diff mbox series

[v5,10/15] tools/lib/perf: use TASK_COMM_LEN_16 instead of hard-coded 16

Message ID 20211021034603.4458-1-laoar.shao@gmail.com (mailing list archive)
State Not Applicable
Headers show
Series extend task comm from 16 to 24 for CONFIG_BASE_FULL | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch
bpf/vmtest-bpf-next-PR fail merge-conflict
bpf/vmtest-bpf success VM_Test
bpf/vmtest-bpf-PR success PR summary

Commit Message

Yafang Shao Oct. 21, 2021, 3:45 a.m. UTC 
Use TASK_COMM_LEN_16 instead of hard-coded 16 to make it more grepable.
The comm is set in perf_event__prepare_comm(), which makes the comm
always a nul terminated string, so we don't worry about whether it will
be truncated or not.

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Petr Mladek <pmladek@suse.com>
---
 tools/lib/perf/include/perf/event.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/tools/lib/perf/include/perf/event.h b/tools/lib/perf/include/perf/event.h
index 4d0c02ba3f7d..ab22b4e570c6 100644
--- a/tools/lib/perf/include/perf/event.h
+++ b/tools/lib/perf/include/perf/event.h
@@ -6,6 +6,7 @@ 
 #include <linux/types.h>
 #include <linux/limits.h>
 #include <linux/bpf.h>
+#include <linux/sched/task.h>
 #include <sys/types.h> /* pid_t */
 
 #define event_contains(obj, mem) ((obj).header.size > offsetof(typeof(obj), mem))
@@ -47,7 +48,7 @@  struct perf_record_mmap2 {
 struct perf_record_comm {
 	struct perf_event_header header;
 	__u32			 pid, tid;
-	char			 comm[16];
+	char			 comm[TASK_COMM_LEN_16];
 };
 
 struct perf_record_namespaces {
@@ -291,7 +292,7 @@  struct perf_record_itrace_start {
 
 struct perf_record_thread_map_entry {
 	__u64			 pid;
-	char			 comm[16];
+	char			 comm[TASK_COMM_LEN_16];
 };
 
 struct perf_record_thread_map {