[PATCH 14/31] introduce TASK_UTRACED state
Introduce TASK_UTRACED state, will be used by utrace instead of TASK_TRACED.
Note: this state is reported as "t (tracing stop)" to the user-space to
avoid the confusion. IOW, it looks like TASK_TRACED in /proc/pid/status.
Signed-off-by: Oleg Nesterov <oleg(a)redhat.com>
---
fs/proc/array.c | 11 ++++++-----
include/linux/sched.h | 20 +++++++++++---------
2 files changed, 17 insertions(+), 14 deletions(-)
diff --git a/fs/proc/array.c b/fs/proc/array.c
index f0c0ea2..e0daec4 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -138,11 +138,12 @@ static const char * const task_state_array[] = {
"D (disk sleep)", /* 2 */
"T (stopped)", /* 4 */
"t (tracing stop)", /* 8 */
- "Z (zombie)", /* 16 */
- "X (dead)", /* 32 */
- "x (dead)", /* 64 */
- "K (wakekill)", /* 128 */
- "W (waking)", /* 256 */
+ "t (tracing stop)", /* 16 (stopped by utrace) */
+ "Z (zombie)", /* 32 */
+ "X (dead)", /* 64 */
+ "x (dead)", /* 128 */
+ "K (wakekill)", /* 256 */
+ "W (waking)", /* 512 */
};
static inline const char *get_task_state(struct task_struct *tsk)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index c6d79af..f3f0a77 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -184,16 +184,17 @@ print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
#define TASK_UNINTERRUPTIBLE 2
#define __TASK_STOPPED 4
#define __TASK_TRACED 8
+#define __TASK_UTRACED 16
/* in tsk->exit_state */
-#define EXIT_ZOMBIE 16
-#define EXIT_DEAD 32
+#define EXIT_ZOMBIE 32
+#define EXIT_DEAD 64
/* in tsk->state again */
-#define TASK_DEAD 64
-#define TASK_WAKEKILL 128
-#define TASK_WAKING 256
-#define TASK_STATE_MAX 512
+#define TASK_DEAD 128
+#define TASK_WAKEKILL 256
+#define TASK_WAKING 512
+#define TASK_STATE_MAX 1024
-#define TASK_STATE_TO_CHAR_STR "RSDTtZXxKW"
+#define TASK_STATE_TO_CHAR_STR "RSDTtUZXxKW"
extern char ___assert_task_state[1 - 2*!!(
sizeof(TASK_STATE_TO_CHAR_STR)-1 != ilog2(TASK_STATE_MAX)+1)];
@@ -202,15 +203,16 @@ extern char ___assert_task_state[1 - 2*!!(
#define TASK_KILLABLE (TASK_WAKEKILL | TASK_UNINTERRUPTIBLE)
#define TASK_STOPPED (TASK_WAKEKILL | __TASK_STOPPED)
#define TASK_TRACED (TASK_WAKEKILL | __TASK_TRACED)
+#define TASK_UTRACED (TASK_WAKEKILL | __TASK_UTRACED)
/* Convenience macros for the sake of wake_up */
#define TASK_NORMAL (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE)
-#define TASK_ALL (TASK_NORMAL | __TASK_STOPPED | __TASK_TRACED)
+#define TASK_ALL (TASK_NORMAL | __TASK_STOPPED | __TASK_TRACED | __TASK_UTRACED)
/* get_task_state() */
#define TASK_REPORT (TASK_RUNNING | TASK_INTERRUPTIBLE | \
TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \
- __TASK_TRACED)
+ __TASK_TRACED | __TASK_UTRACED)
#define task_is_traced(task) ((task->state & __TASK_TRACED) != 0)
#define task_is_stopped(task) ((task->state & __TASK_STOPPED) != 0)
--
1.5.5.1