The most problematic user of "->ptrace & PT_" checks is
tracehook_prepare_clone().
I need to re-check this, but iirc this hook is not needed at all since
"[PATCH 10] ptrace_report_clone: rework auto-attaching".
This patch changes it to always return 0.
---
include/linux/tracehook.h | 12 ------------
1 file changed, 12 deletions(-)
--- PU/include/linux/tracehook.h~19_DISABLE_PREPARE_CLONE 2009-08-20
20:09:25.000000000 +0200
+++ PU/include/linux/tracehook.h 2009-09-02 20:30:00.000000000 +0200
@@ -208,18 +208,6 @@ static inline void tracehook_report_exit
*/
static inline int tracehook_prepare_clone(unsigned clone_flags)
{
- if (clone_flags & CLONE_UNTRACED)
- return 0;
-
- if (clone_flags & CLONE_VFORK) {
- if (current->ptrace & PT_TRACE_VFORK)
- return PTRACE_EVENT_VFORK;
- } else if ((clone_flags & CSIGNAL) != SIGCHLD) {
- if (current->ptrace & PT_TRACE_CLONE)
- return PTRACE_EVENT_CLONE;
- } else if (current->ptrace & PT_TRACE_FORK)
- return PTRACE_EVENT_FORK;
-
return 0;
}
