Implement a bit more of GC object interface

kotlin-native/runtime/src/gc/noop/cpp/NoOpGC.hpp

@@ -47,9 +47,13 @@ public:
     void SetAllocationThresholdBytes(size_t value) noexcept { allocationThresholdBytes_ = value; }
     size_t GetAllocationThresholdBytes() noexcept { return allocationThresholdBytes_; }
 
+    void SetAutoTune(bool value) noexcept { autoTune_ = value; }
+    bool GetAutoTune() noexcept { return autoTune_; }
+
 private:
     size_t threshold_ = 0;
     size_t allocationThresholdBytes_ = 0;
+    bool autoTune_ = false;
 };
 
 } // namespace gc

kotlin-native/runtime/src/gc/stms/cpp/SingleThreadMarkAndSweep.hpp

@@ -63,6 +63,9 @@ public:
     void SetAllocationThresholdBytes(size_t value) noexcept { allocationThresholdBytes_ = value; }
     size_t GetAllocationThresholdBytes() noexcept { return allocationThresholdBytes_; }
 
+    void SetAutoTune(bool value) noexcept { autoTune_ = value; }
+    bool GetAutoTune() noexcept { return autoTune_; }
+
 private:
     void PerformFullGC() noexcept;
 
@@ -70,6 +73,7 @@ private:
 
     size_t threshold_ = 1000;
     size_t allocationThresholdBytes_ = 10000;
+    bool autoTune_ = false;
 };
 
 } // namespace gc

kotlin-native/runtime/src/legacymm/cpp/Memory.cpp

@@ -3537,7 +3537,7 @@ KLong Kotlin_native_internal_GC_getThresholdAllocations(KRef) {
 #endif
 }
 
-void Kotlin_native_internal_GC_setTuneThreshold(KRef, KInt value) {
+void Kotlin_native_internal_GC_setTuneThreshold(KRef, KBoolean value) {
 #if USE_GC
   setTuneGCThreshold(value);
 #endif
@@ -3736,4 +3736,4 @@ MemoryState* kotlin::mm::GetMemoryState() {
 kotlin::ThreadState kotlin::GetThreadState(MemoryState* thread) noexcept {
     // Assume that we are always in the Runnable thread state.
     return ThreadState::kRunnable;
-}
+}

kotlin-native/runtime/src/main/cpp/Memory.h

@@ -287,7 +287,7 @@ void Kotlin_native_internal_GC_setCollectCyclesThreshold(ObjHeader*, int64_t val
 int64_t Kotlin_native_internal_GC_getCollectCyclesThreshold(ObjHeader*);
 void Kotlin_native_internal_GC_setThresholdAllocations(ObjHeader*, int64_t value);
 int64_t Kotlin_native_internal_GC_getThresholdAllocations(ObjHeader*);
-void Kotlin_native_internal_GC_setTuneThreshold(ObjHeader*, int32_t value);
+void Kotlin_native_internal_GC_setTuneThreshold(ObjHeader*, bool value);
 bool Kotlin_native_internal_GC_getTuneThreshold(ObjHeader*);
 OBJ_GETTER(Kotlin_native_internal_GC_detectCycles, ObjHeader*);
 OBJ_GETTER(Kotlin_native_internal_GC_findCycle, ObjHeader*, ObjHeader* root);

kotlin-native/runtime/src/mm/cpp/Memory.cpp

@@ -264,6 +264,25 @@ extern "C" void Kotlin_native_internal_GC_collectCyclic(ObjHeader*) {
     ThrowIllegalArgumentException();
 }
 
+// TODO: Maybe a pair of suspend/resume or start/stop may be useful in the future?
+//       The other pair is likely to be removed.
+
+extern "C" void Kotlin_native_internal_GC_suspend(ObjHeader*) {
+    // Nothing to do
+}
+
+extern "C" void Kotlin_native_internal_GC_resume(ObjHeader*) {
+    // Nothing to do
+}
+
+extern "C" void Kotlin_native_internal_GC_stop(ObjHeader*) {
+    // Nothing to do
+}
+
+extern "C" void Kotlin_native_internal_GC_start(ObjHeader*) {
+    // Nothing to do
+}
+
 extern "C" void Kotlin_native_internal_GC_setThreshold(ObjHeader*, int32_t value) {
     if (value < 0) {
         ThrowIllegalArgumentException();
@@ -306,6 +325,14 @@ extern "C" int64_t Kotlin_native_internal_GC_getThresholdAllocations(ObjHeader*)
     return static_cast<int64_t>(maxValue);
 }
 
+extern "C" void Kotlin_native_internal_GC_setTuneThreshold(ObjHeader*, KBoolean value) {
+    mm::GlobalData::Instance().gc().SetAutoTune(value);
+}
+
+extern "C" KBoolean Kotlin_native_internal_GC_getTuneThreshold(ObjHeader*) {
+    return mm::GlobalData::Instance().gc().GetAutoTune();
+}
+
 extern "C" OBJ_GETTER(Kotlin_native_internal_GC_detectCycles, ObjHeader*) {
     // TODO: Remove when legacy MM is gone.
     RETURN_OBJ(nullptr);

kotlin-native/runtime/src/mm/cpp/Stubs.cpp

@@ -9,30 +9,6 @@
 
 extern "C" {
 
-void Kotlin_native_internal_GC_suspend(ObjHeader*) {
-    TODO();
-}
-
-void Kotlin_native_internal_GC_resume(ObjHeader*) {
-    TODO();
-}
-
-void Kotlin_native_internal_GC_stop(ObjHeader*) {
-    TODO();
-}
-
-void Kotlin_native_internal_GC_start(ObjHeader*) {
-    TODO();
-}
-
-void Kotlin_native_internal_GC_setTuneThreshold(ObjHeader*, int32_t value) {
-    TODO();
-}
-
-bool Kotlin_native_internal_GC_getTuneThreshold(ObjHeader*) {
-    TODO();
-}
-
 bool TryAddHeapRef(const ObjHeader* object) {
     TODO();
 }