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// Copyright 2024 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 vminfo
import (
"context"
"os"
"path/filepath"
"runtime"
"strings"
"testing"
"time"
"github.com/google/syzkaller/pkg/flatrpc"
"github.com/google/syzkaller/pkg/fuzzer/queue"
"github.com/google/syzkaller/prog"
_ "github.com/google/syzkaller/sys"
"github.com/google/syzkaller/sys/targets"
)
func TestHostMachineInfo(t *testing.T) {
checker, files := hostChecker(t)
dups := make(map[string]bool)
for _, file := range files {
if file.Name[0] != '/' || file.Name[len(file.Name)-1] == '/' || strings.Contains(file.Name, "\\") {
t.Errorf("malformed file %q", file.Name)
}
// Reading duplicate files leads to duplicate work.
if dups[file.Name] {
t.Errorf("duplicate file %q", file.Name)
}
dups[file.Name] = true
if file.Error != "" {
t.Logf("failed to read %q: %s", file.Name, file.Error)
}
}
modules, info, err := checker.MachineInfo(files)
if err != nil {
t.Fatal(err)
}
t.Logf("machine info:\n%s", info)
for _, module := range modules {
t.Logf("module %q: addr 0x%x size %v", module.Name, module.Addr, module.Size)
}
}
func TestSyscalls(t *testing.T) {
t.Parallel()
for _, arches := range targets.List {
for _, target := range arches {
if target.OS == targets.Linux {
continue // linux has own TestLinuxSyscalls test
}
t.Run(target.OS+"/"+target.Arch, func(t *testing.T) {
t.Parallel()
cfg := testConfig(t, target.OS, target.Arch)
checker := New(cfg)
stop := make(chan struct{})
go createSuccessfulResults(checker, stop)
enabled, disabled, _, err := checker.Run(context.Background(), nil, allFeatures())
close(stop)
if err != nil {
t.Fatal(err)
}
for call, reason := range disabled {
t.Errorf("disabled call %v: %v", call.Name, reason)
}
if len(enabled) != len(cfg.Syscalls) {
t.Errorf("enabled only %v calls out of %v", len(enabled), len(cfg.Syscalls))
}
})
}
}
}
func allFeatures() []*flatrpc.FeatureInfo {
var features []*flatrpc.FeatureInfo
for feat := range flatrpc.EnumNamesFeature {
features = append(features, &flatrpc.FeatureInfo{
Id: feat,
})
}
return features
}
func createSuccessfulResults(source queue.Source, stop chan struct{}) {
var count int
for {
select {
case <-stop:
return
case <-time.After(time.Millisecond):
}
req := source.Next()
if req == nil {
continue
}
count++
if count > 1000 {
// This is just a sanity check that we don't do something stupid accidentally.
// If it grows above the limit intentionally, the limit can be increased.
// Currently we have 641 (when we failed to properly dedup syscall tests, it was 4349).
panic("too many test programs")
}
res := &queue.Result{
Status: queue.Success,
}
switch req.Type {
case flatrpc.RequestTypeProgram:
res.Info = &flatrpc.ProgInfo{}
for range req.Prog.Calls {
res.Info.Calls = append(res.Info.Calls, &flatrpc.CallInfo{
Cover: []uint64{1},
Signal: []uint64{1},
Comps: []*flatrpc.Comparison{{Op1: 1, Op2: 2}},
})
}
case flatrpc.RequestTypeGlob:
res.Output = []byte("/some/file\n")
}
req.Done(res)
}
}
func hostChecker(t *testing.T) (*Checker, []*flatrpc.FileInfo) {
cfg := testConfig(t, runtime.GOOS, runtime.GOARCH)
checker := New(cfg)
files := readFiles(checker.RequiredFiles())
return checker, files
}
func testConfig(t *testing.T, OS, arch string) *Config {
target, err := prog.GetTarget(OS, arch)
if err != nil {
t.Fatal(err)
}
var syscalls []int
for id := range target.Syscalls {
if !target.Syscalls[id].Attrs.Disabled {
syscalls = append(syscalls, id)
}
}
return &Config{
Target: target,
Features: flatrpc.AllFeatures,
Sandbox: flatrpc.ExecEnvSandboxNone,
Syscalls: syscalls,
}
}
func readFiles(files []string) []*flatrpc.FileInfo {
var res []*flatrpc.FileInfo
for _, glob := range files {
glob = filepath.FromSlash(glob)
if !strings.Contains(glob, "*") {
res = append(res, readFile(glob))
continue
}
matches, err := filepath.Glob(glob)
if err != nil {
res = append(res, &flatrpc.FileInfo{
Name: glob,
Error: err.Error(),
})
continue
}
for _, file := range matches {
res = append(res, readFile(file))
}
}
return res
}
func readFile(file string) *flatrpc.FileInfo {
data, err := os.ReadFile(file)
exists, errStr := true, ""
if err != nil {
exists, errStr = !os.IsNotExist(err), err.Error()
}
return &flatrpc.FileInfo{
Name: file,
Exists: exists,
Error: errStr,
Data: data,
}
}
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