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cmd/compile: only support -race and -msan where they work
Consolidate decision about whether -race and -msan options are supported in cmd/internal/sys. Use consolidated functions in cmd/compile and cmd/go. Use a copy of them in cmd/dist; cmd/dist can't import cmd/internal/sys because Go 1.4 doesn't have it. Fixes #24315 Change-Id: I9cecaed4895eb1a2a49379b4848db40de66d32a9 Reviewed-on: https://go-review.googlesource.com/121816 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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@ -216,14 +216,18 @@ func Main(archInit func(*Arch)) {
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flag.StringVar(&linkobj, "linkobj", "", "write linker-specific object to `file`")
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objabi.Flagcount("live", "debug liveness analysis", &debuglive)
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objabi.Flagcount("m", "print optimization decisions", &Debug['m'])
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flag.BoolVar(&flag_msan, "msan", false, "build code compatible with C/C++ memory sanitizer")
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if sys.MSanSupported(objabi.GOOS, objabi.GOARCH) {
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flag.BoolVar(&flag_msan, "msan", false, "build code compatible with C/C++ memory sanitizer")
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}
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flag.BoolVar(&dolinkobj, "dolinkobj", true, "generate linker-specific objects; if false, some invalid code may compile")
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flag.BoolVar(&nolocalimports, "nolocalimports", false, "reject local (relative) imports")
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flag.StringVar(&outfile, "o", "", "write output to `file`")
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flag.StringVar(&myimportpath, "p", "", "set expected package import `path`")
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flag.BoolVar(&writearchive, "pack", false, "write to file.a instead of file.o")
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objabi.Flagcount("r", "debug generated wrappers", &Debug['r'])
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flag.BoolVar(&flag_race, "race", false, "enable race detector")
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if sys.RaceDetectorSupported(objabi.GOOS, objabi.GOARCH) {
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flag.BoolVar(&flag_race, "race", false, "enable race detector")
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}
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objabi.Flagcount("s", "warn about composite literals that can be simplified", &Debug['s'])
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flag.StringVar(&pathPrefix, "trimpath", "", "remove `prefix` from recorded source file paths")
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flag.BoolVar(&safemode, "u", false, "reject unsafe code")
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45
src/cmd/dist/test.go
vendored
45
src/cmd/dist/test.go
vendored
@ -705,7 +705,7 @@ func (t *tester) registerTests() {
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if gohostos == "linux" && goarch == "amd64" {
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t.registerTest("testasan", "../misc/cgo/testasan", "go", "run", "main.go")
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}
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if goos == "linux" && (goarch == "amd64" || goarch == "arm64") {
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if mSanSupported(goos, goarch) {
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t.registerHostTest("testsanitizers/msan", "../misc/cgo/testsanitizers", "misc/cgo/testsanitizers", ".")
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}
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if t.hasBash() && goos != "android" && !t.iOS() && gohostos != "windows" {
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@ -1329,13 +1329,21 @@ func (t *tester) hasSwig() bool {
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}
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func (t *tester) raceDetectorSupported() bool {
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switch gohostos {
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case "linux", "darwin", "freebsd", "windows":
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// The race detector doesn't work on Alpine Linux:
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// golang.org/issue/14481
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return t.cgoEnabled && (goarch == "amd64" || goarch == "ppc64le") && gohostos == goos && !isAlpineLinux()
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if gohostos != goos {
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return false
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}
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return false
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if !t.cgoEnabled {
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return false
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}
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if !raceDetectorSupported(goos, goarch) {
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return false
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}
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// The race detector doesn't work on Alpine Linux:
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// golang.org/issue/14481
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if isAlpineLinux() {
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return false
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}
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return true
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}
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func isAlpineLinux() bool {
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@ -1450,3 +1458,26 @@ func (t *tester) packageHasBenchmarks(pkg string) bool {
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}
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return false
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}
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// raceDetectorSupported is a copy of the function
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// cmd/internal/sys.RaceDetectorSupported, which can't be used here
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// because cmd/dist has to be buildable by Go 1.4.
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func raceDetectorSupported(goos, goarch string) bool {
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switch goos {
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case "linux", "darwin", "freebsd", "netbsd", "windows":
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return goarch == "amd64" || goarch == "ppc64le"
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default:
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return false
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}
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}
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// mSanSupported is a copy of the function cmd/internal/sys.MSanSupported,
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// which can't be used here because cmd/dist has to be buildable by Go 1.4.
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func mSanSupported(goos, goarch string) bool {
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switch goos {
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case "linux":
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return goarch == "amd64" || goarch == "arm64"
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default:
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return false
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}
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}
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@ -6,6 +6,7 @@ package main_test
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import (
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"bytes"
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"cmd/internal/sys"
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"debug/elf"
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"debug/macho"
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"flag"
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@ -209,15 +210,13 @@ func TestMain(m *testing.M) {
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}
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testGOCACHE = strings.TrimSpace(string(out))
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// As of Sept 2017, MSan is only supported on linux/amd64.
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// https://github.com/google/sanitizers/wiki/MemorySanitizer#getting-memorysanitizer
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canMSan = canCgo && runtime.GOOS == "linux" && runtime.GOARCH == "amd64"
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switch runtime.GOOS {
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case "linux", "darwin", "freebsd", "windows":
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// The race detector doesn't work on Alpine Linux:
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// golang.org/issue/14481
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canRace = canCgo && runtime.GOARCH == "amd64" && !isAlpineLinux() && runtime.Compiler != "gccgo"
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canMSan = canCgo && sys.MSanSupported(runtime.GOOS, runtime.GOARCH)
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canRace = canCgo && sys.RaceDetectorSupported(runtime.GOOS, runtime.GOARCH)
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// The race detector doesn't work on Alpine Linux:
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// golang.org/issue/14481
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// gccgo does not support the race detector.
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if isAlpineLinux() || runtime.Compiler == "gccgo" {
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canRace = false
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}
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}
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// Don't let these environment variables confuse the test.
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@ -10,6 +10,7 @@ import (
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"cmd/go/internal/base"
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"cmd/go/internal/cfg"
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"cmd/go/internal/load"
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"cmd/internal/sys"
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"flag"
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"fmt"
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"os"
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@ -42,18 +43,14 @@ func instrumentInit() {
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fmt.Fprintf(os.Stderr, "go %s: may not use -race and -msan simultaneously\n", flag.Args()[0])
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os.Exit(2)
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}
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if cfg.BuildMSan && (cfg.Goos != "linux" || cfg.Goarch != "amd64" && cfg.Goarch != "arm64") {
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if cfg.BuildMSan && !sys.MSanSupported(cfg.Goos, cfg.Goarch) {
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fmt.Fprintf(os.Stderr, "-msan is not supported on %s/%s\n", cfg.Goos, cfg.Goarch)
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os.Exit(2)
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}
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if cfg.BuildRace {
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platform := cfg.Goos + "/" + cfg.Goarch
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switch platform {
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default:
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if !sys.RaceDetectorSupported(cfg.Goos, cfg.Goarch) {
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fmt.Fprintf(os.Stderr, "go %s: -race is only supported on linux/amd64, linux/ppc64le, freebsd/amd64, netbsd/amd64, darwin/amd64 and windows/amd64\n", flag.Args()[0])
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os.Exit(2)
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case "linux/amd64", "linux/ppc64le", "freebsd/amd64", "netbsd/amd64", "darwin/amd64", "windows/amd64":
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// race supported on these platforms
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}
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}
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mode := "race"
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29
src/cmd/internal/sys/supported.go
Normal file
29
src/cmd/internal/sys/supported.go
Normal file
@ -0,0 +1,29 @@
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package sys
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// RaceDetectorSupported reports whether goos/goarch supports the race
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// detector. There is a copy of this function in cmd/dist/test.go.
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func RaceDetectorSupported(goos, goarch string) bool {
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switch goos {
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case "linux":
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return goarch == "amd64" || goarch == "ppc64le"
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case "darwin", "freebsd", "netbsd", "windows":
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return goarch == "amd64"
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default:
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return false
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}
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}
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// MSanSupported reports whether goos/goarch supports the memory
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// sanitizer option. There is a copy of this function in cmd/dist/test.go.
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func MSanSupported(goos, goarch string) bool {
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switch goos {
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case "linux":
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return goarch == "amd64" || goarch == "arm64"
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default:
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return false
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}
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}
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@ -1,4 +1,5 @@
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// errorcheck -0 -race
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// +build linux,amd64 linux,ppc64le darwin,amd64 freebsd,amd64 netbsd,amd64 windows,amd64
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// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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@ -1,4 +1,5 @@
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// errorcheck -0 -race
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// +build linux,amd64 linux,ppc64le darwin,amd64 freebsd,amd64 netbsd,amd64 windows,amd64
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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@ -1,4 +1,5 @@
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// errorcheck -0 -race
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// +build linux,amd64 linux,ppc64le darwin,amd64 freebsd,amd64 netbsd,amd64 windows,amd64
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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@ -1,4 +1,5 @@
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// errorcheck -0 -race
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// +build linux,amd64 linux,ppc64le darwin,amd64 freebsd,amd64 netbsd,amd64 windows,amd64
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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@ -1,4 +1,5 @@
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//errorcheck -0 -race -m -m
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// +build linux,amd64 linux,ppc64le darwin,amd64 freebsd,amd64 netbsd,amd64 windows,amd64
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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