函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\trace_syscalls.c Create Date:2022-07-27 13:29:10
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：print_syscall_exit

函数原型：static enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags, struct trace_event *event)

返回类型：enum print_line_t

参数：

类型参数名称
struct trace_iterator *iter
intflags
struct trace_event *event
177  s等于 The below is zeroed out in pipe_read
178  ent等于ent
183  trace等于ent
184  syscall等于nr
185  entry等于syscall_nr_to_meta(syscall)
187  如果非entry则
188  race_seq_putc - trace sequence printing of simple character*@s: trace sequence descriptor*@c: simple character to record* The tracer may use either the sequence operations or its own* copy to user routines
189  转到:out
192  如果type不等于type则
193  WARN_ON_ONCE(1)
194  返回: Relay to other output functions
197  race_seq_printf - sequence printing of trace information*@s: trace sequence descriptor*@fmt: printf format string* The tracer may use either sequence operations or its own* copy to user routines
200  out :
201  返回:Several functions return TRACE_TYPE_PARTIAL_LINE if the trace_seq* overflowed, and TRACE_TYPE_HANDLED otherwise. This helper function* simplifies those functions and keeps them in sync.