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-rw-r--r--lib/Lex/HeaderSearch.cpp311
1 files changed, 194 insertions, 117 deletions
diff --git a/lib/Lex/HeaderSearch.cpp b/lib/Lex/HeaderSearch.cpp
index 67000b68..304bd69 100644
--- a/lib/Lex/HeaderSearch.cpp
+++ b/lib/Lex/HeaderSearch.cpp
@@ -12,17 +12,20 @@
//===----------------------------------------------------------------------===//
#include "clang/Lex/HeaderSearch.h"
-#include "clang/Lex/HeaderSearchOptions.h"
-#include "clang/Lex/HeaderMap.h"
-#include "clang/Lex/Lexer.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/IdentifierTable.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/Path.h"
+#include "clang/Lex/HeaderMap.h"
+#include "clang/Lex/HeaderSearchOptions.h"
+#include "clang/Lex/Lexer.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Capacity.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Path.h"
#include <cstdio>
+#if defined(LLVM_ON_UNIX)
+#include <limits.h>
+#endif
using namespace clang;
const IdentifierInfo *
@@ -39,12 +42,12 @@ HeaderFileInfo::getControllingMacro(ExternalIdentifierLookup *External) {
ExternalHeaderFileInfoSource::~ExternalHeaderFileInfoSource() {}
-HeaderSearch::HeaderSearch(llvm::IntrusiveRefCntPtr<HeaderSearchOptions> HSOpts,
+HeaderSearch::HeaderSearch(IntrusiveRefCntPtr<HeaderSearchOptions> HSOpts,
FileManager &FM, DiagnosticsEngine &Diags,
const LangOptions &LangOpts,
const TargetInfo *Target)
: HSOpts(HSOpts), FileMgr(FM), FrameworkMap(64),
- ModMap(FileMgr, *Diags.getClient(), LangOpts, Target)
+ ModMap(FileMgr, *Diags.getClient(), LangOpts, Target, *this)
{
AngledDirIdx = 0;
SystemDirIdx = 0;
@@ -134,7 +137,7 @@ Module *HeaderSearch::lookupModule(StringRef ModuleName, bool AllowSearch) {
if (Module || !AllowSearch)
return Module;
- // Look through the various header search paths to load any avai;able module
+ // Look through the various header search paths to load any available module
// maps, searching for a module map that describes this module.
for (unsigned Idx = 0, N = SearchDirs.size(); Idx != N; ++Idx) {
if (SearchDirs[Idx].isFramework()) {
@@ -178,8 +181,22 @@ Module *HeaderSearch::lookupModule(StringRef ModuleName, bool AllowSearch) {
if (Module)
break;
}
+
+ // If we've already performed the exhaustive search for module maps in this
+ // search directory, don't do it again.
+ if (SearchDirs[Idx].haveSearchedAllModuleMaps())
+ continue;
+
+ // Load all module maps in the immediate subdirectories of this search
+ // directory.
+ loadSubdirectoryModuleMaps(SearchDirs[Idx]);
+
+ // Look again for the module.
+ Module = ModMap.findModule(ModuleName);
+ if (Module)
+ break;
}
-
+
return Module;
}
@@ -263,6 +280,55 @@ const FileEntry *DirectoryLookup::LookupFile(
return Result;
}
+/// \brief Given a framework directory, find the top-most framework directory.
+///
+/// \param FileMgr The file manager to use for directory lookups.
+/// \param DirName The name of the framework directory.
+/// \param SubmodulePath Will be populated with the submodule path from the
+/// returned top-level module to the originally named framework.
+static const DirectoryEntry *
+getTopFrameworkDir(FileManager &FileMgr, StringRef DirName,
+ SmallVectorImpl<std::string> &SubmodulePath) {
+ assert(llvm::sys::path::extension(DirName) == ".framework" &&
+ "Not a framework directory");
+
+ // Note: as an egregious but useful hack we use the real path here, because
+ // frameworks moving between top-level frameworks to embedded frameworks tend
+ // to be symlinked, and we base the logical structure of modules on the
+ // physical layout. In particular, we need to deal with crazy includes like
+ //
+ // #include <Foo/Frameworks/Bar.framework/Headers/Wibble.h>
+ //
+ // where 'Bar' used to be embedded in 'Foo', is now a top-level framework
+ // which one should access with, e.g.,
+ //
+ // #include <Bar/Wibble.h>
+ //
+ // Similar issues occur when a top-level framework has moved into an
+ // embedded framework.
+ const DirectoryEntry *TopFrameworkDir = FileMgr.getDirectory(DirName);
+ DirName = FileMgr.getCanonicalName(TopFrameworkDir);
+ do {
+ // Get the parent directory name.
+ DirName = llvm::sys::path::parent_path(DirName);
+ if (DirName.empty())
+ break;
+
+ // Determine whether this directory exists.
+ const DirectoryEntry *Dir = FileMgr.getDirectory(DirName);
+ if (!Dir)
+ break;
+
+ // If this is a framework directory, then we're a subframework of this
+ // framework.
+ if (llvm::sys::path::extension(DirName) == ".framework") {
+ SubmodulePath.push_back(llvm::sys::path::stem(DirName));
+ TopFrameworkDir = Dir;
+ }
+ } while (true);
+
+ return TopFrameworkDir;
+}
/// DoFrameworkLookup - Do a lookup of the specified file in the current
/// DirectoryLookup, which is a framework directory.
@@ -334,17 +400,6 @@ const FileEntry *DirectoryLookup::DoFrameworkLookup(
RelativePath->clear();
RelativePath->append(Filename.begin()+SlashPos+1, Filename.end());
}
-
- // If we're allowed to look for modules, try to load or create the module
- // corresponding to this framework.
- Module *Module = 0;
- if (SuggestedModule) {
- if (const DirectoryEntry *FrameworkDir
- = FileMgr.getDirectory(FrameworkName)) {
- bool IsSystem = getDirCharacteristic() != SrcMgr::C_User;
- Module = HS.loadFrameworkModule(ModuleName, FrameworkDir, IsSystem);
- }
- }
// Check "/System/Library/Frameworks/Cocoa.framework/Headers/file.h"
unsigned OrigSize = FrameworkName.size();
@@ -357,28 +412,64 @@ const FileEntry *DirectoryLookup::DoFrameworkLookup(
SearchPath->append(FrameworkName.begin(), FrameworkName.end()-1);
}
- // Determine whether this is the module we're building or not.
- bool AutomaticImport = Module;
FrameworkName.append(Filename.begin()+SlashPos+1, Filename.end());
- if (const FileEntry *FE = FileMgr.getFile(FrameworkName.str(),
- /*openFile=*/!AutomaticImport)) {
- if (AutomaticImport)
- *SuggestedModule = HS.findModuleForHeader(FE);
- return FE;
+ const FileEntry *FE = FileMgr.getFile(FrameworkName.str(),
+ /*openFile=*/!SuggestedModule);
+ if (!FE) {
+ // Check "/System/Library/Frameworks/Cocoa.framework/PrivateHeaders/file.h"
+ const char *Private = "Private";
+ FrameworkName.insert(FrameworkName.begin()+OrigSize, Private,
+ Private+strlen(Private));
+ if (SearchPath != NULL)
+ SearchPath->insert(SearchPath->begin()+OrigSize, Private,
+ Private+strlen(Private));
+
+ FE = FileMgr.getFile(FrameworkName.str(), /*openFile=*/!SuggestedModule);
}
- // Check "/System/Library/Frameworks/Cocoa.framework/PrivateHeaders/file.h"
- const char *Private = "Private";
- FrameworkName.insert(FrameworkName.begin()+OrigSize, Private,
- Private+strlen(Private));
- if (SearchPath != NULL)
- SearchPath->insert(SearchPath->begin()+OrigSize, Private,
- Private+strlen(Private));
-
- const FileEntry *FE = FileMgr.getFile(FrameworkName.str(),
- /*openFile=*/!AutomaticImport);
- if (FE && AutomaticImport)
- *SuggestedModule = HS.findModuleForHeader(FE);
+ // If we found the header and are allowed to suggest a module, do so now.
+ if (FE && SuggestedModule) {
+ // Find the framework in which this header occurs.
+ StringRef FrameworkPath = FE->getName();
+ bool FoundFramework = false;
+ do {
+ // Get the parent directory name.
+ FrameworkPath = llvm::sys::path::parent_path(FrameworkPath);
+ if (FrameworkPath.empty())
+ break;
+
+ // Determine whether this directory exists.
+ const DirectoryEntry *Dir = FileMgr.getDirectory(FrameworkPath);
+ if (!Dir)
+ break;
+
+ // If this is a framework directory, then we're a subframework of this
+ // framework.
+ if (llvm::sys::path::extension(FrameworkPath) == ".framework") {
+ FoundFramework = true;
+ break;
+ }
+ } while (true);
+
+ if (FoundFramework) {
+ // Find the top-level framework based on this framework.
+ SmallVector<std::string, 4> SubmodulePath;
+ const DirectoryEntry *TopFrameworkDir
+ = ::getTopFrameworkDir(FileMgr, FrameworkPath, SubmodulePath);
+
+ // Determine the name of the top-level framework.
+ StringRef ModuleName = llvm::sys::path::stem(TopFrameworkDir->getName());
+
+ // Load this framework module. If that succeeds, find the suggested module
+ // for this header, if any.
+ bool IsSystem = getDirCharacteristic() != SrcMgr::C_User;
+ if (HS.loadFrameworkModule(ModuleName, TopFrameworkDir, IsSystem)) {
+ *SuggestedModule = HS.findModuleForHeader(FE);
+ }
+ } else {
+ *SuggestedModule = HS.findModuleForHeader(FE);
+ }
+ }
return FE;
}
@@ -584,7 +675,8 @@ const FileEntry *HeaderSearch::
LookupSubframeworkHeader(StringRef Filename,
const FileEntry *ContextFileEnt,
SmallVectorImpl<char> *SearchPath,
- SmallVectorImpl<char> *RelativePath) {
+ SmallVectorImpl<char> *RelativePath,
+ Module **SuggestedModule) {
assert(ContextFileEnt && "No context file?");
// Framework names must have a '/' in the filename. Find it.
@@ -673,6 +765,26 @@ LookupSubframeworkHeader(StringRef Filename,
// of evaluation.
unsigned DirInfo = getFileInfo(ContextFileEnt).DirInfo;
getFileInfo(FE).DirInfo = DirInfo;
+
+ // If we're supposed to suggest a module, look for one now.
+ if (SuggestedModule) {
+ // Find the top-level framework based on this framework.
+ FrameworkName.pop_back(); // remove the trailing '/'
+ SmallVector<std::string, 4> SubmodulePath;
+ const DirectoryEntry *TopFrameworkDir
+ = ::getTopFrameworkDir(FileMgr, FrameworkName, SubmodulePath);
+
+ // Determine the name of the top-level framework.
+ StringRef ModuleName = llvm::sys::path::stem(TopFrameworkDir->getName());
+
+ // Load this framework module. If that succeeds, find the suggested module
+ // for this header, if any.
+ bool IsSystem = false;
+ if (loadFrameworkModule(ModuleName, TopFrameworkDir, IsSystem)) {
+ *SuggestedModule = findModuleForHeader(FE);
+ }
+ }
+
return FE;
}
@@ -708,6 +820,7 @@ static void mergeHeaderFileInfo(HeaderFileInfo &HFI,
const HeaderFileInfo &OtherHFI) {
HFI.isImport |= OtherHFI.isImport;
HFI.isPragmaOnce |= OtherHFI.isPragmaOnce;
+ HFI.isModuleHeader |= OtherHFI.isModuleHeader;
HFI.NumIncludes += OtherHFI.NumIncludes;
if (!HFI.ControllingMacro && !HFI.ControllingMacroID) {
@@ -749,7 +862,16 @@ bool HeaderSearch::isFileMultipleIncludeGuarded(const FileEntry *File) {
if (ExternalSource && !HFI.Resolved)
mergeHeaderFileInfo(HFI, ExternalSource->GetHeaderFileInfo(File));
- return HFI.isPragmaOnce || HFI.ControllingMacro || HFI.ControllingMacroID;
+ return HFI.isPragmaOnce || HFI.isImport ||
+ HFI.ControllingMacro || HFI.ControllingMacroID;
+}
+
+void HeaderSearch::MarkFileModuleHeader(const FileEntry *FE) {
+ if (FE->getUID() >= FileInfo.size())
+ FileInfo.resize(FE->getUID()+1);
+
+ HeaderFileInfo &HFI = FileInfo[FE->getUID()];
+ HFI.isModuleHeader = true;
}
void HeaderSearch::setHeaderFileInfoForUID(HeaderFileInfo HFI, unsigned UID) {
@@ -809,7 +931,7 @@ StringRef HeaderSearch::getUniqueFrameworkName(StringRef Framework) {
bool HeaderSearch::hasModuleMap(StringRef FileName,
const DirectoryEntry *Root) {
- llvm::SmallVector<const DirectoryEntry *, 2> FixUpDirectories;
+ SmallVector<const DirectoryEntry *, 2> FixUpDirectories;
StringRef DirName = FileName;
do {
@@ -849,7 +971,12 @@ bool HeaderSearch::hasModuleMap(StringRef FileName,
} while (true);
}
-Module *HeaderSearch::findModuleForHeader(const FileEntry *File) {
+Module *HeaderSearch::findModuleForHeader(const FileEntry *File) const {
+ if (ExternalSource) {
+ // Make sure the external source has handled header info about this file,
+ // which includes whether the file is part of a module.
+ (void)getFileInfo(File);
+ }
if (Module *Mod = ModMap.findModuleForHeader(File))
return Mod;
@@ -897,80 +1024,21 @@ Module *HeaderSearch::loadFrameworkModule(StringRef Name,
return ModMap.findModule(Name);
}
- // The top-level framework directory, from which we'll infer a framework
- // module.
- const DirectoryEntry *TopFrameworkDir = Dir;
-
- // The path from the module we're actually looking for back to the top-level
- // framework name.
- llvm::SmallVector<StringRef, 2> SubmodulePath;
+ // Figure out the top-level framework directory and the submodule path from
+ // that top-level framework to the requested framework.
+ SmallVector<std::string, 2> SubmodulePath;
SubmodulePath.push_back(Name);
-
- // Walk the directory structure to find any enclosing frameworks.
-#ifdef LLVM_ON_UNIX
- // Note: as an egregious but useful hack we use the real path here, because
- // frameworks moving from top-level frameworks to embedded frameworks tend
- // to be symlinked from the top-level location to the embedded location,
- // and we need to resolve lookups as if we had found the embedded location.
- char RealDirName[PATH_MAX];
- StringRef DirName;
- if (realpath(Dir->getName(), RealDirName))
- DirName = RealDirName;
- else
- DirName = Dir->getName();
-#else
- StringRef DirName = Dir->getName();
-#endif
- do {
- // Get the parent directory name.
- DirName = llvm::sys::path::parent_path(DirName);
- if (DirName.empty())
- break;
-
- // Determine whether this directory exists.
- Dir = FileMgr.getDirectory(DirName);
- if (!Dir)
- break;
-
- // If this is a framework directory, then we're a subframework of this
- // framework.
- if (llvm::sys::path::extension(DirName) == ".framework") {
- SubmodulePath.push_back(llvm::sys::path::stem(DirName));
- TopFrameworkDir = Dir;
- }
- } while (true);
+ const DirectoryEntry *TopFrameworkDir
+ = ::getTopFrameworkDir(FileMgr, Dir->getName(), SubmodulePath);
- // Determine whether we're allowed to infer a module map.
- bool canInfer = false;
- if (llvm::sys::path::has_parent_path(TopFrameworkDir->getName())) {
- // Figure out the parent path.
- StringRef Parent = llvm::sys::path::parent_path(TopFrameworkDir->getName());
- if (const DirectoryEntry *ParentDir = FileMgr.getDirectory(Parent)) {
- // If there's a module map file in the parent directory, it can
- // explicitly allow us to infer framework modules.
- switch (loadModuleMapFile(ParentDir)) {
- case LMM_AlreadyLoaded:
- case LMM_NewlyLoaded: {
- StringRef Name = llvm::sys::path::stem(TopFrameworkDir->getName());
- canInfer = ModMap.canInferFrameworkModule(ParentDir, Name, IsSystem);
- break;
- }
- case LMM_InvalidModuleMap:
- case LMM_NoDirectory:
- break;
- }
- }
- }
-
- // If we're not allowed to infer a module map, we're done.
- if (!canInfer)
- return 0;
// Try to infer a module map from the top-level framework directory.
Module *Result = ModMap.inferFrameworkModule(SubmodulePath.back(),
TopFrameworkDir,
IsSystem,
/*Parent=*/0);
+ if (!Result)
+ return 0;
// Follow the submodule path to find the requested (sub)framework module
// within the top-level framework module.
@@ -1034,7 +1102,7 @@ HeaderSearch::loadModuleMapFile(const DirectoryEntry *Dir) {
return LMM_InvalidModuleMap;
}
-void HeaderSearch::collectAllModules(llvm::SmallVectorImpl<Module *> &Modules) {
+void HeaderSearch::collectAllModules(SmallVectorImpl<Module *> &Modules) {
Modules.clear();
// Load module maps for each of the header search directories.
@@ -1072,13 +1140,7 @@ void HeaderSearch::collectAllModules(llvm::SmallVectorImpl<Module *> &Modules) {
// Try to load module map files for immediate subdirectories of this search
// directory.
- llvm::error_code EC;
- SmallString<128> DirNative;
- llvm::sys::path::native(SearchDirs[Idx].getDir()->getName(), DirNative);
- for (llvm::sys::fs::directory_iterator Dir(DirNative.str(), EC), DirEnd;
- Dir != DirEnd && !EC; Dir.increment(EC)) {
- loadModuleMapFile(Dir->path());
- }
+ loadSubdirectoryModuleMaps(SearchDirs[Idx]);
}
// Populate the list of modules.
@@ -1088,3 +1150,18 @@ void HeaderSearch::collectAllModules(llvm::SmallVectorImpl<Module *> &Modules) {
Modules.push_back(M->getValue());
}
}
+
+void HeaderSearch::loadSubdirectoryModuleMaps(DirectoryLookup &SearchDir) {
+ if (SearchDir.haveSearchedAllModuleMaps())
+ return;
+
+ llvm::error_code EC;
+ SmallString<128> DirNative;
+ llvm::sys::path::native(SearchDir.getDir()->getName(), DirNative);
+ for (llvm::sys::fs::directory_iterator Dir(DirNative.str(), EC), DirEnd;
+ Dir != DirEnd && !EC; Dir.increment(EC)) {
+ loadModuleMapFile(Dir->path());
+ }
+
+ SearchDir.setSearchedAllModuleMaps(true);
+}
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