Mark safe points in code generator (#4640)

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

@@ -3684,4 +3684,16 @@ ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateRunnable() {
     // no-op, used by the new MM only.
 }
 
+ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_safePointFunctionEpilogue() {
+    // no-op, used by the new MM only.
+}
+
+ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_safePointWhileLoopBody() {
+    // no-op, used by the new MM only.
+}
+
+ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_safePointExceptionUnwind() {
+    // no-op, used by the new MM only.
+}
+
 } // extern "C"

kotlin-native/runtime/src/main/cpp/CompilerExport.cpp

@@ -44,4 +44,7 @@ void EnsureDeclarationsEmitted() {
     ensureUsed(CheckGlobalsAccessible);
     ensureUsed(Kotlin_mm_switchThreadStateNative);
     ensureUsed(Kotlin_mm_switchThreadStateRunnable);
+    ensureUsed(Kotlin_mm_safePointFunctionEpilogue);
+    ensureUsed(Kotlin_mm_safePointWhileLoopBody);
+    ensureUsed(Kotlin_mm_safePointExceptionUnwind);
 }

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

@@ -283,6 +283,11 @@ ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateNative();
 // Sets state of the current thread to RUNNABLE (used by the new MM).
 ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateRunnable();
 
+// Safe point callbacks from Kotlin code generator.
+void Kotlin_mm_safePointFunctionEpilogue() RUNTIME_NOTHROW;
+void Kotlin_mm_safePointWhileLoopBody() RUNTIME_NOTHROW;
+void Kotlin_mm_safePointExceptionUnwind() RUNTIME_NOTHROW;
+
 #ifdef __cplusplus
 }
 #endif

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

@@ -102,4 +102,16 @@ ForeignRefContext InitLocalForeignRef(ObjHeader* object) {
     TODO();
 }
 
+RUNTIME_NOTHROW void Kotlin_mm_safePointFunctionEpilogue() {
+    TODO();
+}
+
+RUNTIME_NOTHROW void Kotlin_mm_safePointWhileLoopBody() {
+    TODO();
+}
+
+RUNTIME_NOTHROW void Kotlin_mm_safePointExceptionUnwind() {
+    TODO();
+}
+
 } // extern "C"