LCOV - code coverage report
Current view: top level - lib/Support - Path.cpp (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 467 528 88.4 %
Date: 2018-09-23 13:06:45 Functions: 80 87 92.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : //===-- Path.cpp - Implement OS Path Concept ------------------------------===//
       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             : //  This file implements the operating system Path API.
      11             : //
      12             : //===----------------------------------------------------------------------===//
      13             : 
      14             : #include "llvm/Support/Path.h"
      15             : #include "llvm/ADT/ArrayRef.h"
      16             : #include "llvm/Config/llvm-config.h"
      17             : #include "llvm/Support/Endian.h"
      18             : #include "llvm/Support/Errc.h"
      19             : #include "llvm/Support/ErrorHandling.h"
      20             : #include "llvm/Support/FileSystem.h"
      21             : #include "llvm/Support/Process.h"
      22             : #include "llvm/Support/Signals.h"
      23             : #include <cctype>
      24             : #include <cstring>
      25             : 
      26             : #if !defined(_MSC_VER) && !defined(__MINGW32__)
      27             : #include <unistd.h>
      28             : #else
      29             : #include <io.h>
      30             : #endif
      31             : 
      32             : using namespace llvm;
      33             : using namespace llvm::support::endian;
      34             : 
      35             : namespace {
      36             :   using llvm::StringRef;
      37             :   using llvm::sys::path::is_separator;
      38             :   using llvm::sys::path::Style;
      39             : 
      40             :   inline Style real_style(Style style) {
      41             : #ifdef _WIN32
      42             :     return (style == Style::posix) ? Style::posix : Style::windows;
      43             : #else
      44   282082694 :     return (style == Style::windows) ? Style::windows : Style::posix;
      45             : #endif
      46             :   }
      47             : 
      48             :   inline const char *separators(Style style) {
      49             :     if (real_style(style) == Style::windows)
      50             :       return "\\/";
      51             :     return "/";
      52             :   }
      53             : 
      54             :   inline char preferred_separator(Style style) {
      55             :     if (real_style(style) == Style::windows)
      56             :       return '\\';
      57             :     return '/';
      58             :   }
      59             : 
      60    40696561 :   StringRef find_first_component(StringRef path, Style style) {
      61             :     // Look for this first component in the following order.
      62             :     // * empty (in this case we return an empty string)
      63             :     // * either C: or {//,\\}net.
      64             :     // * {/,\}
      65             :     // * {file,directory}name
      66             : 
      67    40696561 :     if (path.empty())
      68      561983 :       return path;
      69             : 
      70             :     if (real_style(style) == Style::windows) {
      71             :       // C:
      72        7323 :       if (path.size() >= 2 &&
      73        7440 :           std::isalpha(static_cast<unsigned char>(path[0])) && path[1] == ':')
      74          61 :         return path.substr(0, 2);
      75             :     }
      76             : 
      77             :     // //net
      78    78941766 :     if ((path.size() > 2) && is_separator(path[0], style) &&
      79    56124750 :         path[0] == path[1] && !is_separator(path[2], style)) {
      80             :       // Find the next directory separator.
      81         826 :       size_t end = path.find_first_of(separators(style), 2);
      82         826 :       return path.substr(0, end);
      83             :     }
      84             : 
      85             :     // {/,\}
      86    80268120 :     if (is_separator(path[0], style))
      87    16008032 :       return path.substr(0, 1);
      88             : 
      89             :     // * {file,directory}name
      90    24131149 :     size_t end = path.find_first_of(separators(style));
      91    24131606 :     return path.substr(0, end);
      92             :   }
      93             : 
      94             :   // Returns the first character of the filename in str. For paths ending in
      95             :   // '/', it returns the position of the '/'.
      96    12434849 :   size_t filename_pos(StringRef str, Style style) {
      97    12434849 :     if (str.size() > 0 && is_separator(str[str.size() - 1], style))
      98      104837 :       return str.size() - 1;
      99             : 
     100    12330410 :     size_t pos = str.find_last_of(separators(style), str.size() - 1);
     101             : 
     102             :     if (real_style(style) == Style::windows) {
     103         402 :       if (pos == StringRef::npos)
     104          97 :         pos = str.find_last_of(':', str.size() - 2);
     105             :     }
     106             : 
     107    12330009 :     if (pos == StringRef::npos || (pos == 1 && is_separator(str[0], style)))
     108      892790 :       return 0;
     109             : 
     110    11437219 :     return pos + 1;
     111             :   }
     112             : 
     113             :   // Returns the position of the root directory in str. If there is no root
     114             :   // directory in str, it returns StringRef::npos.
     115    12469354 :   size_t root_dir_start(StringRef str, Style style) {
     116             :     // case "c:/"
     117             :     if (real_style(style) == Style::windows) {
     118         431 :       if (str.size() > 2 && str[1] == ':' && is_separator(str[2], style))
     119             :         return 2;
     120             :     }
     121             : 
     122             :     // case "//net"
     123    12469434 :     if (str.size() > 3 && is_separator(str[0], style) && str[0] == str[1] &&
     124         314 :         !is_separator(str[2], style)) {
     125         282 :       return str.find_first_of(separators(style), 2);
     126             :     }
     127             : 
     128             :     // case "/"
     129    12468836 :     if (str.size() > 0 && is_separator(str[0], style))
     130    11570905 :       return 0;
     131             : 
     132             :     return StringRef::npos;
     133             :   }
     134             : 
     135             :   // Returns the position past the end of the "parent path" of path. The parent
     136             :   // path will not end in '/', unless the parent is the root directory. If the
     137             :   // path has no parent, 0 is returned.
     138     4707483 :   size_t parent_path_end(StringRef path, Style style) {
     139     4707483 :     size_t end_pos = filename_pos(path, style);
     140             : 
     141             :     bool filename_was_sep =
     142     4707483 :         path.size() > 0 && is_separator(path[end_pos], style);
     143             : 
     144             :     // Skip separators until we reach root dir (or the start of the string).
     145     4707483 :     size_t root_dir_pos = root_dir_start(path, style);
     146     9147116 :     while (end_pos > 0 &&
     147    13854512 :            (root_dir_pos == StringRef::npos || end_pos > root_dir_pos) &&
     148    18294058 :            is_separator(path[end_pos - 1], style))
     149             :       --end_pos;
     150             : 
     151     4707483 :     if (end_pos == root_dir_pos && !filename_was_sep) {
     152             :       // We've reached the root dir and the input path was *not* ending in a
     153             :       // sequence of slashes. Include the root dir in the parent path.
     154       20142 :       return root_dir_pos + 1;
     155             :     }
     156             : 
     157             :     // Otherwise, just include before the last slash.
     158             :     return end_pos;
     159             :   }
     160             : } // end unnamed namespace
     161             : 
     162             : enum FSEntity {
     163             :   FS_Dir,
     164             :   FS_File,
     165             :   FS_Name
     166             : };
     167             : 
     168             : static std::error_code
     169       26484 : createUniqueEntity(const Twine &Model, int &ResultFD,
     170             :                    SmallVectorImpl<char> &ResultPath, bool MakeAbsolute,
     171             :                    unsigned Mode, FSEntity Type,
     172             :                    sys::fs::OpenFlags Flags = sys::fs::OF_None) {
     173             :   SmallString<128> ModelStorage;
     174       26484 :   Model.toVector(ModelStorage);
     175             : 
     176       26484 :   if (MakeAbsolute) {
     177             :     // Make model absolute by prepending a temp directory if it's not already.
     178        5927 :     if (!sys::path::is_absolute(Twine(ModelStorage))) {
     179             :       SmallString<128> TDir;
     180        5927 :       sys::path::system_temp_directory(true, TDir);
     181        5926 :       sys::path::append(TDir, Twine(ModelStorage));
     182        5927 :       ModelStorage.swap(TDir);
     183             :     }
     184             :   }
     185             : 
     186             :   // From here on, DO NOT modify model. It may be needed if the randomly chosen
     187             :   // path already exists.
     188       26484 :   ResultPath = ModelStorage;
     189             :   // Null terminate.
     190       26483 :   ResultPath.push_back(0);
     191             :   ResultPath.pop_back();
     192             : 
     193             :   // Limit the number of attempts we make, so that we don't infinite loop. E.g.
     194             :   // "permission denied" could be for a specific file (so we retry with a
     195             :   // different name) or for the whole directory (retry would always fail).
     196             :   // Checking which is racy, so we try a number of times, then give up.
     197             :   std::error_code EC;
     198       26670 :   for (int Retries = 128; Retries > 0; --Retries) {
     199             :     // Replace '%' with random chars.
     200     2922935 :     for (unsigned i = 0, e = ModelStorage.size(); i != e; ++i) {
     201     5792532 :       if (ModelStorage[i] == '%')
     202      193305 :         ResultPath[i] =
     203      193305 :             "0123456789abcdef"[sys::Process::GetRandomNumber() & 15];
     204             :     }
     205             : 
     206             :     // Try to open + create the file.
     207       26669 :     switch (Type) {
     208       26612 :     case FS_File: {
     209       26612 :       EC = sys::fs::openFileForReadWrite(Twine(ResultPath.begin()), ResultFD,
     210       26612 :                                          sys::fs::CD_CreateNew, Flags, Mode);
     211       26612 :       if (EC) {
     212             :         // errc::permission_denied happens on Windows when we try to open a file
     213             :         // that has been marked for deletion.
     214             :         if (EC == errc::file_exists || EC == errc::permission_denied)
     215         186 :           continue;
     216          76 :         return EC;
     217             :       }
     218             : 
     219       26350 :       return std::error_code();
     220             :     }
     221             : 
     222           1 :     case FS_Name: {
     223           1 :       EC = sys::fs::access(ResultPath.begin(), sys::fs::AccessMode::Exist);
     224             :       if (EC == errc::no_such_file_or_directory)
     225           1 :         return std::error_code();
     226           0 :       if (EC)
     227           0 :         return EC;
     228             :       continue;
     229             :     }
     230             : 
     231             :     case FS_Dir: {
     232          56 :       EC = sys::fs::create_directory(ResultPath.begin(), false);
     233          56 :       if (EC) {
     234             :         if (EC == errc::file_exists)
     235             :           continue;
     236           0 :         return EC;
     237             :       }
     238          56 :       return std::error_code();
     239             :     }
     240             :     }
     241           0 :     llvm_unreachable("Invalid Type");
     242             :   }
     243           1 :   return EC;
     244             : }
     245             : 
     246             : namespace llvm {
     247             : namespace sys  {
     248             : namespace path {
     249             : 
     250    40694837 : const_iterator begin(StringRef path, Style style) {
     251             :   const_iterator i;
     252    40694837 :   i.Path      = path;
     253    40694837 :   i.Component = find_first_component(path, style);
     254    40695511 :   i.Position  = 0;
     255    40695511 :   i.S = style;
     256    40695511 :   return i;
     257             : }
     258             : 
     259    40698009 : const_iterator end(StringRef path) {
     260             :   const_iterator i;
     261    40698009 :   i.Path      = path;
     262    40698009 :   i.Position  = path.size();
     263    40698009 :   return i;
     264             : }
     265             : 
     266    33419279 : const_iterator &const_iterator::operator++() {
     267             :   assert(Position < Path.size() && "Tried to increment past end!");
     268             : 
     269             :   // Increment Position to past the current component
     270    33419279 :   Position += Component.size();
     271             : 
     272             :   // Check for end.
     273    33419279 :   if (Position == Path.size()) {
     274     9577056 :     Component = StringRef();
     275     9577056 :     return *this;
     276             :   }
     277             : 
     278             :   // Both POSIX and Windows treat paths that begin with exactly two separators
     279             :   // specially.
     280    36651146 :   bool was_net = Component.size() > 2 && is_separator(Component[0], S) &&
     281    23843033 :                  Component[1] == Component[0] && !is_separator(Component[2], S);
     282             : 
     283             :   // Handle separators.
     284    47684146 :   if (is_separator(Path[Position], S)) {
     285             :     // Root dir.
     286    20236273 :     if (was_net ||
     287             :         // c:/
     288    20235463 :         (real_style(S) == Style::windows && Component.endswith(":"))) {
     289         855 :       Component = Path.substr(Position, 1);
     290         855 :       return *this;
     291             :     }
     292             : 
     293             :     // Skip extra separators.
     294    80942044 :     while (Position != Path.size() && is_separator(Path[Position], S)) {
     295    20235604 :       ++Position;
     296             :     }
     297             : 
     298             :     // Treat trailing '/' as a '.', unless it is the root dir.
     299    40470102 :     if (Position == Path.size() && Component != "/") {
     300         932 :       --Position;
     301         932 :       Component = ".";
     302         932 :       return *this;
     303             :     }
     304             :   }
     305             : 
     306             :   // Find next component.
     307    23840180 :   size_t end_pos = Path.find_first_of(separators(S), Position);
     308    23842210 :   Component = Path.slice(Position, end_pos);
     309             : 
     310    23840243 :   return *this;
     311             : }
     312             : 
     313    73501459 : bool const_iterator::operator==(const const_iterator &RHS) const {
     314    73501459 :   return Path.begin() == RHS.Path.begin() && Position == RHS.Position;
     315             : }
     316             : 
     317         287 : ptrdiff_t const_iterator::operator-(const const_iterator &RHS) const {
     318         287 :   return Position - RHS.Position;
     319             : }
     320             : 
     321     4179009 : reverse_iterator rbegin(StringRef Path, Style style) {
     322             :   reverse_iterator I;
     323     4179009 :   I.Path = Path;
     324     4179009 :   I.Position = Path.size();
     325     4179009 :   I.S = style;
     326     4179009 :   return ++I;
     327             : }
     328             : 
     329     2346124 : reverse_iterator rend(StringRef Path) {
     330             :   reverse_iterator I;
     331     2346124 :   I.Path = Path;
     332     2346124 :   I.Component = Path.substr(0, 0);
     333     2346124 :   I.Position = 0;
     334     2346124 :   return I;
     335             : }
     336             : 
     337     7761873 : reverse_iterator &reverse_iterator::operator++() {
     338     7761873 :   size_t root_dir_pos = root_dir_start(Path, S);
     339             : 
     340             :   // Skip separators unless it's the root directory.
     341     7761856 :   size_t end_pos = Position;
     342    18459515 :   while (end_pos > 0 && (end_pos - 1) != root_dir_pos &&
     343    21395300 :          is_separator(Path[end_pos - 1], S))
     344             :     --end_pos;
     345             : 
     346             :   // Treat trailing '/' as a '.', unless it is the root dir.
     347    11287216 :   if (Position == Path.size() && !Path.empty() &&
     348    14897724 :       is_separator(Path.back(), S) &&
     349       85079 :       (root_dir_pos == StringRef::npos || end_pos - 1 > root_dir_pos)) {
     350       74782 :     --Position;
     351       74782 :     Component = ".";
     352       74782 :     return *this;
     353             :   }
     354             : 
     355             :   // Find next separator.
     356     7687086 :   size_t start_pos = filename_pos(Path.substr(0, end_pos), S);
     357     7687081 :   Component = Path.slice(start_pos, end_pos);
     358     7687081 :   Position = start_pos;
     359     7687081 :   return *this;
     360             : }
     361             : 
     362     3546585 : bool reverse_iterator::operator==(const reverse_iterator &RHS) const {
     363     3546585 :   return Path.begin() == RHS.Path.begin() && Component == RHS.Component &&
     364         208 :          Position == RHS.Position;
     365             : }
     366             : 
     367          51 : ptrdiff_t reverse_iterator::operator-(const reverse_iterator &RHS) const {
     368          51 :   return Position - RHS.Position;
     369             : }
     370             : 
     371    10093968 : StringRef root_path(StringRef path, Style style) {
     372    10093968 :   const_iterator b = begin(path, style), pos = b, e = end(path);
     373    10094522 :   if (b != e) {
     374             :     bool has_net =
     375     9844938 :         b->size() > 2 && is_separator((*b)[0], style) && (*b)[1] == (*b)[0];
     376             :     bool has_drive = (real_style(style) == Style::windows) && b->endswith(":");
     377             : 
     378     9844938 :     if (has_net || has_drive) {
     379         914 :       if ((++pos != e) && is_separator((*pos)[0], style)) {
     380             :         // {C:/,//net/}, so get the first two components.
     381         451 :         return path.substr(0, b->size() + pos->size());
     382             :       } else {
     383             :         // just {C:,//net}, return the first component.
     384           6 :         return *b;
     385             :       }
     386             :     }
     387             : 
     388             :     // POSIX style root directory.
     389    19688962 :     if (is_separator((*b)[0], style)) {
     390     9220211 :       return *b;
     391             :     }
     392             :   }
     393             : 
     394      873705 :   return StringRef();
     395             : }
     396             : 
     397    15518313 : StringRef root_name(StringRef path, Style style) {
     398    15518313 :   const_iterator b = begin(path, style), e = end(path);
     399    15517876 :   if (b != e) {
     400             :     bool has_net =
     401    15436199 :         b->size() > 2 && is_separator((*b)[0], style) && (*b)[1] == (*b)[0];
     402             :     bool has_drive = (real_style(style) == Style::windows) && b->endswith(":");
     403             : 
     404    15436064 :     if (has_net || has_drive) {
     405             :       // just {C:,//net}, return the first component.
     406          19 :       return *b;
     407             :     }
     408             :   }
     409             : 
     410             :   // No path or no name.
     411    15517722 :   return StringRef();
     412             : }
     413             : 
     414     6480921 : StringRef root_directory(StringRef path, Style style) {
     415     6480921 :   const_iterator b = begin(path, style), pos = b, e = end(path);
     416     6481184 :   if (b != e) {
     417             :     bool has_net =
     418     6291257 :         b->size() > 2 && is_separator((*b)[0], style) && (*b)[1] == (*b)[0];
     419             :     bool has_drive = (real_style(style) == Style::windows) && b->endswith(":");
     420             : 
     421         309 :     if ((has_net || has_drive) &&
     422             :         // {C:,//net}, skip to the next component.
     423     6291843 :         (++pos != e) && is_separator((*pos)[0], style)) {
     424         299 :       return *pos;
     425             :     }
     426             : 
     427             :     // POSIX style root directory.
     428     6290940 :     if (!has_net && is_separator((*b)[0], style)) {
     429     3185160 :       return *b;
     430             :     }
     431             :   }
     432             : 
     433             :   // No path or no root.
     434     3295679 :   return StringRef();
     435             : }
     436             : 
     437     3061678 : StringRef relative_path(StringRef path, Style style) {
     438     3061678 :   StringRef root = root_path(path, style);
     439     3061775 :   return path.substr(root.size());
     440             : }
     441             : 
     442    17806568 : void append(SmallVectorImpl<char> &path, Style style, const Twine &a,
     443             :             const Twine &b, const Twine &c, const Twine &d) {
     444             :   SmallString<32> a_storage;
     445             :   SmallString<32> b_storage;
     446             :   SmallString<32> c_storage;
     447             :   SmallString<32> d_storage;
     448             : 
     449             :   SmallVector<StringRef, 4> components;
     450    17808303 :   if (!a.isTriviallyEmpty()) components.push_back(a.toStringRef(a_storage));
     451      638439 :   if (!b.isTriviallyEmpty()) components.push_back(b.toStringRef(b_storage));
     452      490212 :   if (!c.isTriviallyEmpty()) components.push_back(c.toStringRef(c_storage));
     453      271352 :   if (!d.isTriviallyEmpty()) components.push_back(d.toStringRef(d_storage));
     454             : 
     455    37013818 :   for (auto &component : components) {
     456             :     bool path_has_sep =
     457    19207623 :         !path.empty() && is_separator(path[path.size() - 1], style);
     458             :     if (path_has_sep) {
     459             :       // Strip separators from beginning of component.
     460     2583647 :       size_t loc = component.find_first_not_of(separators(style));
     461     2583721 :       StringRef c = component.substr(loc);
     462             : 
     463             :       // Append it.
     464     2583721 :       path.append(c.begin(), c.end());
     465             :       continue;
     466             :     }
     467             : 
     468             :     bool component_has_sep =
     469    16623749 :         !component.empty() && is_separator(component[0], style);
     470    16275328 :     if (!component_has_sep &&
     471    16623777 :         !(path.empty() || has_root_name(component, style))) {
     472             :       // Add a separator.
     473    15262037 :       path.push_back(preferred_separator(style));
     474             :     }
     475             : 
     476    33246238 :     path.append(component.begin(), component.end());
     477             :   }
     478    17806195 : }
     479             : 
     480     7167240 : void append(SmallVectorImpl<char> &path, const Twine &a, const Twine &b,
     481             :             const Twine &c, const Twine &d) {
     482     7167240 :   append(path, Style::native, a, b, c, d);
     483     7167239 : }
     484             : 
     485       11692 : void append(SmallVectorImpl<char> &path, const_iterator begin,
     486             :             const_iterator end, Style style) {
     487       23686 :   for (; begin != end; ++begin)
     488       11994 :     path::append(path, style, *begin);
     489       11692 : }
     490             : 
     491     4665370 : StringRef parent_path(StringRef path, Style style) {
     492     4665370 :   size_t end_pos = parent_path_end(path, style);
     493     4665370 :   if (end_pos == StringRef::npos)
     494           0 :     return StringRef();
     495             :   else
     496     4665370 :     return path.substr(0, end_pos);
     497             : }
     498             : 
     499       42113 : void remove_filename(SmallVectorImpl<char> &path, Style style) {
     500       84226 :   size_t end_pos = parent_path_end(StringRef(path.begin(), path.size()), style);
     501       42113 :   if (end_pos != StringRef::npos)
     502             :     path.set_size(end_pos);
     503       42113 : }
     504             : 
     505       40855 : void replace_extension(SmallVectorImpl<char> &path, const Twine &extension,
     506             :                        Style style) {
     507       40855 :   StringRef p(path.begin(), path.size());
     508             :   SmallString<32> ext_storage;
     509       40855 :   StringRef ext = extension.toStringRef(ext_storage);
     510             : 
     511             :   // Erase existing extension.
     512             :   size_t pos = p.find_last_of('.');
     513       40855 :   if (pos != StringRef::npos && pos >= filename_pos(p, style))
     514             :     path.set_size(pos);
     515             : 
     516             :   // Append '.' if needed.
     517       40855 :   if (ext.size() > 0 && ext[0] != '.')
     518       39770 :     path.push_back('.');
     519             : 
     520             :   // Append extension.
     521       40855 :   path.append(ext.begin(), ext.end());
     522       40855 : }
     523             : 
     524           8 : void replace_path_prefix(SmallVectorImpl<char> &Path,
     525             :                          const StringRef &OldPrefix, const StringRef &NewPrefix,
     526             :                          Style style) {
     527           8 :   if (OldPrefix.empty() && NewPrefix.empty())
     528           5 :     return;
     529             : 
     530           8 :   StringRef OrigPath(Path.begin(), Path.size());
     531             :   if (!OrigPath.startswith(OldPrefix))
     532             :     return;
     533             : 
     534             :   // If prefixes have the same size we can simply copy the new one over.
     535           7 :   if (OldPrefix.size() == NewPrefix.size()) {
     536           4 :     std::copy(NewPrefix.begin(), NewPrefix.end(), Path.begin());
     537           4 :     return;
     538             :   }
     539             : 
     540           3 :   StringRef RelPath = OrigPath.substr(OldPrefix.size());
     541             :   SmallString<256> NewPath;
     542           3 :   path::append(NewPath, style, NewPrefix);
     543           3 :   path::append(NewPath, style, RelPath);
     544           3 :   Path.swap(NewPath);
     545             : }
     546             : 
     547      143123 : void native(const Twine &path, SmallVectorImpl<char> &result, Style style) {
     548             :   assert((!path.isSingleStringRef() ||
     549             :           path.getSingleStringRef().data() != result.data()) &&
     550             :          "path and result are not allowed to overlap!");
     551             :   // Clear result.
     552             :   result.clear();
     553      143123 :   path.toVector(result);
     554      143123 :   native(result, style);
     555      143123 : }
     556             : 
     557      152027 : void native(SmallVectorImpl<char> &Path, Style style) {
     558      152027 :   if (Path.empty())
     559             :     return;
     560             :   if (real_style(style) == Style::windows) {
     561             :     std::replace(Path.begin(), Path.end(), '/', '\\');
     562         187 :     if (Path[0] == '~' && (Path.size() == 1 || is_separator(Path[1], style))) {
     563             :       SmallString<128> PathHome;
     564           0 :       home_directory(PathHome);
     565           0 :       PathHome.append(Path.begin() + 1, Path.end());
     566           0 :       Path = PathHome;
     567             :     }
     568             :   } else {
     569    10401172 :     for (auto PI = Path.begin(), PE = Path.end(); PI < PE; ++PI) {
     570    10249336 :       if (*PI == '\\') {
     571          32 :         auto PN = PI + 1;
     572          32 :         if (PN < PE && *PN == '\\')
     573             :           ++PI; // increment once, the for loop will move over the escaped slash
     574             :         else
     575          31 :           *PI = '/';
     576             :       }
     577             :     }
     578             :   }
     579             : }
     580             : 
     581         270 : std::string convert_to_slash(StringRef path, Style style) {
     582             :   if (real_style(style) != Style::windows)
     583             :     return path;
     584             : 
     585             :   std::string s = path.str();
     586             :   std::replace(s.begin(), s.end(), '\\', '/');
     587             :   return s;
     588             : }
     589             : 
     590     1832773 : StringRef filename(StringRef path, Style style) { return *rbegin(path, style); }
     591             : 
     592      128378 : StringRef stem(StringRef path, Style style) {
     593      128378 :   StringRef fname = filename(path, style);
     594             :   size_t pos = fname.find_last_of('.');
     595      128378 :   if (pos == StringRef::npos)
     596       87944 :     return fname;
     597             :   else
     598       40434 :     if ((fname.size() == 1 && fname == ".") ||
     599             :         (fname.size() == 2 && fname == ".."))
     600          36 :       return fname;
     601             :     else
     602       40398 :       return fname.substr(0, pos);
     603             : }
     604             : 
     605       71327 : StringRef extension(StringRef path, Style style) {
     606       71327 :   StringRef fname = filename(path, style);
     607             :   size_t pos = fname.find_last_of('.');
     608       71327 :   if (pos == StringRef::npos)
     609       10753 :     return StringRef();
     610             :   else
     611       60574 :     if ((fname.size() == 1 && fname == ".") ||
     612             :         (fname.size() == 2 && fname == ".."))
     613          71 :       return StringRef();
     614             :     else
     615       60503 :       return fname.substr(pos);
     616             : }
     617             : 
     618   302786141 : bool is_separator(char value, Style style) {
     619   302786141 :   if (value == '/')
     620             :     return true;
     621             :   if (real_style(style) == Style::windows)
     622       27196 :     return value == '\\';
     623             :   return false;
     624             : }
     625             : 
     626       13865 : StringRef get_separator(Style style) {
     627             :   if (real_style(style) == Style::windows)
     628           4 :     return "\\";
     629       13861 :   return "/";
     630             : }
     631             : 
     632    15269026 : bool has_root_name(const Twine &path, Style style) {
     633             :   SmallString<128> path_storage;
     634    15269026 :   StringRef p = path.toStringRef(path_storage);
     635             : 
     636    15269129 :   return !root_name(p, style).empty();
     637             : }
     638             : 
     639     6231449 : bool has_root_directory(const Twine &path, Style style) {
     640             :   SmallString<128> path_storage;
     641     6231449 :   StringRef p = path.toStringRef(path_storage);
     642             : 
     643     6231661 :   return !root_directory(p, style).empty();
     644             : }
     645             : 
     646          41 : bool has_root_path(const Twine &path, Style style) {
     647             :   SmallString<128> path_storage;
     648          41 :   StringRef p = path.toStringRef(path_storage);
     649             : 
     650          41 :   return !root_path(p, style).empty();
     651             : }
     652             : 
     653           0 : bool has_relative_path(const Twine &path, Style style) {
     654             :   SmallString<128> path_storage;
     655           0 :   StringRef p = path.toStringRef(path_storage);
     656             : 
     657           0 :   return !relative_path(p, style).empty();
     658             : }
     659             : 
     660          41 : bool has_filename(const Twine &path, Style style) {
     661             :   SmallString<128> path_storage;
     662          41 :   StringRef p = path.toStringRef(path_storage);
     663             : 
     664          41 :   return !filename(p, style).empty();
     665             : }
     666             : 
     667        2736 : bool has_parent_path(const Twine &path, Style style) {
     668             :   SmallString<128> path_storage;
     669        2736 :   StringRef p = path.toStringRef(path_storage);
     670             : 
     671        2736 :   return !parent_path(p, style).empty();
     672             : }
     673             : 
     674          41 : bool has_stem(const Twine &path, Style style) {
     675             :   SmallString<128> path_storage;
     676          41 :   StringRef p = path.toStringRef(path_storage);
     677             : 
     678          41 :   return !stem(p, style).empty();
     679             : }
     680             : 
     681         456 : bool has_extension(const Twine &path, Style style) {
     682             :   SmallString<128> path_storage;
     683         456 :   StringRef p = path.toStringRef(path_storage);
     684             : 
     685         456 :   return !extension(p, style).empty();
     686             : }
     687             : 
     688     5943757 : bool is_absolute(const Twine &path, Style style) {
     689             :   SmallString<128> path_storage;
     690     5943757 :   StringRef p = path.toStringRef(path_storage);
     691             : 
     692     5943838 :   bool rootDir = has_root_directory(p, style);
     693             :   bool rootName =
     694        6439 :       (real_style(style) != Style::windows) || has_root_name(p, style);
     695             : 
     696     5943748 :   return rootDir && rootName;
     697             : }
     698             : 
     699      134702 : bool is_relative(const Twine &path, Style style) {
     700      134702 :   return !is_absolute(path, style);
     701             : }
     702             : 
     703      191237 : StringRef remove_leading_dotslash(StringRef Path, Style style) {
     704             :   // Remove leading "./" (or ".//" or "././" etc.)
     705      191250 :   while (Path.size() > 2 && Path[0] == '.' && is_separator(Path[1], style)) {
     706          13 :     Path = Path.substr(2);
     707          19 :     while (Path.size() > 0 && is_separator(Path[0], style))
     708           6 :       Path = Path.substr(1);
     709             :   }
     710      191237 :   return Path;
     711             : }
     712             : 
     713     2562560 : static SmallString<256> remove_dots(StringRef path, bool remove_dot_dot,
     714             :                                     Style style) {
     715             :   SmallVector<StringRef, 16> components;
     716             : 
     717             :   // Skip the root path, then look for traversal in the components.
     718     2562560 :   StringRef rel = path::relative_path(path, style);
     719    11589687 :   for (StringRef C :
     720    28304774 :        llvm::make_range(path::begin(rel, style), path::end(rel))) {
     721             :     if (C == ".")
     722             :       continue;
     723             :     // Leading ".." will remain in the path unless it's at the root.
     724    11533820 :     if (remove_dot_dot && C == "..") {
     725      749724 :       if (!components.empty() && components.back() != "..") {
     726             :         components.pop_back();
     727      168178 :         continue;
     728             :       }
     729      581546 :       if (path::is_absolute(path, style))
     730             :         continue;
     731             :     }
     732    10784120 :     components.push_back(C);
     733             :   }
     734             : 
     735     2562633 :   SmallString<256> buffer = path::root_path(path, style);
     736    13179006 :   for (StringRef C : components)
     737    10616389 :     path::append(buffer, style, C);
     738     2562617 :   return buffer;
     739             : }
     740             : 
     741     2562558 : bool remove_dots(SmallVectorImpl<char> &path, bool remove_dot_dot,
     742             :                  Style style) {
     743     5125116 :   StringRef p(path.data(), path.size());
     744             : 
     745     2562558 :   SmallString<256> result = remove_dots(p, remove_dot_dot, style);
     746     2562631 :   if (result == path)
     747             :     return false;
     748             : 
     749      690265 :   path.swap(result);
     750      690273 :   return true;
     751             : }
     752             : 
     753             : } // end namespace path
     754             : 
     755             : namespace fs {
     756             : 
     757       10539 : std::error_code getUniqueID(const Twine Path, UniqueID &Result) {
     758       10539 :   file_status Status;
     759       10539 :   std::error_code EC = status(Path, Status);
     760       10539 :   if (EC)
     761         126 :     return EC;
     762       10413 :   Result = Status.getUniqueID();
     763       10413 :   return std::error_code();
     764             : }
     765             : 
     766       14736 : std::error_code createUniqueFile(const Twine &Model, int &ResultFd,
     767             :                                  SmallVectorImpl<char> &ResultPath,
     768             :                                  unsigned Mode) {
     769       14736 :   return createUniqueEntity(Model, ResultFd, ResultPath, false, Mode, FS_File);
     770             : }
     771             : 
     772             : static std::error_code createUniqueFile(const Twine &Model, int &ResultFd,
     773             :                                         SmallVectorImpl<char> &ResultPath,
     774             :                                         unsigned Mode, OpenFlags Flags) {
     775             :   return createUniqueEntity(Model, ResultFd, ResultPath, false, Mode, FS_File,
     776        5821 :                             Flags);
     777             : }
     778             : 
     779         175 : std::error_code createUniqueFile(const Twine &Model,
     780             :                                  SmallVectorImpl<char> &ResultPath,
     781             :                                  unsigned Mode) {
     782             :   int FD;
     783         175 :   auto EC = createUniqueFile(Model, FD, ResultPath, Mode);
     784         175 :   if (EC)
     785           0 :     return EC;
     786             :   // FD is only needed to avoid race conditions. Close it right away.
     787         175 :   close(FD);
     788         175 :   return EC;
     789             : }
     790             : 
     791             : static std::error_code
     792        5870 : createTemporaryFile(const Twine &Model, int &ResultFD,
     793             :                     llvm::SmallVectorImpl<char> &ResultPath, FSEntity Type) {
     794             :   SmallString<128> Storage;
     795        5870 :   StringRef P = Model.toNullTerminatedStringRef(Storage);
     796             :   assert(P.find_first_of(separators(Style::native)) == StringRef::npos &&
     797             :          "Model must be a simple filename.");
     798             :   // Use P.begin() so that createUniqueEntity doesn't need to recreate Storage.
     799             :   return createUniqueEntity(P.begin(), ResultFD, ResultPath, true,
     800       11742 :                             owner_read | owner_write, Type);
     801             : }
     802             : 
     803             : static std::error_code
     804        5871 : createTemporaryFile(const Twine &Prefix, StringRef Suffix, int &ResultFD,
     805             :                     llvm::SmallVectorImpl<char> &ResultPath, FSEntity Type) {
     806        5871 :   const char *Middle = Suffix.empty() ? "-%%%%%%" : "-%%%%%%.";
     807        5871 :   return createTemporaryFile(Prefix + Middle + Suffix, ResultFD, ResultPath,
     808        5871 :                              Type);
     809             : }
     810             : 
     811        5870 : std::error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix,
     812             :                                     int &ResultFD,
     813             :                                     SmallVectorImpl<char> &ResultPath) {
     814        5870 :   return createTemporaryFile(Prefix, Suffix, ResultFD, ResultPath, FS_File);
     815             : }
     816             : 
     817        5627 : std::error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix,
     818             :                                     SmallVectorImpl<char> &ResultPath) {
     819             :   int FD;
     820        5627 :   auto EC = createTemporaryFile(Prefix, Suffix, FD, ResultPath);
     821        5627 :   if (EC)
     822           0 :     return EC;
     823             :   // FD is only needed to avoid race conditions. Close it right away.
     824        5627 :   close(FD);
     825        5627 :   return EC;
     826             : }
     827             : 
     828             : 
     829             : // This is a mkdtemp with a different pattern. We use createUniqueEntity mostly
     830             : // for consistency. We should try using mkdtemp.
     831          56 : std::error_code createUniqueDirectory(const Twine &Prefix,
     832             :                                       SmallVectorImpl<char> &ResultPath) {
     833             :   int Dummy;
     834          56 :   return createUniqueEntity(Prefix + "-%%%%%%", Dummy, ResultPath, true, 0,
     835          56 :                             FS_Dir);
     836             : }
     837             : 
     838             : std::error_code
     839           0 : getPotentiallyUniqueFileName(const Twine &Model,
     840             :                              SmallVectorImpl<char> &ResultPath) {
     841             :   int Dummy;
     842           0 :   return createUniqueEntity(Model, Dummy, ResultPath, false, 0, FS_Name);
     843             : }
     844             : 
     845             : std::error_code
     846           1 : getPotentiallyUniqueTempFileName(const Twine &Prefix, StringRef Suffix,
     847             :                                  SmallVectorImpl<char> &ResultPath) {
     848             :   int Dummy;
     849           1 :   return createTemporaryFile(Prefix, Suffix, Dummy, ResultPath, FS_Name);
     850             : }
     851             : 
     852      287758 : static std::error_code make_absolute(const Twine &current_directory,
     853             :                                      SmallVectorImpl<char> &path,
     854             :                                      bool use_current_directory) {
     855      575516 :   StringRef p(path.data(), path.size());
     856             : 
     857      287758 :   bool rootDirectory = path::has_root_directory(p);
     858             :   bool rootName =
     859             :       (real_style(Style::native) != Style::windows) || path::has_root_name(p);
     860             : 
     861             :   // Already absolute.
     862      287755 :   if (rootName && rootDirectory)
     863       38412 :     return std::error_code();
     864             : 
     865             :   // All of the following conditions will need the current directory.
     866             :   SmallString<128> current_dir;
     867      249343 :   if (use_current_directory)
     868      242190 :     current_directory.toVector(current_dir);
     869        7153 :   else if (std::error_code ec = current_path(current_dir))
     870           0 :     return ec;
     871             : 
     872             :   // Relative path. Prepend the current directory.
     873             :   if (!rootName && !rootDirectory) {
     874             :     // Append path to the current directory.
     875             :     path::append(current_dir, p);
     876             :     // Set path to the result.
     877             :     path.swap(current_dir);
     878             :     return std::error_code();
     879             :   }
     880             : 
     881             :   if (!rootName && rootDirectory) {
     882             :     StringRef cdrn = path::root_name(current_dir);
     883             :     SmallString<128> curDirRootName(cdrn.begin(), cdrn.end());
     884             :     path::append(curDirRootName, p);
     885             :     // Set path to the result.
     886             :     path.swap(curDirRootName);
     887             :     return std::error_code();
     888             :   }
     889             : 
     890             :   if (rootName && !rootDirectory) {
     891      249348 :     StringRef pRootName      = path::root_name(p);
     892      249341 :     StringRef bRootDirectory = path::root_directory(current_dir);
     893      249345 :     StringRef bRelativePath  = path::relative_path(current_dir);
     894      249339 :     StringRef pRelativePath  = path::relative_path(p);
     895             : 
     896             :     SmallString<128> res;
     897      249348 :     path::append(res, pRootName, bRootDirectory, bRelativePath, pRelativePath);
     898      249349 :     path.swap(res);
     899      249353 :     return std::error_code();
     900             :   }
     901             : 
     902             :   llvm_unreachable("All rootName and rootDirectory combinations should have "
     903             :                    "occurred above!");
     904             : }
     905             : 
     906      242277 : std::error_code make_absolute(const Twine &current_directory,
     907             :                               SmallVectorImpl<char> &path) {
     908      242277 :   return make_absolute(current_directory, path, true);
     909             : }
     910             : 
     911       45480 : std::error_code make_absolute(SmallVectorImpl<char> &path) {
     912       45480 :   return make_absolute(Twine(), path, false);
     913             : }
     914             : 
     915        3169 : std::error_code create_directories(const Twine &Path, bool IgnoreExisting,
     916             :                                    perms Perms) {
     917             :   SmallString<128> PathStorage;
     918        3169 :   StringRef P = Path.toStringRef(PathStorage);
     919             : 
     920             :   // Be optimistic and try to create the directory
     921        6338 :   std::error_code EC = create_directory(P, IgnoreExisting, Perms);
     922             :   // If we succeeded, or had any error other than the parent not existing, just
     923             :   // return it.
     924             :   if (EC != errc::no_such_file_or_directory)
     925        2121 :     return EC;
     926             : 
     927             :   // We failed because of a no_such_file_or_directory, try to create the
     928             :   // parent.
     929        1048 :   StringRef Parent = path::parent_path(P);
     930        1048 :   if (Parent.empty())
     931           0 :     return EC;
     932             : 
     933        1048 :   if ((EC = create_directories(Parent, IgnoreExisting, Perms)))
     934         520 :       return EC;
     935             : 
     936         528 :   return create_directory(P, IgnoreExisting, Perms);
     937             : }
     938             : 
     939         310 : static std::error_code copy_file_internal(int ReadFD, int WriteFD) {
     940             :   const size_t BufSize = 4096;
     941         310 :   char *Buf = new char[BufSize];
     942             :   int BytesRead = 0, BytesWritten = 0;
     943             :   for (;;) {
     944         641 :     BytesRead = read(ReadFD, Buf, BufSize);
     945         641 :     if (BytesRead <= 0)
     946             :       break;
     947         662 :     while (BytesRead) {
     948         331 :       BytesWritten = write(WriteFD, Buf, BytesRead);
     949         331 :       if (BytesWritten < 0)
     950             :         break;
     951         331 :       BytesRead -= BytesWritten;
     952             :     }
     953         331 :     if (BytesWritten < 0)
     954             :       break;
     955             :   }
     956         310 :   delete[] Buf;
     957             : 
     958         310 :   if (BytesRead < 0 || BytesWritten < 0)
     959           0 :     return std::error_code(errno, std::generic_category());
     960         310 :   return std::error_code();
     961             : }
     962             : 
     963         313 : std::error_code copy_file(const Twine &From, const Twine &To) {
     964             :   int ReadFD, WriteFD;
     965         313 :   if (std::error_code EC = openFileForRead(From, ReadFD, OF_None))
     966           4 :     return EC;
     967         309 :   if (std::error_code EC =
     968             :           openFileForWrite(To, WriteFD, CD_CreateAlways, OF_None)) {
     969           0 :     close(ReadFD);
     970           0 :     return EC;
     971             :   }
     972             : 
     973         309 :   std::error_code EC = copy_file_internal(ReadFD, WriteFD);
     974             : 
     975         309 :   close(ReadFD);
     976         309 :   close(WriteFD);
     977             : 
     978         309 :   return EC;
     979             : }
     980             : 
     981           1 : std::error_code copy_file(const Twine &From, int ToFD) {
     982             :   int ReadFD;
     983           1 :   if (std::error_code EC = openFileForRead(From, ReadFD, OF_None))
     984           0 :     return EC;
     985             : 
     986           1 :   std::error_code EC = copy_file_internal(ReadFD, ToFD);
     987             : 
     988           1 :   close(ReadFD);
     989             : 
     990           1 :   return EC;
     991             : }
     992             : 
     993           1 : ErrorOr<MD5::MD5Result> md5_contents(int FD) {
     994           1 :   MD5 Hash;
     995             : 
     996             :   constexpr size_t BufSize = 4096;
     997           1 :   std::vector<uint8_t> Buf(BufSize);
     998             :   int BytesRead = 0;
     999             :   for (;;) {
    1000           2 :     BytesRead = read(FD, Buf.data(), BufSize);
    1001           2 :     if (BytesRead <= 0)
    1002             :       break;
    1003           1 :     Hash.update(makeArrayRef(Buf.data(), BytesRead));
    1004             :   }
    1005             : 
    1006           1 :   if (BytesRead < 0)
    1007           0 :     return std::error_code(errno, std::generic_category());
    1008             :   MD5::MD5Result Result;
    1009           1 :   Hash.final(Result);
    1010             :   return Result;
    1011             : }
    1012             : 
    1013           0 : ErrorOr<MD5::MD5Result> md5_contents(const Twine &Path) {
    1014             :   int FD;
    1015           0 :   if (auto EC = openFileForRead(Path, FD, OF_None))
    1016           0 :     return EC;
    1017             : 
    1018           0 :   auto Result = md5_contents(FD);
    1019           0 :   close(FD);
    1020             :   return Result;
    1021             : }
    1022             : 
    1023       12192 : bool exists(const basic_file_status &status) {
    1024       12192 :   return status_known(status) && status.type() != file_type::file_not_found;
    1025             : }
    1026             : 
    1027       12192 : bool status_known(const basic_file_status &s) {
    1028       12192 :   return s.type() != file_type::status_error;
    1029             : }
    1030             : 
    1031           8 : file_type get_file_type(const Twine &Path, bool Follow) {
    1032           8 :   file_status st;
    1033           8 :   if (status(Path, st, Follow))
    1034             :     return file_type::status_error;
    1035           8 :   return st.type();
    1036             : }
    1037             : 
    1038        6130 : bool is_directory(const basic_file_status &status) {
    1039        6130 :   return status.type() == file_type::directory_file;
    1040             : }
    1041             : 
    1042        6658 : std::error_code is_directory(const Twine &path, bool &result) {
    1043        6658 :   file_status st;
    1044        6658 :   if (std::error_code ec = status(path, st))
    1045         932 :     return ec;
    1046        5726 :   result = is_directory(st);
    1047        5726 :   return std::error_code();
    1048             : }
    1049             : 
    1050        7502 : bool is_regular_file(const basic_file_status &status) {
    1051        7502 :   return status.type() == file_type::regular_file;
    1052             : }
    1053             : 
    1054        7870 : std::error_code is_regular_file(const Twine &path, bool &result) {
    1055        7870 :   file_status st;
    1056        7870 :   if (std::error_code ec = status(path, st))
    1057        2834 :     return ec;
    1058        5036 :   result = is_regular_file(st);
    1059        5036 :   return std::error_code();
    1060             : }
    1061             : 
    1062          67 : bool is_symlink_file(const basic_file_status &status) {
    1063          67 :   return status.type() == file_type::symlink_file;
    1064             : }
    1065             : 
    1066           0 : std::error_code is_symlink_file(const Twine &path, bool &result) {
    1067           0 :   file_status st;
    1068           0 :   if (std::error_code ec = status(path, st, false))
    1069           0 :     return ec;
    1070           0 :   result = is_symlink_file(st);
    1071           0 :   return std::error_code();
    1072             : }
    1073             : 
    1074           0 : bool is_other(const basic_file_status &status) {
    1075           0 :   return exists(status) &&
    1076           0 :          !is_regular_file(status) &&
    1077           0 :          !is_directory(status);
    1078             : }
    1079             : 
    1080           0 : std::error_code is_other(const Twine &Path, bool &Result) {
    1081           0 :   file_status FileStatus;
    1082           0 :   if (std::error_code EC = status(Path, FileStatus))
    1083           0 :     return EC;
    1084           0 :   Result = is_other(FileStatus);
    1085           0 :   return std::error_code();
    1086             : }
    1087             : 
    1088       56958 : void directory_entry::replace_filename(const Twine &Filename, file_type Type,
    1089             :                                        basic_file_status Status) {
    1090      113916 :   SmallString<128> PathStr = path::parent_path(Path);
    1091       56958 :   path::append(PathStr, Filename);
    1092       56958 :   this->Path = PathStr.str();
    1093       56958 :   this->Type = Type;
    1094       56958 :   this->Status = Status;
    1095       56958 : }
    1096             : 
    1097          25 : ErrorOr<perms> getPermissions(const Twine &Path) {
    1098          25 :   file_status Status;
    1099          25 :   if (std::error_code EC = status(Path, Status))
    1100           0 :     return EC;
    1101             : 
    1102          25 :   return Status.permissions();
    1103             : }
    1104             : 
    1105             : } // end namespace fs
    1106             : } // end namespace sys
    1107             : } // end namespace llvm
    1108             : 
    1109             : // Include the truly platform-specific parts.
    1110             : #if defined(LLVM_ON_UNIX)
    1111             : #include "Unix/Path.inc"
    1112             : #endif
    1113             : #if defined(_WIN32)
    1114             : #include "Windows/Path.inc"
    1115             : #endif
    1116             : 
    1117             : namespace llvm {
    1118             : namespace sys {
    1119             : namespace fs {
    1120        5810 : TempFile::TempFile(StringRef Name, int FD) : TmpName(Name), FD(FD) {}
    1121       43126 : TempFile::TempFile(TempFile &&Other) { *this = std::move(Other); }
    1122       21563 : TempFile &TempFile::operator=(TempFile &&Other) {
    1123       21563 :   TmpName = std::move(Other.TmpName);
    1124       21563 :   FD = Other.FD;
    1125       21563 :   Other.Done = true;
    1126       21563 :   return *this;
    1127             : }
    1128             : 
    1129       27372 : TempFile::~TempFile() { assert(Done); }
    1130             : 
    1131        5403 : Error TempFile::discard() {
    1132        5403 :   Done = true;
    1133             :   std::error_code RemoveEC;
    1134             : // On windows closing will remove the file.
    1135             : #ifndef _WIN32
    1136             :   // Always try to close and remove.
    1137        5403 :   if (!TmpName.empty()) {
    1138        4748 :     RemoveEC = fs::remove(TmpName);
    1139        2374 :     sys::DontRemoveFileOnSignal(TmpName);
    1140             :   }
    1141             : #endif
    1142             : 
    1143        5403 :   if (!RemoveEC)
    1144        5403 :     TmpName = "";
    1145             : 
    1146        5403 :   if (FD != -1 && close(FD) == -1) {
    1147           0 :     std::error_code EC = std::error_code(errno, std::generic_category());
    1148           0 :     return errorCodeToError(EC);
    1149             :   }
    1150        5403 :   FD = -1;
    1151             : 
    1152        5403 :   return errorCodeToError(RemoveEC);
    1153             : }
    1154             : 
    1155        3435 : Error TempFile::keep(const Twine &Name) {
    1156             :   assert(!Done);
    1157        3435 :   Done = true;
    1158             :   // Always try to close and rename.
    1159             : #ifdef _WIN32
    1160             :   // If we can't cancel the delete don't rename.
    1161             :   auto H = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
    1162             :   std::error_code RenameEC = setDeleteDisposition(H, false);
    1163             :   if (!RenameEC) {
    1164             :     RenameEC = rename_fd(FD, Name);
    1165             :     // If rename failed because it's cross-device, copy instead
    1166             :     if (RenameEC ==
    1167             :       std::error_code(ERROR_NOT_SAME_DEVICE, std::system_category())) {
    1168             :       RenameEC = copy_file(TmpName, Name);
    1169             :       setDeleteDisposition(H, true);
    1170             :     }
    1171             :   }
    1172             : 
    1173             :   // If we can't rename, discard the temporary file.
    1174             :   if (RenameEC)
    1175             :     setDeleteDisposition(H, true);
    1176             : #else
    1177        6870 :   std::error_code RenameEC = fs::rename(TmpName, Name);
    1178        3435 :   if (RenameEC) {
    1179             :     // If we can't rename, try to copy to work around cross-device link issues.
    1180           0 :     RenameEC = sys::fs::copy_file(TmpName, Name);
    1181             :     // If we can't rename or copy, discard the temporary file.
    1182           0 :     if (RenameEC)
    1183           0 :       remove(TmpName);
    1184             :   }
    1185        3435 :   sys::DontRemoveFileOnSignal(TmpName);
    1186             : #endif
    1187             : 
    1188        3435 :   if (!RenameEC)
    1189             :     TmpName = "";
    1190             : 
    1191        3435 :   if (close(FD) == -1) {
    1192           0 :     std::error_code EC(errno, std::generic_category());
    1193           0 :     return errorCodeToError(EC);
    1194             :   }
    1195        3435 :   FD = -1;
    1196             : 
    1197        3435 :   return errorCodeToError(RenameEC);
    1198             : }
    1199             : 
    1200           0 : Error TempFile::keep() {
    1201             :   assert(!Done);
    1202           0 :   Done = true;
    1203             : 
    1204             : #ifdef _WIN32
    1205             :   auto H = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
    1206             :   if (std::error_code EC = setDeleteDisposition(H, false))
    1207             :     return errorCodeToError(EC);
    1208             : #else
    1209           0 :   sys::DontRemoveFileOnSignal(TmpName);
    1210             : #endif
    1211             : 
    1212           0 :   TmpName = "";
    1213             : 
    1214           0 :   if (close(FD) == -1) {
    1215           0 :     std::error_code EC(errno, std::generic_category());
    1216           0 :     return errorCodeToError(EC);
    1217             :   }
    1218           0 :   FD = -1;
    1219             : 
    1220             :   return Error::success();
    1221             : }
    1222             : 
    1223        5821 : Expected<TempFile> TempFile::create(const Twine &Model, unsigned Mode) {
    1224             :   int FD;
    1225             :   SmallString<128> ResultPath;
    1226        5821 :   if (std::error_code EC =
    1227        5821 :           createUniqueFile(Model, FD, ResultPath, Mode, OF_Delete))
    1228          11 :     return errorCodeToError(EC);
    1229             : 
    1230       17430 :   TempFile Ret(ResultPath, FD);
    1231             : #ifndef _WIN32
    1232        5810 :   if (sys::RemoveFileOnSignal(ResultPath)) {
    1233             :     // Make sure we delete the file when RemoveFileOnSignal fails.
    1234           0 :     consumeError(Ret.discard());
    1235             :     std::error_code EC(errc::operation_not_permitted);
    1236           0 :     return errorCodeToError(EC);
    1237             :   }
    1238             : #endif
    1239             :   return std::move(Ret);
    1240             : }
    1241             : }
    1242             : 
    1243             : } // end namsspace sys
    1244             : } // end namespace llvm

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