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Construct SourceManager with UserFilesAreVolatile

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Prettify pipeline
This commit is contained in:
Fangrui Song 2018-09-28 13:41:50 -07:00
parent a127ca9b02
commit d4871207ed
2 changed files with 15 additions and 7 deletions
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6
src/clang_complete.cc
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@ -202,6 +202,12 @@ std::unique_ptr<CompilerInstance> BuildCompilerInstance(
Clang->getDiagnostics(), Clang->getInvocation().TargetOpts));
if (!Clang->hasTarget())
return nullptr;
// Construct SourceManager with UserFilesAreVolatile: true because otherwise
// RequiresNullTerminator: true may cause out-of-bounds read when a file is
// mmap'ed but is saved concurrently.
Clang->createFileManager();
Clang->setSourceManager(new SourceManager(Clang->getDiagnostics(),
Clang->getFileManager(), true));
return Clang;
}

16
src/pipeline.cc
View File

@ -162,10 +162,14 @@ std::unique_ptr<IndexFile> RawCacheLoad(const std::string &path) {
IndexFile::kMajorVersion);
}
bool Indexer_Parse(CompletionManager *completion, WorkingFiles *wfiles,
Project *project, VFS *vfs, const GroupMatch &matcher) {
std::mutex &GetFileMutex(const std::string &path) {
const int N_MUTEXES = 256;
static std::mutex mutexes[N_MUTEXES];
return mutexes[std::hash<std::string>()(path) % N_MUTEXES];
}
bool Indexer_Parse(CompletionManager *completion, WorkingFiles *wfiles,
Project *project, VFS *vfs, const GroupMatch &matcher) {
std::optional<Index_Request> opt_request = index_request->TryPopFront();
if (!opt_request)
return false;
@ -216,8 +220,7 @@ bool Indexer_Parse(CompletionManager *completion, WorkingFiles *wfiles,
if (reparse < 2)
do {
std::unique_lock lock(
mutexes[std::hash<std::string>()(path_to_index) % N_MUTEXES]);
std::unique_lock lock(GetFileMutex(path_to_index));
prev = RawCacheLoad(path_to_index);
if (!prev || CacheInvalid(vfs, prev.get(), path_to_index, entry.args,
std::nullopt))
@ -256,8 +259,7 @@ bool Indexer_Parse(CompletionManager *completion, WorkingFiles *wfiles,
std::string path = dep.first.val().str();
if (!vfs->Stamp(path, dep.second, 1))
continue;
std::lock_guard lock1(
mutexes[std::hash<std::string>()(path) % N_MUTEXES]);
std::lock_guard lock1(GetFileMutex(path));
prev = RawCacheLoad(path);
if (!prev)
continue;
@ -313,7 +315,7 @@ bool Indexer_Parse(CompletionManager *completion, WorkingFiles *wfiles,
LOG_IF_S(INFO, loud) << "store index for " << path << " (delta: " << !!prev
<< ")";
{
std::lock_guard lock(mutexes[std::hash<std::string>()(path) % N_MUTEXES]);
std::lock_guard lock(GetFileMutex(path));
if (vfs->Loaded(path))
prev = RawCacheLoad(path);
else