{"id":26517,"date":"2025-12-05T04:25:43","date_gmt":"2025-12-05T04:25:43","guid":{"rendered":"https:\/\/pokecon.jp\/job\/?p=26517"},"modified":"2025-12-05T04:25:43","modified_gmt":"2025-12-05T04:25:43","slug":"%e4%bd%9c%e3%81%a3%e3%81%a6%e3%82%8f%e3%81%8b%e3%82%8bopentelemetry%e3%81%ae%e3%82%bc%e3%83%ad%e3%82%b3%e3%83%bc%e3%83%89%e8%a8%88%e8%a3%85-go%e8%a8%80%e8%aa%9eebpf%e7%b7%a8-mackerel-%e3%83%96","status":"publish","type":"post","link":"https:\/\/pokecon.jp\/job\/26517\/","title":{"rendered":"\u4f5c\u3063\u3066\u308f\u304b\u308bOpenTelemetry\u306e\u30bc\u30ed\u30b3\u30fc\u30c9\u8a08\u88c5 Go\u8a00\u8a9eeBPF\u7de8 – Mackerel \u30d6\u30ed\u30b0 #mackerelio"},"content":{"rendered":"\n<\/p>\n
\n

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

OpenTelemetry\u3067\u306feBPF\u3068\u3044\u3046\u6280\u8853\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u3001Go\u8a00\u8a9e\u3067\u3067\u304d\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30b3\u30fc\u30c9\u3092\u5909\u66f4\u305b\u305a\u306b\u89b3\u6e2c\u53ef\u80fd\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u305d\u306e\u624b\u6cd5\u3068\u4ed5\u7d44\u307f\u306b\u3064\u3044\u3066\u5b9f\u969b\u306b\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u306a\u304c\u3089\u89e3\u8aac\u3057\u307e\u3059\u3002<\/strong><\/p>\n

\u3053\u3093\u306b\u3061\u306f\u3002Mackerel\u30c1\u30fc\u30e0\u3067\u30a2\u30eb\u30d0\u30a4\u30c8\u3092\u3057\u3066\u3044\u308b\u30a8\u30f3\u30b8\u30cb\u30a2\u306e \"\"id:appare45<\/a> \u3067\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306fOpenTelemetry\u306e\u30bc\u30ed\u30b3\u30fc\u30c9\u8a08\u88c5\u3092\u3001Go\u8a00\u8a9e\u3067\u3067\u304d\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u5bfe\u3057\u3066eBPF\u3092\u7528\u3044\u3066\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3001\u5b9f\u969b\u306b\u5b9f\u88c5\u3057\u306a\u304c\u3089\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

\u30bc\u30ed\u30b3\u30fc\u30c9\u8a08\u88c5\u3068\u306f<\/h2>\n

\u30aa\u30d6\u30b6\u30fc\u30d0\u30d3\u30ea\u30c6\u30a3\u306b\u304a\u3051\u308b\u30bc\u30ed\u30b3\u30fc\u30c9\u8a08\u88c5<\/strong>\u3068\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30b3\u30fc\u30c9\u3092\u5909\u66f4\u305b\u305a\u306b\u3001\u30c8\u30ec\u30fc\u30b9\u3084\u30e1\u30c8\u30ea\u30c3\u30af\u306e\u3088\u3046\u306a\u30b7\u30b0\u30ca\u30eb\u3092\u751f\u6210\u3059\u308b\u6280\u8853\u3067\u3059\u3002\u30b3\u30fc\u30c9\u3092\u5909\u66f4\u3057\u305f\u308a\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u76f4\u3057\u305f\u308a\u3059\u308b\u5fc5\u8981\u304c\u306a\u3044\u305f\u3081\u3001\u624b\u9593\u304c\u5c11\u306a\u304f\u624b\u8efd\u306b\u30aa\u30d6\u30b6\u30fc\u30d0\u30d3\u30ea\u30c6\u30a3\u3092\u59cb\u3081\u3089\u308c\u308b\u3053\u3068\u304c\u7279\u5fb4\u3067\u3059\u3002<\/p>\n

\u4f8b\u3048\u3070\u3001\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u5bfe\u3057\u3066\u30c8\u30ec\u30fc\u30b9\u3092\u53d6\u5f97\u3059\u308b\u5834\u5408\u3001\u901a\u5e38\u306f\u6b21\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\nfunc<\/span> initTracerProvider(ctx context.Context) (func<\/span>(context.Context) error<\/span>, error<\/span>) {\n  client := otlptracehttp.NewClient(\n    otlptracehttp.WithEndpoint(\"otlp-vaxila.mackerelio.com\"<\/span>),\n    otlptracehttp.WithHeaders(map<\/span>[string<\/span>]string<\/span>{\n      \"Accept\"<\/span>:         \"*\/*\"<\/span>,\n      \"Mackerel-Api-Key\"<\/span>: os.Getenv(\"MACKEREL_API_KEY\"<\/span>),\n    }),\n    otlptracehttp.WithCompression(otlptracehttp.GzipCompression),\n  )\n  exporter, err := otlptrace.New(ctx, client)\n  if<\/span> err != nil<\/span> {\n    return<\/span> nil<\/span>, err\n  }\n  tp := trace.NewTracerProvider(\n    trace.WithBatcher(exporter),\n  )\n  otel.SetTracerProvider(tp)\n  otel.SetTextMapPropagator(propagation.TraceContext{})\n  return<\/span> tp.Shutdown, nil<\/span>\n}\n\nfunc<\/span> main() {\n  ctx := context.Background()\n  shutdown, err := initTracerProvider(ctx)\n  if<\/span> err != nil<\/span> {\n    panic<\/span>(err)\n  }\n  defer<\/span> shutdown(ctx)\n  otelHandler := otelhttp.NewHandler( \n    http.HandlerFunc(awesomeActionHandler),\n    \"awesome_span_name\"<\/span>,\n  )\n  http.Handle(\"\/awesome_path\/\"<\/span>, otelHandler)\n  http.ListenAndServe(\":80\"<\/span>, nil<\/span>)\n}\n...\n<\/pre>\n
\u4e00\u65b9\u30bc\u30ed\u30b3\u30fc\u30c9\u8a08\u88c5\u3092\u4f7f\u3046\u3068\u3001\u6b21\u306e\u3088\u3046\u306a\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3060\u3051\u3067\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30b3\u30fc\u30c9\u3092\u5909\u66f4\u305b\u305a\u306b\u30c8\u30ec\u30fc\u30b9\u3092\u53d6\u5f97\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
# https:\/\/github.com\/open-telemetry\/opentelemetry-go-instrumentation\/blob\/main\/docs\/getting-started.md#steps\n$ sudo OTEL_GO_AUTO_TARGET_EXE=\/home\/bin\/service_executable OTEL_SERVICE_NAME=my_service OTEL_EXPORTER_OTLP_ENDPOINT=http:\/\/localhost:4318 .\/otel-go-instrumentation <\/pre>\n
\u672c\u8a18\u4e8b\u3067\u306f\u3069\u306e\u3088\u3046\u306b\u3057\u3066\u30bc\u30ed\u30b3\u30fc\u30c9\u8a08\u88c5\u304c\u5b9f\u73fe\u3055\u308c\u3066\u3044\u308b\u306e\u304b\u3001eBPF\u3092\u7528\u3044\u305f\u4ed5\u7d44\u307f\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n
eBPF\u3068\u306f<\/h2>\n
eBPF<\/strong>\u3068\u306fLinux\u30ab\u30fc\u30cd\u30eb\u306b\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3044\u308b\u3001\u30ab\u30fc\u30cd\u30eb\u306e\u6319\u52d5\u3092\u52d5\u7684\u306b\u5909\u66f4\u3067\u304d\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002eBPF\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u3001\u30ab\u30fc\u30cd\u30eb\u306e\u30b3\u30fc\u30c9\u3092\u76f4\u63a5\u66f8\u304d\u63db\u3048\u308b\u3053\u3068\u306a\u304f\u3001\u7c21\u5358\u304b\u3064\u5b89\u5168\u306bOS\u306e\u6319\u52d5\u3092\u5909\u66f4\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u30e6\u30fc\u30b6\u30fc\u304ceBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u3001\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d1\u30b1\u30c3\u30c8\u306e\u5230\u9054\u306a\u3069\u306e\u30a4\u30d9\u30f3\u30c8\u306b\u767b\u9332\uff08\u30a2\u30bf\u30c3\u30c1<\/strong>\uff09\u3059\u308b\u3068\u3001\u30a4\u30d9\u30f3\u30c8\u304c\u767a\u751f\u3057\u305f\u3068\u304d\u306b\u81ea\u52d5\u3067eBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u547c\u3070\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
<\/span><\/p>\n
OpenTelemetry\u306e\u30bc\u30ed\u30b3\u30fc\u30c9\u8a08\u88c5\u3067\u306fGo\u8a00\u8a9e\u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u542b\u307e\u308c\u308bnet\/http\u3084\u3001database\/sql\u306e\u95a2\u6570\u547c\u3073\u51fa\u3057\u306beBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30a2\u30bf\u30c3\u30c1\u3057\u3001\u5b9f\u884c\u6642\u9593\u3084\u5f15\u6570\u3092\u30c8\u30ec\u30fc\u30b9\u3068\u3057\u3066\u9001\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
Go\u8a00\u8a9e\u3067eBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u304f<\/h2>\n
\u3053\u3053\u304b\u3089\u306f\u3001\u5b9f\u969b\u306bGo\u8a00\u8a9e\u3067\u3067\u304d\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u5bfe\u3057\u3066\u3001eBPF\u3092\u7528\u3044\u3066\u30bc\u30ed\u30b3\u30fc\u30c9\u8a08\u88c5\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u3053\u304b\u3089\u306e\u30b3\u30fc\u30c9\u306f\u4e0b\u8a18\u306e\u30ea\u30dd\u30b8\u30c8\u30ea\u306b\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n
https:\/\/github.com\/appare45\/go-auto-instrument-ebpf\/tree\/64b75cbea37932d9ea72d8ab1cf23d042be04dd0<\/a><\/p>\n
\u672c\u8a18\u4e8b\u306e\u57f7\u7b46\u6642\u70b9\uff082025\u5e7411\u6708\uff09\u3067eBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u3067\u304d\u308b\u8a00\u8a9e\u306f\u3001\u79c1\u306e\u77e5\u308b\u9650\u308aC\u8a00\u8a9e\u3068Rust\u8a00\u8a9e\u306e\u307f\u3067\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306fOpenTelemetry\u306e\u516c\u5f0f\u5b9f\u88c5\u3068\u540c\u3058\u304f\u8a08\u88c5\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u90e8\u5206\u3092Go\u8a00\u8a9e\u3067\u3001eBPF\u306e\u30b3\u30fc\u30c9\u306fC\u8a00\u8a9e\u3067\u66f8\u304f\u3053\u3068\u306b\u3057\u307e\u3059\u3002<\/p>\n
\u74b0\u5883\u69cb\u7bc9\u306e\u65b9\u6cd5\u306a\u3069\u306b\u3064\u3044\u3066\u306f\u300cAppendix: \u74b0\u5883\u69cb\u7bc9\u306b\u3064\u3044\u3066<\/a>\u300d\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u672c\u8a18\u4e8b\u4e2d\u306e\u30b3\u30fc\u30c9\u306fArm\u74b0\u5883\u3067\u306eUbuntu\u3067\u52d5\u4f5c\u78ba\u8a8d\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
C\u8a00\u8a9e\u3067\u66f8\u3044\u305feBPF\u306e\u30b3\u30fc\u30c9\u306f\u3001bpf2go<\/strong><\/a>\u3068\u3044\u3046\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\u3068\u3001Go\u8a00\u8a9e\u5411\u3051\u306e\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u751f\u6210\u3068eBPF\u30b3\u30fc\u30c9\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
<\/span><\/p>\n
\u4eca\u56de\u306feBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u3092tracer.c<\/code>\u306b\u66f8\u304f\u3053\u3068\u306b\u3057\u307e\u3059\u3002go generate<\/code><\/a>\u3092\u4f7f\u3063\u3066\u3001tracer.c<\/code>\u304b\u3089eBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u3078\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u3068\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u3092\u751f\u6210\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n
package<\/span> main\n\n\n<\/pre>\n
\u95a2\u6570\u306e\u5b9f\u884c\u958b\u59cb\u3068\u7d42\u4e86\u3092\u8a18\u9332\u3059\u308b<\/h2>\n
\u307e\u305a\u95a2\u6570\u306e\u958b\u59cb\u3068\u7d42\u4e86\u3092\u3001\u6b21\u306e\u3088\u3046\u306a\u6d41\u308c\u3067\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5916\u304b\u3089\u89b3\u6e2c\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n
    \n
  1. \u95a2\u6570\u306e\u958b\u59cb\u3068\u7d42\u4e86\u6642\u306beBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u547c\u3070\u308c\u308b\u3088\u3046\u306b\u3059\u308b<\/li>\n
  2. eBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u547c\u3070\u308c\u305f\u3089\u73fe\u5728\u6642\u523b\u3092BPF Map\u306b\u4fdd\u5b58\u3059\u308b<\/li>\n
  3. \u76e3\u8996\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306fBPF Map\u3092\u76e3\u8996\u3057\u3001\u30a4\u30d9\u30f3\u30c8\u304c\u8ffd\u52a0\u3055\u308c\u305f\u3089\u30bf\u30fc\u30df\u30ca\u30eb\u306b\u8868\u793a\u3059\u308b<\/li>\n<\/ol>\n
    <\/span><\/p>\n
    BPF Map<\/strong>\u306f\u3001eBPF\u304b\u3089\u3082\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30d7\u30ed\u30b0\u30e9\u30e0\u304b\u3089\u3082\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u9818\u57df\u3067\u3059\u3002BPF Map\u306b\u306f\u5faa\u74b0\u30ea\u30b9\u30c8\u3084\u30cf\u30c3\u30b7\u30e5\u30de\u30c3\u30d7\u306a\u3069\u3055\u307e\u3056\u307e\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u4eca\u56de\u306f\u30b7\u30f3\u30d7\u30eb\u306a\u30ea\u30b9\u30c8BPF_MAP_TYPE_PERF_EVENT_ARRAY<\/code>\u3092\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n
    tracer.c<\/code>\u306b\u6b21\u306e\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u3001\u5b9f\u969b\u306b\u8a66\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
    #include <\/span><\/span>\n#include <\/span><\/span>\n#include <\/span><\/span>\n#include <\/span><\/span>\n\nstruct<\/span> event {\n  __u64 pid;\n  __u64 tid;\n  __u64 timestamp;\n};\n\nstruct<\/span> {\n  __uint<\/span>(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY); \n  __type<\/span>(value, struct<\/span> event);\n} events SEC<\/span>(\".maps\"<\/span>);\n\n\nSEC<\/span>(\"uprobe\/start_event\"<\/span>)\nint<\/span> uprobe_start_event<\/span>(struct<\/span> pt_regs *ctx) {\n  struct<\/span> event event;\n  __u64 id = bpf_get_current_pid_tgid<\/span>();\n  event.pid = id >> 32<\/span>; \n  event.tid = (__u32)id; \n  event.start_time = bpf_ktime_get_ns<\/span>(); \n  bpf_perf_event_output<\/span>(ctx, &events, BPF_F_CURRENT_CPU, &event, sizeof<\/span>(event)); \n  return<\/span> 0<\/span>;\n}\n\n\nSEC<\/span>(\"uretprobe\/end_event\"<\/span>)\nint<\/span> uretprobe_end_event<\/span>(struct<\/span> pt_regs *ctx) {\n  struct<\/span> event event;\n  __u64 id = bpf_get_current_pid_tgid<\/span>();\n\n  event.pid = id >> 32<\/span>; \n  event.tid = (__u32)id; \n  event.end_time = bpf_ktime_get_ns<\/span>(); \n\n  bpf_perf_event_output<\/span>(ctx, &events, BPF_F_CURRENT_CPU, &event, sizeof<\/span>(event)); \n  return<\/span> 0<\/span>;\n}\n\nchar<\/span> LICENSE[] SEC<\/span>(\"license\"<\/span>) = \"GPL\"<\/span>; \n<\/pre>\n
    Go\u8a00\u8a9e\u5074\uff08\u8a08\u88c5\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\uff09\u3067\u306f\u3001\u4f5c\u6210\u3057\u305fBPF Map\u3092\u76e3\u8996\u3057\u3066\u3001\u30a4\u30d9\u30f3\u30c8\u304c\u8ffd\u52a0\u3055\u308c\u305f\u3089\u30bf\u30fc\u30df\u30ca\u30eb\u306b\u51fa\u529b\u3057\u307e\u3059\u3002<\/p>\n
    \nfunc<\/span> main() {\n  if<\/span> len<\/span>(os.Args) < 3<\/span> {\n    log.Fatalf(\"usage: %s  \"<\/symbol_name><\/binary_path><\/span>, os.Args[0<\/span>])\n    return<\/span>\n  }\n\n  binPath := os.Args[1<\/span>]\n\n  if<\/span> _, err := os.Stat(binPath); os.IsNotExist(err) {\n    log.Fatalf(\"binary path does not exist: %s\"<\/span>, binPath)\n    return<\/span>\n  }\n\n  symbol := os.Args[2<\/span>]\n  if<\/span> symbol == \"\"<\/span> {\n    log.Fatalf(\"symbol name is required\"<\/span>)\n    return<\/span>\n  }\n\n  if<\/span> err := rlimit.RemoveMemlock(); err != nil<\/span> {\n    log.Fatal(\"Removing memlock:\"<\/span>, err)\n  }\n\n  objs := tracerObjects{} \n  if<\/span> err := loadTracerObjects(&objs, nil<\/span>); err != nil<\/span> { \n    log.Fatalf(\"loading objects: %s\"<\/span>, err)\n  }\n  defer<\/span> objs.Close()\n\n  ex, err := link.OpenExecutable(binPath) \n  if<\/span> err != nil<\/span> {\n    log.Fatalf(\"opening executable: %s\"<\/span>, err)\n  }\n\n  up, err := ex.Uprobe(symbol, objs.UprobeStartEvent, nil<\/span>) \n  if<\/span> err != nil<\/span> {\n    log.Fatalf(\"creating uprobe: %s\"<\/span>, err)\n  }\n  defer<\/span> up.Close()\n\n  uretp, err := ex.Uretprobe(symbol, objs.UretprobeEndEvent, nil<\/span>) \n  if<\/span> err != nil<\/span> {\n    log.Fatalf(\"creating uretprobe: %s\"<\/span>, err)\n  }\n  defer<\/span> uretp.Close()\n\n  rd, err := perf.NewReader(objs.Events, os.Getpagesize()) \n  if<\/span> err != nil<\/span> {\n    log.Fatalf(\"creating perf event reader: %s\"<\/span>, err)\n  }\n  defer<\/span> rd.Close()\n\n  stopper := make<\/span>(chan<\/span> os.Signal, 1<\/span>)\n  signal.Notify(stopper, os.Interrupt, syscall.SIGTERM)\n\n  go<\/span> func<\/span>() {\n    <-stopper\n    log.Println(\"Received signal, exiting program..\"<\/span>)\n    if<\/span> err := rd.Close(); err != nil<\/span> {\n      log.Fatalf(\"closing perf event reader: %s\"<\/span>, err)\n    }\n  }()\n\n  log.Printf(\"Listening for events..\"<\/span>)\n  for<\/span> {\n    record, err := rd.Read()\n    if<\/span> err != nil<\/span> {\n      if<\/span> errors.Is(err, perf.ErrClosed) {\n        return<\/span>\n      }\n      log.Printf(\"reading from perf event reader: %s\"<\/span>, err)\n      continue<\/span>\n    }\n    if<\/span> record.LostSamples != 0<\/span> {\n      log.Printf(\"perf event ring buffer full, dropped %d samples\"<\/span>, record.LostSamples)\n      continue<\/span>\n    }\n    var<\/span> event tracerEvent\n    if<\/span> err := binary.Read(bytes.NewBuffer(record.RawSample), binary.LittleEndian, &event); err != nil<\/span> { \n      log.Printf(\"parsing perf event: %s\"<\/span>, err)\n      continue<\/span>\n    }\n    log.Printf(\"pid %d, tid %d, timestamp %d\"<\/span>, event.Pid, event.Tid, event.Timestamp)\n  }\n}\n<\/pre>\n
    \u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f7f\u3063\u3066\u5b9f\u969b\u306b\u95a2\u6570\u306e\u5b9f\u884c\u6642\u9593\u3092\u8a08\u6e2c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u8a08\u6e2c\u5bfe\u8c61\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u3053\u3061\u3089\u306b\u7528\u610f\u3057\u307e\u3057\u305f<\/a>\u3002<\/p>\n
    go generate && go build && sudo .\/auto-instrument-go-ebpf .\/example\/hello-world main.hello<\/code> \u306e\u3088\u3046\u306b\u5b9f\u884c\u3059\u308b\u3068\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u30d3\u30eb\u30c9\u3055\u308c\u3066\u3001\u5b9f\u969b\u306b\u95a2\u6570\u306e\u958b\u59cb\u3068\u7d42\u4e86\u306e\u30a4\u30d9\u30f3\u30c8\u304c\u30bf\u30fc\u30df\u30ca\u30eb\u306b\u51fa\u529b\u3055\u308c\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002Go\u8a00\u8a9e\u3067\u306f\u30d0\u30a4\u30ca\u30ea\u306b\u542b\u307e\u308c\u308b\u95a2\u6570\u306e\u30b7\u30f3\u30dc\u30eb\u540d\u306f\u3001<\u30d1\u30c3\u30b1\u30fc\u30b8\u540d>.<\u95a2\u6570\u540d><\/code> \u3068\u3044\u3046\u5f62\u5f0f\u306b\u306a\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
    $ sudo .\/otel-go-auto .\/examples\/hello-world\/hello-world main.hello\n2025\/11\/11 16:42:01 PID: 3644, Duration: 122207 ns<\/pre>\n
    uretprobe\u3092\u4f7f\u308f\u305a\u306b\u95a2\u6570\u306e\u7d42\u4e86\u3092\u77e5\u308b<\/h2>\n
    \u5148\u307b\u3069\u306e\u30b3\u30fc\u30c9\u3067\u306furetprobe<\/code>\u3092\u4f7f\u3063\u3066\u95a2\u6570\u306e\u7d42\u4e86\u6642\u306beBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3057\u307e\u3057\u305f\u3002\u3057\u304b\u3057Go\u8a00\u8a9e\u3067uretprobe<\/code>\u3092\u4f7f\u3046\u3068\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u305f\u3073\u305f\u3073\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001uretprobe<\/code>\u304c\u95a2\u6570\u306e\u30ea\u30bf\u30fc\u30f3\u30a2\u30c9\u30ec\u30b9\u3092\u4e0a\u66f8\u304d\u3057\u3066\u3057\u307e\u3044\u3001Go\u8a00\u8a9e\u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u306b\u3088\u3063\u3066\u30b9\u30bf\u30c3\u30af\u304c\u5909\u66f4\u3055\u308c\u308b\u3068\u3001\u6b63\u3057\u304f\u30ea\u30bf\u30fc\u30f3\u30a2\u30c9\u30ec\u30b9\u306b\u623b\u308c\u306a\u304f\u306a\u308b\u305f\u3081\u3067\u3059 *1<\/a> \u3002<\/p>\n
    \u305d\u3053\u3067\u672c\u7bc0\u3067\u306furetprobe<\/code>\u3092\u4f7f\u308f\u305a\u306b\u95a2\u6570\u306e\u7d42\u4e86\u3092\u77e5\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002uretprobe<\/code>\u3092\u4f7f\u308f\u305a\u306b\u95a2\u6570\u306e\u7d42\u4e86\u3092\u77e5\u308b\u305f\u3081\u306b\u306f\u3001\u30d0\u30a4\u30ca\u30ea\u3092\u89e3\u6790\u3057\u3066\u95a2\u6570\u306e\u7d42\u4e86\u4f4d\u7f6e\u3092\u9759\u7684\u306b\u7279\u5b9a\u3057\u3001uprobe<\/code><\/strong>\u3092\u4f7f\u3063\u3066\u95a2\u6570\u306e\u7d42\u4e86\u4f4d\u7f6e\u306beBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30a2\u30bf\u30c3\u30c1\u3057\u307e\u3059\u3002<\/p>\n
    \u524d\u7bc0\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001uprobe<\/code>\u306e\u8a2d\u5b9a\u306b\u30d0\u30a4\u30ca\u30ea\u306e\u30d1\u30b9\u3068\u30b7\u30f3\u30dc\u30eb\u540d\u3092func(*Executable) Uprobe<\/code><\/a>\u306b\u6e21\u3057\u3066\u3044\u307e\u3057\u305f\u3002Uprobe<\/code>\u306e\u5185\u90e8\u3067\u306f\u6e21\u3055\u308c\u305f\u30b7\u30f3\u30dc\u30eb\u306e\u3001\u4f4d\u7f6e\uff08\u30d5\u30a1\u30a4\u30eb\u30aa\u30d5\u30bb\u30c3\u30c8<\/strong>\uff09\u3092\u63a2\u3057\u3066\u30c8\u30ec\u30fc\u30b9\u30dd\u30a4\u30f3\u30c8\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059 *2<\/a> \u3002\u3064\u307e\u308a\u3001uprobe<\/code>\u306f\u95a2\u6570\u306e\u958b\u59cb\u4f4d\u7f6e\u306b\u9650\u3089\u305a\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4efb\u610f\u306e\u4f4d\u7f6e\u306beBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30a2\u30bf\u30c3\u30c1\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u7279\u6027\u3092\u4f7f\u3044\u3001\u95a2\u6570\u306e\u7d42\u4e86\u4f4d\u7f6e\u3092\u4e8b\u524d\u306b\u30d0\u30a4\u30ca\u30ea\u3092\u89e3\u6790\u3057\u3066\u7279\u5b9a\u3057\u3001uprobe<\/code>\u3092\u4f7f\u3063\u3066eBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u5b9f\u884c\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n
    \u95a2\u6570\u306e\u7d42\u4e86\u4f4d\u7f6e\u3092\u7279\u5b9a\u3059\u308b\u524d\u306b\u3001\u95a2\u6570\u306e\u958b\u59cb\u4f4d\u7f6e\u3092\u8abf\u3079\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002Go\u8a00\u8a9e\u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30eadebug\/elf<\/code><\/a>\u3092\u4f7f\u3063\u3066\u30d0\u30a4\u30ca\u30ea\u3092\u89e3\u6790\u3057\u307e\u3059\u3002<\/p>\n
    \u624b\u9806\u3068\u3057\u3066\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n
      \n
    1. ELF\u30d0\u30a4\u30ca\u30ea\u306e\u30b7\u30f3\u30dc\u30eb\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u95a2\u6570\u306e\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u3068\u30b5\u30a4\u30ba\u3092\u53d6\u5f97\u3059\u308b<\/li>\n
    2. \u30d7\u30ed\u30b0\u30e9\u30e0\u30d8\u30c3\u30c0\u304b\u3089\u95a2\u6570\u304c\u5c5e\u3059\u308b\u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u63a2\u3057\u51fa\u3057\u3001\u30d5\u30a1\u30a4\u30eb\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u7279\u5b9a\u3059\u308b\uff08\u8a73\u3057\u304f\u306f\u6b21\u306e\u56f3\u3092\u53c2\u7167\uff09<\/li>\n<\/ol>\n
      <\/span><\/p>\n
      \u307e\u305a\u3001ELF\u30d0\u30a4\u30ca\u30ea\u306e\u30b7\u30f3\u30dc\u30eb\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u8a08\u88c5\u3057\u305f\u3044\u95a2\u6570\u306e\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u3068\u30b5\u30a4\u30ba\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n
      symbol := \"main.hello\"<\/span>\nvar<\/span> va int<\/span>\nvar<\/span> size int<\/span>\n\nfor<\/span> _, sym := range<\/span> symbols {\n  if<\/span> elf.ST_TYPE(sym.Info) != elf.STT_FUNC { \n    continue<\/span>\n  }\n  if<\/span> (sym.Name == symbol) { \n    va = sym.Value\n    size = sym.Size\n    break<\/span>\n  }\n}\n<\/pre>\n
      \u6b21\u306b\u5148\u307b\u3069\u8abf\u3079\u305f\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u3092\u3082\u3068\u306b\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u30d8\u30c3\u30c0\u304b\u3089\u95a2\u6570\u304c\u5c5e\u3059\u308b\u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u63a2\u3057\u51fa\u3057\u307e\u3059\u3002\u898b\u3064\u304b\u3063\u305f\u30bb\u30b0\u30e1\u30f3\u30c8\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u306b\u30b7\u30f3\u30dc\u30eb\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\uff08\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306e\u5dee\u304b\u3089\u8a08\u7b97\uff09\u3092\u52a0\u3048\u308b\u3053\u3068\u3067\u3001\u30d5\u30a1\u30a4\u30eb\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u7279\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
      var<\/span> offset int<\/span>\nfor<\/span> _, ph := range<\/span> elfFile.Progs {\n    if<\/span> ph.Type != elf.PT_LOAD || (ph.Flags&elf.PF_X) == 0<\/span> { \n      continue<\/span>\n    }\n    if<\/span> (ph.Vaddr <= uint64<\/span>(va) && uint64<\/span>(va) < ph.Vaddr + ph.Memsz) { \n      offset = int<\/span>(ph.Off + (uint64<\/span>(va) - ph.Vaddr)) \n      break<\/span>\n    }\n  }\n<\/pre>\n
      \u3053\u3053\u307e\u3067\u3067\u95a2\u6570\u306e\u958b\u59cb\u4f4d\u7f6e\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002\u6b21\u306b\u95a2\u6570\u306e\u7d42\u4e86\u4f4d\u7f6e\u3092\u7279\u5b9a\u3057\u307e\u3059\u3002\u95a2\u6570\u306e\u7d42\u4e86\u4f4d\u7f6e\u306f\u3001\u95a2\u6570\u306e\u30d0\u30a4\u30ca\u30ea\u3092\u30c7\u30a3\u30b9\u30a2\u30bb\u30f3\u30d6\u30eb\u3057\u3001RET<\/code>\u547d\u4ee4\u306e\u4f4d\u7f6e\u3092\u63a2\u3059\u3053\u3068\u3067\u7279\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
      \u307e\u305a\u3001\u95a2\u6570\u306b\u5bfe\u5fdc\u3059\u308b\u30d0\u30a4\u30ca\u30ea\u3092\u63a2\u3057\u51fa\u3057\u307e\u3059\u3002\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30d0\u30a4\u30ca\u30ea\u306fELF\u30d5\u30a1\u30a4\u30eb\u306e.text<\/code>\u30bb\u30af\u30b7\u30e7\u30f3\u306b\u542b\u307e\u308c\u3066\u3044\u308b\u306e\u3067\u3001.text<\/code>\u30bb\u30af\u30b7\u30e7\u30f3\u306e\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u3068\u95a2\u6570\u306e\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u3068\u30b5\u30a4\u30ba\u304b\u3089\u3001\u95a2\u6570\u306b\u5bfe\u5fdc\u3059\u308b\u30d0\u30a4\u30ca\u30ea\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002<\/p>\n
      buf := make<\/span>([]byte<\/span>, size)\nreadbytes, err := e.TextSection.ReadAt(buf, int64<\/span>(va-e.TextSection.Addr))\nreadBuf := buf[:readbytes]\n<\/pre>\n
      \u62bd\u51fa\u3057\u305f\u30d0\u30a4\u30ca\u30ea\u3092\u30c7\u30a3\u30b9\u30a2\u30bb\u30f3\u30d6\u30eb\u3057\u3001RET<\/code>\u547d\u4ee4\u306e\u4f4d\u7f6e\u3092\u5217\u6319\u3057\u307e\u3059\u3002<\/p>\n
      retOffsets := make<\/span>([]uint64<\/span>, 0<\/span>)\nconst<\/span> arm64RetInstructionSize = 4<\/span>\nfor<\/span> i := 0<\/span>; i < len<\/span>(readBuf); i += arm64RetInstructionSize {\n  instruction, err := arm64asm.Decode(readBuf[i:])\n  if<\/span> err != nil<\/span> {\n    continue<\/span>\n  }\n  if<\/span> instruction.Op == arm64asm.RET {\n    retOffsets = append<\/span>(retOffsets, offset+uint64<\/span>(i))\n  }\n}\n<\/pre>\n
      \u3053\u308c\u3067\u95a2\u6570\u306e\u7d42\u4e86\u4f4d\u7f6e\u3092\u3059\u3079\u3066\u7279\u5b9a\u3067\u304d\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u5024\u3092\u3082\u3068\u306buprobe<\/code>\u3092\u4f7f\u3063\u3066\u95a2\u6570\u306e\u958b\u59cb\u30fb\u7d42\u4e86\u306b\u30a2\u30bf\u30c3\u30c1\u3057\u307e\u3059\u3002<\/p>\n
      up, err := ex.Uprobe(\"\"<\/span>, start, &link.UprobeOptions{Address: startAddr}) \nif<\/span> err != nil<\/span> {\n  return<\/span> nil<\/span>, err\n}\n\nfor<\/span> _, retOffset := range<\/span> endAddrs {\n  uretp, err := ex.Uprobe(\"\"<\/span>, end, &link.UprobeOptions{Address: retOffset}) \n  if<\/span> err != nil<\/span> {\n    return<\/span> nil<\/span>, err\n  }\n}\n<\/pre>\n
      \u3053\u308c\u3067\u3001uretprobe\u3092\u4f7f\u308f\u305a\u306b\u95a2\u6570\u306e\u7d42\u4e86\u306beBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30a2\u30bf\u30c3\u30c1\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
      Goroutine\u3092\u8ffd\u3046<\/h2>\n
      Go\u8a00\u8a9e\u306e\u975e\u540c\u671f\u51e6\u7406\u3067\u306f\u3001Goroutine<\/strong><\/a>\u3068\u3044\u3046\u8a00\u8a9e\u72ec\u81ea\u306e\u4ed5\u7d44\u307f\u304c\u4f7f\u308f\u308c\u307e\u3059\u3002Goroutine\u3067\u306f\u975e\u540c\u671f\u3067\u5b9f\u884c\u3057\u305f\u3044\u51e6\u7406\u304c\u8a00\u8a9e\u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u306b\u3088\u308aOS\u306e\u30b9\u30ec\u30c3\u30c9\u306b\u30b9\u30b1\u30b8\u30e5\u30fc\u30ea\u30f3\u30b0\u3055\u308c\u307e\u3059*3<\/a>\u3002\u305d\u306e\u305f\u3081\u3001\u30b9\u30ec\u30c3\u30c9ID\u3092\u4f7f\u3063\u3066eBPF\u304b\u3089\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u305fGoroutine\u3092\u7279\u5b9a\u3067\u304d\u307e\u305b\u3093\u3002\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u305fGoroutine\u304c\u308f\u304b\u3089\u306a\u3044\u3068\u3001\u95a2\u6570\u306e\u5b9f\u884c\u958b\u59cb\u3068\u5b9f\u884c\u7d42\u4e86\u3092\u7d10\u3065\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u6b63\u3057\u3044\u30c8\u30ec\u30fc\u30b9\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n
      <\/span><\/p>\n
      \u5b9f\u969b\u306b\u95a2\u6570\u306e\u958b\u59cb\u6642\u3068\u7d42\u4e86\u6642\u306b\u30b9\u30ec\u30c3\u30c9ID\u3092\u51fa\u529b\u3059\u308b\u30b3\u30fc\u30c9<\/a>\u3092\u7528\u610f\u3057\u307e\u3057\u305f\u3002\u5b9f\u884c\u3057\u3066\u307f\u308b\u3068TID1\u3068TID2\u306b\u8868\u793a\u3055\u308c\u308b\u958b\u59cb\u6642\u30fb\u7d42\u4e86\u6642\u306e\u30b9\u30ec\u30c3\u30c9\u306eID\u304c\u3001\u540c\u3058\u95a2\u6570\u3067\u3082\u7570\u306a\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n
      2009\/11\/10 23:00:00 Goroutine 0 - PID: 10, TID1: 12, TID2: 12\n2009\/11\/10 23:00:00 Goroutine 1 - PID: 10, TID1: 14, TID2: 10\n2009\/11\/10 23:00:00 Goroutine 2 - PID: 10, TID1: 10, TID2: 14<\/pre>\n
      \u305d\u3053\u3067\u3001OpenTelemetry\u306e\u30bc\u30ed\u30b3\u30fc\u30c9\u8a08\u88c5\u3067\u306f\u30ec\u30b8\u30b9\u30bf<\/strong>\u3092\u4f7f\u3063\u3066\u3001\u547c\u3073\u51fa\u3057\u305fGoroutine\u3092\u7279\u5b9a\u3057\u307e\u3059\u3002Goroutine\u69cb\u9020\u4f53\uff08g<\/code>\uff09<\/a>\u306e\u30a2\u30c9\u30ec\u30b9\u306fGo\u8a00\u8a9e\u306eABI<\/a>\u306b\u57fa\u3065\u304d\u3001Arm64\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u5834\u5408\u306fR28\u30ec\u30b8\u30b9\u30bf\u306b\u7f6e\u304b\u308c\u307e\u3059 *4<\/a>\u3002<\/p>\n
      R28\u30ec\u30b8\u30b9\u30bf\u306fArm64\u7279\u6709\u306e\u30ec\u30b8\u30b9\u30bf\u306a\u306e\u3067\u3001ctx<\/code>\u3092__PT_REGS_CAST<\/code>\u3092\u7528\u3044\u3066\u5909\u63db\u3057\u53d6\u5f97\u3057\u307e\u3059\u3002\u6b21\u306e\u3088\u3046\u306a\u30de\u30af\u30ed *5<\/a>\u3067\u3001GoroutineID<\/strong>\u3092eBPF\u304b\u3089\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n
      #define <\/span>goroutine_id<\/span>(ctx) (<\/span>__PT_REGS_CAST<\/span>(ctx)->regs[<\/span>28<\/span>])<\/span>\n<\/pre>\n
      BPF Map\u306e\u30cf\u30c3\u30b7\u30e5\u30de\u30c3\u30d7\u3092\u7528\u3044\u3066\u3001GoroutineID\u3092\u30ad\u30fc\u3068\u3057\u3066\u30a4\u30d9\u30f3\u30c8\u3092\u4fdd\u5b58\u3059\u308b\u3053\u3068\u3067\u3001\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u3068\u7d42\u4e86\u3092\u7d10\u3065\u3051\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u76e3\u8996\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u7d42\u4e86\u6e08\u307f\u306e\u95a2\u6570\u3060\u3051\u3092\u53c2\u7167\u3067\u304d\u308b\u3088\u3046\u3001\u95a2\u6570\u304c\u7d42\u4e86\u3057\u305f\u3089\u914d\u5217\u306bevent\u3092\u8ffd\u52a0\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n
      #define <\/span>goroutine_id<\/span>(ctx) (<\/span>__PT_REGS_CAST<\/span>(ctx)->regs[<\/span>28<\/span>]) <\/span>\n\nstruct<\/span> event {\n  __u64 start_time;\n  __u64 end_time;\n};\n\nstruct<\/span> {\n  __uint<\/span>(type, BPF_MAP_TYPE_HASH); \n  __type<\/span>(key, __u64);\n  __type<\/span>(value, struct<\/span> event);\n  __uint<\/span>(max_entries, 1024<\/span>);\n} traces SEC<\/span>(\".maps\"<\/span>);\n\nstruct<\/span> {\n  __uint<\/span>(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY); \n} events SEC<\/span>(\".maps\"<\/span>);\n\nSEC<\/span>(\"uprobe\/start_trace\"<\/span>)\nint<\/span> uprobe_start_trace<\/span>(struct<\/span> pt_regs *ctx) {\n  struct<\/span> event event = {0<\/span>};\n  __u64 key = goroutine_id<\/span>(ctx); \n\n  event.start_time = bpf_ktime_get_ns<\/span>();\n\n  if<\/span> (bpf_map_update_elem<\/span>(&traces, &key, &event, BPF_ANY) < 0<\/span>) { \n    bpf_printk<\/span>(\"bpf_map_update_elem failed<\/span>\\n<\/span>\"<\/span>);\n  }\n  return<\/span> 0<\/span>;\n}\n\nSEC<\/span>(\"uprobe\/end_trace\"<\/span>)\nint<\/span> uprobe_end_trace<\/span>(struct<\/span> pt_regs *ctx) {\n  struct<\/span> event *event;\n\n  __u64 key = goroutine_id<\/span>(ctx);\n  event = bpf_map_lookup_elem<\/span>(&traces, &key); \n  if<\/span> (event == NULL<\/span>) {\n    return<\/span> 0<\/span>;\n  }\n\n  event->end_time = bpf_ktime_get_ns<\/span>(); \n  bpf_perf_event_output<\/span>(ctx, &events, BPF_F_CURRENT_CPU, event, sizeof<\/span>(*event));\n\n  return<\/span> 0<\/span>;\n}\n<\/pre>\n
      \u3053\u308c\u3067\u3001Goroutine\u5185\u306e\u5b9f\u884c\u3067\u3082\u95a2\u6570\u306e\u958b\u59cb\u3068\u7d42\u4e86\u3092\u6b63\u3057\u304f\u89b3\u6e2c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
      Mackerel\u3078\u30c8\u30ec\u30fc\u30b9\u3092\u6295\u7a3f\u3059\u308b<\/h2>\n
      OpenTelemetry\u3067\u306f\u30c8\u30ec\u30fc\u30b9\u306e\u958b\u59cb\u6642\u523b\u3068\u7d42\u4e86\u6642\u523b\u306fUNIX\u6642\u9593<\/strong>\u3067\u5b9a\u7fa9\u3055\u308c\u307e\u3059*6<\/a> \u3002\u3053\u308c\u306b\u5bfe\u3057\u3001eBPF\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u6642\u523b\u3092\u4fdd\u5b58\u3059\u308b\u305f\u3081\u306b\u547c\u3093\u3067\u3044\u308bbpf_ktime_get_ns()<\/code>\u306f\u30b7\u30b9\u30c6\u30e0\u306e\u8d77\u52d5\u304b\u3089\u306e\u7d4c\u904e\u6642\u9593CLOCK_MONOTONIC<\/code>\u3092\u8fd4\u3059\u305f\u3081*7<\/a>\u3001\u305d\u306e\u307e\u307e\u4f7f\u3046\u3053\u3068\u306f\u3067\u304d\u305a\u3001UNIX\u6642\u9593\u306b\u5909\u63db\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u672c\u7bc0\u3067\u306f\u8a08\u88c5\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067UNIX\u6642\u9593\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n
      Go\u8a00\u8a9e\u3067\u306feBPF\u3067\u53d6\u5f97\u3057\u3066\u3044\u308b\u5024\u3092unix.ClockGettime(unix.CLOCK_MONOTONIC, &now)<\/code>\u3067\u53d6\u5f97\u3067\u304d\u308b\u306e\u3067\u3001\u3053\u308c\u3092\u4f7f\u3063\u3066\u5909\u63db\u3057\u307e\u3059<\/a>\u3002<\/p>\n
      func<\/span> GetRealTimestamp(timeNanosec int64<\/span>) (time.Time, error<\/span>) {\n  var<\/span> now unix.Timespec\n  if<\/span> err := unix.ClockGettime(unix.CLOCK_MONOTONIC, &now); err != nil<\/span> {\n    return<\/span> time.Time{}, err\n  }\n  offset := time.Nanosecond * time.Duration(now.Nano()-timeNanosec)\n  return<\/span> time.Now().Add(-1<\/span> * offset), nil<\/span>\n}\n<\/pre>\n
      \u3053\u3053\u307e\u3067\u3067Mackerel\u306b\u30c8\u30ec\u30fc\u30b9\u3092\u6295\u7a3f\u3059\u308b\u6e96\u5099\u304c\u6574\u3044\u307e\u3057\u305f\u3002\u5b9f\u969b\u306b\u30c8\u30ec\u30fc\u30b9\u3092\u6295\u7a3f\u3057\u3066\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002Go\u8a00\u8a9e\u3067OpenTelemetry\u3092\u4f7f\u3063\u3066\u3001Mackerel\u306b\u30c8\u30ec\u30fc\u30b9\u3092\u6295\u7a3f\u3059\u308b\u65b9\u6cd5\u306f\u30d8\u30eb\u30d7\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u3067\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
      \u3053\u306e\u89e3\u8aac\u306b\u5f93\u3063\u3066TraceProvider\u3092\u4f5c\u6210\u3057\u305f\u3089\u3001\u6b21\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3067\u30c8\u30ec\u30fc\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u30c8\u30ec\u30fc\u30b9\u306e\u958b\u59cb\u6642\u523b\u3068\u7d42\u4e86\u6642\u523b\u306f\u3001\u5148\u307b\u3069\u5909\u63db\u3057\u305fUNIX\u6642\u9593\u3067\u5f15\u6570\u306b\u6e21\u3057\u3066\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
      _, span := tracer.Start(context.TODO(), \"function call\"<\/span>,\n  trace.WithTimestamp(starttime),\n)\nspan.End(trace.WithTimestamp(endTime))\n<\/pre>\n
      <\/span><\/p>\n
      \u5b9f\u969b\u306b\u30c8\u30ec\u30fc\u30b9\u304cMackerel\u306b\u6295\u7a3f\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n
      \u5f15\u6570\u306e\u5024\u3092\u53d6\u5f97\u3059\u308b<\/h2>\n
      \u524d\u7bc0\u307e\u3067\u3067\u95a2\u6570\u306e\u5b9f\u884c\u6642\u9593\u3092Mackerel\u306b\u6295\u7a3f\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u672c\u7bc0\u3067\u306f\u3001Mackerel\u306eAPM\u3092\u6d3b\u7528\u3059\u308b\u305f\u3081\u306b\u3001eBPF\u3067\u547c\u3073\u51fa\u3055\u308c\u305f\u95a2\u6570\u306e\u5f15\u6570\u306e\u5024\u3092\u30ec\u30b8\u30b9\u30bf\u3084\u30e1\u30e2\u30ea\u304b\u3089\u53d6\u5f97\u3057\u3066\u30c8\u30ec\u30fc\u30b9\u306b\u542b\u3081\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n
      \u4eca\u56de\u306fHTTP\u30b5\u30fc\u30d0\u30fc\u306e\u5206\u6790\u6a5f\u80fd\u3092\u6d3b\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002\u30d8\u30eb\u30d7\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u306b\u8a18\u8f09\u304c\u3042\u308a\u307e\u3059\u304c\u3001Mackerel\u306eAPM\u3067HTTP\u30b5\u30fc\u30d0\u30fc\u3092\u5206\u6790\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u6b21\u306e\u5c5e\u6027\u3092\u6301\u3063\u305f\u30c8\u30ec\u30fc\u30b9\u3092\u9001\u4fe1\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n