在load bpf程序之后,可以将指定的bpf_program attach到指定位置。比如这里将USDT的bpf_program attach到程序对应的点上 这里使用的函数是bpf_program__attach_usdt **bpf_program__attach_usdt()** is just like bpf_program__attach_uprobe_opts() except it covers USDT (User-space Statically Defined Tra...
1.Uprobe-tracer: Uprobe-based Event Tracing uprobe支持通过二进制文件的偏移值添加attach,比如 Add a probe as a new uprobe event, write a new definition to uprobe_events as below (sets a uprobe at an offset of 0x4245c0 in the executable /bin/bash): echo 'p /bin/bash:0x4245c0' > ...
uprobe的多连接支持是merged in bpf-next，但还没有发布。我希望它能进入Linux v6.6。对于较旧的内核，您将不得不依赖bpf_program__attach_uprobe：
sym="pthread_create",fn_name="do_entry")exceptException:b.attach_uprobe(name="c",sym="pthread_create",fn_name="do_entry")print("%-10s %-7s %-16s %s"%("TIME(ms)","PID","COMM","FUNC"))start_ts=0# process eventdefprint_event(cpu,data,size):globalstart_ts...
fprintf(stderr,"ERROR: bpf_program__attach failed\n"); link =NULL; gotocleanup; } read_trace_pipe(); cleanup: bpf_link__destroy(link); bpf_object__close(obj); return0; } hello_kern.c #include<uapi/linux/bpf.h> #include<linux/version.h> ...
fprintf(stderr, "ERROR: bpf_program__attach failed\n"); link = NULL; goto cleanup; } read_trace_pipe(); cleanup: bpf_link__destroy(link); bpf_object__close(obj); return 0; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. ...
添加对 uprobe, tc 等多种类型 map 的支持, 允许用标记实现添加额外 attach 信息, 例如: /// @tchook {"ifindex":1, "attach_point":"BPF_TC_INGRESS"} /// @tcopts {"handle":1, "priority":1} SEC("tc") inttc_ingress(struct __sk_buff *ctx) ...
2) 调用bpf_program__attach_kprobe_opts 4.2 bpf_program__attach_kprobe_opts 1) perf_event_open_probe找到kprobe内核函数func_name = "vfs_read",并创建对应的perf_event,注册register_kprobe 2) bpf_program__attach_perf_event_opts上面我们已经找到了"vfs_read"内核对应的函数地址,通过perf_event的fd关联...
return -1, fmt.Errorf("error loading BPF program: %v", err) } @@ -258,7 +260,7 @@ func (bpf *Module) attachProbe(evName string, attachType uint32, fnName string, func (bpf *Module) attachUProbe(evName string, attachType uint32, path string, addr uint64, fd, pid int) error...
Execute a bpftrace program on resources Usage: trace run (POD | TYPE/NAME) [-c CONTAINER] [--attach] [flags] Examples: # Count system calls using tracepoints on a specific node kubectl trace run node/kubernetes-node-emt8.c.myproject.internal -e 'kprobe:do_sys_open { printf("%s: %s...