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C++: Fix crash after triggering completion and closing editor

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Fix use-after-free for the following case:
  1. Open an editor
  2. Trigger a long processing completion
     (e.g. simulate with QThread::msleep in
      CppCompletionAssistInterface::getCppSpecifics)
  3. ...and immediately close the editor (e.g. with Ctrl+W)
  4. Wait until it crashes.

The completion thread relied on the BuiltinEditorDocumentParser object,
which is deleted once the editor is closed. Fixed by sharing the
ownership of that object between the *EditorDocumentProcessor and the
completion assist interface.

This case came up when doing tests for the bug report below.

Task-number: QTCREATORBUG-14991
Change-Id: I0b009229e68fc6b7838740858cdc41a32403fe6f
Reviewed-by: David Schulz <david.schulz@theqtcompany.com>
This commit is contained in:
Nikolai Kosjar
2015-09-01 17:34:07 +02:00
parent c504e56d0c
commit 169556db2f
17 changed files with 49 additions and 50 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp
View File

@@ -94,7 +94,7 @@ ClangEditorDocumentProcessor::ClangEditorDocumentProcessor(
TextEditor::TextDocument *document)
: BaseEditorDocumentProcessor(document)
, m_modelManagerSupport(modelManagerSupport)
, m_parser(document->filePath().toString())
, m_parser(new ClangEditorDocumentParser(document->filePath().toString()))
, m_parserRevision(0)
, m_semanticHighlighter(document)
, m_builtinProcessor(document, /*enableSemanticHighlighter=*/ false)
@@ -114,7 +114,7 @@ ClangEditorDocumentProcessor::ClangEditorDocumentProcessor(
const int firstLine = 1;
const int lastLine = baseTextDocument()->document()->blockCount();
CreateMarkers *createMarkers = CreateMarkers::create(m_parser.semanticMarker(),
CreateMarkers *createMarkers = CreateMarkers::create(m_parser->semanticMarker(),
baseTextDocument()->filePath().toString(),
firstLine, lastLine);
return createMarkers->start();
@@ -169,9 +169,9 @@ CppTools::SemanticInfo ClangEditorDocumentProcessor::recalculateSemanticInfo()
return m_builtinProcessor.recalculateSemanticInfo();
}
CppTools::BaseEditorDocumentParser *ClangEditorDocumentProcessor::parser()
CppTools::BaseEditorDocumentParser::Ptr ClangEditorDocumentProcessor::parser()
{
return &m_parser;
return m_parser;
}
CPlusPlus::Snapshot ClangEditorDocumentProcessor::snapshot()
@@ -196,7 +196,7 @@ ClangEditorDocumentProcessor *ClangEditorDocumentProcessor::get(const QString &f
void ClangEditorDocumentProcessor::updateProjectPartAndTranslationUnitForCompletion()
{
const CppTools::ProjectPart::Ptr projectPart = m_parser.projectPart();
const CppTools::ProjectPart::Ptr projectPart = m_parser->projectPart();
QTC_ASSERT(projectPart, return);
updateTranslationUnitForCompletion(*projectPart.data());
@@ -209,11 +209,11 @@ void ClangEditorDocumentProcessor::onParserFinished()
return;
// Emit ifdefed out blocks
const auto ifdefoutBlocks = toTextEditorBlocks(m_parser.ifdefedOutBlocks());
const auto ifdefoutBlocks = toTextEditorBlocks(m_parser->ifdefedOutBlocks());
emit ifdefedOutBlocksUpdated(revision(), ifdefoutBlocks);
// Emit code warnings
const auto diagnostics = toCppToolsDiagnostics(filePath(), m_parser.diagnostics());
const auto diagnostics = toCppToolsDiagnostics(filePath(), m_parser->diagnostics());
const auto codeWarnings = toTextEditorSelections(diagnostics, textDocument());
emit codeWarningsUpdated(revision(), codeWarnings);

4
src/plugins/clangcodemodel/clangeditordocumentprocessor.h
View File

@@ -59,7 +59,7 @@ public:
void semanticRehighlight() override;
void recalculateSemanticInfoDetached(bool force) override;
CppTools::SemanticInfo recalculateSemanticInfo() override;
CppTools::BaseEditorDocumentParser *parser() override;
CppTools::BaseEditorDocumentParser::Ptr parser() override;
CPlusPlus::Snapshot snapshot() override;
bool isParserRunning() const override;
@@ -78,7 +78,7 @@ private:
QPointer<ModelManagerSupportClang> m_modelManagerSupport;
ClangEditorDocumentParser m_parser;
QSharedPointer<ClangEditorDocumentParser> m_parser;
CppTools::ProjectPart::Ptr m_projectPart;
QFutureWatcher<void> m_parserWatcher;
unsigned m_parserRevision;

2
src/plugins/clangcodemodel/clangutils.cpp
View File

@@ -234,7 +234,7 @@ QStringList createPCHInclusionOptions(const QString &pchFile)
ProjectPart::Ptr projectPartForFile(const QString &filePath)
{
if (CppTools::BaseEditorDocumentParser *parser = CppTools::BaseEditorDocumentParser::get(filePath))
if (const auto parser = CppTools::BaseEditorDocumentParser::get(filePath))
return parser->projectPart();
return ProjectPart::Ptr();
}

2
src/plugins/cppeditor/cppeditordocument.cpp
View File

@@ -266,7 +266,7 @@ void CppEditorDocument::updatePreprocessorSettings()
void CppEditorDocument::setPreprocessorSettings(const CppTools::ProjectPart::Ptr &projectPart,
const QByteArray &defines)
{
CppTools::BaseEditorDocumentParser *parser = processor()->parser();
const auto parser = processor()->parser();
QTC_ASSERT(parser, return);
if (parser->projectPart() != projectPart || parser->configuration().editorDefines != defines) {
CppTools::BaseEditorDocumentParser::Configuration config = parser->configuration();

4
src/plugins/cpptools/baseeditordocumentparser.cpp
View File

@@ -104,14 +104,14 @@ ProjectPart::Ptr BaseEditorDocumentParser::projectPart() const
return state().projectPart;
}
BaseEditorDocumentParser *BaseEditorDocumentParser::get(const QString &filePath)
BaseEditorDocumentParser::Ptr BaseEditorDocumentParser::get(const QString &filePath)
{
CppModelManager *cmmi = CppModelManager::instance();
if (CppEditorDocumentHandle *cppEditorDocument = cmmi->cppEditorDocument(filePath)) {
if (BaseEditorDocumentProcessor *processor = cppEditorDocument->processor())
return processor->parser();
}
return 0;
return BaseEditorDocumentParser::Ptr();
}
ProjectPart::Ptr BaseEditorDocumentParser::determineProjectPart(const QString &filePath,

3
src/plugins/cpptools/baseeditordocumentparser.h
View File

@@ -44,7 +44,8 @@ class CPPTOOLS_EXPORT BaseEditorDocumentParser : public QObject
Q_OBJECT
public:
static BaseEditorDocumentParser *get(const QString &filePath);
using Ptr = QSharedPointer<BaseEditorDocumentParser>;;
static Ptr get(const QString &filePath);
struct Configuration {
bool stickToPreviousProjectPart = true;

2
src/plugins/cpptools/baseeditordocumentprocessor.cpp
View File

@@ -118,7 +118,7 @@ QList<QTextEdit::ExtraSelection> BaseEditorDocumentProcessor::toTextEditorSelect
}
void BaseEditorDocumentProcessor::runParser(QFutureInterface<void> &future,
BaseEditorDocumentParser *parser,
BaseEditorDocumentParser::Ptr parser,
BaseEditorDocumentParser::InMemoryInfo info)
{
future.setProgressRange(0, 1);

4
src/plugins/cpptools/baseeditordocumentprocessor.h
View File

@@ -62,7 +62,7 @@ public:
virtual void recalculateSemanticInfoDetached(bool force) = 0;
virtual CppTools::SemanticInfo recalculateSemanticInfo() = 0;
virtual CPlusPlus::Snapshot snapshot() = 0;
virtual BaseEditorDocumentParser *parser() = 0;
virtual BaseEditorDocumentParser::Ptr parser() = 0;
virtual bool isParserRunning() const = 0;
public:
@@ -85,7 +85,7 @@ protected:
QTextDocument *textDocument);
static void runParser(QFutureInterface<void> &future,
CppTools::BaseEditorDocumentParser *parser,
BaseEditorDocumentParser::Ptr parser,
BaseEditorDocumentParser::InMemoryInfo info);
// Convenience

8
src/plugins/cpptools/builtineditordocumentparser.cpp
View File

@@ -226,11 +226,11 @@ ProjectPart::HeaderPaths BuiltinEditorDocumentParser::headerPaths() const
return extraState().headerPaths;
}
BuiltinEditorDocumentParser *BuiltinEditorDocumentParser::get(const QString &filePath)
BuiltinEditorDocumentParser::Ptr BuiltinEditorDocumentParser::get(const QString &filePath)
{
if (BaseEditorDocumentParser *b = BaseEditorDocumentParser::get(filePath))
return qobject_cast<BuiltinEditorDocumentParser *>(b);
return 0;
if (BaseEditorDocumentParser::Ptr b = BaseEditorDocumentParser::get(filePath))
return b.objectCast<BuiltinEditorDocumentParser>();
return BuiltinEditorDocumentParser::Ptr();
}
void BuiltinEditorDocumentParser::addFileAndDependencies(Snapshot *snapshot,

3
src/plugins/cpptools/builtineditordocumentparser.h
View File

@@ -61,7 +61,8 @@ signals:
void finished(CPlusPlus::Document::Ptr document, CPlusPlus::Snapshot snapshot);
public:
static BuiltinEditorDocumentParser *get(const QString &filePath);
using Ptr = QSharedPointer<BuiltinEditorDocumentParser>;
static Ptr get(const QString &filePath);
private:
void updateHelper(const InMemoryInfo &info) override;

14
src/plugins/cpptools/builtineditordocumentprocessor.cpp
View File

@@ -125,7 +125,7 @@ BuiltinEditorDocumentProcessor::BuiltinEditorDocumentProcessor(
TextEditor::TextDocument *document,
bool enableSemanticHighlighter)
: BaseEditorDocumentProcessor(document)
, m_parser(document->filePath().toString())
, m_parser(new BuiltinEditorDocumentParser(document->filePath().toString()))
, m_codeWarningsUpdated(false)
, m_semanticHighlighter(enableSemanticHighlighter
? new CppTools::SemanticHighlighter(document)
@@ -135,9 +135,9 @@ BuiltinEditorDocumentProcessor::BuiltinEditorDocumentProcessor(
QSharedPointer<CppCodeModelSettings> cms = CppToolsPlugin::instance()->codeModelSettings();
BaseEditorDocumentParser::Configuration config = m_parser.configuration();
BaseEditorDocumentParser::Configuration config = m_parser->configuration();
config.usePrecompiledHeaders = cms->pchUsage() != CppCodeModelSettings::PchUse_None;
m_parser.setConfiguration(config);
m_parser->setConfiguration(config);
if (m_semanticHighlighter) {
m_semanticHighlighter->setHighlightingRunner(
@@ -152,7 +152,7 @@ BuiltinEditorDocumentProcessor::BuiltinEditorDocumentProcessor(
});
}
connect(&m_parser, &BuiltinEditorDocumentParser::finished,
connect(m_parser.data(), &BuiltinEditorDocumentParser::finished,
this, &BuiltinEditorDocumentProcessor::onParserFinished);
connect(&m_semanticInfoUpdater, &SemanticInfoUpdater::updated,
this, &BuiltinEditorDocumentProcessor::onSemanticInfoUpdated);
@@ -171,14 +171,14 @@ void BuiltinEditorDocumentProcessor::run()
BuiltinEditorDocumentParser::InMemoryInfo(false));
}
BaseEditorDocumentParser *BuiltinEditorDocumentProcessor::parser()
BaseEditorDocumentParser::Ptr BuiltinEditorDocumentProcessor::parser()
{
return &m_parser;
return m_parser;
}
CPlusPlus::Snapshot BuiltinEditorDocumentProcessor::snapshot()
{
return m_parser.snapshot();
return m_parser->snapshot();
}
void BuiltinEditorDocumentProcessor::recalculateSemanticInfoDetached(bool force)

4
src/plugins/cpptools/builtineditordocumentprocessor.h
View File

@@ -53,7 +53,7 @@ public:
void recalculateSemanticInfoDetached(bool force) override;
void semanticRehighlight() override;
CppTools::SemanticInfo recalculateSemanticInfo() override;
BaseEditorDocumentParser *parser() override;
BaseEditorDocumentParser::Ptr parser() override;
CPlusPlus::Snapshot snapshot() override;
bool isParserRunning() const override;
@@ -66,7 +66,7 @@ private:
SemanticInfo::Source createSemanticInfoSource(bool force) const;
private:
BuiltinEditorDocumentParser m_parser;
BuiltinEditorDocumentParser::Ptr m_parser;
QFuture<void> m_parserFuture;
CPlusPlus::Snapshot m_documentSnapshot;

14
src/plugins/cpptools/cppcompletionassist.cpp
View File

@@ -426,13 +426,13 @@ AssistInterface *InternalCompletionAssistProvider::createAssistInterface(
{
QTC_ASSERT(textEditorWidget, return 0);
CppModelManager *modelManager = CppModelManager::instance();
return new CppCompletionAssistInterface(filePath,
textEditorWidget,
BuiltinEditorDocumentParser::get(filePath),
languageFeatures,
position,
reason,
modelManager->workingCopy());
CppModelManager::instance()->workingCopy());
}
// -----------------
@@ -2187,11 +2187,11 @@ void CppCompletionAssistInterface::getCppSpecifics() const
return;
m_gotCppSpecifics = true;
if (BuiltinEditorDocumentParser *parser = BuiltinEditorDocumentParser::get(fileName())) {
parser->update(BuiltinEditorDocumentParser::InMemoryInfo(false));
m_snapshot = parser->snapshot();
m_headerPaths = parser->headerPaths();
if (Document::Ptr document = parser->document())
if (m_parser) {
m_parser->update(BuiltinEditorDocumentParser::InMemoryInfo(false));
m_snapshot = m_parser->snapshot();
m_headerPaths = m_parser->headerPaths();
if (Document::Ptr document = m_parser->document())
m_languageFeatures = document->languageFeatures();
else
m_languageFeatures = LanguageFeatures::defaultFeatures();

4
src/plugins/cpptools/cppcompletionassist.h
View File

@@ -31,6 +31,7 @@
#ifndef CPPCOMPLETIONASSIST_H
#define CPPCOMPLETIONASSIST_H
#include "builtineditordocumentparser.h"
#include "cppcompletionassistprocessor.h"
#include "cppcompletionassistprovider.h"
#include "cppmodelmanager.h"
@@ -171,11 +172,13 @@ class CppCompletionAssistInterface : public TextEditor::AssistInterface
public:
CppCompletionAssistInterface(const QString &filePath,
const TextEditor::TextEditorWidget *textEditorWidget,
BuiltinEditorDocumentParser::Ptr parser,
const CPlusPlus::LanguageFeatures &languageFeatures,
int position,
TextEditor::AssistReason reason,
const WorkingCopy &workingCopy)
: TextEditor::AssistInterface(textEditorWidget->document(), position, filePath, reason)
, m_parser(parser)
, m_gotCppSpecifics(false)
, m_workingCopy(workingCopy)
, m_languageFeatures(languageFeatures)
@@ -204,6 +207,7 @@ public:
private:
void getCppSpecifics() const;
BuiltinEditorDocumentParser::Ptr m_parser;
mutable bool m_gotCppSpecifics;
WorkingCopy m_workingCopy;
mutable CPlusPlus::Snapshot m_snapshot;

4
src/plugins/cpptools/cppmodelmanager_test.cpp
View File

@@ -910,7 +910,7 @@ void CppToolsPlugin::test_modelmanager_precompiled_headers()
QCOMPARE(Core::DocumentModel::openedDocuments().size(), 1);
QVERIFY(mm->isCppEditor(editor));
auto *parser = BuiltinEditorDocumentParser::get(fileName);
auto parser = BuiltinEditorDocumentParser::get(fileName);
QVERIFY(parser);
BaseEditorDocumentParser::Configuration config = parser->configuration();
config.usePrecompiledHeaders = true;
@@ -994,7 +994,7 @@ void CppToolsPlugin::test_modelmanager_defines_per_editor()
QVERIFY(mm->isCppEditor(editor));
const QString filePath = editor->document()->filePath().toString();
BaseEditorDocumentParser *parser = BaseEditorDocumentParser::get(filePath);
const auto parser = BaseEditorDocumentParser::get(filePath);
BaseEditorDocumentParser::Configuration config = parser->configuration();
config.editorDefines = editorDefines.toUtf8();
parser->setConfiguration(config);

4
src/plugins/designer/gotoslot_test.cpp
View File

@@ -196,12 +196,12 @@ public:
}
// Compare
BuiltinEditorDocumentParser *cppDocumentParser = BuiltinEditorDocumentParser::get(cppFile);
const auto cppDocumentParser = BuiltinEditorDocumentParser::get(cppFile);
QVERIFY(cppDocumentParser);
const Document::Ptr cppDocument = cppDocumentParser->document();
QVERIFY(checkDiagsnosticMessages(cppDocument));
BuiltinEditorDocumentParser *hDocumentParser = BuiltinEditorDocumentParser::get(hFile);
const auto hDocumentParser = BuiltinEditorDocumentParser::get(hFile);
QVERIFY(hDocumentParser);
const Document::Ptr hDocument = hDocumentParser->document();
QVERIFY(checkDiagsnosticMessages(hDocument));

9
src/plugins/texteditor/codeassist/codeassistant.cpp
View File

@@ -89,7 +89,6 @@ public:
virtual bool eventFilter(QObject *o, QEvent *e);
private:
void finalizeRequest();
void proposalComputed();
void processProposalItem(AssistProposalItem *proposalItem);
void handlePrefixExpansion(const QString &newPrefix);
@@ -251,7 +250,7 @@ void CodeAssistantPrivate::requestProposal(AssistReason reason,
connect(m_requestRunner, &ProcessorRunner::finished,
this, &CodeAssistantPrivate::proposalComputed);
connect(m_requestRunner, &ProcessorRunner::finished,
this, &CodeAssistantPrivate::finalizeRequest);
m_requestRunner, &QObject::deleteLater);
connect(m_requestRunner, &ProcessorRunner::finished,
q, &CodeAssistant::finished);
assistInterface->prepareForAsyncUse();
@@ -383,12 +382,6 @@ void CodeAssistantPrivate::handlePrefixExpansion(const QString &newPrefix)
notifyChange();
}
void CodeAssistantPrivate::finalizeRequest()
{
if (ProcessorRunner *runner = qobject_cast<ProcessorRunner *>(sender()))
delete runner;
}
void CodeAssistantPrivate::finalizeProposal()
{
stopAutomaticProposalTimer();