函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\trace.c Create Date:2022-07-27 13:04:27
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：trace_save_cmdline

函数原型：static int trace_save_cmdline(struct task_struct *tsk)

返回类型：int

参数：

类型参数名称
struct task_struct *tsk
2229  如果非进程ID则返回:1
2232  如果此条件成立可能性小(为编译器优化)(进程ID > This controls the default maximum pid allocated to a process)则返回:0
2241  如果非arch_spin_trylock( & trace_cmdline_lock)则返回:0
2244  idx等于map_pid_to_cmdline[进程ID]
2245  如果idx恒等于NO_CMDLINE_MAP则
2246  idx等于cmdline_idx加1的和取模cmdline_num
2254  pid等于map_cmdline_to_pid[idx]
2255  如果pid不等于NO_CMDLINE_MAP则map_pid_to_cmdline[pid]等于NO_CMDLINE_MAP
2258  map_cmdline_to_pid[idx]等于进程ID
2259  map_pid_to_cmdline[进程ID]等于idx
2261  cmdline_idx等于idx
2264  set_cmdline(idx, 是否使用FPU)
2266  arch_spin_unlock( & trace_cmdline_lock)
2268  返回:1
调用者
名称描述
tracing_record_taskinforacing_record_taskinfo - record the task info of a task*@task: task to record*@flags: TRACE_RECORD_CMDLINE for recording comm* TRACE_RECORD_TGID for recording tgid
tracing_record_taskinfo_sched_switchracing_record_taskinfo_sched_switch - record task info for sched_switch*@prev: previous task during sched_switch*@next: next task during sched_switch*@flags: TRACE_RECORD_CMDLINE for recording comm* TRACE_RECORD_TGID for recording tgid