How to use setErr method of prog Package

Best Syzkaller code snippet using prog.setErr

dump.go

Source:dump.go

...36	Read, Write, Exec bool37	Filename string38	Offset   uint6439}40func (state *DumpState) setErr(err error) {41	if err == nil {42		return43	}44	state.Mutex.Lock()45	if state.Err == nil {46		state.Err = err47	}48	state.Mutex.Unlock()49}50func (state *DumpState) setThreadsTotal(n int) {51	state.Mutex.Lock()52	state.ThreadsTotal = n53	state.ThreadsDone = 054	state.Mutex.Unlock()55}56func (state *DumpState) threadDone() {57	state.Mutex.Lock()58	state.ThreadsDone++59	state.Mutex.Unlock()60}61func (state *DumpState) setMemTotal(n uint64) {62	state.Mutex.Lock()63	state.MemTotal = n64	state.Mutex.Unlock()65}66func (state *DumpState) memDone(delta uint64) {67	state.Mutex.Lock()68	state.MemDone += delta69	state.Mutex.Unlock()70}71func (state *DumpState) isCanceled() bool {72	state.Mutex.Lock()73	defer state.Mutex.Unlock()74	return state.Canceled75}76// Dump writes a core dump to out. State is updated as the core dump is written.77func (t *Target) Dump(out elfwriter.WriteCloserSeeker, flags DumpFlags, state *DumpState) {78	defer func() {79		state.Mutex.Lock()80		if ierr := recover(); ierr != nil {81			state.Err = newInternalError(ierr, 2)82		}83		err := out.Close()84		if state.Err == nil && err != nil {85			state.Err = fmt.Errorf("error writing output file: %v", err)86		}87		state.Dumping = false88		state.Mutex.Unlock()89		if state.DoneChan != nil {90			close(state.DoneChan)91		}92	}()93	bi := t.BinInfo()94	var fhdr elf.FileHeader95	fhdr.Class = elf.ELFCLASS6496	fhdr.Data = elf.ELFDATA2LSB97	fhdr.Version = elf.EV_CURRENT98	switch bi.GOOS {99	case "linux":100		fhdr.OSABI = elf.ELFOSABI_LINUX101	case "freebsd":102		fhdr.OSABI = elf.ELFOSABI_FREEBSD103	default:104		// There is no OSABI value for windows or macOS because nobody generates ELF core dumps on those systems.105		fhdr.OSABI = 0xff106	}107	fhdr.Type = elf.ET_CORE108	switch bi.Arch.Name {109	case "amd64":110		fhdr.Machine = elf.EM_X86_64111	case "386":112		fhdr.Machine = elf.EM_386113	case "arm64":114		fhdr.Machine = elf.EM_AARCH64115	default:116		panic("not implemented")117	}118	fhdr.Entry = 0119	w := elfwriter.New(out, &fhdr)120	notes := []elfwriter.Note{}121	entryPoint, err := t.EntryPoint()122	if err != nil {123		state.setErr(err)124		return125	}126	notes = append(notes, elfwriter.Note{127		Type: elfwriter.DelveHeaderNoteType,128		Name: "Delve Header",129		Data: []byte(fmt.Sprintf("%s/%s\n%s\n%s%d\n%s%#x\n", bi.GOOS, bi.Arch.Name, version.DelveVersion.String(), elfwriter.DelveHeaderTargetPidPrefix, t.Pid(), elfwriter.DelveHeaderEntryPointPrefix, entryPoint)),130	})131	threads := t.ThreadList()132	state.setThreadsTotal(len(threads))133	var threadsDone bool134	if flags&DumpPlatformIndependent == 0 {135		threadsDone, notes, err = t.proc.DumpProcessNotes(notes, state.threadDone)136		if err != nil {137			state.setErr(err)138			return139		}140	}141	if !threadsDone {142		for _, th := range threads {143			if w.Err != nil {144				state.setErr(fmt.Errorf("error writing to output file: %v", w.Err))145				return146			}147			if state.isCanceled() {148				return149			}150			notes = t.dumpThreadNotes(notes, state, th)151			state.threadDone()152		}153	}154	memmap, err := t.proc.MemoryMap()155	if err != nil {156		state.setErr(err)157		return158	}159	memmapFilter := make([]MemoryMapEntry, 0, len(memmap))160	memtot := uint64(0)161	for i := range memmap {162		mme := &memmap[i]163		if t.shouldDumpMemory(mme) {164			memmapFilter = append(memmapFilter, *mme)165			memtot += mme.Size166		}167	}168	state.setMemTotal(memtot)169	for i := range memmapFilter {170		mme := &memmapFilter[i]171		if w.Err != nil {172			state.setErr(fmt.Errorf("error writing to output file: %v", w.Err))173			return174		}175		if state.isCanceled() {176			return177		}178		t.dumpMemory(state, w, mme)179	}180	notesProg := w.WriteNotes(notes)181	w.Progs = append(w.Progs, notesProg)182	w.WriteProgramHeaders()183	if w.Err != nil {184		state.setErr(fmt.Errorf("error writing to output file: %v", w.Err))185	}186	state.Mutex.Lock()187	state.AllDone = true188	state.Mutex.Unlock()189}190// dumpThreadNotes appends notes describing a thread (thread id and its191// registers) using a platform-independent format.192func (t *Target) dumpThreadNotes(notes []elfwriter.Note, state *DumpState, th Thread) []elfwriter.Note {193	// If the backend doesn't provide a way to dump a thread we use a custom format for the note:194	// - thread_id (8 bytes)195	// - pc value (8 bytes)196	// - sp value (8 bytes)197	// - bp value (8 bytes)198	// - tls value (8 bytes)199	// - has_gaddr (1 byte)200	// - gaddr value (8 bytes)201	// - num_registers (4 bytes)202	// Followed by a list of num_register, each as follows:203	// - register_name_len (2 bytes)204	// - register_name (register_name_len bytes)205	// - register_data_len (2 bytes)206	// - register_data (regiter_data_len bytes)207	buf := new(bytes.Buffer)208	_ = binary.Write(buf, binary.LittleEndian, uint64(th.ThreadID()))209	regs, err := th.Registers()210	if err != nil {211		state.setErr(err)212		return notes213	}214	for _, specialReg := range []uint64{regs.PC(), regs.SP(), regs.BP(), regs.TLS()} {215		binary.Write(buf, binary.LittleEndian, specialReg)216	}217	gaddr, hasGaddr := regs.GAddr()218	binary.Write(buf, binary.LittleEndian, hasGaddr)219	binary.Write(buf, binary.LittleEndian, gaddr)220	regsv, err := regs.Slice(true)221	if err != nil {222		state.setErr(err)223		return notes224	}225	binary.Write(buf, binary.LittleEndian, uint32(len(regsv)))226	for _, reg := range regsv {227		binary.Write(buf, binary.LittleEndian, uint16(len(reg.Name)))228		buf.Write([]byte(reg.Name))229		if reg.Reg.Bytes != nil {230			binary.Write(buf, binary.LittleEndian, uint16(len(reg.Reg.Bytes)))231			buf.Write(reg.Reg.Bytes)232		} else {233			binary.Write(buf, binary.LittleEndian, uint16(8))234			binary.Write(buf, binary.LittleEndian, reg.Reg.Uint64Val)235		}236	}237	return append(notes, elfwriter.Note{238		Type: elfwriter.DelveThreadNodeType,239		Name: "",240		Data: buf.Bytes(),241	})242}243func (t *Target) dumpMemory(state *DumpState, w *elfwriter.Writer, mme *MemoryMapEntry) {244	var flags elf.ProgFlag245	if mme.Read {246		flags |= elf.PF_R247	}248	if mme.Write {249		flags |= elf.PF_W250	}251	if mme.Exec {252		flags |= elf.PF_X253	}254	w.Progs = append(w.Progs, &elf.ProgHeader{255		Type:   elf.PT_LOAD,256		Flags:  flags,257		Off:    uint64(w.Here()),258		Vaddr:  mme.Addr,259		Paddr:  0,260		Filesz: mme.Size,261		Memsz:  mme.Size,262		Align:  0,263	})264	buf := make([]byte, 1024*1024)265	addr := mme.Addr266	sz := mme.Size267	mem := t.Memory()268	for sz > 0 {269		if w.Err != nil {270			state.setErr(fmt.Errorf("error writing to output file: %v", w.Err))271			return272		}273		if state.isCanceled() {274			return275		}276		chunk := buf277		if uint64(len(chunk)) > sz {278			chunk = chunk[:sz]279		}280		n, err := mem.ReadMemory(chunk, addr)281		for i := n; i < len(chunk); i++ {282			chunk[i] = 0283		}284		// Errors and short reads are ignored, the most likely reason is that...

setErr

Using AI Code Generation

1import "fmt"2func main() {3    p := new(prog)4    p.setErr("Error")5    fmt.Println(p.getErr())6}7import "fmt"8func main() {9    p := new(prog)10    p.setErr("Error")11    fmt.Println(p.getErr())12}13import "fmt"14func main() {15    p := new(prog)16    p.setErr("Error")17    fmt.Println(p.getErr())18}19import "fmt"20func main() {21    p := new(prog)22    p.setErr("Error")23    fmt.Println(p.getErr())24}25import "fmt"26func main() {27    p := new(prog)28    p.setErr("Error")29    fmt.Println(p.getErr())30}31import "fmt"32func main() {33    p := new(prog)34    p.setErr("Error")35    fmt.Println(p.getErr())36}37import "fmt"38func main() {39    p := new(prog)40    p.setErr("Error")41    fmt.Println(p.getErr())42}43import "fmt"44func main() {45    p := new(prog)46    p.setErr("Error")47    fmt.Println(p.getErr())48}49import "fmt"50func main() {51    p := new(prog)52    p.setErr("Error")53    fmt.Println(p.getErr())54}55import "fmt"56func main() {57    p := new(prog)58    p.setErr("Error")59    fmt.Println(p.getErr())60}

setErr

Using AI Code Generation

1import "fmt"2func main() {3    p.setErr()4    fmt.Printf("%v", p)5}6type prog struct {7}8func (p *prog) setErr() {9    p.err = fmt.Errorf("error")10}

setErr

Using AI Code Generation

1import (2func main() {3 p := new(prog)4 p.setErr("Error: No file found")5 fmt.Println(p.err)6}

setErr

Using AI Code Generation

1import (2func main() {3 p := prog.Prog{}4 p.SetErr("Error")5 fmt.Println(p.Err)6}

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