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dump: Add comment why get_task_regs for task is in such a strange place

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Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
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Pavel Emelyanov
2013-07-16 20:30:55 +04:00
parent d20089fb32
commit c2dec75bbd
1 changed files with 6 additions and 0 deletions
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6
parasite-syscall.c
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@@ -959,6 +959,12 @@ static int parasite_start_daemon(struct parasite_ctl *ctl, struct pstree_item *i
{ {
pid_t pid = ctl->pid.real; pid_t pid = ctl->pid.real;
/*
* Get task registers before going daemon, since the
* get_task_regs needs to call ptrace on _stopped_ task,
* while in daemon it is not such.
*/
if (get_task_regs(pid, ctl->regs_orig, item->core[0])) { if (get_task_regs(pid, ctl->regs_orig, item->core[0])) {
pr_err("Can't obtain regs for thread %d\n", pid); pr_err("Can't obtain regs for thread %d\n", pid);
return -1; return -1;