uprobe: Support multiple call sites for the same uprobe event

[lttng-modules.git] / lttng-tracker-pid.c

diff --git a/lttng-tracker-pid.c b/lttng-tracker-pid.c
index a62ec4e459343ea9ea615f58e78651dd7697a9e9..747aec20f25aa60dc8dfc013006809dabca1b320 100644 (file)
--- a/lttng-tracker-pid.c
+++ b/lttng-tracker-pid.c
@@ -1,23 +1,10 @@
-/*
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
  * lttng-tracker-pid.c
  *
- * LTTng Process ID trackering.
+ * LTTng Process ID tracking.
  *
  * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <linux/module.h>
@@ -25,12 +12,13 @@
 #include <linux/err.h>
 #include <linux/seq_file.h>
 #include <linux/stringify.h>
-#include <linux/rculist.h>
 #include <linux/hash.h>
 #include <linux/rcupdate.h>
 
-#include "wrapper/tracepoint.h"
-#include "lttng-events.h"
+#include <wrapper/tracepoint.h>
+#include <wrapper/rcu.h>
+#include <wrapper/list.h>
+#include <lttng-events.h>
 
 /*
  * Hash table is allocated and freed when there are no possible
@@ -59,7 +47,7 @@ bool lttng_pid_tracker_lookup(struct lttng_pid_tracker *lpf, int pid)
        uint32_t hash = hash_32(pid, 32);
 
        head = &lpf->pid_hash[hash & (LTTNG_PID_TABLE_SIZE - 1)];
-       hlist_for_each_entry_rcu_notrace(e, head, hlist) {
+       lttng_hlist_for_each_entry_rcu(e, head, hlist) {
                if (pid == e->pid)
                        return 1;       /* Found */
        }
@@ -77,7 +65,7 @@ int lttng_pid_tracker_add(struct lttng_pid_tracker *lpf, int pid)
        uint32_t hash = hash_32(pid, 32);
 
        head = &lpf->pid_hash[hash & (LTTNG_PID_TABLE_SIZE - 1)];
-       hlist_for_each_entry(e, head, hlist) {
+       lttng_hlist_for_each_entry(e, head, hlist) {
                if (pid == e->pid)
                        return -EEXIST;
        }
@@ -127,7 +115,7 @@ int lttng_pid_tracker_del(struct lttng_pid_tracker *lpf, int pid)
         * No need of _safe iteration, because we stop traversal as soon
         * as we remove the entry.
         */
-       hlist_for_each_entry(e, head, hlist) {
+       lttng_hlist_for_each_entry(e, head, hlist) {
                if (pid == e->pid) {
                        pid_tracker_del_node_rcu(e);
                        return 0;
@@ -150,7 +138,7 @@ void lttng_pid_tracker_destroy(struct lttng_pid_tracker *lpf)
                struct lttng_pid_hash_node *e;
                struct hlist_node *tmp;
 
-               hlist_for_each_entry_safe(e, tmp, head, hlist)
+               lttng_hlist_for_each_entry_safe(e, tmp, head, hlist)
                        pid_tracker_del_node(e);
        }
        kfree(lpf);