PTRACE_EVENT_FORK   39 include/linux/ptrace.h #define PT_TRACE_FORK		PT_EVENT_FLAG(PTRACE_EVENT_FORK)
PTRACE_EVENT_FORK  127 include/uapi/linux/ptrace.h #define PTRACE_O_TRACEFORK	(1 << PTRACE_EVENT_FORK)
PTRACE_EVENT_FORK 2350 kernel/fork.c  			trace = PTRACE_EVENT_FORK;