[heap] Account mark-compact prologue and epilogue in GC tracer.

BUG=

Review-Url: https://chromiumcodereview.appspot.com/2442693002
Cr-Commit-Position: refs/heads/master@{#40497}

src/heap/gc-tracer.cc

@@ -524,6 +524,7 @@ void GCTracer::PrintNVP() const {
           "clear.weak_cells=%.1f "
           "clear.weak_collections=%.1f "
           "clear.weak_lists=%.1f "
+          "epilogue=%.1f "
           "evacuate=%.1f "
           "evacuate.candidates=%.1f "
           "evacuate.clean_up=%.1f "
@@ -549,6 +550,7 @@ void GCTracer::PrintNVP() const {
           "mark.wrapper_prologue=%.1f "
           "mark.wrapper_epilogue=%.1f "
           "mark.wrapper_tracing=%.1f "
+          "prologue=%.1f "
           "sweep=%.1f "
           "sweep.code=%.1f "
           "sweep.map=%.1f "
@@ -605,6 +607,7 @@ void GCTracer::PrintNVP() const {
           current_.scopes[Scope::MC_CLEAR_WEAK_CELLS],
           current_.scopes[Scope::MC_CLEAR_WEAK_COLLECTIONS],
           current_.scopes[Scope::MC_CLEAR_WEAK_LISTS],
+          current_.scopes[Scope::MC_EPILOGUE],
           current_.scopes[Scope::MC_EVACUATE],
           current_.scopes[Scope::MC_EVACUATE_CANDIDATES],
           current_.scopes[Scope::MC_EVACUATE_CLEAN_UP],
@@ -629,7 +632,7 @@ void GCTracer::PrintNVP() const {
           current_.scopes[Scope::MC_MARK_WRAPPER_PROLOGUE],
           current_.scopes[Scope::MC_MARK_WRAPPER_EPILOGUE],
           current_.scopes[Scope::MC_MARK_WRAPPER_TRACING],
-          current_.scopes[Scope::MC_SWEEP],
+          current_.scopes[Scope::MC_PROLOGUE], current_.scopes[Scope::MC_SWEEP],
           current_.scopes[Scope::MC_SWEEP_CODE],
           current_.scopes[Scope::MC_SWEEP_MAP],
           current_.scopes[Scope::MC_SWEEP_OLD],

src/heap/gc-tracer.h

@@ -49,6 +49,7 @@ enum ScavengeSpeedMode { kForAllObjects, kForSurvivedObjects };
   F(MC_CLEAR_WEAK_CELLS)                      \
   F(MC_CLEAR_WEAK_COLLECTIONS)                \
   F(MC_CLEAR_WEAK_LISTS)                      \
+  F(MC_EPILOGUE)                              \
   F(MC_EVACUATE)                              \
   F(MC_EVACUATE_CANDIDATES)                   \
   F(MC_EVACUATE_CLEAN_UP)                     \
@@ -73,6 +74,7 @@ enum ScavengeSpeedMode { kForAllObjects, kForSurvivedObjects };
   F(MC_MARK_WRAPPER_PROLOGUE)                 \
   F(MC_MARK_WRAPPER_TRACING)                  \
   F(MC_MARK_OBJECT_GROUPING)                  \
+  F(MC_PROLOGUE)                              \
   F(MC_SWEEP)                                 \
   F(MC_SWEEP_CODE)                            \
   F(MC_SWEEP_MAP)                             \

src/heap/heap.cc

@@ -1447,6 +1447,7 @@ void Heap::MarkCompact() {
 
 
 void Heap::MarkCompactEpilogue() {
+  TRACE_GC(tracer(), GCTracer::Scope::MC_EPILOGUE);
   gc_state_ = NOT_IN_GC;
 
   isolate_->counters()->objs_since_last_full()->Set(0);
@@ -1465,6 +1466,7 @@ void Heap::MarkCompactEpilogue() {
 
 
 void Heap::MarkCompactPrologue() {
+  TRACE_GC(tracer(), GCTracer::Scope::MC_PROLOGUE);
   isolate_->context_slot_cache()->Clear();
   isolate_->descriptor_lookup_cache()->Clear();
   RegExpResultsCache::Clear(string_split_cache());