Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\trace_syscalls.c Create Date:2022-07-28 12:22:17
Last Modify:2020-03-12 14:18:49 Copyright©Brick
home page Tree
Annotation kernel can get tool activityDownload SCCTChinese

Name:reg_event_syscall_exit

Proto:static int reg_event_syscall_exit(struct trace_event_file *file, struct trace_event_call *call)

Type:int

Parameter:

TypeParameterName
struct trace_event_file *file
struct trace_event_call *call
450  tr = tr
451  ret = 0
454  num = syscall_nr
455  If WARN_ON_ONCE(num < 0 || num >= NR_syscalls) Then Return -ENOSYS
457  mutex_lock( & syscall_trace_lock)
458  If Not sys_refcount_exit Then ret = register_trace_sys_exit(ftrace_syscall_exit, tr)
460  If Not ret Then
461  cu_assign_pointer() - assign to RCU-protected pointer*@p: pointer to assign to*@v: value to assign (publish)* Assigns the specified value to the specified RCU-protected* pointer, ensuring that any concurrent RCU readers will see* any prior initialization(exit_syscall_files[num], file)
462  sys_refcount_exit++
464  mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.
465  Return ret
Caller
NameDescribe
syscall_exit_register