external/bsd/llvm/dist/clang/lib/Driver/MSVCToolChain.cpp

   1 //===--- ToolChains.cpp - ToolChain Implementations -----------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "ToolChains.h"
  11 #include "clang/Basic/CharInfo.h"
  12 #include "clang/Basic/Version.h"
  13 #include "clang/Driver/Compilation.h"
  14 #include "clang/Driver/Driver.h"
  15 #include "clang/Driver/DriverDiagnostic.h"
  16 #include "clang/Driver/Options.h"
  17 #include "llvm/ADT/StringExtras.h"
  18 #include "llvm/Config/llvm-config.h"
  19 #include "llvm/Option/Arg.h"
  20 #include "llvm/Option/ArgList.h"
  21 #include "llvm/Support/ErrorHandling.h"
  22 #include "llvm/Support/FileSystem.h"
  23 #include "llvm/Support/Process.h"
  24
  25 // Include the necessary headers to interface with the Windows registry and
  26 // environment.
  27 #if defined(LLVM_ON_WIN32)
  28 #define USE_WIN32
  29 #endif
  30
  31 #ifdef USE_WIN32
  32   #define WIN32_LEAN_AND_MEAN
  33   #define NOGDI
  34   #ifndef NOMINMAX
  35     #define NOMINMAX
  36   #endif
  37   #include <windows.h>
  38 #endif
  39
  40 using namespace clang::driver;
  41 using namespace clang::driver::toolchains;
  42 using namespace clang;
  43 using namespace llvm::opt;
  44
  45 MSVCToolChain::MSVCToolChain(const Driver &D, const llvm::Triple& Triple,
  46                              const ArgList &Args)
  47   : ToolChain(D, Triple, Args) {
  48   getProgramPaths().push_back(getDriver().getInstalledDir());
  49   if (getDriver().getInstalledDir() != getDriver().Dir)
  50     getProgramPaths().push_back(getDriver().Dir);
  51 }
  52
  53 Tool *MSVCToolChain::buildLinker() const {
  54   return new tools::visualstudio::Link(*this);
  55 }
  56
  57 Tool *MSVCToolChain::buildAssembler() const {
  58   if (getTriple().isOSBinFormatMachO())
  59     return new tools::darwin::Assemble(*this);
  60   getDriver().Diag(clang::diag::err_no_external_assembler);
  61   return nullptr;
  62 }
  63
  64 bool MSVCToolChain::IsIntegratedAssemblerDefault() const {
  65   return true;
  66 }
  67
  68 bool MSVCToolChain::IsUnwindTablesDefault() const {
  69   // Emit unwind tables by default on Win64. All non-x86_32 Windows platforms
  70   // such as ARM and PPC actually require unwind tables, but LLVM doesn't know
  71   // how to generate them yet.
  72   return getArch() == llvm::Triple::x86_64;
  73 }
  74
  75 bool MSVCToolChain::isPICDefault() const {
  76   return getArch() == llvm::Triple::x86_64;
  77 }
  78
  79 bool MSVCToolChain::isPIEDefault() const {
  80   return false;
  81 }
  82
  83 bool MSVCToolChain::isPICDefaultForced() const {
  84   return getArch() == llvm::Triple::x86_64;
  85 }
  86
  87 #ifdef USE_WIN32
  88 static bool readFullStringValue(HKEY hkey, const char *valueName,
  89                                 std::string &value) {
  90   // FIXME: We should be using the W versions of the registry functions, but
  91   // doing so requires UTF8 / UTF16 conversions similar to how we handle command
  92   // line arguments.  The UTF8 conversion functions are not exposed publicly
  93   // from LLVM though, so in order to do this we will probably need to create
  94   // a registry abstraction in LLVMSupport that is Windows only.
  95   DWORD result = 0;
  96   DWORD valueSize = 0;
  97   DWORD type = 0;
  98   // First just query for the required size.
  99   result = RegQueryValueEx(hkey, valueName, NULL, &type, NULL, &valueSize);
 100   if (result != ERROR_SUCCESS || type != REG_SZ)
 101     return false;
 102   std::vector<BYTE> buffer(valueSize);
 103   result = RegQueryValueEx(hkey, valueName, NULL, NULL, &buffer[0], &valueSize);
 104   if (result == ERROR_SUCCESS)
 105     value.assign(reinterpret_cast<const char *>(buffer.data()));
 106   return result;
 107 }
 108 #endif
 109
 110 /// \brief Read registry string.
 111 /// This also supports a means to look for high-versioned keys by use
 112 /// of a $VERSION placeholder in the key path.
 113 /// $VERSION in the key path is a placeholder for the version number,
 114 /// causing the highest value path to be searched for and used.
 115 /// I.e. "SOFTWARE\\Microsoft\\VisualStudio\\$VERSION".
 116 /// There can be additional characters in the component.  Only the numeric
 117 /// characters are compared.  This function only searches HKLM.
 118 static bool getSystemRegistryString(const char *keyPath, const char *valueName,
 119                                     std::string &value, std::string *phValue) {
 120 #ifndef USE_WIN32
 121   return false;
 122 #else
 123   HKEY hRootKey = HKEY_LOCAL_MACHINE;
 124   HKEY hKey = NULL;
 125   long lResult;
 126   bool returnValue = false;
 127
 128   const char *placeHolder = strstr(keyPath, "$VERSION");
 129   std::string bestName;
 130   // If we have a $VERSION placeholder, do the highest-version search.
 131   if (placeHolder) {
 132     const char *keyEnd = placeHolder - 1;
 133     const char *nextKey = placeHolder;
 134     // Find end of previous key.
 135     while ((keyEnd > keyPath) && (*keyEnd != '\\'))
 136       keyEnd--;
 137     // Find end of key containing $VERSION.
 138     while (*nextKey && (*nextKey != '\\'))
 139       nextKey++;
 140     size_t partialKeyLength = keyEnd - keyPath;
 141     char partialKey[256];
 142     if (partialKeyLength > sizeof(partialKey))
 143       partialKeyLength = sizeof(partialKey);
 144     strncpy(partialKey, keyPath, partialKeyLength);
 145     partialKey[partialKeyLength] = '\0';
 146     HKEY hTopKey = NULL;
 147     lResult = RegOpenKeyEx(hRootKey, partialKey, 0, KEY_READ | KEY_WOW64_32KEY,
 148                            &hTopKey);
 149     if (lResult == ERROR_SUCCESS) {
 150       char keyName[256];
 151       double bestValue = 0.0;
 152       DWORD index, size = sizeof(keyName) - 1;
 153       for (index = 0; RegEnumKeyEx(hTopKey, index, keyName, &size, NULL,
 154           NULL, NULL, NULL) == ERROR_SUCCESS; index++) {
 155         const char *sp = keyName;
 156         while (*sp && !isDigit(*sp))
 157           sp++;
 158         if (!*sp)
 159           continue;
 160         const char *ep = sp + 1;
 161         while (*ep && (isDigit(*ep) || (*ep == '.')))
 162           ep++;
 163         char numBuf[32];
 164         strncpy(numBuf, sp, sizeof(numBuf) - 1);
 165         numBuf[sizeof(numBuf) - 1] = '\0';
 166         double dvalue = strtod(numBuf, NULL);
 167         if (dvalue > bestValue) {
 168           // Test that InstallDir is indeed there before keeping this index.
 169           // Open the chosen key path remainder.
 170           bestName = keyName;
 171           // Append rest of key.
 172           bestName.append(nextKey);
 173           lResult = RegOpenKeyEx(hTopKey, bestName.c_str(), 0,
 174                                  KEY_READ | KEY_WOW64_32KEY, &hKey);
 175           if (lResult == ERROR_SUCCESS) {
 176             lResult = readFullStringValue(hKey, valueName, value);
 177             if (lResult == ERROR_SUCCESS) {
 178               bestValue = dvalue;
 179               if (phValue)
 180                 *phValue = bestName;
 181               returnValue = true;
 182             }
 183             RegCloseKey(hKey);
 184           }
 185         }
 186         size = sizeof(keyName) - 1;
 187       }
 188       RegCloseKey(hTopKey);
 189     }
 190   } else {
 191     lResult =
 192         RegOpenKeyEx(hRootKey, keyPath, 0, KEY_READ | KEY_WOW64_32KEY, &hKey);
 193     if (lResult == ERROR_SUCCESS) {
 194       lResult = readFullStringValue(hKey, valueName, value);
 195       if (lResult == ERROR_SUCCESS)
 196         returnValue = true;
 197       if (phValue)
 198         phValue->clear();
 199       RegCloseKey(hKey);
 200     }
 201   }
 202   return returnValue;
 203 #endif // USE_WIN32
 204 }
 205
 206 /// \brief Get Windows SDK installation directory.
 207 bool MSVCToolChain::getWindowsSDKDir(std::string &path, int &major,
 208                                      int &minor) const {
 209   std::string sdkVersion;
 210   // Try the Windows registry.
 211   bool hasSDKDir = getSystemRegistryString(
 212       "SOFTWARE\\Microsoft\\Microsoft SDKs\\Windows\\$VERSION",
 213       "InstallationFolder", path, &sdkVersion);
 214   if (!sdkVersion.empty())
 215     ::sscanf(sdkVersion.c_str(), "v%d.%d", &major, &minor);
 216   return hasSDKDir && !path.empty();
 217 }
 218
 219 // Gets the library path required to link against the Windows SDK.
 220 bool MSVCToolChain::getWindowsSDKLibraryPath(std::string &path) const {
 221   std::string sdkPath;
 222   int sdkMajor = 0;
 223   int sdkMinor = 0;
 224
 225   path.clear();
 226   if (!getWindowsSDKDir(sdkPath, sdkMajor, sdkMinor))
 227     return false;
 228
 229   llvm::SmallString<128> libPath(sdkPath);
 230   llvm::sys::path::append(libPath, "Lib");
 231   if (sdkMajor <= 7) {
 232     switch (getArch()) {
 233     // In Windows SDK 7.x, x86 libraries are directly in the Lib folder.
 234     case llvm::Triple::x86:
 235       break;
 236     case llvm::Triple::x86_64:
 237       llvm::sys::path::append(libPath, "x64");
 238       break;
 239     case llvm::Triple::arm:
 240       // It is not necessary to link against Windows SDK 7.x when targeting ARM.
 241       return false;
 242     default:
 243       return false;
 244     }
 245   } else {
 246     // Windows SDK 8.x installs libraries in a folder whose names depend on the
 247     // version of the OS you're targeting.  By default choose the newest, which
 248     // usually corresponds to the version of the OS you've installed the SDK on.
 249     const char *tests[] = {"winv6.3", "win8", "win7"};
 250     bool found = false;
 251     for (const char *test : tests) {
 252       llvm::SmallString<128> testPath(libPath);
 253       llvm::sys::path::append(testPath, test);
 254       if (llvm::sys::fs::exists(testPath.c_str())) {
 255         libPath = testPath;
 256         found = true;
 257         break;
 258       }
 259     }
 260
 261     if (!found)
 262       return false;
 263
 264     llvm::sys::path::append(libPath, "um");
 265     switch (getArch()) {
 266     case llvm::Triple::x86:
 267       llvm::sys::path::append(libPath, "x86");
 268       break;
 269     case llvm::Triple::x86_64:
 270       llvm::sys::path::append(libPath, "x64");
 271       break;
 272     case llvm::Triple::arm:
 273       llvm::sys::path::append(libPath, "arm");
 274       break;
 275     default:
 276       return false;
 277     }
 278   }
 279
 280   path = libPath.str();
 281   return true;
 282 }
 283
 284 // Get the location to use for Visual Studio binaries.  The location priority
 285 // is: %VCINSTALLDIR% > %PATH% > newest copy of Visual Studio installed on
 286 // system (as reported by the registry).
 287 bool MSVCToolChain::getVisualStudioBinariesFolder(const char *clangProgramPath,
 288                                                   std::string &path) const {
 289   path.clear();
 290
 291   SmallString<128> BinDir;
 292
 293   // First check the environment variables that vsvars32.bat sets.
 294   llvm::Optional<std::string> VcInstallDir =
 295       llvm::sys::Process::GetEnv("VCINSTALLDIR");
 296   if (VcInstallDir.hasValue()) {
 297     BinDir = VcInstallDir.getValue();
 298     llvm::sys::path::append(BinDir, "bin");
 299   } else {
 300     // Next walk the PATH, trying to find a cl.exe in the path.  If we find one,
 301     // use that.  However, make sure it's not clang's cl.exe.
 302     llvm::Optional<std::string> OptPath = llvm::sys::Process::GetEnv("PATH");
 303     if (OptPath.hasValue()) {
 304       const char EnvPathSeparatorStr[] = {llvm::sys::EnvPathSeparator, '\0'};
 305       SmallVector<StringRef, 8> PathSegments;
 306       llvm::SplitString(OptPath.getValue(), PathSegments, EnvPathSeparatorStr);
 307
 308       for (StringRef PathSegment : PathSegments) {
 309         if (PathSegment.empty())
 310           continue;
 311
 312         SmallString<128> FilePath(PathSegment);
 313         llvm::sys::path::append(FilePath, "cl.exe");
 314         if (llvm::sys::fs::can_execute(FilePath.c_str()) &&
 315             !llvm::sys::fs::equivalent(FilePath.c_str(), clangProgramPath)) {
 316           // If we found it on the PATH, use it exactly as is with no
 317           // modifications.
 318           path = PathSegment;
 319           return true;
 320         }
 321       }
 322     }
 323
 324     std::string installDir;
 325     // With no VCINSTALLDIR and nothing on the PATH, if we can't find it in the
 326     // registry then we have no choice but to fail.
 327     if (!getVisualStudioInstallDir(installDir))
 328       return false;
 329
 330     // Regardless of what binary we're ultimately trying to find, we make sure
 331     // that this is a Visual Studio directory by checking for cl.exe.  We use
 332     // cl.exe instead of other binaries like link.exe because programs such as
 333     // GnuWin32 also have a utility called link.exe, so cl.exe is the least
 334     // ambiguous.
 335     BinDir = installDir;
 336     llvm::sys::path::append(BinDir, "VC", "bin");
 337     SmallString<128> ClPath(BinDir);
 338     llvm::sys::path::append(ClPath, "cl.exe");
 339
 340     if (!llvm::sys::fs::can_execute(ClPath.c_str()))
 341       return false;
 342   }
 343
 344   if (BinDir.empty())
 345     return false;
 346
 347   switch (getArch()) {
 348   case llvm::Triple::x86:
 349     break;
 350   case llvm::Triple::x86_64:
 351     llvm::sys::path::append(BinDir, "amd64");
 352     break;
 353   case llvm::Triple::arm:
 354     llvm::sys::path::append(BinDir, "arm");
 355     break;
 356   default:
 357     // Whatever this is, Visual Studio doesn't have a toolchain for it.
 358     return false;
 359   }
 360   path = BinDir.str();
 361   return true;
 362 }
 363
 364 // Get Visual Studio installation directory.
 365 bool MSVCToolChain::getVisualStudioInstallDir(std::string &path) const {
 366   // First check the environment variables that vsvars32.bat sets.
 367   const char *vcinstalldir = getenv("VCINSTALLDIR");
 368   if (vcinstalldir) {
 369     path = vcinstalldir;
 370     path = path.substr(0, path.find("\\VC"));
 371     return true;
 372   }
 373
 374   std::string vsIDEInstallDir;
 375   std::string vsExpressIDEInstallDir;
 376   // Then try the windows registry.
 377   bool hasVCDir =
 378       getSystemRegistryString("SOFTWARE\\Microsoft\\VisualStudio\\$VERSION",
 379                               "InstallDir", vsIDEInstallDir, nullptr);
 380   if (hasVCDir && !vsIDEInstallDir.empty()) {
 381     path = vsIDEInstallDir.substr(0, vsIDEInstallDir.find("\\Common7\\IDE"));
 382     return true;
 383   }
 384
 385   bool hasVCExpressDir =
 386       getSystemRegistryString("SOFTWARE\\Microsoft\\VCExpress\\$VERSION",
 387                               "InstallDir", vsExpressIDEInstallDir, nullptr);
 388   if (hasVCExpressDir && !vsExpressIDEInstallDir.empty()) {
 389     path = vsExpressIDEInstallDir.substr(
 390         0, vsIDEInstallDir.find("\\Common7\\IDE"));
 391     return true;
 392   }
 393
 394   // Try the environment.
 395   const char *vs120comntools = getenv("VS120COMNTOOLS");
 396   const char *vs100comntools = getenv("VS100COMNTOOLS");
 397   const char *vs90comntools = getenv("VS90COMNTOOLS");
 398   const char *vs80comntools = getenv("VS80COMNTOOLS");
 399
 400   const char *vscomntools = nullptr;
 401
 402   // Find any version we can
 403   if (vs120comntools)
 404     vscomntools = vs120comntools;
 405   else if (vs100comntools)
 406     vscomntools = vs100comntools;
 407   else if (vs90comntools)
 408     vscomntools = vs90comntools;
 409   else if (vs80comntools)
 410     vscomntools = vs80comntools;
 411
 412   if (vscomntools && *vscomntools) {
 413     const char *p = strstr(vscomntools, "\\Common7\\Tools");
 414     path = p ? std::string(vscomntools, p) : vscomntools;
 415     return true;
 416   }
 417   return false;
 418 }
 419
 420 void MSVCToolChain::AddSystemIncludeWithSubfolder(const ArgList &DriverArgs,
 421                                                   ArgStringList &CC1Args,
 422                                                   const std::string &folder,
 423                                                   const char *subfolder) const {
 424   llvm::SmallString<128> path(folder);
 425   llvm::sys::path::append(path, subfolder);
 426   addSystemInclude(DriverArgs, CC1Args, path.str());
 427 }
 428
 429 void MSVCToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
 430                                               ArgStringList &CC1Args) const {
 431   if (DriverArgs.hasArg(options::OPT_nostdinc))
 432     return;
 433
 434   if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
 435     SmallString<128> P(getDriver().ResourceDir);
 436     llvm::sys::path::append(P, "include");
 437     addSystemInclude(DriverArgs, CC1Args, P.str());
 438   }
 439
 440   if (DriverArgs.hasArg(options::OPT_nostdlibinc))
 441     return;
 442
 443   // Honor %INCLUDE%. It should know essential search paths with vcvarsall.bat.
 444   if (const char *cl_include_dir = getenv("INCLUDE")) {
 445     SmallVector<StringRef, 8> Dirs;
 446     StringRef(cl_include_dir)
 447         .split(Dirs, ";", /*MaxSplit=*/-1, /*KeepEmpty=*/false);
 448     for (StringRef Dir : Dirs)
 449       addSystemInclude(DriverArgs, CC1Args, Dir);
 450     if (!Dirs.empty())
 451       return;
 452   }
 453
 454   std::string VSDir;
 455
 456   // When built with access to the proper Windows APIs, try to actually find
 457   // the correct include paths first.
 458   if (getVisualStudioInstallDir(VSDir)) {
 459     AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, VSDir, "VC\\include");
 460
 461     std::string WindowsSDKDir;
 462     int major, minor;
 463     if (getWindowsSDKDir(WindowsSDKDir, major, minor)) {
 464       if (major >= 8) {
 465         AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, WindowsSDKDir,
 466                                       "include\\shared");
 467         AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, WindowsSDKDir,
 468                                       "include\\um");
 469         AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, WindowsSDKDir,
 470                                       "include\\winrt");
 471       } else {
 472         AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, WindowsSDKDir,
 473                                       "include");
 474       }
 475     } else {
 476       addSystemInclude(DriverArgs, CC1Args, VSDir);
 477     }
 478     return;
 479   }
 480
 481   // As a fallback, select default install paths.
 482   // FIXME: Don't guess drives and paths like this on Windows.
 483   const StringRef Paths[] = {
 484     "C:/Program Files/Microsoft Visual Studio 10.0/VC/include",
 485     "C:/Program Files/Microsoft Visual Studio 9.0/VC/include",
 486     "C:/Program Files/Microsoft Visual Studio 9.0/VC/PlatformSDK/Include",
 487     "C:/Program Files/Microsoft Visual Studio 8/VC/include",
 488     "C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/Include"
 489   };
 490   addSystemIncludes(DriverArgs, CC1Args, Paths);
 491 }
 492
 493 void MSVCToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
 494                                                  ArgStringList &CC1Args) const {
 495   // FIXME: There should probably be logic here to find libc++ on Windows.
 496 }