llvm/unittests/BinaryFormat/TestFileMagic.cpp

   1 //===- llvm/unittest/BinaryFormat/TestFileMagic.cpp - File magic tests ----===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/ADT/SmallString.h"
  10 #include "llvm/ADT/StringRef.h"
  11 #include "llvm/BinaryFormat/Magic.h"
  12 #include "llvm/Support/FileSystem.h"
  13 #include "llvm/Support/Path.h"
  14
  15 #include "gtest/gtest.h"
  16
  17 using namespace llvm;
  18 namespace fs = llvm::sys::fs;
  19
  20 #define ASSERT_NO_ERROR(x)                                                     \
  21   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
  22     SmallString<128> MessageStorage;                                           \
  23     raw_svector_ostream Message(MessageStorage);                               \
  24     Message << #x ": did not return errc::success.\n"                          \
  25             << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
  26             << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
  27     GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
  28   } else {                                                                     \
  29   }
  30
  31 class MagicTest : public testing::Test {
  32 protected:
  33   /// Unique temporary directory in which all created filesystem entities must
  34   /// be placed. It is removed at the end of each test (must be empty).
  35   SmallString<128> TestDirectory;
  36
  37   void SetUp() override {
  38     ASSERT_NO_ERROR(
  39         fs::createUniqueDirectory("file-system-test", TestDirectory));
  40     // We don't care about this specific file.
  41     errs() << "Test Directory: " << TestDirectory << '\n';
  42     errs().flush();
  43   }
  44
  45   void TearDown() override { ASSERT_NO_ERROR(fs::remove(TestDirectory.str())); }
  46 };
  47
  48 const char archive[] = "!<arch>\x0A";
  49 const char bitcode[] = "\xde\xc0\x17\x0b";
  50 const char coff_object[] = "\x00\x00......";
  51 const char coff_bigobj[] =
  52     "\x00\x00\xff\xff\x00\x02......"
  53     "\xc7\xa1\xba\xd1\xee\xba\xa9\x4b\xaf\x20\xfa\xf6\x6a\xa4\xdc\xb8";
  54 const char coff_import_library[] = "\x00\x00\xff\xff....";
  55 const char elf_relocatable[] = {0x7f, 'E', 'L', 'F', 1, 2, 1, 0, 0,
  56                                 0,    0,   0,   0,   0, 0, 0, 0, 1};
  57 const char macho_universal_binary[] = "\xca\xfe\xba\xbe...\x00";
  58 const char macho_object[] =
  59     "\xfe\xed\xfa\xce........\x00\x00\x00\x01............";
  60 const char macho_executable[] =
  61     "\xfe\xed\xfa\xce........\x00\x00\x00\x02............";
  62 const char macho_fixed_virtual_memory_shared_lib[] =
  63     "\xfe\xed\xfa\xce........\x00\x00\x00\x03............";
  64 const char macho_core[] =
  65     "\xfe\xed\xfa\xce........\x00\x00\x00\x04............";
  66 const char macho_preload_executable[] =
  67     "\xfe\xed\xfa\xce........\x00\x00\x00\x05............";
  68 const char macho_dynamically_linked_shared_lib[] =
  69     "\xfe\xed\xfa\xce........\x00\x00\x00\x06............";
  70 const char macho_dynamic_linker[] =
  71     "\xfe\xed\xfa\xce........\x00\x00\x00\x07............";
  72 const char macho_bundle[] =
  73     "\xfe\xed\xfa\xce........\x00\x00\x00\x08............";
  74 const char macho_dsym_companion[] =
  75     "\xfe\xed\xfa\xce........\x00\x00\x00\x0a............";
  76 const char macho_kext_bundle[] =
  77     "\xfe\xed\xfa\xce........\x00\x00\x00\x0b............";
  78 const char windows_resource[] =
  79     "\x00\x00\x00\x00\x020\x00\x00\x00\xff\xff\x00\x00\xff\xff\x00\x00";
  80 const char macho_dynamically_linked_shared_lib_stub[] =
  81     "\xfe\xed\xfa\xce........\x00\x00\x00\x09............";
  82 const char ms_dos_stub_broken[] = "\x4d\x5a\x20\x20";
  83 const char pdb[] = "Microsoft C/C++ MSF 7.00\r\n\x1a"
  84                    "DS\x00\x00\x00";
  85 const char tapi_file[] = "--- !tapi-tbd-v1\n";
  86 const char tapi_file_tbd_v1[] = "---\narchs: [";
  87
  88 TEST_F(MagicTest, Magic) {
  89   struct type {
  90     const char *filename;
  91     const char *magic_str;
  92     size_t magic_str_len;
  93     file_magic magic;
  94   } types[] = {
  95 #define DEFINE(magic) {#magic, magic, sizeof(magic), file_magic::magic}
  96       DEFINE(archive),
  97       DEFINE(bitcode),
  98       DEFINE(coff_object),
  99       {"coff_bigobj", coff_bigobj, sizeof(coff_bigobj),
 100        file_magic::coff_object},
 101       DEFINE(coff_import_library),
 102       DEFINE(elf_relocatable),
 103       DEFINE(macho_universal_binary),
 104       DEFINE(macho_object),
 105       DEFINE(macho_executable),
 106       DEFINE(macho_fixed_virtual_memory_shared_lib),
 107       DEFINE(macho_core),
 108       DEFINE(macho_preload_executable),
 109       DEFINE(macho_dynamically_linked_shared_lib),
 110       DEFINE(macho_dynamic_linker),
 111       DEFINE(macho_bundle),
 112       DEFINE(macho_dynamically_linked_shared_lib_stub),
 113       DEFINE(macho_dsym_companion),
 114       DEFINE(macho_kext_bundle),
 115       DEFINE(windows_resource),
 116       DEFINE(pdb),
 117       {"ms_dos_stub_broken", ms_dos_stub_broken, sizeof(ms_dos_stub_broken),
 118        file_magic::unknown},
 119       DEFINE(tapi_file),
 120       {"tapi_file_tbd_v1", tapi_file_tbd_v1, sizeof(tapi_file_tbd_v1),
 121        file_magic::tapi_file},
 122 #undef DEFINE
 123   };
 124
 125   // Create some files filled with magic.
 126   for (type *i = types, *e = types + (sizeof(types) / sizeof(type)); i != e;
 127        ++i) {
 128     SmallString<128> file_pathname(TestDirectory);
 129     llvm::sys::path::append(file_pathname, i->filename);
 130     std::error_code EC;
 131     raw_fd_ostream file(file_pathname, EC, sys::fs::OF_None);
 132     ASSERT_FALSE(file.has_error());
 133     StringRef magic(i->magic_str, i->magic_str_len);
 134     file << magic;
 135     file.close();
 136     EXPECT_EQ(i->magic, identify_magic(magic));
 137     ASSERT_NO_ERROR(fs::remove(Twine(file_pathname)));
 138   }
 139 }