Fixed QTCREATORBUG-745.

Fixed crash in FindUsages on a dirty file in a large project, which is saved
while the FindUsages is still running.
(cherry picked from commit 417a1c9f284fd4a8c66177eb9f2e65b36b910c15)

7 files changed, 28 insertions, 35 deletions

diff --git a/src/libs/cplusplus/FindUsages.cpp b/src/libs/cplusplus/FindUsages.cpp
index 58c43ed721..a7554a14c1 100644
--- a/src/libs/cplusplus/FindUsages.cpp
+++ b/src/libs/cplusplus/FindUsages.cpp
@@ -465,24 +465,14 @@ bool FindUsages::visit(SimpleDeclarationAST *ast)
 
 bool FindUsages::visit(ObjCSelectorAST *ast)
 {
-#if 1
-    const Identifier *id = ast->name->identifier();
-    if (id == _id) {
-        LookupContext context = currentContext(ast);
-        const QList<Symbol *> candidates = context.resolve(ast->name);
-        reportResult(ast->firstToken(), candidates);
-    }
-#else
-    for (ObjCSelectorArgumentListAST *iter = ast->selector_argument_list; iter;
-         iter = iter->next) {
-        const Identifier *id = identifier(iter->value->name_token);
+    if (ast->name) {
+        const Identifier *id = ast->name->identifier();
         if (id == _id) {
-            LookupContext context = currentContext(iter->value);
+            LookupContext context = currentContext(ast);
             const QList<Symbol *> candidates = context.resolve(ast->name);
-            reportResult(iter->value->name_token, candidates);
+            reportResult(ast->firstToken(), candidates);
         }
     }
-#endif
 
     return false;
 }
diff --git a/src/plugins/cppeditor/cppeditor.cpp b/src/plugins/cppeditor/cppeditor.cpp
index 899a8c1a75..83396edc06 100644
--- a/src/plugins/cppeditor/cppeditor.cpp
+++ b/src/plugins/cppeditor/cppeditor.cpp
@@ -903,7 +903,7 @@ const Macro *CPPEditor::findCanonicalMacro(const QTextCursor &cursor,
 void CPPEditor::findUsages()
 {
     if (Symbol *canonicalSymbol = markSymbols()) {
-        m_modelManager->findUsages(canonicalSymbol);
+        m_modelManager->findUsages(m_lastSemanticInfo.doc, canonicalSymbol);
     } else if (const Macro *macro = findCanonicalMacro(textCursor(), m_lastSemanticInfo.doc)) {
         m_modelManager->findMacroUsages(*macro);
     }
@@ -954,7 +954,7 @@ void CPPEditor::renameUsagesNow()
                                                                    this, SLOT(hideRenameNotification()));
             }
 
-            m_modelManager->renameUsages(canonicalSymbol);
+            m_modelManager->renameUsages(m_lastSemanticInfo.doc, canonicalSymbol);
         }
     }
 }
diff --git a/src/plugins/cpptools/cppfindreferences.cpp b/src/plugins/cpptools/cppfindreferences.cpp
index 4f25edf2f7..e714fa28ab 100644
--- a/src/plugins/cpptools/cppfindreferences.cpp
+++ b/src/plugins/cpptools/cppfindreferences.cpp
@@ -85,13 +85,15 @@ class ProcessFile: public std::unary_function<QString, QList<Usage> >
 {
     const CppTools::CppModelManagerInterface::WorkingCopy workingCopy;
     const Snapshot snapshot;
+    Document::Ptr symbolDocument;
     Symbol *symbol;
 
 public:
     ProcessFile(const CppTools::CppModelManagerInterface::WorkingCopy &workingCopy,
                 const Snapshot snapshot,
+                Document::Ptr symbolDocument,
                 Symbol *symbol)
-        : workingCopy(workingCopy), snapshot(snapshot), symbol(symbol)
+        : workingCopy(workingCopy), snapshot(snapshot), symbolDocument(symbolDocument), symbol(symbol)
     { }
 
     QList<Usage> operator()(const QString &fileName)
@@ -175,6 +177,7 @@ QList<int> CppFindReferences::references(Symbol *symbol,
 static void find_helper(QFutureInterface<Usage> &future,
                         const CppTools::CppModelManagerInterface::WorkingCopy workingCopy,
                         Snapshot snapshot,
+                        Document::Ptr symbolDocument,
                         Symbol *symbol)
 {
     QTime tm;
@@ -204,7 +207,7 @@ static void find_helper(QFutureInterface<Usage> &future,
 
     future.setProgressRange(0, files.size());
 
-    ProcessFile process(workingCopy, snapshot, symbol);
+    ProcessFile process(workingCopy, snapshot, symbolDocument, symbol);
     UpdateUI reduce(&future);
 
     QtConcurrent::blockingMappedReduced<QList<Usage> > (files, process, reduce);
@@ -212,17 +215,17 @@ static void find_helper(QFutureInterface<Usage> &future,
     future.setProgressValue(files.size());
 }
 
-void CppFindReferences::findUsages(Symbol *symbol)
+void CppFindReferences::findUsages(Document::Ptr symbolDocument, Symbol *symbol)
 {
     Find::SearchResult *search = _resultWindow->startNewSearch(Find::SearchResultWindow::SearchOnly);
 
     connect(search, SIGNAL(activated(Find::SearchResultItem)),
             this, SLOT(openEditor(Find::SearchResultItem)));
 
-    findAll_helper(symbol);
+    findAll_helper(symbolDocument, symbol);
 }
 
-void CppFindReferences::renameUsages(Symbol *symbol)
+void CppFindReferences::renameUsages(Document::Ptr symbolDocument, Symbol *symbol)
 {
     if (const Identifier *id = symbol->identifier()) {
         const QString textToReplace = QString::fromUtf8(id->chars(), id->size());
@@ -236,11 +239,11 @@ void CppFindReferences::renameUsages(Symbol *symbol)
         connect(search, SIGNAL(replaceButtonClicked(QString,QList<Find::SearchResultItem>)),
                 SLOT(onReplaceButtonClicked(QString,QList<Find::SearchResultItem>)));
 
-        findAll_helper(symbol);
+        findAll_helper(symbolDocument, symbol);
     }
 }
 
-void CppFindReferences::findAll_helper(Symbol *symbol)
+void CppFindReferences::findAll_helper(Document::Ptr symbolDocument, Symbol *symbol)
 {
     if (! (symbol && symbol->identifier()))
         return;
@@ -254,7 +257,7 @@ void CppFindReferences::findAll_helper(Symbol *symbol)
 
     QFuture<Usage> result;
 
-    result = QtConcurrent::run(&find_helper, workingCopy, snapshot, symbol);
+    result = QtConcurrent::run(&find_helper, workingCopy, snapshot, symbolDocument, symbol);
     m_watcher.setFuture(result);
 
     Core::FutureProgress *progress = progressManager->addTask(result, tr("Searching..."),
diff --git a/src/plugins/cpptools/cppfindreferences.h b/src/plugins/cpptools/cppfindreferences.h
index 06ad73fc53..74ede972e2 100644
--- a/src/plugins/cpptools/cppfindreferences.h
+++ b/src/plugins/cpptools/cppfindreferences.h
@@ -64,8 +64,8 @@ Q_SIGNALS:
     void changed();
 
 public:
-    void findUsages(CPlusPlus::Symbol *symbol);
-    void renameUsages(CPlusPlus::Symbol *symbol);
+    void findUsages(CPlusPlus::Document::Ptr symbolDocument,CPlusPlus::Symbol *symbol);
+    void renameUsages(CPlusPlus::Document::Ptr symbolDocument,CPlusPlus::Symbol *symbol);
 
     void findMacroUses(const CPlusPlus::Macro &macro);
 
@@ -76,7 +76,7 @@ private Q_SLOTS:
     void onReplaceButtonClicked(const QString &text, const QList<Find::SearchResultItem> &items);
 
 private:
-    void findAll_helper(CPlusPlus::Symbol *symbol);
+    void findAll_helper(CPlusPlus::Document::Ptr symbolDocument, CPlusPlus::Symbol *symbol);
 
 private:
     QPointer<CppModelManagerInterface> _modelManager;
diff --git a/src/plugins/cpptools/cppmodelmanager.cpp b/src/plugins/cpptools/cppmodelmanager.cpp
index 0fb58e93dc..069b8e6c9d 100644
--- a/src/plugins/cpptools/cppmodelmanager.cpp
+++ b/src/plugins/cpptools/cppmodelmanager.cpp
@@ -733,16 +733,16 @@ QList<int> CppModelManager::references(CPlusPlus::Symbol *symbol,
     return m_findReferences->references(LookupContext::canonicalSymbol(symbol, glo.data()), doc, snapshot);
 }
 
-void CppModelManager::findUsages(CPlusPlus::Symbol *symbol)
+void CppModelManager::findUsages(CPlusPlus::Document::Ptr symbolDocument, CPlusPlus::Symbol *symbol)
 {
     if (symbol->identifier())
-        m_findReferences->findUsages(symbol);
+        m_findReferences->findUsages(symbolDocument, symbol);
 }
 
-void CppModelManager::renameUsages(CPlusPlus::Symbol *symbol)
+void CppModelManager::renameUsages(CPlusPlus::Document::Ptr symbolDocument, CPlusPlus::Symbol *symbol)
 {
     if (symbol->identifier())
-        m_findReferences->renameUsages(symbol);
+        m_findReferences->renameUsages(symbolDocument, symbol);
 }
 
 void CppModelManager::findMacroUsages(const CPlusPlus::Macro &macro)
diff --git a/src/plugins/cpptools/cppmodelmanager.h b/src/plugins/cpptools/cppmodelmanager.h
index 96e7ba4f01..c6369f10f2 100644
--- a/src/plugins/cpptools/cppmodelmanager.h
+++ b/src/plugins/cpptools/cppmodelmanager.h
@@ -120,8 +120,8 @@ public:
                                   CPlusPlus::Document::Ptr doc,
                                   const CPlusPlus::Snapshot &snapshot);
 
-    virtual void findUsages(CPlusPlus::Symbol *symbol);
-    virtual void renameUsages(CPlusPlus::Symbol *symbol);
+    virtual void findUsages(CPlusPlus::Document::Ptr symbolDocument, CPlusPlus::Symbol *symbol);
+    virtual void renameUsages(CPlusPlus::Document::Ptr symbolDocument, CPlusPlus::Symbol *symbol);
 
     virtual void findMacroUsages(const CPlusPlus::Macro &macro);
 
diff --git a/src/plugins/cpptools/cppmodelmanagerinterface.h b/src/plugins/cpptools/cppmodelmanagerinterface.h
index 4543825122..a08d874252 100644
--- a/src/plugins/cpptools/cppmodelmanagerinterface.h
+++ b/src/plugins/cpptools/cppmodelmanagerinterface.h
@@ -121,8 +121,8 @@ public:
                                   CPlusPlus::Document::Ptr doc,
                                   const CPlusPlus::Snapshot &snapshot) = 0;
 
-    virtual void renameUsages(CPlusPlus::Symbol *symbol) = 0;
-    virtual void findUsages(CPlusPlus::Symbol *symbol) = 0;
+    virtual void renameUsages(CPlusPlus::Document::Ptr symbolDocument, CPlusPlus::Symbol *symbol) = 0;
+    virtual void findUsages(CPlusPlus::Document::Ptr symbolDocument, CPlusPlus::Symbol *symbol) = 0;
 
     virtual void findMacroUsages(const CPlusPlus::Macro &macro) = 0;