Add Medium GC Profiling Mode & ICorProfilerInfo::GetObjectReferences

src/gc/env/gcenv.ee.h

@@ -63,7 +63,7 @@ class GCToEEInterface
     static void DiagUpdateGenerationBounds();
     static void DiagGCEnd(size_t index, int gen, int reason, bool fConcurrent);
     static void DiagWalkFReachableObjects(void* gcContext);
-    static void DiagWalkSurvivors(void* gcContext);
+    static void DiagWalkSurvivors(void* gcContext, bool fCompacting);
     static void DiagWalkLOHSurvivors(void* gcContext);
     static void DiagWalkBGCSurvivors(void* gcContext);
     static void StompWriteBarrier(WriteBarrierParameters* args);

src/gc/gc.cpp

@@ -23060,7 +23060,7 @@ void gc_heap::plan_phase (int condemned_gen_number)
         assert (generation_allocation_segment (consing_gen) ==
                 ephemeral_heap_segment);
 
-        GCToEEInterface::DiagWalkSurvivors(__this);
+        GCToEEInterface::DiagWalkSurvivors(__this, true);
 
         relocate_phase (condemned_gen_number, first_condemned_address);
         compact_phase (condemned_gen_number, first_condemned_address,
@@ -23270,7 +23270,7 @@ void gc_heap::plan_phase (int condemned_gen_number)
             fix_older_allocation_area (older_gen);
         }
 
-        GCToEEInterface::DiagWalkSurvivors(__this);
+        GCToEEInterface::DiagWalkSurvivors(__this, false);
 
         gen0_big_free_spaces = 0;
         make_free_lists (condemned_gen_number);
@@ -37212,6 +37212,23 @@ void GCHeap::DiagWalkObject (Object* obj, walk_fn fn, void* context)
     }
 }
 
+void GCHeap::DiagWalkObject2 (Object* obj, walk_fn2 fn, void* context)
+{
+    uint8_t* o = (uint8_t*)obj;
+    if (o)
+    {
+        go_through_object_cl (method_table (o), o, size(o), oo,
+                                    {
+                                        if (*oo)
+                                        {
+                                            if (!fn (obj, oo, context))
+                                                return;
+                                        }
+                                    }
+            );
+    }
+}
+
 void GCHeap::DiagWalkSurvivorsWithType (void* gc_context, record_surv_fn fn, void* diag_context, walk_surv_type type)
 {
     gc_heap* hp = (gc_heap*)gc_context;

src/gc/gcenv.ee.standalone.inl

@@ -155,10 +155,10 @@ inline void GCToEEInterface::DiagWalkFReachableObjects(void* gcContext)
     g_theGCToCLR->DiagWalkFReachableObjects(gcContext);
 }
 
-inline void GCToEEInterface::DiagWalkSurvivors(void* gcContext)
+inline void GCToEEInterface::DiagWalkSurvivors(void* gcContext, bool fCompacting)
 {
     assert(g_theGCToCLR != nullptr);
-    g_theGCToCLR->DiagWalkSurvivors(gcContext);
+    g_theGCToCLR->DiagWalkSurvivors(gcContext, fCompacting);
 }
 
 inline void GCToEEInterface::DiagWalkLOHSurvivors(void* gcContext)

src/gc/gcimpl.h

@@ -210,6 +210,7 @@ class GCHeap : public IGCHeapInternal
     bool ShouldRestartFinalizerWatchDog();
 
     void DiagWalkObject (Object* obj, walk_fn fn, void* context);
+    void DiagWalkObject2 (Object* obj, walk_fn2 fn, void* context);
     void SetFinalizeRunOnShutdown(bool value);
 
 public:	// FIX 

src/gc/gcinterface.ee.h

@@ -296,7 +296,7 @@ class IGCToCLR {
     // gives the diagnostics code a chance to run. This includes LOH if we are 
     // compacting LOH.
     virtual
-    void DiagWalkSurvivors(void* gcContext) = 0;
+    void DiagWalkSurvivors(void* gcContext, bool fCompacting) = 0;
 
     // During a full GC after we discover what objects to survive on LOH,
     // gives the diagnostics code a chance to run.

src/gc/gcinterface.h

@@ -444,6 +444,7 @@ typedef enum
 } GCHeapType;
 
 typedef bool (* walk_fn)(Object*, void*);
+typedef bool (* walk_fn2)(Object*, uint8_t**, void*);
 typedef void (* gen_walk_fn)(void* context, int generation, uint8_t* range_start, uint8_t* range_end, uint8_t* range_reserved);
 typedef void (* record_surv_fn)(uint8_t* begin, uint8_t* end, ptrdiff_t reloc, void* context, bool compacting_p, bool bgc_p);
 typedef void (* fq_walk_fn)(bool, void*);
@@ -829,6 +830,9 @@ class IGCHeap {
     // Walks an object, invoking a callback on each member.
     virtual void DiagWalkObject(Object* obj, walk_fn fn, void* context) = 0;
 
+    // Walks an object, invoking a callback on each member.
+    virtual void DiagWalkObject2(Object* obj, walk_fn2 fn, void* context) = 0;
+
     // Walk the heap object by object.
     virtual void DiagWalkHeap(walk_fn fn, void* context, int gen_number, bool walk_large_object_heap_p) = 0;
 

src/gc/sample/gcenv.ee.cpp

@@ -255,7 +255,7 @@ void GCToEEInterface::DiagWalkFReachableObjects(void* gcContext)
 {
 }
 
-void GCToEEInterface::DiagWalkSurvivors(void* gcContext)
+void GCToEEInterface::DiagWalkSurvivors(void* gcContext, bool fCompacting)
 {
 }
 

src/inc/corprof.idl

@@ -629,11 +629,14 @@ typedef enum
 
     COR_PRF_HIGH_BASIC_GC                           = 0x00000010,
 
+    COR_PRF_HIGH_MEDIUM_GC                          = 0x00000020,
+
     COR_PRF_HIGH_REQUIRE_PROFILE_IMAGE              = 0,
 
     COR_PRF_HIGH_ALLOWABLE_AFTER_ATTACH             = COR_PRF_HIGH_IN_MEMORY_SYMBOLS_UPDATED | 
                                                       COR_PRF_HIGH_MONITOR_DYNAMIC_FUNCTION_UNLOADS | 
-                                                      COR_PRF_HIGH_BASIC_GC,
+                                                      COR_PRF_HIGH_BASIC_GC |
+                                                      COR_PRF_HIGH_MEDIUM_GC,
 
     // MONITOR_IMMUTABLE represents all flags that may only be set during initialization.
     // Trying to change any of these flags elsewhere will result in a
@@ -3915,6 +3918,18 @@ interface ICorProfilerInfo9 : ICorProfilerInfo8
     HRESULT GetCodeInfo4(UINT_PTR pNativeCodeStartAddress, ULONG32 cCodeInfos, ULONG32* pcCodeInfos, COR_PRF_CODE_INFO codeInfos[]);
 }
 
+[
+    object,
+    uuid(2F1B5152-C869-40C9-AA5F-3ABE026BD720),
+    pointer_default(unique),
+    local
+]
+interface ICorProfilerInfo10 : ICorProfilerInfo9
+{
+    // Given an ObjectID, fetches all its object references and offsets (if any).
+    HRESULT GetObjectReferences(ObjectID objectId, ULONG32 cNumReferences, ULONG32 *pcNumReferences, ObjectID references[], SIZE_T offsets[]);
+}
+
 /*
 * This interface lets you iterate over methods in the runtime.
 */

src/inc/profilepriv.inl

@@ -741,6 +741,20 @@ inline BOOL CORProfilerTrackBasicGC()
          ((&g_profControlBlock)->dwEventMaskHigh & COR_PRF_HIGH_BASIC_GC));
 }
 
+inline BOOL CORProfilerTrackMediumGC()
+{
+    CONTRACTL 
+    {
+        NOTHROW;
+        GC_NOTRIGGER;
+        CANNOT_TAKE_LOCK;
+    }
+    CONTRACTL_END;
+
+    return (CORProfilerPresent() &&
+         ((&g_profControlBlock)->dwEventMaskHigh & COR_PRF_HIGH_MEDIUM_GC));
+}
+
 #if defined(PROFILING_SUPPORTED) && !defined(CROSSGEN_COMPILE)
 
 #if defined(FEATURE_PROFAPI_ATTACH_DETACH)

src/pal/prebuilt/idl/corprof_i.cpp

@@ -125,7 +125,10 @@ MIDL_DEFINE_GUID(IID, IID_ICorProfilerInfo7,0x9AEECC0D,0x63E0,0x4187,0x8C,0x00,0
 MIDL_DEFINE_GUID(IID, IID_ICorProfilerInfo8,0xC5AC80A6,0x782E,0x4716,0x80,0x44,0x39,0x59,0x8C,0x60,0xCF,0xBF);
 
 
-MIDL_DEFINE_GUID(IID, IID_ICorProfilerInfo9,0X008170DB,0XF8CC,0X4796,0X9A,0X51,0XDC,0X8A,0XA0,0XB4,0X70,0x12);
+MIDL_DEFINE_GUID(IID, IID_ICorProfilerInfo9,0x008170DB,0xF8CC,0x4796,0x9A,0x51,0xDC,0x8A,0xA0,0xB4,0x70,0x12);
+
+
+MIDL_DEFINE_GUID(IID, IID_ICorProfilerInfo10,0x2F1B5152,0xC869,0x40C9,0xAA,0x5F,0x3A,0xBE,0x02,0x6B,0xD7,0x20);
 
 
 MIDL_DEFINE_GUID(IID, IID_ICorProfilerMethodEnum,0xFCCEE788,0x0088,0x454B,0xA8,0x11,0xC9,0x9F,0x29,0x8D,0x19,0x42);