// Issue #29034: At least 2 frames are required to verify all frames are captured
// since runtime/pprof ignores the runtime.goexit base frame if it exists.
void pprofCgoTraceback(void* parg) {
	struct cgoTracebackArg* arg = (struct cgoTracebackArg*)(parg);
	arg->buf[0] = (uintptr_t)(cpuHog) + 0x10;
	arg->buf[1] = (uintptr_t)(cpuHog2) + 0x4;
	arg->buf[2] = 0;
}
*/
import "C"

	}
	done <- err
}

func cpu10(wg *sync.WaitGroup) {
	defer wg.Done()
	cpuHog(10 * time.Millisecond)
}

func cpu20(wg *sync.WaitGroup) {
	defer wg.Done()
	cpuHog(20 * time.Millisecond)
}

func cpuHog(dt time.Duration) {
	start := time.Now()
	for i := 0; ; i++ {
		if i%1000 == 0 && time.Since(start) > dt {
			return
		}
	}
}

	uintptr_t  sigContext;
	uintptr_t* buf;
	uintptr_t  max;
};

// pprofCgoThreadTraceback is passed to runtime.SetCgoTraceback.
// For testing purposes it pretends that all CPU hits on the cpuHog
// C thread are in cpuHog.
void pprofCgoThreadTraceback(void* parg) {
	struct cgoTracebackArg* arg = (struct cgoTracebackArg*)(parg);
	if (pthread_self() == tid) {
		arg->buf[0] = (uintptr_t)(cpuHogThread) + 0x10;

		}
	}
}

func TestCgoPprof(t *testing.T) {
	testCgoPprof(t, "", "CgoPprof", "cpuHog", "runtime.main")
}

func TestCgoPprofPIE(t *testing.T) {
	testCgoPprof(t, "-buildmode=pie", "CgoPprof", "cpuHog", "runtime.main")
}

func TestCgoPprofThread(t *testing.T) {
	testCgoPprof(t, "", "CgoPprofThread", "cpuHogThread", "cpuHogThread2")
}

// The actual CPU hogging function.
// Must not call other functions nor access heap/globals in the loop,
// otherwise under race detector the samples will be in the race runtime.
func cpuHog1(x int) int {
	return cpuHog0(x, 1e5)
}

func cpuHog0(x, n int) int {
	foo := x
	for i := 0; i < n; i++ {
		if i%1000 == 0 {
			// Spend time in mcall, stored as gp.m.curg, with g0 running
			runtime.Gosched()
		}

// otherwise under race detector the samples will be in the race runtime.
func cpuHog1(x int) int {
	return cpuHog0(x, 1e5)
}

func cpuHog0(x, n int) int {
	foo := x
	for i := 0; i < n; i++ {
		if foo > 0 {
			foo *= foo
		} else {
			foo *= foo + 1
		}
	}
	return foo
}

func cpuHog2(x int) int {
	foo := x
	for i := 0; i < 1e5; i++ {
		if foo > 0 {
			foo *= foo
		} else {

String id=68
	data="runtime.asyncPreempt"
String id=69
	data="/usr/local/google/home/mknyszek/work/go-1/src/runtime/preempt_amd64.s"
String id=70
	data="main.cpuHog"
String id=71
	data="main.main.func1"
String id=72
	data="runtime.gcMarkDone"
String id=73
	data="/usr/local/google/home/mknyszek/work/go-1/src/runtime/mgc.go"
String id=74

			return nil, fmt.Errorf("unable to perform CPU IO profile with %d goroutines", n)
		}
		dirPath, err := os.MkdirTemp("", "profile")
		if err != nil {
			return nil, err
		}
		fn := filepath.Join(dirPath, "cpuio.out")
		f, err := Create(fn)
		if err != nil {
			return nil, err
		}
		stop := fgprof.Start(f, fgprof.FormatPprof)
		prof.stopFn = func() ([]byte, error) {
			err := stop()
			if err != nil {

void TensorHandleSilentCopy(bool async,
                            TFE_ContextDevicePlacementPolicy global_policy,
                            TFE_ContextDevicePlacementPolicy thread_policy,
                            bool cpu_op) {
  std::unique_ptr<TF_Status, decltype(&TF_DeleteStatus)> status(
      TF_NewStatus(), TF_DeleteStatus);
  TFE_ContextOptions* opts = TFE_NewContextOptions();