clang/unittests/Driver/DistroTest.cpp

   1 //===- unittests/Driver/DistroTest.cpp --- ToolChains 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 // Unit tests for Distro detection.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "clang/Driver/Distro.h"
  14 #include "llvm/Support/VirtualFileSystem.h"
  15 #include "llvm/Support/raw_ostream.h"
  16 #include "llvm/TargetParser/Host.h"
  17 #include "gtest/gtest.h"
  18
  19 using namespace clang;
  20 using namespace clang::driver;
  21
  22 namespace {
  23
  24 // The tests include all release-related files for each distribution
  25 // in the VFS, in order to make sure that earlier tests do not
  26 // accidentally result in incorrect distribution guess.
  27
  28 TEST(DistroTest, DetectUbuntu) {
  29   llvm::vfs::InMemoryFileSystem UbuntuTrustyFileSystem;
  30   // Ubuntu uses Debian Sid version.
  31   UbuntuTrustyFileSystem.addFile("/etc/debian_version", 0,
  32       llvm::MemoryBuffer::getMemBuffer("jessie/sid\n"));
  33   UbuntuTrustyFileSystem.addFile("/etc/lsb-release", 0,
  34       llvm::MemoryBuffer::getMemBuffer("DISTRIB_ID=Ubuntu\n"
  35                                        "DISTRIB_RELEASE=14.04\n"
  36                                        "DISTRIB_CODENAME=trusty\n"
  37                                        "DISTRIB_DESCRIPTION=\"Ubuntu 14.04 LTS\"\n"));
  38   UbuntuTrustyFileSystem.addFile("/etc/os-release", 0,
  39       llvm::MemoryBuffer::getMemBuffer("NAME=\"Ubuntu\"\n"
  40                                        "VERSION=\"14.04, Trusty Tahr\"\n"
  41                                        "ID=ubuntu\n"
  42                                        "ID_LIKE=debian\n"
  43                                        "PRETTY_NAME=\"Ubuntu 14.04 LTS\"\n"
  44                                        "VERSION_ID=\"14.04\"\n"
  45                                        "HOME_URL=\"http://www.ubuntu.com/\"\n"
  46                                        "SUPPORT_URL=\"http://help.ubuntu.com/\"\n"
  47                                        "BUG_REPORT_URL=\"http://bugs.launchpad.net/ubuntu/\"\n"));
  48
  49   Distro UbuntuTrusty{UbuntuTrustyFileSystem, llvm::Triple("unknown-pc-linux")};
  50   ASSERT_EQ(Distro(Distro::UbuntuTrusty), UbuntuTrusty);
  51   ASSERT_TRUE(UbuntuTrusty.IsUbuntu());
  52   ASSERT_FALSE(UbuntuTrusty.IsRedhat());
  53   ASSERT_FALSE(UbuntuTrusty.IsOpenSUSE());
  54   ASSERT_FALSE(UbuntuTrusty.IsDebian());
  55   ASSERT_FALSE(UbuntuTrusty.IsGentoo());
  56
  57   Distro UbuntuTrusty2{UbuntuTrustyFileSystem, llvm::Triple("unknown-pc-windows")};
  58   ASSERT_EQ(Distro(Distro::UnknownDistro), UbuntuTrusty2);
  59
  60   llvm::vfs::InMemoryFileSystem UbuntuYakketyFileSystem;
  61   UbuntuYakketyFileSystem.addFile("/etc/debian_version", 0,
  62       llvm::MemoryBuffer::getMemBuffer("stretch/sid\n"));
  63   UbuntuYakketyFileSystem.addFile("/etc/lsb-release", 0,
  64       llvm::MemoryBuffer::getMemBuffer("DISTRIB_ID=Ubuntu\n"
  65                                        "DISTRIB_RELEASE=16.10\n"
  66                                        "DISTRIB_CODENAME=yakkety\n"
  67                                        "DISTRIB_DESCRIPTION=\"Ubuntu 16.10\"\n"));
  68   UbuntuYakketyFileSystem.addFile("/etc/os-release", 0,
  69       llvm::MemoryBuffer::getMemBuffer("NAME=\"Ubuntu\"\n"
  70                                        "VERSION=\"16.10 (Yakkety Yak)\"\n"
  71                                        "ID=ubuntu\n"
  72                                        "ID_LIKE=debian\n"
  73                                        "PRETTY_NAME=\"Ubuntu 16.10\"\n"
  74                                        "VERSION_ID=\"16.10\"\n"
  75                                        "HOME_URL=\"http://www.ubuntu.com/\"\n"
  76                                        "SUPPORT_URL=\"http://help.ubuntu.com/\"\n"
  77                                        "BUG_REPORT_URL=\"http://bugs.launchpad.net/ubuntu/\"\n"
  78                                        "PRIVACY_POLICY_URL=\"http://www.ubuntu.com/legal/terms-and-policies/privacy-policy\"\n"
  79                                        "VERSION_CODENAME=yakkety\n"
  80                                        "UBUNTU_CODENAME=yakkety\n"));
  81
  82   Distro UbuntuYakkety{UbuntuYakketyFileSystem, llvm::Triple("unknown-pc-linux")};
  83   ASSERT_EQ(Distro(Distro::UbuntuYakkety), UbuntuYakkety);
  84   ASSERT_TRUE(UbuntuYakkety.IsUbuntu());
  85   ASSERT_FALSE(UbuntuYakkety.IsRedhat());
  86   ASSERT_FALSE(UbuntuYakkety.IsOpenSUSE());
  87   ASSERT_FALSE(UbuntuYakkety.IsDebian());
  88   ASSERT_FALSE(UbuntuYakkety.IsGentoo());
  89 }
  90
  91 TEST(DistroTest, DetectRedhat) {
  92   llvm::vfs::InMemoryFileSystem Fedora25FileSystem;
  93   Fedora25FileSystem.addFile("/etc/system-release-cpe", 0,
  94       llvm::MemoryBuffer::getMemBuffer("cpe:/o:fedoraproject:fedora:25\n"));
  95   // Both files are symlinks to fedora-release.
  96   Fedora25FileSystem.addFile("/etc/system-release", 0,
  97       llvm::MemoryBuffer::getMemBuffer("Fedora release 25 (Twenty Five)\n"));
  98   Fedora25FileSystem.addFile("/etc/redhat-release", 0,
  99       llvm::MemoryBuffer::getMemBuffer("Fedora release 25 (Twenty Five)\n"));
 100   Fedora25FileSystem.addFile("/etc/fedora-release", 0,
 101       llvm::MemoryBuffer::getMemBuffer("Fedora release 25 (Twenty Five)\n"));
 102   Fedora25FileSystem.addFile("/etc/os-release", 0,
 103       llvm::MemoryBuffer::getMemBuffer("NAME=Fedora\n"
 104                                        "VERSION=\"25 (Twenty Five)\"\n"
 105                                        "ID=fedora\n"
 106                                        "VERSION_ID=25\n"
 107                                        "PRETTY_NAME=\"Fedora 25 (Twenty Five)\"\n"
 108                                        "ANSI_COLOR=\"0;34\"\n"
 109                                        "CPE_NAME=\"cpe:/o:fedoraproject:fedora:25\"\n"
 110                                        "HOME_URL=\"https://fedoraproject.org/\"\n"
 111                                        "BUG_REPORT_URL=\"https://bugzilla.redhat.com/\"\n"
 112                                        "REDHAT_BUGZILLA_PRODUCT=\"Fedora\"\n"
 113                                        "REDHAT_BUGZILLA_PRODUCT_VERSION=25\n"
 114                                        "REDHAT_SUPPORT_PRODUCT=\"Fedora\"\n"
 115                                        "REDHAT_SUPPORT_PRODUCT_VERSION=25\n"
 116                                        "PRIVACY_POLICY_URL=https://fedoraproject.org/wiki/Legal:PrivacyPolicy\n"));
 117   Distro Fedora25{Fedora25FileSystem, llvm::Triple("unknown-pc-linux")};
 118   ASSERT_EQ(Distro(Distro::Fedora), Fedora25);
 119   ASSERT_FALSE(Fedora25.IsUbuntu());
 120   ASSERT_TRUE(Fedora25.IsRedhat());
 121   ASSERT_FALSE(Fedora25.IsOpenSUSE());
 122   ASSERT_FALSE(Fedora25.IsDebian());
 123   ASSERT_FALSE(Fedora25.IsGentoo());
 124
 125   llvm::vfs::InMemoryFileSystem CentOS7FileSystem;
 126   CentOS7FileSystem.addFile("/etc/system-release-cpe", 0,
 127       llvm::MemoryBuffer::getMemBuffer("cpe:/o:centos:centos:7\n"));
 128   // Both files are symlinks to centos-release.
 129   CentOS7FileSystem.addFile("/etc/system-release", 0,
 130       llvm::MemoryBuffer::getMemBuffer("CentOS Linux release 7.2.1511 (Core) \n"));
 131   CentOS7FileSystem.addFile("/etc/redhat-release", 0,
 132       llvm::MemoryBuffer::getMemBuffer("CentOS Linux release 7.2.1511 (Core) \n"));
 133   CentOS7FileSystem.addFile("/etc/centos-release", 0,
 134       llvm::MemoryBuffer::getMemBuffer("CentOS Linux release 7.2.1511 (Core) \n"));
 135   CentOS7FileSystem.addFile("/etc/centos-release-upstream", 0,
 136       llvm::MemoryBuffer::getMemBuffer("Derived from Red Hat Enterprise Linux 7.2 (Source)\n"));
 137   CentOS7FileSystem.addFile("/etc/os-release", 0,
 138       llvm::MemoryBuffer::getMemBuffer("NAME=\"CentOS Linux\"\n"
 139                                        "VERSION=\"7 (Core)\"\n"
 140                                        "ID=\"centos\"\n"
 141                                        "ID_LIKE=\"rhel fedora\"\n"
 142                                        "VERSION_ID=\"7\"\n"
 143                                        "PRETTY_NAME=\"CentOS Linux 7 (Core)\"\n"
 144                                        "ANSI_COLOR=\"0;31\"\n"
 145                                        "CPE_NAME=\"cpe:/o:centos:centos:7\"\n"
 146                                        "HOME_URL=\"https://www.centos.org/\"\n"
 147                                        "BUG_REPORT_URL=\"https://bugs.centos.org/\"\n"
 148                                        "\n"
 149                                        "CENTOS_MANTISBT_PROJECT=\"CentOS-7\"\n"
 150                                        "CENTOS_MANTISBT_PROJECT_VERSION=\"7\"\n"
 151                                        "REDHAT_SUPPORT_PRODUCT=\"centos\"\n"
 152                                        "REDHAT_SUPPORT_PRODUCT_VERSION=\"7\"\n"));
 153
 154   Distro CentOS7{CentOS7FileSystem, llvm::Triple("unknown-pc-linux")};
 155   ASSERT_EQ(Distro(Distro::RHEL7), CentOS7);
 156   ASSERT_FALSE(CentOS7.IsUbuntu());
 157   ASSERT_TRUE(CentOS7.IsRedhat());
 158   ASSERT_FALSE(CentOS7.IsOpenSUSE());
 159   ASSERT_FALSE(CentOS7.IsDebian());
 160   ASSERT_FALSE(CentOS7.IsGentoo());
 161 }
 162
 163 TEST(DistroTest, DetectOpenSUSE) {
 164   llvm::vfs::InMemoryFileSystem OpenSUSELeap421FileSystem;
 165   OpenSUSELeap421FileSystem.addFile("/etc/SuSE-release", 0,
 166       llvm::MemoryBuffer::getMemBuffer("openSUSE 42.1 (x86_64)\n"
 167                                        "VERSION = 42.1\n"
 168                                        "CODENAME = Malachite\n"
 169                                        "# /etc/SuSE-release is deprecated and will be removed in the future, use /etc/os-release instead\n"));
 170   OpenSUSELeap421FileSystem.addFile("/etc/os-release", 0,
 171       llvm::MemoryBuffer::getMemBuffer("NAME=\"openSUSE Leap\"\n"
 172                                        "VERSION=\"42.1\"\n"
 173                                        "VERSION_ID=\"42.1\"\n"
 174                                        "PRETTY_NAME=\"openSUSE Leap 42.1 (x86_64)\"\n"
 175                                        "ID=opensuse\n"
 176                                        "ANSI_COLOR=\"0;32\"\n"
 177                                        "CPE_NAME=\"cpe:/o:opensuse:opensuse:42.1\"\n"
 178                                        "BUG_REPORT_URL=\"https://bugs.opensuse.org\"\n"
 179                                        "HOME_URL=\"https://opensuse.org/\"\n"
 180                                        "ID_LIKE=\"suse\"\n"));
 181
 182   Distro OpenSUSELeap421{OpenSUSELeap421FileSystem, llvm::Triple("unknown-pc-linux")};
 183   ASSERT_EQ(Distro(Distro::OpenSUSE), OpenSUSELeap421);
 184   ASSERT_FALSE(OpenSUSELeap421.IsUbuntu());
 185   ASSERT_FALSE(OpenSUSELeap421.IsRedhat());
 186   ASSERT_TRUE(OpenSUSELeap421.IsOpenSUSE());
 187   ASSERT_FALSE(OpenSUSELeap421.IsDebian());
 188   ASSERT_FALSE(OpenSUSELeap421.IsGentoo());
 189
 190   llvm::vfs::InMemoryFileSystem OpenSUSE132FileSystem;
 191   OpenSUSE132FileSystem.addFile("/etc/SuSE-release", 0,
 192       llvm::MemoryBuffer::getMemBuffer("openSUSE 13.2 (x86_64)\n"
 193                                        "VERSION = 13.2\n"
 194                                        "CODENAME = Harlequin\n"
 195                                        "# /etc/SuSE-release is deprecated and will be removed in the future, use /etc/os-release instead\n"));
 196   OpenSUSE132FileSystem.addFile("/etc/os-release", 0,
 197       llvm::MemoryBuffer::getMemBuffer("NAME=openSUSE\n"
 198                                        "VERSION=\"13.2 (Harlequin)\"\n"
 199                                        "VERSION_ID=\"13.2\"\n"
 200                                        "PRETTY_NAME=\"openSUSE 13.2 (Harlequin) (x86_64)\"\n"
 201                                        "ID=opensuse\n"
 202                                        "ANSI_COLOR=\"0;32\"\n"
 203                                        "CPE_NAME=\"cpe:/o:opensuse:opensuse:13.2\"\n"
 204                                        "BUG_REPORT_URL=\"https://bugs.opensuse.org\"\n"
 205                                        "HOME_URL=\"https://opensuse.org/\"\n"
 206                                        "ID_LIKE=\"suse\"\n"));
 207
 208   Distro OpenSUSE132{OpenSUSE132FileSystem, llvm::Triple("unknown-pc-linux")};
 209   ASSERT_EQ(Distro(Distro::OpenSUSE), OpenSUSE132);
 210   ASSERT_FALSE(OpenSUSE132.IsUbuntu());
 211   ASSERT_FALSE(OpenSUSE132.IsRedhat());
 212   ASSERT_TRUE(OpenSUSE132.IsOpenSUSE());
 213   ASSERT_FALSE(OpenSUSE132.IsDebian());
 214   ASSERT_FALSE(OpenSUSE132.IsGentoo());
 215
 216   llvm::vfs::InMemoryFileSystem SLES10FileSystem;
 217   SLES10FileSystem.addFile("/etc/SuSE-release", 0,
 218       llvm::MemoryBuffer::getMemBuffer("SUSE Linux Enterprise Server 10 (x86_64)\n"
 219                                        "VERSION = 10\n"
 220                                        "PATCHLEVEL = 4\n"));
 221   SLES10FileSystem.addFile("/etc/lsb_release", 0,
 222       llvm::MemoryBuffer::getMemBuffer("LSB_VERSION=\"core-2.0-noarch:core-3.0-noarch:core-2.0-x86_64:core-3.0-x86_64\"\n"));
 223
 224   // SLES10 is unsupported and therefore evaluates to unknown
 225   Distro SLES10{SLES10FileSystem, llvm::Triple("unknown-pc-linux")};
 226   ASSERT_EQ(Distro(Distro::UnknownDistro), SLES10);
 227   ASSERT_FALSE(SLES10.IsUbuntu());
 228   ASSERT_FALSE(SLES10.IsRedhat());
 229   ASSERT_FALSE(SLES10.IsOpenSUSE());
 230   ASSERT_FALSE(SLES10.IsDebian());
 231   ASSERT_FALSE(SLES10.IsGentoo());
 232 }
 233
 234 TEST(DistroTest, DetectDebian) {
 235   llvm::vfs::InMemoryFileSystem DebianJessieFileSystem;
 236   DebianJessieFileSystem.addFile("/etc/debian_version", 0,
 237                                  llvm::MemoryBuffer::getMemBuffer("8.6\n"));
 238   DebianJessieFileSystem.addFile("/etc/os-release", 0,
 239       llvm::MemoryBuffer::getMemBuffer("PRETTY_NAME=\"Debian GNU/Linux 8 (jessie)\"\n"
 240                                        "NAME=\"Debian GNU/Linux\"\n"
 241                                        "VERSION_ID=\"8\"\n"
 242                                        "VERSION=\"8 (jessie)\"\n"
 243                                        "ID=debian\n"
 244                                        "HOME_URL=\"http://www.debian.org/\"\n"
 245                                        "SUPPORT_URL=\"http://www.debian.org/support\"\n"
 246                                        "BUG_REPORT_URL=\"https://bugs.debian.org/\"\n"));
 247
 248   Distro DebianJessie{DebianJessieFileSystem, llvm::Triple("unknown-pc-linux")};
 249   ASSERT_EQ(Distro(Distro::DebianJessie), DebianJessie);
 250   ASSERT_FALSE(DebianJessie.IsUbuntu());
 251   ASSERT_FALSE(DebianJessie.IsRedhat());
 252   ASSERT_FALSE(DebianJessie.IsOpenSUSE());
 253   ASSERT_TRUE(DebianJessie.IsDebian());
 254   ASSERT_FALSE(DebianJessie.IsGentoo());
 255
 256   llvm::vfs::InMemoryFileSystem DebianStretchSidFileSystem;
 257   DebianStretchSidFileSystem.addFile("/etc/debian_version", 0,
 258                                  llvm::MemoryBuffer::getMemBuffer("stretch/sid\n"));
 259   DebianStretchSidFileSystem.addFile("/etc/os-release", 0,
 260       llvm::MemoryBuffer::getMemBuffer("PRETTY_NAME=\"Debian GNU/Linux stretch/sid\"\n"
 261                                        "NAME=\"Debian GNU/Linux\"\n"
 262                                        "ID=debian\n"
 263                                        "HOME_URL=\"http://www.debian.org/\"\n"
 264                                        "SUPPORT_URL=\"http://www.debian.org/support\"\n"
 265                                        "BUG_REPORT_URL=\"https://bugs.debian.org/\"\n"));
 266
 267   Distro DebianStretchSid{DebianStretchSidFileSystem, llvm::Triple("unknown-pc-linux")};
 268   ASSERT_EQ(Distro(Distro::DebianStretch), DebianStretchSid);
 269   ASSERT_FALSE(DebianStretchSid.IsUbuntu());
 270   ASSERT_FALSE(DebianStretchSid.IsRedhat());
 271   ASSERT_FALSE(DebianStretchSid.IsOpenSUSE());
 272   ASSERT_TRUE(DebianStretchSid.IsDebian());
 273   ASSERT_FALSE(DebianStretchSid.IsGentoo());
 274 }
 275
 276 TEST(DistroTest, DetectExherbo) {
 277   llvm::vfs::InMemoryFileSystem ExherboFileSystem;
 278   ExherboFileSystem.addFile("/etc/os-release", 0,
 279       llvm::MemoryBuffer::getMemBuffer("NAME=\"Exherbo\"\n"
 280                                        "PRETTY_NAME=\"Exherbo Linux\"\n"
 281                                        "ID=exherbo\n"
 282                                        "ANSI_COLOR=\"0;32\"\n"
 283                                        "HOME_URL=\"https://www.exherbo.org/\"\n"
 284                                        "SUPPORT_URL=\"irc://irc.freenode.net/#exherbo\"\n"
 285                                        "BUG_REPORT_URL=\"https://bugs.exherbo.org/\"\n"));
 286
 287   Distro Exherbo{ExherboFileSystem, llvm::Triple("unknown-pc-linux")};
 288   ASSERT_EQ(Distro(Distro::Exherbo), Exherbo);
 289   ASSERT_FALSE(Exherbo.IsUbuntu());
 290   ASSERT_FALSE(Exherbo.IsRedhat());
 291   ASSERT_FALSE(Exherbo.IsOpenSUSE());
 292   ASSERT_FALSE(Exherbo.IsDebian());
 293   ASSERT_FALSE(Exherbo.IsGentoo());
 294 }
 295
 296 TEST(DistroTest, DetectArchLinux) {
 297   llvm::vfs::InMemoryFileSystem ArchLinuxFileSystem;
 298   ArchLinuxFileSystem.addFile("/etc/arch-release", 0, // (empty)
 299                                  llvm::MemoryBuffer::getMemBuffer(""));
 300   ArchLinuxFileSystem.addFile("/etc/os-release", 0,
 301       llvm::MemoryBuffer::getMemBuffer("NAME=\"Arch Linux\"\n"
 302                                        "ID=arch\n"
 303                                        "PRETTY_NAME=\"Arch Linux\"\n"
 304                                        "ANSI_COLOR=\"0;36\"\n"
 305                                        "HOME_URL=\"https://www.archlinux.org/\"\n"
 306                                        "SUPPORT_URL=\"https://bbs.archlinux.org/\"\n"
 307                                        "BUG_REPORT_URL=\"https://bugs.archlinux.org/\"\n"));
 308
 309   Distro ArchLinux{ArchLinuxFileSystem, llvm::Triple("unknown-pc-linux")};
 310   ASSERT_EQ(Distro(Distro::ArchLinux), ArchLinux);
 311   ASSERT_FALSE(ArchLinux.IsUbuntu());
 312   ASSERT_FALSE(ArchLinux.IsRedhat());
 313   ASSERT_FALSE(ArchLinux.IsOpenSUSE());
 314   ASSERT_FALSE(ArchLinux.IsDebian());
 315   ASSERT_FALSE(ArchLinux.IsGentoo());
 316 }
 317
 318 TEST(DistroTest, DetectGentoo) {
 319   llvm::vfs::InMemoryFileSystem GentooFileSystem;
 320   GentooFileSystem.addFile(
 321       "/etc/gentoo-release", 0,
 322       llvm::MemoryBuffer::getMemBuffer("Gentoo Base System release 2.6"));
 323   GentooFileSystem.addFile(
 324       "/etc/os-release", 0,
 325       llvm::MemoryBuffer::getMemBuffer(
 326           "NAME=Gentoo\n"
 327           "ID=gentoo\n"
 328           "PRETTY_NAME=\"Gentoo/Linux\"\n"
 329           "ANSI_COLOR=\"1;32\"\n"
 330           "HOME_URL=\"https://www.gentoo.org/\"\n"
 331           "SUPPORT_URL=\"https://www.gentoo.org/support/\"\n"
 332           "BUG_REPORT_URL=\"https://bugs.gentoo.org/\"\n"));
 333
 334   Distro Gentoo{GentooFileSystem, llvm::Triple("unknown-pc-linux")};
 335   ASSERT_EQ(Distro(Distro::Gentoo), Gentoo);
 336   ASSERT_FALSE(Gentoo.IsUbuntu());
 337   ASSERT_FALSE(Gentoo.IsRedhat());
 338   ASSERT_FALSE(Gentoo.IsOpenSUSE());
 339   ASSERT_FALSE(Gentoo.IsDebian());
 340   ASSERT_TRUE(Gentoo.IsGentoo());
 341 }
 342
 343 TEST(DistroTest, DetectWindowsAndCrossCompile) {
 344
 345   class CountingFileSystem : public llvm::vfs::ProxyFileSystem {
 346   public:
 347     CountingFileSystem() : ProxyFileSystem(llvm::vfs::getRealFileSystem()) {}
 348
 349     llvm::ErrorOr<llvm::vfs::Status> status(const llvm::Twine &Path) override {
 350       ++Count;
 351       return llvm::vfs::ProxyFileSystem::status(Path);
 352     }
 353
 354     llvm::ErrorOr<std::unique_ptr<llvm::vfs::File>>
 355     openFileForRead(const llvm::Twine &Path) override {
 356       ++Count;
 357       return llvm::vfs::ProxyFileSystem::openFileForRead(Path);
 358     }
 359
 360     unsigned Count{};
 361   };
 362
 363   llvm::Triple Host(llvm::sys::getProcessTriple());
 364   if (!Host.isOSWindows())
 365     GTEST_SKIP();
 366
 367   llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> RFS =
 368       llvm::vfs::getRealFileSystem();
 369
 370   CountingFileSystem CFileSystem;
 371   Distro LinuxDistro{CFileSystem, llvm::Triple("unknown-pc-linux")};
 372   ASSERT_EQ(Distro(Distro::UnknownDistro), LinuxDistro);
 373   ASSERT_GT(CFileSystem.Count, 0U);
 374
 375   Distro WinDistro{CFileSystem, llvm::Triple("unknown-pc-windows")};
 376   ASSERT_EQ(Distro(Distro::UnknownDistro), WinDistro);
 377   ASSERT_GT(CFileSystem.Count, 0U);
 378
 379   // When running on Windows along with a real file system, ensure that no
 380   // distro is returned if targeting Linux
 381   Distro LinuxRealDistro{*RFS, llvm::Triple("unknown-pc-linux")};
 382   ASSERT_EQ(Distro(Distro::UnknownDistro), LinuxRealDistro);
 383
 384   Distro WinRealDistro{*RFS, llvm::Triple("unknown-pc-windows")};
 385   ASSERT_EQ(Distro(Distro::UnknownDistro), WinRealDistro);
 386 }
 387
 388 TEST(DistroTest, DetectLinux) {
 389   llvm::Triple Host(llvm::sys::getProcessTriple());
 390   if (!Host.isOSLinux())
 391     GTEST_SKIP();
 392
 393   // When running on Linux, check if the distro is the same as the host when
 394   // targeting Linux
 395   llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> RFS =
 396       llvm::vfs::getRealFileSystem();
 397   Distro HostDistro{*RFS, Host};
 398   Distro LinuxRealDistro{*RFS, llvm::Triple("unknown-pc-linux")};
 399   ASSERT_EQ(HostDistro, LinuxRealDistro);
 400 }
 401
 402 } // end anonymous namespace