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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:
     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
    102