Pass GC flags to incremental marker and start incremental marking with

reduce memory footprint in idle notification.

BUG=

Review URL: https://codereview.chromium.org/1156463002

Cr-Commit-Position: refs/heads/master@{#28567}

src/heap/heap.cc

@@ -957,7 +957,7 @@ bool Heap::CollectGarbage(GarbageCollector collector, const char* gc_reason,
   if (!mark_compact_collector()->abort_incremental_marking() &&
       incremental_marking()->IsStopped() &&
       incremental_marking()->ShouldActivateEvenWithoutIdleNotification()) {
-    incremental_marking()->Start();
+    incremental_marking()->Start(kNoGCFlags);
   }
 
   return next_gc_likely_to_collect_more;
@@ -4654,8 +4654,8 @@ bool Heap::PerformIdleTimeAction(GCIdleTimeAction action,
       break;
     case DO_INCREMENTAL_MARKING: {
       if (incremental_marking()->IsStopped()) {
-        // TODO(ulan): take reduce_memory into account.
-        incremental_marking()->Start();
+        incremental_marking()->Start(
+            action.reduce_memory ? kReduceMemoryFootprintMask : kNoGCFlags);
       }
       double remaining_idle_time_in_ms = 0.0;
       do {

src/heap/incremental-marking.cc

@@ -467,7 +467,7 @@ static void PatchIncrementalMarkingRecordWriteStubs(
 }
 
 
-void IncrementalMarking::Start() {
+void IncrementalMarking::Start(int mark_compact_flags) {
   if (FLAG_trace_incremental_marking) {
     PrintF("[IncrementalMarking] Start\n");
   }
@@ -482,7 +482,9 @@ void IncrementalMarking::Start() {
   was_activated_ = true;
 
   if (!heap_->mark_compact_collector()->sweeping_in_progress()) {
+    heap_->mark_compact_collector()->SetFlags(mark_compact_flags);
     StartMarking();
+    heap_->mark_compact_collector()->SetFlags(Heap::kNoGCFlags);
   } else {
     if (FLAG_trace_incremental_marking) {
       PrintF("[IncrementalMarking] Start sweeping.\n");
@@ -831,7 +833,7 @@ void IncrementalMarking::Epilogue() {
 
 void IncrementalMarking::OldSpaceStep(intptr_t allocated) {
   if (IsStopped() && ShouldActivateEvenWithoutIdleNotification()) {
-    Start();
+    Start(Heap::kNoGCFlags);
   } else {
     Step(allocated * kFastMarking / kInitialMarkingSpeed, GC_VIA_STACK_GUARD);
   }

src/heap/incremental-marking.h

@@ -67,7 +67,7 @@ class IncrementalMarking {
 
   bool WasActivated();
 
-  void Start();
+  void Start(int mark_compact_flags);
 
   void Stop();
 

test/cctest/cctest.h

@@ -561,7 +561,7 @@ static inline void SimulateIncrementalMarking(i::Heap* heap) {
   }
   CHECK(marking->IsMarking() || marking->IsStopped());
   if (marking->IsStopped()) {
-    marking->Start();
+    marking->Start(i::Heap::kNoGCFlags);
   }
   CHECK(marking->IsMarking());
   while (!marking->IsComplete()) {

test/cctest/test-heap.cc

@@ -2129,7 +2129,7 @@ TEST(InstanceOfStubWriteBarrier) {
 
   IncrementalMarking* marking = CcTest::heap()->incremental_marking();
   marking->Abort();
-  marking->Start();
+  marking->Start(Heap::kNoGCFlags);
 
   Handle<JSFunction> f =
       v8::Utils::OpenHandle(
@@ -2255,7 +2255,7 @@ TEST(ResetSharedFunctionInfoCountersDuringIncrementalMarking) {
 
   IncrementalMarking* marking = CcTest::heap()->incremental_marking();
   marking->Abort();
-  marking->Start();
+  marking->Start(Heap::kNoGCFlags);
   // The following calls will increment CcTest::heap()->global_ic_age().
   CcTest::isolate()->ContextDisposedNotification();
   SimulateIncrementalMarking(CcTest::heap());
@@ -2313,7 +2313,7 @@ TEST(IdleNotificationFinishMarking) {
   SimulateFullSpace(CcTest::heap()->old_space());
   IncrementalMarking* marking = CcTest::heap()->incremental_marking();
   marking->Abort();
-  marking->Start();
+  marking->Start(Heap::kNoGCFlags);
 
   CHECK_EQ(CcTest::heap()->gc_count(), 0);
 
@@ -4123,7 +4123,7 @@ TEST(IncrementalMarkingStepMakesBigProgressWithLargeObjects) {
              "};"
              "f(10 * 1024 * 1024);");
   IncrementalMarking* marking = CcTest::heap()->incremental_marking();
-  if (marking->IsStopped()) marking->Start();
+  if (marking->IsStopped()) marking->Start(Heap::kNoGCFlags);
   // This big step should be sufficient to mark the whole array.
   marking->Step(100 * MB, IncrementalMarking::NO_GC_VIA_STACK_GUARD);
   DCHECK(marking->IsComplete() ||
@@ -4851,7 +4851,7 @@ TEST(WeakCellsWithIncrementalMarking) {
     Handle<WeakCell> weak_cell = factory->NewWeakCell(value);
     CHECK(weak_cell->value()->IsFixedArray());
     IncrementalMarking* marking = heap->incremental_marking();
-    if (marking->IsStopped()) marking->Start();
+    if (marking->IsStopped()) marking->Start(Heap::kNoGCFlags);
     marking->Step(128, IncrementalMarking::NO_GC_VIA_STACK_GUARD);
     heap->CollectGarbage(NEW_SPACE);
     CHECK(weak_cell->value()->IsFixedArray());
@@ -5119,7 +5119,7 @@ TEST(Regress388880) {
   // that would cause crash.
   IncrementalMarking* marking = CcTest::heap()->incremental_marking();
   marking->Abort();
-  marking->Start();
+  marking->Start(Heap::kNoGCFlags);
   CHECK(marking->IsMarking());
 
   // Now everything is set up for crashing in JSObject::MigrateFastToFast()
@@ -5145,7 +5145,7 @@ TEST(Regress3631) {
       "}"
       "weak_map");
   if (marking->IsStopped()) {
-    marking->Start();
+    marking->Start(Heap::kNoGCFlags);
   }
   // Incrementally mark the backing store.
   Handle<JSObject> obj =