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 14:58:00
Last Modify:2022-05-20 07:50:19 Copyright©Brick
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函数名称：perf_addr_filter_vma_adjust

函数原型：static bool perf_addr_filter_vma_adjust(struct perf_addr_filter *filter, struct vm_area_struct *vma, struct perf_addr_filter_range *fr)

返回类型：bool

参数：

类型参数名称
struct perf_addr_filter *filter
struct vm_area_struct *vma
struct perf_addr_filter_range *fr
7813  vma_size等于The first byte after our end addresswithin vm_mm. 减Our start address within vm_mm.
7814  off等于Offset (within vm_file) in PAGE_SIZEunits 左移PAGE_SHIFT determines the page size 位
7815  file等于File we map to (can be NULL).
7817  如果非Check whether inode and address range match filter criteria.则返回:false
7820  如果offset小于off则
7821  start等于Our start address within vm_mm.
7822  size等于两数取小(vma_size, size - (off - offset))
7823  否则
7824  start等于Our start address within vm_mm. 加offset减off
7825  size等于两数取小(The first byte after our end addresswithin vm_mm. - start, size)
7828  返回:true
调用者
名称描述
__perf_addr_filters_adjust
perf_addr_filter_applyScan through mm's vmas and see if one of them matches the*@filter; if so, adjust filter's address range.* Called with mm::mmap_sem down for reading.