feat: support tracepoint-based ebpf programs

[Godones]

支持基于tracepoint的eBPF程序

[Copilot]

Pull Request Overview

This pull request adds support for tracepoint-based eBPF programs across both user and kernel components. Key changes include:

• Introducing no_std library targets for eBPF components in the mytrace-ebpf and mytrace-common crates.
• Enhancing kernel tracepoint modules with new callback registration, raw callback support, and updated format functions for trace events.
• Updating workspace configurations, build scripts, and Makefiles to integrate these new capabilities.

Reviewed Changes

Copilot reviewed 27 out of 27 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
user/apps/test_tracepoint/mytrace-ebpf/src/lib.rs	Added no_std marker and a minimal library file for eBPF programs.
user/apps/test_tracepoint/mytrace-ebpf/build.rs	Introduced a build script to trigger rebuilds when the mtime of bpf-linker changes.
user/apps/test_tracepoint/mytrace-ebpf/Cargo.toml	Configured dependencies for the mytrace-ebpf crate.
user/apps/test_tracepoint/mytrace-common/src/lib.rs	Added no_std marker to support embedded environments.
user/apps/test_tracepoint/mytrace-common/Cargo.toml	Declared dependencies and enabled workspace features for common code.
user/apps/test_tracepoint/README.md	Updated documentation with build prerequisites and instructions.
user/apps/test_tracepoint/Makefile	Provided targets for building, testing, and installing the project.
user/apps/test_tracepoint/Cargo.toml	Set up workspace members and shared dependency versions.
kernel/src/tracepoint/*	Modified tracepoint modules for improved callback handling and safer format function usage.
kernel/src/perf/*	Added tracepoint perf integration and adjusted perf event configuration.
kernel/src/filesystem/vfs/syscall/open_utils.rs	Added trace event instrumentation for sys_openat.
kernel/src/debug/tracing/mod.rs	Updated tracing initialization with lazy file creation.
kernel/src/bpf/helper/*	Introduced a helper for probe_read_user_str and updated bpf helper function setup.

Comments suppressed due to low confidence (1)

kernel/src/tracepoint/basic_macro.rs:151

• For packed structures, consider using core::ptr::read_unaligned to safely retrieve the Entry without risking undefined behavior due to potential misalignment.

let $tp_ident = unsafe { &*(buf.as_ptr() as *const Entry) };

[fslongjin]

hello，麻烦补充一下文档，以及解决一下这几个warning~

[fslongjin]

貌似ctrl+C无法退出。可能是内核有的地方，循环读取东西的时候，没有检测是否有信号等待处理？

[fslongjin]

貌似ctrl+C无法退出。可能是内核有的地方，循环读取东西的时候，没有检测是否有信号等待处理？

#1200

我发现master分支也是这样。麻烦看看～ @sparkzky