//===--- ModuleMap.cpp - Describe the layout of modules ---------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the ModuleMap implementation, which describes the layout
// of a module as it relates to headers.
//
//===----------------------------------------------------------------------===//
#include "clang/Lex/ModuleMap.h"
#include "clang/Basic/CharInfo.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/DiagnosticOptions.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/TargetOptions.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Lex/HeaderSearchOptions.h"
#include "clang/Lex/LexDiagnostic.h"
#include "clang/Lex/Lexer.h"
#include "clang/Lex/LiteralSupport.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/raw_ostream.h"
#include <stdlib.h>
#if defined(LLVM_ON_UNIX)
#include <limits.h>
#endif
using namespace clang;
Module::ExportDecl
ModuleMap::resolveExport(Module *Mod,
const Module::UnresolvedExportDecl &Unresolved,
bool Complain) const {
// We may have just a wildcard.
if (Unresolved.Id.empty()) {
assert(Unresolved.Wildcard && "Invalid unresolved export");
return Module::ExportDecl(nullptr, true);
}
// Resolve the module-id.
Module *Context = resolveModuleId(Unresolved.Id, Mod, Complain);
if (!Context)
return Module::ExportDecl();
return Module::ExportDecl(Context, Unresolved.Wildcard);
}
Module *ModuleMap::resolveModuleId(const ModuleId &Id, Module *Mod,
bool Complain) const {
// Find the starting module.
Module *Context = lookupModuleUnqualified(Id[0].first, Mod);
if (!Context) {
if (Complain)
Diags.Report(Id[0].second, diag::err_mmap_missing_module_unqualified)
<< Id[0].first << Mod->getFullModuleName();
return nullptr;
}
// Dig into the module path.
for (unsigned I = 1, N = Id.size(); I != N; ++I) {
Module *Sub = lookupModuleQualified(Id[I].first, Context);
if (!Sub) {
if (Complain)
Diags.Report(Id[I].second, diag::err_mmap_missing_module_qualified)
<< Id[I].first << Context->getFullModuleName()
<< SourceRange(Id[0].second, Id[I-1].second);
return nullptr;
}
Context = Sub;
}
return Context;
}
ModuleMap::ModuleMap(SourceManager &SourceMgr, DiagnosticsEngine &Diags,
const LangOptions &LangOpts, const TargetInfo *Target,
HeaderSearch &HeaderInfo)
: SourceMgr(SourceMgr), Diags(Diags), LangOpts(LangOpts), Target(Target),
HeaderInfo(HeaderInfo), BuiltinIncludeDir(nullptr),
CompilingModule(nullptr), SourceModule(nullptr), NumCreatedModules(0) {
MMapLangOpts.LineComment = true;
}
ModuleMap::~ModuleMap() {
for (llvm::StringMap<Module *>::iterator I = Modules.begin(),
IEnd = Modules.end();
I != IEnd; ++I) {
delete I->getValue();
}
}
void ModuleMap::setTarget(const TargetInfo &Target) {
assert((!this->Target || this->Target == &Target) &&
"Improper target override");
this->Target = &Target;
}
/// \brief "Sanitize" a filename so that it can be used as an identifier.
static StringRef sanitizeFilenameAsIdentifier(StringRef Name,
SmallVectorImpl<char> &Buffer) {
if (Name.empty())
return Name;
if (!isValidIdentifier(Name)) {
// If we don't already have something with the form of an identifier,
// create a buffer with the sanitized name.
Buffer.clear();
if (isDigit(Name[0]))
Buffer.push_back('_');
Buffer.reserve(Buffer.size() + Name.size());
for (unsigned I = 0, N = Name.size(); I != N; ++I) {
if (isIdentifierBody(Name[I]))
Buffer.push_back(Name[I]);
else
Buffer.push_back('_');
}
Name = StringRef(Buffer.data(), Buffer.size());
}
while (llvm::StringSwitch<bool>(Name)
#define KEYWORD(Keyword,Conditions) .Case(#Keyword, true)
#define ALIAS(Keyword, AliasOf, Conditions) .Case(Keyword, true)
#include "clang/Basic/TokenKinds.def"
.Default(false)) {
if (Name.data() != Buffer.data())
Buffer.append(Name.begin(), Name.end());
Buffer.push_back('_');
Name = StringRef(Buffer.data(), Buffer.size());
}
return Name;
}
/// \brief Determine whether the given file name is the name of a builtin
/// header, supplied by Clang to replace, override, or augment existing system
/// headers.
static bool isBuiltinHeader(StringRef FileName) {
return llvm::StringSwitch<bool>(FileName)
.Case("float.h", true)
.Case("iso646.h", true)
.Case("limits.h", true)
.Case("stdalign.h", true)
.Case("stdarg.h", true)
.Case("stdbool.h", true)
.Case("stddef.h", true)
.Case("stdint.h", true)
.Case("tgmath.h", true)
.Case("unwind.h", true)
.Default(false);
}
ModuleMap::HeadersMap::iterator
ModuleMap::findKnownHeader(const FileEntry *File) {
HeadersMap::iterator Known = Headers.find(File);
if (HeaderInfo.getHeaderSearchOpts().ImplicitModuleMaps &&
Known == Headers.end() && File->getDir() == BuiltinIncludeDir &&
isBuiltinHeader(llvm::sys::path::filename(File->getName()))) {
HeaderInfo.loadTopLevelSystemModules();
return Headers.find(File);
}
return Known;
}
ModuleMap::KnownHeader
ModuleMap::findHeaderInUmbrellaDirs(const FileEntry *File,
SmallVectorImpl<const DirectoryEntry *> &IntermediateDirs) {
if (UmbrellaDirs.empty())
return KnownHeader();
const DirectoryEntry *Dir = File->getDir();
assert(Dir && "file in no directory");
// 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.
StringRef DirName = SourceMgr.getFileManager().getCanonicalName(Dir);
// Keep walking up the directory hierarchy, looking for a directory with
// an umbrella header.
do {
auto KnownDir = UmbrellaDirs.find(Dir);
if (KnownDir != UmbrellaDirs.end())
return KnownHeader(KnownDir->second, NormalHeader);
IntermediateDirs.push_back(Dir);
// Retrieve our parent path.
DirName = llvm::sys::path::parent_path(DirName);
if (DirName.empty())
break;
// Resolve the parent path to a directory entry.
Dir = SourceMgr.getFileManager().getDirectory(DirName);
} while (Dir);
return KnownHeader();
}
static bool violatesPrivateInclude(Module *RequestingModule,
const FileEntry *IncFileEnt,
ModuleMap::ModuleHeaderRole Role,
Module *RequestedModule) {
bool IsPrivateRole = Role & ModuleMap::PrivateHeader;
#ifndef NDEBUG
if (IsPrivateRole) {
// Check for consistency between the module header role
// as obtained from the lookup and as obtained from the module.
// This check is not cheap, so enable it only for debugging.
bool IsPrivate = false;
SmallVectorImpl<Module::Header> *HeaderList[] = {
&RequestedModule->Headers[Module::HK_Private],
&RequestedModule->Headers[Module::HK_PrivateTextual]};
for (auto *Hs : HeaderList)
IsPrivate |=
std::find_if(Hs->begin(), Hs->end(), [&](const Module::Header &H) {
return H.Entry == IncFileEnt;
}) != Hs->end();
assert((!IsPrivateRole || IsPrivate) && "inconsistent headers and roles");
}
#endif
return IsPrivateRole && (!RequestingModule ||
RequestedModule->getTopLevelModule() !=
RequestingModule->getTopLevelModule());
}
static Module *getTopLevelOrNull(Module *M) {
return M ? M->getTopLevelModule() : nullptr;
}
void ModuleMap::diagnoseHeaderInclusion(Module *RequestingModule,
SourceLocation FilenameLoc,
StringRef Filename,
const FileEntry *File) {
// No errors for indirect modules. This may be a bit of a problem for modules
// with no source files.
if (getTopLevelOrNull(RequestingModule) != getTopLevelOrNull(SourceModule))
return;
if (RequestingModule)
resolveUses(RequestingModule, /*Complain=*/false);
bool Excluded = false;
Module *Private = nullptr;
Module *NotUsed = nullptr;
HeadersMap::iterator Known = findKnownHeader(File);
if (Known != Headers.end()) {
for (const KnownHeader &Header : Known->second) {
// Remember private headers for later printing of a diagnostic.
if (violatesPrivateInclude(RequestingModule, File, Header.getRole(),
Header.getModule())) {
Private = Header.getModule();
continue;
}
// If uses need to be specified explicitly, we are only allowed to return
// modules that are explicitly used by the requesting module.
if (RequestingModule && LangOpts.ModulesDeclUse &&
!RequestingModule->directlyUses(Header.getModule())) {
NotUsed = Header.getModule();
continue;
}
// We have found a module that we can happily use.
return;
}
Excluded = true;
}
// We have found a header, but it is private.
if (Private) {
Diags.Report(FilenameLoc, diag::warn_use_of_private_header_outside_module)
<< Filename;
return;
}
// We have found a module, but we don't use it.
if (NotUsed) {
Diags.Report(FilenameLoc, diag::err_undeclared_use_of_module)
<< RequestingModule->getFullModuleName() << Filename;
return;
}
if (Excluded || isHeaderInUmbrellaDirs(File))
return;
// At this point, only non-modular includes remain.
if (LangOpts.ModulesStrictDeclUse) {
Diags.Report(FilenameLoc, diag::err_undeclared_use_of_module)
<< RequestingModule->getFullModuleName() << Filename;
} else if (RequestingModule) {
diag::kind DiagID = RequestingModule->getTopLevelModule()->IsFramework ?
diag::warn_non_modular_include_in_framework_module :
diag::warn_non_modular_include_in_module;
Diags.Report(FilenameLoc, DiagID) << RequestingModule->getFullModuleName();
}
}
static bool isBetterKnownHeader(const ModuleMap::KnownHeader &New,
const ModuleMap::KnownHeader &Old) {
// Prefer available modules.
if (New.getModule()->isAvailable() && !Old.getModule()->isAvailable())
return true;
// Prefer a public header over a private header.
if ((New.getRole() & ModuleMap::PrivateHeader) !=
(Old.getRole() & ModuleMap::PrivateHeader))
return !(New.getRole() & ModuleMap::PrivateHeader);
// Prefer a non-textual header over a textual header.
if ((New.getRole() & ModuleMap::TextualHeader) !=
(Old.getRole() & ModuleMap::TextualHeader))
return !(New.getRole() & ModuleMap::TextualHeader);
// Don't have a reason to choose between these. Just keep the first one.
return false;
}
ModuleMap::KnownHeader ModuleMap::findModuleForHeader(const FileEntry *File) {
auto MakeResult = [&](ModuleMap::KnownHeader R) -> ModuleMap::KnownHeader {
if (R.getRole() & ModuleMap::TextualHeader)
return ModuleMap::KnownHeader();
return R;
};
HeadersMap::iterator Known = findKnownHeader(File);
if (Known != Headers.end()) {
ModuleMap::KnownHeader Result;
// Iterate over all modules that 'File' is part of to find the best fit.
for (KnownHeader &H : Known->second) {
// Prefer a header from the current module over all others.
if (H.getModule()->getTopLevelModule() == CompilingModule)
return MakeResult(H);
if (!Result || isBetterKnownHeader(H, Result))
Result = H;
}
return MakeResult(Result);
}
return MakeResult(findOrCreateModuleForHeaderInUmbrellaDir(File));
}
ModuleMap::KnownHeader
ModuleMap::findOrCreateModuleForHeaderInUmbrellaDir(const FileEntry *File) {
assert(!Headers.count(File) && "already have a module for this header");
SmallVector<const DirectoryEntry *, 2> SkippedDirs;
KnownHeader H = findHeaderInUmbrellaDirs(File, SkippedDirs);
if (H) {
Module *Result = H.getModule();
// Search up the module stack until we find a module with an umbrella
// directory.
Module *UmbrellaModule = Result;
while (!UmbrellaModule->getUmbrellaDir() && UmbrellaModule->Parent)
UmbrellaModule = UmbrellaModule->Parent;
if (UmbrellaModule->InferSubmodules) {
const FileEntry *UmbrellaModuleMap =
getModuleMapFileForUniquing(UmbrellaModule);
// Infer submodules for each of the directories we found between
// the directory of the umbrella header and the directory where
// the actual header is located.
bool Explicit = UmbrellaModule->InferExplicitSubmodules;
for (unsigned I = SkippedDirs.size(); I != 0; --I) {
// Find or create the module that corresponds to this directory name.
SmallString<32> NameBuf;
StringRef Name = sanitizeFilenameAsIdentifier(
llvm::sys::path::stem(SkippedDirs[I-1]->getName()), NameBuf);
Result = findOrCreateModule(Name, Result, /*IsFramework=*/false,
Explicit).first;
InferredModuleAllowedBy[Result] = UmbrellaModuleMap;
Result->IsInferred = true;
// Associate the module and the directory.
UmbrellaDirs[SkippedDirs[I-1]] = Result;
// If inferred submodules export everything they import, add a
// wildcard to the set of exports.
if (UmbrellaModule->InferExportWildcard && Result->Exports.empty())
Result->Exports.push_back(Module::ExportDecl(nullptr, true));
}
// Infer a submodule with the same name as this header file.
SmallString<32> NameBuf;
StringRef Name = sanitizeFilenameAsIdentifier(
llvm::sys::path::stem(File->getName()), NameBuf);
Result = findOrCreateModule(Name, Result, /*IsFramework=*/false,
Explicit).first;
InferredModuleAllowedBy[Result] = UmbrellaModuleMap;
Result->IsInferred = true;
Result->addTopHeader(File);
// If inferred submodules export everything they import, add a
// wildcard to the set of exports.
if (UmbrellaModule->InferExportWildcard && Result->Exports.empty())
Result->Exports.push_back(Module::ExportDecl(nullptr, true));
} else {
// Record each of the directories we stepped through as being part of
// the module we found, since the umbrella header covers them all.
for (unsigned I = 0, N = SkippedDirs.size(); I != N; ++I)
UmbrellaDirs[SkippedDirs[I]] = Result;
}
KnownHeader Header(Result, NormalHeader);
Headers[File].push_back(Header);
return Header;
}
return KnownHeader();
}
ArrayRef<ModuleMap::KnownHeader>
ModuleMap::findAllModulesForHeader(const FileEntry *File) const {
auto It = Headers.find(File);
if (It == Headers.end())
return None;
return It->second;
}
bool ModuleMap::isHeaderInUnavailableModule(const FileEntry *Header) const {
return isHeaderUnavailableInModule(Header, nullptr);
}
bool
ModuleMap::isHeaderUnavailableInModule(const FileEntry *Header,
const Module *RequestingModule) const {
HeadersMap::const_iterator Known = Headers.find(Header);
if (Known != Headers.end()) {
for (SmallVectorImpl<KnownHeader>::const_iterator
I = Known->second.begin(),
E = Known->second.end();
I != E; ++I) {
if (I->isAvailable() && (!RequestingModule ||
I->getModule()->isSubModuleOf(RequestingModule)))
return false;
}
return true;
}
const DirectoryEntry *Dir = Header->getDir();
SmallVector<const DirectoryEntry *, 2> SkippedDirs;
StringRef DirName = Dir->getName();
auto IsUnavailable = [&](const Module *M) {
return !M->isAvailable() && (!RequestingModule ||
M->isSubModuleOf(RequestingModule));
};
// Keep walking up the directory hierarchy, looking for a directory with
// an umbrella header.
do {
llvm::DenseMap<const DirectoryEntry *, Module *>::const_iterator KnownDir
= UmbrellaDirs.find(Dir);
if (KnownDir != UmbrellaDirs.end()) {
Module *Found = KnownDir->second;
if (IsUnavailable(Found))
return true;
// Search up the module stack until we find a module with an umbrella
// directory.
Module *UmbrellaModule = Found;
while (!UmbrellaModule->getUmbrellaDir() && UmbrellaModule->Parent)
UmbrellaModule = UmbrellaModule->Parent;
if (UmbrellaModule->InferSubmodules) {
for (unsigned I = SkippedDirs.size(); I != 0; --I) {
// Find or create the module that corresponds to this directory name.
SmallString<32> NameBuf;
StringRef Name = sanitizeFilenameAsIdentifier(
llvm::sys::path::stem(SkippedDirs[I-1]->getName()),
NameBuf);
Found = lookupModuleQualified(Name, Found);
if (!Found)
return false;
if (IsUnavailable(Found))
return true;
}
// Infer a submodule with the same name as this header file.
SmallString<32> NameBuf;
StringRef Name = sanitizeFilenameAsIdentifier(
llvm::sys::path::stem(Header->getName()),
NameBuf);
Found = lookupModuleQualified(Name, Found);
if (!Found)
return false;
}
return IsUnavailable(Found);
}
SkippedDirs.push_back(Dir);
// Retrieve our parent path.
DirName = llvm::sys::path::parent_path(DirName);
if (DirName.empty())
break;
// Resolve the parent path to a directory entry.
Dir = SourceMgr.getFileManager().getDirectory(DirName);
} while (Dir);
return false;
}
Module *ModuleMap::findModule(StringRef Name) const {
llvm::StringMap<Module *>::const_iterator Known = Modules.find(Name);
if (Known != Modules.end())
return Known->getValue();
return nullptr;
}
Module *ModuleMap::lookupModuleUnqualified(StringRef Name,
Module *Context) const {
for(; Context; Context = Context->Parent) {
if (Module *Sub = lookupModuleQualified(Name, Context))
return Sub;
}
return findModule(Name);
}
Module *ModuleMap::lookupModuleQualified(StringRef Name, Module *Context) const{
if (!Context)
return findModule(Name);
return Context->findSubmodule(Name);
}
std::pair<Module *, bool>
ModuleMap::findOrCreateModule(StringRef Name, Module *Parent, bool IsFramework,
bool IsExplicit) {
// Try to find an existing module with this name.
if (Module *Sub = lookupModuleQualified(Name, Parent))
return std::make_pair(Sub, false);
// Create a new module with this name.
Module *Result = new Module(Name, SourceLocation(), Parent,
IsFramework, IsExplicit, NumCreatedModules++);
if (LangOpts.CurrentModule == Name) {
SourceModule = Result;
SourceModuleName = Name;
}
if (!Parent) {
Modules[Name] = Result;
if (!LangOpts.CurrentModule.empty() && !CompilingModule &&
Name == LangOpts.CurrentModule) {
CompilingModule = Result;
}
}
return std::make_pair(Result, true);
}
/// \brief For a framework module, infer the framework against which we
/// should link.
static void inferFrameworkLink(Module *Mod, const DirectoryEntry *FrameworkDir,
FileManager &FileMgr) {
assert(Mod->IsFramework && "Can only infer linking for framework modules");
assert(!Mod->isSubFramework() &&
"Can only infer linking for top-level frameworks");
SmallString<128> LibName;
LibName += FrameworkDir->getName();
llvm::sys::path::append(LibName, Mod->Name);
// The library name of a framework has more than one possible extension since
// the introduction of the text-based dynamic library format. We need to check
// for both before we give up.
static const char *frameworkExtensions[] = {"", ".tbd"};
for (const auto *extension : frameworkExtensions) {
llvm::sys::path::replace_extension(LibName, extension);
if (FileMgr.getFile(LibName)) {
Mod->LinkLibraries.push_back(Module::LinkLibrary(Mod->Name,
/*IsFramework=*/true));
return;
}
}
}
Module *ModuleMap::inferFrameworkModule(const DirectoryEntry *FrameworkDir,
bool IsSystem, Module *Parent) {
Attributes Attrs;
Attrs.IsSystem = IsSystem;
return inferFrameworkModule(FrameworkDir, Attrs, Parent);
}
Module *ModuleMap::inferFrameworkModule(const DirectoryEntry *FrameworkDir,
Attributes Attrs, Module *Parent) {
// Note: as an egregious but useful hack we use the real path here, because
// we might be looking at an embedded framework that symlinks out to a
// top-level framework, and we need to infer as if we were naming the
// top-level framework.
StringRef FrameworkDirName =
SourceMgr.getFileManager().getCanonicalName(FrameworkDir);
// In case this is a case-insensitive filesystem, use the canonical
// directory name as the ModuleName, since modules are case-sensitive.
// FIXME: we should be able to give a fix-it hint for the correct spelling.
SmallString<32> ModuleNameStorage;
StringRef ModuleName = sanitizeFilenameAsIdentifier(
llvm::sys::path::stem(FrameworkDirName), ModuleNameStorage);
// Check whether we've already found this module.
if (Module *Mod = lookupModuleQualified(ModuleName, Parent))
return Mod;
FileManager &FileMgr = SourceMgr.getFileManager();
// If the framework has a parent path from which we're allowed to infer
// a framework module, do so.
const FileEntry *ModuleMapFile = nullptr;
if (!Parent) {
// Determine whether we're allowed to infer a module map.
bool canInfer = false;
if (llvm::sys::path::has_parent_path(FrameworkDirName)) {
// Figure out the parent path.
StringRef Parent = llvm::sys::path::parent_path(FrameworkDirName);
if (const DirectoryEntry *ParentDir = FileMgr.getDirectory(Parent)) {
// Check whether we have already looked into the parent directory
// for a module map.
llvm::DenseMap<const DirectoryEntry *, InferredDirectory>::const_iterator
inferred = InferredDirectories.find(ParentDir);
if (inferred == InferredDirectories.end()) {
// We haven't looked here before. Load a module map, if there is
// one.
bool IsFrameworkDir = Parent.endswith(".framework");
if (const FileEntry *ModMapFile =
HeaderInfo.lookupModuleMapFile(ParentDir, IsFrameworkDir)) {
parseModuleMapFile(ModMapFile, Attrs.IsSystem, ParentDir);
inferred = InferredDirectories.find(ParentDir);
}
if (inferred == InferredDirectories.end())
inferred = InferredDirectories.insert(
std::make_pair(ParentDir, InferredDirectory())).first;
}
if (inferred->second.InferModules) {
// We're allowed to infer for this directory, but make sure it's okay
// to infer this particular module.
StringRef Name = llvm::sys::path::stem(FrameworkDirName);
canInfer = std::find(inferred->second.ExcludedModules.begin(),
inferred->second.ExcludedModules.end(),
Name) == inferred->second.ExcludedModules.end();
Attrs.IsSystem |= inferred->second.Attrs.IsSystem;
Attrs.IsExternC |= inferred->second.Attrs.IsExternC;
Attrs.IsExhaustive |= inferred->second.Attrs.IsExhaustive;
ModuleMapFile = inferred->second.ModuleMapFile;
}
}
}
// If we're not allowed to infer a framework module, don't.
if (!canInfer)
return nullptr;
} else
ModuleMapFile = getModuleMapFileForUniquing(Parent);
// Look for an umbrella header.
SmallString<128> UmbrellaName = StringRef(FrameworkDir->getName());
llvm::sys::path::append(UmbrellaName, "Headers", ModuleName + ".h");
const FileEntry *UmbrellaHeader = FileMgr.getFile(UmbrellaName);
// FIXME: If there's no umbrella header, we could probably scan the
// framework to load *everything*. But, it's not clear that this is a good
// idea.
if (!UmbrellaHeader)
return nullptr;
Module *Result = new Module(ModuleName, SourceLocation(), Parent,
/*IsFramework=*/true, /*IsExplicit=*/false,
NumCreatedModules++);
InferredModuleAllowedBy[Result] = ModuleMapFile;
Result->IsInferred = true;
if (LangOpts.CurrentModule == ModuleName) {
SourceModule = Result;
SourceModuleName = ModuleName;
}
Result->IsSystem |= Attrs.IsSystem;
Result->IsExternC |= Attrs.IsExternC;
Result->ConfigMacrosExhaustive |= Attrs.IsExhaustive;
Result->Directory = FrameworkDir;
if (!Parent)
Modules[ModuleName] = Result;
// umbrella header "umbrella-header-name"
//
// The "Headers/" component of the name is implied because this is
// a framework module.
setUmbrellaHeader(Result, UmbrellaHeader, ModuleName + ".h");
// export *
Result->Exports.push_back(Module::ExportDecl(nullptr, true));
// module * { export * }
Result->InferSubmodules = true;
Result->InferExportWildcard = true;
// Look for subframeworks.
std::error_code EC;
SmallString<128> SubframeworksDirName
= StringRef(FrameworkDir->getName());
llvm::sys::path::append(SubframeworksDirName, "Frameworks");
llvm::sys::path::native(SubframeworksDirName);
for (llvm::sys::fs::directory_iterator Dir(SubframeworksDirName, EC), DirEnd;
Dir != DirEnd && !EC; Dir.increment(EC)) {
if (!StringRef(Dir->path()).endswith(".framework"))
continue;
if (const DirectoryEntry *SubframeworkDir
= FileMgr.getDirectory(Dir->path())) {
// Note: as an egregious but useful hack, we use the real path here and
// check whether it is actually a subdirectory of the parent directory.
// This will not be the case if the 'subframework' is actually a symlink
// out to a top-level framework.
StringRef SubframeworkDirName = FileMgr.getCanonicalName(SubframeworkDir);
bool FoundParent = false;
do {
// Get the parent directory name.
SubframeworkDirName
= llvm::sys::path::parent_path(SubframeworkDirName);
if (SubframeworkDirName.empty())
break;
if (FileMgr.getDirectory(SubframeworkDirName) == FrameworkDir) {
FoundParent = true;
break;
}
} while (true);
if (!FoundParent)
continue;
// FIXME: Do we want to warn about subframeworks without umbrella headers?
inferFrameworkModule(SubframeworkDir, Attrs, Result);
}
}
// If the module is a top-level framework, automatically link against the
// framework.
if (!Result->isSubFramework()) {
inferFrameworkLink(Result, FrameworkDir, FileMgr);
}
return Result;
}
void ModuleMap::setUmbrellaHeader(Module *Mod, const FileEntry *UmbrellaHeader,
Twine NameAsWritten) {
Headers[UmbrellaHeader].push_back(KnownHeader(Mod, NormalHeader));
Mod->Umbrella = UmbrellaHeader;
Mod->UmbrellaAsWritten = NameAsWritten.str();
UmbrellaDirs[UmbrellaHeader->getDir()] = Mod;
}
void ModuleMap::setUmbrellaDir(Module *Mod, const DirectoryEntry *UmbrellaDir,
Twine NameAsWritten) {
Mod->Umbrella = UmbrellaDir;
Mod->UmbrellaAsWritten = NameAsWritten.str();
UmbrellaDirs[UmbrellaDir] = Mod;
}
static Module::HeaderKind headerRoleToKind(ModuleMap::ModuleHeaderRole Role) {
switch ((int)Role) {
default: llvm_unreachable("unknown header role");
case ModuleMap::NormalHeader:
return Module::HK_Normal;
case ModuleMap::PrivateHeader:
return Module::HK_Private;
case ModuleMap::TextualHeader:
return Module::HK_Textual;
case ModuleMap::PrivateHeader | ModuleMap::TextualHeader:
return Module::HK_PrivateTextual;
}
}
void ModuleMap::addHeader(Module *Mod, Module::Header Header,
ModuleHeaderRole Role, bool Imported) {
KnownHeader KH(Mod, Role);
// Only add each header to the headers list once.
// FIXME: Should we diagnose if a header is listed twice in the
// same module definition?
auto &HeaderList = Headers[Header.Entry];
for (auto H : HeaderList)
if (H == KH)
return;
HeaderList.push_back(KH);
Mod->Headers[headerRoleToKind(Role)].push_back(std::move(Header));
bool isCompilingModuleHeader = Mod->getTopLevelModule() == CompilingModule;
if (!Imported || isCompilingModuleHeader) {
// When we import HeaderFileInfo, the external source is expected to
// set the isModuleHeader flag itself.
HeaderInfo.MarkFileModuleHeader(Header.Entry, Role,
isCompilingModuleHeader);
}
}
void ModuleMap::excludeHeader(Module *Mod, Module::Header Header) {
// Add this as a known header so we won't implicitly add it to any
// umbrella directory module.
// FIXME: Should we only exclude it from umbrella modules within the
// specified module?
(void) Headers[Header.Entry];
Mod->Headers[Module::HK_Excluded].push_back(std::move(Header));
}
const FileEntry *
ModuleMap::getContainingModuleMapFile(const Module *Module) const {
if (Module->DefinitionLoc.isInvalid())
return nullptr;
return SourceMgr.getFileEntryForID(
SourceMgr.getFileID(Module->DefinitionLoc));
}
const FileEntry *ModuleMap::getModuleMapFileForUniquing(const Module *M) const {
if (M->IsInferred) {
assert(InferredModuleAllowedBy.count(M) && "missing inferred module map");
return InferredModuleAllowedBy.find(M)->second;
}
return getContainingModuleMapFile(M);
}
void ModuleMap::setInferredModuleAllowedBy(Module *M, const FileEntry *ModMap) {
assert(M->IsInferred && "module not inferred");
InferredModuleAllowedBy[M] = ModMap;
}
void ModuleMap::dump() {
llvm::errs() << "Modules:";
for (llvm::StringMap<Module *>::iterator M = Modules.begin(),
MEnd = Modules.end();
M != MEnd; ++M)
M->getValue()->print(llvm::errs(), 2);
llvm::errs() << "Headers:";
for (HeadersMap::iterator H = Headers.begin(), HEnd = Headers.end();
H != HEnd; ++H) {
llvm::errs() << " \"" << H->first->getName() << "\" -> ";
for (SmallVectorImpl<KnownHeader>::const_iterator I = H->second.begin(),
E = H->second.end();
I != E; ++I) {
if (I != H->second.begin())
llvm::errs() << ",";
llvm::errs() << I->getModule()->getFullModuleName();
}
llvm::errs() << "\n";
}
}
bool ModuleMap::resolveExports(Module *Mod, bool Complain) {
auto Unresolved = std::move(Mod->UnresolvedExports);
Mod->UnresolvedExports.clear();
for (auto &UE : Unresolved) {
Module::ExportDecl Export = resolveExport(Mod, UE, Complain);
if (Export.getPointer() || Export.getInt())
Mod->Exports.push_back(Export);
else
Mod->UnresolvedExports.push_back(UE);
}
return !Mod->UnresolvedExports.empty();
}
bool ModuleMap::resolveUses(Module *Mod, bool Complain) {
auto Unresolved = std::move(Mod->UnresolvedDirectUses);
Mod->UnresolvedDirectUses.clear();
for (auto &UDU : Unresolved) {
Module *DirectUse = resolveModuleId(UDU, Mod, Complain);
if (DirectUse)
Mod->DirectUses.push_back(DirectUse);
else
Mod->UnresolvedDirectUses.push_back(UDU);
}
return !Mod->UnresolvedDirectUses.empty();
}
bool ModuleMap::resolveConflicts(Module *Mod, bool Complain) {
auto Unresolved = std::move(Mod->UnresolvedConflicts);
Mod->UnresolvedConflicts.clear();
for (auto &UC : Unresolved) {
if (Module *OtherMod = resolveModuleId(UC.Id, Mod, Complain)) {
Module::Conflict Conflict;
Conflict.Other = OtherMod;
Conflict.Message = UC.Message;
Mod->Conflicts.push_back(Conflict);
} else
Mod->UnresolvedConflicts.push_back(UC);
}
return !Mod->UnresolvedConflicts.empty();
}
Module *ModuleMap::inferModuleFromLocation(FullSourceLoc Loc) {
if (Loc.isInvalid())
return nullptr;
// Use the expansion location to determine which module we're in.
FullSourceLoc ExpansionLoc = Loc.getExpansionLoc();
if (!ExpansionLoc.isFileID())
return nullptr;
const SourceManager &SrcMgr = Loc.getManager();
FileID ExpansionFileID = ExpansionLoc.getFileID();
while (const FileEntry *ExpansionFile
= SrcMgr.getFileEntryForID(ExpansionFileID)) {
// Find the module that owns this header (if any).
if (Module *Mod = findModuleForHeader(ExpansionFile).getModule())
return Mod;
// No module owns this header, so look up the inclusion chain to see if
// any included header has an associated module.
SourceLocation IncludeLoc = SrcMgr.getIncludeLoc(ExpansionFileID);
if (IncludeLoc.isInvalid())
return nullptr;
ExpansionFileID = SrcMgr.getFileID(IncludeLoc);
}
return nullptr;
}
//----------------------------------------------------------------------------//
// Module map file parser
//----------------------------------------------------------------------------//
namespace clang {
/// \brief A token in a module map file.
struct MMToken {
enum TokenKind {
Comma,
ConfigMacros,
Conflict,
EndOfFile,
HeaderKeyword,
Identifier,
Exclaim,
ExcludeKeyword,
ExplicitKeyword,
ExportKeyword,
ExternKeyword,
FrameworkKeyword,
LinkKeyword,
ModuleKeyword,
Period,
PrivateKeyword,
UmbrellaKeyword,
UseKeyword,
RequiresKeyword,
Star,
StringLiteral,
TextualKeyword,
LBrace,
RBrace,
LSquare,
RSquare
} Kind;
unsigned Location;
unsigned StringLength;
const char *StringData;
void clear() {
Kind = EndOfFile;
Location = 0;
StringLength = 0;
StringData = nullptr;
}
bool is(TokenKind K) const { return Kind == K; }
SourceLocation getLocation() const {
return SourceLocation::getFromRawEncoding(Location);
}
StringRef getString() const {
return StringRef(StringData, StringLength);
}
};
class ModuleMapParser {
Lexer &L;
SourceManager &SourceMgr;
/// \brief Default target information, used only for string literal
/// parsing.
const TargetInfo *Target;
DiagnosticsEngine &Diags;
ModuleMap ⤅
/// \brief The current module map file.
const FileEntry *ModuleMapFile;
/// \brief The directory that file names in this module map file should
/// be resolved relative to.
const DirectoryEntry *Directory;
/// \brief The directory containing Clang-supplied headers.
const DirectoryEntry *BuiltinIncludeDir;
/// \brief Whether this module map is in a system header directory.
bool IsSystem;
/// \brief Whether an error occurred.
bool HadError;
/// \brief Stores string data for the various string literals referenced
/// during parsing.
llvm::BumpPtrAllocator StringData;
/// \brief The current token.
MMToken Tok;
/// \brief The active module.
Module *ActiveModule;
/// \brief Whether a module uses the 'requires excluded' hack to mark its
/// contents as 'textual'.
///
/// On older Darwin SDK versions, 'requires excluded' is used to mark the
/// contents of the Darwin.C.excluded (assert.h) and Tcl.Private modules as
/// non-modular headers. For backwards compatibility, we continue to
/// support this idiom for just these modules, and map the headers to
/// 'textual' to match the original intent.
llvm::SmallPtrSet<Module *, 2> UsesRequiresExcludedHack;
/// \brief Consume the current token and return its location.
SourceLocation consumeToken();
/// \brief Skip tokens until we reach the a token with the given kind
/// (or the end of the file).
void skipUntil(MMToken::TokenKind K);
typedef SmallVector<std::pair<std::string, SourceLocation>, 2> ModuleId;
bool parseModuleId(ModuleId &Id);
void parseModuleDecl();
void parseExternModuleDecl();
void parseRequiresDecl();
void parseHeaderDecl(clang::MMToken::TokenKind,
SourceLocation LeadingLoc);
void parseUmbrellaDirDecl(SourceLocation UmbrellaLoc);
void parseExportDecl();
void parseUseDecl();
void parseLinkDecl();
void parseConfigMacros();
void parseConflict();
void parseInferredModuleDecl(bool Framework, bool Explicit);
typedef ModuleMap::Attributes Attributes;
bool parseOptionalAttributes(Attributes &Attrs);
public:
explicit ModuleMapParser(Lexer &L, SourceManager &SourceMgr,
const TargetInfo *Target,
DiagnosticsEngine &Diags,
ModuleMap &Map,
const FileEntry *ModuleMapFile,
const DirectoryEntry *Directory,
const DirectoryEntry *BuiltinIncludeDir,
bool IsSystem)
: L(L), SourceMgr(SourceMgr), Target(Target), Diags(Diags), Map(Map),
ModuleMapFile(ModuleMapFile), Directory(Directory),
BuiltinIncludeDir(BuiltinIncludeDir), IsSystem(IsSystem),
HadError(false), ActiveModule(nullptr)
{
Tok.clear();
consumeToken();
}
bool parseModuleMapFile();
};
}
SourceLocation ModuleMapParser::consumeToken() {
retry:
SourceLocation Result = Tok.getLocation();
Tok.clear();
Token LToken;
L.LexFromRawLexer(LToken);
Tok.Location = LToken.getLocation().getRawEncoding();
switch (LToken.getKind()) {
case tok::raw_identifier: {
StringRef RI = LToken.getRawIdentifier();
Tok.StringData = RI.data();
Tok.StringLength = RI.size();
Tok.Kind = llvm::StringSwitch<MMToken::TokenKind>(RI)
.Case("config_macros", MMToken::ConfigMacros)
.Case("conflict", MMToken::Conflict)
.Case("exclude", MMToken::ExcludeKeyword)
.Case("explicit", MMToken::ExplicitKeyword)
.Case("export", MMToken::ExportKeyword)
.Case("extern", MMToken::ExternKeyword)
.Case("framework", MMToken::FrameworkKeyword)
.Case("header", MMToken::HeaderKeyword)
.Case("link", MMToken::LinkKeyword)
.Case("module", MMToken::ModuleKeyword)
.Case("private", MMToken::PrivateKeyword)
.Case("requires", MMToken::RequiresKeyword)
.Case("textual", MMToken::TextualKeyword)
.Case("umbrella", MMToken::UmbrellaKeyword)
.Case("use", MMToken::UseKeyword)
.Default(MMToken::Identifier);
break;
}
case tok::comma:
Tok.Kind = MMToken::Comma;
break;
case tok::eof:
Tok.Kind = MMToken::EndOfFile;
break;
case tok::l_brace:
Tok.Kind = MMToken::LBrace;
break;
case tok::l_square:
Tok.Kind = MMToken::LSquare;
break;
case tok::period:
Tok.Kind = MMToken::Period;
break;
case tok::r_brace:
Tok.Kind = MMToken::RBrace;
break;
case tok::r_square:
Tok.Kind = MMToken::RSquare;
break;
case tok::star:
Tok.Kind = MMToken::Star;
break;
case tok::exclaim:
Tok.Kind = MMToken::Exclaim;
break;
case tok::string_literal: {
if (LToken.hasUDSuffix()) {
Diags.Report(LToken.getLocation(), diag::err_invalid_string_udl);
HadError = true;
goto retry;
}
// Parse the string literal.
LangOptions LangOpts;
StringLiteralParser StringLiteral(LToken, SourceMgr, LangOpts, *Target);
if (StringLiteral.hadError)
goto retry;
// Copy the string literal into our string data allocator.
unsigned Length = StringLiteral.GetStringLength();
char *Saved = StringData.Allocate<char>(Length + 1);
memcpy(Saved, StringLiteral.GetString().data(), Length);
Saved[Length] = 0;
// Form the token.
Tok.Kind = MMToken::StringLiteral;
Tok.StringData = Saved;
Tok.StringLength = Length;
break;
}
case tok::comment:
goto retry;
default:
Diags.Report(LToken.getLocation(), diag::err_mmap_unknown_token);
HadError = true;
goto retry;
}
return Result;
}
void ModuleMapParser::skipUntil(MMToken::TokenKind K) {
unsigned braceDepth = 0;
unsigned squareDepth = 0;
do {
switch (Tok.Kind) {
case MMToken::EndOfFile:
return;
case MMToken::LBrace:
if (Tok.is(K) && braceDepth == 0 && squareDepth == 0)
return;
++braceDepth;
break;
case MMToken::LSquare:
if (Tok.is(K) && braceDepth == 0 && squareDepth == 0)
return;
++squareDepth;
break;
case MMToken::RBrace:
if (braceDepth > 0)
--braceDepth;
else if (Tok.is(K))
return;
break;
case MMToken::RSquare:
if (squareDepth > 0)
--squareDepth;
else if (Tok.is(K))
return;
break;
default:
if (braceDepth == 0 && squareDepth == 0 && Tok.is(K))
return;
break;
}
consumeToken();
} while (true);
}
/// \brief Parse a module-id.
///
/// module-id:
/// identifier
/// identifier '.' module-id
///
/// \returns true if an error occurred, false otherwise.
bool ModuleMapParser::parseModuleId(ModuleId &Id) {
Id.clear();
do {
if (Tok.is(MMToken::Identifier) || Tok.is(MMToken::StringLiteral)) {
Id.push_back(std::make_pair(Tok.getString(), Tok.getLocation()));
consumeToken();
} else {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_module_name);
return true;
}
if (!Tok.is(MMToken::Period))
break;
consumeToken();
} while (true);
return false;
}
namespace {
/// \brief Enumerates the known attributes.
enum AttributeKind {
/// \brief An unknown attribute.
AT_unknown,
/// \brief The 'system' attribute.
AT_system,
/// \brief The 'extern_c' attribute.
AT_extern_c,
/// \brief The 'exhaustive' attribute.
AT_exhaustive
};
}
/// \brief Parse a module declaration.
///
/// module-declaration:
/// 'extern' 'module' module-id string-literal
/// 'explicit'[opt] 'framework'[opt] 'module' module-id attributes[opt]
/// { module-member* }
///
/// module-member:
/// requires-declaration
/// header-declaration
/// submodule-declaration
/// export-declaration
/// link-declaration
///
/// submodule-declaration:
/// module-declaration
/// inferred-submodule-declaration
void ModuleMapParser::parseModuleDecl() {
assert(Tok.is(MMToken::ExplicitKeyword) || Tok.is(MMToken::ModuleKeyword) ||
Tok.is(MMToken::FrameworkKeyword) || Tok.is(MMToken::ExternKeyword));
if (Tok.is(MMToken::ExternKeyword)) {
parseExternModuleDecl();
return;
}
// Parse 'explicit' or 'framework' keyword, if present.
SourceLocation ExplicitLoc;
bool Explicit = false;
bool Framework = false;
// Parse 'explicit' keyword, if present.
if (Tok.is(MMToken::ExplicitKeyword)) {
ExplicitLoc = consumeToken();
Explicit = true;
}
// Parse 'framework' keyword, if present.
if (Tok.is(MMToken::FrameworkKeyword)) {
consumeToken();
Framework = true;
}
// Parse 'module' keyword.
if (!Tok.is(MMToken::ModuleKeyword)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_module);
consumeToken();
HadError = true;
return;
}
consumeToken(); // 'module' keyword
// If we have a wildcard for the module name, this is an inferred submodule.
// Parse it.
if (Tok.is(MMToken::Star))
return parseInferredModuleDecl(Framework, Explicit);
// Parse the module name.
ModuleId Id;
if (parseModuleId(Id)) {
HadError = true;
return;
}
if (ActiveModule) {
if (Id.size() > 1) {
Diags.Report(Id.front().second, diag::err_mmap_nested_submodule_id)
<< SourceRange(Id.front().second, Id.back().second);
HadError = true;
return;
}
} else if (Id.size() == 1 && Explicit) {
// Top-level modules can't be explicit.
Diags.Report(ExplicitLoc, diag::err_mmap_explicit_top_level);
Explicit = false;
ExplicitLoc = SourceLocation();
HadError = true;
}
Module *PreviousActiveModule = ActiveModule;
if (Id.size() > 1) {
// This module map defines a submodule. Go find the module of which it
// is a submodule.
ActiveModule = nullptr;
const Module *TopLevelModule = nullptr;
for (unsigned I = 0, N = Id.size() - 1; I != N; ++I) {
if (Module *Next = Map.lookupModuleQualified(Id[I].first, ActiveModule)) {
if (I == 0)
TopLevelModule = Next;
ActiveModule = Next;
continue;
}
if (ActiveModule) {
Diags.Report(Id[I].second, diag::err_mmap_missing_module_qualified)
<< Id[I].first
<< ActiveModule->getTopLevelModule()->getFullModuleName();
} else {
Diags.Report(Id[I].second, diag::err_mmap_expected_module_name);
}
HadError = true;
return;
}
if (ModuleMapFile != Map.getContainingModuleMapFile(TopLevelModule)) {
assert(ModuleMapFile != Map.getModuleMapFileForUniquing(TopLevelModule) &&
"submodule defined in same file as 'module *' that allowed its "
"top-level module");
Map.addAdditionalModuleMapFile(TopLevelModule, ModuleMapFile);
}
}
StringRef ModuleName = Id.back().first;
SourceLocation ModuleNameLoc = Id.back().second;
// Parse the optional attribute list.
Attributes Attrs;
parseOptionalAttributes(Attrs);
// Parse the opening brace.
if (!Tok.is(MMToken::LBrace)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_lbrace)
<< ModuleName;
HadError = true;
return;
}
SourceLocation LBraceLoc = consumeToken();
// Determine whether this (sub)module has already been defined.
if (Module *Existing = Map.lookupModuleQualified(ModuleName, ActiveModule)) {
if (Existing->DefinitionLoc.isInvalid() && !ActiveModule) {
// Skip the module definition.
skipUntil(MMToken::RBrace);
if (Tok.is(MMToken::RBrace))
consumeToken();
else {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_rbrace);
Diags.Report(LBraceLoc, diag::note_mmap_lbrace_match);
HadError = true;
}
return;
}
Diags.Report(ModuleNameLoc, diag::err_mmap_module_redefinition)
<< ModuleName;
Diags.Report(Existing->DefinitionLoc, diag::note_mmap_prev_definition);
// Skip the module definition.
skipUntil(MMToken::RBrace);
if (Tok.is(MMToken::RBrace))
consumeToken();
HadError = true;
return;
}
// Start defining this module.
ActiveModule = Map.findOrCreateModule(ModuleName, ActiveModule, Framework,
Explicit).first;
ActiveModule->DefinitionLoc = ModuleNameLoc;
if (Attrs.IsSystem || IsSystem)
ActiveModule->IsSystem = true;
if (Attrs.IsExternC)
ActiveModule->IsExternC = true;
ActiveModule->Directory = Directory;
bool Done = false;
do {
switch (Tok.Kind) {
case MMToken::EndOfFile:
case MMToken::RBrace:
Done = true;
break;
case MMToken::ConfigMacros:
parseConfigMacros();
break;
case MMToken::Conflict:
parseConflict();
break;
case MMToken::ExplicitKeyword:
case MMToken::ExternKeyword:
case MMToken::FrameworkKeyword:
case MMToken::ModuleKeyword:
parseModuleDecl();
break;
case MMToken::ExportKeyword:
parseExportDecl();
break;
case MMToken::UseKeyword:
parseUseDecl();
break;
case MMToken::RequiresKeyword:
parseRequiresDecl();
break;
case MMToken::TextualKeyword:
parseHeaderDecl(MMToken::TextualKeyword, consumeToken());
break;
case MMToken::UmbrellaKeyword: {
SourceLocation UmbrellaLoc = consumeToken();
if (Tok.is(MMToken::HeaderKeyword))
parseHeaderDecl(MMToken::UmbrellaKeyword, UmbrellaLoc);
else
parseUmbrellaDirDecl(UmbrellaLoc);
break;
}
case MMToken::ExcludeKeyword:
parseHeaderDecl(MMToken::ExcludeKeyword, consumeToken());
break;
case MMToken::PrivateKeyword:
parseHeaderDecl(MMToken::PrivateKeyword, consumeToken());
break;
case MMToken::HeaderKeyword:
parseHeaderDecl(MMToken::HeaderKeyword, consumeToken());
break;
case MMToken::LinkKeyword:
parseLinkDecl();
break;
default:
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_member);
consumeToken();
break;
}
} while (!Done);
if (Tok.is(MMToken::RBrace))
consumeToken();
else {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_rbrace);
Diags.Report(LBraceLoc, diag::note_mmap_lbrace_match);
HadError = true;
}
// If the active module is a top-level framework, and there are no link
// libraries, automatically link against the framework.
if (ActiveModule->IsFramework && !ActiveModule->isSubFramework() &&
ActiveModule->LinkLibraries.empty()) {
inferFrameworkLink(ActiveModule, Directory, SourceMgr.getFileManager());
}
// If the module meets all requirements but is still unavailable, mark the
// whole tree as unavailable to prevent it from building.
if (!ActiveModule->IsAvailable && !ActiveModule->IsMissingRequirement &&
ActiveModule->Parent) {
ActiveModule->getTopLevelModule()->markUnavailable();
ActiveModule->getTopLevelModule()->MissingHeaders.append(
ActiveModule->MissingHeaders.begin(), ActiveModule->MissingHeaders.end());
}
// We're done parsing this module. Pop back to the previous module.
ActiveModule = PreviousActiveModule;
}
/// \brief Parse an extern module declaration.
///
/// extern module-declaration:
/// 'extern' 'module' module-id string-literal
void ModuleMapParser::parseExternModuleDecl() {
assert(Tok.is(MMToken::ExternKeyword));
SourceLocation ExternLoc = consumeToken(); // 'extern' keyword
// Parse 'module' keyword.
if (!Tok.is(MMToken::ModuleKeyword)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_module);
consumeToken();
HadError = true;
return;
}
consumeToken(); // 'module' keyword
// Parse the module name.
ModuleId Id;
if (parseModuleId(Id)) {
HadError = true;
return;
}
// Parse the referenced module map file name.
if (!Tok.is(MMToken::StringLiteral)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_mmap_file);
HadError = true;
return;
}
std::string FileName = Tok.getString();
consumeToken(); // filename
StringRef FileNameRef = FileName;
SmallString<128> ModuleMapFileName;
if (llvm::sys::path::is_relative(FileNameRef)) {
ModuleMapFileName += Directory->getName();
llvm::sys::path::append(ModuleMapFileName, FileName);
FileNameRef = ModuleMapFileName;
}
if (const FileEntry *File = SourceMgr.getFileManager().getFile(FileNameRef))
Map.parseModuleMapFile(
File, /*IsSystem=*/false,
Map.HeaderInfo.getHeaderSearchOpts().ModuleMapFileHomeIsCwd
? Directory
: File->getDir(), ExternLoc);
}
/// Whether to add the requirement \p Feature to the module \p M.
///
/// This preserves backwards compatibility for two hacks in the Darwin system
/// module map files:
///
/// 1. The use of 'requires excluded' to make headers non-modular, which
/// should really be mapped to 'textual' now that we have this feature. We
/// drop the 'excluded' requirement, and set \p IsRequiresExcludedHack to
/// true. Later, this bit will be used to map all the headers inside this
/// module to 'textual'.
///
/// This affects Darwin.C.excluded (for assert.h) and Tcl.Private.
///
/// 2. Removes a bogus cplusplus requirement from IOKit.avc. This requirement
/// was never correct and causes issues now that we check it, so drop it.
static bool shouldAddRequirement(Module *M, StringRef Feature,
bool &IsRequiresExcludedHack) {
static const StringRef DarwinCExcluded[] = {"Darwin", "C", "excluded"};
static const StringRef TclPrivate[] = {"Tcl", "Private"};
static const StringRef IOKitAVC[] = {"IOKit", "avc"};
if (Feature == "excluded" && (M->fullModuleNameIs(DarwinCExcluded) ||
M->fullModuleNameIs(TclPrivate))) {
IsRequiresExcludedHack = true;
return false;
} else if (Feature == "cplusplus" && M->fullModuleNameIs(IOKitAVC)) {
return false;
}
return true;
}
/// \brief Parse a requires declaration.
///
/// requires-declaration:
/// 'requires' feature-list
///
/// feature-list:
/// feature ',' feature-list
/// feature
///
/// feature:
/// '!'[opt] identifier
void ModuleMapParser::parseRequiresDecl() {
assert(Tok.is(MMToken::RequiresKeyword));
// Parse 'requires' keyword.
consumeToken();
// Parse the feature-list.
do {
bool RequiredState = true;
if (Tok.is(MMToken::Exclaim)) {
RequiredState = false;
consumeToken();
}
if (!Tok.is(MMToken::Identifier)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_feature);
HadError = true;
return;
}
// Consume the feature name.
std::string Feature = Tok.getString();
consumeToken();
bool IsRequiresExcludedHack = false;
bool ShouldAddRequirement =
shouldAddRequirement(ActiveModule, Feature, IsRequiresExcludedHack);
if (IsRequiresExcludedHack)
UsesRequiresExcludedHack.insert(ActiveModule);
if (ShouldAddRequirement) {
// Add this feature.
ActiveModule->addRequirement(Feature, RequiredState, Map.LangOpts,
*Map.Target);
}
if (!Tok.is(MMToken::Comma))
break;
// Consume the comma.
consumeToken();
} while (true);
}
/// \brief Append to \p Paths the set of paths needed to get to the
/// subframework in which the given module lives.
static void appendSubframeworkPaths(Module *Mod,
SmallVectorImpl<char> &Path) {
// Collect the framework names from the given module to the top-level module.
SmallVector<StringRef, 2> Paths;
for (; Mod; Mod = Mod->Parent) {
if (Mod->IsFramework)
Paths.push_back(Mod->Name);
}
if (Paths.empty())
return;
// Add Frameworks/Name.framework for each subframework.
for (unsigned I = Paths.size() - 1; I != 0; --I)
llvm::sys::path::append(Path, "Frameworks", Paths[I-1] + ".framework");
}
/// \brief Parse a header declaration.
///
/// header-declaration:
/// 'textual'[opt] 'header' string-literal
/// 'private' 'textual'[opt] 'header' string-literal
/// 'exclude' 'header' string-literal
/// 'umbrella' 'header' string-literal
///
/// FIXME: Support 'private textual header'.
void ModuleMapParser::parseHeaderDecl(MMToken::TokenKind LeadingToken,
SourceLocation LeadingLoc) {
// We've already consumed the first token.
ModuleMap::ModuleHeaderRole Role = ModuleMap::NormalHeader;
if (LeadingToken == MMToken::PrivateKeyword) {
Role = ModuleMap::PrivateHeader;
// 'private' may optionally be followed by 'textual'.
if (Tok.is(MMToken::TextualKeyword)) {
LeadingToken = Tok.Kind;
consumeToken();
}
}
if (LeadingToken == MMToken::TextualKeyword)
Role = ModuleMap::ModuleHeaderRole(Role | ModuleMap::TextualHeader);
if (UsesRequiresExcludedHack.count(ActiveModule)) {
// Mark this header 'textual' (see doc comment for
// Module::UsesRequiresExcludedHack).
Role = ModuleMap::ModuleHeaderRole(Role | ModuleMap::TextualHeader);
}
if (LeadingToken != MMToken::HeaderKeyword) {
if (!Tok.is(MMToken::HeaderKeyword)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_header)
<< (LeadingToken == MMToken::PrivateKeyword ? "private" :
LeadingToken == MMToken::ExcludeKeyword ? "exclude" :
LeadingToken == MMToken::TextualKeyword ? "textual" : "umbrella");
return;
}
consumeToken();
}
// Parse the header name.
if (!Tok.is(MMToken::StringLiteral)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_header)
<< "header";
HadError = true;
return;
}
Module::UnresolvedHeaderDirective Header;
Header.FileName = Tok.getString();
Header.FileNameLoc = consumeToken();
// Check whether we already have an umbrella.
if (LeadingToken == MMToken::UmbrellaKeyword && ActiveModule->Umbrella) {
Diags.Report(Header.FileNameLoc, diag::err_mmap_umbrella_clash)
<< ActiveModule->getFullModuleName();
HadError = true;
return;
}
// Look for this file.
const FileEntry *File = nullptr;
const FileEntry *BuiltinFile = nullptr;
SmallString<128> RelativePathName;
if (llvm::sys::path::is_absolute(Header.FileName)) {
RelativePathName = Header.FileName;
File = SourceMgr.getFileManager().getFile(RelativePathName);
} else {
// Search for the header file within the search directory.
SmallString<128> FullPathName(Directory->getName());
unsigned FullPathLength = FullPathName.size();
if (ActiveModule->isPartOfFramework()) {
appendSubframeworkPaths(ActiveModule, RelativePathName);
// Check whether this file is in the public headers.
llvm::sys::path::append(RelativePathName, "Headers", Header.FileName);
llvm::sys::path::append(FullPathName, RelativePathName);
File = SourceMgr.getFileManager().getFile(FullPathName);
if (!File) {
// Check whether this file is in the private headers.
// FIXME: Should we retain the subframework paths here?
RelativePathName.clear();
FullPathName.resize(FullPathLength);
llvm::sys::path::append(RelativePathName, "PrivateHeaders",
Header.FileName);
llvm::sys::path::append(FullPathName, RelativePathName);
File = SourceMgr.getFileManager().getFile(FullPathName);
}
} else {
// Lookup for normal headers.
llvm::sys::path::append(RelativePathName, Header.FileName);
llvm::sys::path::append(FullPathName, RelativePathName);
File = SourceMgr.getFileManager().getFile(FullPathName);
// If this is a system module with a top-level header, this header
// may have a counterpart (or replacement) in the set of headers
// supplied by Clang. Find that builtin header.
if (ActiveModule->IsSystem && LeadingToken != MMToken::UmbrellaKeyword &&
BuiltinIncludeDir && BuiltinIncludeDir != Directory &&
isBuiltinHeader(Header.FileName)) {
SmallString<128> BuiltinPathName(BuiltinIncludeDir->getName());
llvm::sys::path::append(BuiltinPathName, Header.FileName);
BuiltinFile = SourceMgr.getFileManager().getFile(BuiltinPathName);
// If Clang supplies this header but the underlying system does not,
// just silently swap in our builtin version. Otherwise, we'll end
// up adding both (later).
//
// For local visibility, entirely replace the system file with our
// one and textually include the system one. We need to pass macros
// from our header to the system one if we #include_next it.
//
// FIXME: Can we do this in all cases?
if (BuiltinFile && (!File || Map.LangOpts.ModulesLocalVisibility)) {
File = BuiltinFile;
RelativePathName = BuiltinPathName;
BuiltinFile = nullptr;
}
}
}
}
// FIXME: We shouldn't be eagerly stat'ing every file named in a module map.
// Come up with a lazy way to do this.
if (File) {
if (LeadingToken == MMToken::UmbrellaKeyword) {
const DirectoryEntry *UmbrellaDir = File->getDir();
if (Module *UmbrellaModule = Map.UmbrellaDirs[UmbrellaDir]) {
Diags.Report(LeadingLoc, diag::err_mmap_umbrella_clash)
<< UmbrellaModule->getFullModuleName();
HadError = true;
} else {
// Record this umbrella header.
Map.setUmbrellaHeader(ActiveModule, File, RelativePathName.str());
}
} else if (LeadingToken == MMToken::ExcludeKeyword) {
Module::Header H = {RelativePathName.str(), File};
Map.excludeHeader(ActiveModule, H);
} else {
// If there is a builtin counterpart to this file, add it now, before
// the "real" header, so we build the built-in one first when building
// the module.
if (BuiltinFile) {
// FIXME: Taking the name from the FileEntry is unstable and can give
// different results depending on how we've previously named that file
// in this build.
Module::Header H = { BuiltinFile->getName(), BuiltinFile };
Map.addHeader(ActiveModule, H, Role);
}
// Record this header.
Module::Header H = { RelativePathName.str(), File };
Map.addHeader(ActiveModule, H, Role);
}
} else if (LeadingToken != MMToken::ExcludeKeyword) {
// Ignore excluded header files. They're optional anyway.
// If we find a module that has a missing header, we mark this module as
// unavailable and store the header directive for displaying diagnostics.
Header.IsUmbrella = LeadingToken == MMToken::UmbrellaKeyword;
ActiveModule->markUnavailable();
ActiveModule->MissingHeaders.push_back(Header);
}
}
static int compareModuleHeaders(const Module::Header *A,
const Module::Header *B) {
return A->NameAsWritten.compare(B->NameAsWritten);
}
/// \brief Parse an umbrella directory declaration.
///
/// umbrella-dir-declaration:
/// umbrella string-literal
void ModuleMapParser::parseUmbrellaDirDecl(SourceLocation UmbrellaLoc) {
// Parse the directory name.
if (!Tok.is(MMToken::StringLiteral)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_header)
<< "umbrella";
HadError = true;
return;
}
std::string DirName = Tok.getString();
SourceLocation DirNameLoc = consumeToken();
// Check whether we already have an umbrella.
if (ActiveModule->Umbrella) {
Diags.Report(DirNameLoc, diag::err_mmap_umbrella_clash)
<< ActiveModule->getFullModuleName();
HadError = true;
return;
}
// Look for this file.
const DirectoryEntry *Dir = nullptr;
if (llvm::sys::path::is_absolute(DirName))
Dir = SourceMgr.getFileManager().getDirectory(DirName);
else {
SmallString<128> PathName;
PathName = Directory->getName();
llvm::sys::path::append(PathName, DirName);
Dir = SourceMgr.getFileManager().getDirectory(PathName);
}
if (!Dir) {
Diags.Report(DirNameLoc, diag::err_mmap_umbrella_dir_not_found)
<< DirName;
HadError = true;
return;
}
if (UsesRequiresExcludedHack.count(ActiveModule)) {
// Mark this header 'textual' (see doc comment for
// ModuleMapParser::UsesRequiresExcludedHack). Although iterating over the
// directory is relatively expensive, in practice this only applies to the
// uncommonly used Tcl module on Darwin platforms.
std::error_code EC;
SmallVector<Module::Header, 6> Headers;
for (llvm::sys::fs::recursive_directory_iterator I(Dir->getName(), EC), E;
I != E && !EC; I.increment(EC)) {
if (const FileEntry *FE = SourceMgr.getFileManager().getFile(I->path())) {
Module::Header Header = {I->path(), FE};
Headers.push_back(std::move(Header));
}
}
// Sort header paths so that the pcm doesn't depend on iteration order.
llvm::array_pod_sort(Headers.begin(), Headers.end(), compareModuleHeaders);
for (auto &Header : Headers)
Map.addHeader(ActiveModule, std::move(Header), ModuleMap::TextualHeader);
return;
}
if (Module *OwningModule = Map.UmbrellaDirs[Dir]) {
Diags.Report(UmbrellaLoc, diag::err_mmap_umbrella_clash)
<< OwningModule->getFullModuleName();
HadError = true;
return;
}
// Record this umbrella directory.
Map.setUmbrellaDir(ActiveModule, Dir, DirName);
}
/// \brief Parse a module export declaration.
///
/// export-declaration:
/// 'export' wildcard-module-id
///
/// wildcard-module-id:
/// identifier
/// '*'
/// identifier '.' wildcard-module-id
void ModuleMapParser::parseExportDecl() {
assert(Tok.is(MMToken::ExportKeyword));
SourceLocation ExportLoc = consumeToken();
// Parse the module-id with an optional wildcard at the end.
ModuleId ParsedModuleId;
bool Wildcard = false;
do {
// FIXME: Support string-literal module names here.
if (Tok.is(MMToken::Identifier)) {
ParsedModuleId.push_back(std::make_pair(Tok.getString(),
Tok.getLocation()));
consumeToken();
if (Tok.is(MMToken::Period)) {
consumeToken();
continue;
}
break;
}
if(Tok.is(MMToken::Star)) {
Wildcard = true;
consumeToken();
break;
}
Diags.Report(Tok.getLocation(), diag::err_mmap_module_id);
HadError = true;
return;
} while (true);
Module::UnresolvedExportDecl Unresolved = {
ExportLoc, ParsedModuleId, Wildcard
};
ActiveModule->UnresolvedExports.push_back(Unresolved);
}
/// \brief Parse a module use declaration.
///
/// use-declaration:
/// 'use' wildcard-module-id
void ModuleMapParser::parseUseDecl() {
assert(Tok.is(MMToken::UseKeyword));
auto KWLoc = consumeToken();
// Parse the module-id.
ModuleId ParsedModuleId;
parseModuleId(ParsedModuleId);
if (ActiveModule->Parent)
Diags.Report(KWLoc, diag::err_mmap_use_decl_submodule);
else
ActiveModule->UnresolvedDirectUses.push_back(ParsedModuleId);
}
/// \brief Parse a link declaration.
///
/// module-declaration:
/// 'link' 'framework'[opt] string-literal
void ModuleMapParser::parseLinkDecl() {
assert(Tok.is(MMToken::LinkKeyword));
SourceLocation LinkLoc = consumeToken();
// Parse the optional 'framework' keyword.
bool IsFramework = false;
if (Tok.is(MMToken::FrameworkKeyword)) {
consumeToken();
IsFramework = true;
}
// Parse the library name
if (!Tok.is(MMToken::StringLiteral)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_library_name)
<< IsFramework << SourceRange(LinkLoc);
HadError = true;
return;
}
std::string LibraryName = Tok.getString();
consumeToken();
ActiveModule->LinkLibraries.push_back(Module::LinkLibrary(LibraryName,
IsFramework));
}
/// \brief Parse a configuration macro declaration.
///
/// module-declaration:
/// 'config_macros' attributes[opt] config-macro-list?
///
/// config-macro-list:
/// identifier (',' identifier)?
void ModuleMapParser::parseConfigMacros() {
assert(Tok.is(MMToken::ConfigMacros));
SourceLocation ConfigMacrosLoc = consumeToken();
// Only top-level modules can have configuration macros.
if (ActiveModule->Parent) {
Diags.Report(ConfigMacrosLoc, diag::err_mmap_config_macro_submodule);
}
// Parse the optional attributes.
Attributes Attrs;
parseOptionalAttributes(Attrs);
if (Attrs.IsExhaustive && !ActiveModule->Parent) {
ActiveModule->ConfigMacrosExhaustive = true;
}
// If we don't have an identifier, we're done.
// FIXME: Support macros with the same name as a keyword here.
if (!Tok.is(MMToken::Identifier))
return;
// Consume the first identifier.
if (!ActiveModule->Parent) {
ActiveModule->ConfigMacros.push_back(Tok.getString().str());
}
consumeToken();
do {
// If there's a comma, consume it.
if (!Tok.is(MMToken::Comma))
break;
consumeToken();
// We expect to see a macro name here.
// FIXME: Support macros with the same name as a keyword here.
if (!Tok.is(MMToken::Identifier)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_config_macro);
break;
}
// Consume the macro name.
if (!ActiveModule->Parent) {
ActiveModule->ConfigMacros.push_back(Tok.getString().str());
}
consumeToken();
} while (true);
}
/// \brief Format a module-id into a string.
static std::string formatModuleId(const ModuleId &Id) {
std::string result;
{
llvm::raw_string_ostream OS(result);
for (unsigned I = 0, N = Id.size(); I != N; ++I) {
if (I)
OS << ".";
OS << Id[I].first;
}
}
return result;
}
/// \brief Parse a conflict declaration.
///
/// module-declaration:
/// 'conflict' module-id ',' string-literal
void ModuleMapParser::parseConflict() {
assert(Tok.is(MMToken::Conflict));
SourceLocation ConflictLoc = consumeToken();
Module::UnresolvedConflict Conflict;
// Parse the module-id.
if (parseModuleId(Conflict.Id))
return;
// Parse the ','.
if (!Tok.is(MMToken::Comma)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_conflicts_comma)
<< SourceRange(ConflictLoc);
return;
}
consumeToken();
// Parse the message.
if (!Tok.is(MMToken::StringLiteral)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_conflicts_message)
<< formatModuleId(Conflict.Id);
return;
}
Conflict.Message = Tok.getString().str();
consumeToken();
// Add this unresolved conflict.
ActiveModule->UnresolvedConflicts.push_back(Conflict);
}
/// \brief Parse an inferred module declaration (wildcard modules).
///
/// module-declaration:
/// 'explicit'[opt] 'framework'[opt] 'module' * attributes[opt]
/// { inferred-module-member* }
///
/// inferred-module-member:
/// 'export' '*'
/// 'exclude' identifier
void ModuleMapParser::parseInferredModuleDecl(bool Framework, bool Explicit) {
assert(Tok.is(MMToken::Star));
SourceLocation StarLoc = consumeToken();
bool Failed = false;
// Inferred modules must be submodules.
if (!ActiveModule && !Framework) {
Diags.Report(StarLoc, diag::err_mmap_top_level_inferred_submodule);
Failed = true;
}
if (ActiveModule) {
// Inferred modules must have umbrella directories.
if (!Failed && ActiveModule->IsAvailable &&
!ActiveModule->getUmbrellaDir()) {
Diags.Report(StarLoc, diag::err_mmap_inferred_no_umbrella);
Failed = true;
}
// Check for redefinition of an inferred module.
if (!Failed && ActiveModule->InferSubmodules) {
Diags.Report(StarLoc, diag::err_mmap_inferred_redef);
if (ActiveModule->InferredSubmoduleLoc.isValid())
Diags.Report(ActiveModule->InferredSubmoduleLoc,
diag::note_mmap_prev_definition);
Failed = true;
}
// Check for the 'framework' keyword, which is not permitted here.
if (Framework) {
Diags.Report(StarLoc, diag::err_mmap_inferred_framework_submodule);
Framework = false;
}
} else if (Explicit) {
Diags.Report(StarLoc, diag::err_mmap_explicit_inferred_framework);
Explicit = false;
}
// If there were any problems with this inferred submodule, skip its body.
if (Failed) {
if (Tok.is(MMToken::LBrace)) {
consumeToken();
skipUntil(MMToken::RBrace);
if (Tok.is(MMToken::RBrace))
consumeToken();
}
HadError = true;
return;
}
// Parse optional attributes.
Attributes Attrs;
parseOptionalAttributes(Attrs);
if (ActiveModule) {
// Note that we have an inferred submodule.
ActiveModule->InferSubmodules = true;
ActiveModule->InferredSubmoduleLoc = StarLoc;
ActiveModule->InferExplicitSubmodules = Explicit;
} else {
// We'll be inferring framework modules for this directory.
Map.InferredDirectories[Directory].InferModules = true;
Map.InferredDirectories[Directory].Attrs = Attrs;
Map.InferredDirectories[Directory].ModuleMapFile = ModuleMapFile;
// FIXME: Handle the 'framework' keyword.
}
// Parse the opening brace.
if (!Tok.is(MMToken::LBrace)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_lbrace_wildcard);
HadError = true;
return;
}
SourceLocation LBraceLoc = consumeToken();
// Parse the body of the inferred submodule.
bool Done = false;
do {
switch (Tok.Kind) {
case MMToken::EndOfFile:
case MMToken::RBrace:
Done = true;
break;
case MMToken::ExcludeKeyword: {
if (ActiveModule) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_inferred_member)
<< (ActiveModule != nullptr);
consumeToken();
break;
}
consumeToken();
// FIXME: Support string-literal module names here.
if (!Tok.is(MMToken::Identifier)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_missing_exclude_name);
break;
}
Map.InferredDirectories[Directory].ExcludedModules
.push_back(Tok.getString());
consumeToken();
break;
}
case MMToken::ExportKeyword:
if (!ActiveModule) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_inferred_member)
<< (ActiveModule != nullptr);
consumeToken();
break;
}
consumeToken();
if (Tok.is(MMToken::Star))
ActiveModule->InferExportWildcard = true;
else
Diags.Report(Tok.getLocation(),
diag::err_mmap_expected_export_wildcard);
consumeToken();
break;
case MMToken::ExplicitKeyword:
case MMToken::ModuleKeyword:
case MMToken::HeaderKeyword:
case MMToken::PrivateKeyword:
case MMToken::UmbrellaKeyword:
default:
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_inferred_member)
<< (ActiveModule != nullptr);
consumeToken();
break;
}
} while (!Done);
if (Tok.is(MMToken::RBrace))
consumeToken();
else {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_rbrace);
Diags.Report(LBraceLoc, diag::note_mmap_lbrace_match);
HadError = true;
}
}
/// \brief Parse optional attributes.
///
/// attributes:
/// attribute attributes
/// attribute
///
/// attribute:
/// [ identifier ]
///
/// \param Attrs Will be filled in with the parsed attributes.
///
/// \returns true if an error occurred, false otherwise.
bool ModuleMapParser::parseOptionalAttributes(Attributes &Attrs) {
bool HadError = false;
while (Tok.is(MMToken::LSquare)) {
// Consume the '['.
SourceLocation LSquareLoc = consumeToken();
// Check whether we have an attribute name here.
if (!Tok.is(MMToken::Identifier)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_attribute);
skipUntil(MMToken::RSquare);
if (Tok.is(MMToken::RSquare))
consumeToken();
HadError = true;
}
// Decode the attribute name.
AttributeKind Attribute
= llvm::StringSwitch<AttributeKind>(Tok.getString())
.Case("exhaustive", AT_exhaustive)
.Case("extern_c", AT_extern_c)
.Case("system", AT_system)
.Default(AT_unknown);
switch (Attribute) {
case AT_unknown:
Diags.Report(Tok.getLocation(), diag::warn_mmap_unknown_attribute)
<< Tok.getString();
break;
case AT_system:
Attrs.IsSystem = true;
break;
case AT_extern_c:
Attrs.IsExternC = true;
break;
case AT_exhaustive:
Attrs.IsExhaustive = true;
break;
}
consumeToken();
// Consume the ']'.
if (!Tok.is(MMToken::RSquare)) {
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_rsquare);
Diags.Report(LSquareLoc, diag::note_mmap_lsquare_match);
skipUntil(MMToken::RSquare);
HadError = true;
}
if (Tok.is(MMToken::RSquare))
consumeToken();
}
return HadError;
}
/// \brief Parse a module map file.
///
/// module-map-file:
/// module-declaration*
bool ModuleMapParser::parseModuleMapFile() {
do {
switch (Tok.Kind) {
case MMToken::EndOfFile:
return HadError;
case MMToken::ExplicitKeyword:
case MMToken::ExternKeyword:
case MMToken::ModuleKeyword:
case MMToken::FrameworkKeyword:
parseModuleDecl();
break;
case MMToken::Comma:
case MMToken::ConfigMacros:
case MMToken::Conflict:
case MMToken::Exclaim:
case MMToken::ExcludeKeyword:
case MMToken::ExportKeyword:
case MMToken::HeaderKeyword:
case MMToken::Identifier:
case MMToken::LBrace:
case MMToken::LinkKeyword:
case MMToken::LSquare:
case MMToken::Period:
case MMToken::PrivateKeyword:
case MMToken::RBrace:
case MMToken::RSquare:
case MMToken::RequiresKeyword:
case MMToken::Star:
case MMToken::StringLiteral:
case MMToken::TextualKeyword:
case MMToken::UmbrellaKeyword:
case MMToken::UseKeyword:
Diags.Report(Tok.getLocation(), diag::err_mmap_expected_module);
HadError = true;
consumeToken();
break;
}
} while (true);
}
bool ModuleMap::parseModuleMapFile(const FileEntry *File, bool IsSystem,
const DirectoryEntry *Dir,
SourceLocation ExternModuleLoc) {
llvm::DenseMap<const FileEntry *, bool>::iterator Known
= ParsedModuleMap.find(File);
if (Known != ParsedModuleMap.end())
return Known->second;
assert(Target && "Missing target information");
auto FileCharacter = IsSystem ? SrcMgr::C_System : SrcMgr::C_User;
FileID ID = SourceMgr.createFileID(File, ExternModuleLoc, FileCharacter);
const llvm::MemoryBuffer *Buffer = SourceMgr.getBuffer(ID);
if (!Buffer)
return ParsedModuleMap[File] = true;
// Parse this module map file.
Lexer L(ID, SourceMgr.getBuffer(ID), SourceMgr, MMapLangOpts);
SourceLocation Start = L.getSourceLocation();
ModuleMapParser Parser(L, SourceMgr, Target, Diags, *this, File, Dir,
BuiltinIncludeDir, IsSystem);
bool Result = Parser.parseModuleMapFile();
ParsedModuleMap[File] = Result;
// Notify callbacks that we parsed it.
for (const auto &Cb : Callbacks)
Cb->moduleMapFileRead(Start, *File, IsSystem);
return Result;
}