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Syzkaller
csource
generateSyscallDefines

How to use generateSyscallDefines method of csource Package

Best Syzkaller code snippet using csource.generateSyscallDefines

csource.go

Source:csource.go

...40		return nil, err41	}42	ctx.w.Write(hdr)43	ctx.print("\n")44	ctx.generateSyscallDefines()45	if len(vars) != 0 {46		ctx.printf("uint64_t r[%v] = {", len(vars))47		for i, v := range vars {48			if i != 0 {49				ctx.printf(", ")50			}51			ctx.printf("0x%x", v)52		}53		ctx.printf("};\n")54	}55	needProcID := opts.Procs > 1 || opts.EnableCgroups56	for _, c := range p.Calls {57		if c.Meta.CallName == "syz_mount_image" ||58			c.Meta.CallName == "syz_read_part_table" {59			needProcID = true60		}61	}62	if needProcID {63		ctx.printf("unsigned long long procid;\n")64	}65	if !opts.Repeat {66		ctx.generateTestFunc(calls, len(vars) != 0, "loop")67		ctx.print("int main()\n{\n")68		for _, c := range mmapCalls {69			ctx.printf("%s", c)70		}71		if opts.HandleSegv {72			ctx.printf("\tinstall_segv_handler();\n")73		}74		if opts.UseTmpDir {75			ctx.printf("\tuse_temporary_dir();\n")76		}77		if opts.Sandbox != "" {78			ctx.printf("\tint pid = do_sandbox_%v();\n", opts.Sandbox)79			ctx.print("\tint status = 0;\n")80			ctx.print("\twhile (waitpid(pid, &status, __WALL) != pid) {}\n")81		} else {82			if opts.EnableTun {83				ctx.printf("\tinitialize_tun();\n")84				ctx.printf("\tinitialize_netdevices();\n")85			}86			ctx.print("\tloop();\n")87		}88		ctx.print("\treturn 0;\n}\n")89	} else {90		ctx.generateTestFunc(calls, len(vars) != 0, "execute_one")91		if opts.Procs <= 1 {92			ctx.print("int main()\n{\n")93			for _, c := range mmapCalls {94				ctx.printf("%s", c)95			}96			if opts.HandleSegv {97				ctx.print("\tinstall_segv_handler();\n")98			}99			if opts.UseTmpDir {100				ctx.print("\tchar *cwd = get_current_dir_name();\n")101			}102			ctx.print("\tfor (;;) {\n")103			if opts.UseTmpDir {104				ctx.print("\t\tif (chdir(cwd))\n")105				ctx.print("\t\t\tfail(\"failed to chdir\");\n")106				ctx.print("\t\tuse_temporary_dir();\n")107			}108			if opts.Sandbox != "" {109				ctx.printf("\t\tint pid = do_sandbox_%v();\n", opts.Sandbox)110				ctx.print("\t\tint status = 0;\n")111				ctx.print("\t\twhile (waitpid(pid, &status, __WALL) != pid) {}\n")112			} else {113				if opts.EnableTun {114					ctx.printf("\t\tinitialize_tun();\n")115					ctx.printf("\t\tinitialize_netdevices();\n")116				}117				ctx.print("\t\tloop();\n")118			}119			ctx.print("\t}\n}\n")120		} else {121			ctx.print("int main()\n{\n")122			for _, c := range mmapCalls {123				ctx.printf("%s", c)124			}125			if opts.UseTmpDir {126				ctx.print("\tchar *cwd = get_current_dir_name();\n")127			}128			ctx.printf("\tfor (procid = 0; procid < %v; procid++) {\n", opts.Procs)129			ctx.print("\t\tif (fork() == 0) {\n")130			if opts.HandleSegv {131				ctx.print("\t\t\tinstall_segv_handler();\n")132			}133			ctx.print("\t\t\tfor (;;) {\n")134			if opts.UseTmpDir {135				ctx.print("\t\t\t\tif (chdir(cwd))\n")136				ctx.print("\t\t\t\t\tfail(\"failed to chdir\");\n")137				ctx.print("\t\t\t\tuse_temporary_dir();\n")138			}139			if opts.Sandbox != "" {140				ctx.printf("\t\t\t\tint pid = do_sandbox_%v();\n", opts.Sandbox)141				ctx.print("\t\t\t\tint status = 0;\n")142				ctx.print("\t\t\t\twhile (waitpid(pid, &status, __WALL) != pid) {}\n")143			} else {144				if opts.EnableTun {145					ctx.printf("\t\t\t\tinitialize_tun();\n")146					ctx.printf("\t\t\t\tinitialize_netdevices();\n")147				}148				ctx.print("\t\t\t\tloop();\n")149			}150			ctx.print("\t\t\t}\n")151			ctx.print("\t\t}\n")152			ctx.print("\t}\n")153			ctx.print("\tsleep(1000000);\n")154			ctx.print("\treturn 0;\n}\n")155		}156	}157	// Remove NONFAILING and debug calls.158	result := ctx.w.Bytes()159	if !opts.HandleSegv {160		re := regexp.MustCompile(`\t*NONFAILING\((.*)\);\n`)161		result = re.ReplaceAll(result, []byte("$1;\n"))162	}163	if !opts.Debug {164		re := regexp.MustCompile(`\t*debug\(.*\);\n`)165		result = re.ReplaceAll(result, nil)166		re = regexp.MustCompile(`\t*debug_dump_data\(.*\);\n`)167		result = re.ReplaceAll(result, nil)168	}169	result = bytes.Replace(result, []byte("NORETURN"), nil, -1)170	result = bytes.Replace(result, []byte("PRINTF"), nil, -1)171	// Remove duplicate new lines.172	for {173		result1 := bytes.Replace(result, []byte{'\n', '\n', '\n'}, []byte{'\n', '\n'}, -1)174		result1 = bytes.Replace(result1, []byte("\n\n#include"), []byte("\n#include"), -1)175		if len(result1) == len(result) {176			break177		}178		result = result1179	}180	return result, nil181}182type context struct {183	p         *prog.Prog184	opts      Options185	target    *prog.Target186	sysTarget *targets.Target187	w         *bytes.Buffer188	calls     map[string]uint64 // CallName -> NR189}190func (ctx *context) print(str string) {191	ctx.w.WriteString(str)192}193func (ctx *context) printf(str string, args ...interface{}) {194	ctx.print(fmt.Sprintf(str, args...))195}196func (ctx *context) generateTestFunc(calls []string, hasVars bool, name string) {197	opts := ctx.opts198	if !opts.Threaded && !opts.Collide {199		ctx.printf("void %v()\n{\n", name)200		if hasVars {201			ctx.printf("\tlong res = 0;\n")202		}203		if opts.Debug {204			// Use debug to avoid: error: âdebugâ defined but not used.205			ctx.printf("\tdebug(\"%v\\n\");\n", name)206		}207		if opts.Repro {208			ctx.printf("\tsyscall(SYS_write, 1, \"executing program\\n\", strlen(\"executing program\\n\"));\n")209		}210		for _, c := range calls {211			ctx.printf("%s", c)212		}213		ctx.printf("}\n\n")214	} else {215		ctx.printf("void execute_call(int call)\n{\n")216		if hasVars {217			ctx.printf("\tlong res;")218		}219		ctx.printf("\tswitch (call) {\n")220		for i, c := range calls {221			ctx.printf("\tcase %v:\n", i)222			ctx.printf("%s", strings.Replace(c, "\t", "\t\t", -1))223			ctx.printf("\t\tbreak;\n")224		}225		ctx.printf("\t}\n")226		ctx.printf("}\n\n")227		ctx.printf("void %v()\n{\n", name)228		if opts.Debug {229			// Use debug to avoid: error: âdebugâ defined but not used.230			ctx.printf("\tdebug(\"%v\\n\");\n", name)231		}232		if opts.Repro {233			ctx.printf("\tsyscall(SYS_write, 1, \"executing program\\n\", strlen(\"executing program\\n\"));\n")234		}235		ctx.printf("\texecute(%v);\n", len(calls))236		if opts.Collide {237			ctx.printf("\tcollide = 1;\n")238			ctx.printf("\texecute(%v);\n", len(calls))239		}240		ctx.printf("}\n\n")241	}242}243func (ctx *context) generateSyscallDefines() {244	prefix := ctx.sysTarget.SyscallPrefix245	for name, nr := range ctx.calls {246		if strings.HasPrefix(name, "syz_") || !ctx.sysTarget.NeedSyscallDefine(nr) {247			continue248		}249		ctx.printf("#ifndef %v%v\n", prefix, name)250		ctx.printf("#define %v%v %v\n", prefix, name, nr)251		ctx.printf("#endif\n")252	}253	if ctx.target.OS == "linux" && ctx.target.PtrSize == 4 {254		// This is a dirty hack.255		// On 32-bit linux mmap translated to old_mmap syscall which has a different signature.256		// mmap2 has the right signature. syz-extract translates mmap to mmap2, do the same here.257		ctx.printf("#undef __NR_mmap\n")...

generateSyscallDefines

Using AI Code Generation

1import (2func main() {3	target, err := prog.GetTarget("linux", "amd64")4	if err != nil {5		fmt.Println(err)6	}7	csource := prog.GenCSource{8	}9	fmt.Println(csource.GenerateSyscallDefines())10}

generateSyscallDefines

Using AI Code Generation

1import (2func main() {3    target, err := prog.GetTarget("linux", "amd64")4    if err != nil {5        println(err.Error())6    }7    csource := target.CSource()8    defines, err := csource.GenerateSyscallDefines(sys.DefaultTarget.Syscalls)9    if err != nil {10        println(err.Error())11    }12    println(defines)13}14typedef long int ptrdiff_t;15typedef long unsigned int size_t;16typedef int wchar_t;

generateSyscallDefines

Using AI Code Generation

1import (2func main() {3	target := prog.GetTarget("linux", "amd64")4	csource := csource.New(target)5	syscallDefines := csource.GenerateSyscallDefines()6	fmt.Println(syscallDefines)7}8const (

generateSyscallDefines

Using AI Code Generation

1import (2func main() {3    csource := compiler.NewCSource(types.StdSizes)4    csource.GenerateSyscallDefines()5    fmt.Printf(csource.Buffer.String())6}

generateSyscallDefines

Using AI Code Generation

1import (2func main() {3    csource := compiler.NewCSource("amd64", compiler.CSourceOpts{})4    defines, err := csource.GenerateSyscallDefines()5    if err != nil {6        fmt.Println("Error while generating syscall defines")7    }8    fmt.Println(defines)9}

generateSyscallDefines

Using AI Code Generation

1import (2func main() {3	target, err := prog.GetTarget("linux", "amd64")4	if err != nil {5		fmt.Printf("error while getting target details: %v", err)6	}7	cs := compiler.NewCSource(target)8	cs.GenerateSyscallDefines()9	fmt.Printf("%s", cs.String())10}

generateSyscallDefines

Using AI Code Generation

1import (2func main() {3	defines, err := compiler.GenerateSyscallDefines("amd64")4	if err != nil {5		fmt.Println("error while generating the syscall defines")6	}7	fmt.Println(defines)8}9typedef long unsigned int size_t;

generateSyscallDefines

Using AI Code Generation

1import (2func main() {3	data, err := ioutil.ReadFile("test.txt")4	if err != nil {5		fmt.Println("File reading error", err)6	}7	fmt.Println("Contents of file:", string(data))8	cs := csource.New(&csource.Options{9		Defines: string(data),10	})11	defines, err := cs.GenerateSyscallDefines()12	if err != nil {13		fmt.Println("Error generating defines", err)14	}15	fmt.Println("Defines:", defines)16}

generateSyscallDefines

Using AI Code Generation

1import (2func main() {3 src := compiler.NewSource()4 src.GenerateSyscallDefines(1)5 fmt.Println(src.Data())6}

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