[0.3.x] fixed : process restart raises exception

git-svn-id: https://pykd.svn.codeplex.com/svn@90463 9b283d60-5439-405e-af05-b73fd8c4d996

pykd/pykdver.h

@@ -2,7 +2,7 @@
 #define PYKD_VERSION_MAJOR      0
 #define PYKD_VERSION_MINOR      3
 #define PYKD_VERSION_SUBVERSION 0
-#define PYKD_VERSION_BUILDNO    23
+#define PYKD_VERSION_BUILDNO    24
 
 #define __VER_STR2__(x) #x
 #define __VER_STR1__(x) __VER_STR2__(x)

pykd_bootstrapper/dllmain.cpp

@@ -1,11 +1,22 @@
 // dllmain.cpp : Defines the entry point for the DLL application.
 #include "stdafx.h"
 
+
+static HMODULE  pinHandle = NULL;
+
 BOOL APIENTRY DllMain( HMODULE hModule,
                        DWORD  ul_reason_for_call,
                        LPVOID lpReserved
 					 )
 {
+	if (!pinHandle)
+	{
+		GetModuleHandleEx(
+			GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_PIN,
+			(LPCTSTR)hModule,
+			&pinHandle);
+	}
+
 	switch (ul_reason_for_call)
 	{
 	case DLL_PROCESS_ATTACH:

pykd_bootstrapper/windbgext.cpp

@@ -10,36 +10,6 @@ using namespace kdlib;
 
 ///////////////////////////////////////////////////////////////////////////////
 
-class PykdBootsTrapper: public windbg::WindbgExtension
-{
-public:
-
-    KDLIB_EXT_COMMAND_METHOD(py);
-    KDLIB_EXT_COMMAND_METHOD(install);
-    KDLIB_EXT_COMMAND_METHOD(upgrade);
-
-    virtual void setUp();
-
-    virtual void tearDown();
-
-private:
-
-    void printUsage();
-    
-    void printException();
-
-    std::string getScriptFileName(const std::string &scriptName);
-
-    std::string findScript(const std::string &fullFileName);
-
-    PyThreadState  *m_pyState;
-
-    bool  m_pykdInitialized;
-
-};
-
-///////////////////////////////////////////////////////////////////////////////
-
 class AutoRestorePyState
 {
 public:
@@ -65,6 +35,7 @@ private:
     PyThreadState*    m_state;
 };
 
+
 ///////////////////////////////////////////////////////////////////////////////
 
 class DbgOut : public  windbg::WindbgOut
@@ -105,6 +76,102 @@ public:
     }
 };
 
+
+///////////////////////////////////////////////////////////////////////////////
+
+class PythonSingleton
+{
+
+public:
+
+    static PythonSingleton* get() {
+        if (!m_instance)
+            m_instance = new PythonSingleton();
+
+        return m_instance;
+    }
+
+    void beginPythonCode()
+    {
+        PyEval_RestoreThread(m_pyState);
+    }
+
+    void endPythonCode()
+    {
+        m_pyState = PyEval_SaveThread();
+    }
+
+private:
+
+    PythonSingleton()
+    {
+        PyEval_InitThreads();
+        
+        Py_Initialize();
+        
+        python::object  main = boost::python::import("__main__");
+        
+        python::object  main_namespace = main.attr("__dict__");
+        
+        // Python debug output console helper classes
+        python::class_<::DbgOut>("dout", "dout", python::no_init)
+            .def("write", &::DbgOut::write)
+            .def("writedml", &::DbgOut::writedml)
+            .def("flush", &::DbgOut::flush)
+            .add_property("encoding", &::DbgOut::encoding);
+        
+        python::class_<::DbgIn>("din", "din", python::no_init)
+            .def("readline", &::DbgIn::readline)
+            .add_property("encoding", &::DbgIn::encoding);
+        
+        python::object       sys = python::import("sys");
+        
+        sys.attr("stdout") = python::object(::DbgOut());
+        sys.attr("stderr") = python::object(::DbgOut());
+        sys.attr("stdin") = python::object(::DbgIn());
+        
+        m_pyState = PyEval_SaveThread();
+    }
+
+    static PythonSingleton*  m_instance;
+
+    PyThreadState  *m_pyState;
+};
+
+PythonSingleton*   PythonSingleton::m_instance = 0;
+
+
+///////////////////////////////////////////////////////////////////////////////
+
+class PykdBootsTrapper: public windbg::WindbgExtension
+{
+
+public:
+
+    KDLIB_EXT_COMMAND_METHOD(py);
+    KDLIB_EXT_COMMAND_METHOD(install);
+    KDLIB_EXT_COMMAND_METHOD(upgrade);
+
+    virtual void setUp();
+
+    virtual void tearDown();
+
+private:
+
+    void printUsage();
+    
+    void printException();
+
+    std::string getScriptFileName(const std::string &scriptName);
+
+    std::string findScript(const std::string &fullFileName);
+
+
+    bool  m_pykdInitialized;
+
+};
+
+
 ///////////////////////////////////////////////////////////////////////////////
 
 class InterruptWatch : public windbg::InterruptWatch
@@ -168,12 +235,11 @@ KDLIB_EXT_COMMAND_METHOD_IMPL(PykdBootsTrapper, py)
     PyThreadState   *localState = NULL;
     PyThreadState   *globalState = NULL;
 
-    PyEval_RestoreThread(m_pyState);
-
     try {
 
         InterruptWatch  interruptWatch;
 
+        PythonSingleton::get()->beginPythonCode();
 
         std::string  scriptFileName;
         if (args.size() > 0)
@@ -182,11 +248,9 @@ KDLIB_EXT_COMMAND_METHOD_IMPL(PykdBootsTrapper, py)
 
             if (scriptFileName.empty())
             {
-                m_pyState = PyEval_SaveThread();
-
                 kdlib::eprintln(L"script file not found");
 
-                return;
+                python::throw_error_already_set();
             }
 
             global = !(global || local) ? false : global; //set local by default
@@ -279,15 +343,14 @@ KDLIB_EXT_COMMAND_METHOD_IMPL(PykdBootsTrapper, py)
         PyThreadState_Swap(globalState);
     }
 
-    m_pyState = PyEval_SaveThread();
+    PythonSingleton::get()->endPythonCode();
-
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 KDLIB_EXT_COMMAND_METHOD_IMPL(PykdBootsTrapper, install)
 {
-    PyEval_RestoreThread(m_pyState);
+    PythonSingleton::get()->beginPythonCode();
 
     try {
 
@@ -308,24 +371,21 @@ KDLIB_EXT_COMMAND_METHOD_IMPL(PykdBootsTrapper, install)
         printException();
     }
 
-    m_pyState = PyEval_SaveThread();
+    PythonSingleton::get()->endPythonCode();
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 KDLIB_EXT_COMMAND_METHOD_IMPL(PykdBootsTrapper, upgrade)
 {
-    PyEval_RestoreThread(m_pyState);
+    PythonSingleton::get()->beginPythonCode();
 
     try {
 
         InterruptWatch  interruptWatch;
 
-        // ïîëó÷àåì äîñòóï ê ãëîáàëüíîìó ìàïó ( íóæåí äëÿ âûçîâà exec_file )
         python::object       main = python::import("__main__");
-
         python::object       global(main.attr("__dict__"));
-
         python::exec("import pip\n", global);
         python::exec("pip.logger.consumers = []\n", global);
         python::exec("pip.main(['install', '--upgrade', 'pykd'])\n", global);
@@ -335,58 +395,37 @@ KDLIB_EXT_COMMAND_METHOD_IMPL(PykdBootsTrapper, upgrade)
         printException();
     }
 
-    m_pyState = PyEval_SaveThread();
+    PythonSingleton::get()->endPythonCode();
 }
 
-///////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////
 
 void PykdBootsTrapper::setUp()
 {
     WindbgExtension::setUp();
-
-    PyEval_InitThreads();
-
-    Py_Initialize();
-
-    python::object  main = boost::python::import("__main__");
-
-    python::object  main_namespace = main.attr("__dict__");
-
-    // Python debug output console helper classes
-    python::class_<::DbgOut>("dout", "dout", python::no_init)
-        .def("write", &::DbgOut::write)
-        .def("writedml", &::DbgOut::writedml)
-        .def("flush", &::DbgOut::flush)
-        .add_property("encoding", &::DbgOut::encoding);
-
-    python::class_<::DbgIn>("din", "din", python::no_init)
-        .def("readline", &::DbgIn::readline)
-        .add_property("encoding", &::DbgIn::encoding);
-
-    python::object       sys = python::import("sys");
-
-    sys.attr("stdout") = python::object(::DbgOut());
-    sys.attr("stderr") = python::object(::DbgOut());
-    sys.attr("stdin") = python::object(::DbgIn());
-
-    m_pyState = PyEval_SaveThread();
 }
 
-///////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////
 
 void PykdBootsTrapper::tearDown()
 {
-    PyEval_RestoreThread(m_pyState);
-
     if (m_pykdInitialized)
     {
+        PythonSingleton::get()->beginPythonCode();
+
+        try {
             python::object  main = python::import("__main__");
-        python::object       globalScope(main.attr("__dict__"));
+            python::object  global(main.attr("__dict__"));
-        python::exec("__import__('pykd').deinitialize()", globalScope);
+            python::exec("__import__('pykd').deinitialize()", global);
             m_pykdInitialized = false;
         }
+        catch (python::error_already_set const &)
+        {
+            printException();
+        }
 
-  //  Py_Finalize();
+        PythonSingleton::get()->endPythonCode();       
+    }
 
     WindbgExtension::tearDown();
 }