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// Copyright 2015 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"
"io/ioutil"
"math/rand"
"os"
"os/exec"
"path/filepath"
"regexp"
"runtime"
"strings"
"testing"
"time"
"github.com/google/syzkaller/pkg/osutil"
"github.com/google/syzkaller/prog"
_ "github.com/google/syzkaller/sys"
"github.com/google/syzkaller/sys/targets"
)
func TestGenerate(t *testing.T) {
t.Parallel()
checked := make(map[string]bool)
for _, target := range prog.AllTargets() {
target := target
sysTarget := targets.Get(target.OS, target.Arch)
if runtime.GOOS != sysTarget.BuildOS {
continue
}
t.Run(target.OS+"/"+target.Arch, func(t *testing.T) {
if target.OS == "linux" && target.Arch == "arm64" {
// Episodically fails on travis with:
// collect2: error: ld terminated with signal 11 [Segmentation fault]
t.Skip("broken")
}
if target.OS == "test" && target.PtrSize == 4 {
// The same reason as linux/32.
t.Skip("broken")
}
if _, err := exec.LookPath(sysTarget.CCompiler); err != nil {
t.Skipf("no target compiler %v", sysTarget.CCompiler)
}
bin, err := Build(target, []byte(`
#include <stdio.h>
int main() { printf("Hello, World!\n"); }
`))
if err != nil {
t.Skipf("target compiler is broken: %v", err)
}
os.Remove(bin)
full := !checked[target.OS]
checked[target.OS] = true
t.Parallel()
testTarget(t, target, full)
})
}
}
// This is the main configuration used by executor, so we want to test it as well.
var executorOpts = Options{
Threaded: true,
Collide: true,
Repeat: true,
Procs: 2,
Sandbox: "none",
Repro: true,
UseTmpDir: true,
}
func testTarget(t *testing.T, target *prog.Target, full bool) {
seed := time.Now().UnixNano()
if os.Getenv("TRAVIS") != "" {
seed = 0 // required for deterministic coverage reports
}
rs := rand.NewSource(seed)
t.Logf("seed=%v", seed)
p := target.Generate(rs, 10, nil)
// Turns out that fully minimized program can trigger new interesting warnings,
// e.g. about NULL arguments for functions that require non-NULL arguments in syz_ functions.
// We could append both AllSyzProg as-is and a minimized version of it,
// but this makes the NULL argument warnings go away (they showed up in ".constprop" versions).
// Testing 2 programs takes too long since we have lots of options permutations and OS/arch.
// So we use the as-is in short tests and minimized version in full tests.
syzProg := target.GenerateAllSyzProg(rs)
var opts []Options
if !full || testing.Short() {
p.Calls = append(p.Calls, syzProg.Calls...)
opts = allOptionsSingle(target.OS)
opts = append(opts, executorOpts)
} else {
minimized, _ := prog.Minimize(syzProg, -1, false, func(p *prog.Prog, call int) bool {
return len(p.Calls) == len(syzProg.Calls)
})
p.Calls = append(p.Calls, minimized.Calls...)
opts = allOptionsPermutations(target.OS)
}
for opti, opts := range opts {
opts := opts
t.Run(fmt.Sprintf("%v", opti), func(t *testing.T) {
t.Parallel()
testOne(t, p, opts)
})
}
}
func testOne(t *testing.T, p *prog.Prog, opts Options) {
src, err := Write(p, opts)
if err != nil {
t.Logf("opts: %+v\nprogram:\n%s\n", opts, p.Serialize())
t.Fatalf("%v", err)
}
bin, err := Build(p.Target, src)
if err != nil {
t.Logf("opts: %+v\nprogram:\n%s\n", opts, p.Serialize())
t.Fatalf("%v", err)
}
defer os.Remove(bin)
}
func TestSysTests(t *testing.T) {
t.Parallel()
for _, target := range prog.AllTargets() {
target := target
sysTarget := targets.Get(target.OS, target.Arch)
if runtime.GOOS != sysTarget.BuildOS {
continue // we need at least preprocessor binary to generate sources
}
t.Run(target.OS+"/"+target.Arch, func(t *testing.T) {
t.Parallel()
dir := filepath.Join("..", "..", "sys", target.OS, "test")
if !osutil.IsExist(dir) {
return
}
files, err := ioutil.ReadDir(dir)
if err != nil {
t.Fatalf("failed to read %v: %v", dir, err)
}
for _, finfo := range files {
file := filepath.Join(dir, finfo.Name())
if strings.HasSuffix(file, "~") || strings.HasSuffix(file, ".swp") {
continue
}
data, err := ioutil.ReadFile(file)
if err != nil {
t.Fatalf("failed to read %v: %v", file, err)
}
p, err := target.Deserialize(data, prog.Strict)
if err != nil {
t.Fatalf("failed to parse program %v: %v", file, err)
}
_, err = Write(p, executorOpts)
if err != nil {
t.Fatalf("failed to generate C source for %v: %v", file, err)
}
}
})
}
}
func TestExecutorMacros(t *testing.T) {
// Ensure that executor does not mis-spell any of the SYZ_* macros.
target, _ := prog.GetTarget("test", "64")
p := target.Generate(rand.NewSource(0), 1, nil)
expected := commonDefines(p, Options{})
expected["SYZ_EXECUTOR"] = true
expected["SYZ_HAVE_SETUP_LOOP"] = true
expected["SYZ_HAVE_RESET_LOOP"] = true
expected["SYZ_HAVE_SETUP_TEST"] = true
macros := regexp.MustCompile("SYZ_[A-Za-z0-9_]+").FindAllString(commonHeader, -1)
for _, macro := range macros {
if strings.HasPrefix(macro, "SYZ_HAVE_") {
continue
}
if _, ok := expected[macro]; !ok {
t.Errorf("unexpected macro: %v", macro)
}
}
}
func TestExecutorMistakes(t *testing.T) {
mistakes := map[string][]string{
// We strip debug() calls from the resulting C source,
// this breaks the following pattern. Use {} around debug() to fix.
"\\)\n\\t*(debug|debug_dump_data)\\(": {
`
if (foo)
debug("foo failed");
`, `
if (x + y)
debug_dump_data(data, len);
`,
},
}
for pattern, tests := range mistakes {
re := regexp.MustCompile(pattern)
for _, test := range tests {
if !re.MatchString(test) {
t.Errorf("patter %q does not match test %q", pattern, test)
}
}
for _, match := range re.FindAllStringIndex(commonHeader, -1) {
start, end := match[0], match[1]
for start != 0 && commonHeader[start] != '\n' {
start--
}
for end != len(commonHeader) && commonHeader[end] != '\n' {
end++
}
t.Errorf("pattern %q matches executor source:\n%v",
pattern, commonHeader[start:end])
}
}
}
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