函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\signal.c Create Date:2022-07-27 10:15:29
Last Modify:2020-03-17 13:28:47 Copyright©Brick
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函数名称：Handle magic process-wide effects of stop/continue signals

函数原型：static bool prepare_signal(int sig, struct task_struct *p, bool force)

返回类型：bool

参数：

类型参数名称
intsig
struct task_struct *p
boolforce
896  signal等于信号
900  如果see SIGNAL_* flags below 按位与group exit in progress 按位或coredump in progress 的值则
901  如果非see SIGNAL_* flags below 按位与group exit in progress 的值则返回:sig恒等于SIGKILL
906  否则如果sig_kernel_stop(sig)则
910  siginitset( & flush, sigmask(SIGCONT))
911  Remove signals in mask from the pending set and queue.* Returns 1 if any signals were found.* All callers must be holding the siglock.
912  for_each_thread(p, t)
913  Remove signals in mask from the pending set and queue.* Returns 1 if any signals were found.* All callers must be holding the siglock.
914  否则如果sig恒等于SIGCONT则
919  siginitset( & flush, SIG_KERNEL_STOP_MASK)
920  Remove signals in mask from the pending set and queue.* Returns 1 if any signals were found.* All callers must be holding the siglock.
921  for_each_thread(p, t)
922  Remove signals in mask from the pending set and queue.* Returns 1 if any signals were found.* All callers must be holding the siglock.
923  ask_clear_jobctl_pending - clear jobctl pending bits*@task: target task*@mask: pending bits to clear* Clear @mask from @task->jobctl. @mask must be subset of* %JOBCTL_PENDING_MASK. If %JOBCTL_STOP_PENDING is being cleared, other
924  如果此条件成立可能性大(为编译器优化)(!(ptrace & SEIZE used, enable new behavior ))则wake_up_state(t, __TASK_STOPPED)
926  否则ptrace_trap_notify - schedule trap to notify ptracer*@t: tracee wanting to notify tracer* This function schedules sticky ptrace trap which is cleared on the next* TRAP_STOP to notify ptracer of an event. @t must have been seized by* ptracer.
938  why等于0
939  如果see SIGNAL_* flags below 按位与job control stop in effect 则why或等于SIGNAL_CLD_CONTINUED
941  否则如果hread group stop support, overloads group_exit_code too 则why或等于Pending notifications to parent.
944  如果why则
950  signal_set_stop_flags(signal, why | SIGCONT since WCONTINUED reap )
951  hread group stop support, overloads group_exit_code too 等于0
952  hread group exit support 等于0
956  返回:非sig_ignored(p, sig, force)
调用者
名称描述
__send_signal
send_sigqueue