[K/N] try to reimplement safe points with a load-branch-call

kotlin-native/runtime/src/main/cpp/CallsChecker.hpp

@@ -3,6 +3,8 @@
  * that can be found in the LICENSE file.
  */
 
+#pragma once
+
 #include "Common.h"
 #include "Utils.hpp"
 

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

@@ -9,6 +9,7 @@
 #include <cstdarg>
 
 #include "std_support/Span.hpp"
+#include "CallsChecker.hpp"
 #include "Format.h"
 #include "Porting.h"
 #include "StackTrace.hpp"
@@ -20,6 +21,8 @@ namespace {
 THREAD_LOCAL_VARIABLE bool assertionReportInProgress = false;
 
 void PrintAssert(bool allowStacktrace, const char* location, const char* format, std::va_list args) noexcept {
+    CallsCheckerIgnoreGuard ignoreCallsChecker;
+
     if (assertionReportInProgress) {
         // WARNING: avoid anything that can assert ar panic here
         konan::consoleErrorf("An attempt to report an assertion lead to another failure:\n");

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

@@ -129,7 +129,6 @@ int getSourceInfo(void* symbol, SourceInfo *result, int result_len) {
 // TODO: this implementation is just a hack, e.g. the result is inexact;
 // however it is better to have an inexact stacktrace than not to have any.
 NO_INLINE std_support::vector<void*> kotlin::internal::GetCurrentStackTrace(size_t skipFrames) noexcept {
-    NativeOrUnregisteredThreadGuard guard(true);
 #if KONAN_NO_BACKTRACE
     return {};
 #else
@@ -174,7 +173,6 @@ NO_INLINE std_support::vector<void*> kotlin::internal::GetCurrentStackTrace(size
 // TODO: this implementation is just a hack, e.g. the result is inexact;
 // however it is better to have an inexact stacktrace than not to have any.
 NO_INLINE size_t kotlin::internal::GetCurrentStackTrace(size_t skipFrames, std_support::span<void*> buffer) noexcept {
-    NativeOrUnregisteredThreadGuard guard(true);
 #if KONAN_NO_BACKTRACE
     return {};
 #else
@@ -276,7 +274,6 @@ KNativePtr adjustAddressForSourceInfo(KNativePtr address) { return address; }
 #endif
 
 std_support::vector<std_support::string> kotlin::GetStackTraceStrings(std_support::span<void* const> stackTrace) noexcept {
-    NativeOrUnregisteredThreadGuard guard(true);
 #if KONAN_NO_BACKTRACE
     std_support::vector<std_support::string> strings;
     strings.push_back("<UNIMPLEMENTED>");

kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/GC.kt

@@ -98,17 +98,17 @@ object GC {
     external fun start()
 
     /**
-     * GC threshold, controlling how frequenly GC is activated, and how much time GC
+     * Deprecated and unused.
+     *
+     * Legacy MM: GC threshold, controlling how frequenly GC is activated, and how much time GC
      * takes. Bigger values lead to longer GC pauses, but less GCs.
-     * Usually unused. For the on-safepoints GC scheduler counts
-     *         how many safepoints must the code pass before informing the GC scheduler.
      *
-     * Default: (old MM) 8 * 1024
-     *
-     * Default: (new MM) 100000
+     * Default: 8 * 1024
      *
      * @throws [IllegalArgumentException] when value is not positive.
      */
+    @Suppress("DEPRECATION")
+    @Deprecated("No-op in modern GC implementation")
     var threshold: Int by kotlin.native.runtime.GC::threshold
 
     /**

kotlin-native/runtime/src/main/kotlin/kotlin/native/runtime/GC.kt

@@ -99,17 +99,16 @@ public object GC {
     external fun start()
 
     /**
-     * GC threshold, controlling how frequenly GC is activated, and how much time GC
+     * Deprecated and unused.
+     *
+     * Legacy MM: GC threshold, controlling how frequenly GC is activated, and how much time GC
      * takes. Bigger values lead to longer GC pauses, but less GCs.
-     * Usually unused. For the on-safepoints GC scheduler counts
-     *         how many safepoints must the code pass before informing the GC scheduler.
      *
-     * Default: (old MM) 8 * 1024
-     *
-     * Default: (new MM) 100000
+     * Default: 8 * 1024
      *
      * @throws [IllegalArgumentException] when value is not positive.
      */
+    @Deprecated("No-op in modern GC implementation")
     var threshold: Int
         get() = getThreshold()
         set(value) {