// license that can be found in the LICENSE file.

package main

import (
	"fmt"
	"os"
	"runtime/pprof"
	"time"
)

func init() {
	register("TimeProf", TimeProf)
}

func TimeProf() {
	f, err := os.CreateTemp("", "timeprof")
	if err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(2)
	}

	if err := pprof.StartCPUProfile(f); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(2)
	}

		t.Skipf("skipping on %s because nanotime calls libc", runtime.GOOS)
	}

	// Pass GOTRACEBACK for issue #41120 to try to get more
	// information on timeout.
	fn := runTestProg(t, "testprog", "TimeProf", "GOTRACEBACK=crash")
	fn = strings.TrimSpace(fn)
	defer os.Remove(fn)

	cmd := testenv.CleanCmdEnv(exec.Command(testenv.GoToolPath(t), "tool", "pprof", "-top", "-nodecount=1", fn))

	N         int
	benchmark InternalBenchmark
	bytes     int64
	timerOn   bool
	result    BenchmarkResult
}

// StartTimer starts timing a test. This function is called automatically
// before a benchmark starts, but it can also used to resume timing after
// a call to StopTimer.
func (b *B) StartTimer() {
	if !b.timerOn {
		b.start = time.Now()
		b.timerOn = true
	}
}

// before a benchmark starts, but it can also be used to resume timing after
// a call to [B.StopTimer].
func (b *B) StartTimer() {
	if !b.timerOn {
		runtime.ReadMemStats(&memStats)
		b.startAllocs = memStats.Mallocs
		b.startBytes = memStats.TotalAlloc
		b.start = highPrecisionTimeNow()
		b.timerOn = true
	}
}

// StopTimer stops timing a test. This can be used to pause the timer

[], "spaceLength": 10, "stack": false, "steppedLine": false, "targets": [ { "expr": "sum(istio_build{component=\"pilot\"}) by (tag)", "format": "time_series", "intervalFactor": 1, "legendFormat": "{{ tag }}", "refId": "A" } ], "thresholds": [], "timeFrom": null, "timeRegions": [], "timeShift": null, "title": "Pilot Versions", "tooltip": { "shared": true, "sort": 0, "value_type": "individual" }, "type": "graph", "xaxis": { "buckets": null, "mode": "time", "name": null, "show": true, "values": [] },...

TYPES
	// B is a type passed to Benchmark functions to manage benchmark ...
	type B struct {
		common
		N		int
		benchmark	InternalBenchmark
		bytes		int64
		timerOn		bool
		result		BenchmarkResult
	}

	// Error is equivalent to Log() followed by Fail(). 
	func (c *B) Error(args ...any)

	// Errorf is equivalent to Logf() followed by Fail(). 

              {
                "id": "custom.align",
                "value": null
              }
            ]
          }
        ]
      },
      "hideTimeOverride": false,
      "timeFrom": null,
      "transformations": [
        {
          "id": "merge",
          "options": {
            "reducers": []
          }
        }
      ],
      "pluginVersion": "10.1.5"

// Setitimer.
type ItimerWhich int

// Possible which values for Getitimer and Setitimer.
const (
	ItimerReal    ItimerWhich = ITIMER_REAL
	ItimerVirtual ItimerWhich = ITIMER_VIRTUAL
	ItimerProf    ItimerWhich = ITIMER_PROF
)

// Getitimer wraps getitimer(2) to return the current value of the timer
// specified by which.
func Getitimer(which ItimerWhich) (Itimerval, error) {
	var it Itimerval

	EM_STM8          Machine = 186 /* STMicroeletronics STM8 8-bit microcontroller */
	EM_TILE64        Machine = 187 /* Tilera TILE64 multicore architecture family */
	EM_TILEPRO       Machine = 188 /* Tilera TILEPro multicore architecture family */
	EM_MICROBLAZE    Machine = 189 /* Xilinx MicroBlaze 32-bit RISC soft processor core */
	EM_CUDA          Machine = 190 /* NVIDIA CUDA architecture */

t"},{"id":"decimals","value":2},{"id":"links","value":[{"title":"$__cell dashboard","url":"/dashboard/db/istio-service-dashboard?var-service=${__cell_1:raw}","targetBlank":false}]},{"id":"custom.align","value":null}]}]},"hideTimeOverride":false,"timeFrom":null,"transformations":[{"id":"merge","options":{"reducers":[]}}],"pluginVersion":"10.1.5"},{"aliasColors":{},"bars":false,"dashLength":10,"dashes":false,"datasource":{"type":"prometheus","uid":"${datasource}"},"fill":1,"gridPos":{"h":9,"w":24,...