Make sure fixed typed array is always double aligned for doubles

src/heap/heap.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/v8.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/bits.h"
 #include "src/base/once.h"
@@ skipping 2693 matching lines @@
       AllocationResult allocation = AllocateMap(EXTERNAL_ONE_BYTE_STRING_TYPE,
                                                 ExternalOneByteString::kSize);
       if (!allocation.To(&obj)) return false;
       set_native_source_string_map(Map::cast(obj));
     }
 
     ALLOCATE_VARSIZE_MAP(FIXED_DOUBLE_ARRAY_TYPE, fixed_double_array)
     ALLOCATE_VARSIZE_MAP(BYTE_ARRAY_TYPE, byte_array)
     ALLOCATE_VARSIZE_MAP(FREE_SPACE_TYPE, free_space)
 
-#define ALLOCATE_EXTERNAL_ARRAY_MAP(Type, type, TYPE, ctype, size)        \
-  ALLOCATE_MAP(EXTERNAL_##TYPE##_ARRAY_TYPE, ExternalArray::kAlignedSize, \
+#define ALLOCATE_EXTERNAL_ARRAY_MAP(Type, type, TYPE, ctype, size) \
+  ALLOCATE_MAP(EXTERNAL_##TYPE##_ARRAY_TYPE, ExternalArray::kSize, \
                external_##type##_array)
 
     TYPED_ARRAYS(ALLOCATE_EXTERNAL_ARRAY_MAP)
 #undef ALLOCATE_EXTERNAL_ARRAY_MAP
 
 #define ALLOCATE_FIXED_TYPED_ARRAY_MAP(Type, type, TYPE, ctype, size) \
   ALLOCATE_VARSIZE_MAP(FIXED_##TYPE##_ARRAY_TYPE, fixed_##type##_array)
 
     TYPED_ARRAYS(ALLOCATE_FIXED_TYPED_ARRAY_MAP)
 #undef ALLOCATE_FIXED_TYPED_ARRAY_MAP
@@ skipping 883 matching lines @@
   if (profiler->is_tracking_allocations()) {
     profiler->UpdateObjectSizeEvent(object->address(), object->Size());
   }
 }
 
 
 AllocationResult Heap::AllocateExternalArray(int length,
                                              ExternalArrayType array_type,
                                              void* external_pointer,
                                              PretenureFlag pretenure) {
-  int size = ExternalArray::kAlignedSize;
+  int size = ExternalArray::kSize;
   AllocationSpace space = SelectSpace(size, pretenure);
   HeapObject* result;
   {
     AllocationResult allocation = AllocateRaw(size, space, OLD_SPACE);
     if (!allocation.To(&result)) return allocation;
   }
 
   result->set_map_no_write_barrier(MapForExternalArrayType(array_type));
   ExternalArray::cast(result)->set_length(length);
   ExternalArray::cast(result)->set_external_pointer(external_pointer);
@@ skipping 2804 matching lines @@
       static_cast<int>(object_sizes_last_time_[index]));
   CODE_AGE_LIST_COMPLETE(ADJUST_LAST_TIME_OBJECT_COUNT)
 #undef ADJUST_LAST_TIME_OBJECT_COUNT
 
   MemCopy(object_counts_last_time_, object_counts_, sizeof(object_counts_));
   MemCopy(object_sizes_last_time_, object_sizes_, sizeof(object_sizes_));
   ClearObjectStats();
 }
 }
 }  // namespace v8::internal