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Set RetainRemappedFileBuffers to true

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Reported by David Welch in #350.

This fixes double-free of llvm::MemoryBuffer when parsing fails.
This commit is contained in:
Fangrui Song 2019-03-29 07:48:58 -07:00
parent aded3faf97
commit b69f62c2bc
2 changed files with 2 additions and 4 deletions
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3
src/indexer.cc
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@ -1256,6 +1256,7 @@ Index(SemaManager *manager, WorkingFiles *wfiles, VFS *vfs,
Clang->getDiagnostics(), Clang->getInvocation().TargetOpts)); Clang->getDiagnostics(), Clang->getInvocation().TargetOpts));
if (!Clang->hasTarget()) if (!Clang->hasTarget())
return {}; return {};
Clang->getPreprocessorOpts().RetainRemappedFileBuffers = true;
#if LLVM_VERSION_MAJOR >= 9 // rC357037 #if LLVM_VERSION_MAJOR >= 9 // rC357037
Clang->createFileManager(FS); Clang->createFileManager(FS);
#else #else
@ -1302,8 +1303,6 @@ Index(SemaManager *manager, WorkingFiles *wfiles, VFS *vfs,
LOG_S(ERROR) << "failed to index " << main; LOG_S(ERROR) << "failed to index " << main;
return {}; return {};
} }
for (auto &Buf : Bufs)
Buf.release();
std::vector<std::unique_ptr<IndexFile>> result; std::vector<std::unique_ptr<IndexFile>> result;
for (auto &it : param.UID2File) { for (auto &it : param.UID2File) {

3
src/sema_manager.cc
View File

@ -313,6 +313,7 @@ std::unique_ptr<CompilerInstance> BuildCompilerInstance(
Clang->getDiagnostics(), Clang->getInvocation().TargetOpts)); Clang->getDiagnostics(), Clang->getInvocation().TargetOpts));
if (!Clang->hasTarget()) if (!Clang->hasTarget())
return nullptr; return nullptr;
Clang->getPreprocessorOpts().RetainRemappedFileBuffers = true;
// Construct SourceManager with UserFilesAreVolatile: true because otherwise // Construct SourceManager with UserFilesAreVolatile: true because otherwise
// RequiresNullTerminator: true may cause out-of-bounds read when a file is // RequiresNullTerminator: true may cause out-of-bounds read when a file is
// mmap'ed but is saved concurrently. // mmap'ed but is saved concurrently.
@ -493,7 +494,6 @@ void *CompletionMain(void *manager_) {
Clang->setCodeCompletionConsumer(task->Consumer.release()); Clang->setCodeCompletionConsumer(task->Consumer.release());
if (!Parse(*Clang)) if (!Parse(*Clang))
continue; continue;
Buf.release();
task->on_complete(&Clang->getCodeCompletionConsumer()); task->on_complete(&Clang->getCodeCompletionConsumer());
} }
@ -583,7 +583,6 @@ void *DiagnosticMain(void *manager_) {
continue; continue;
if (!Parse(*Clang)) if (!Parse(*Clang))
continue; continue;
Buf.release();
auto Fill = [](const DiagBase &d, Diagnostic &ret) { auto Fill = [](const DiagBase &d, Diagnostic &ret) {
ret.range = lsRange{{d.range.start.line, d.range.start.column}, ret.range = lsRange{{d.range.start.line, d.range.start.column},