--- old/src/share/vm/gc_interface/collectedHeap.cpp	2014-12-10 15:32:33.768025526 +0100
+++ new/src/share/vm/gc_interface/collectedHeap.cpp	2014-12-10 15:32:33.676028620 +0100
@@ -132,7 +132,7 @@
   assert_locked_or_safepoint(CodeCache_lock);
 }
 
-void CollectedHeap::trace_heap(GCWhen::Type when, GCTracer* gc_tracer) {
+void CollectedHeap::trace_heap(GCWhen::Type when, const GCTracer* gc_tracer) {
   const GCHeapSummary& heap_summary = create_heap_summary();
   gc_tracer->report_gc_heap_summary(when, heap_summary);
 
@@ -140,11 +140,11 @@
   gc_tracer->report_metaspace_summary(when, metaspace_summary);
 }
 
-void CollectedHeap::trace_heap_before_gc(GCTracer* gc_tracer) {
+void CollectedHeap::trace_heap_before_gc(const GCTracer* gc_tracer) {
   trace_heap(GCWhen::BeforeGC, gc_tracer);
 }
 
-void CollectedHeap::trace_heap_after_gc(GCTracer* gc_tracer) {
+void CollectedHeap::trace_heap_after_gc(const GCTracer* gc_tracer) {
   trace_heap(GCWhen::AfterGC, gc_tracer);
 }