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DEV: dev/gdb: add simple task dump

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New functions task_dump_wq and task_dump_rq can be used to dump tasks
in a wait queue or in a run queue respectively. For the wait queue (the
most common usage), one needs to pass either the thread-local's timers,
or the thread group ones for shared tasks:

  task_dump_wq &ha_tgroup_ctx[0].timers
  task_dump_wq &ha_thread_ctx[0].timers

For the run queue, task_dump_rq will take the thread's rqueue:

  task_dump_rq &ha_thread_ctx[0].rqueue

The output is  the task pointer and a dump of the task* struct per line,
then a total count at the end.
This commit is contained in:
Willy Tarreau 2026-05-27 18:49:51 +02:00
parent 837d69f8ef
commit c82ac139f4
1 changed files with 31 additions and 0 deletions
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31
dev/gdb/task.gdb Normal file
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# lists all tasks in the wait queue whose ebroot pointed to by $arg0
# e.g.
# task_dump_wq &ha_tgroup_ctx[0].timers
# task_dump_wq &ha_thread_ctx[0].timers
#
define task_dump_rq
set $tot=0
ebtree_first ($arg0)
while ($node != 0)
set $tot = $tot+1
set $p = (struct task *)((void*)$node-(long)&((struct task*)0).rq)
printf "task %p ",$p
p -pretty off -- /a *$p
ebtree_next $node
end
printf "Total: %d tasks.\n",$tot
end
define task_dump_wq
set $tot=0
ebtree_first ($arg0)
while ($node != 0)
set $tot = $tot+1
set $p = (struct task *)((void*)$node-(long)&((struct task*)0).wq)
printf "task %p ",$p
p -pretty off -- /a *$p
ebtree_next $node
end
printf "Total: %d tasks.\n",$tot
end