Syntax: BPF.attach_tracepoint(tp="tracepoint", fn_name="name") Instruments the kernel tracepoint described by tracepoint, and when hit, runs the BPF function name().

Jan 4, 2025 · Tracepoints are predefined hook points in the Linux kernel, and eBPF programs can be attached to these tracepoints to execute custom logic whenever the kernel reaches those points.

Feb 22, 2018 · Read on for an exploration of that environment and how it can be used to create programs and attach them to tracepoints. The BCC runtime provides a macro, TRACEPOINT_PROBE, that declares a function to be attached to a tracepoint that will be called every time the tracepoint fires.

Mar 9, 2023 · Tracepoints allow you to log information to the Output window under configurable conditions without modifying or stopping your code. This feature is supported for both managed languages (C#, Visual Basic, F#) and native code as well …

Dec 6, 2017 · Tracepoints are an attempt to overcome the case when you can't stop the program to inspect something as that will cause some behavior not to repro, by allowing a breakpoint to log information to the debug output window and continue, without pausing at the UI. You can also do this with macros, but it can be more time consuming.

Using GDB's trace and collect commands, you can specify locations in the program, called tracepoints, and arbitrary expressions to evaluate when those tracepoints are reached. Later, using the tfind command, you can examine the values those expressions had when the program hit the tracepoints.

Purpose of tracepoints ¶ A tracepoint placed in code provides a hook to call a function (probe) that you can provide at runtime. A tracepoint can be “on” (a probe is connected to it) or “off” (no probe is attached).

Aug 4, 2022 · A tracepoint/kprobe is a hook or a mark in the kernel that can be attached to a program, to detect a specified behavior and probe the kernel as defined by the program.

Aug 21, 2023 · Using the syscalls/sys_enter_openat tracepoint allows us to take the struct parameter described at /sys/kernel/debug/tracing/events/syscalls/sys_enter_openat/format as context, which makes it easier to write the program as no parameter conversion is required.

To create your own trace, you insert rows into the systracees system catalog table. A trace message is the text that the database server sends to the tracing-output file.