函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\events\core.c Create Date:2022-07-27 15:02:11
Last Modify:2022-05-20 07:50:19 Copyright©Brick
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函数名称：Inherits an event group.* This will quietly suppress orphaned events; !inherit_event() is not an error.* This matches with perf_event_release_kernel() removing all child events.* Returns:* - 0 on success* - <0 on error

函数原型：static int inherit_group(struct perf_event *parent_event, struct task_struct *parent, struct perf_event_context *parent_ctx, struct task_struct *child, struct perf_event_context *child_ctx)

返回类型：int

参数：

类型参数名称
struct perf_event *parent_event
struct task_struct *parent
struct perf_event_context *parent_ctx
struct task_struct *child
struct perf_event_context *child_ctx
12185  leader等于Inherit an event from parent task to child task.* Returns:* - valid pointer on success* - NULL for orphaned events* - IS_ERR() on error
12187  如果是错误则返回:错误
12195  child_ctr等于Inherit an event from parent task to child task.* Returns:* - valid pointer on success* - NULL for orphaned events* - IS_ERR() on error
12197  如果是错误则返回:错误
12200  如果aux_event恒等于parent_event且child_ctr且非perf_get_aux_event(child_ctr, leader)则返回:负EINVAL
12204  返回:0
调用者
名称描述
inherit_task_groupCreates the child task context and tries to inherit the event-group.* Clears @inherited_all on !attr.inherited or error. Note that we'll leave* inherited_all set when we 'fail' to inherit an orphaned event; this is