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Dynamic tracing in Linux user and kernel space
https://opensource.com/article/17/7/dynamic-tracing-linux-user-and-kernel-space
The Linux kernel has a few frameworks that can help a developer probe either the kernel or user space application without recompiling the source code. Kprobe is one such dynamic method of inserting probe points within kernel code, and uprobe does so within a user application. Tracing user space using uprobe
Dynamic Tracing in Linux User and Kernel Space
https://www.linux.com/news/dynamic-tracing-linux-user-and-kernel-space/
Basically, you need to insert dynamic probe points at different locations of your source code assembly instructions. For advanced users, kernel documentation/trace and man perf provide a lot of information about different types of kernels and user space tracing mechanisms; however, average users just want a few simple steps and an example to get …
BCC - Dynamic Tracing Tools for Linux Performance …
https://www.tecmint.com/bcc-best-linux-performance-monitoring-tools/
BCC ( BPF Compiler Collection) is a powerful set of appropriate tools and example files for creating resourceful kernel tracing and manipulation programs. It utilizes extended BPF ( Berkeley Packet Filters ), initially known as eBPF which was one of the new features in Linux 3.15. BCC/BPF – Dynamic Tracing Tools for Linux Performance Monitoring. Practically, most of the …
BCC - Dynamic Tracing Tools for Linux Performance Monitoring ...
https://www.linuxtoday.com/news/bcc-dynamic-tracing-tools-for-linux-performance-monitoring-networking-and-more-2/
BCC – Dynamic Tracing Tools for Linux Performance Monitoring, Networking and More By Tecmint February 18, 2019 BCC (BPF Compiler Collection) is a powerful set of appropriate tools and example files for creating resourceful kernel tracing and manipulation programs.
Linux uprobe: User-Level Dynamic Tracing - Brendan Gregg
https://brendangregg.com/blog/2015-06-28/linux-ftrace-uprobe.html
One of the features I've been looking forward to on newer Linux kernels is uprobes: user-level dynamic tracing, which was added to Linux 3.5 and improved in Linux 3.14. It lets you trace user-level functions; for example, the return of the readline() function from all running bash shells, with the returned string: # ./uprobe 'r:bash:readline +0($retval):string' Tracing uprobe …
GitHub - iovisor/ply: Dynamic Tracing in Linux
https://github.com/iovisor/ply
A light-weight dynamic tracer for Linux that leverages the kernel's BPF VM in concert with kprobes and tracepoints to attach probes to arbitrary points in the kernel. Most tracers that generate BPF bytecode are based on the LLVM based BCC toolchain. ply on the other hand has no required external dependencies except for libc.
Dynamic Event Tracing in Linux Kernel
https://events.static.linuxfound.org/slides/lfcs2010_hiramatsu.pdf
Dynamic event tracer Based on kprobes (kprobe and kretprobe) Add/delete new events on the fly trace-event/perf-event compatible – Enable/disable, filter and record by ftrace and perf tools Put a new trace-event with register/memory arguments Function entry (symbol) + offset / function return Fetch various registers/memory/symbols
Linux Dynamic Function Instrumentation with ftrace - The …
https://thenewstack.io/linux-dynamic-function-instrumentation-with-ftrace/
At its base, ftrace (Function Tracer) is a dynamic function instrumentation infrastructure. It can be used to set dynamic traces on virtually all kernel functions, and also supports a large set of static tracepoints, used to record core kernel events. It is available in most modern Linux distributions.
GitHub - charpercyr/dyntrace: Dynamic tracing in Linux …
https://github.com/charpercyr/dyntrace
First, start the dyntraced daemon. sudo dyntraced --daemonize. Then attach to any program. If your user is not in the dyntrace group, you won't be allowed to do this command. dyntrace attach <pid or name>. Then add a tracepoint. It will log to the file /tmp/test.log. dyntrace add <pid or name>:<function name or address> log /tmp/test.log. There will be an output on the …
Introduction to Linux Tracing and its Concepts
https://linuxfoundation.org/wp-content/uploads/ezannoni-tracing-tutorial-LF-2021.pdf
Brief History Almost 20 years of Linux tracing! We are all getting older. Tracing in Linux was non existant until the mid 2000’s. Took a while to be acknowledged as a real user need Developers worried about overhead, slowdown… Developers feared of being locked into an ABI Eventually pieces started being added, fragmented approach LTT (Linux Trace Toolkit) (1998)
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