Handle followfork using ptrace_setoptions if available
If PTRACE_O_TRACECLONE et al options are supported by kernel,
use them to do followfork rather than the original setbpt
method that changes registers ourselves.
* defs.h [LINUX] (handle_new_child): New function prototype.
* process.c [LINUX] (handle_new_child): New function based on the
code from internal_fork(), with a trivial change: do reparent only
for sys_clone.
[LINUX] (internal_fork): Use handle_new_child(). Do nothing if
ptrace_setoptions is in effect.
* strace.c [LINUX] (handle_ptrace_event): New function.
[LINUX] (trace): If ptrace_setoptions is in effect, then
call the new function to handle PTRACE_EVENT_* status, and
set PTRACE_SETOPTIONS when we see the initial stop of tracee.
Signed-off-by: Wang Chao <wang.chao@cn.fujitsu.com>
3 files changed