[heap] pause observers during mark-compact

src/heap/spaces.cc

 // Copyright 2011 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/spaces.h"
 
 #include "src/base/bits.h"
 #include "src/base/platform/platform.h"
 #include "src/full-codegen/full-codegen.h"
 #include "src/heap/slots-buffer.h"
@@ skipping 1586 matching lines @@
     Address new_top = old_top + aligned_size_in_bytes;
     Address soon_object = old_top + filler_size;
     InlineAllocationStep(new_top, new_top, soon_object, size_in_bytes);
     UpdateInlineAllocationLimit(aligned_size_in_bytes);
   }
   return true;
 }
 
 
 void NewSpace::StartNextInlineAllocationStep() {
-  DCHECK(!inline_allocation_observers_paused_);
-  top_on_previous_step_ =
-      inline_allocation_observers_.length() ? allocation_info_.top() : 0;
-  UpdateInlineAllocationLimit(0);
+  if (!inline_allocation_observers_paused_) {
+    top_on_previous_step_ =
+        inline_allocation_observers_.length() ? allocation_info_.top() : 0;
+    UpdateInlineAllocationLimit(0);
+  }
 }
 
 
 intptr_t NewSpace::GetNextInlineAllocationStepSize() {
   intptr_t next_step = 0;
   for (int i = 0; i < inline_allocation_observers_.length(); ++i) {
     InlineAllocationObserver* o = inline_allocation_observers_[i];
     next_step = next_step ? Min(next_step, o->bytes_to_next_step())
                           : o->bytes_to_next_step();
   }
@@ skipping 1701 matching lines @@
     object->ShortPrint();
     PrintF("\n");
   }
   printf(" --------------------------------------\n");
   printf(" Marked: %x, LiveCount: %x\n", mark_size, LiveBytes());
 }
 
 #endif  // DEBUG
 }  // namespace internal
 }  // namespace v8