[Crash-utility] [PATCH 1/3] Fix task state bitmasks for 4.14 and later
Since Linux 4.14, kernel commit 20435d84e5 ("sched/debug: Intruduce
task_state_to_char() helper function") removed the 'stat_nam' symbol,
with which we've got the values of task state bitmasks. So now we
need to get them correctly by using 'task_state_array' again.
Signed-off-by: Kazuhito Hagio <k-hagio(a)ab.jp.nec.com>
---
task.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/task.c b/task.c
index 1b32629..164e546 100644
--- a/task.c
+++ b/task.c
@@ -5282,6 +5282,7 @@ old_defaults:
/*
* If the later version of stat_nam[] array exists that contains
* WAKING, WAKEKILL and PARKED, use it instead of task_state_array[].
+ * Available since kernel version 2.6.33 to 4.13.
*/
if (((len = get_array_length("stat_nam", NULL, 0)) > 0) &&
read_string(symbol_value("stat_nam"), buf, BUFSIZE-1) &&
@@ -5393,7 +5394,15 @@ old_defaults:
_NONINTERACTIVE_ = 64;
}
- if (THIS_KERNEL_VERSION >= LINUX(2,6,32)) {
+ if (THIS_KERNEL_VERSION >= LINUX(4,14,0)) {
+ if (valid_task_state(_PARKED_)) {
+ bitpos = _PARKED_;
+ _DEAD_ |= (bitpos << 1); /* TASK_DEAD */
+ _WAKEKILL_ = (bitpos << 2); /* TASK_WAKEKILL */
+ _WAKING_ = (bitpos << 3); /* TASK_WAKING */
+ _NOLOAD_ = (bitpos << 4); /* TASK_NOLOAD */
+ }
+ } else if (THIS_KERNEL_VERSION >= LINUX(2,6,32)) {
/*
* Account for states not listed in task_state_array[]
*/
--
1.8.3.1