style: modernize to splitseq, cut, min, maps.copy and range-over-int

debug/ptrace_linux.go

@@ -72,7 +72,7 @@ func LaunchWithBuffers(gasmBin, asmPath, funcName string, args []byte, bufSpec s
 	s := &Session{pid: cmd.Process.Pid, cmd: cmd}
 
 	readyFile := filepath.Join(tmpDir, "ready")
-	for i := 0; i < 500; i++ {
+	for range 500 {
 		if _, err := os.Stat(readyFile); err == nil {
 			break
 		}
@@ -86,7 +86,7 @@ func LaunchWithBuffers(gasmBin, asmPath, funcName string, args []byte, bufSpec s
 	}
 
 	entryFile := filepath.Join(tmpDir, "entry")
-	for i := 0; i < 500; i++ {
+	for range 500 {
 		if _, err := os.Stat(entryFile); err == nil {
 			break
 		}
@@ -115,7 +115,7 @@ func LaunchWithBuffers(gasmBin, asmPath, funcName string, args []byte, bufSpec s
 	if bufSpec != "" {
 		addrFile := filepath.Join(tmpDir, "bufaddrs")
 		if data, err := os.ReadFile(addrFile); err == nil {
-			for _, line := range strings.Split(strings.TrimSpace(string(data)), "\n") {
+			for line := range strings.SplitSeq(strings.TrimSpace(string(data)), "\n") {
 				var addr uint64
 				if _, err := fmt.Sscanf(line, "%d", &addr); err == nil {
 					bufAddrs = append(bufAddrs, addr)
@@ -190,10 +190,7 @@ func (s *Session) ReadMemory(addr uint64, length int) ([]byte, error) {
 // WriteMemory writes bytes to the debuggee's memory at addr.
 func (s *Session) WriteMemory(addr uint64, data []byte) error {
 	for i := 0; i < len(data); i += 8 {
-		end := i + 8
-		if end > len(data) {
-			end = len(data)
-		}
+		end := min(i+8, len(data))
 		var word uint64
 		for j := 0; j < end-i; j++ {
 			word |= uint64(data[i+j]) << (8 * j)
@@ -275,7 +272,7 @@ func findRWXMapping(pid int) uint64 {
 	if err != nil {
 		return 0
 	}
-	for _, line := range strings.Split(string(data), "\n") {
+	for line := range strings.SplitSeq(string(data), "\n") {
 		fields := strings.Fields(line)
 		if len(fields) < 2 {
 			continue