1 //===--- HeaderSearch.cpp - Resolve Header File Locations ---===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the DirectoryLookup and HeaderSearch interfaces.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Lex/HeaderSearch.h"
15 #include "clang/Basic/Diagnostic.h"
16 #include "clang/Basic/FileManager.h"
17 #include "clang/Basic/IdentifierTable.h"
18 #include "clang/Lex/HeaderMap.h"
19 #include "clang/Lex/HeaderSearchOptions.h"
20 #include "clang/Lex/Lexer.h"
21 #include "llvm/ADT/SmallString.h"
22 #include "llvm/Support/Capacity.h"
23 #include "llvm/Support/FileSystem.h"
24 #include "llvm/Support/Path.h"
26 using namespace clang;
28 const IdentifierInfo *
29 HeaderFileInfo::getControllingMacro(ExternalIdentifierLookup *External) {
31 return ControllingMacro;
33 if (!ControllingMacroID || !External)
36 ControllingMacro = External->GetIdentifier(ControllingMacroID);
37 return ControllingMacro;
40 ExternalHeaderFileInfoSource::~ExternalHeaderFileInfoSource() {}
42 HeaderSearch::HeaderSearch(llvm::IntrusiveRefCntPtr<HeaderSearchOptions> HSOpts,
43 FileManager &FM, DiagnosticsEngine &Diags,
44 const LangOptions &LangOpts,
45 const TargetInfo *Target)
46 : HSOpts(HSOpts), FileMgr(FM), FrameworkMap(64),
47 ModMap(FileMgr, *Diags.getClient(), LangOpts, Target)
51 NoCurDirSearch = false;
56 NumMultiIncludeFileOptzn = 0;
57 NumFrameworkLookups = NumSubFrameworkLookups = 0;
60 HeaderSearch::~HeaderSearch() {
62 for (unsigned i = 0, e = HeaderMaps.size(); i != e; ++i)
63 delete HeaderMaps[i].second;
66 void HeaderSearch::PrintStats() {
67 fprintf(stderr, "\n*** HeaderSearch Stats:\n");
68 fprintf(stderr, "%d files tracked.\n", (int)FileInfo.size());
69 unsigned NumOnceOnlyFiles = 0, MaxNumIncludes = 0, NumSingleIncludedFiles = 0;
70 for (unsigned i = 0, e = FileInfo.size(); i != e; ++i) {
71 NumOnceOnlyFiles += FileInfo[i].isImport;
72 if (MaxNumIncludes < FileInfo[i].NumIncludes)
73 MaxNumIncludes = FileInfo[i].NumIncludes;
74 NumSingleIncludedFiles += FileInfo[i].NumIncludes == 1;
76 fprintf(stderr, " %d #import/#pragma once files.\n", NumOnceOnlyFiles);
77 fprintf(stderr, " %d included exactly once.\n", NumSingleIncludedFiles);
78 fprintf(stderr, " %d max times a file is included.\n", MaxNumIncludes);
80 fprintf(stderr, " %d #include/#include_next/#import.\n", NumIncluded);
81 fprintf(stderr, " %d #includes skipped due to"
82 " the multi-include optimization.\n", NumMultiIncludeFileOptzn);
84 fprintf(stderr, "%d framework lookups.\n", NumFrameworkLookups);
85 fprintf(stderr, "%d subframework lookups.\n", NumSubFrameworkLookups);
88 /// CreateHeaderMap - This method returns a HeaderMap for the specified
89 /// FileEntry, uniquing them through the 'HeaderMaps' datastructure.
90 const HeaderMap *HeaderSearch::CreateHeaderMap(const FileEntry *FE) {
91 // We expect the number of headermaps to be small, and almost always empty.
92 // If it ever grows, use of a linear search should be re-evaluated.
93 if (!HeaderMaps.empty()) {
94 for (unsigned i = 0, e = HeaderMaps.size(); i != e; ++i)
95 // Pointer equality comparison of FileEntries works because they are
96 // already uniqued by inode.
97 if (HeaderMaps[i].first == FE)
98 return HeaderMaps[i].second;
101 if (const HeaderMap *HM = HeaderMap::Create(FE, FileMgr)) {
102 HeaderMaps.push_back(std::make_pair(FE, HM));
109 std::string HeaderSearch::getModuleFileName(Module *Module) {
110 // If we don't have a module cache path, we can't do anything.
111 if (ModuleCachePath.empty())
112 return std::string();
115 SmallString<256> Result(ModuleCachePath);
116 llvm::sys::path::append(Result, Module->getTopLevelModule()->Name + ".pcm");
117 return Result.str().str();
120 std::string HeaderSearch::getModuleFileName(StringRef ModuleName) {
121 // If we don't have a module cache path, we can't do anything.
122 if (ModuleCachePath.empty())
123 return std::string();
126 SmallString<256> Result(ModuleCachePath);
127 llvm::sys::path::append(Result, ModuleName + ".pcm");
128 return Result.str().str();
131 Module *HeaderSearch::lookupModule(StringRef ModuleName, bool AllowSearch) {
132 // Look in the module map to determine if there is a module by this name.
133 Module *Module = ModMap.findModule(ModuleName);
134 if (Module || !AllowSearch)
137 // Look through the various header search paths to load any available module
138 // maps, searching for a module map that describes this module.
139 for (unsigned Idx = 0, N = SearchDirs.size(); Idx != N; ++Idx) {
140 if (SearchDirs[Idx].isFramework()) {
141 // Search for or infer a module map for a framework.
142 SmallString<128> FrameworkDirName;
143 FrameworkDirName += SearchDirs[Idx].getFrameworkDir()->getName();
144 llvm::sys::path::append(FrameworkDirName, ModuleName + ".framework");
145 if (const DirectoryEntry *FrameworkDir
146 = FileMgr.getDirectory(FrameworkDirName)) {
148 = SearchDirs[Idx].getDirCharacteristic() != SrcMgr::C_User;
149 Module = loadFrameworkModule(ModuleName, FrameworkDir, IsSystem);
155 // FIXME: Figure out how header maps and module maps will work together.
157 // Only deal with normal search directories.
158 if (!SearchDirs[Idx].isNormalDir())
161 // Search for a module map file in this directory.
162 if (loadModuleMapFile(SearchDirs[Idx].getDir()) == LMM_NewlyLoaded) {
163 // We just loaded a module map file; check whether the module is
165 Module = ModMap.findModule(ModuleName);
170 // Search for a module map in a subdirectory with the same name as the
172 SmallString<128> NestedModuleMapDirName;
173 NestedModuleMapDirName = SearchDirs[Idx].getDir()->getName();
174 llvm::sys::path::append(NestedModuleMapDirName, ModuleName);
175 if (loadModuleMapFile(NestedModuleMapDirName) == LMM_NewlyLoaded) {
176 // If we just loaded a module map file, look for the module again.
177 Module = ModMap.findModule(ModuleName);
186 //===----------------------------------------------------------------------===//
187 // File lookup within a DirectoryLookup scope
188 //===----------------------------------------------------------------------===//
190 /// getName - Return the directory or filename corresponding to this lookup
192 const char *DirectoryLookup::getName() const {
194 return getDir()->getName();
196 return getFrameworkDir()->getName();
197 assert(isHeaderMap() && "Unknown DirectoryLookup");
198 return getHeaderMap()->getFileName();
202 /// LookupFile - Lookup the specified file in this search path, returning it
203 /// if it exists or returning null if not.
204 const FileEntry *DirectoryLookup::LookupFile(
207 SmallVectorImpl<char> *SearchPath,
208 SmallVectorImpl<char> *RelativePath,
209 Module **SuggestedModule,
210 bool &InUserSpecifiedSystemFramework) const {
211 InUserSpecifiedSystemFramework = false;
213 SmallString<1024> TmpDir;
215 // Concatenate the requested file onto the directory.
216 TmpDir = getDir()->getName();
217 llvm::sys::path::append(TmpDir, Filename);
218 if (SearchPath != NULL) {
219 StringRef SearchPathRef(getDir()->getName());
221 SearchPath->append(SearchPathRef.begin(), SearchPathRef.end());
223 if (RelativePath != NULL) {
224 RelativePath->clear();
225 RelativePath->append(Filename.begin(), Filename.end());
228 // If we have a module map that might map this header, load it and
229 // check whether we'll have a suggestion for a module.
230 if (SuggestedModule && HS.hasModuleMap(TmpDir, getDir())) {
231 const FileEntry *File = HS.getFileMgr().getFile(TmpDir.str(),
236 // If there is a module that corresponds to this header,
238 *SuggestedModule = HS.findModuleForHeader(File);
242 return HS.getFileMgr().getFile(TmpDir.str(), /*openFile=*/true);
246 return DoFrameworkLookup(Filename, HS, SearchPath, RelativePath,
247 SuggestedModule, InUserSpecifiedSystemFramework);
249 assert(isHeaderMap() && "Unknown directory lookup");
250 const FileEntry * const Result = getHeaderMap()->LookupFile(
251 Filename, HS.getFileMgr());
253 if (SearchPath != NULL) {
254 StringRef SearchPathRef(getName());
256 SearchPath->append(SearchPathRef.begin(), SearchPathRef.end());
258 if (RelativePath != NULL) {
259 RelativePath->clear();
260 RelativePath->append(Filename.begin(), Filename.end());
266 /// \brief Given a framework directory, find the top-most framework directory.
268 /// \param FileMgr The file manager to use for directory lookups.
269 /// \param DirName The name of the framework directory.
270 /// \param SubmodulePath Will be populated with the submodule path from the
271 /// returned top-level module to the originally named framework.
272 static const DirectoryEntry *
273 getTopFrameworkDir(FileManager &FileMgr, StringRef DirName,
274 SmallVectorImpl<std::string> &SubmodulePath) {
275 assert(llvm::sys::path::extension(DirName) == ".framework" &&
276 "Not a framework directory");
279 // Note: as an egregious but useful hack we use the real path here, because
280 // frameworks moving between top-level frameworks to embedded frameworks tend
281 // to be symlinked, and we base the logical structure of modules on the
282 // physical layout. In particular, we need to deal with crazy includes like
284 // #include <Foo/Frameworks/Bar.framework/Headers/Wibble.h>
286 // where 'Bar' used to be embedded in 'Foo', is now a top-level framework
287 // which one should access with, e.g.,
289 // #include <Bar/Wibble.h>
291 // Similar issues occur when a top-level framework has moved into an
292 // embedded framework.
293 char RealDirName[PATH_MAX];
294 if (realpath(DirName.str().c_str(), RealDirName))
295 DirName = RealDirName;
298 const DirectoryEntry *TopFrameworkDir = FileMgr.getDirectory(DirName);
300 // Get the parent directory name.
301 DirName = llvm::sys::path::parent_path(DirName);
305 // Determine whether this directory exists.
306 const DirectoryEntry *Dir = FileMgr.getDirectory(DirName);
310 // If this is a framework directory, then we're a subframework of this
312 if (llvm::sys::path::extension(DirName) == ".framework") {
313 SubmodulePath.push_back(llvm::sys::path::stem(DirName));
314 TopFrameworkDir = Dir;
318 return TopFrameworkDir;
321 /// DoFrameworkLookup - Do a lookup of the specified file in the current
322 /// DirectoryLookup, which is a framework directory.
323 const FileEntry *DirectoryLookup::DoFrameworkLookup(
326 SmallVectorImpl<char> *SearchPath,
327 SmallVectorImpl<char> *RelativePath,
328 Module **SuggestedModule,
329 bool &InUserSpecifiedSystemFramework) const
331 FileManager &FileMgr = HS.getFileMgr();
333 // Framework names must have a '/' in the filename.
334 size_t SlashPos = Filename.find('/');
335 if (SlashPos == StringRef::npos) return 0;
337 // Find out if this is the home for the specified framework, by checking
338 // HeaderSearch. Possible answers are yes/no and unknown.
339 HeaderSearch::FrameworkCacheEntry &CacheEntry =
340 HS.LookupFrameworkCache(Filename.substr(0, SlashPos));
342 // If it is known and in some other directory, fail.
343 if (CacheEntry.Directory && CacheEntry.Directory != getFrameworkDir())
346 // Otherwise, construct the path to this framework dir.
348 // FrameworkName = "/System/Library/Frameworks/"
349 SmallString<1024> FrameworkName;
350 FrameworkName += getFrameworkDir()->getName();
351 if (FrameworkName.empty() || FrameworkName.back() != '/')
352 FrameworkName.push_back('/');
354 // FrameworkName = "/System/Library/Frameworks/Cocoa"
355 StringRef ModuleName(Filename.begin(), SlashPos);
356 FrameworkName += ModuleName;
358 // FrameworkName = "/System/Library/Frameworks/Cocoa.framework/"
359 FrameworkName += ".framework/";
361 // If the cache entry was unresolved, populate it now.
362 if (CacheEntry.Directory == 0) {
363 HS.IncrementFrameworkLookupCount();
365 // If the framework dir doesn't exist, we fail.
366 const DirectoryEntry *Dir = FileMgr.getDirectory(FrameworkName.str());
367 if (Dir == 0) return 0;
369 // Otherwise, if it does, remember that this is the right direntry for this
371 CacheEntry.Directory = getFrameworkDir();
373 // If this is a user search directory, check if the framework has been
374 // user-specified as a system framework.
375 if (getDirCharacteristic() == SrcMgr::C_User) {
376 SmallString<1024> SystemFrameworkMarker(FrameworkName);
377 SystemFrameworkMarker += ".system_framework";
378 if (llvm::sys::fs::exists(SystemFrameworkMarker.str())) {
379 CacheEntry.IsUserSpecifiedSystemFramework = true;
384 // Set the 'user-specified system framework' flag.
385 InUserSpecifiedSystemFramework = CacheEntry.IsUserSpecifiedSystemFramework;
387 if (RelativePath != NULL) {
388 RelativePath->clear();
389 RelativePath->append(Filename.begin()+SlashPos+1, Filename.end());
392 // Check "/System/Library/Frameworks/Cocoa.framework/Headers/file.h"
393 unsigned OrigSize = FrameworkName.size();
395 FrameworkName += "Headers/";
397 if (SearchPath != NULL) {
399 // Without trailing '/'.
400 SearchPath->append(FrameworkName.begin(), FrameworkName.end()-1);
403 FrameworkName.append(Filename.begin()+SlashPos+1, Filename.end());
404 const FileEntry *FE = FileMgr.getFile(FrameworkName.str(),
405 /*openFile=*/!SuggestedModule);
407 // Check "/System/Library/Frameworks/Cocoa.framework/PrivateHeaders/file.h"
408 const char *Private = "Private";
409 FrameworkName.insert(FrameworkName.begin()+OrigSize, Private,
410 Private+strlen(Private));
411 if (SearchPath != NULL)
412 SearchPath->insert(SearchPath->begin()+OrigSize, Private,
413 Private+strlen(Private));
415 FE = FileMgr.getFile(FrameworkName.str(), /*openFile=*/!SuggestedModule);
418 // If we found the header and are allowed to suggest a module, do so now.
419 if (FE && SuggestedModule) {
420 // Find the framework in which this header occurs.
421 StringRef FrameworkPath = FE->getName();
422 bool FoundFramework = false;
424 // Get the parent directory name.
425 FrameworkPath = llvm::sys::path::parent_path(FrameworkPath);
426 if (FrameworkPath.empty())
429 // Determine whether this directory exists.
430 const DirectoryEntry *Dir = FileMgr.getDirectory(FrameworkPath);
434 // If this is a framework directory, then we're a subframework of this
436 if (llvm::sys::path::extension(FrameworkPath) == ".framework") {
437 FoundFramework = true;
442 if (FoundFramework) {
443 // Find the top-level framework based on this framework.
444 SmallVector<std::string, 4> SubmodulePath;
445 const DirectoryEntry *TopFrameworkDir
446 = ::getTopFrameworkDir(FileMgr, FrameworkPath, SubmodulePath);
448 // Determine the name of the top-level framework.
449 StringRef ModuleName = llvm::sys::path::stem(TopFrameworkDir->getName());
451 // Load this framework module. If that succeeds, find the suggested module
452 // for this header, if any.
453 bool IsSystem = getDirCharacteristic() != SrcMgr::C_User;
454 if (HS.loadFrameworkModule(ModuleName, TopFrameworkDir, IsSystem)) {
455 *SuggestedModule = HS.findModuleForHeader(FE);
458 *SuggestedModule = HS.findModuleForHeader(FE);
464 void HeaderSearch::setTarget(const TargetInfo &Target) {
465 ModMap.setTarget(Target);
469 //===----------------------------------------------------------------------===//
470 // Header File Location.
471 //===----------------------------------------------------------------------===//
474 /// LookupFile - Given a "foo" or \<foo> reference, look up the indicated file,
475 /// return null on failure. isAngled indicates whether the file reference is
476 /// for system \#include's or not (i.e. using <> instead of ""). CurFileEnt, if
477 /// non-null, indicates where the \#including file is, in case a relative search
479 const FileEntry *HeaderSearch::LookupFile(
482 const DirectoryLookup *FromDir,
483 const DirectoryLookup *&CurDir,
484 const FileEntry *CurFileEnt,
485 SmallVectorImpl<char> *SearchPath,
486 SmallVectorImpl<char> *RelativePath,
487 Module **SuggestedModule,
491 *SuggestedModule = 0;
493 // If 'Filename' is absolute, check to see if it exists and no searching.
494 if (llvm::sys::path::is_absolute(Filename)) {
497 // If this was an #include_next "/absolute/file", fail.
498 if (FromDir) return 0;
500 if (SearchPath != NULL)
502 if (RelativePath != NULL) {
503 RelativePath->clear();
504 RelativePath->append(Filename.begin(), Filename.end());
506 // Otherwise, just return the file.
507 return FileMgr.getFile(Filename, /*openFile=*/true);
510 // Unless disabled, check to see if the file is in the #includer's
511 // directory. This has to be based on CurFileEnt, not CurDir, because
512 // CurFileEnt could be a #include of a subdirectory (#include "foo/bar.h") and
513 // a subsequent include of "baz.h" should resolve to "whatever/foo/baz.h".
514 // This search is not done for <> headers.
515 if (CurFileEnt && !isAngled && !NoCurDirSearch) {
516 SmallString<1024> TmpDir;
517 // Concatenate the requested file onto the directory.
518 // FIXME: Portability. Filename concatenation should be in sys::Path.
519 TmpDir += CurFileEnt->getDir()->getName();
520 TmpDir.push_back('/');
521 TmpDir.append(Filename.begin(), Filename.end());
522 if (const FileEntry *FE = FileMgr.getFile(TmpDir.str(),/*openFile=*/true)) {
523 // Leave CurDir unset.
524 // This file is a system header or C++ unfriendly if the old file is.
526 // Note that we only use one of FromHFI/ToHFI at once, due to potential
527 // reallocation of the underlying vector potentially making the first
528 // reference binding dangling.
529 HeaderFileInfo &FromHFI = getFileInfo(CurFileEnt);
530 unsigned DirInfo = FromHFI.DirInfo;
531 bool IndexHeaderMapHeader = FromHFI.IndexHeaderMapHeader;
532 StringRef Framework = FromHFI.Framework;
534 HeaderFileInfo &ToHFI = getFileInfo(FE);
535 ToHFI.DirInfo = DirInfo;
536 ToHFI.IndexHeaderMapHeader = IndexHeaderMapHeader;
537 ToHFI.Framework = Framework;
539 if (SearchPath != NULL) {
540 StringRef SearchPathRef(CurFileEnt->getDir()->getName());
542 SearchPath->append(SearchPathRef.begin(), SearchPathRef.end());
544 if (RelativePath != NULL) {
545 RelativePath->clear();
546 RelativePath->append(Filename.begin(), Filename.end());
554 // If this is a system #include, ignore the user #include locs.
555 unsigned i = isAngled ? AngledDirIdx : 0;
557 // If this is a #include_next request, start searching after the directory the
558 // file was found in.
560 i = FromDir-&SearchDirs[0];
562 // Cache all of the lookups performed by this method. Many headers are
563 // multiply included, and the "pragma once" optimization prevents them from
564 // being relex/pp'd, but they would still have to search through a
565 // (potentially huge) series of SearchDirs to find it.
566 std::pair<unsigned, unsigned> &CacheLookup =
567 LookupFileCache.GetOrCreateValue(Filename).getValue();
569 // If the entry has been previously looked up, the first value will be
570 // non-zero. If the value is equal to i (the start point of our search), then
571 // this is a matching hit.
572 if (!SkipCache && CacheLookup.first == i+1) {
573 // Skip querying potentially lots of directories for this lookup.
574 i = CacheLookup.second;
576 // Otherwise, this is the first query, or the previous query didn't match
577 // our search start. We will fill in our found location below, so prime the
578 // start point value.
579 CacheLookup.first = i+1;
582 // Check each directory in sequence to see if it contains this file.
583 for (; i != SearchDirs.size(); ++i) {
584 bool InUserSpecifiedSystemFramework = false;
585 const FileEntry *FE =
586 SearchDirs[i].LookupFile(Filename, *this, SearchPath, RelativePath,
587 SuggestedModule, InUserSpecifiedSystemFramework);
590 CurDir = &SearchDirs[i];
592 // This file is a system header or C++ unfriendly if the dir is.
593 HeaderFileInfo &HFI = getFileInfo(FE);
594 HFI.DirInfo = CurDir->getDirCharacteristic();
596 // If the directory characteristic is User but this framework was
597 // user-specified to be treated as a system framework, promote the
599 if (HFI.DirInfo == SrcMgr::C_User && InUserSpecifiedSystemFramework)
600 HFI.DirInfo = SrcMgr::C_System;
602 // If the filename matches a known system header prefix, override
603 // whether the file is a system header.
604 for (unsigned j = SystemHeaderPrefixes.size(); j; --j) {
605 if (Filename.startswith(SystemHeaderPrefixes[j-1].first)) {
606 HFI.DirInfo = SystemHeaderPrefixes[j-1].second ? SrcMgr::C_System
612 // If this file is found in a header map and uses the framework style of
613 // includes, then this header is part of a framework we're building.
614 if (CurDir->isIndexHeaderMap()) {
615 size_t SlashPos = Filename.find('/');
616 if (SlashPos != StringRef::npos) {
617 HFI.IndexHeaderMapHeader = 1;
618 HFI.Framework = getUniqueFrameworkName(StringRef(Filename.begin(),
623 // Remember this location for the next lookup we do.
624 CacheLookup.second = i;
628 // If we are including a file with a quoted include "foo.h" from inside
629 // a header in a framework that is currently being built, and we couldn't
630 // resolve "foo.h" any other way, change the include to <Foo/foo.h>, where
631 // "Foo" is the name of the framework in which the including header was found.
632 if (CurFileEnt && !isAngled && Filename.find('/') == StringRef::npos) {
633 HeaderFileInfo &IncludingHFI = getFileInfo(CurFileEnt);
634 if (IncludingHFI.IndexHeaderMapHeader) {
635 SmallString<128> ScratchFilename;
636 ScratchFilename += IncludingHFI.Framework;
637 ScratchFilename += '/';
638 ScratchFilename += Filename;
640 const FileEntry *Result = LookupFile(ScratchFilename, /*isAngled=*/true,
641 FromDir, CurDir, CurFileEnt,
642 SearchPath, RelativePath,
644 std::pair<unsigned, unsigned> &CacheLookup
645 = LookupFileCache.GetOrCreateValue(Filename).getValue();
647 = LookupFileCache.GetOrCreateValue(ScratchFilename).getValue().second;
652 // Otherwise, didn't find it. Remember we didn't find this.
653 CacheLookup.second = SearchDirs.size();
657 /// LookupSubframeworkHeader - Look up a subframework for the specified
658 /// \#include file. For example, if \#include'ing <HIToolbox/HIToolbox.h> from
659 /// within ".../Carbon.framework/Headers/Carbon.h", check to see if HIToolbox
660 /// is a subframework within Carbon.framework. If so, return the FileEntry
661 /// for the designated file, otherwise return null.
662 const FileEntry *HeaderSearch::
663 LookupSubframeworkHeader(StringRef Filename,
664 const FileEntry *ContextFileEnt,
665 SmallVectorImpl<char> *SearchPath,
666 SmallVectorImpl<char> *RelativePath) {
667 assert(ContextFileEnt && "No context file?");
669 // Framework names must have a '/' in the filename. Find it.
670 // FIXME: Should we permit '\' on Windows?
671 size_t SlashPos = Filename.find('/');
672 if (SlashPos == StringRef::npos) return 0;
674 // Look up the base framework name of the ContextFileEnt.
675 const char *ContextName = ContextFileEnt->getName();
677 // If the context info wasn't a framework, couldn't be a subframework.
678 const unsigned DotFrameworkLen = 10;
679 const char *FrameworkPos = strstr(ContextName, ".framework");
680 if (FrameworkPos == 0 ||
681 (FrameworkPos[DotFrameworkLen] != '/' &&
682 FrameworkPos[DotFrameworkLen] != '\\'))
685 SmallString<1024> FrameworkName(ContextName, FrameworkPos+DotFrameworkLen+1);
687 // Append Frameworks/HIToolbox.framework/
688 FrameworkName += "Frameworks/";
689 FrameworkName.append(Filename.begin(), Filename.begin()+SlashPos);
690 FrameworkName += ".framework/";
692 llvm::StringMapEntry<FrameworkCacheEntry> &CacheLookup =
693 FrameworkMap.GetOrCreateValue(Filename.substr(0, SlashPos));
695 // Some other location?
696 if (CacheLookup.getValue().Directory &&
697 CacheLookup.getKeyLength() == FrameworkName.size() &&
698 memcmp(CacheLookup.getKeyData(), &FrameworkName[0],
699 CacheLookup.getKeyLength()) != 0)
702 // Cache subframework.
703 if (CacheLookup.getValue().Directory == 0) {
704 ++NumSubFrameworkLookups;
706 // If the framework dir doesn't exist, we fail.
707 const DirectoryEntry *Dir = FileMgr.getDirectory(FrameworkName.str());
708 if (Dir == 0) return 0;
710 // Otherwise, if it does, remember that this is the right direntry for this
712 CacheLookup.getValue().Directory = Dir;
715 const FileEntry *FE = 0;
717 if (RelativePath != NULL) {
718 RelativePath->clear();
719 RelativePath->append(Filename.begin()+SlashPos+1, Filename.end());
722 // Check ".../Frameworks/HIToolbox.framework/Headers/HIToolbox.h"
723 SmallString<1024> HeadersFilename(FrameworkName);
724 HeadersFilename += "Headers/";
725 if (SearchPath != NULL) {
727 // Without trailing '/'.
728 SearchPath->append(HeadersFilename.begin(), HeadersFilename.end()-1);
731 HeadersFilename.append(Filename.begin()+SlashPos+1, Filename.end());
732 if (!(FE = FileMgr.getFile(HeadersFilename.str(), /*openFile=*/true))) {
734 // Check ".../Frameworks/HIToolbox.framework/PrivateHeaders/HIToolbox.h"
735 HeadersFilename = FrameworkName;
736 HeadersFilename += "PrivateHeaders/";
737 if (SearchPath != NULL) {
739 // Without trailing '/'.
740 SearchPath->append(HeadersFilename.begin(), HeadersFilename.end()-1);
743 HeadersFilename.append(Filename.begin()+SlashPos+1, Filename.end());
744 if (!(FE = FileMgr.getFile(HeadersFilename.str(), /*openFile=*/true)))
748 // This file is a system header or C++ unfriendly if the old file is.
750 // Note that the temporary 'DirInfo' is required here, as either call to
751 // getFileInfo could resize the vector and we don't want to rely on order
753 unsigned DirInfo = getFileInfo(ContextFileEnt).DirInfo;
754 getFileInfo(FE).DirInfo = DirInfo;
758 /// \brief Helper static function to normalize a path for injection into
759 /// a synthetic header.
760 /*static*/ std::string
761 HeaderSearch::NormalizeDashIncludePath(StringRef File, FileManager &FileMgr) {
762 // Implicit include paths should be resolved relative to the current
763 // working directory first, and then use the regular header search
764 // mechanism. The proper way to handle this is to have the
765 // predefines buffer located at the current working directory, but
766 // it has no file entry. For now, workaround this by using an
767 // absolute path if we find the file here, and otherwise letting
768 // header search handle it.
769 SmallString<128> Path(File);
770 llvm::sys::fs::make_absolute(Path);
772 if (llvm::sys::fs::exists(Path.str(), exists) || !exists)
775 FileMgr.getFile(File);
777 return Lexer::Stringify(Path.str());
780 //===----------------------------------------------------------------------===//
781 // File Info Management.
782 //===----------------------------------------------------------------------===//
784 /// \brief Merge the header file info provided by \p OtherHFI into the current
785 /// header file info (\p HFI)
786 static void mergeHeaderFileInfo(HeaderFileInfo &HFI,
787 const HeaderFileInfo &OtherHFI) {
788 HFI.isImport |= OtherHFI.isImport;
789 HFI.isPragmaOnce |= OtherHFI.isPragmaOnce;
790 HFI.NumIncludes += OtherHFI.NumIncludes;
792 if (!HFI.ControllingMacro && !HFI.ControllingMacroID) {
793 HFI.ControllingMacro = OtherHFI.ControllingMacro;
794 HFI.ControllingMacroID = OtherHFI.ControllingMacroID;
797 if (OtherHFI.External) {
798 HFI.DirInfo = OtherHFI.DirInfo;
799 HFI.External = OtherHFI.External;
800 HFI.IndexHeaderMapHeader = OtherHFI.IndexHeaderMapHeader;
803 if (HFI.Framework.empty())
804 HFI.Framework = OtherHFI.Framework;
809 /// getFileInfo - Return the HeaderFileInfo structure for the specified
811 HeaderFileInfo &HeaderSearch::getFileInfo(const FileEntry *FE) {
812 if (FE->getUID() >= FileInfo.size())
813 FileInfo.resize(FE->getUID()+1);
815 HeaderFileInfo &HFI = FileInfo[FE->getUID()];
816 if (ExternalSource && !HFI.Resolved)
817 mergeHeaderFileInfo(HFI, ExternalSource->GetHeaderFileInfo(FE));
821 bool HeaderSearch::isFileMultipleIncludeGuarded(const FileEntry *File) {
822 // Check if we've ever seen this file as a header.
823 if (File->getUID() >= FileInfo.size())
826 // Resolve header file info from the external source, if needed.
827 HeaderFileInfo &HFI = FileInfo[File->getUID()];
828 if (ExternalSource && !HFI.Resolved)
829 mergeHeaderFileInfo(HFI, ExternalSource->GetHeaderFileInfo(File));
831 return HFI.isPragmaOnce || HFI.isImport ||
832 HFI.ControllingMacro || HFI.ControllingMacroID;
835 void HeaderSearch::setHeaderFileInfoForUID(HeaderFileInfo HFI, unsigned UID) {
836 if (UID >= FileInfo.size())
837 FileInfo.resize(UID+1);
842 bool HeaderSearch::ShouldEnterIncludeFile(const FileEntry *File, bool isImport){
843 ++NumIncluded; // Count # of attempted #includes.
845 // Get information about this file.
846 HeaderFileInfo &FileInfo = getFileInfo(File);
848 // If this is a #import directive, check that we have not already imported
851 // If this has already been imported, don't import it again.
852 FileInfo.isImport = true;
854 // Has this already been #import'ed or #include'd?
855 if (FileInfo.NumIncludes) return false;
857 // Otherwise, if this is a #include of a file that was previously #import'd
858 // or if this is the second #include of a #pragma once file, ignore it.
859 if (FileInfo.isImport)
863 // Next, check to see if the file is wrapped with #ifndef guards. If so, and
864 // if the macro that guards it is defined, we know the #include has no effect.
865 if (const IdentifierInfo *ControllingMacro
866 = FileInfo.getControllingMacro(ExternalLookup))
867 if (ControllingMacro->hasMacroDefinition()) {
868 ++NumMultiIncludeFileOptzn;
872 // Increment the number of times this file has been included.
873 ++FileInfo.NumIncludes;
878 size_t HeaderSearch::getTotalMemory() const {
879 return SearchDirs.capacity()
880 + llvm::capacity_in_bytes(FileInfo)
881 + llvm::capacity_in_bytes(HeaderMaps)
882 + LookupFileCache.getAllocator().getTotalMemory()
883 + FrameworkMap.getAllocator().getTotalMemory();
886 StringRef HeaderSearch::getUniqueFrameworkName(StringRef Framework) {
887 return FrameworkNames.GetOrCreateValue(Framework).getKey();
890 bool HeaderSearch::hasModuleMap(StringRef FileName,
891 const DirectoryEntry *Root) {
892 llvm::SmallVector<const DirectoryEntry *, 2> FixUpDirectories;
894 StringRef DirName = FileName;
896 // Get the parent directory name.
897 DirName = llvm::sys::path::parent_path(DirName);
901 // Determine whether this directory exists.
902 const DirectoryEntry *Dir = FileMgr.getDirectory(DirName);
906 // Try to load the module map file in this directory.
907 switch (loadModuleMapFile(Dir)) {
908 case LMM_NewlyLoaded:
909 case LMM_AlreadyLoaded:
910 // Success. All of the directories we stepped through inherit this module
912 for (unsigned I = 0, N = FixUpDirectories.size(); I != N; ++I)
913 DirectoryHasModuleMap[FixUpDirectories[I]] = true;
917 case LMM_NoDirectory:
918 case LMM_InvalidModuleMap:
922 // If we hit the top of our search, we're done.
926 // Keep track of all of the directories we checked, so we can mark them as
927 // having module maps if we eventually do find a module map.
928 FixUpDirectories.push_back(Dir);
932 Module *HeaderSearch::findModuleForHeader(const FileEntry *File) {
933 if (Module *Mod = ModMap.findModuleForHeader(File))
939 bool HeaderSearch::loadModuleMapFile(const FileEntry *File) {
940 const DirectoryEntry *Dir = File->getDir();
942 llvm::DenseMap<const DirectoryEntry *, bool>::iterator KnownDir
943 = DirectoryHasModuleMap.find(Dir);
944 if (KnownDir != DirectoryHasModuleMap.end())
945 return !KnownDir->second;
947 bool Result = ModMap.parseModuleMapFile(File);
948 if (!Result && llvm::sys::path::filename(File->getName()) == "module.map") {
949 // If the file we loaded was a module.map, look for the corresponding
950 // module_private.map.
951 SmallString<128> PrivateFilename(Dir->getName());
952 llvm::sys::path::append(PrivateFilename, "module_private.map");
953 if (const FileEntry *PrivateFile = FileMgr.getFile(PrivateFilename))
954 Result = ModMap.parseModuleMapFile(PrivateFile);
957 DirectoryHasModuleMap[Dir] = !Result;
961 Module *HeaderSearch::loadFrameworkModule(StringRef Name,
962 const DirectoryEntry *Dir,
964 if (Module *Module = ModMap.findModule(Name))
967 // Try to load a module map file.
968 switch (loadModuleMapFile(Dir)) {
969 case LMM_InvalidModuleMap:
972 case LMM_AlreadyLoaded:
973 case LMM_NoDirectory:
976 case LMM_NewlyLoaded:
977 return ModMap.findModule(Name);
980 // Figure out the top-level framework directory and the submodule path from
981 // that top-level framework to the requested framework.
982 llvm::SmallVector<std::string, 2> SubmodulePath;
983 SubmodulePath.push_back(Name);
984 const DirectoryEntry *TopFrameworkDir
985 = ::getTopFrameworkDir(FileMgr, Dir->getName(), SubmodulePath);
988 // Try to infer a module map from the top-level framework directory.
989 Module *Result = ModMap.inferFrameworkModule(SubmodulePath.back(),
996 // Follow the submodule path to find the requested (sub)framework module
997 // within the top-level framework module.
998 SubmodulePath.pop_back();
999 while (!SubmodulePath.empty() && Result) {
1000 Result = ModMap.lookupModuleQualified(SubmodulePath.back(), Result);
1001 SubmodulePath.pop_back();
1007 HeaderSearch::LoadModuleMapResult
1008 HeaderSearch::loadModuleMapFile(StringRef DirName) {
1009 if (const DirectoryEntry *Dir = FileMgr.getDirectory(DirName))
1010 return loadModuleMapFile(Dir);
1012 return LMM_NoDirectory;
1015 HeaderSearch::LoadModuleMapResult
1016 HeaderSearch::loadModuleMapFile(const DirectoryEntry *Dir) {
1017 llvm::DenseMap<const DirectoryEntry *, bool>::iterator KnownDir
1018 = DirectoryHasModuleMap.find(Dir);
1019 if (KnownDir != DirectoryHasModuleMap.end())
1020 return KnownDir->second? LMM_AlreadyLoaded : LMM_InvalidModuleMap;
1022 SmallString<128> ModuleMapFileName;
1023 ModuleMapFileName += Dir->getName();
1024 unsigned ModuleMapDirNameLen = ModuleMapFileName.size();
1025 llvm::sys::path::append(ModuleMapFileName, "module.map");
1026 if (const FileEntry *ModuleMapFile = FileMgr.getFile(ModuleMapFileName)) {
1027 // We have found a module map file. Try to parse it.
1028 if (ModMap.parseModuleMapFile(ModuleMapFile)) {
1029 // No suitable module map.
1030 DirectoryHasModuleMap[Dir] = false;
1031 return LMM_InvalidModuleMap;
1034 // This directory has a module map.
1035 DirectoryHasModuleMap[Dir] = true;
1037 // Check whether there is a private module map that we need to load as well.
1038 ModuleMapFileName.erase(ModuleMapFileName.begin() + ModuleMapDirNameLen,
1039 ModuleMapFileName.end());
1040 llvm::sys::path::append(ModuleMapFileName, "module_private.map");
1041 if (const FileEntry *PrivateModuleMapFile
1042 = FileMgr.getFile(ModuleMapFileName)) {
1043 if (ModMap.parseModuleMapFile(PrivateModuleMapFile)) {
1044 // No suitable module map.
1045 DirectoryHasModuleMap[Dir] = false;
1046 return LMM_InvalidModuleMap;
1050 return LMM_NewlyLoaded;
1053 // No suitable module map.
1054 DirectoryHasModuleMap[Dir] = false;
1055 return LMM_InvalidModuleMap;
1058 void HeaderSearch::collectAllModules(llvm::SmallVectorImpl<Module *> &Modules) {
1061 // Load module maps for each of the header search directories.
1062 for (unsigned Idx = 0, N = SearchDirs.size(); Idx != N; ++Idx) {
1063 if (SearchDirs[Idx].isFramework()) {
1064 llvm::error_code EC;
1065 SmallString<128> DirNative;
1066 llvm::sys::path::native(SearchDirs[Idx].getFrameworkDir()->getName(),
1069 // Search each of the ".framework" directories to load them as modules.
1070 bool IsSystem = SearchDirs[Idx].getDirCharacteristic() != SrcMgr::C_User;
1071 for (llvm::sys::fs::directory_iterator Dir(DirNative.str(), EC), DirEnd;
1072 Dir != DirEnd && !EC; Dir.increment(EC)) {
1073 if (llvm::sys::path::extension(Dir->path()) != ".framework")
1076 const DirectoryEntry *FrameworkDir = FileMgr.getDirectory(Dir->path());
1080 // Load this framework module.
1081 loadFrameworkModule(llvm::sys::path::stem(Dir->path()), FrameworkDir,
1087 // FIXME: Deal with header maps.
1088 if (SearchDirs[Idx].isHeaderMap())
1091 // Try to load a module map file for the search directory.
1092 loadModuleMapFile(SearchDirs[Idx].getDir());
1094 // Try to load module map files for immediate subdirectories of this search
1096 llvm::error_code EC;
1097 SmallString<128> DirNative;
1098 llvm::sys::path::native(SearchDirs[Idx].getDir()->getName(), DirNative);
1099 for (llvm::sys::fs::directory_iterator Dir(DirNative.str(), EC), DirEnd;
1100 Dir != DirEnd && !EC; Dir.increment(EC)) {
1101 loadModuleMapFile(Dir->path());
1105 // Populate the list of modules.
1106 for (ModuleMap::module_iterator M = ModMap.module_begin(),
1107 MEnd = ModMap.module_end();
1109 Modules.push_back(M->getValue());