codekingpro/portable-devtools

1// Copyright 2025 The Go Authors. All rights reserved.2// Use of this source code is governed by a BSD-style3// license that can be found in the LICENSE file.4 5package main6 7import (8	"bytes"9	"net/http"10	"os"11	"runtime/trace"12	"strings"13	"testing"14	"testing/synctest"15	"time"16 17	"internal/trace/testtrace"18)19 20// Regression test for go.dev/issue/74850.21func TestSyscallProfile74850(t *testing.T) {22	testtrace.MustHaveSyscallEvents(t)23 24	var buf bytes.Buffer25	err := trace.Start(&buf)26	if err != nil {27		t.Fatalf("start tracing: %v", err)28	}29 30	synctest.Test(t, func(t *testing.T) {31		go hidden1(t)32		go hidden2(t)33		go visible(t)34		synctest.Wait()35		time.Sleep(1 * time.Millisecond)36		synctest.Wait()37	})38	trace.Stop()39 40	if t.Failed() {41		return42	}43 44	parsed, err := parseTrace(&buf, int64(buf.Len()))45	if err != nil {46		t.Fatalf("parsing trace: %v", err)47	}48 49	records, err := pprofByGoroutine(computePprofSyscall(), parsed)(&http.Request{})50	if err != nil {51		t.Fatalf("failed to generate pprof: %v\n", err)52	}53 54	for _, r := range records {55		t.Logf("Record: n=%d, total=%v", r.Count, r.Time)56		for _, f := range r.Stack {57			t.Logf("\t%s", f.Func)58			t.Logf("\t\t%s:%d @ 0x%x", f.File, f.Line, f.PC)59		}60	}61	if len(records) == 0 {62		t.Error("empty profile")63	}64 65	// Make sure we see the right frames.66	wantSymbols := []string{"cmd/trace.visible", "cmd/trace.hidden1", "cmd/trace.hidden2"}67	haveSymbols := make([]bool, len(wantSymbols))68	for _, r := range records {69		for _, f := range r.Stack {70			for i, s := range wantSymbols {71				if strings.Contains(f.Func, s) {72					haveSymbols[i] = true73				}74			}75		}76	}77	for i, have := range haveSymbols {78		if !have {79			t.Errorf("expected %s in syscall profile", wantSymbols[i])80		}81	}82}83 84func stat(t *testing.T) {85	_, err := os.Stat(".")86	if err != nil {87		t.Errorf("os.Stat: %v", err)88	}89}90 91func hidden1(t *testing.T) {92	stat(t)93}94 95func hidden2(t *testing.T) {96	stat(t)97	stat(t)98}99 100func visible(t *testing.T) {101	stat(t)102	time.Sleep(1 * time.Millisecond)103}104