PNG  IHDRxsBIT|d pHYs+tEXtSoftwarewww.inkscape.org<,tEXtComment File Manager

File Manager

Path: /opt/golang/1.22.0/src/runtime/coverage/testdata/

Viewing File: harness.go

// Copyright 2022 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 main

import (
	"flag"
	"fmt"
	"internal/coverage/slicewriter"
	"io"
	"io/ioutil"
	"log"
	"path/filepath"
	"runtime/coverage"
	"strings"
)

var verbflag = flag.Int("v", 0, "Verbose trace output level")
var testpointflag = flag.String("tp", "", "Testpoint to run")
var outdirflag = flag.String("o", "", "Output dir into which to emit")

func emitToWriter() {
	log.SetPrefix("emitToWriter: ")
	var slwm slicewriter.WriteSeeker
	if err := coverage.WriteMeta(&slwm); err != nil {
		log.Fatalf("error: WriteMeta returns %v", err)
	}
	mf := filepath.Join(*outdirflag, "covmeta.0abcdef")
	if err := ioutil.WriteFile(mf, slwm.BytesWritten(), 0666); err != nil {
		log.Fatalf("error: writing %s: %v", mf, err)
	}
	var slwc slicewriter.WriteSeeker
	if err := coverage.WriteCounters(&slwc); err != nil {
		log.Fatalf("error: WriteCounters returns %v", err)
	}
	cf := filepath.Join(*outdirflag, "covcounters.0abcdef.99.77")
	if err := ioutil.WriteFile(cf, slwc.BytesWritten(), 0666); err != nil {
		log.Fatalf("error: writing %s: %v", cf, err)
	}
}

func emitToDir() {
	log.SetPrefix("emitToDir: ")
	if err := coverage.WriteMetaDir(*outdirflag); err != nil {
		log.Fatalf("error: WriteMetaDir returns %v", err)
	}
	if err := coverage.WriteCountersDir(*outdirflag); err != nil {
		log.Fatalf("error: WriteCountersDir returns %v", err)
	}
}

func emitToNonexistentDir() {
	log.SetPrefix("emitToNonexistentDir: ")

	want := []string{
		"no such file or directory",             // linux-ish
		"system cannot find the file specified", // windows
		"does not exist",                        // plan9
	}

	checkWant := func(which string, got string) {
		found := false
		for _, w := range want {
			if strings.Contains(got, w) {
				found = true
				break
			}
		}
		if !found {
			log.Fatalf("%s emit to bad dir: got error:\n  %v\nwanted error with one of:\n  %+v", which, got, want)
		}
	}

	// Mangle the output directory to produce something nonexistent.
	mangled := *outdirflag + "_MANGLED"
	if err := coverage.WriteMetaDir(mangled); err == nil {
		log.Fatal("expected error from WriteMetaDir to nonexistent dir")
	} else {
		got := fmt.Sprintf("%v", err)
		checkWant("meta data", got)
	}

	// Now try to emit counter data file to a bad dir.
	if err := coverage.WriteCountersDir(mangled); err == nil {
		log.Fatal("expected error emitting counter data to bad dir")
	} else {
		got := fmt.Sprintf("%v", err)
		checkWant("counter data", got)
	}
}

func emitToUnwritableDir() {
	log.SetPrefix("emitToUnwritableDir: ")

	want := "permission denied"

	if err := coverage.WriteMetaDir(*outdirflag); err == nil {
		log.Fatal("expected error from WriteMetaDir to unwritable dir")
	} else {
		got := fmt.Sprintf("%v", err)
		if !strings.Contains(got, want) {
			log.Fatalf("meta-data emit to unwritable dir: wanted error containing %q got %q", want, got)
		}
	}

	// Similarly with writing counter data.
	if err := coverage.WriteCountersDir(*outdirflag); err == nil {
		log.Fatal("expected error emitting counter data to unwritable dir")
	} else {
		got := fmt.Sprintf("%v", err)
		if !strings.Contains(got, want) {
			log.Fatalf("emitting counter data to unwritable dir: wanted error containing %q got %q", want, got)
		}
	}
}

func emitToNilWriter() {
	log.SetPrefix("emitToWriter: ")
	want := "nil writer"
	var bad io.WriteSeeker
	if err := coverage.WriteMeta(bad); err == nil {
		log.Fatal("expected error passing nil writer for meta emit")
	} else {
		got := fmt.Sprintf("%v", err)
		if !strings.Contains(got, want) {
			log.Fatalf("emitting meta-data passing nil writer: wanted error containing %q got %q", want, got)
		}
	}

	if err := coverage.WriteCounters(bad); err == nil {
		log.Fatal("expected error passing nil writer for counter emit")
	} else {
		got := fmt.Sprintf("%v", err)
		if !strings.Contains(got, want) {
			log.Fatalf("emitting counter data passing nil writer: wanted error containing %q got %q", want, got)
		}
	}
}

type failingWriter struct {
	writeCount int
	writeLimit int
	slws       slicewriter.WriteSeeker
}

func (f *failingWriter) Write(p []byte) (n int, err error) {
	c := f.writeCount
	f.writeCount++
	if f.writeLimit < 0 || c < f.writeLimit {
		return f.slws.Write(p)
	}
	return 0, fmt.Errorf("manufactured write error")
}

func (f *failingWriter) Seek(offset int64, whence int) (int64, error) {
	return f.slws.Seek(offset, whence)
}

func (f *failingWriter) reset(lim int) {
	f.writeCount = 0
	f.writeLimit = lim
	f.slws = slicewriter.WriteSeeker{}
}

func writeStressTest(tag string, testf func(testf *failingWriter) error) {
	// Invoke the function initially without the write limit
	// set, to capture the number of writes performed.
	fw := &failingWriter{writeLimit: -1}
	testf(fw)

	// Now that we know how many writes are going to happen, run the
	// function repeatedly, each time with a Write operation set to
	// fail at a new spot. The goal here is to make sure that:
	// A) an error is reported, and B) nothing crashes.
	tot := fw.writeCount
	for i := 0; i < tot; i++ {
		fw.reset(i)
		err := testf(fw)
		if err == nil {
			log.Fatalf("no error from write %d tag %s", i, tag)
		}
	}
}

func postClear() int {
	return 42
}

func preClear() int {
	return 42
}

// This test is designed to ensure that write errors are properly
// handled by the code that writes out coverage data. It repeatedly
// invokes the 'emit to writer' apis using a specially crafted writer
// that captures the total number of expected writes, then replays the
// execution N times with a manufactured write error at the
// appropriate spot.
func emitToFailingWriter() {
	log.SetPrefix("emitToFailingWriter: ")

	writeStressTest("emit-meta", func(f *failingWriter) error {
		return coverage.WriteMeta(f)
	})
	writeStressTest("emit-counter", func(f *failingWriter) error {
		return coverage.WriteCounters(f)
	})
}

func emitWithCounterClear() {
	log.SetPrefix("emitWitCounterClear: ")
	preClear()
	if err := coverage.ClearCounters(); err != nil {
		log.Fatalf("clear failed: %v", err)
	}
	postClear()
	if err := coverage.WriteMetaDir(*outdirflag); err != nil {
		log.Fatalf("error: WriteMetaDir returns %v", err)
	}
	if err := coverage.WriteCountersDir(*outdirflag); err != nil {
		log.Fatalf("error: WriteCountersDir returns %v", err)
	}
}

func final() int {
	println("I run last.")
	return 43
}

func main() {
	log.SetFlags(0)
	flag.Parse()
	if *testpointflag == "" {
		log.Fatalf("error: no testpoint (use -tp flag)")
	}
	if *outdirflag == "" {
		log.Fatalf("error: no output dir specified (use -o flag)")
	}
	switch *testpointflag {
	case "emitToDir":
		emitToDir()
	case "emitToWriter":
		emitToWriter()
	case "emitToNonexistentDir":
		emitToNonexistentDir()
	case "emitToUnwritableDir":
		emitToUnwritableDir()
	case "emitToNilWriter":
		emitToNilWriter()
	case "emitToFailingWriter":
		emitToFailingWriter()
	case "emitWithCounterClear":
		emitWithCounterClear()
	default:
		log.Fatalf("error: unknown testpoint %q", *testpointflag)
	}
	final()
}
b IDATxytVսϓ22 A@IR :hCiZ[v*E:WũZA ^dQeQ @ !jZ'>gsV仿$|?g)&x-EIENT ;@xT.i%-X}SvS5.r/UHz^_$-W"w)Ɗ/@Z &IoX P$K}JzX:;` &, ŋui,e6mX ԵrKb1ԗ)DADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADA݀!I*]R;I2$eZ#ORZSrr6mteffu*((Pu'v{DIߔ4^pIm'77WEEE;vƎ4-$]'RI{\I&G :IHJ DWBB=\WR޽m o$K(V9ABB.}jѢv`^?IOȅ} ڶmG}T#FJ`56$-ھ}FI&v;0(h;Б38CӧOWf!;A i:F_m9s&|q%=#wZprrrla A &P\\СC[A#! {olF} `E2}MK/vV)i{4BffV\|ۭX`b@kɶ@%i$K z5zhmX[IXZ` 'b%$r5M4º/l ԃߖxhʔ)[@=} K6IM}^5k㏷݆z ΗÿO:gdGBmyT/@+Vɶ纽z񕏵l.y޴it뭷zV0[Y^>Wsqs}\/@$(T7f.InݺiR$푔n.~?H))\ZRW'Mo~v Ov6oԃxz! S,&xm/yɞԟ?'uaSѽb,8GלKboi&3t7Y,)JJ c[nzӳdE&KsZLӄ I?@&%ӟ۶mSMMњ0iؐSZ,|J+N ~,0A0!5%Q-YQQa3}$_vVrf9f?S8`zDADADADADADADADADAdqP,تmMmg1V?rSI꒟]u|l RCyEf٢9 jURbztѰ!m5~tGj2DhG*{H9)꒟ר3:(+3\?/;TUݭʴ~S6lڧUJ*i$d(#=Yݺd{,p|3B))q:vN0Y.jkק6;SɶVzHJJЀ-utѹսk>QUU\޲~]fFnK?&ߡ5b=z9)^|u_k-[y%ZNU6 7Mi:]ۦtk[n X(e6Bb."8cۭ|~teuuw|ήI-5"~Uk;ZicEmN/:]M> cQ^uiƞ??Ңpc#TUU3UakNwA`:Y_V-8.KKfRitv޲* 9S6ֿj,ՃNOMߤ]z^fOh|<>@Å5 _/Iu?{SY4hK/2]4%it5q]GGe2%iR| W&f*^]??vq[LgE_3f}Fxu~}qd-ږFxu~I N>\;͗O֊:̗WJ@BhW=y|GgwܷH_NY?)Tdi'?խwhlmQi !SUUsw4kӺe4rfxu-[nHtMFj}H_u~w>)oV}(T'ebʒv3_[+vn@Ȭ\S}ot}w=kHFnxg S 0eޢm~l}uqZfFoZuuEg `zt~? b;t%>WTkķh[2eG8LIWx,^\thrl^Ϊ{=dž<}qV@ ⠨Wy^LF_>0UkDuʫuCs$)Iv:IK;6ֲ4{^6եm+l3>݆uM 9u?>Zc }g~qhKwڭeFMM~pМuqǿz6Tb@8@Y|jx](^]gf}M"tG -w.@vOqh~/HII`S[l.6nØXL9vUcOoB\xoǤ'T&IǍQw_wpv[kmO{w~>#=P1Pɞa-we:iǏlHo׈꒟f9SzH?+shk%Fs:qVhqY`jvO'ρ?PyX3lх]˾uV{ݞ]1,MzYNW~̈́ joYn}ȚF߾׮mS]F z+EDxm/d{F{-W-4wY듏:??_gPf ^3ecg ҵs8R2מz@TANGj)}CNi/R~}c:5{!ZHӋӾ6}T]G]7W6^n 9*,YqOZj:P?Q DFL|?-^.Ɵ7}fFh׶xe2Pscz1&5\cn[=Vn[ĶE鎀uˌd3GII k;lNmشOuuRVfBE]ۣeӶu :X-[(er4~LHi6:Ѻ@ԅrST0trk%$Č0ez" *z"T/X9|8.C5Feg}CQ%͞ˣJvL/?j^h&9xF`њZ(&yF&Iݻfg#W;3^{Wo^4'vV[[K';+mӍִ]AC@W?1^{එyh +^]fm~iԵ]AB@WTk̏t uR?l.OIHiYyԶ]Aˀ7c:q}ힽaf6Z~қm(+sK4{^6}T*UUu]n.:kx{:2 _m=sAߤU@?Z-Vކеz왍Nэ{|5 pڶn b p-@sPg]0G7fy-M{GCF'%{4`=$-Ge\ eU:m+Zt'WjO!OAF@ik&t݆ϥ_ e}=]"Wz_.͜E3leWFih|t-wZۍ-uw=6YN{6|} |*={Ѽn.S.z1zjۻTH]흾 DuDvmvK.`V]yY~sI@t?/ϓ. m&["+P?MzovVЫG3-GRR[(!!\_,^%?v@ҵő m`Y)tem8GMx.))A]Y i`ViW`?^~!S#^+ѽGZj?Vģ0.))A꨷lzL*]OXrY`DBBLOj{-MH'ii-ϰ ok7^ )쭡b]UXSְmռY|5*cֽk0B7镹%ڽP#8nȎq}mJr23_>lE5$iwui+ H~F`IjƵ@q \ @#qG0".0" l`„.0! ,AQHN6qzkKJ#o;`Xv2>,tێJJ7Z/*A .@fفjMzkg @TvZH3Zxu6Ra'%O?/dQ5xYkU]Rֽkق@DaS^RSּ5|BeHNN͘p HvcYcC5:y #`οb;z2.!kr}gUWkyZn=f Pvsn3p~;4p˚=ē~NmI] ¾ 0lH[_L hsh_ғߤc_њec)g7VIZ5yrgk̞W#IjӪv>՞y睝M8[|]\շ8M6%|@PZڨI-m>=k='aiRo-x?>Q.}`Ȏ:Wsmu u > .@,&;+!!˱tﭧDQwRW\vF\~Q7>spYw$%A~;~}6¾ g&if_=j,v+UL1(tWake:@Ș>j$Gq2t7S?vL|]u/ .(0E6Mk6hiۺzښOrifޱxm/Gx> Lal%%~{lBsR4*}{0Z/tNIɚpV^#Lf:u@k#RSu =S^ZyuR/.@n&΃z~B=0eg뺆#,Þ[B/?H uUf7y Wy}Bwegל`Wh(||`l`.;Ws?V@"c:iɍL֯PGv6zctM̠':wuW;d=;EveD}9J@B(0iհ bvP1{\P&G7D޴Iy_$-Qjm~Yrr&]CDv%bh|Yzni_ˆR;kg}nJOIIwyuL}{ЌNj}:+3Y?:WJ/N+Rzd=hb;dj͒suݔ@NKMԄ jqzC5@y°hL m;*5ezᕏ=ep XL n?מ:r`۵tŤZ|1v`V뽧_csج'ߤ%oTuumk%%%h)uy]Nk[n 'b2 l.=͜E%gf$[c;s:V-͞WߤWh-j7]4=F-X]>ZLSi[Y*We;Zan(ӇW|e(HNNP5[= r4tP &0<pc#`vTNV GFqvTi*Tyam$ߏWyE*VJKMTfFw>'$-ؽ.Ho.8c"@DADADADADADADADADA~j*֘,N;Pi3599h=goضLgiJ5փy~}&Zd9p֚ e:|hL``b/d9p? fgg+%%hMgXosج, ΩOl0Zh=xdjLmhݻoO[g_l,8a]٭+ӧ0$I]c]:粹:Teꢢ"5a^Kgh,&= =՟^߶“ߢE ܹS J}I%:8 IDAT~,9/ʃPW'Mo}zNƍ쨓zPbNZ~^z=4mswg;5 Y~SVMRXUյڱRf?s:w ;6H:ºi5-maM&O3;1IKeamZh͛7+##v+c ~u~ca]GnF'ټL~PPPbn voC4R,ӟgg %hq}@#M4IÇ Oy^xMZx ) yOw@HkN˖-Sǎmb]X@n+i͖!++K3gd\$mt$^YfJ\8PRF)77Wא!Cl$i:@@_oG I{$# 8磌ŋ91A (Im7֭>}ߴJq7ޗt^ -[ԩSj*}%]&' -ɓ'ꫯVzzvB#;a 7@GxI{j޼ƌ.LÇWBB7`O"I$/@R @eee@۷>}0,ɒ2$53Xs|cS~rpTYYY} kHc %&k.], @ADADADADADADADADA@lT<%''*Lo^={رc5h %$+CnܸQ3fҥK}vUVVs9G R,_{xˇ3o߾;TTTd}馛]uuuG~iԩ@4bnvmvfϞ /Peeeq}}za I~,誫{UWW뮻}_~YƍSMMMYχ֝waw\ďcxꩧtEƍկ_?۷5@u?1kNׯWzz/wy>}zj3 k(ٺuq_Zvf̘:~ ABQ&r|!%KҥKgԞ={<_X-z !CyFUUz~ ABQIIIjݺW$UXXDٳZ~ ABQƍecW$<(~<RSSvZujjjԧOZQu@4 8m&&&jԩg$ď1h ͟?_{768@g =@`)))5o6m3)ѣƌJ;wҿUTT /KZR{~a=@0o<*狔iFɶ[ˎ;T]]OX@?K.ۈxN pppppppppppppppppPfl߾] ,{ァk۶mڿo5BTӦMӴiӴ|r DB2e|An!Dy'tkΝ[A $***t5' "!駟oaDnΝ:t֭[gDШQ06qD;@ x M6v(PiizmZ4ew"@̴ixf [~-Fٱc&IZ2|n!?$@{[HTɏ#@hȎI# _m(F /6Z3z'\r,r!;w2Z3j=~GY7"I$iI.p_"?pN`y DD?: _  Gÿab7J !Bx@0 Bo cG@`1C[@0G @`0C_u V1 aCX>W ` | `!<S `"<. `#c`?cAC4 ?c p#~@0?:08&_MQ1J h#?/`7;I  q 7a wQ A 1 Hp !#<8/#@1Ul7=S=K.4Z?E_$i@!1!E4?`P_  @Bă10#: "aU,xbFY1 [n|n #'vEH:`xb #vD4Y hi.i&EΖv#O H4IŶ}:Ikh @tZRF#(tXҙzZ ?I3l7q@õ|ۍ1,GpuY Ꮿ@hJv#xxk$ v#9 5 }_$c S#=+"K{F*m7`#%H:NRSp6I?sIՖ{Ap$I$I:QRv2$Z @UJ*$]<FO4IENDB`