--- old/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	2012-05-08 16:12:35.675445600 +0200
+++ new/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	2012-05-08 16:12:33.182303000 +0200
@@ -1252,10 +1252,7 @@
     gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps);
     TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty);
 
-    char verbose_str[128];
-    sprintf(verbose_str, "Full GC (%s)", GCCause::to_string(gc_cause()));
-    TraceTime t(verbose_str, G1Log::fine(), true, gclog_or_tty);
-
+    TraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, gclog_or_tty);
     TraceCollectorStats tcs(g1mm()->full_collection_counters());
     TraceMemoryManagerStats tms(true /* fullGC */, gc_cause());
 
@@ -3600,12 +3597,11 @@
     gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps);
     TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty);
 
-    char verbose_str[128];
-    sprintf(verbose_str, "GC pause (%s) (%s)%s",
-      GCCause::to_string(gc_cause()),
-      g1_policy()->gcs_are_young() ? "young" : "mixed",
-      g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : "");
-    TraceTime t(verbose_str, G1Log::fine() && !G1Log::finer(), true, gclog_or_tty);
+    TraceTime t(GCCauseString("GC pause", gc_cause())
+      .append(g1_policy()->gcs_are_young() ? " (young)" : " (mixed)")
+      .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""),
+      G1Log::fine() && !G1Log::finer(),
+      true, gclog_or_tty);
 
     TraceCollectorStats tcs(g1mm()->incremental_collection_counters());
     TraceMemoryManagerStats tms(false /* fullGC */, gc_cause());