sys/targets: add OS/Arch name consts

We use strings to identify OS/Arch.
These strings are duplicated throughout the code base massively.
golangci-lint points to possiblity of typos and duplication.
We already had to define these names in pkg/csource
and disable checking for prog package. A future change triggers
such warnings in another package.

Add OS/Arch name consts to sys/targets so that they can be used
to refer to OS/Arch. Use the consts everywhere.

4 files changed, 22 insertions, 19 deletions

diff --git a/pkg/build/build.go b/pkg/build/build.go
index 149d8729c..9931ce0ea 100644
--- a/pkg/build/build.go
+++ b/pkg/build/build.go
@@ -16,6 +16,7 @@ import (
 	"github.com/google/syzkaller/pkg/osutil"
 	"github.com/google/syzkaller/pkg/report"
 	"github.com/google/syzkaller/pkg/vcs"
+	"github.com/google/syzkaller/sys/targets"
 )
 
 // Params is input arguments for the Image function.
@@ -118,17 +119,17 @@ func getBuilder(targetOS, targetArch, vmType string) (builder, error) {
 		vms  []string
 		b    builder
 	}{
-		{"linux", "amd64", []string{"gvisor"}, gvisor{}},
-		{"linux", "amd64", []string{"gce", "qemu"}, linux{}},
-		{"linux", "ppc64le", []string{"qemu"}, linux{}},
-		{"linux", "s390x", []string{"qemu"}, linux{}},
-		{"fuchsia", "amd64", []string{"qemu"}, fuchsia{}},
-		{"fuchsia", "arm64", []string{"qemu"}, fuchsia{}},
-		{"akaros", "amd64", []string{"qemu"}, akaros{}},
-		{"openbsd", "amd64", []string{"gce", "vmm"}, openbsd{}},
-		{"netbsd", "amd64", []string{"gce", "qemu"}, netbsd{}},
-		{"freebsd", "amd64", []string{"gce", "qemu"}, freebsd{}},
-		{"test", "64", []string{"qemu"}, test{}},
+		{targets.Linux, targets.AMD64, []string{"gvisor"}, gvisor{}},
+		{targets.Linux, targets.AMD64, []string{"gce", "qemu"}, linux{}},
+		{targets.Linux, targets.PPC64LE, []string{"qemu"}, linux{}},
+		{targets.Linux, targets.S390x, []string{"qemu"}, linux{}},
+		{targets.Fuchsia, targets.AMD64, []string{"qemu"}, fuchsia{}},
+		{targets.Fuchsia, targets.ARM64, []string{"qemu"}, fuchsia{}},
+		{targets.Akaros, targets.AMD64, []string{"qemu"}, akaros{}},
+		{targets.OpenBSD, targets.AMD64, []string{"gce", "vmm"}, openbsd{}},
+		{targets.NetBSD, targets.AMD64, []string{"gce", "qemu"}, netbsd{}},
+		{targets.FreeBSD, targets.AMD64, []string{"gce", "qemu"}, freebsd{}},
+		{targets.TestOS, targets.TestArch64, []string{"qemu"}, test{}},
 	}
 	for _, s := range supported {
 		if targetOS == s.OS && targetArch == s.arch {
@@ -193,7 +194,7 @@ func extractRootCause(err error, OS, kernelSrc string) error {
 		Output:     verr.Output,
 		guiltyFile: file,
 	}
-	if file != "" && OS == "linux" {
+	if file != "" && OS == targets.Linux {
 		maintainers, err := report.GetLinuxMaintainers(kernelSrc, file)
 		if err != nil {
 			kernelErr.Output = append(kernelErr.Output, err.Error()...)
diff --git a/pkg/build/fuchsia.go b/pkg/build/fuchsia.go
index f4bb2c8b4..ea1e2dccb 100644
--- a/pkg/build/fuchsia.go
+++ b/pkg/build/fuchsia.go
@@ -33,7 +33,7 @@ func (fu fuchsia) build(params *Params) error {
 		return err
 	}
 
-	sysTarget := targets.Get("fuchsia", params.TargetArch)
+	sysTarget := targets.Get(targets.Fuchsia, params.TargetArch)
 	if sysTarget == nil {
 		return fmt.Errorf("unsupported fuchsia arch %v", params.TargetArch)
 	}
diff --git a/pkg/build/linux.go b/pkg/build/linux.go
index 36f18b84f..7566eca21 100644
--- a/pkg/build/linux.go
+++ b/pkg/build/linux.go
@@ -18,6 +18,7 @@ import (
 	"time"
 
 	"github.com/google/syzkaller/pkg/osutil"
+	"github.com/google/syzkaller/sys/targets"
 )
 
 type linux struct{}
@@ -57,9 +58,9 @@ func (linux linux) buildKernel(params *Params) error {
 	// We build only zImage/bzImage as we currently don't use modules.
 	var target string
 	switch params.TargetArch {
-	case "386", "amd64", "s390x":
+	case targets.I386, targets.AMD64, targets.S390x:
 		target = "bzImage"
-	case "ppc64le":
+	case targets.PPC64LE:
 		target = "zImage"
 	}
 
@@ -110,11 +111,11 @@ func (linux) createImage(params *Params) error {
 
 	var kernelImage string
 	switch params.TargetArch {
-	case "386", "amd64":
+	case targets.I386, targets.AMD64:
 		kernelImage = "arch/x86/boot/bzImage"
-	case "ppc64le":
+	case targets.PPC64LE:
 		kernelImage = "arch/powerpc/boot/zImage.pseries"
-	case "s390x":
+	case targets.S390x:
 		kernelImage = "arch/s390/boot/bzImage"
 	}
 	kernelImagePath := filepath.Join(params.KernelDir, filepath.FromSlash(kernelImage))
diff --git a/pkg/build/netbsd.go b/pkg/build/netbsd.go
index 43620c9cf..e0f4bcea0 100644
--- a/pkg/build/netbsd.go
+++ b/pkg/build/netbsd.go
@@ -16,6 +16,7 @@ import (
 	"github.com/google/syzkaller/pkg/mgrconfig"
 	"github.com/google/syzkaller/pkg/osutil"
 	"github.com/google/syzkaller/pkg/report"
+	"github.com/google/syzkaller/sys/targets"
 	"github.com/google/syzkaller/vm"
 )
 
@@ -104,7 +105,7 @@ func (ctx netbsd) copyKernelToDisk(targetArch, vmType, outputDir, kernel string)
 		Image:        filepath.Join(outputDir, "image"),
 		SSHKey:       filepath.Join(outputDir, "key"),
 		SSHUser:      "root",
-		TargetOS:     "netbsd",
+		TargetOS:     targets.NetBSD,
 		TargetArch:   targetArch,
 		TargetVMArch: targetArch,
 		Type:         "qemu",