1 files changed, 114 insertions, 0 deletions
diff --git a/compilerplugins/clang/test/unnecessarylocking.cxx b/compilerplugins/clang/test/unnecessarylocking.cxx
new file mode 100644
index 000000000000..a2319623140a
--- /dev/null
+++ b/compilerplugins/clang/test/unnecessarylocking.cxx
@@ -0,0 +1,114 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <mutex>
+#include <osl/mutex.hxx>
+
+static std::mutex gSolarMutex;
+
+class SolarMutexGuard
+{
+    std::unique_lock<std::mutex> lock;
+
+public:
+    SolarMutexGuard()
+        : lock(gSolarMutex)
+    {
+    }
+};
+
+namespace test1
+{
+struct Foo
+{
+    int m_foo;
+    int bar1()
+    // expected-error@+1 {{unnecessary locking [loplugin:unnecessarylocking]}}
+    {
+        SolarMutexGuard guard;
+        return 1;
+    }
+    // no warning expected
+    int bar2()
+    {
+        SolarMutexGuard guard;
+        return m_foo;
+    }
+};
+}
+
+namespace test2
+{
+int free_function() { return 1; }
+
+struct Foo
+{
+    std::mutex m_aMutex;
+    osl::Mutex m_aOslMutex;
+    int m_foo;
+
+    int bar1()
+    // expected-error@+1 {{unnecessary locking [loplugin:unnecessarylocking]}}
+    {
+        std::unique_lock guard(m_aMutex);
+        return 1;
+    }
+    int bar2()
+    // expected-error@+1 {{unnecessary locking [loplugin:unnecessarylocking]}}
+    {
+        std::scoped_lock guard(m_aMutex);
+        return 1;
+    }
+    // no warning expected
+    int bar3()
+    {
+        std::scoped_lock guard(m_aMutex);
+        return m_foo;
+    }
+    int bar4()
+    // expected-error@+1 {{unnecessary locking [loplugin:unnecessarylocking]}}
+    {
+        ::osl::Guard<::osl::Mutex> aGuard(m_aOslMutex);
+        return 1;
+    }
+    int bar5()
+    {
+        // expected-error@+1 {{unnecessary locking [loplugin:unnecessarylocking]}}
+        {
+            std::unique_lock guard(m_aMutex);
+            return free_function();
+        }
+    }
+    osl::Mutex& getOslMutex() { return m_aOslMutex; }
+    int bar6()
+    // expected-error@+1 {{unnecessary locking [loplugin:unnecessarylocking]}}
+    {
+        ::osl::Guard<::osl::Mutex> aGuard(getOslMutex());
+        return 1;
+    }
+};
+}
+
+// Calling anything on VCLUnoHelper means we need the SolarMutex
+class VCLUnoHelper
+{
+public:
+    static int CreateToolkit();
+};
+namespace test4
+{
+// no warning expected
+void bar1()
+{
+    SolarMutexGuard guard;
+    VCLUnoHelper::CreateToolkit();
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */