defer cond.L.Unlock()

			// If multiple goroutines are waiting on cond simultaneously,
			// we need to make sure we wake up exactly this one.
			// That means that we need to Broadcast to all of the goroutines,
			// which will wake them all up.
			//
			// If there are N concurrent calls to waitOnCond, each of the goroutines
			// will spuriously wake up O(N) other goroutines that aren't ready yet,

	mode      traceviewer.Mode
	startTime time.Duration
	endTime   time.Duration

	// Used if mode != 0.
	focusGoroutine trace.GoID
	goroutines     map[trace.GoID]struct{} // Goroutines to be displayed for goroutine-oriented or task-oriented view. goroutines[0] is the main goroutine.
	tasks          []*trace.UserTaskSummary
}

// setTask sets a task to focus on.

	"freezes the world", preempting all threads to stop all running
	goroutines, which makes it possible to traceback all goroutines, and
	keeps their state close to the point of panic. Setting
	dontfreezetheworld=1 disables this preemption, allowing goroutines to
	continue executing during panic processing. Note that goroutines that
	naturally enter the scheduler will still stop. This can be useful when

class GoroutineCmd(gdb.Command):
	"""Execute gdb command in the context of goroutine <goid>.

	Switch PC and SP to the ones in the goroutine's G structure,
	execute an arbitrary gdb command, and restore PC and SP.

	Usage: (gdb) goroutine <goid> <gdbcmd>

	You could pass "all" as <goid> to apply <gdbcmd> to all goroutines.

	For example: (gdb) goroutine all <gdbcmd>

				}
			}
		}

		// Check goroutines.
		if len(want.goroutines) != len(summary.Goroutines) {
			t.Errorf("wanted %d goroutines for task %d, got %d goroutines instead", len(want.goroutines), id, len(summary.Goroutines))
		} else {
			for _, goid := range want.goroutines {
				g, ok := summary.Goroutines[goid]
				if !ok {
					t.Errorf("want goroutine %d for task %d, not found", goid, id)
					continue
				}

		}
	}()
	return true
}

// SetLimit limits the number of active goroutines in this group to at most n.
// A negative value indicates no limit.
//
// Any subsequent call to the Go method will block until it can add an active
// goroutine without exceeding the configured limit.
//
// The limit must not be modified while any goroutines in the group are active.
func (g *Group) SetLimit(n int) {
	if n < 0 {

	}
}

// Unlock unlocks m.
// It is a run-time error if m is not locked on entry to Unlock.
//
// A locked [Mutex] is not associated with a particular goroutine.
// It is allowed for one goroutine to lock a Mutex and then
// arrange for another goroutine to unlock it.
func (m *Mutex) Unlock() {
	if race.Enabled {
		_ = m.state
		race.Release(unsafe.Pointer(m))
	}

	// Fast path: drop lock bit.

type GoRoutineCounter interface {
	// Add adds the given delta to the count of active goroutines.
	// Call Add(1) before forking a goroutine, Add(-1) at the end of that goroutine.
	// Call Add(-1) just before waiting on something from another goroutine (e.g.,
	// just before a `select`).
	// Call Add(1) just before doing something that unblocks a goroutine that is
	// waiting on that something.
	Add(delta int)

// Tests a many interesting cases (network, syscalls, a little GC, busy goroutines,
// blocked goroutines, LockOSThread, pipes, and GOMAXPROCS).

//go:build ignore

package main

import (
	"log"
	"net"
	"os"
	"runtime"
	"runtime/trace"
	"sync"
	"time"
)

func main() {
	var wg sync.WaitGroup
	done := make(chan bool)

	// Create a goroutine blocked before tracing.
	wg.Add(1)
	go func() {
		<-done

// Fatal from a test goroutine.
//
// # Analyzer testinggoroutine
//
// testinggoroutine: report calls to (*testing.T).Fatal from goroutines started by a test
//
// Functions that abruptly terminate a test, such as the Fatal, Fatalf, FailNow, and
// Skip{,f,Now} methods of *testing.T, must be called from the test goroutine itself.