[heap] Fixes for heap testing

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/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/ast/context-slot-cache.h"
 #include "src/base/bits.h"
@@ skipping 5037 matching lines @@
 
   if (Page::kPageSize > MB) {
     max_semi_space_size_ = ROUND_UP(max_semi_space_size_, Page::kPageSize);
     max_old_generation_size_ =
         ROUND_UP(max_old_generation_size_, Page::kPageSize);
     max_executable_size_ = ROUND_UP(max_executable_size_, Page::kPageSize);
   }
 
   if (FLAG_stress_compaction) {
     // This will cause more frequent GCs when stressing.
-    max_semi_space_size_ = Page::kPageSize;
+    max_semi_space_size_ = MB;
   }
 
   // The new space size must be a power of two to support single-bit testing
   // for containment.
   max_semi_space_size_ =
       base::bits::RoundUpToPowerOfTwo32(max_semi_space_size_);
 
   if (FLAG_min_semi_space_size > 0) {
     int initial_semispace_size = FLAG_min_semi_space_size * MB;
     if (initial_semispace_size > max_semi_space_size_) {
@@ skipping 1460 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8