trace.cpuLogRead[1].close()
	trace.cpuSleep.wake()

	// Wait until the logger goroutine exits.
	<-trace.cpuLogDone

	// Clear state for the next trace.
	trace.cpuLogDone = nil
	trace.cpuLogRead[0] = nil
	trace.cpuLogRead[1] = nil
	trace.cpuSleep.close()
}

// traceReadCPU attempts to read from the provided profBuf[gen%2] and write
// into the trace. Returns true if there might be more to read or false

package main

import (
	"internal/trace"
	"internal/trace/event/go122"
	testgen "internal/trace/internal/testgen/go122"
)

func main() {
	testgen.Main(gen)
}

func gen(t *testgen.Trace) {
	g := t.Generation(1)

	// One goroutine is exiting with a syscall. It already
	// acquired a new P.
	b0 := g.Batch(trace.ThreadID(0), 0)
	b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoSyscall)

	b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoRunning)
	b0.Event("GoSyscallBegin", testgen.Seq(1), testgen.NoStack)
	b0.Event("GoSyscallEnd")
	b0.Event("GoSyscallBegin", testgen.Seq(2), testgen.NoStack)
	b0.Event("GoSyscallEndBlocked")

	// A running goroutine steals proc 0.
	b1 := g.Batch(trace.ThreadID(1), 0)
	b1.Event("ProcStatus", trace.ProcID(2), go122.ProcRunning)

import (
	"bytes"
	"fmt"
	"internal/trace/raw"
	"internal/trace/version"
	"io"
	"log"
	"os"
	"os/exec"
)

func main() {
	// Create command.
	var trace, stderr bytes.Buffer
	cmd := exec.Command("go", "run", "./testprog/main.go")
	cmd.Stdout = &trace
	cmd.Stderr = &stderr

	// Run trace program; the trace will appear in stdout.
	fmt.Fprintln(os.Stderr, "running trace program...")
	if err := cmd.Run(); err != nil {

package main

import (
	"internal/trace"
	"internal/trace/event/go122"
	testgen "internal/trace/internal/testgen/go122"
)

func main() {
	testgen.Main(gen)
}

func gen(t *testgen.Trace) {
	g := t.Generation(1)

	// A C thread calls into Go and acquires a P. It returns
	// back to C, destroying the G.
	b0 := g.Batch(trace.ThreadID(0), 0)
	b0.Event("GoCreateSyscall", trace.GoID(4))
	b0.Event("GoSyscallEndBlocked")

	}

	// Beginning of traced execution.
	var wg sync.WaitGroup
	ctx, task := trace.NewTask(bgctx, "task0") // EvUserTaskCreate("task0")
	trace.StartRegion(ctx, "task0 region")

	wg.Add(1)
	go func() {
		defer wg.Done()
		defer task.End() // EvUserTaskEnd("task0")

		trace.StartRegion(ctx, "unended region")

		trace.WithRegion(ctx, "region0", func() {
			// EvUserRegionBegin("region0", start)

    }

    public boolean isTraceEnabled() {
        return false;
    }

    public void trace(String msg) {}

    public void trace(String format, Object arg) {}

    public void trace(String format, Object arg1, Object arg2) {}

    public void trace(String format, Object... arguments) {}

    public void trace(String msg, Throwable t) {}

    public boolean isTraceEnabled(Marker marker) {
        return false;

		}
		// Pass the trace through MutatorUtilizationV2 and check it.
		check(t, trace.MutatorUtilizationV2(events, trace.UtilSTW|trace.UtilBackground|trace.UtilAssist))
	})
}

func mmuSlow(util []trace.MutatorUtil, window time.Duration) (mmu float64) {
	if max := time.Duration(util[len(util)-1].Time - util[0].Time); window > max {
		window = max
	}

	mmu = 1.0

    def exception = new Exception()
    def trace = exception.stackTrace as List

    def "returns a new trace rather than mutating the original one"() {
        spec.isSatisfiedBy(_) >> true

        when:
        def filtered = filter.filter(trace)

        then:
        !filtered.is(trace)
        trace == old(trace)
    }

    def "filters stack trace according to the provided spec"() {

		print("runtime: goid=", goid, "\n")
		throw("attempted to trace a bad status for a goroutine")
	}

	// Trace the status.
	if stackID == 0 {
		w = w.event(traceEvGoStatus, traceArg(goid), traceArg(uint64(mid)), traceArg(status))
	} else {
		w = w.event(traceEvGoStatusStack, traceArg(goid), traceArg(uint64(mid)), traceArg(status), traceArg(stackID))
	}

	// Trace any special ranges that are in-progress.
	if markAssist {