函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\livepatch\transition.c Create Date:2022-07-27 11:31:50
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Sends a fake signal to all non-kthread tasks with TIF_PATCH_PENDING set.* Kthreads with TIF_PATCH_PENDING set are woken up.

函数原型：static void klp_send_signals(void)

返回类型：void

参数：无

347  如果klp_signals_cnt恒等于SIGNALS_TIMEOUT则打印注释信息("signaling remaining tasks\n")
350  read_lock( & tasklist_lock)
351  Careful: this is a double loop, 'break' won't work as expected. (g, task)
352  如果非klp_patch_pending(task)则继续下一循环
361  如果任务标志按位与I am a kernel thread 则
366  wake_up_state(task, 睡眠态)
367  否则
372  spin_lock_irq( & siglock)
373  signal_wake_up(task, 0)
374  spin_unlock_irq( & siglock)
377  read_unlock( & tasklist_lock)
调用者
名称描述
klp_try_complete_transitionTry to switch all remaining tasks to the target patch state by walking the* stacks of sleeping tasks and looking for any to-be-patched or* to-be-unpatched functions. If such functions are found, the task can't be* switched yet.