Initial commit to populate CoreCLR repo

[tfs-changeset: 1407945]

1 files changed, 79 insertions, 0 deletions

diff --git a/src/vm/profdetach.h b/src/vm/profdetach.h
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+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+//
+// ProfDetach.h
+// 
+
+//
+// Declaration of helper classes and structures used for Profiling API Detaching
+//
+// ======================================================================================
+
+#ifndef __PROFDETACH_H__
+#define __PROFDETACH_H__
+
+#ifdef FEATURE_PROFAPI_ATTACH_DETACH
+
+// The struct below is the medium by which RequestProfilerDetach communicates with 
+// the DetachThread about a profiler being detached.  Initial core attach / 
+// detach feature crew will have only one global instance of this struct. 
+// When we allow re-attach with neutered profilers, there will likely be a 
+// linked list of these, one per profiler in the act of being detached.
+struct ProfilerDetachInfo
+{
+    ProfilerDetachInfo();
+    void Init();
+
+    // NULL if we're not trying to detach a profiler.  Otherwise, this is the
+    // EEToProfInterfaceImpl instance we're detaching.
+    // 
+    // FUTURE: Although m_pEEToProf, when non-NULL, is always the same as
+    // g_profControlBlock.pProfInterface, that will no longer be the case once we allow
+    // re-attach with neutered profilers.
+    EEToProfInterfaceImpl * m_pEEToProf;
+
+    // Time when profiler originally called RequestProfilerDetach()
+    ULONGLONG               m_ui64DetachStartTime;
+
+    // # milliseconds hint profiler specified in RequestProfilerDetach()
+    DWORD                   m_dwExpectedCompletionMilliseconds;
+};
+
+//--------------------------------------------------------------------------
+// Static-only class to coordinate initialization of the various profiling 
+// API detaching structures, plus other utility stuff.
+//
+class ProfilingAPIDetach
+{
+public:
+    static HRESULT Initialize();
+
+    static HRESULT RequestProfilerDetach(DWORD dwExpectedCompletionMilliseconds);
+
+    static HRESULT CreateDetachThread();
+    static DWORD WINAPI ProfilingAPIDetachThreadStart(LPVOID lpParameter);
+    static void ExecuteEvacuationLoop();
+    static BOOL IsProfilerEvacuated();
+
+    static EEToProfInterfaceImpl * GetEEToProfPtr();
+
+private:
+    static ProfilerDetachInfo s_profilerDetachInfo;
+
+    // Signaled by RequestProfilerDetach() when there is detach work ready to be 
+    // done by the DetachThread
+    static CLREvent           s_eventDetachWorkAvailable;
+
+    static void SleepWhileProfilerEvacuates();
+    static void UnloadProfiler();
+
+    // Prevent instantiation of ProfilingAPIDetach objects (should be static-only)
+    ProfilingAPIDetach();
+    ~ProfilingAPIDetach();
+};
+
+#endif // FEATURE_PROFAPI_ATTACH_DETACH
+
+#endif //__PROFDETACH_H__