主要用来梳理内核模块的逻辑 二 使用 （1）function 使用 /sys/kernel/debug/tracing # echo nop > c...
mount -t debugfs none /sys/kernel/debugecholocal> /sys/kernel/debug/tracing/trace_clock umount /sys/kernel/debug umount /sys #脚本说明这个脚本的作用是启用Linux内核的跟踪功能,它会执行以下操作: 挂载sysfs和debugfs文件系统到/sys和/sys/kernel/debug目录。 具体来说,这个命令使用了mount工具程序,并指定...
Our monitoring detected something weird about /sys/kernel/debug/tracing/, saying that it's not accessible by the monitoring user (nrpe)? Why the permission of directory /sys/kernel/debug/tracing is 700 in RHEL8/9 while it was 755 in RHEL7?
lsof: WARNING: can't stat() tracefs file system /sys/kernel/debug/tracing Output information may be incomplete. Environment Red Hat Enterprise Linux 8. Red Hat Enterprise Linux 9. Subscriber exclusive content A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much ...
Today I ran into an issue where bpftrace reported that it couldn't find the available_filter_functions: root@b40be1747ab9:/workspaces/idw# bpftrace -l ...a very short list, followed by... No such file or directory: /sys/kernel/debug/trac...
7-143 agent[9039]: 2020-02-07 17:13:49 UTC | CORE | WARN | (pkg/collector/python/datadog_agent.go:118 in LogMessage) | disk:e5dffb8bef24336f | (disk.py:75) | Unable to get disk metrics for /sys/kernel/debug/tracing: [Errno 13] Permission denied: '/sys/kernel/debug/tracing'...
/sys/kernel/tracing # cat README tracing mini-HOWTO: # echo 0 > tracing_on //禁用trace的快速方法 # echo 1 > tracing_on //重新启用trace的快速方法 1. 重要文件: (1) trace - 缓冲区的静态内容。 要清除缓冲区,请:echo > trace
APP 进行全面的监测和绕过。本文即为对这类方案的一些探索和实践。
sys_enter_openat是linux tracepoint的名字,比较稳定的ABI函数,可以在/sys/kernel/debug/tracing/events/ 找到。总数在 perf list|wc -l 约1800多个。 kprobe attach到__x64_sys_openat 需要结合CO-RE来解决不同版本内核导致的函数(__64_sys_openat)名字或参数变化的问题。 hook到tracepoint并不总是可能的,因...
VIDEO_DXGKRNL_SYSMM_FATAL_ERROR 错误检查的值为 0x000001E4,表示 Microsoft DirectX 图形内核系统内存管理器检测到违规。