pkg/csource: add function to parse serialized options

Also move options and options tests into a separate file,
add serialization function.

1 files changed, 131 insertions, 0 deletions

diff --git a/pkg/csource/options_test.go b/pkg/csource/options_test.go
new file mode 100644
index 000000000..f3f42a6fc
--- /dev/null
+++ b/pkg/csource/options_test.go
@@ -0,0 +1,131 @@
+// Copyright 2017 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package csource
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+)
+
+//{Threaded:true Collide:true Repeat:true Procs:1 Sandbox:none Fault:false FaultCall:-1 FaultNth:0 EnableTun:true UseTmpDir:true HandleSegv:true WaitRepeat:true Debug:false Repro:false}
+
+func TestParseOptions(t *testing.T) {
+	for _, opts := range allOptionsSingle() {
+		data := opts.Serialize()
+		got, err := DeserializeOptions(data)
+		if err != nil {
+			t.Fatalf("failed to deserialize %q: %v", data, err)
+		}
+		if !reflect.DeepEqual(got, opts) {
+			t.Fatalf("opts changed, got:\n%+v\nwant:\n%+v", got, opts)
+		}
+	}
+}
+
+func TestParseOptionsCanned(t *testing.T) {
+	// Dashboard stores csource options with syzkaller reproducers,
+	// so we need to be able to parse old formats.
+	canned := map[string]Options{
+		"{Threaded:true Collide:true Repeat:true Procs:1 Sandbox:none Fault:false FaultCall:-1 FaultNth:0 EnableTun:true UseTmpDir:true HandleSegv:true WaitRepeat:true Debug:false Repro:false}": Options{
+			Threaded:   true,
+			Collide:    true,
+			Repeat:     true,
+			Procs:      1,
+			Sandbox:    "none",
+			Fault:      false,
+			FaultCall:  -1,
+			FaultNth:   0,
+			EnableTun:  true,
+			UseTmpDir:  true,
+			HandleSegv: true,
+			WaitRepeat: true,
+			Debug:      false,
+			Repro:      false,
+		},
+		"{Threaded:true Collide:true Repeat:true Procs:1 Sandbox: Fault:false FaultCall:-1 FaultNth:0 EnableTun:true UseTmpDir:true HandleSegv:true WaitRepeat:true Debug:false Repro:false}": Options{
+			Threaded:   true,
+			Collide:    true,
+			Repeat:     true,
+			Procs:      1,
+			Sandbox:    "",
+			Fault:      false,
+			FaultCall:  -1,
+			FaultNth:   0,
+			EnableTun:  true,
+			UseTmpDir:  true,
+			HandleSegv: true,
+			WaitRepeat: true,
+			Debug:      false,
+			Repro:      false,
+		},
+	}
+	for data, want := range canned {
+		got, err := DeserializeOptions([]byte(data))
+		if err != nil {
+			t.Fatalf("failed to deserialize %q: %v", data, err)
+		}
+		if !reflect.DeepEqual(got, want) {
+			t.Fatalf("deserialize %q\ngot:\n%+v\nwant:\n%+v", data, got, want)
+		}
+	}
+}
+
+func allOptionsSingle() []Options {
+	var opts []Options
+	fields := reflect.TypeOf(Options{}).NumField()
+	for i := 0; i < fields; i++ {
+		opts = append(opts, enumerateField(Options{}, i)...)
+	}
+	return opts
+}
+
+func allOptionsPermutations() []Options {
+	opts := []Options{Options{}}
+	fields := reflect.TypeOf(Options{}).NumField()
+	for i := 0; i < fields; i++ {
+		var newOpts []Options
+		for _, opt := range opts {
+			newOpts = append(newOpts, enumerateField(opt, i)...)
+		}
+		opts = newOpts
+	}
+	return opts
+}
+
+func enumerateField(opt Options, field int) []Options {
+	var opts []Options
+	s := reflect.ValueOf(&opt).Elem()
+	fldName := s.Type().Field(field).Name
+	fld := s.Field(field)
+	if fldName == "Sandbox" {
+		for _, sandbox := range []string{"", "none", "setuid", "namespace"} {
+			fld.SetString(sandbox)
+			opts = append(opts, opt)
+		}
+	} else if fldName == "Procs" {
+		for _, procs := range []int64{1, 4} {
+			fld.SetInt(procs)
+			opts = append(opts, opt)
+		}
+	} else if fldName == "FaultCall" {
+		opts = append(opts, opt)
+	} else if fldName == "FaultNth" {
+		opts = append(opts, opt)
+	} else if fld.Kind() == reflect.Bool {
+		for _, v := range []bool{false, true} {
+			fld.SetBool(v)
+			opts = append(opts, opt)
+		}
+	} else {
+		panic(fmt.Sprintf("field '%v' is not boolean", fldName))
+	}
+	var checked []Options
+	for _, opt := range opts {
+		if err := opt.Check(); err == nil {
+			checked = append(checked, opt)
+		}
+	}
+	return checked
+}