X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fagent-thread.c;h=189e3ba6b671d38db58b19b6c998530ebcc3fae0;hb=5d815d51329be6b1bb54342d41d4890fe7025a59;hp=2b6f776dd1d2af6010dd9c3c4f550e6873d0280d;hpb=03e431550191df8609f921c7b4054c57ee4644d8;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/agent-thread.c b/src/bin/lttng-sessiond/agent-thread.c
index 2b6f776dd..189e3ba6b 100644
--- a/src/bin/lttng-sessiond/agent-thread.c
+++ b/src/bin/lttng-sessiond/agent-thread.c
@@ -15,7 +15,6 @@
  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#define _GNU_SOURCE
 #define _LGPL_SOURCE
 #include <assert.h>
 
@@ -33,6 +32,8 @@
 #include "session.h"
 #include "utils.h"
 
+static int agent_tracing_enabled = -1;
+
 /*
  * Note that there is not port here. It's set after this URI is parsed so we
  * can let the user define a custom one. However, localhost is ALWAYS the
@@ -224,6 +225,15 @@ error:
 	return ret;
 }
 
+bool agent_tracing_is_enabled(void)
+{
+	int enabled;
+
+	enabled = uatomic_read(&agent_tracing_enabled);
+	assert(enabled != -1);
+	return enabled == 1;
+}
+
 /*
  * This thread manage application notify communication.
  */
@@ -245,10 +255,18 @@ void *agent_thread_manage_registration(void *data)
 	/* Create pollset with size 2, quit pipe and socket. */
 	ret = sessiond_set_thread_pollset(&events, 2);
 	if (ret < 0) {
+		sessiond_notify_ready();
 		goto error_poll_create;
 	}
 
 	reg_sock = init_tcp_socket();
+	uatomic_set(&agent_tracing_enabled, !!reg_sock);
+
+	/*
+	 * Signal that the agent thread is ready. The command thread
+	 * may start to query whether or not agent tracing is enabled.
+	 */
+	sessiond_notify_ready();
 	if (!reg_sock) {
 		goto error_tcp_socket;
 	}
@@ -348,6 +366,7 @@ restart:
 	}
 
 exit:
+	uatomic_set(&agent_tracing_enabled, 0);
 	/* Whatever happens, try to delete it and exit. */
 	(void) lttng_poll_del(&events, reg_sock->fd);
 error: