From 2e85f6891a978f9e036e42f54965d46d53f8487a Mon Sep 17 00:00:00 2001
From: ncteisen <ncteisen@gmail.com>
Date: Wed, 12 Jul 2017 23:10:37 -0700
Subject: Add a list_tracer functionality

---
 src/core/lib/debug/trace.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src/core/lib/debug/trace.c')

diff --git a/src/core/lib/debug/trace.c b/src/core/lib/debug/trace.c
index 4b9e3d20d2..4c9d2b8e2e 100644
--- a/src/core/lib/debug/trace.c
+++ b/src/core/lib/debug/trace.c
@@ -91,6 +91,14 @@ static void parse(const char *s) {
   gpr_free(strings);
 }
 
+static void list_tracers() {
+  gpr_log(GPR_DEBUG, "available tracers:");
+  tracer *t;
+  for (t = tracers; t; t = t->next) {
+    gpr_log(GPR_DEBUG, "\t%s", t->flag->name);
+  }
+}
+
 void grpc_tracer_init(const char *env_var) {
   char *e = gpr_getenv(env_var);
   if (e != NULL) {
@@ -113,6 +121,8 @@ int grpc_tracer_set_enabled(const char *name, int enabled) {
     for (t = tracers; t; t = t->next) {
       TRACER_SET(*t->flag, enabled);
     }
+  } else if (0 == strcmp(name, "list_tracers")) {
+    list_tracers();
   } else {
     int found = 0;
     for (t = tracers; t; t = t->next) {
-- 
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