*** old/src/share/vm/gc_interface/gcCause.hpp	Tue May  8 16:12:34 2012
--- new/src/share/vm/gc_interface/gcCause.hpp	Tue May  8 16:12:32 2012

*** 86,91 ****
--- 86,122 ----
  
    // Return a string describing the GCCause.
    static const char* to_string(GCCause::Cause cause);
  };
  
+ // Helper class for doing logging that includes the GC Cause
+ // as a string.
+ class GCCauseString : StackObj {
+  private:
+    static const int length = 128;
+    char buffer[length];
+    int position;
+ 
+  public:
+    GCCauseString(const char* prefix, GCCause::Cause cause) {
+      if (PrintGCCause) {
+       position = jio_snprintf(buffer, length, "%s (%s)", prefix, GCCause::to_string(cause));
+      } else {
+       position = jio_snprintf(buffer, length, "%s", prefix);
+      }
+      assert(position > 0 && position <= length,
+        err_msg("Need to increase the buffer size in GCCauseString? %d", position));
+    }
+ 
+    GCCauseString& append(const char* str) {
+      position += jio_snprintf(buffer + position, length - position, "%", str);
+      assert(position > 0 && position <= length,
+        err_msg("Need to increase the buffer size in GCCauseString? %d", position));
+      return *this;
+    }
+ 
+    operator const char*() {
+      return buffer;
+    }
+ };
+ 
  #endif // SHARE_VM_GC_INTERFACE_GCCAUSE_HPP