gtest - Make a PythonTestSuite base class for setup / teardown.

This allows other potential unit test suites (of which one is
forthcoming in a subsequent patch) to re-use the same initialization
and teardown of the GIL.

llvm-svn: 252993

lldb/unittests/ScriptInterpreter/Python/PythonTestSuite.cpp

@@ -0,0 +1,42 @@
+//===-- PythonTestSuite.cpp -------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "gtest/gtest.h"
+
+#include "lldb/Host/HostInfo.h"
+#include "Plugins/ScriptInterpreter/Python/lldb-python.h"
+#include "Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.h"
+
+#include "PythonTestSuite.h"
+
+using namespace lldb_private;
+
+void
+PythonTestSuite::SetUp()
+{
+    HostInfoBase::Initialize();
+    // ScriptInterpreterPython::Initialize() depends on HostInfo being
+    // initializedso it can compute the python directory etc.
+    ScriptInterpreterPython::Initialize();
+
+    // Although we don't care about concurrency for the purposes of running
+    // this test suite, Python requires the GIL to be locked even for
+    // deallocating memory, which can happen when you call Py_DECREF or
+    // Py_INCREF.  So acquire the GIL for the entire duration of this
+    // test suite.
+    m_gil_state = PyGILState_Ensure();
+}
+
+void
+PythonTestSuite::TearDown()
+{
+    PyGILState_Release(m_gil_state);
+
+    ScriptInterpreterPython::Terminate();
+}