[heap] Synchronize young generation GC with concurrent marking.

src/heap/mark-compact.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/heap/mark-compact.h"
 
 #include "src/base/atomicops.h"
 #include "src/base/bits.h"
 #include "src/base/sys-info.h"
 #include "src/code-stubs.h"
@@ skipping 2701 matching lines @@
   new_space->Flip();
   new_space->ResetAllocationInfo();
 }
 
 void MinorMarkCompactCollector::EvacuateEpilogue() {
   heap()->new_space()->set_age_mark(heap()->new_space()->top());
 }
 
 void MinorMarkCompactCollector::Evacuate() {
   TRACE_GC(heap()->tracer(), GCTracer::Scope::MC_EVACUATE);
-  Heap::RelocationLock relocation_lock(heap());
+  base::LockGuard<base::Mutex> guard(heap()->relocation_mutex());
 
   {
     TRACE_GC(heap()->tracer(), GCTracer::Scope::MC_EVACUATE_PROLOGUE);
     EvacuatePrologue();
   }
 
   {
     TRACE_GC(heap()->tracer(), GCTracer::Scope::MC_EVACUATE_COPY);
     EvacuatePagesInParallel();
   }
@@ skipping 1345 matching lines @@
 }
 
 void MarkCompactCollector::Sweeper::AddSweptPageSafe(PagedSpace* space,
                                                      Page* page) {
   base::LockGuard<base::Mutex> guard(&mutex_);
   swept_list_[space->identity()].Add(page);
 }
 
 void MarkCompactCollector::Evacuate() {
   TRACE_GC(heap()->tracer(), GCTracer::Scope::MC_EVACUATE);
-  Heap::RelocationLock relocation_lock(heap());
+  base::LockGuard<base::Mutex> guard(heap()->relocation_mutex());
 
   {
     TRACE_GC(heap()->tracer(), GCTracer::Scope::MC_EVACUATE_PROLOGUE);
     EvacuatePrologue();
   }
 
   {
     TRACE_GC(heap()->tracer(), GCTracer::Scope::MC_EVACUATE_COPY);
     EvacuationScope evacuation_scope(this);
     EvacuatePagesInParallel();
@@ skipping 539 matching lines @@
       // The target is always in old space, we don't have to record the slot in
       // the old-to-new remembered set.
       DCHECK(!heap()->InNewSpace(target));
       RecordRelocSlot(host, &rinfo, target);
     }
   }
 }
 
 }  // namespace internal
 }  // namespace v8