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 #if defined(LLVM_ON_UNIX)
29 using namespace clang;
31 const IdentifierInfo *
32 HeaderFileInfo::getControllingMacro(ExternalIdentifierLookup *External) {
34 return ControllingMacro;
36 if (!ControllingMacroID || !External)
39 ControllingMacro = External->GetIdentifier(ControllingMacroID);
40 return ControllingMacro;
43 ExternalHeaderFileInfoSource::~ExternalHeaderFileInfoSource() {}
45 HeaderSearch::HeaderSearch(IntrusiveRefCntPtr<HeaderSearchOptions> HSOpts,
46 FileManager &FM, DiagnosticsEngine &Diags,
47 const LangOptions &LangOpts,
48 const TargetInfo *Target)
49 : HSOpts(HSOpts), FileMgr(FM), FrameworkMap(64),
50 ModMap(FileMgr, *Diags.getClient(), LangOpts, Target, *this)
54 NoCurDirSearch = false;
59 NumMultiIncludeFileOptzn = 0;
60 NumFrameworkLookups = NumSubFrameworkLookups = 0;
63 HeaderSearch::~HeaderSearch() {
65 for (unsigned i = 0, e = HeaderMaps.size(); i != e; ++i)
66 delete HeaderMaps[i].second;
69 void HeaderSearch::PrintStats() {
70 fprintf(stderr, "\n*** HeaderSearch Stats:\n");
71 fprintf(stderr, "%d files tracked.\n", (int)FileInfo.size());
72 unsigned NumOnceOnlyFiles = 0, MaxNumIncludes = 0, NumSingleIncludedFiles = 0;
73 for (unsigned i = 0, e = FileInfo.size(); i != e; ++i) {
74 NumOnceOnlyFiles += FileInfo[i].isImport;
75 if (MaxNumIncludes < FileInfo[i].NumIncludes)
76 MaxNumIncludes = FileInfo[i].NumIncludes;
77 NumSingleIncludedFiles += FileInfo[i].NumIncludes == 1;
79 fprintf(stderr, " %d #import/#pragma once files.\n", NumOnceOnlyFiles);
80 fprintf(stderr, " %d included exactly once.\n", NumSingleIncludedFiles);
81 fprintf(stderr, " %d max times a file is included.\n", MaxNumIncludes);
83 fprintf(stderr, " %d #include/#include_next/#import.\n", NumIncluded);
84 fprintf(stderr, " %d #includes skipped due to"
85 " the multi-include optimization.\n", NumMultiIncludeFileOptzn);
87 fprintf(stderr, "%d framework lookups.\n", NumFrameworkLookups);
88 fprintf(stderr, "%d subframework lookups.\n", NumSubFrameworkLookups);
91 /// CreateHeaderMap - This method returns a HeaderMap for the specified
92 /// FileEntry, uniquing them through the 'HeaderMaps' datastructure.
93 const HeaderMap *HeaderSearch::CreateHeaderMap(const FileEntry *FE) {
94 // We expect the number of headermaps to be small, and almost always empty.
95 // If it ever grows, use of a linear search should be re-evaluated.
96 if (!HeaderMaps.empty()) {
97 for (unsigned i = 0, e = HeaderMaps.size(); i != e; ++i)
98 // Pointer equality comparison of FileEntries works because they are
99 // already uniqued by inode.
100 if (HeaderMaps[i].first == FE)
101 return HeaderMaps[i].second;
104 if (const HeaderMap *HM = HeaderMap::Create(FE, FileMgr)) {
105 HeaderMaps.push_back(std::make_pair(FE, HM));
112 std::string HeaderSearch::getModuleFileName(Module *Module) {
113 // If we don't have a module cache path, we can't do anything.
114 if (ModuleCachePath.empty())
115 return std::string();
118 SmallString<256> Result(ModuleCachePath);
119 llvm::sys::path::append(Result, Module->getTopLevelModule()->Name + ".pcm");
120 return Result.str().str();
123 std::string HeaderSearch::getModuleFileName(StringRef ModuleName) {
124 // If we don't have a module cache path, we can't do anything.
125 if (ModuleCachePath.empty())
126 return std::string();
129 SmallString<256> Result(ModuleCachePath);
130 llvm::sys::path::append(Result, ModuleName + ".pcm");
131 return Result.str().str();
134 Module *HeaderSearch::lookupModule(StringRef ModuleName, bool AllowSearch) {
135 // Look in the module map to determine if there is a module by this name.
136 Module *Module = ModMap.findModule(ModuleName);
137 if (Module || !AllowSearch)
140 // Look through the various header search paths to load any available module
141 // maps, searching for a module map that describes this module.
142 for (unsigned Idx = 0, N = SearchDirs.size(); Idx != N; ++Idx) {
143 if (SearchDirs[Idx].isFramework()) {
144 // Search for or infer a module map for a framework.
145 SmallString<128> FrameworkDirName;
146 FrameworkDirName += SearchDirs[Idx].getFrameworkDir()->getName();
147 llvm::sys::path::append(FrameworkDirName, ModuleName + ".framework");
148 if (const DirectoryEntry *FrameworkDir
149 = FileMgr.getDirectory(FrameworkDirName)) {
151 = SearchDirs[Idx].getDirCharacteristic() != SrcMgr::C_User;
152 Module = loadFrameworkModule(ModuleName, FrameworkDir, IsSystem);
158 // FIXME: Figure out how header maps and module maps will work together.
160 // Only deal with normal search directories.
161 if (!SearchDirs[Idx].isNormalDir())
164 // Search for a module map file in this directory.
165 if (loadModuleMapFile(SearchDirs[Idx].getDir()) == LMM_NewlyLoaded) {
166 // We just loaded a module map file; check whether the module is
168 Module = ModMap.findModule(ModuleName);
173 // Search for a module map in a subdirectory with the same name as the
175 SmallString<128> NestedModuleMapDirName;
176 NestedModuleMapDirName = SearchDirs[Idx].getDir()->getName();
177 llvm::sys::path::append(NestedModuleMapDirName, ModuleName);
178 if (loadModuleMapFile(NestedModuleMapDirName) == LMM_NewlyLoaded) {
179 // If we just loaded a module map file, look for the module again.
180 Module = ModMap.findModule(ModuleName);
189 //===----------------------------------------------------------------------===//
190 // File lookup within a DirectoryLookup scope
191 //===----------------------------------------------------------------------===//
193 /// getName - Return the directory or filename corresponding to this lookup
195 const char *DirectoryLookup::getName() const {
197 return getDir()->getName();
199 return getFrameworkDir()->getName();
200 assert(isHeaderMap() && "Unknown DirectoryLookup");
201 return getHeaderMap()->getFileName();
205 /// LookupFile - Lookup the specified file in this search path, returning it
206 /// if it exists or returning null if not.
207 const FileEntry *DirectoryLookup::LookupFile(
210 SmallVectorImpl<char> *SearchPath,
211 SmallVectorImpl<char> *RelativePath,
212 Module **SuggestedModule,
213 bool &InUserSpecifiedSystemFramework) const {
214 InUserSpecifiedSystemFramework = false;
216 SmallString<1024> TmpDir;
218 // Concatenate the requested file onto the directory.
219 TmpDir = getDir()->getName();
220 llvm::sys::path::append(TmpDir, Filename);
221 if (SearchPath != NULL) {
222 StringRef SearchPathRef(getDir()->getName());
224 SearchPath->append(SearchPathRef.begin(), SearchPathRef.end());
226 if (RelativePath != NULL) {
227 RelativePath->clear();
228 RelativePath->append(Filename.begin(), Filename.end());
231 // If we have a module map that might map this header, load it and
232 // check whether we'll have a suggestion for a module.
233 if (SuggestedModule && HS.hasModuleMap(TmpDir, getDir())) {
234 const FileEntry *File = HS.getFileMgr().getFile(TmpDir.str(),
239 // If there is a module that corresponds to this header,
241 *SuggestedModule = HS.findModuleForHeader(File);
245 return HS.getFileMgr().getFile(TmpDir.str(), /*openFile=*/true);
249 return DoFrameworkLookup(Filename, HS, SearchPath, RelativePath,
250 SuggestedModule, InUserSpecifiedSystemFramework);
252 assert(isHeaderMap() && "Unknown directory lookup");
253 const FileEntry * const Result = getHeaderMap()->LookupFile(
254 Filename, HS.getFileMgr());
256 if (SearchPath != NULL) {
257 StringRef SearchPathRef(getName());
259 SearchPath->append(SearchPathRef.begin(), SearchPathRef.end());
261 if (RelativePath != NULL) {
262 RelativePath->clear();
263 RelativePath->append(Filename.begin(), Filename.end());
269 /// \brief Given a framework directory, find the top-most framework directory.
271 /// \param FileMgr The file manager to use for directory lookups.
272 /// \param DirName The name of the framework directory.
273 /// \param SubmodulePath Will be populated with the submodule path from the
274 /// returned top-level module to the originally named framework.
275 static const DirectoryEntry *
276 getTopFrameworkDir(FileManager &FileMgr, StringRef DirName,
277 SmallVectorImpl<std::string> &SubmodulePath) {
278 assert(llvm::sys::path::extension(DirName) == ".framework" &&
279 "Not a framework directory");
281 // Note: as an egregious but useful hack we use the real path here, because
282 // frameworks moving between top-level frameworks to embedded frameworks tend
283 // to be symlinked, and we base the logical structure of modules on the
284 // physical layout. In particular, we need to deal with crazy includes like
286 // #include <Foo/Frameworks/Bar.framework/Headers/Wibble.h>
288 // where 'Bar' used to be embedded in 'Foo', is now a top-level framework
289 // which one should access with, e.g.,
291 // #include <Bar/Wibble.h>
293 // Similar issues occur when a top-level framework has moved into an
294 // embedded framework.
295 const DirectoryEntry *TopFrameworkDir = FileMgr.getDirectory(DirName);
296 DirName = FileMgr.getCanonicalName(TopFrameworkDir);
298 // Get the parent directory name.
299 DirName = llvm::sys::path::parent_path(DirName);
303 // Determine whether this directory exists.
304 const DirectoryEntry *Dir = FileMgr.getDirectory(DirName);
308 // If this is a framework directory, then we're a subframework of this
310 if (llvm::sys::path::extension(DirName) == ".framework") {
311 SubmodulePath.push_back(llvm::sys::path::stem(DirName));
312 TopFrameworkDir = Dir;
316 return TopFrameworkDir;
319 /// DoFrameworkLookup - Do a lookup of the specified file in the current
320 /// DirectoryLookup, which is a framework directory.
321 const FileEntry *DirectoryLookup::DoFrameworkLookup(
324 SmallVectorImpl<char> *SearchPath,
325 SmallVectorImpl<char> *RelativePath,
326 Module **SuggestedModule,
327 bool &InUserSpecifiedSystemFramework) const
329 FileManager &FileMgr = HS.getFileMgr();
331 // Framework names must have a '/' in the filename.
332 size_t SlashPos = Filename.find('/');
333 if (SlashPos == StringRef::npos) return 0;
335 // Find out if this is the home for the specified framework, by checking
336 // HeaderSearch. Possible answers are yes/no and unknown.
337 HeaderSearch::FrameworkCacheEntry &CacheEntry =
338 HS.LookupFrameworkCache(Filename.substr(0, SlashPos));
340 // If it is known and in some other directory, fail.
341 if (CacheEntry.Directory && CacheEntry.Directory != getFrameworkDir())
344 // Otherwise, construct the path to this framework dir.
346 // FrameworkName = "/System/Library/Frameworks/"
347 SmallString<1024> FrameworkName;
348 FrameworkName += getFrameworkDir()->getName();
349 if (FrameworkName.empty() || FrameworkName.back() != '/')
350 FrameworkName.push_back('/');
352 // FrameworkName = "/System/Library/Frameworks/Cocoa"
353 StringRef ModuleName(Filename.begin(), SlashPos);
354 FrameworkName += ModuleName;
356 // FrameworkName = "/System/Library/Frameworks/Cocoa.framework/"
357 FrameworkName += ".framework/";
359 // If the cache entry was unresolved, populate it now.
360 if (CacheEntry.Directory == 0) {
361 HS.IncrementFrameworkLookupCount();
363 // If the framework dir doesn't exist, we fail.
364 const DirectoryEntry *Dir = FileMgr.getDirectory(FrameworkName.str());
365 if (Dir == 0) return 0;
367 // Otherwise, if it does, remember that this is the right direntry for this
369 CacheEntry.Directory = getFrameworkDir();
371 // If this is a user search directory, check if the framework has been
372 // user-specified as a system framework.
373 if (getDirCharacteristic() == SrcMgr::C_User) {
374 SmallString<1024> SystemFrameworkMarker(FrameworkName);
375 SystemFrameworkMarker += ".system_framework";
376 if (llvm::sys::fs::exists(SystemFrameworkMarker.str())) {
377 CacheEntry.IsUserSpecifiedSystemFramework = true;
382 // Set the 'user-specified system framework' flag.
383 InUserSpecifiedSystemFramework = CacheEntry.IsUserSpecifiedSystemFramework;
385 if (RelativePath != NULL) {
386 RelativePath->clear();
387 RelativePath->append(Filename.begin()+SlashPos+1, Filename.end());
390 // Check "/System/Library/Frameworks/Cocoa.framework/Headers/file.h"
391 unsigned OrigSize = FrameworkName.size();
393 FrameworkName += "Headers/";
395 if (SearchPath != NULL) {
397 // Without trailing '/'.
398 SearchPath->append(FrameworkName.begin(), FrameworkName.end()-1);
401 FrameworkName.append(Filename.begin()+SlashPos+1, Filename.end());
402 const FileEntry *FE = FileMgr.getFile(FrameworkName.str(),
403 /*openFile=*/!SuggestedModule);
405 // Check "/System/Library/Frameworks/Cocoa.framework/PrivateHeaders/file.h"
406 const char *Private = "Private";
407 FrameworkName.insert(FrameworkName.begin()+OrigSize, Private,
408 Private+strlen(Private));
409 if (SearchPath != NULL)
410 SearchPath->insert(SearchPath->begin()+OrigSize, Private,
411 Private+strlen(Private));
413 FE = FileMgr.getFile(FrameworkName.str(), /*openFile=*/!SuggestedModule);
416 // If we found the header and are allowed to suggest a module, do so now.
417 if (FE && SuggestedModule) {
418 // Find the framework in which this header occurs.
419 StringRef FrameworkPath = FE->getName();
420 bool FoundFramework = false;
422 // Get the parent directory name.
423 FrameworkPath = llvm::sys::path::parent_path(FrameworkPath);
424 if (FrameworkPath.empty())
427 // Determine whether this directory exists.
428 const DirectoryEntry *Dir = FileMgr.getDirectory(FrameworkPath);
432 // If this is a framework directory, then we're a subframework of this
434 if (llvm::sys::path::extension(FrameworkPath) == ".framework") {
435 FoundFramework = true;
440 if (FoundFramework) {
441 // Find the top-level framework based on this framework.
442 SmallVector<std::string, 4> SubmodulePath;
443 const DirectoryEntry *TopFrameworkDir
444 = ::getTopFrameworkDir(FileMgr, FrameworkPath, SubmodulePath);
446 // Determine the name of the top-level framework.
447 StringRef ModuleName = llvm::sys::path::stem(TopFrameworkDir->getName());
449 // Load this framework module. If that succeeds, find the suggested module
450 // for this header, if any.
451 bool IsSystem = getDirCharacteristic() != SrcMgr::C_User;
452 if (HS.loadFrameworkModule(ModuleName, TopFrameworkDir, IsSystem)) {
453 *SuggestedModule = HS.findModuleForHeader(FE);
456 *SuggestedModule = HS.findModuleForHeader(FE);
462 void HeaderSearch::setTarget(const TargetInfo &Target) {
463 ModMap.setTarget(Target);
467 //===----------------------------------------------------------------------===//
468 // Header File Location.
469 //===----------------------------------------------------------------------===//
472 /// LookupFile - Given a "foo" or \<foo> reference, look up the indicated file,
473 /// return null on failure. isAngled indicates whether the file reference is
474 /// for system \#include's or not (i.e. using <> instead of ""). CurFileEnt, if
475 /// non-null, indicates where the \#including file is, in case a relative search
477 const FileEntry *HeaderSearch::LookupFile(
480 const DirectoryLookup *FromDir,
481 const DirectoryLookup *&CurDir,
482 const FileEntry *CurFileEnt,
483 SmallVectorImpl<char> *SearchPath,
484 SmallVectorImpl<char> *RelativePath,
485 Module **SuggestedModule,
489 *SuggestedModule = 0;
491 // If 'Filename' is absolute, check to see if it exists and no searching.
492 if (llvm::sys::path::is_absolute(Filename)) {
495 // If this was an #include_next "/absolute/file", fail.
496 if (FromDir) return 0;
498 if (SearchPath != NULL)
500 if (RelativePath != NULL) {
501 RelativePath->clear();
502 RelativePath->append(Filename.begin(), Filename.end());
504 // Otherwise, just return the file.
505 return FileMgr.getFile(Filename, /*openFile=*/true);
508 // Unless disabled, check to see if the file is in the #includer's
509 // directory. This has to be based on CurFileEnt, not CurDir, because
510 // CurFileEnt could be a #include of a subdirectory (#include "foo/bar.h") and
511 // a subsequent include of "baz.h" should resolve to "whatever/foo/baz.h".
512 // This search is not done for <> headers.
513 if (CurFileEnt && !isAngled && !NoCurDirSearch) {
514 SmallString<1024> TmpDir;
515 // Concatenate the requested file onto the directory.
516 // FIXME: Portability. Filename concatenation should be in sys::Path.
517 TmpDir += CurFileEnt->getDir()->getName();
518 TmpDir.push_back('/');
519 TmpDir.append(Filename.begin(), Filename.end());
520 if (const FileEntry *FE = FileMgr.getFile(TmpDir.str(),/*openFile=*/true)) {
521 // Leave CurDir unset.
522 // This file is a system header or C++ unfriendly if the old file is.
524 // Note that we only use one of FromHFI/ToHFI at once, due to potential
525 // reallocation of the underlying vector potentially making the first
526 // reference binding dangling.
527 HeaderFileInfo &FromHFI = getFileInfo(CurFileEnt);
528 unsigned DirInfo = FromHFI.DirInfo;
529 bool IndexHeaderMapHeader = FromHFI.IndexHeaderMapHeader;
530 StringRef Framework = FromHFI.Framework;
532 HeaderFileInfo &ToHFI = getFileInfo(FE);
533 ToHFI.DirInfo = DirInfo;
534 ToHFI.IndexHeaderMapHeader = IndexHeaderMapHeader;
535 ToHFI.Framework = Framework;
537 if (SearchPath != NULL) {
538 StringRef SearchPathRef(CurFileEnt->getDir()->getName());
540 SearchPath->append(SearchPathRef.begin(), SearchPathRef.end());
542 if (RelativePath != NULL) {
543 RelativePath->clear();
544 RelativePath->append(Filename.begin(), Filename.end());
552 // If this is a system #include, ignore the user #include locs.
553 unsigned i = isAngled ? AngledDirIdx : 0;
555 // If this is a #include_next request, start searching after the directory the
556 // file was found in.
558 i = FromDir-&SearchDirs[0];
560 // Cache all of the lookups performed by this method. Many headers are
561 // multiply included, and the "pragma once" optimization prevents them from
562 // being relex/pp'd, but they would still have to search through a
563 // (potentially huge) series of SearchDirs to find it.
564 std::pair<unsigned, unsigned> &CacheLookup =
565 LookupFileCache.GetOrCreateValue(Filename).getValue();
567 // If the entry has been previously looked up, the first value will be
568 // non-zero. If the value is equal to i (the start point of our search), then
569 // this is a matching hit.
570 if (!SkipCache && CacheLookup.first == i+1) {
571 // Skip querying potentially lots of directories for this lookup.
572 i = CacheLookup.second;
574 // Otherwise, this is the first query, or the previous query didn't match
575 // our search start. We will fill in our found location below, so prime the
576 // start point value.
577 CacheLookup.first = i+1;
580 // Check each directory in sequence to see if it contains this file.
581 for (; i != SearchDirs.size(); ++i) {
582 bool InUserSpecifiedSystemFramework = false;
583 const FileEntry *FE =
584 SearchDirs[i].LookupFile(Filename, *this, SearchPath, RelativePath,
585 SuggestedModule, InUserSpecifiedSystemFramework);
588 CurDir = &SearchDirs[i];
590 // This file is a system header or C++ unfriendly if the dir is.
591 HeaderFileInfo &HFI = getFileInfo(FE);
592 HFI.DirInfo = CurDir->getDirCharacteristic();
594 // If the directory characteristic is User but this framework was
595 // user-specified to be treated as a system framework, promote the
597 if (HFI.DirInfo == SrcMgr::C_User && InUserSpecifiedSystemFramework)
598 HFI.DirInfo = SrcMgr::C_System;
600 // If the filename matches a known system header prefix, override
601 // whether the file is a system header.
602 for (unsigned j = SystemHeaderPrefixes.size(); j; --j) {
603 if (Filename.startswith(SystemHeaderPrefixes[j-1].first)) {
604 HFI.DirInfo = SystemHeaderPrefixes[j-1].second ? SrcMgr::C_System
610 // If this file is found in a header map and uses the framework style of
611 // includes, then this header is part of a framework we're building.
612 if (CurDir->isIndexHeaderMap()) {
613 size_t SlashPos = Filename.find('/');
614 if (SlashPos != StringRef::npos) {
615 HFI.IndexHeaderMapHeader = 1;
616 HFI.Framework = getUniqueFrameworkName(StringRef(Filename.begin(),
621 // Remember this location for the next lookup we do.
622 CacheLookup.second = i;
626 // If we are including a file with a quoted include "foo.h" from inside
627 // a header in a framework that is currently being built, and we couldn't
628 // resolve "foo.h" any other way, change the include to <Foo/foo.h>, where
629 // "Foo" is the name of the framework in which the including header was found.
630 if (CurFileEnt && !isAngled && Filename.find('/') == StringRef::npos) {
631 HeaderFileInfo &IncludingHFI = getFileInfo(CurFileEnt);
632 if (IncludingHFI.IndexHeaderMapHeader) {
633 SmallString<128> ScratchFilename;
634 ScratchFilename += IncludingHFI.Framework;
635 ScratchFilename += '/';
636 ScratchFilename += Filename;
638 const FileEntry *Result = LookupFile(ScratchFilename, /*isAngled=*/true,
639 FromDir, CurDir, CurFileEnt,
640 SearchPath, RelativePath,
642 std::pair<unsigned, unsigned> &CacheLookup
643 = LookupFileCache.GetOrCreateValue(Filename).getValue();
645 = LookupFileCache.GetOrCreateValue(ScratchFilename).getValue().second;
650 // Otherwise, didn't find it. Remember we didn't find this.
651 CacheLookup.second = SearchDirs.size();
655 /// LookupSubframeworkHeader - Look up a subframework for the specified
656 /// \#include file. For example, if \#include'ing <HIToolbox/HIToolbox.h> from
657 /// within ".../Carbon.framework/Headers/Carbon.h", check to see if HIToolbox
658 /// is a subframework within Carbon.framework. If so, return the FileEntry
659 /// for the designated file, otherwise return null.
660 const FileEntry *HeaderSearch::
661 LookupSubframeworkHeader(StringRef Filename,
662 const FileEntry *ContextFileEnt,
663 SmallVectorImpl<char> *SearchPath,
664 SmallVectorImpl<char> *RelativePath,
665 Module **SuggestedModule) {
666 assert(ContextFileEnt && "No context file?");
668 // Framework names must have a '/' in the filename. Find it.
669 // FIXME: Should we permit '\' on Windows?
670 size_t SlashPos = Filename.find('/');
671 if (SlashPos == StringRef::npos) return 0;
673 // Look up the base framework name of the ContextFileEnt.
674 const char *ContextName = ContextFileEnt->getName();
676 // If the context info wasn't a framework, couldn't be a subframework.
677 const unsigned DotFrameworkLen = 10;
678 const char *FrameworkPos = strstr(ContextName, ".framework");
679 if (FrameworkPos == 0 ||
680 (FrameworkPos[DotFrameworkLen] != '/' &&
681 FrameworkPos[DotFrameworkLen] != '\\'))
684 SmallString<1024> FrameworkName(ContextName, FrameworkPos+DotFrameworkLen+1);
686 // Append Frameworks/HIToolbox.framework/
687 FrameworkName += "Frameworks/";
688 FrameworkName.append(Filename.begin(), Filename.begin()+SlashPos);
689 FrameworkName += ".framework/";
691 llvm::StringMapEntry<FrameworkCacheEntry> &CacheLookup =
692 FrameworkMap.GetOrCreateValue(Filename.substr(0, SlashPos));
694 // Some other location?
695 if (CacheLookup.getValue().Directory &&
696 CacheLookup.getKeyLength() == FrameworkName.size() &&
697 memcmp(CacheLookup.getKeyData(), &FrameworkName[0],
698 CacheLookup.getKeyLength()) != 0)
701 // Cache subframework.
702 if (CacheLookup.getValue().Directory == 0) {
703 ++NumSubFrameworkLookups;
705 // If the framework dir doesn't exist, we fail.
706 const DirectoryEntry *Dir = FileMgr.getDirectory(FrameworkName.str());
707 if (Dir == 0) return 0;
709 // Otherwise, if it does, remember that this is the right direntry for this
711 CacheLookup.getValue().Directory = Dir;
714 const FileEntry *FE = 0;
716 if (RelativePath != NULL) {
717 RelativePath->clear();
718 RelativePath->append(Filename.begin()+SlashPos+1, Filename.end());
721 // Check ".../Frameworks/HIToolbox.framework/Headers/HIToolbox.h"
722 SmallString<1024> HeadersFilename(FrameworkName);
723 HeadersFilename += "Headers/";
724 if (SearchPath != NULL) {
726 // Without trailing '/'.
727 SearchPath->append(HeadersFilename.begin(), HeadersFilename.end()-1);
730 HeadersFilename.append(Filename.begin()+SlashPos+1, Filename.end());
731 if (!(FE = FileMgr.getFile(HeadersFilename.str(), /*openFile=*/true))) {
733 // Check ".../Frameworks/HIToolbox.framework/PrivateHeaders/HIToolbox.h"
734 HeadersFilename = FrameworkName;
735 HeadersFilename += "PrivateHeaders/";
736 if (SearchPath != NULL) {
738 // Without trailing '/'.
739 SearchPath->append(HeadersFilename.begin(), HeadersFilename.end()-1);
742 HeadersFilename.append(Filename.begin()+SlashPos+1, Filename.end());
743 if (!(FE = FileMgr.getFile(HeadersFilename.str(), /*openFile=*/true)))
747 // This file is a system header or C++ unfriendly if the old file is.
749 // Note that the temporary 'DirInfo' is required here, as either call to
750 // getFileInfo could resize the vector and we don't want to rely on order
752 unsigned DirInfo = getFileInfo(ContextFileEnt).DirInfo;
753 getFileInfo(FE).DirInfo = DirInfo;
755 // If we're supposed to suggest a module, look for one now.
756 if (SuggestedModule) {
757 // Find the top-level framework based on this framework.
758 FrameworkName.pop_back(); // remove the trailing '/'
759 SmallVector<std::string, 4> SubmodulePath;
760 const DirectoryEntry *TopFrameworkDir
761 = ::getTopFrameworkDir(FileMgr, FrameworkName, SubmodulePath);
763 // Determine the name of the top-level framework.
764 StringRef ModuleName = llvm::sys::path::stem(TopFrameworkDir->getName());
766 // Load this framework module. If that succeeds, find the suggested module
767 // for this header, if any.
768 bool IsSystem = false;
769 if (loadFrameworkModule(ModuleName, TopFrameworkDir, IsSystem)) {
770 *SuggestedModule = findModuleForHeader(FE);
777 /// \brief Helper static function to normalize a path for injection into
778 /// a synthetic header.
779 /*static*/ std::string
780 HeaderSearch::NormalizeDashIncludePath(StringRef File, FileManager &FileMgr) {
781 // Implicit include paths should be resolved relative to the current
782 // working directory first, and then use the regular header search
783 // mechanism. The proper way to handle this is to have the
784 // predefines buffer located at the current working directory, but
785 // it has no file entry. For now, workaround this by using an
786 // absolute path if we find the file here, and otherwise letting
787 // header search handle it.
788 SmallString<128> Path(File);
789 llvm::sys::fs::make_absolute(Path);
791 if (llvm::sys::fs::exists(Path.str(), exists) || !exists)
794 FileMgr.getFile(File);
796 return Lexer::Stringify(Path.str());
799 //===----------------------------------------------------------------------===//
800 // File Info Management.
801 //===----------------------------------------------------------------------===//
803 /// \brief Merge the header file info provided by \p OtherHFI into the current
804 /// header file info (\p HFI)
805 static void mergeHeaderFileInfo(HeaderFileInfo &HFI,
806 const HeaderFileInfo &OtherHFI) {
807 HFI.isImport |= OtherHFI.isImport;
808 HFI.isPragmaOnce |= OtherHFI.isPragmaOnce;
809 HFI.isModuleHeader |= OtherHFI.isModuleHeader;
810 HFI.NumIncludes += OtherHFI.NumIncludes;
812 if (!HFI.ControllingMacro && !HFI.ControllingMacroID) {
813 HFI.ControllingMacro = OtherHFI.ControllingMacro;
814 HFI.ControllingMacroID = OtherHFI.ControllingMacroID;
817 if (OtherHFI.External) {
818 HFI.DirInfo = OtherHFI.DirInfo;
819 HFI.External = OtherHFI.External;
820 HFI.IndexHeaderMapHeader = OtherHFI.IndexHeaderMapHeader;
823 if (HFI.Framework.empty())
824 HFI.Framework = OtherHFI.Framework;
829 /// getFileInfo - Return the HeaderFileInfo structure for the specified
831 HeaderFileInfo &HeaderSearch::getFileInfo(const FileEntry *FE) {
832 if (FE->getUID() >= FileInfo.size())
833 FileInfo.resize(FE->getUID()+1);
835 HeaderFileInfo &HFI = FileInfo[FE->getUID()];
836 if (ExternalSource && !HFI.Resolved)
837 mergeHeaderFileInfo(HFI, ExternalSource->GetHeaderFileInfo(FE));
841 bool HeaderSearch::isFileMultipleIncludeGuarded(const FileEntry *File) {
842 // Check if we've ever seen this file as a header.
843 if (File->getUID() >= FileInfo.size())
846 // Resolve header file info from the external source, if needed.
847 HeaderFileInfo &HFI = FileInfo[File->getUID()];
848 if (ExternalSource && !HFI.Resolved)
849 mergeHeaderFileInfo(HFI, ExternalSource->GetHeaderFileInfo(File));
851 return HFI.isPragmaOnce || HFI.isImport ||
852 HFI.ControllingMacro || HFI.ControllingMacroID;
855 void HeaderSearch::MarkFileModuleHeader(const FileEntry *FE) {
856 if (FE->getUID() >= FileInfo.size())
857 FileInfo.resize(FE->getUID()+1);
859 HeaderFileInfo &HFI = FileInfo[FE->getUID()];
860 HFI.isModuleHeader = true;
863 void HeaderSearch::setHeaderFileInfoForUID(HeaderFileInfo HFI, unsigned UID) {
864 if (UID >= FileInfo.size())
865 FileInfo.resize(UID+1);
870 bool HeaderSearch::ShouldEnterIncludeFile(const FileEntry *File, bool isImport){
871 ++NumIncluded; // Count # of attempted #includes.
873 // Get information about this file.
874 HeaderFileInfo &FileInfo = getFileInfo(File);
876 // If this is a #import directive, check that we have not already imported
879 // If this has already been imported, don't import it again.
880 FileInfo.isImport = true;
882 // Has this already been #import'ed or #include'd?
883 if (FileInfo.NumIncludes) return false;
885 // Otherwise, if this is a #include of a file that was previously #import'd
886 // or if this is the second #include of a #pragma once file, ignore it.
887 if (FileInfo.isImport)
891 // Next, check to see if the file is wrapped with #ifndef guards. If so, and
892 // if the macro that guards it is defined, we know the #include has no effect.
893 if (const IdentifierInfo *ControllingMacro
894 = FileInfo.getControllingMacro(ExternalLookup))
895 if (ControllingMacro->hasMacroDefinition()) {
896 ++NumMultiIncludeFileOptzn;
900 // Increment the number of times this file has been included.
901 ++FileInfo.NumIncludes;
906 size_t HeaderSearch::getTotalMemory() const {
907 return SearchDirs.capacity()
908 + llvm::capacity_in_bytes(FileInfo)
909 + llvm::capacity_in_bytes(HeaderMaps)
910 + LookupFileCache.getAllocator().getTotalMemory()
911 + FrameworkMap.getAllocator().getTotalMemory();
914 StringRef HeaderSearch::getUniqueFrameworkName(StringRef Framework) {
915 return FrameworkNames.GetOrCreateValue(Framework).getKey();
918 bool HeaderSearch::hasModuleMap(StringRef FileName,
919 const DirectoryEntry *Root) {
920 SmallVector<const DirectoryEntry *, 2> FixUpDirectories;
922 StringRef DirName = FileName;
924 // Get the parent directory name.
925 DirName = llvm::sys::path::parent_path(DirName);
929 // Determine whether this directory exists.
930 const DirectoryEntry *Dir = FileMgr.getDirectory(DirName);
934 // Try to load the module map file in this directory.
935 switch (loadModuleMapFile(Dir)) {
936 case LMM_NewlyLoaded:
937 case LMM_AlreadyLoaded:
938 // Success. All of the directories we stepped through inherit this module
940 for (unsigned I = 0, N = FixUpDirectories.size(); I != N; ++I)
941 DirectoryHasModuleMap[FixUpDirectories[I]] = true;
945 case LMM_NoDirectory:
946 case LMM_InvalidModuleMap:
950 // If we hit the top of our search, we're done.
954 // Keep track of all of the directories we checked, so we can mark them as
955 // having module maps if we eventually do find a module map.
956 FixUpDirectories.push_back(Dir);
960 Module *HeaderSearch::findModuleForHeader(const FileEntry *File) const {
961 if (ExternalSource) {
962 // Make sure the external source has handled header info about this file,
963 // which includes whether the file is part of a module.
964 (void)getFileInfo(File);
966 if (Module *Mod = ModMap.findModuleForHeader(File))
972 bool HeaderSearch::loadModuleMapFile(const FileEntry *File) {
973 const DirectoryEntry *Dir = File->getDir();
975 llvm::DenseMap<const DirectoryEntry *, bool>::iterator KnownDir
976 = DirectoryHasModuleMap.find(Dir);
977 if (KnownDir != DirectoryHasModuleMap.end())
978 return !KnownDir->second;
980 bool Result = ModMap.parseModuleMapFile(File);
981 if (!Result && llvm::sys::path::filename(File->getName()) == "module.map") {
982 // If the file we loaded was a module.map, look for the corresponding
983 // module_private.map.
984 SmallString<128> PrivateFilename(Dir->getName());
985 llvm::sys::path::append(PrivateFilename, "module_private.map");
986 if (const FileEntry *PrivateFile = FileMgr.getFile(PrivateFilename))
987 Result = ModMap.parseModuleMapFile(PrivateFile);
990 DirectoryHasModuleMap[Dir] = !Result;
994 Module *HeaderSearch::loadFrameworkModule(StringRef Name,
995 const DirectoryEntry *Dir,
997 if (Module *Module = ModMap.findModule(Name))
1000 // Try to load a module map file.
1001 switch (loadModuleMapFile(Dir)) {
1002 case LMM_InvalidModuleMap:
1005 case LMM_AlreadyLoaded:
1006 case LMM_NoDirectory:
1009 case LMM_NewlyLoaded:
1010 return ModMap.findModule(Name);
1013 // Figure out the top-level framework directory and the submodule path from
1014 // that top-level framework to the requested framework.
1015 SmallVector<std::string, 2> SubmodulePath;
1016 SubmodulePath.push_back(Name);
1017 const DirectoryEntry *TopFrameworkDir
1018 = ::getTopFrameworkDir(FileMgr, Dir->getName(), SubmodulePath);
1021 // Try to infer a module map from the top-level framework directory.
1022 Module *Result = ModMap.inferFrameworkModule(SubmodulePath.back(),
1029 // Follow the submodule path to find the requested (sub)framework module
1030 // within the top-level framework module.
1031 SubmodulePath.pop_back();
1032 while (!SubmodulePath.empty() && Result) {
1033 Result = ModMap.lookupModuleQualified(SubmodulePath.back(), Result);
1034 SubmodulePath.pop_back();
1040 HeaderSearch::LoadModuleMapResult
1041 HeaderSearch::loadModuleMapFile(StringRef DirName) {
1042 if (const DirectoryEntry *Dir = FileMgr.getDirectory(DirName))
1043 return loadModuleMapFile(Dir);
1045 return LMM_NoDirectory;
1048 HeaderSearch::LoadModuleMapResult
1049 HeaderSearch::loadModuleMapFile(const DirectoryEntry *Dir) {
1050 llvm::DenseMap<const DirectoryEntry *, bool>::iterator KnownDir
1051 = DirectoryHasModuleMap.find(Dir);
1052 if (KnownDir != DirectoryHasModuleMap.end())
1053 return KnownDir->second? LMM_AlreadyLoaded : LMM_InvalidModuleMap;
1055 SmallString<128> ModuleMapFileName;
1056 ModuleMapFileName += Dir->getName();
1057 unsigned ModuleMapDirNameLen = ModuleMapFileName.size();
1058 llvm::sys::path::append(ModuleMapFileName, "module.map");
1059 if (const FileEntry *ModuleMapFile = FileMgr.getFile(ModuleMapFileName)) {
1060 // We have found a module map file. Try to parse it.
1061 if (ModMap.parseModuleMapFile(ModuleMapFile)) {
1062 // No suitable module map.
1063 DirectoryHasModuleMap[Dir] = false;
1064 return LMM_InvalidModuleMap;
1067 // This directory has a module map.
1068 DirectoryHasModuleMap[Dir] = true;
1070 // Check whether there is a private module map that we need to load as well.
1071 ModuleMapFileName.erase(ModuleMapFileName.begin() + ModuleMapDirNameLen,
1072 ModuleMapFileName.end());
1073 llvm::sys::path::append(ModuleMapFileName, "module_private.map");
1074 if (const FileEntry *PrivateModuleMapFile
1075 = FileMgr.getFile(ModuleMapFileName)) {
1076 if (ModMap.parseModuleMapFile(PrivateModuleMapFile)) {
1077 // No suitable module map.
1078 DirectoryHasModuleMap[Dir] = false;
1079 return LMM_InvalidModuleMap;
1083 return LMM_NewlyLoaded;
1086 // No suitable module map.
1087 DirectoryHasModuleMap[Dir] = false;
1088 return LMM_InvalidModuleMap;
1091 void HeaderSearch::collectAllModules(SmallVectorImpl<Module *> &Modules) {
1094 // Load module maps for each of the header search directories.
1095 for (unsigned Idx = 0, N = SearchDirs.size(); Idx != N; ++Idx) {
1096 if (SearchDirs[Idx].isFramework()) {
1097 llvm::error_code EC;
1098 SmallString<128> DirNative;
1099 llvm::sys::path::native(SearchDirs[Idx].getFrameworkDir()->getName(),
1102 // Search each of the ".framework" directories to load them as modules.
1103 bool IsSystem = SearchDirs[Idx].getDirCharacteristic() != SrcMgr::C_User;
1104 for (llvm::sys::fs::directory_iterator Dir(DirNative.str(), EC), DirEnd;
1105 Dir != DirEnd && !EC; Dir.increment(EC)) {
1106 if (llvm::sys::path::extension(Dir->path()) != ".framework")
1109 const DirectoryEntry *FrameworkDir = FileMgr.getDirectory(Dir->path());
1113 // Load this framework module.
1114 loadFrameworkModule(llvm::sys::path::stem(Dir->path()), FrameworkDir,
1120 // FIXME: Deal with header maps.
1121 if (SearchDirs[Idx].isHeaderMap())
1124 // Try to load a module map file for the search directory.
1125 loadModuleMapFile(SearchDirs[Idx].getDir());
1127 // Try to load module map files for immediate subdirectories of this search
1129 llvm::error_code EC;
1130 SmallString<128> DirNative;
1131 llvm::sys::path::native(SearchDirs[Idx].getDir()->getName(), DirNative);
1132 for (llvm::sys::fs::directory_iterator Dir(DirNative.str(), EC), DirEnd;
1133 Dir != DirEnd && !EC; Dir.increment(EC)) {
1134 loadModuleMapFile(Dir->path());
1138 // Populate the list of modules.
1139 for (ModuleMap::module_iterator M = ModMap.module_begin(),
1140 MEnd = ModMap.module_end();
1142 Modules.push_back(M->getValue());