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 13:50:48
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Event entry printers

函数原型：static enum print_line_t print_kprobe_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
1275  s等于 The below is zeroed out in pipe_read
1278  field等于ent
1279  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))
1281  如果WARN_ON_ONCE(!tp)则转到:out
1284  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
1286  如果非seq_print_ip_sym(s, ip, flags | TRACE_ITER_SYM_OFFSET)则转到:out
1289  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
1291  如果print_probe_args(s, args, nr_args, (u8 * ) & field[1], field)小于0则转到:out
1295  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
1296  out :
1297  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.