{"id":41901,"date":"2021-04-15T11:00:32","date_gmt":"2021-04-15T02:00:32","guid":{"rendered":"https:\/\/www.creationline.com\/?p=41901"},"modified":"2021-04-15T10:38:58","modified_gmt":"2021-04-15T01:38:58","slug":"libbpfgo%e3%81%ab%e3%82%88%e3%82%8bebpf%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%a0%e3%81%ae%e4%bd%9c%e3%82%8a%e6%96%b9-aqua-%e3%82%bb%e3%82%ad%e3%83%a5%e3%83%aa%e3%83%86%e3%82%a3-ebpf","status":"publish","type":"post","link":"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/aquasecurity\/41901","title":{"rendered":"libbpfgo\u306b\u3088\u308beBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4f5c\u308a\u65b9 #aqua #\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 #eBPF"},"content":{"rendered":"

\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672021\u5e744\u67086\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300c How to Build eBPF Programs with libbpfgo <\/a>\u300d\u306e\u65e5\u672c\u8a9e\u7ffb\u8a33\u3067\u3059\u3002<\/p>\n

\"\"<\/center><\/p>\n

libbpfgo\u306b\u3088\u308beBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4f5c\u308a\u65b9<\/h2>\n
\n

\u3053\u3053\u6570\u5e74\u3001\u79c1\u306f BCC \u3068\u3044\u3046\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u3063\u3066\u3001bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u3001\u30ed\u30fc\u30c9\u3001\u64cd\u4f5c\u3092\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u305d\u3057\u3066\u6700\u8fd1\u306b\u306a\u308a\u3001libbpf<\/a> \u3068\u547c\u3070\u308c\u308b ebpf \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306e\u3088\u308a\u826f\u3044\u65b9\u6cd5\u306b\u3064\u3044\u3066\u5b66\u3073\u307e\u3057\u305f\u3002libbpf \u30d9\u30fc\u30b9\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u958b\u767a\u3059\u308b\u969b\u306b\u5229\u7528\u3067\u304d\u308b\u3044\u304f\u3064\u304b\u306e\u826f\u3044\u30ea\u30bd\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u59cb\u3081\u3088\u3046\u3068\u3059\u308b\u3068\u304b\u306a\u308a\u5727\u5012\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u306e\u76ee\u7684\u306f\u3001libbpf \u3068\u306f\u4f55\u304b\u3001\u3069\u3046\u3084\u3063\u3066\u4f7f\u3044\u59cb\u3081\u308b\u304b\u306b\u3064\u3044\u3066\u3001\u7c21\u5358\u304b\u3064\u52b9\u679c\u7684\u306b\u8aac\u660e\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n

libbpf \u306f\u3001\u30e6\u30fc\u30b6\u30fc\u30b9\u30da\u30fc\u30b9\u3068 bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4e21\u65b9\u306b\u30a4\u30f3\u30dd\u30fc\u30c8\u3067\u304d\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002libbpf \u306f\u3001bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30ed\u30fc\u30c9\u3057\u3066\u64cd\u4f5c\u3059\u308b\u305f\u3081\u306e API \u3092\u958b\u767a\u8005\u306b\u63d0\u4f9b\u3057\u307e\u3059\u3002Linux \u30ab\u30fc\u30cd\u30eb\u306e\u30bd\u30fc\u30b9\u30c4\u30ea\u30fc\u3067\u7ba1\u7406<\/a>\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u4fe1\u983c\u3067\u304d\u308b\u30d1\u30c3\u30b1\u30fc\u30b8\u3067\u3059\u3002<\/p>\n

libbpf \u306e\u6027\u8cea\u3068\u4f7f\u3044\u65b9\u3092\u8aac\u660e\u3059\u308b\u305f\u3081\u306b\u3001\u30d7\u30ed\u30bb\u30b9\u304c mmap() \u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u3092\u4f7f\u7528\u3059\u308b\u305f\u3073\u306b\u901a\u77e5\u3055\u308c\u308b\u7c21\u5358\u306a bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u3044\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u6b21\u306b\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u305f bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30ed\u30fc\u30c9\u3057\u3001\u305d\u306e\u51fa\u529b\u3092\u30ea\u30c3\u30b9\u30f3\u3059\u308b\u30e6\u30fc\u30b6\u30fc\u30b9\u30da\u30fc\u30b9\u30d7\u30ed\u30b0\u30e9\u30e0\u3092 C \u8a00\u8a9e\u3067\u66f8\u304d\u307e\u3059\u3002<\/p>\n

\"\"<\/center><\/p>\n

bpf\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4f5c\u6210<\/h3>\n

\u307e\u305a\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\n

#include <bpf\/bpf_helpers.h><\/span><\/p>\n

#include \"vmlinux.h\"<\/span><\/p>\n

#include \"simple.h\"<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

bpf_helpers.h \u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb\u306f\u3001libbpf \u306e\u4e00\u90e8\u3067\u3059\u3002bpf_helpers.h \u306b\u306f\u3001bpf \u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u4f7f\u7528\u3067\u304d\u308b\u4fbf\u5229\u306a\u95a2\u6570\u304c\u591a\u304f\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002vmlinux.h \u306b\u3064\u3044\u3066\u306f\u3001\u88dc\u8db3\u7684\u306a\u30d6\u30ed\u30b0\u8a18\u4e8b\u3092\u66f8\u3044\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u300cvmlinux.h\u3068\u306f\u4f55\u304b\u3002\u306a\u305ceBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u3068\u3063\u3066\u91cd\u8981\u306a\u306e\u304b\u3002<\/a>\u300d\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n

simple.h \u306b\u306f\u3001bpf \u3068\u30e6\u30fc\u30b6\u30fc\u30b9\u30da\u30fc\u30b9\u306e\u30b3\u30fc\u30c9\u306b\u542b\u3081\u305f\u3044\u69cb\u9020\u4f53\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u6b21\u306e\u3088\u3046\u306a\u5358\u7d14\u306a\u3082\u306e\u3067\u3059\u3002<\/p>\n

\n\n\n\n
\n

struct process_info {   <\/span><\/p>\n

int pid;   <\/span><\/p>\n

char comm[100];<\/span><\/p>\n

};<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u6b21\u306b\u3001bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\u305f\u3073\u306b\u3001\u51fa\u529b\u3092\u30e6\u30fc\u30b6\u30fc\u30b9\u30da\u30fc\u30b9\u306b\u9001\u4fe1\u3059\u308b\u624b\u6bb5\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u306b\u3001\u30ea\u30f3\u30b0\u30d0\u30c3\u30d5\u30a1<\/a>\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n

\n\n\n\n
\n

struct { <\/span><\/p>\n

__uint(type, BPF_MAP_TYPE_RINGBUF);<\/span><\/p>\n

   __uint(max_entries, 1 << 24);<\/span><\/p>\n

} events SEC(\".maps\");<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u4f7f\u7528\u3067\u304d\u308b bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u30de\u30c3\u30d7<\/a>\u306b\u306f\u591a\u304f\u306e\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002\u30ea\u30f3\u30b0\u30d0\u30c3\u30d5\u30a1\u306f\u3001\u30ab\u30fc\u30cd\u30eb\u30b9\u30da\u30fc\u30b9\u304b\u3089\u30e6\u30fc\u30b6\u30b9\u30da\u30fc\u30b9\u3078\u30c7\u30fc\u30bf\u3092\u8ee2\u9001\u3059\u308b\u305f\u3081\u306e\u4fe1\u983c\u3067\u304d\u308b\u65b9\u6cd5\u3067\u3059\u3002\u4ee5\u524d\u306b\u3082 bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u3044\u305f\u3053\u3068\u304c\u3042\u308b\u306e\u3067\u3042\u308c\u3070\u3001\u304a\u305d\u3089\u304f perfbuffers \u3082\u898b\u305f\u3053\u3068\u304c\u3042\u308b\u3067\u3057\u3087\u3046\u3002\u4e0a\u8a18\u3067\u8a18\u8f09\u3057\u305f\u30d6\u30ed\u30b0\u8a18\u4e8b\u3067\u306f\u3001perf \u3067\u306f\u306a\u304f\u30ea\u30f3\u30b0\u30d0\u30c3\u30d5\u30a1\u3092\u4f7f\u3046\u3053\u3068\u306e\u30e1\u30ea\u30c3\u30c8\u306b\u3064\u3044\u3066\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u6700\u5f8c\u306b\u3001\u5b9f\u969b\u306e bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

\n\n\n\n
\n

SEC(\"kprobe\/sys_execve\")<\/span><\/p>\n

int kprobe__sys_execve(struct pt_regs *ctx) { <\/span><\/p>\n

__u64 id = bpf_get_current_pid_tgid();<\/span><\/p>\n

__u32 tgid = id >> 32;<\/span><\/p>\n

proc_info *process; \/\/ Reserve space on the ringbuffer for the sample process = bpf_ringbuf_reserve(&events, sizeof(proc_info), ringbuffer_flags); <\/span><\/p>\n

if (!process) { <\/span><\/p>\n

return 0; <\/span><\/p>\n

} <\/span><\/p>\n

process->pid = tgid;<\/span><\/p>\n

bpf_get_current_comm(&process->comm, 100); bpf_ringbuf_submit(process, ringbuffer_flags); <\/span><\/p>\n

return 0; <\/span><\/p>\n

}<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

bpf \u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u81ea\u4f53\u306f\u3053\u306e\u95a2\u6570\u3060\u3051\u3067\u3001\u57fa\u672c\u7684\u306b\u306f main() \u3067\u3059\u3002\u3082\u3061\u308d\u3093 main() \u4ee5\u5916\u306e\u95a2\u6570\u3092\u5b9a\u7fa9\u3057\u3066\u30a4\u30f3\u30dd\u30fc\u30c8\u3067\u304d\u307e\u3059\u304c\u3001\u305d\u306e\u5834\u5408\u306f __always_inline \u5c5e\u6027\u3067\u30de\u30fc\u30af\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u8907\u96d1\u3055\u3092\u5236\u9650\u3057\u3001bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5fc5\u305a\u7d42\u4e86\u3055\u305b\u308b\u305f\u3081\u3001\u518d\u8d77\u7684\u306a\u95a2\u6570\u306e\u5b9f\u884c\u3092\u907f\u3051\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n

\u3067\u306f\u3001\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30d6\u30ec\u30fc\u30af\u30c0\u30a6\u30f3\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

SEC(\"kprobe\/sys_mmap\")<\/span><\/p>\n

\u3053\u308c\u306f\u3001bpf_helpers.h<\/a> \u3067\u5b9a\u7fa9\u3055\u308c\u305f\u30bb\u30af\u30b7\u30e7\u30f3\u30de\u30af\u30ed\u3067\u3059\u3002\u3059\u3079\u3066\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u306f\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u305f\u30d0\u30a4\u30ca\u30ea\u306e\u3069\u306e\u90e8\u5206\u3078\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u914d\u7f6e\u3059\u308b\u304b\u3092 libbpf \u306b\u4f1d\u3048\u308b\u305f\u3081\u3001\u3053\u306e\u30de\u30af\u30ed\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u57fa\u672c\u7684\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4fee\u98fe\u540d\u3067\u3059\u3002\u53b3\u5bc6\u306a\u30eb\u30fc\u30eb\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001libbpf \u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u6163\u7fd2\u306b\u5f93\u3046\u3079\u304d\u3067\u3059\u3002\u4e0a\u8a18\u306e SEC \u30e9\u30d9\u30eb\u306f\u3001\u30ea\u30f3\u30b0\u30d0\u30c3\u30d5\u30a1\u306e\u5b9a\u7fa9\u3067\u3082\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

int kprobe__sys_mmap(struct pt_regs *ctx)<\/span><\/p>\n

\u3053\u3053\u3067\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u540d\u304c kprobe__sys_mmap<\/i> \u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u30d7\u30ed\u30b0\u30e9\u30e0\u540d\u306b\u306f\u597d\u304d\u306a\u540d\u524d\u3092\u3064\u3051\u3066\u3001\u3053\u306e\u540d\u524d\u3092\u30e6\u30fc\u30b6\u30fc\u30b9\u30da\u30fc\u30b9\u5074\u304b\u3089\u306e\u8b58\u5225\u5b50\u3068\u3057\u3066\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u7a2e\u985e<\/a>\u3054\u3068\u306b\u3001bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u4f7f\u7528\u3059\u308b\u305f\u3081\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u72ec\u81ea\u306e\u300c\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u300d\u304c\u3042\u308a\u307e\u3059\u3002bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u6dfb\u4ed8\u3067\u304d\u308b\u3055\u307e\u3056\u307e\u306a\u3082\u306e\u3068\u3001\u305d\u306e\u305f\u3081\u306b\u5229\u7528\u3067\u304d\u308b\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306b\u3064\u3044\u3066\u306e\u8a73\u3057\u3044\u8aac\u660e\u306f\u3001BPF \u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u7a2e\u985e<\/a>\u306b\u6295\u7a3f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u3053\u306e kprobe bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5834\u5408\u3001struct pt_regs<\/a> \u304c\u3042\u308a\u3001\u547c\u3073\u51fa\u3057\u305f\u30d7\u30ed\u30bb\u30b9\u306e\u4eee\u60f3\u30ec\u30b8\u30b9\u30bf\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u3053\u3053\u304b\u3089\u5148\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u3002<\/p>\n

\n\n\n\n
\n

proc_info *process <\/span><\/p>\n

process = bpf_ringbuf_reserve(&events, sizeof(proc_info), ringbuffer_flags); <\/span><\/p>\n

if (! process) { <\/span><\/p>\n

return 0; <\/span><\/p>\n

} <\/span><\/p>\n

process->pid = tgid;<\/span><\/p>\n

bpf_get_current_comm(&process->comm, 100); bpf_ringbuf_submit(process, ringbuffer_flags); <\/span><\/p>\n

return 0;<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u30ea\u30f3\u30b0\u30d0\u30c3\u30d5\u30a1\u4e0a\u306b struct process_info \u306e\u30b9\u30da\u30fc\u30b9\u3092\u78ba\u4fdd\u3057\u3001\u30d7\u30ed\u30bb\u30b9 ID \u3068\u30d7\u30ed\u30bb\u30b9\u540d\u3092\u8aad\u307f\u8fbc\u3093\u3067\u3001\u30ea\u30f3\u30b0\u30d0\u30c3\u30d5\u30a1\u4e0a\u306b\u9001\u4fe1\u3057\u307e\u3059\u3002\u4ee5\u4e0a\u3067\u3059\u3002<\/p>\n

libbpfgo\u306e\u30e6\u30fc\u30b6\u30fc\u30b9\u30da\u30fc\u30b9\u5074\u306e\u4f7f\u7528<\/h3>\n

\u30e6\u30fc\u30b6\u30fc\u30b9\u30da\u30fc\u30b9\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u76ee\u7684\u306f\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u305f bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30ed\u30fc\u30c9\u3057\u9069\u5207\u306a kprobe \u306b\u30a2\u30bf\u30c3\u30c1\u3059\u308b\u3053\u3068\u3001\u30ea\u30f3\u30b0\u30d0\u30c3\u30d5\u30a1\u304b\u3089\u306e\u51fa\u529b\u3092\u5f85\u3063\u3066\u5b8c\u4e86\u5f8c\u306b\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n

libbpf \u306f C \u8a00\u8a9e\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u306a\u306e\u3067\u3001Go \u306a\u3069\u306e\u9ad8\u30ec\u30d9\u30eb\u8a00\u8a9e\u3067\u306e\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u3082\u7c21\u5358\u306b\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u30e6\u30fc\u30b6\u30fc\u30b9\u30da\u30fc\u30b9\u306e\u30b3\u30fc\u30c9\u3092\u7d14\u7c8b\u306a C \u8a00\u8a9e\u3067\u66f8\u304d\u305f\u3044\u5834\u5408\u306f\u3001\u3053\u3061\u3089\u306e\u8a18\u4e8b<\/a>\u3092\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n

\u6700\u521d\u306e\u30b9\u30c6\u30c3\u30d7\u306f\u3001bpf \u306e\u30b3\u30fc\u30c9\u3092\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d5\u30a1\u30a4\u30eb\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n

clang -g -O2 -c -target bpf -o mybpfobject.o mybpfcode.bpf.c<\/span><\/p>\n

\u3053\u308c\u3067\u3001libbpf \u81ea\u4f53\u306e\u30e9\u30c3\u30d1\u30fc\u3067\u3042\u308b libbpfgo<\/a> \u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002libbpfgo \u306e\u76ee\u7684\u306f\u3001libbpf \u306e\u3059\u3079\u3066\u306e\u30d1\u30d6\u30ea\u30c3\u30af API \u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001Go \u8a00\u8a9e\u304b\u3089\u7c21\u5358\u306b\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3067\u3059\u3002Aqua \u306e\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e1\u3064\u3067\u3042\u308b tracee<\/a> \u304c\u5fc5\u8981\u3068\u3057\u3066\u3044\u308b\u6a5f\u80fd\u304b\u3089\u59cb\u3081\u307e\u3057\u305f\u304c\u3001\u4ed6\u306e\u3059\u3079\u3066\u306e\u6a5f\u80fd\u3082\u3059\u3050\u306b\u63d0\u4f9b\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/p>\n

\u30b3\u30fc\u30c9\u3067\u5b9f\u88c5\u3059\u308b\u524d\u306b\u3001\u3053\u308c\u304b\u3089\u3084\u308b\u3053\u3068\u3092\u5927\u307e\u304b\u306b\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

\"\"<\/center><\/p>\n

\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u3066\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\n\n\n\n
\n

bpfModule, err := bpf.NewModuleFromFile(\"mybpfobject.o\")<\/span><\/p>\n

if err != nil {<\/span><\/p>\n

panic(err)<\/span><\/p>\n

}  <\/span><\/p>\n

defer bpfModule.Close()<\/span><\/p>\n

bpfModule.BPFLoadObject()<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u6b21\u306b\u3001\u4f7f\u7528\u3057\u305f\u3044 bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u63a2\u3057(\u8907\u6570\u3092\u4e00\u3064\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d5\u30a1\u30a4\u30eb\u306b\u307e\u3068\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059)\u3001\u305d\u308c\u3092\u5fc5\u8981\u306a\u30d5\u30c3\u30af(\u3053\u3053\u3067\u306f __x64_sys_mmap<\/span> \u30ab\u30fc\u30cd\u30eb\u95a2\u6570)\u306b\u30a2\u30bf\u30c3\u30c1\u3057\u307e\u3059\u3002<\/p>\n

\n\n\n\n
\n

prog, err := bpfModule.GetProgram(\"kprobe__sys_mmap\")<\/span><\/p>\n

if err != nil {<\/span><\/p>\n

panic()   <\/span><\/p>\n

}<\/span><\/p>\n

_, err = prog.AttachKprobe(\"__x64_sys_mmap\")<\/span><\/p>\n

if err != nil { <\/span><\/p>\n

panic() <\/span><\/p>\n

}<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u305d\u3057\u3066\u6700\u5f8c\u306b\u3001\u30ea\u30f3\u30b0\u30d0\u30c3\u30d5\u30a1\u304b\u3089\u306e\u51fa\u529b\u3092\u805e\u304f\u305f\u3081\u306e Go \u30c1\u30e3\u30cd\u30eb\u3092\u8a2d\u5b9a\u3057\u3001\u30a4\u30d9\u30f3\u30c8\u3092\u53d7\u4fe1\u3057\u305f\u3089\u305d\u308c\u3092\u51fa\u529b\u3057\u307e\u3059\u3002<\/p>\n

\n\n\n\n
\n

eventsChannel := make(chan []byte)<\/span><\/p>\n

rb, err := bpfModule.InitRingBuf(\"events\", eventsChannel)<\/span><\/p>\n

if err != nil {<\/span><\/p>\n

panic()<\/span><\/p>\n

}<\/span><\/p>\n

rb.Start()<\/span><\/p>\n

for {<\/span><\/p>\n

eventBytes := <-eventsChannel<\/span><\/p>\n

pid := int(binary.LittleEndian.Uint32(eventBytes[0:4])) \/\/ Treat first 4 bytes as LittleEndian Uint32<\/span><\/p>\n

comm := string(bytes.TrimRight(eventBytes[4:], \"\\x00\")) \/\/ Remove excess 0's from comm, treat as string<\/span><\/p>\n

    fmt.Printf(\"%d %v\\n\", pid, comm)<\/span><\/p>\n

}<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u30d3\u30eb\u30c9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u884c\u3044\u307e\u3059\u3002<\/p>\n

CC=gcc CGO_CFLAGS=\"-I \/usr\/include\/bpf\" CGO_LDFLAGS=\"\/usr\/lib64\/libbpf.a\" go build -o libbpfgo-prog<\/span><\/p>\n

\u3053\u3053\u306b\u306f\u5fc5\u8981\u306a\u4f9d\u5b58\u95a2\u4fc2\u304c\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u304c\u3001\u5e78\u3044\u306a\u3053\u3068\u306b\u3001\u307b\u3068\u3093\u3069\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u30de\u30cd\u30fc\u30b8\u30e3\u3067\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002\/usr\/include\/bpf \u306f\u3001\u79c1\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u306e libbpf \u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3078\u306e\u30d1\u30b9\u3067\u3059\u3002libbpf.a \u306f\u624b\u52d5\u3067\u30d3\u30eb\u30c9\u3059\u308b\u304b\u3001\u30d1\u30c3\u30b1\u30fc\u30b8(libbpf-dev-static \u306e\u3088\u3046\u306a\u5f62)\u3067\u63d0\u4f9b\u3055\u308c\u307e\u3059\u3002\u3067\u304d\u3042\u304c\u3063\u305f\u30d0\u30a4\u30ca\u30ea\u306f libbpfgo-prog \u3068\u3044\u3046\u540d\u524d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u6700\u5f8c\u306b\u3001\u3053\u308c\u3092 root \u3067\u5b9f\u884c\u3059\u308b\u304b\u3001\u30b1\u30a4\u30d1\u30d3\u30ea\u30c6\u30a3CAP_BPF\/CAP_TRACING<\/span> (linux 5.8+)<\/span>: \u3067\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\n\n\n\n
\n

[*] sudo .\/libbpfgo-prog<\/span><\/p>\n

6400 sh<\/span><\/p>\n

6399 sh<\/span><\/p>\n

6401 node<\/span><\/p>\n

6403 sh<\/span><\/p>\n

6402 sh<\/span><\/p>\n

6404 node<\/span><\/p>\n

...<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u307e\u3068\u3081<\/h2>\n
\n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001libbpf \u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u30d8\u30eb\u30d1\u30fc\u3092\u4f7f\u3063\u3066 bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u304f\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3057\u305f\u3002\u79c1\u305f\u3061\u306e bpf \u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u3001\u30d7\u30ed\u30bb\u30b9 ID \u3084\u30b3\u30de\u30f3\u30c9\u306a\u3069\u306e\u60c5\u5831\u3092\u8aad\u307f\u53d6\u308a\u3001\u305d\u308c\u3092\u5171\u6709\u30ea\u30f3\u30b0\u30d0\u30c3\u30d5\u30a1\u306b\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002\u305d\u308c\u3092 clang \u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3001libbpfgo \u3092\u4f7f\u3063\u3066\u30ab\u30fc\u30cd\u30eb\u306b\u30ed\u30fc\u30c9\u3057\u3001\u30ea\u30f3\u30b0\u30d0\u30c3\u30d5\u30a1\u304b\u3089\u306e\u51fa\u529b\u3092\u5f85\u3061\u307e\u3059\u3002<\/p>\n

\u305c\u3072\u4e00\u5ea6 libbpfgo<\/a> \u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u4f7f\u7528\u4f8b\u3092\u898b\u308b\u306b\u306f\u3001libbpfgo \u30c6\u30b9\u30c8<\/a>\u304c\u826f\u3044\u3067\u3057\u3087\u3046\u3002\u3053\u306e\u30d6\u30ed\u30b0\u8a18\u4e8b\u306e\u305f\u3081\u306b\u66f8\u304b\u308c\u305f\u3059\u3079\u3066\u306e\u30b3\u30fc\u30c9\u306f\u3001GitHub<\/a> \u3067\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\"New\n\t\t<\/a>\n\t\t<\/span>\n\t\t