How to use dontNeedSyscallDefine method of targets Package

Best Syzkaller code snippet using targets.dontNeedSyscallDefine

targets.go

Source:targets.go

...173			PtrSize:           8,174			PageSize:          4 << 10,175			CFlags:            []string{"-m64"},176			CrossCFlags:       []string{"-m64", "-static"},177			NeedSyscallDefine: dontNeedSyscallDefine,178			KernelHeaderArch:  "amd64",179		},180		"386": {181			VMArch:   "amd64",182			PtrSize:  4,183			PageSize: 4 << 10,184			CFlags:   []string{"-m32"},185			// The story behind -B/usr/lib32 is not completely clear, but it helps in some cases.186			// For context see discussion in https://github.com/google/syzkaller/pull/1202187			CrossCFlags:       []string{"-m32", "-static", "-B/usr/lib32"},188			NeedSyscallDefine: dontNeedSyscallDefine,189			KernelHeaderArch:  "amd64",190		},191		"mips64": {192			PtrSize:           8,193			PageSize:          4 << 10,194			CFlags:            []string{"-target amd64-unknown-freebsd"},195			NeedSyscallDefine: dontNeedSyscallDefine,196			CCompiler:         os.ExpandEnv("${CC}"),197			KernelHeaderArch:  "mips",198		},199	},200	"netbsd": {201		"amd64": {202			PtrSize:  8,203			PageSize: 4 << 10,204			CFlags:   []string{"-m64"},205			CrossCFlags: []string{"-m64", "-static",206				"--sysroot", os.ExpandEnv("${SOURCEDIR}/../dest/"),207			},208			CCompiler: os.ExpandEnv("${SOURCEDIR}/../tools/bin/x86_64--netbsd-g++"),209		},210	},211	"openbsd": {212		"amd64": {213			PtrSize:     8,214			PageSize:    4 << 10,215			CFlags:      []string{"-m64"},216			CCompiler:   "c++",217			CrossCFlags: []string{"-m64", "-static", "-lutil"},218			NeedSyscallDefine: func(nr uint64) bool {219				switch nr {220				case 8: // SYS___tfork221					return true222				case 94: // SYS___thrsleep223					return true224				case 198: // SYS___syscall225					return true226				case 295: // SYS___semctl227					return true228				case 301: // SYS___thrwakeup229					return true230				case 302: // SYS___threxit231					return true232				case 303: // SYS___thrsigdivert233					return true234				case 304: // SYS___getcwd235					return true236				case 329: // SYS___set_tcb237					return true238				case 330: // SYS___get_tcb239					return true240				}241				return false242			},243		},244	},245	"fuchsia": {246		"amd64": {247			PtrSize:          8,248			PageSize:         4 << 10,249			KernelHeaderArch: "x64",250			CCompiler:        os.ExpandEnv("${SOURCEDIR}/buildtools/linux-x64/clang/bin/clang++"),251			CrossCFlags: []string{252				"-Wno-deprecated",253				"--target=x86_64-fuchsia",254				"-lfdio",255				"-lzircon",256				"-ldriver",257				"--sysroot", os.ExpandEnv("${SOURCEDIR}/out/x64/sdk/exported/zircon_sysroot/arch/x64/sysroot"),258				"-I", os.ExpandEnv("${SOURCEDIR}/zircon/system/ulib/fdio/include"),259				"-I", os.ExpandEnv("${SOURCEDIR}/zircon/system/ulib/ddk/include"),260				"-L", os.ExpandEnv("${SOURCEDIR}/out/x64/gen/zircon/public/lib/driver"),261				"-L", os.ExpandEnv("${SOURCEDIR}/out/x64/gen/zircon/public/lib/fdio"),262			},263		},264		"arm64": {265			PtrSize:          8,266			PageSize:         4 << 10,267			KernelHeaderArch: "arm64",268			CCompiler:        os.ExpandEnv("${SOURCEDIR}/buildtools/linux-x64/clang/bin/clang++"),269			CrossCFlags: []string{270				"-Wno-deprecated",271				"--target=aarch64-fuchsia",272				"-lfdio",273				"-lzircon",274				"-ldriver",275				"--sysroot", os.ExpandEnv("${SOURCEDIR}/out/arm64/sdk/exported/zircon_sysroot/arch/arm64/sysroot"),276				"-I", os.ExpandEnv("${SOURCEDIR}/zircon/system/ulib/fdio/include"),277				"-I", os.ExpandEnv("${SOURCEDIR}/zircon/system/ulib/ddk/include"),278				"-L", os.ExpandEnv("${SOURCEDIR}/out/arm64/gen/zircon/public/lib/driver"),279				"-L", os.ExpandEnv("${SOURCEDIR}/out/arm64/gen/zircon/public/lib/fdio"),280			},281		},282	},283	"windows": {284		"amd64": {285			PtrSize: 8,286			// TODO(dvyukov): what should we do about 4k vs 64k?287			PageSize: 4 << 10,288		},289	},290	"akaros": {291		"amd64": {292			PtrSize:           8,293			PageSize:          4 << 10,294			KernelHeaderArch:  "x86",295			NeedSyscallDefine: dontNeedSyscallDefine,296			CCompiler:         os.ExpandEnv("${SOURCEDIR}/toolchain/x86_64-ucb-akaros-gcc/bin/x86_64-ucb-akaros-g++"),297			CrossCFlags: []string{298				"-static",299			},300		},301	},302	"trusty": {303		"arm": {304			PtrSize:           4,305			PageSize:          4 << 10,306			NeedSyscallDefine: dontNeedSyscallDefine,307		},308	},309}310var oses = map[string]osCommon{311	"linux": {312		SyscallNumbers:         true,313		SyscallPrefix:          "__NR_",314		ExecutorUsesShmem:      true,315		ExecutorUsesForkServer: true,316		KernelObject:           "vmlinux",317		CPP:                    "cpp",318	},319	"freebsd": {320		SyscallNumbers:         true,321		SyscallPrefix:          "SYS_",322		ExecutorUsesShmem:      true,323		ExecutorUsesForkServer: true,324		KernelObject:           "kernel.full",325		CPP:                    "g++",326	},327	"netbsd": {328		BuildOS:                "linux",329		SyscallNumbers:         true,330		SyscallPrefix:          "SYS_",331		ExecutorUsesShmem:      true,332		ExecutorUsesForkServer: true,333		KernelObject:           "netbsd.gdb",334		CPP:                    "cpp",335	},336	"openbsd": {337		SyscallNumbers:         true,338		SyscallPrefix:          "SYS_",339		ExecutorUsesShmem:      true,340		ExecutorUsesForkServer: true,341		KernelObject:           "bsd.gdb",342		CPP:                    "ecpp",343	},344	"fuchsia": {345		BuildOS:                "linux",346		SyscallNumbers:         false,347		ExecutorUsesShmem:      false,348		ExecutorUsesForkServer: false,349		KernelObject:           "zircon.elf",350		CPP:                    "cpp",351	},352	"windows": {353		SyscallNumbers:         false,354		ExecutorUsesShmem:      false,355		ExecutorUsesForkServer: false,356		ExeExtension:           ".exe",357		KernelObject:           "vmlinux",358		CPP:                    "cpp",359	},360	"akaros": {361		BuildOS:                "linux",362		SyscallNumbers:         true,363		SyscallPrefix:          "SYS_",364		ExecutorUsesShmem:      false,365		ExecutorUsesForkServer: true,366		KernelObject:           "akaros-kernel-64b",367		CPP:                    "cpp",368	},369	"trusty": {370		SyscallNumbers: true,371		SyscallPrefix:  "__NR_",372		CPP:            "cpp",373	},374}375var (376	commonCFlags = []string{377		"-O2",378		"-pthread",379		"-Wall",380		"-Werror",381		"-Wparentheses",382		"-Wunused-const-variable",383		"-Wframe-larger-than=8192",384	}385	optionalCFlags = map[string]bool{386		"-static":                 true, // some distributions don't have static libraries387		"-Wunused-const-variable": true, // gcc 5 does not support this flag388	}389)390func init() {391	for OS, archs := range List {392		for arch, target := range archs {393			initTarget(target, OS, arch)394		}395	}396	goos := runtime.GOOS397	if goos == "android" {398		goos = "linux"399	}400	for _, target := range List["test"] {401		target.CCompiler = List[goos][runtime.GOARCH].CCompiler402		target.CPP = List[goos][runtime.GOARCH].CPP403		target.BuildOS = goos404		if runtime.GOOS == "freebsd" && runtime.GOARCH == "amd64" && target.PtrSize == 4 {405			// -m32 alone does not work on freebsd with gcc.406			// TODO(dvyukov): consider switching to clang on freebsd instead.407			target.CFlags = append(target.CFlags, "-B/usr/lib32")408			target.CrossCFlags = append(target.CrossCFlags, "-B/usr/lib32")409		}410	}411}412func initTarget(target *Target, OS, arch string) {413	if common, ok := oses[OS]; ok {414		target.osCommon = common415	}416	target.OS = OS417	target.Arch = arch418	if target.NeedSyscallDefine == nil {419		target.NeedSyscallDefine = needSyscallDefine420	}421	target.DataOffset = 512 << 20422	target.NumPages = (16 << 20) / target.PageSize423	if OS == "linux" && arch == runtime.GOARCH {424		// Don't use cross-compiler for native compilation, there are cases when this does not work:425		// https://github.com/google/syzkaller/pull/619426		// https://github.com/google/syzkaller/issues/387427		// https://github.com/google/syzkaller/commit/06db3cec94c54e1cf720cdd5db72761514569d56428		target.CCompilerPrefix = ""429	}430	if target.CCompiler == "" {431		target.CCompiler = target.CCompilerPrefix + "gcc"432	}433	if target.BuildOS == "" {434		target.BuildOS = OS435	}436	if runtime.GOOS != target.BuildOS {437		// Spoil native binaries if they are not usable, so that nobody tries to use them later.438		target.CCompiler = fmt.Sprintf("cant-build-%v-on-%v", target.OS, runtime.GOOS)439		target.CPP = target.CCompiler440	}441	target.CrossCFlags = append(append([]string{}, commonCFlags...), target.CrossCFlags...)442}443func checkOptionalFlags(target *Target) {444	flags := make(map[string]*bool)445	var wg sync.WaitGroup446	for _, flag := range target.CrossCFlags {447		if !optionalCFlags[flag] {448			continue449		}450		res := new(bool)451		flags[flag] = res452		wg.Add(1)453		go func(flag string) {454			defer wg.Done()455			*res = checkFlagSupported(target, flag)456		}(flag)457	}458	wg.Wait()459	for i := 0; i < len(target.CrossCFlags); i++ {460		if res := flags[target.CrossCFlags[i]]; res != nil && !*res {461			copy(target.CrossCFlags[i:], target.CrossCFlags[i+1:])462			target.CrossCFlags = target.CrossCFlags[:len(target.CrossCFlags)-1]463			i--464		}465	}466}467func checkFlagSupported(target *Target, flag string) bool {468	cmd := exec.Command(target.CCompiler, "-x", "c", "-", "-o", "/dev/null", flag)469	cmd.Stdin = strings.NewReader("int main(){}")470	return cmd.Run() == nil471}472func needSyscallDefine(nr uint64) bool {473	return true474}475func dontNeedSyscallDefine(nr uint64) bool {476	return false477}...

dontNeedSyscallDefine

Using AI Code Generation

1func dontNeedSyscallDefine() {2    targets.dontNeedSyscallDefine()3}4func dontNeedSyscallDefine() {5    targets.dontNeedSyscallDefine()6}7func dontNeedSyscallDefine() {8    targets.dontNeedSyscallDefine()9}10func dontNeedSyscallDefine() {11    targets.dontNeedSyscallDefine()12}13func dontNeedSyscallDefine() {14    targets.dontNeedSyscallDefine()15}16func dontNeedSyscallDefine() {17    targets.dontNeedSyscallDefine()18}19func dontNeedSyscallDefine() {20    targets.dontNeedSyscallDefine()21}22func dontNeedSyscallDefine() {23    targets.dontNeedSyscallDefine()24}25func dontNeedSyscallDefine() {26    targets.dontNeedSyscallDefine()27}28func dontNeedSyscallDefine() {29    targets.dontNeedSyscallDefine()30}31func dontNeedSyscallDefine() {32    targets.dontNeedSyscallDefine()33}34func dontNeedSyscallDefine() {35    targets.dontNeedSyscallDefine()36}37func dontNeedSyscallDefine() {38    targets.dontNeedSyscallDefine()39}

dontNeedSyscallDefine

Using AI Code Generation

1func main() {2    t.DontNeedSyscallDefine()3}4func main() {5    t.DontNeedSyscallDefine()6}7func main() {8    t.DontNeedSyscallDefine()9}10func main() {11    t.DontNeedSyscallDefine()12}13func main() {14    t.DontNeedSyscallDefine()15}16func main() {17    t.DontNeedSyscallDefine()18}19func main() {20    t.DontNeedSyscallDefine()21}22func main() {23    t.DontNeedSyscallDefine()24}25func main() {26    t.DontNeedSyscallDefine()27}28func main() {29    t.DontNeedSyscallDefine()30}31func main() {32    t.DontNeedSyscallDefine()33}34func main() {35    t.DontNeedSyscallDefine()36}

dontNeedSyscallDefine

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello, playground")4}5import (6func main() {7	fmt.Println("Hello, playground")8}9import (10func main() {11	fmt.Println("Hello, playground")12}13import (14func main() {15	fmt.Println("Hello, playground")16}17import (18func main() {19	fmt.Println("Hello, playground")20}21import (22func main() {23	fmt.Println("Hello, playground")24}25import (26func main() {27	fmt.Println("Hello, playground")28}29import (30func main() {31	fmt.Println("Hello, playground")32}33import (34func main() {35	fmt.Println("Hello, playground")36}37import (38func main() {39	fmt.Println("Hello, playground")40}41import (42func main() {43	fmt.Println("Hello, playground")44}

dontNeedSyscallDefine

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello World!")4}5import (6func main() {7	fmt.Println("Hello World!")8}9import (10func main() {11	fmt.Println("Hello World!")12}13import (14func main() {15	fmt.Println("Hello World!")16}17import (18func main() {19	fmt.Println("Hello World!")20}21import (22func main() {23	fmt.Println("Hello World!")24}25import (26func main() {27	fmt.Println("Hello World!")28}29import (30func main() {31	fmt.Println("Hello World!")32}33import (34func main() {35	fmt.Println("Hello World!")36}37import (38func main() {39	fmt.Println("Hello World!")40}41import (42func main() {43	fmt.Println("Hello World!")44}

dontNeedSyscallDefine

Using AI Code Generation

1func main(){2targets := targets.New()3targets.DontNeedSyscallDefine()4}5func main(){6targets := targets.New()7targets.DontNeedSyscallDefine()8}9func main(){10targets := targets.New()11targets.DontNeedSyscallDefine()12}13func main(){14targets := targets.New()15targets.DontNeedSyscallDefine()16}17func main(){18targets := targets.New()19targets.DontNeedSyscallDefine()20}21func main(){22targets := targets.New()23targets.DontNeedSyscallDefine()24}25func main(){26targets := targets.New()27targets.DontNeedSyscallDefine()28}29func main(){30targets := targets.New()31targets.DontNeedSyscallDefine()32}33func main(){34targets := targets.New()35targets.DontNeedSyscallDefine()36}37func main(){38targets := targets.New()39targets.DontNeedSyscallDefine()40}41func main(){42targets := targets.New()43targets.DontNeedSyscallDefine()44}45func main(){46targets := targets.New()47targets.DontNeedSyscallDefine()48}49func main(){50targets := targets.New()51targets.DontNeedSyscallDefine()52}53func main(){

dontNeedSyscallDefine

Using AI Code Generation

1import "fmt"2import "syscall"3func main() {4    fmt.Println("Hello, playground")5    syscall.DontNeedSyscallDefine()6}7import "fmt"8import "syscall"9func main() {10    fmt.Println("Hello, playground")11    syscall.DontNeedSyscallDefine()12}13import "fmt"14import "syscall"15func main() {16    fmt.Println("Hello, playground")17    syscall.DontNeedSyscallDefine()18}19import "fmt"20import "syscall"21func main() {22    fmt.Println("Hello, playground")23    syscall.DontNeedSyscallDefine()24}25import "fmt"26import "syscall"27func main() {28    fmt.Println("Hello, playground")29    syscall.DontNeedSyscallDefine()30}31import "fmt"32import "syscall"33func main() {34    fmt.Println("Hello, playground")35    syscall.DontNeedSyscallDefine()36}37import "fmt"38import "syscall"39func main() {40    fmt.Println("Hello, playground")41    syscall.DontNeedSyscallDefine()42}43import "fmt"44import "syscall"45func main() {46    fmt.Println("Hello, playground")47    syscall.DontNeedSyscallDefine()48}49import "fmt"50import "syscall"51func main() {52    fmt.Println("Hello, playground")53    syscall.DontNeedSyscallDefine()54}55import "fmt"56import "syscall"

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