[heap] Enter final pause for embedder tracer in MarkLiveObjects

src/heap/mark-compact.cc

Index: src/heap/mark-compact.cc
diff --git a/src/heap/mark-compact.cc b/src/heap/mark-compact.cc
index 41e8d03147f8f230e7af406493f9b2c3c1be51d8..427185a5c85fcae2a65df85b3b3db654150cb6de 100644
--- a/src/heap/mark-compact.cc
+++ b/src/heap/mark-compact.cc
@@ -806,8 +806,6 @@ void MarkCompactCollector::Prepare() {
     heap_->local_embedder_heap_tracer()->TracePrologue();
   }
 
-  heap_->local_embedder_heap_tracer()->EnterFinalPause();
-
   // Don't start compaction if we are in the middle of incremental
   // marking cycle. We did not collect any slots.
   if (!FLAG_never_compact && !was_marked_incrementally_) {
@@ -2440,6 +2438,8 @@ void MarkCompactCollector::MarkLiveObjects() {
 
   marking_deque()->StartUsing();
 
+  heap_->local_embedder_heap_tracer()->EnterFinalPause();
+
   {
     TRACE_GC(heap()->tracer(), GCTracer::Scope::MC_MARK_PREPARE_CODE_FLUSH);
     PrepareForCodeFlushing();