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1 files changed, 0 insertions, 532 deletions

diff --git a/vendor/golang.org/x/net/trace/events.go b/vendor/golang.org/x/net/trace/events.go
deleted file mode 100644
index c646a69..0000000
--- a/vendor/golang.org/x/net/trace/events.go
+++ /dev/null
@@ -1,532 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package trace
-
-import (
-	"bytes"
-	"fmt"
-	"html/template"
-	"io"
-	"log"
-	"net/http"
-	"runtime"
-	"sort"
-	"strconv"
-	"strings"
-	"sync"
-	"sync/atomic"
-	"text/tabwriter"
-	"time"
-)
-
-const maxEventsPerLog = 100
-
-type bucket struct {
-	MaxErrAge time.Duration
-	String    string
-}
-
-var buckets = []bucket{
-	{0, "total"},
-	{10 * time.Second, "errs<10s"},
-	{1 * time.Minute, "errs<1m"},
-	{10 * time.Minute, "errs<10m"},
-	{1 * time.Hour, "errs<1h"},
-	{10 * time.Hour, "errs<10h"},
-	{24000 * time.Hour, "errors"},
-}
-
-// RenderEvents renders the HTML page typically served at /debug/events.
-// It does not do any auth checking. The request may be nil.
-//
-// Most users will use the Events handler.
-func RenderEvents(w http.ResponseWriter, req *http.Request, sensitive bool) {
-	now := time.Now()
-	data := &struct {
-		Families []string // family names
-		Buckets  []bucket
-		Counts   [][]int // eventLog count per family/bucket
-
-		// Set when a bucket has been selected.
-		Family    string
-		Bucket    int
-		EventLogs eventLogs
-		Expanded  bool
-	}{
-		Buckets: buckets,
-	}
-
-	data.Families = make([]string, 0, len(families))
-	famMu.RLock()
-	for name := range families {
-		data.Families = append(data.Families, name)
-	}
-	famMu.RUnlock()
-	sort.Strings(data.Families)
-
-	// Count the number of eventLogs in each family for each error age.
-	data.Counts = make([][]int, len(data.Families))
-	for i, name := range data.Families {
-		// TODO(sameer): move this loop under the family lock.
-		f := getEventFamily(name)
-		data.Counts[i] = make([]int, len(data.Buckets))
-		for j, b := range data.Buckets {
-			data.Counts[i][j] = f.Count(now, b.MaxErrAge)
-		}
-	}
-
-	if req != nil {
-		var ok bool
-		data.Family, data.Bucket, ok = parseEventsArgs(req)
-		if !ok {
-			// No-op
-		} else {
-			data.EventLogs = getEventFamily(data.Family).Copy(now, buckets[data.Bucket].MaxErrAge)
-		}
-		if data.EventLogs != nil {
-			defer data.EventLogs.Free()
-			sort.Sort(data.EventLogs)
-		}
-		if exp, err := strconv.ParseBool(req.FormValue("exp")); err == nil {
-			data.Expanded = exp
-		}
-	}
-
-	famMu.RLock()
-	defer famMu.RUnlock()
-	if err := eventsTmpl().Execute(w, data); err != nil {
-		log.Printf("net/trace: Failed executing template: %v", err)
-	}
-}
-
-func parseEventsArgs(req *http.Request) (fam string, b int, ok bool) {
-	fam, bStr := req.FormValue("fam"), req.FormValue("b")
-	if fam == "" || bStr == "" {
-		return "", 0, false
-	}
-	b, err := strconv.Atoi(bStr)
-	if err != nil || b < 0 || b >= len(buckets) {
-		return "", 0, false
-	}
-	return fam, b, true
-}
-
-// An EventLog provides a log of events associated with a specific object.
-type EventLog interface {
-	// Printf formats its arguments with fmt.Sprintf and adds the
-	// result to the event log.
-	Printf(format string, a ...interface{})
-
-	// Errorf is like Printf, but it marks this event as an error.
-	Errorf(format string, a ...interface{})
-
-	// Finish declares that this event log is complete.
-	// The event log should not be used after calling this method.
-	Finish()
-}
-
-// NewEventLog returns a new EventLog with the specified family name
-// and title.
-func NewEventLog(family, title string) EventLog {
-	el := newEventLog()
-	el.ref()
-	el.Family, el.Title = family, title
-	el.Start = time.Now()
-	el.events = make([]logEntry, 0, maxEventsPerLog)
-	el.stack = make([]uintptr, 32)
-	n := runtime.Callers(2, el.stack)
-	el.stack = el.stack[:n]
-
-	getEventFamily(family).add(el)
-	return el
-}
-
-func (el *eventLog) Finish() {
-	getEventFamily(el.Family).remove(el)
-	el.unref() // matches ref in New
-}
-
-var (
-	famMu    sync.RWMutex
-	families = make(map[string]*eventFamily) // family name => family
-)
-
-func getEventFamily(fam string) *eventFamily {
-	famMu.Lock()
-	defer famMu.Unlock()
-	f := families[fam]
-	if f == nil {
-		f = &eventFamily{}
-		families[fam] = f
-	}
-	return f
-}
-
-type eventFamily struct {
-	mu        sync.RWMutex
-	eventLogs eventLogs
-}
-
-func (f *eventFamily) add(el *eventLog) {
-	f.mu.Lock()
-	f.eventLogs = append(f.eventLogs, el)
-	f.mu.Unlock()
-}
-
-func (f *eventFamily) remove(el *eventLog) {
-	f.mu.Lock()
-	defer f.mu.Unlock()
-	for i, el0 := range f.eventLogs {
-		if el == el0 {
-			copy(f.eventLogs[i:], f.eventLogs[i+1:])
-			f.eventLogs = f.eventLogs[:len(f.eventLogs)-1]
-			return
-		}
-	}
-}
-
-func (f *eventFamily) Count(now time.Time, maxErrAge time.Duration) (n int) {
-	f.mu.RLock()
-	defer f.mu.RUnlock()
-	for _, el := range f.eventLogs {
-		if el.hasRecentError(now, maxErrAge) {
-			n++
-		}
-	}
-	return
-}
-
-func (f *eventFamily) Copy(now time.Time, maxErrAge time.Duration) (els eventLogs) {
-	f.mu.RLock()
-	defer f.mu.RUnlock()
-	els = make(eventLogs, 0, len(f.eventLogs))
-	for _, el := range f.eventLogs {
-		if el.hasRecentError(now, maxErrAge) {
-			el.ref()
-			els = append(els, el)
-		}
-	}
-	return
-}
-
-type eventLogs []*eventLog
-
-// Free calls unref on each element of the list.
-func (els eventLogs) Free() {
-	for _, el := range els {
-		el.unref()
-	}
-}
-
-// eventLogs may be sorted in reverse chronological order.
-func (els eventLogs) Len() int           { return len(els) }
-func (els eventLogs) Less(i, j int) bool { return els[i].Start.After(els[j].Start) }
-func (els eventLogs) Swap(i, j int)      { els[i], els[j] = els[j], els[i] }
-
-// A logEntry is a timestamped log entry in an event log.
-type logEntry struct {
-	When    time.Time
-	Elapsed time.Duration // since previous event in log
-	NewDay  bool          // whether this event is on a different day to the previous event
-	What    string
-	IsErr   bool
-}
-
-// WhenString returns a string representation of the elapsed time of the event.
-// It will include the date if midnight was crossed.
-func (e logEntry) WhenString() string {
-	if e.NewDay {
-		return e.When.Format("2006/01/02 15:04:05.000000")
-	}
-	return e.When.Format("15:04:05.000000")
-}
-
-// An eventLog represents an active event log.
-type eventLog struct {
-	// Family is the top-level grouping of event logs to which this belongs.
-	Family string
-
-	// Title is the title of this event log.
-	Title string
-
-	// Timing information.
-	Start time.Time
-
-	// Call stack where this event log was created.
-	stack []uintptr
-
-	// Append-only sequence of events.
-	//
-	// TODO(sameer): change this to a ring buffer to avoid the array copy
-	// when we hit maxEventsPerLog.
-	mu            sync.RWMutex
-	events        []logEntry
-	LastErrorTime time.Time
-	discarded     int
-
-	refs int32 // how many buckets this is in
-}
-
-func (el *eventLog) reset() {
-	// Clear all but the mutex. Mutexes may not be copied, even when unlocked.
-	el.Family = ""
-	el.Title = ""
-	el.Start = time.Time{}
-	el.stack = nil
-	el.events = nil
-	el.LastErrorTime = time.Time{}
-	el.discarded = 0
-	el.refs = 0
-}
-
-func (el *eventLog) hasRecentError(now time.Time, maxErrAge time.Duration) bool {
-	if maxErrAge == 0 {
-		return true
-	}
-	el.mu.RLock()
-	defer el.mu.RUnlock()
-	return now.Sub(el.LastErrorTime) < maxErrAge
-}
-
-// delta returns the elapsed time since the last event or the log start,
-// and whether it spans midnight.
-// L >= el.mu
-func (el *eventLog) delta(t time.Time) (time.Duration, bool) {
-	if len(el.events) == 0 {
-		return t.Sub(el.Start), false
-	}
-	prev := el.events[len(el.events)-1].When
-	return t.Sub(prev), prev.Day() != t.Day()
-
-}
-
-func (el *eventLog) Printf(format string, a ...interface{}) {
-	el.printf(false, format, a...)
-}
-
-func (el *eventLog) Errorf(format string, a ...interface{}) {
-	el.printf(true, format, a...)
-}
-
-func (el *eventLog) printf(isErr bool, format string, a ...interface{}) {
-	e := logEntry{When: time.Now(), IsErr: isErr, What: fmt.Sprintf(format, a...)}
-	el.mu.Lock()
-	e.Elapsed, e.NewDay = el.delta(e.When)
-	if len(el.events) < maxEventsPerLog {
-		el.events = append(el.events, e)
-	} else {
-		// Discard the oldest event.
-		if el.discarded == 0 {
-			// el.discarded starts at two to count for the event it
-			// is replacing, plus the next one that we are about to
-			// drop.
-			el.discarded = 2
-		} else {
-			el.discarded++
-		}
-		// TODO(sameer): if this causes allocations on a critical path,
-		// change eventLog.What to be a fmt.Stringer, as in trace.go.
-		el.events[0].What = fmt.Sprintf("(%d events discarded)", el.discarded)
-		// The timestamp of the discarded meta-event should be
-		// the time of the last event it is representing.
-		el.events[0].When = el.events[1].When
-		copy(el.events[1:], el.events[2:])
-		el.events[maxEventsPerLog-1] = e
-	}
-	if e.IsErr {
-		el.LastErrorTime = e.When
-	}
-	el.mu.Unlock()
-}
-
-func (el *eventLog) ref() {
-	atomic.AddInt32(&el.refs, 1)
-}
-
-func (el *eventLog) unref() {
-	if atomic.AddInt32(&el.refs, -1) == 0 {
-		freeEventLog(el)
-	}
-}
-
-func (el *eventLog) When() string {
-	return el.Start.Format("2006/01/02 15:04:05.000000")
-}
-
-func (el *eventLog) ElapsedTime() string {
-	elapsed := time.Since(el.Start)
-	return fmt.Sprintf("%.6f", elapsed.Seconds())
-}
-
-func (el *eventLog) Stack() string {
-	buf := new(bytes.Buffer)
-	tw := tabwriter.NewWriter(buf, 1, 8, 1, '\t', 0)
-	printStackRecord(tw, el.stack)
-	tw.Flush()
-	return buf.String()
-}
-
-// printStackRecord prints the function + source line information
-// for a single stack trace.
-// Adapted from runtime/pprof/pprof.go.
-func printStackRecord(w io.Writer, stk []uintptr) {
-	for _, pc := range stk {
-		f := runtime.FuncForPC(pc)
-		if f == nil {
-			continue
-		}
-		file, line := f.FileLine(pc)
-		name := f.Name()
-		// Hide runtime.goexit and any runtime functions at the beginning.
-		if strings.HasPrefix(name, "runtime.") {
-			continue
-		}
-		fmt.Fprintf(w, "#   %s\t%s:%d\n", name, file, line)
-	}
-}
-
-func (el *eventLog) Events() []logEntry {
-	el.mu.RLock()
-	defer el.mu.RUnlock()
-	return el.events
-}
-
-// freeEventLogs is a freelist of *eventLog
-var freeEventLogs = make(chan *eventLog, 1000)
-
-// newEventLog returns a event log ready to use.
-func newEventLog() *eventLog {
-	select {
-	case el := <-freeEventLogs:
-		return el
-	default:
-		return new(eventLog)
-	}
-}
-
-// freeEventLog adds el to freeEventLogs if there's room.
-// This is non-blocking.
-func freeEventLog(el *eventLog) {
-	el.reset()
-	select {
-	case freeEventLogs <- el:
-	default:
-	}
-}
-
-var eventsTmplCache *template.Template
-var eventsTmplOnce sync.Once
-
-func eventsTmpl() *template.Template {
-	eventsTmplOnce.Do(func() {
-		eventsTmplCache = template.Must(template.New("events").Funcs(template.FuncMap{
-			"elapsed":   elapsed,
-			"trimSpace": strings.TrimSpace,
-		}).Parse(eventsHTML))
-	})
-	return eventsTmplCache
-}
-
-const eventsHTML = `
-<html>
-	<head>
-		<title>events</title>
-	</head>
-	<style type="text/css">
-		body {
-			font-family: sans-serif;
-		}
-		table#req-status td.family {
-			padding-right: 2em;
-		}
-		table#req-status td.active {
-			padding-right: 1em;
-		}
-		table#req-status td.empty {
-			color: #aaa;
-		}
-		table#reqs {
-			margin-top: 1em;
-		}
-		table#reqs tr.first {
-			{{if $.Expanded}}font-weight: bold;{{end}}
-		}
-		table#reqs td {
-			font-family: monospace;
-		}
-		table#reqs td.when {
-			text-align: right;
-			white-space: nowrap;
-		}
-		table#reqs td.elapsed {
-			padding: 0 0.5em;
-			text-align: right;
-			white-space: pre;
-			width: 10em;
-		}
-		address {
-			font-size: smaller;
-			margin-top: 5em;
-		}
-	</style>
-	<body>
-
-<h1>/debug/events</h1>
-
-<table id="req-status">
-	{{range $i, $fam := .Families}}
-	<tr>
-		<td class="family">{{$fam}}</td>
-
-	        {{range $j, $bucket := $.Buckets}}
-	        {{$n := index $.Counts $i $j}}
-		<td class="{{if not $bucket.MaxErrAge}}active{{end}}{{if not $n}}empty{{end}}">
-	                {{if $n}}<a href="?fam={{$fam}}&b={{$j}}{{if $.Expanded}}&exp=1{{end}}">{{end}}
-		        [{{$n}} {{$bucket.String}}]
-			{{if $n}}</a>{{end}}
-		</td>
-                {{end}}
-
-	</tr>{{end}}
-</table>
-
-{{if $.EventLogs}}
-<hr />
-<h3>Family: {{$.Family}}</h3>
-
-{{if $.Expanded}}<a href="?fam={{$.Family}}&b={{$.Bucket}}">{{end}}
-[Summary]{{if $.Expanded}}</a>{{end}}
-
-{{if not $.Expanded}}<a href="?fam={{$.Family}}&b={{$.Bucket}}&exp=1">{{end}}
-[Expanded]{{if not $.Expanded}}</a>{{end}}
-
-<table id="reqs">
-	<tr><th>When</th><th>Elapsed</th></tr>
-	{{range $el := $.EventLogs}}
-	<tr class="first">
-		<td class="when">{{$el.When}}</td>
-		<td class="elapsed">{{$el.ElapsedTime}}</td>
-		<td>{{$el.Title}}
-	</tr>
-	{{if $.Expanded}}
-	<tr>
-		<td class="when"></td>
-		<td class="elapsed"></td>
-		<td><pre>{{$el.Stack|trimSpace}}</pre></td>
-	</tr>
-	{{range $el.Events}}
-	<tr>
-		<td class="when">{{.WhenString}}</td>
-		<td class="elapsed">{{elapsed .Elapsed}}</td>
-		<td>.{{if .IsErr}}E{{else}}.{{end}}. {{.What}}</td>
-	</tr>
-	{{end}}
-	{{end}}
-	{{end}}
-</table>
-{{end}}
-	</body>
-</html>
-`