How to use postProcess method of csource Package

Best Syzkaller code snippet using csource.postProcess

csource.go

Source:csource.go

...76		return nil, err77	}78	const header = "// autogenerated by syzkaller (https://github.com/google/syzkaller)\n\n"79	result = append([]byte(header), result...)80	result = ctx.postProcess(result)81	return result, nil82}83type context struct {84	p         *prog.Prog85	opts      Options86	target    *prog.Target87	sysTarget *targets.Target88	calls     map[string]uint64 // CallName -> NR89}90func (ctx *context) generateSyscalls(calls []string, hasVars bool) string {91	opts := ctx.opts92	buf := new(bytes.Buffer)93	if !opts.Threaded && !opts.Collide {94		if hasVars || opts.Trace {95			fmt.Fprintf(buf, "\tintptr_t res = 0;\n")96		}97		if opts.Repro {98			fmt.Fprintf(buf, "\tif (write(1, \"executing program\\n\", sizeof(\"executing program\\n\") - 1)) {}\n")99		}100		if opts.Trace {101			fmt.Fprintf(buf, "\tfprintf(stderr, \"### start\\n\");\n")102		}103		for _, c := range calls {104			fmt.Fprintf(buf, "%s", c)105		}106	} else {107		if hasVars || opts.Trace {108			fmt.Fprintf(buf, "\tintptr_t res = 0;\n")109		}110		fmt.Fprintf(buf, "\tswitch (call) {\n")111		for i, c := range calls {112			fmt.Fprintf(buf, "\tcase %v:\n", i)113			fmt.Fprintf(buf, "%s", strings.Replace(c, "\t", "\t\t", -1))114			fmt.Fprintf(buf, "\t\tbreak;\n")115		}116		fmt.Fprintf(buf, "\t}\n")117	}118	return buf.String()119}120func (ctx *context) generateSyscallDefines() string {121	var calls []string122	for name, nr := range ctx.calls {123		if !ctx.sysTarget.SyscallNumbers ||124			strings.HasPrefix(name, "syz_") || !ctx.sysTarget.NeedSyscallDefine(nr) {125			continue126		}127		calls = append(calls, name)128	}129	sort.Strings(calls)130	buf := new(bytes.Buffer)131	prefix := ctx.sysTarget.SyscallPrefix132	for _, name := range calls {133		fmt.Fprintf(buf, "#ifndef %v%v\n", prefix, name)134		fmt.Fprintf(buf, "#define %v%v %v\n", prefix, name, ctx.calls[name])135		fmt.Fprintf(buf, "#endif\n")136	}137	if ctx.target.OS == "linux" && ctx.target.PtrSize == 4 {138		// This is a dirty hack.139		// On 32-bit linux mmap translated to old_mmap syscall which has a different signature.140		// mmap2 has the right signature. syz-extract translates mmap to mmap2, do the same here.141		fmt.Fprintf(buf, "#undef __NR_mmap\n")142		fmt.Fprintf(buf, "#define __NR_mmap __NR_mmap2\n")143	}144	return buf.String()145}146func (ctx *context) generateProgCalls(p *prog.Prog, trace bool) ([]string, []uint64, error) {147	exec := make([]byte, prog.ExecBufferSize)148	progSize, err := p.SerializeForExec(exec)149	if err != nil {150		return nil, nil, fmt.Errorf("failed to serialize program: %v", err)151	}152	decoded, err := ctx.target.DeserializeExec(exec[:progSize])153	if err != nil {154		return nil, nil, err155	}156	calls, vars := ctx.generateCalls(decoded, trace)157	return calls, vars, nil158}159func (ctx *context) generateCalls(p prog.ExecProg, trace bool) ([]string, []uint64) {160	var calls []string161	csumSeq := 0162	for ci, call := range p.Calls {163		w := new(bytes.Buffer)164		// Copyin.165		for _, copyin := range call.Copyin {166			ctx.copyin(w, &csumSeq, copyin)167		}168		if ctx.opts.Fault && ctx.opts.FaultCall == ci {169			fmt.Fprintf(w, "\tinject_fault(%v);\n", ctx.opts.FaultNth)170		}171		// Call itself.172		callName := call.Meta.CallName173		resCopyout := call.Index != prog.ExecNoCopyout174		argCopyout := len(call.Copyout) != 0175		emitCall := ctx.opts.NetInjection ||176			callName != "syz_emit_ethernet" &&177				callName != "syz_extract_tcp_res"178		// TODO: if we don't emit the call we must also not emit copyin, copyout and fault injection.179		// However, simply skipping whole iteration breaks tests due to unused static functions.180		if emitCall {181			ctx.emitCall(w, call, ci, resCopyout || argCopyout, trace)182		} else if trace {183			fmt.Fprintf(w, "\t(void)res;\n")184		}185		// Copyout.186		if resCopyout || argCopyout {187			ctx.copyout(w, call, resCopyout)188		}189		calls = append(calls, w.String())190	}191	return calls, p.Vars192}193func (ctx *context) emitCall(w *bytes.Buffer, call prog.ExecCall, ci int, haveCopyout, trace bool) {194	callName := call.Meta.CallName195	native := ctx.sysTarget.SyscallNumbers && !strings.HasPrefix(callName, "syz_")196	fmt.Fprintf(w, "\t")197	if haveCopyout || trace {198		fmt.Fprintf(w, "res = ")199	}200	ctx.emitCallName(w, call, native)201	for ai, arg := range call.Args {202		if native || ai > 0 {203			fmt.Fprintf(w, ", ")204		}205		switch arg := arg.(type) {206		case prog.ExecArgConst:207			if arg.Format != prog.FormatNative && arg.Format != prog.FormatBigEndian {208				panic("sring format in syscall argument")209			}210			fmt.Fprintf(w, "%v", ctx.constArgToStr(arg, true, native))211		case prog.ExecArgResult:212			if arg.Format != prog.FormatNative && arg.Format != prog.FormatBigEndian {213				panic("sring format in syscall argument")214			}215			val := ctx.resultArgToStr(arg)216			if native && ctx.target.PtrSize == 4 {217				// syscall accepts args as ellipsis, resources are uint64218				// and take 2 slots without the cast, which would be wrong.219				val = "(intptr_t)" + val220			}221			fmt.Fprintf(w, "%v", val)222		default:223			panic(fmt.Sprintf("unknown arg type: %+v", arg))224		}225	}226	for i := 0; i < call.Meta.MissingArgs; i++ {227		if native || len(call.Args) != 0 {228			fmt.Fprintf(w, ", ")229		}230		fmt.Fprintf(w, "0")231	}232	fmt.Fprintf(w, ");")233	comment := ctx.target.AnnotateCall(call)234	if len(comment) != 0 {235		fmt.Fprintf(w, " /* %s */", comment)236	}237	fmt.Fprintf(w, "\n")238	if trace {239		cast := ""240		if !native && !strings.HasPrefix(callName, "syz_") {241			// Potentially we casted a function returning int to a function returning intptr_t.242			// So instead of intptr_t -1 we can get 0x00000000ffffffff. Sign extend it to intptr_t.243			cast = "(intptr_t)(int)"244		}245		fmt.Fprintf(w, "\tfprintf(stderr, \"### call=%v errno=%%u\\n\", %vres == -1 ? errno : 0);\n", ci, cast)246	}247}248func (ctx *context) emitCallName(w *bytes.Buffer, call prog.ExecCall, native bool) {249	callName := call.Meta.CallName250	if native {251		fmt.Fprintf(w, "syscall(%v%v", ctx.sysTarget.SyscallPrefix, callName)252	} else if strings.HasPrefix(callName, "syz_") {253		fmt.Fprintf(w, "%v(", callName)254	} else {255		args := strings.Repeat(",intptr_t", len(call.Args))256		if args != "" {257			args = args[1:]258		}259		fmt.Fprintf(w, "((intptr_t(*)(%v))CAST(%v))(", args, callName)260	}261}262func (ctx *context) generateCsumInet(w *bytes.Buffer, addr uint64, arg prog.ExecArgCsum, csumSeq int) {263	fmt.Fprintf(w, "\tstruct csum_inet csum_%d;\n", csumSeq)264	fmt.Fprintf(w, "\tcsum_inet_init(&csum_%d);\n", csumSeq)265	for i, chunk := range arg.Chunks {266		switch chunk.Kind {267		case prog.ExecArgCsumChunkData:268			fmt.Fprintf(w, "\tNONFAILING(csum_inet_update(&csum_%d, (const uint8*)0x%x, %d));\n",269				csumSeq, chunk.Value, chunk.Size)270		case prog.ExecArgCsumChunkConst:271			fmt.Fprintf(w, "\tuint%d csum_%d_chunk_%d = 0x%x;\n",272				chunk.Size*8, csumSeq, i, chunk.Value)273			fmt.Fprintf(w, "\tcsum_inet_update(&csum_%d, (const uint8*)&csum_%d_chunk_%d, %d);\n",274				csumSeq, csumSeq, i, chunk.Size)275		default:276			panic(fmt.Sprintf("unknown checksum chunk kind %v", chunk.Kind))277		}278	}279	fmt.Fprintf(w, "\tNONFAILING(*(uint16*)0x%x = csum_inet_digest(&csum_%d));\n",280		addr, csumSeq)281}282func (ctx *context) copyin(w *bytes.Buffer, csumSeq *int, copyin prog.ExecCopyin) {283	switch arg := copyin.Arg.(type) {284	case prog.ExecArgConst:285		if arg.BitfieldOffset == 0 && arg.BitfieldLength == 0 {286			ctx.copyinVal(w, copyin.Addr, arg.Size, ctx.constArgToStr(arg, true, false), arg.Format)287		} else {288			if arg.Format != prog.FormatNative && arg.Format != prog.FormatBigEndian {289				panic("bitfield+string format")290			}291			htobe := ""292			if arg.Format == prog.FormatBigEndian {293				htobe = fmt.Sprintf("htobe%v", arg.Size*8)294			}295			fmt.Fprintf(w, "\tNONFAILING(STORE_BY_BITMASK(uint%v, %v, 0x%x, %v, %v, %v));\n",296				arg.Size*8, htobe, copyin.Addr, ctx.constArgToStr(arg, false, false),297				arg.BitfieldOffset, arg.BitfieldLength)298		}299	case prog.ExecArgResult:300		ctx.copyinVal(w, copyin.Addr, arg.Size, ctx.resultArgToStr(arg), arg.Format)301	case prog.ExecArgData:302		fmt.Fprintf(w, "\tNONFAILING(memcpy((void*)0x%x, \"%s\", %v));\n",303			copyin.Addr, toCString(arg.Data, arg.Readable), len(arg.Data))304	case prog.ExecArgCsum:305		switch arg.Kind {306		case prog.ExecArgCsumInet:307			*csumSeq++308			ctx.generateCsumInet(w, copyin.Addr, arg, *csumSeq)309		default:310			panic(fmt.Sprintf("unknown csum kind %v", arg.Kind))311		}312	default:313		panic(fmt.Sprintf("bad argument type: %+v", arg))314	}315}316func (ctx *context) copyinVal(w *bytes.Buffer, addr, size uint64, val string, bf prog.BinaryFormat) {317	switch bf {318	case prog.FormatNative, prog.FormatBigEndian:319		fmt.Fprintf(w, "\tNONFAILING(*(uint%v*)0x%x = %v);\n", size*8, addr, val)320	case prog.FormatStrDec:321		if size != 20 {322			panic("bad strdec size")323		}324		fmt.Fprintf(w, "\tNONFAILING(sprintf((char*)0x%x, \"%%020llu\", (long long)%v));\n", addr, val)325	case prog.FormatStrHex:326		if size != 18 {327			panic("bad strdec size")328		}329		fmt.Fprintf(w, "\tNONFAILING(sprintf((char*)0x%x, \"0x%%016llx\", (long long)%v));\n", addr, val)330	case prog.FormatStrOct:331		if size != 23 {332			panic("bad strdec size")333		}334		fmt.Fprintf(w, "\tNONFAILING(sprintf((char*)0x%x, \"%%023llo\", (long long)%v));\n", addr, val)335	default:336		panic("unknown binary format")337	}338}339func (ctx *context) copyout(w *bytes.Buffer, call prog.ExecCall, resCopyout bool) {340	if ctx.sysTarget.OS == "fuchsia" {341		// On fuchsia we have real system calls that return ZX_OK on success,342		// and libc calls that are casted to function returning intptr_t,343		// as the result int -1 is returned as 0x00000000ffffffff rather than full -1.344		if strings.HasPrefix(call.Meta.CallName, "zx_") {345			fmt.Fprintf(w, "\tif (res == ZX_OK)")346		} else {347			fmt.Fprintf(w, "\tif ((int)res != -1)")348		}349	} else {350		fmt.Fprintf(w, "\tif (res != -1)")351	}352	copyoutMultiple := len(call.Copyout) > 1 || resCopyout && len(call.Copyout) > 0353	if copyoutMultiple {354		fmt.Fprintf(w, " {")355	}356	fmt.Fprintf(w, "\n")357	if resCopyout {358		fmt.Fprintf(w, "\t\tr[%v] = res;\n", call.Index)359	}360	for _, copyout := range call.Copyout {361		fmt.Fprintf(w, "\t\tNONFAILING(r[%v] = *(uint%v*)0x%x);\n",362			copyout.Index, copyout.Size*8, copyout.Addr)363	}364	if copyoutMultiple {365		fmt.Fprintf(w, "\t}\n")366	}367}368func (ctx *context) constArgToStr(arg prog.ExecArgConst, handleBigEndian, native bool) string {369	mask := (uint64(1) << (arg.Size * 8)) - 1370	v := arg.Value & mask371	val := fmt.Sprintf("%v", v)372	if v == ^uint64(0)&mask {373		val = "-1"374	} else if v >= 10 {375		val = fmt.Sprintf("0x%x", v)376	}377	if native && arg.Size == 8 {378		// syscall() is variadic, so constant arguments must be explicitly379		// promoted.  Otherwise the compiler is free to leave garbage in the380		// upper 32 bits of the argument value.  In practice this can happen381		// on amd64 with arguments that are passed on the stack, i.e.,382		// arguments beyond the first six.  For example, on freebsd/amd64,383		// syscall(SYS_mmap, ..., 0) causes clang to emit a 32-bit store of384		// 0 to the stack, but the kernel expects a 64-bit value.385		//386		// syzkaller's argument type representations do not always match387		// the OS ABI.  For instance, "flags" is always 64 bits wide on 64-bit388		// platforms, but is a 32-bit value ("unsigned int" or so) in many389		// cases.  Thus, we assume here that passing a 64-bit argument where390		// a 32-bit argument is expected won't break anything.  On amd64391		// this should be fine: arguments are passed in 64-bit registers or392		// at 64 bit-aligned addresses on the stack.393		if ctx.target.PtrSize == 4 {394			val += "ull"395		} else {396			val += "ul"397		}398	}399	if ctx.opts.Procs > 1 && arg.PidStride != 0 {400		val += fmt.Sprintf(" + procid*%v", arg.PidStride)401	}402	if handleBigEndian && arg.Format == prog.FormatBigEndian {403		val = fmt.Sprintf("htobe%v(%v)", arg.Size*8, val)404	}405	return val406}407func (ctx *context) resultArgToStr(arg prog.ExecArgResult) string {408	res := fmt.Sprintf("r[%v]", arg.Index)409	if arg.DivOp != 0 {410		res = fmt.Sprintf("%v/%v", res, arg.DivOp)411	}412	if arg.AddOp != 0 {413		res = fmt.Sprintf("%v+%v", res, arg.AddOp)414	}415	if arg.Format == prog.FormatBigEndian {416		res = fmt.Sprintf("htobe%v(%v)", arg.Size*8, res)417	}418	return res419}420func (ctx *context) postProcess(result []byte) []byte {421	// Remove NONFAILING, debug, fail, etc calls.422	if !ctx.opts.HandleSegv {423		result = regexp.MustCompile(`\t*NONFAILING\((.*)\);\n`).ReplaceAll(result, []byte("$1;\n"))424	}425	result = bytes.Replace(result, []byte("NORETURN"), nil, -1)426	result = bytes.Replace(result, []byte("doexit("), []byte("exit("), -1)427	result = regexp.MustCompile(`PRINTF\(.*?\)`).ReplaceAll(result, nil)428	result = regexp.MustCompile(`\t*debug\((.*\n)*?.*\);\n`).ReplaceAll(result, nil)429	result = regexp.MustCompile(`\t*debug_dump_data\((.*\n)*?.*\);\n`).ReplaceAll(result, nil)430	result = regexp.MustCompile(`\t*exitf\((.*\n)*?.*\);\n`).ReplaceAll(result, []byte("\texit(1);\n"))431	result = regexp.MustCompile(`\t*fail\((.*\n)*?.*\);\n`).ReplaceAll(result, []byte("\texit(1);\n"))432	result = ctx.hoistIncludes(result)433	result = ctx.removeEmptyLines(result)434	return result...

postProcess

Using AI Code Generation

1import (2func main() {3	csource := NewCSource()4	csource.AddRune('A')5	csource.AddRune('B')6	csource.AddRune('C')7	csource.AddRune('D')8	csource.AddRune('E')9	csource.AddRune('F')10	csource.AddRune('G')11	csource.AddRune('H')12	csource.AddRune('I')13	csource.AddRune('J')14	csource.AddRune('K')15	csource.AddRune('L')16	csource.AddRune('M')17	csource.AddRune('N')18	csource.AddRune('O')19	csource.AddRune('P')20	csource.AddRune('Q')21	csource.AddRune('R')22	csource.AddRune('S')23	csource.AddRune('T')24	csource.AddRune('U')25	csource.AddRune('V')26	csource.AddRune('W')27	csource.AddRune('X')28	csource.AddRune('Y')29	csource.AddRune('Z')30	csource.AddRune('\n')31	csource.AddRune('a')32	csource.AddRune('b')33	csource.AddRune('c')34	csource.AddRune('d')35	csource.AddRune('e')36	csource.AddRune('f')37	csource.AddRune('g')38	csource.AddRune('h')39	csource.AddRune('i')40	csource.AddRune('j')41	csource.AddRune('k')42	csource.AddRune('l')43	csource.AddRune('m')44	csource.AddRune('n')45	csource.AddRune('o')46	csource.AddRune('p')47	csource.AddRune('q')48	csource.AddRune('r')49	csource.AddRune('s')50	csource.AddRune('t')51	csource.AddRune('u')52	csource.AddRune('v')53	csource.AddRune('w')54	csource.AddRune('x')55	csource.AddRune('y')56	csource.AddRune('z')57	csource.AddRune('\n')58	csource.AddRune('0')59	csource.AddRune('1')60	csource.AddRune('2')61	csource.AddRune('3')

postProcess

Using AI Code Generation

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

postProcess

Using AI Code Generation

1import (2func main() {3    c := csource.New()4    c.PostProcessFunc = func(s string) string {5    }6    err := c.Compile()7    if err != nil {8        fmt.Println(err)9    }10    fmt.Println(c.OutputFile)11}12import (13func main() {14    c := csource.New()15    err := c.Compile()16    if err != nil {17        fmt.Println(err)18    }19    fmt.Println(c.OutputFile)20}21import (22func main() {23    c := csource.New()24    c.CompilerArgs = []string{"-O2"}25    err := c.Compile()26    if err != nil {27        fmt.Println(err)28    }29    fmt.Println(c.OutputFile)30}

postProcess

Using AI Code Generation

1import (2func main() {3	csrc.Set("name", "deviceQuery")4	csrc.Set("file", "deviceQuery.cu")5	csrc.Set("arch", "sm_61")6	csrc.Set("ptx", "deviceQuery.ptx")7	csrc.Set("bin", "deviceQuery.bin")8	csrc.Set("cubin", "deviceQuery.cubin")9	csrc.Set("compiler", "nvcc")10	csrc.Set("compilerOptions", "-O3")11	csrc.Set("linker", "nvcc")12	csrc.Set("linkerOptions", "-O3")13	csrc.Set("linkerLibs", "")14	csrc.Set("linkerLibPaths", "")15	csrc.Set("linkerRPaths", "")16	csrc.Set("linkerDefines", "")17	csrc.Set("linkerUndefines", "")18	csrc.Set("linkerIncludes", "")19	csrc.Set("linkerCudaLibs", "")20	csrc.Set("linkerCudaLibPaths", "")21	csrc.Set("linkerCudaRPaths", "")22	csrc.Set("linkerCudaDefines", "")23	csrc.Set("linkerCudaUndefines", "")24	csrc.Set("linkerCudaIncludes", "")25	csrc.Set("linkerCudaOptions", "")26	csrc.Set("linkerCudaDeviceLibs", "")27	csrc.Set("linkerCudaDeviceLibPaths", "")28	csrc.Set("linkerCudaDeviceRPaths", "")29	csrc.Set("linkerCudaDeviceDefines", "")30	csrc.Set("linkerCudaDeviceUndefines", "")31	csrc.Set("linkerCudaDeviceIncludes", "")32	csrc.Set("linkerCudaDeviceOptions", "")33	csrc.Set("linkerCudaFatbin", "")34	csrc.Set("linkerCudaFatbinOptions", "")35	csrc.Set("linkerCudaFatbinArchs", "")36	csrc.Set("linkerCudaFatbinCode", "")37	csrc.Set("linkerCudaFatbinCodeOptions", "")38	csrc.Set("linkerCudaFatbinCodeArchs", "")39	csrc.Set("linkerCudaFatbinDeviceCode", "")40	csrc.Set("linker

postProcess

Using AI Code Generation

1import (2func main() {3	fmt.Printf(stringutil.PostProcess("hello, world\n"))4}5import (6func main() {7	fmt.Printf(stringutil.PostProcess("hello, world\n"))8}9import (10func main() {11	fmt.Printf(stringutil.PostProcess("hello, world\n"))12}13import (14func main() {15	fmt.Printf(stringutil.PostProcess("hello, world\n"))16}17import (18func main() {19	fmt.Printf(stringutil.PostProcess("hello, world\n"))20}21import (22func main() {23	fmt.Printf(stringutil.PostProcess("hello, world\n"))24}25import (26func main() {27	fmt.Printf(stringutil.PostProcess("hello, world\n"))28}29import (30func main() {31	fmt.Printf(stringutil.PostProcess("hello, world\n"))32}33import (34func main()

postProcess

Using AI Code Generation

1using namespace std;2#define REP(i,n) for(int i=0;i<(n);++i)3#define REPD(i,n) for(int i=(n)-1;i>=0;--i)4#define FOR(i,a,b) for(int i=(a);i<(b);++i)5#define FORD(i,a,b) for(int i=(a)-1;i>=(b);--i)6#define FOREACH(it,c) for(__typeof((c).begin()) it=(c).begin();it!=(c).end();++it)7#define ALL(c) (c).begin(), (c).end()8#define SIZE(x) ((int)(x).size())9#define FILL(x,v) memset(x, v, sizeof(x))10typedef long long LL;11typedef unsigned long long ULL;12typedef vector<int> VI;13typedef vector<VI> VVI;14typedef vector<string> VS;15typedef pair<int, int> PII;16template <typename T> ostream& operator<<(ostream& os, const vector<T>& v) {17    copy(v.begin(), v.end(), ostream_iterator<T>(cout, " "));18    return os;19}20template <typename T> istream& operator>>(istream& is, vector<T>& v) {21    copy(v.begin(), v.end(), istream_iterator<T>(is));22    return is;23}24class csource {25        csource();26        csource(string);27        void postProcess();28        void print();29        void printToFile(string);30        vector<string> code;31        vector<string> funcNames;32        vector<string> funcArgs;33        vector<string> funcTypes;34        vector<string> varNames;

postProcess

Using AI Code Generation

1import "fmt"2import "github.com/01-edu/z01"3func main() {4	csource.postProcess(path, path2)5	fmt.Println("File created")6}7import "fmt"8import "github.com/01-edu/z01"9func main() {10	csource.preProcess(path, path2)11	fmt.Println("File created")12}13import "fmt"14import "github.com/01-edu/z01"15func main() {16	csource.preProcess(path, path2)17	fmt.Println("File created")18}19import "fmt"20import "github.com/01-edu/z01"21func main() {22	csource.postProcess(path, path2)23	fmt.Println("File created")24}25import "fmt"26import "github.com/01-edu/z01"27func main() {28	csource.postProcess(path, path2)29	fmt.Println("File

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