Dynamic Tracing

Linux Uprobe: A Powerful Tool for Dynamically Tracing User-Space Programs

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Linux Uprobe: A Powerful Tool for Dynamically Tracing User-Space Programs

Previously, we introduced kprobes in the Linux kernel, which is a dynamic tracing technology specifically for the Linux kernel space. In this article, we will introduce a similar technology called uprobes (User Space Probe), which, as the name suggests, focuses on dynamic tracing in the Linux user space. It allows developers to set probes at … Read more

Using SystemTap to Trace Custom Kernel Modules

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Using SystemTap to Trace Custom Kernel Modules

One Background After reading the article “Dynamic Tracing Technology Discussion” (https://blog.openresty.com.cn/cn/dynamic-tracing/), I thought about using SystemTap to trace my own developed kernel module. However, the official documentation of SystemTap (https://sourceware.org/systemtap/documentation.html) only gives examples of tracing kernel modules by using drivers from the kernel source tree, for example: probe module(“ext3”).function(“*”) { }, and indeed, the verification … Read more