函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\trace_kprobe.c Create Date:2022-07-27 13:50:50
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：print_kretprobe_event

函数原型：static enum print_line_t print_kretprobe_event(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
1305  s等于 The below is zeroed out in pipe_read
1308  field等于ent
1309  tp等于trace_probe_primary_from_call(container_of - cast a member of a structure out to the containing structure*@ptr: the pointer to the member.*@type: the type of the container struct this is embedded in.*@member: the name of the member within the struct.(event, structtrace_event_call, event))
1311  如果WARN_ON_ONCE(!tp)则转到:out
1314  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
1316  如果非seq_print_ip_sym(s, ret_ip, flags | TRACE_ITER_SYM_OFFSET)则转到:out
1319  race_seq_puts - trace sequence printing of simple string*@s: trace sequence descriptor*@str: simple string to record* The tracer may use either the sequence operations or its own* copy to user routines
1321  如果非seq_print_ip_sym(s, func, flags & ~TRACE_ITER_SYM_OFFSET)则转到:out
1324  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
1326  如果print_probe_args(s, args, nr_args, (u8 * ) & field[1], field)小于0则转到:out
1330  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
1332  out :
1333  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.