Heap profiler: perform a GC round before taking a snapshot

test/cctest/test-heap-profiler.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 //
 // Tests for heap profiler
 
 #ifdef ENABLE_LOGGING_AND_PROFILING
 
 #include "v8.h"
 #include "heap-profiler.h"
 #include "snapshot.h"
 #include "string-stream.h"
@@ skipping 413 matching lines @@
   bool has_A2;
   bool has_B2;
   bool has_C2;
 };
 
 }  // namespace
 
 
 static const v8::HeapGraphNode* GetGlobalObject(
     const v8::HeapSnapshot* snapshot) {
-  if (i::Snapshot::IsEnabled()) {
-    // In case if snapshots are enabled, there will present a
-    // vanilla deserealized global object, without properties
-    // added by the test code.
-    CHECK_EQ(2, snapshot->GetHead()->GetChildrenCount());
-    // Choose the global object of a bigger size.
-    const v8::HeapGraphNode* node0 =
-        snapshot->GetHead()->GetChild(0)->GetToNode();
-    const v8::HeapGraphNode* node1 =
-        snapshot->GetHead()->GetChild(1)->GetToNode();
-    return node0->GetTotalSize() > node1->GetTotalSize() ? node0 : node1;
-  } else {
-    CHECK_EQ(1, snapshot->GetHead()->GetChildrenCount());
-    return snapshot->GetHead()->GetChild(0)->GetToNode();
-  }
+  CHECK_EQ(1, snapshot->GetHead()->GetChildrenCount());
+  return snapshot->GetHead()->GetChild(0)->GetToNode();
 }
 
 
 static const v8::HeapGraphNode* GetProperty(const v8::HeapGraphNode* node,
                                             v8::HeapGraphEdge::Type type,
                                             const char* name) {
   for (int i = 0, count = node->GetChildrenCount(); i < count; ++i) {
     const v8::HeapGraphEdge* prop = node->GetChild(i);
     v8::String::AsciiValue prop_name(prop->GetName());
     if (prop->GetType() == type && strcmp(name, *prop_name) == 0)
@@ skipping 172 matching lines @@
         lazy_references_x = true;
         break;
       }
     }
   }
   CHECK(compiled_references_x);
   CHECK(!lazy_references_x);
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING