update
diff --git a/src/core/ext/census/tracing.c b/src/core/ext/census/tracing.c
index 3b5d6da..18f8daa 100644
--- a/src/core/ext/census/tracing.c
+++ b/src/core/ext/census/tracing.c
@@ -31,15 +31,21 @@
  *
  */
 
+//#include "src/core/ext/census/tracing.h"
+
 #include <grpc/census.h>
 
+
+
 /* TODO(aveitch): These are all placeholder implementations. */
 
-int census_trace_mask(const census_context *context) {
-  return CENSUS_TRACE_MASK_NONE;
-}
+// int census_trace_mask(const census_context *context) {
+//   return CENSUS_TRACE_MASK_NONE;
+// }
 
-void census_set_trace_mask(int trace_mask) {}
+// void census_set_trace_mask(int trace_mask) {}
 
-void census_trace_print(census_context *context, uint32_t type,
-                        const char *buffer, size_t n) {}
+// void census_trace_print(census_context *context, uint32_t type,
+//                         const char *buffer, size_t n) {}
+
+// void SetTracerParams(const Params& params);
diff --git a/test/core/census/trace_context_test.c b/test/core/census/trace_context_test.c
index ee409e8..d98181c 100644
--- a/test/core/census/trace_context_test.c
+++ b/test/core/census/trace_context_test.c
@@ -227,5 +227,6 @@
   test_no_sample();
   test_buffer_size();
 
+  fprintf(stderr, "sizeof(void*): %lu\n", sizeof(void *));
   return 0;
 }