Fix double PID registration race

[lttng-tools.git] / src / bin / lttng-sessiond / ust-app.h

diff --git a/src/bin/lttng-sessiond/ust-app.h b/src/bin/lttng-sessiond/ust-app.h
index 906a6a209b1e63eca442e438fbb76497d1937775..8e98082207a59f9f398a551aa5a7ad7041d45eba 100644 (file)
--- a/src/bin/lttng-sessiond/ust-app.h
+++ b/src/bin/lttng-sessiond/ust-app.h
@@ -45,17 +45,16 @@ struct ust_register_msg {
 };
 
 /*
- * Global applications HT used by the session daemon.
+ * Global applications HT used by the session daemon. This table is indexed by
+ * PID using the pid_n node and pid value of an ust_app.
  */
 struct lttng_ht *ust_app_ht;
 
-struct lttng_ht *ust_app_sock_key_map;
-
-struct ust_app_key {
-       pid_t pid;
-       int sock;
-       struct lttng_ht_node_ulong node;
-};
+/*
+ * Global applications HT used by the session daemon. This table is indexed by
+ * socket using the sock_n node and sock value of an ust_app.
+ */
+struct lttng_ht *ust_app_ht_by_sock;
 
 struct ust_app_ctx {
        int handle;
@@ -106,6 +105,8 @@ struct ust_app_session {
  * and a linked list is kept of all running traceable app.
  */
 struct ust_app {
+       int sock;
+       pid_t pid;
        pid_t ppid;
        uid_t uid;           /* User ID that owns the apps */
        gid_t gid;           /* Group ID that owns the apps */
@@ -118,8 +119,8 @@ struct ust_app {
        uint32_t v_minor;    /* Verion minor number */
        char name[17];       /* Process name (short) */
        struct lttng_ht *sessions;
-       struct lttng_ht_node_ulong node;
-       struct ust_app_key key;
+       struct lttng_ht_node_ulong pid_n;
+       struct lttng_ht_node_ulong sock_n;
 };
 
 #ifdef HAVE_LIBLTTNG_UST_CTL