regression test failed on rooted android/arm

[benshi001]

"ALL TESTS PASSED" on android/arm64 and non rooted android/arm. But there are failures on rooted android/arm.

SPREADTRUM\ben.shi@tj07598pcu:~/Desktop/go/src$ CC_FOR_TARGET=~/android/ndk-standalone-r17b/arm/bin/arm-linux-androideabi-gcc GOARCH=arm GOARM=7 ./androidtest.bash 
Building Go cmd/dist using /usr/lib/go-1.6.
Building Go toolchain1 using /usr/lib/go-1.6.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
Building Go toolchain3 using go_bootstrap and Go toolchain2.
Building packages and commands for host, linux/amd64.
Building packages and commands for target, android/arm.
# Syncing test files to android device

real	0m24.585s
user	0m0.016s
sys	0m0.156s
4282 KB/s (2740335 bytes in 0.624s)
2018/08/30 08:35:08 removing /data/local/tmp/goroot/pkg/android_arm64


##### Testing packages.
ok  	archive/tar	1.848s
ok  	archive/zip	6.697s
ok  	bufio	1.650s
ok  	bytes	2.957s
ok  	compress/bzip2	1.205s
ok  	compress/flate	3.725s
ok  	compress/gzip	1.614s
ok  	compress/lzw	1.464s
ok  	compress/zlib	1.175s
ok  	container/heap	1.130s
ok  	container/list	1.247s
ok  	container/ring	1.242s
ok  	context	2.140s
ok  	crypto	1.188s
ok  	crypto/aes	1.185s
ok  	crypto/cipher	1.245s
ok  	crypto/des	1.216s
ok  	crypto/dsa	1.144s
ok  	crypto/ecdsa	1.816s
ok  	crypto/elliptic	1.620s
ok  	crypto/hmac	1.467s
ok  	crypto/internal/subtle	1.450s
ok  	crypto/md5	1.609s
ok  	crypto/rand	1.754s
ok  	crypto/rc4	1.624s
ok  	crypto/rsa	1.977s
ok  	crypto/sha1	1.316s
ok  	crypto/sha256	1.522s
ok  	crypto/sha512	1.537s
ok  	crypto/subtle	1.471s
ok  	crypto/tls	4.609s
ok  	crypto/x509	3.736s
ok  	database/sql	2.216s
ok  	database/sql/driver	1.147s
ok  	debug/dwarf	1.233s
ok  	debug/elf	1.171s
ok  	debug/gosym	1.147s
ok  	debug/macho	0.981s
ok  	debug/pe	1.529s
ok  	debug/plan9obj	1.198s
ok  	encoding/ascii85	1.194s
ok  	encoding/asn1	1.135s
ok  	encoding/base32	1.248s
ok  	encoding/base64	1.215s
ok  	encoding/binary	1.178s
ok  	encoding/csv	1.135s
ok  	encoding/gob	1.743s
ok  	encoding/hex	0.986s
ok  	encoding/json	3.844s
ok  	encoding/pem	1.792s
ok  	encoding/xml	1.746s
ok  	errors	1.337s
ok  	expvar	1.818s
ok  	flag	1.152s
ok  	fmt	1.473s
ok  	go/ast	1.502s
ok  	go/build	1.858s
ok  	go/constant	1.396s
ok  	go/doc	1.644s
ok  	go/format	1.350s
ok  	go/importer	2.019s
ok  	go/internal/gccgoimporter	1.440s
ok  	go/internal/gcimporter	2.125s
ok  	go/internal/srcimporter	4.026s
ok  	go/parser	1.508s
ok  	go/printer	2.369s
ok  	go/scanner	1.030s
ok  	go/token	1.371s
ok  	go/types	2.790s
ok  	hash	1.256s
ok  	hash/adler32	1.142s
ok  	hash/crc32	1.641s
ok  	hash/crc64	1.557s
ok  	hash/fnv	1.588s
ok  	html	1.110s
ok  	html/template	1.883s
ok  	image	1.779s
ok  	image/color	1.592s
ok  	image/draw	1.631s
ok  	image/gif	2.845s
ok  	image/jpeg	2.072s
ok  	image/png	1.717s
ok  	index/suffixarray	1.537s
ok  	internal/cpu	1.237s
ok  	internal/poll	1.258s
ok  	internal/singleflight	1.061s
ok  	internal/trace	4.499s
ok  	io	1.323s
ok  	io/ioutil	1.167s
ok  	log	1.184s
ok  	log/syslog	2.576s
ok  	math	1.268s
ok  	math/big	7.910s
ok  	math/bits	1.412s
ok  	math/cmplx	1.344s
ok  	math/rand	1.725s
ok  	mime	1.054s
ok  	mime/multipart	2.419s
ok  	mime/quotedprintable	1.334s
ok  	net	4.544s
ok  	net/http	10.546s
ok  	net/http/cgi	1.856s
ok  	net/http/cookiejar	2.373s
ok  	net/http/fcgi	2.279s
ok  	net/http/httptest	2.337s
ok  	net/http/httptrace	2.237s
ok  	net/http/httputil	2.430s
ok  	net/http/internal	1.183s
ok  	net/http/pprof	5.216s
ok  	net/internal/socktest	1.682s
ok  	net/mail	1.957s
ok  	net/rpc	2.946s
ok  	net/rpc/jsonrpc	2.686s
ok  	net/smtp	1.847s
ok  	net/textproto	1.292s
ok  	net/url	1.367s
ok  	os	2.725s
ok  	os/exec	3.911s
ok  	os/signal	4.587s
ok  	os/user	1.644s
ok  	path	0.962s
ok  	path/filepath	1.031s
ok  	reflect	3.556s
ok  	regexp	1.488s
ok  	regexp/syntax	2.186s
ok  	runtime	9.202s
ok  	runtime/debug	1.245s
ok  	runtime/internal/atomic	2.850s
ok  	runtime/internal/sys	1.439s
ok  	runtime/pprof	7.792s
ok  	runtime/pprof/internal/profile	1.359s
ok  	runtime/trace	4.427s
ok  	sort	1.482s
ok  	strconv	2.472s
ok  	strings	2.348s
ok  	sync	2.097s
ok  	sync/atomic	1.352s
go_android_exec: adb shell mkdir -p /data/local/tmp/syscall.test-13657
go_android_exec: adb push /tmp/go-build542677525/b979/syscall.test /data/local/tmp/syscall.test-13657/syscall.test-13657-tmp
3622 KB/s (2838542 bytes in 0.765s)
go_android_exec: adb shell cp '/data/local/tmp/syscall.test-13657/syscall.test-13657-tmp' '/data/local/tmp/syscall.test-13657/syscall.test-13657'
go_android_exec: adb shell rm '/data/local/tmp/syscall.test-13657/syscall.test-13657-tmp'
go_android_exec: adb shell export TMPDIR="/data/local/tmp/syscall.test-13657"; export GOROOT="/data/local/tmp/goroot"; export GOPATH="/data/local/tmp/gopath"; cd "/data/local/tmp/goroot/src/syscall"; '/data/local/tmp/syscall.test-13657/syscall.test-13657' -test.short=true -test.timeout=18m0s; echo -n exitcode=$?
--- FAIL: TestSyscallNoError (0.05s)
    syscall_linux_test.go:358: expected 4294967295 / 2 / 4294967294, got 0 / 0 / 0
FAIL
exitcode=1go_android_exec: adb shell rm -rf /data/local/tmp/syscall.test-13657
FAIL	syscall	1.698s
ok  	testing	2.132s
ok  	testing/quick	1.495s
ok  	text/scanner	1.171s
ok  	text/tabwriter	1.083s
ok  	text/template	2.028s
ok  	text/template/parse	1.393s
ok  	time	4.813s
ok  	unicode	1.002s
ok  	unicode/utf16	1.281s
ok  	unicode/utf8	1.355s
ok  	vendor/golang_org/x/crypto/chacha20poly1305	1.890s
ok  	vendor/golang_org/x/crypto/cryptobyte	1.113s
ok  	vendor/golang_org/x/crypto/curve25519	1.324s
ok  	vendor/golang_org/x/crypto/internal/chacha20	1.235s
ok  	vendor/golang_org/x/crypto/poly1305	1.110s
ok  	vendor/golang_org/x/net/dns/dnsmessage	1.522s
ok  	vendor/golang_org/x/net/http/httpguts	1.194s
ok  	vendor/golang_org/x/net/http/httpproxy	1.308s
ok  	vendor/golang_org/x/net/http2/hpack	1.211s
ok  	vendor/golang_org/x/net/idna	1.411s
ok  	vendor/golang_org/x/net/nettest	2.436s
ok  	vendor/golang_org/x/text/transform	1.372s
ok  	vendor/golang_org/x/text/unicode/norm	0.977s
ok  	cmd/addr2line	1.434s
ok  	cmd/api	1.832s
ok  	cmd/asm/internal/asm	4.156s
ok  	cmd/asm/internal/lex	1.317s
ok  	cmd/compile	2.896s
ok  	cmd/compile/internal/gc	3.462s
ok  	cmd/compile/internal/ssa	7.209s
ok  	cmd/compile/internal/syntax	1.371s
ok  	cmd/compile/internal/test	1.182s [no tests to run]
ok  	cmd/compile/internal/types	1.237s
ok  	cmd/cover	1.653s
ok  	cmd/doc	1.612s
ok  	cmd/fix	1.513s
ok  	cmd/go	3.766s
ok  	cmd/go/internal/cache	2.194s
ok  	cmd/go/internal/dirhash	1.476s
ok  	cmd/go/internal/generate	3.302s
ok  	cmd/go/internal/get	3.163s
ok  	cmd/go/internal/imports	1.782s
ok  	cmd/go/internal/load	2.303s
ok  	cmd/go/internal/modconv	5.113s
ok  	cmd/go/internal/modfetch	4.865s
ok  	cmd/go/internal/modfetch/codehost	2.551s
ok  	cmd/go/internal/modfile	1.120s
ok  	cmd/go/internal/modload	4.184s
ok  	cmd/go/internal/module	1.296s
ok  	cmd/go/internal/mvs	2.047s
ok  	cmd/go/internal/par	1.625s
ok  	cmd/go/internal/search	1.698s
ok  	cmd/go/internal/semver	1.433s
ok  	cmd/go/internal/txtar	1.369s
ok  	cmd/go/internal/web2	2.703s
ok  	cmd/go/internal/work	2.089s
ok  	cmd/gofmt	1.885s
ok  	cmd/internal/buildid	2.396s
ok  	cmd/internal/dwarf	1.213s
ok  	cmd/internal/edit	1.178s
ok  	cmd/internal/goobj	1.191s
ok  	cmd/internal/obj	1.117s
ok  	cmd/internal/obj/arm64	1.405s
ok  	cmd/internal/obj/x86	1.643s
ok  	cmd/internal/objabi	1.460s
ok  	cmd/internal/src	1.346s
ok  	cmd/internal/test2json	1.443s
ok  	cmd/link	1.580s
ok  	cmd/link/internal/ld	2.142s
ok  	cmd/link/internal/sym	1.225s
ok  	cmd/nm	2.157s
ok  	cmd/objdump	2.169s
ok  	cmd/pack	1.613s
ok  	cmd/trace	3.881s
ok  	cmd/vendor/github.com/google/pprof/internal/binutils	2.986s
ok  	cmd/vendor/github.com/google/pprof/internal/driver	4.956s
ok  	cmd/vendor/github.com/google/pprof/internal/elfexec	1.589s
ok  	cmd/vendor/github.com/google/pprof/internal/graph	1.621s
ok  	cmd/vendor/github.com/google/pprof/internal/measurement	1.408s
ok  	cmd/vendor/github.com/google/pprof/internal/report	3.724s
ok  	cmd/vendor/github.com/google/pprof/internal/symbolizer	3.166s
ok  	cmd/vendor/github.com/google/pprof/internal/symbolz	2.805s
ok  	cmd/vendor/github.com/google/pprof/profile	1.954s
ok  	cmd/vendor/github.com/ianlancetaylor/demangle	1.560s
ok  	cmd/vendor/golang.org/x/arch/arm/armasm	1.591s
ok  	cmd/vendor/golang.org/x/arch/arm64/arm64asm	1.798s
ok  	cmd/vendor/golang.org/x/arch/ppc64/ppc64asm	1.355s
ok  	cmd/vendor/golang.org/x/arch/x86/x86asm	1.650s
ok  	cmd/vendor/golang.org/x/crypto/ssh/terminal	1.263s
ok  	cmd/vendor/golang.org/x/sys/unix	1.618s
ok  	cmd/vet	2.148s
ok  	cmd/vet/internal/cfg	1.312s
2018/08/30 16:38:14 Failed: exit status 1

[benshi001]

This is a bug of the syscall geteuid, with the following test program.

#include <unistd.h>
#include <sys/types.h>
#include <stdio.h>
int main()
{
	printf("%d\n", geteuid());
	return 0;
}

I did

1. build it with android NDK r16b, then a.out generated
2. root my phone, and push it /data/local/tmp
3. chown other:other a.out
4. chmod a+s a.out
5. run a.out
6. still got 0 printed

I can not find a formal link about this android issue. But the above result is true on my rooted nexus5/android 8.1/

[gopherbot]

Change https://golang.org/cl/132175 mentions this issue: syscall: skip an inproper on rooted android/arm