From 60c880a0cc7e126a1dd3b47d1e3498b8a3471072 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Uwe=20Kr=C3=BCger?=
 <45282134+UweKrueger@users.noreply.github.com>
Date: Tue, 15 Jun 2021 13:47:11 +0200
Subject: [PATCH] vlib: use `malloc_noscan()` where possible (#10465)

---
 examples/ttf_font/example_ttf.v   |  2 +-
 vlib/builtin/int.v                | 10 +++++-----
 vlib/builtin/rune.v               |  2 +-
 vlib/builtin/utf8.c.v             |  4 ++--
 vlib/builtin/utf8.v               |  2 +-
 vlib/crypto/rand/rand_linux.c.v   |  2 +-
 vlib/crypto/rand/rand_solaris.c.v |  2 +-
 vlib/darwin/darwin.v              |  2 +-
 vlib/encoding/base64/base64.v     |  4 ++--
 vlib/encoding/utf8/utf8_util.v    |  2 +-
 vlib/glm/glm.v                    |  4 ++--
 vlib/mysql/mysql.v                |  2 +-
 vlib/net/http/backend_windows.c.v |  2 +-
 vlib/os/fd.c.v                    |  2 +-
 vlib/os/os_c.v                    | 30 +++++++++++++++---------------
 vlib/os/os_linux.c.v              | 27 ---------------------------
 vlib/os/os_nix.c.v                |  6 +++---
 vlib/os/os_windows.c.v            |  2 +-
 vlib/picoev/picoev.v              |  4 ++--
 vlib/rand/rand.v                  |  6 +++---
 vlib/strconv/format_mem.v         |  2 +-
 vlib/strings/strings.c.v          |  4 ++--
 vlib/term/ui/termios_nix.c.v      |  4 ++--
 vlib/time/parse.v                 |  2 +-
 vlib/v/builder/msvc.v             |  2 +-
 vlib/v/scanner/scanner.v          |  2 +-
 vlib/x/ttf/common.v               |  2 +-
 vlib/x/ttf/render_sokol_cpu.v     |  4 ++--
 28 files changed, 56 insertions(+), 83 deletions(-)

diff --git a/examples/ttf_font/example_ttf.v b/examples/ttf_font/example_ttf.v
index 216440a75d..1a7b04bcc6 100644
--- a/examples/ttf_font/example_ttf.v
+++ b/examples/ttf_font/example_ttf.v
@@ -145,7 +145,7 @@ fn main() {
 	app.ttf_render << &ttf.TTF_render_Sokol{
 		bmp: &ttf.BitMap{
 			tf: &(app.tf[0])
-			buf: unsafe { malloc(32000000) }
+			buf: unsafe { malloc_noscan(32000000) }
 			buf_size: (32000000)
 			color: 0xFF0000FF
 			// style: .raw
diff --git a/vlib/builtin/int.v b/vlib/builtin/int.v
index 20dcf80455..941862a744 100644
--- a/vlib/builtin/int.v
+++ b/vlib/builtin/int.v
@@ -42,7 +42,7 @@ fn (nn int) str_l(max int) string {
 			is_neg = true
 		}
 		mut index := max
-		mut buf := malloc(max + 1)
+		mut buf := malloc_noscan(max + 1)
 		buf[index] = 0
 		index--
 
@@ -119,7 +119,7 @@ pub fn (nn u32) str() string {
 			return '0'
 		}
 		max := 12
-		mut buf := malloc(max + 1)
+		mut buf := malloc_noscan(max + 1)
 		mut index := max
 		buf[index] = 0
 		index--
@@ -163,7 +163,7 @@ pub fn (nn i64) str() string {
 			return '0'
 		}
 		max := 20
-		mut buf := malloc(max + 1)
+		mut buf := malloc_noscan(max + 1)
 		mut is_neg := false
 		if n < 0 {
 			n = -n
@@ -210,7 +210,7 @@ pub fn (nn u64) str() string {
 			return '0'
 		}
 		max := 20
-		mut buf := malloc(max + 1)
+		mut buf := malloc_noscan(max + 1)
 		mut index := max
 		buf[index] = 0
 		index--
@@ -423,7 +423,7 @@ pub fn (b byte) str() string {
 // Example: assert byte(97).ascii_str() == 'a'
 pub fn (b byte) ascii_str() string {
 	mut str := string{
-		str: unsafe { malloc(2) }
+		str: unsafe { malloc_noscan(2) }
 		len: 1
 	}
 	unsafe {
diff --git a/vlib/builtin/rune.v b/vlib/builtin/rune.v
index 37284c47f1..7e7cc65ff1 100644
--- a/vlib/builtin/rune.v
+++ b/vlib/builtin/rune.v
@@ -45,7 +45,7 @@ pub fn (b []byte) clone() []byte {
 // TODO remove this once runes are implemented
 pub fn (b []byte) bytestr() string {
 	unsafe {
-		buf := malloc(b.len + 1)
+		buf := malloc_noscan(b.len + 1)
 		C.memcpy(buf, b.data, b.len)
 		buf[b.len] = 0
 		return tos(buf, b.len)
diff --git a/vlib/builtin/utf8.c.v b/vlib/builtin/utf8.c.v
index c7e7157fc8..f2ead3aaf9 100644
--- a/vlib/builtin/utf8.c.v
+++ b/vlib/builtin/utf8.c.v
@@ -9,7 +9,7 @@ pub fn (_str string) to_wide() &u16 {
 		unsafe {
 			num_chars := (C.MultiByteToWideChar(cp_utf8, 0, &char(_str.str), _str.len,
 				0, 0))
-			mut wstr := &u16(malloc((num_chars + 1) * 2)) // sizeof(wchar_t)
+			mut wstr := &u16(malloc_noscan((num_chars + 1) * 2)) // sizeof(wchar_t)
 			if wstr != 0 {
 				C.MultiByteToWideChar(cp_utf8, 0, &char(_str.str), _str.len, wstr, num_chars)
 				C.memset(&byte(wstr) + num_chars * 2, 0, 2)
@@ -38,7 +38,7 @@ pub fn string_from_wide2(_wstr &u16, len int) string {
 	$if windows {
 		unsafe {
 			num_chars := C.WideCharToMultiByte(cp_utf8, 0, _wstr, len, 0, 0, 0, 0)
-			mut str_to := malloc(num_chars + 1)
+			mut str_to := malloc_noscan(num_chars + 1)
 			if str_to != 0 {
 				C.WideCharToMultiByte(cp_utf8, 0, _wstr, len, &char(str_to), num_chars,
 					0, 0)
diff --git a/vlib/builtin/utf8.v b/vlib/builtin/utf8.v
index f55d1b087a..6f3745a1a1 100644
--- a/vlib/builtin/utf8.v
+++ b/vlib/builtin/utf8.v
@@ -11,7 +11,7 @@ pub fn utf8_char_len(b byte) int {
 // utf32 == Codepoint
 pub fn utf32_to_str(code u32) string {
 	unsafe {
-		mut buffer := malloc(5)
+		mut buffer := malloc_noscan(5)
 		return utf32_to_str_no_malloc(code, buffer)
 	}
 }
diff --git a/vlib/crypto/rand/rand_linux.c.v b/vlib/crypto/rand/rand_linux.c.v
index 5cacccf0e5..52ff3da160 100644
--- a/vlib/crypto/rand/rand_linux.c.v
+++ b/vlib/crypto/rand/rand_linux.c.v
@@ -11,7 +11,7 @@ const (
 
 // read returns an array of `bytes_needed` random bytes read from the OS.
 pub fn read(bytes_needed int) ?[]byte {
-	mut buffer := unsafe { malloc(bytes_needed) }
+	mut buffer := unsafe { malloc_noscan(bytes_needed) }
 	mut bytes_read := 0
 	mut remaining_bytes := bytes_needed
 	// getrandom syscall wont block if requesting <= 256 bytes
diff --git a/vlib/crypto/rand/rand_solaris.c.v b/vlib/crypto/rand/rand_solaris.c.v
index cec2e9a84c..8d0ba0cd85 100644
--- a/vlib/crypto/rand/rand_solaris.c.v
+++ b/vlib/crypto/rand/rand_solaris.c.v
@@ -14,7 +14,7 @@ const (
 
 // read returns an array of `bytes_needed` random bytes read from the OS.
 pub fn read(bytes_needed int) ?[]byte {
-	mut buffer := unsafe { malloc(bytes_needed) }
+	mut buffer := unsafe { malloc_noscan(bytes_needed) }
 	mut bytes_read := 0
 	mut remaining_bytes := bytes_needed
 	// getrandom syscall wont block if requesting <= 256 bytes
diff --git a/vlib/darwin/darwin.v b/vlib/darwin/darwin.v
index a43912dfd9..b86636e101 100644
--- a/vlib/darwin/darwin.v
+++ b/vlib/darwin/darwin.v
@@ -42,7 +42,7 @@ pub fn resource_path() string {
 		panic('CFBundleCopyResourcesDirectoryURL failed')
 	}
 	buffer_size := 4096
-	mut buffer := unsafe { malloc(buffer_size) }
+	mut buffer := unsafe { malloc_noscan(buffer_size) }
 	unsafe {
 		buffer[0] = 0
 	}
diff --git a/vlib/encoding/base64/base64.v b/vlib/encoding/base64/base64.v
index 8610471fc2..203ff0b812 100644
--- a/vlib/encoding/base64/base64.v
+++ b/vlib/encoding/base64/base64.v
@@ -35,7 +35,7 @@ pub fn decode_str(data string) string {
 		return ''
 	}
 	unsafe {
-		buffer := malloc(size + 1)
+		buffer := malloc_noscan(size + 1)
 		buffer[size] = 0
 		return tos(buffer, decode_in_buffer(data, buffer))
 	}
@@ -62,7 +62,7 @@ fn alloc_and_encode(src &byte, len int) string {
 		return ''
 	}
 	unsafe {
-		buffer := malloc(size + 1)
+		buffer := malloc_noscan(size + 1)
 		buffer[size] = 0
 		return tos(buffer, encode_from_buffer(buffer, src, len))
 	}
diff --git a/vlib/encoding/utf8/utf8_util.v b/vlib/encoding/utf8/utf8_util.v
index d95db92dc2..bfdc99092c 100644
--- a/vlib/encoding/utf8/utf8_util.v
+++ b/vlib/encoding/utf8/utf8_util.v
@@ -404,7 +404,7 @@ fn utf8_to_upper(in_cp int) int {
 fn up_low(s string, upper_flag bool) string {
 	mut index := 0
 	mut tab_char := 0
-	mut str_res := unsafe { malloc(s.len + 1) }
+	mut str_res := unsafe { malloc_noscan(s.len + 1) }
 
 	for {
 		ch_len := utf8_char_len(s[index])
diff --git a/vlib/glm/glm.v b/vlib/glm/glm.v
index fd08a61b3d..abd798189f 100644
--- a/vlib/glm/glm.v
+++ b/vlib/glm/glm.v
@@ -129,7 +129,7 @@ fn rotate(m Mat4, angle f32, vec Vec3) Mat4 {
 }
 */
 fn f32_calloc(n int) &f32 {
-	return voidptr(vcalloc(n * int(sizeof(f32))))
+	return voidptr(vcalloc_noscan(n * int(sizeof(f32))))
 }
 
 // fn translate(vec Vec3) *f32 {
@@ -382,7 +382,7 @@ fn ortho_js(left f32, right f32, bottom f32, top f32) &f32 {
 	bt := 1.0 / (bottom - top)
 	nf := f32(1.0) / 1.0 // (mynear -myfar)
 	unsafe {
-		mut out := &f32(malloc(int(sizeof(f32) * 16)))
+		mut out := &f32(malloc_noscan(int(sizeof(f32) * 16)))
 		out[0] = -2.0 * lr
 		out[1] = 0
 		out[2] = 0
diff --git a/vlib/mysql/mysql.v b/vlib/mysql/mysql.v
index 0e04133b6c..8a9fbb3f5f 100644
--- a/vlib/mysql/mysql.v
+++ b/vlib/mysql/mysql.v
@@ -126,7 +126,7 @@ pub fn (conn &Connection) tables(wildcard string) ?[]string {
 // taking into account the current character set of the connection.
 pub fn (conn &Connection) escape_string(s string) string {
 	unsafe {
-		to := malloc(2 * s.len + 1)
+		to := malloc_noscan(2 * s.len + 1)
 		C.mysql_real_escape_string_quote(conn.conn, to, s.str, s.len, `\'`)
 		return to.vstring()
 	}
diff --git a/vlib/net/http/backend_windows.c.v b/vlib/net/http/backend_windows.c.v
index 702afee234..ffa8ce1dfa 100644
--- a/vlib/net/http/backend_windows.c.v
+++ b/vlib/net/http/backend_windows.c.v
@@ -12,7 +12,7 @@ fn C.new_tls_context() C.TlsContext
 fn (req &Request) ssl_do(port int, method Method, host_name string, path string) ?Response {
 	mut ctx := C.new_tls_context()
 	C.vschannel_init(&ctx)
-	mut buff := unsafe { malloc(C.vsc_init_resp_buff_size) }
+	mut buff := unsafe { malloc_noscan(C.vsc_init_resp_buff_size) }
 	addr := host_name
 	sdata := req.build_request_headers(method, host_name, path)
 	$if trace_http_request ? {
diff --git a/vlib/os/fd.c.v b/vlib/os/fd.c.v
index 1bb59fd836..de69e38cb9 100644
--- a/vlib/os/fd.c.v
+++ b/vlib/os/fd.c.v
@@ -49,7 +49,7 @@ pub fn fd_read(fd int, maxbytes int) (string, int) {
 		return '', 0
 	}
 	unsafe {
-		mut buf := malloc(maxbytes + 1)
+		mut buf := malloc_noscan(maxbytes + 1)
 		nbytes := C.read(fd, buf, maxbytes)
 		if nbytes < 0 {
 			free(buf)
diff --git a/vlib/os/os_c.v b/vlib/os/os_c.v
index b95406b72e..c3741db449 100644
--- a/vlib/os/os_c.v
+++ b/vlib/os/os_c.v
@@ -108,7 +108,7 @@ pub fn read_file(path string) ?string {
 	// C.fseek(fp, 0, SEEK_SET)  // same as `C.rewind(fp)` below
 	C.rewind(fp)
 	unsafe {
-		mut str := malloc(fsize + 1)
+		mut str := malloc_noscan(fsize + 1)
 		nelements := int(C.fread(str, 1, fsize, fp))
 		is_eof := int(C.feof(fp))
 		is_error := int(C.ferror(fp))
@@ -496,7 +496,7 @@ pub fn get_raw_line() string {
 	$if windows {
 		unsafe {
 			max_line_chars := 256
-			buf := malloc(max_line_chars * 2)
+			buf := malloc_noscan(max_line_chars * 2)
 			h_input := C.GetStdHandle(C.STD_INPUT_HANDLE)
 			mut bytes_read := u32(0)
 			if is_atty(0) > 0 {
@@ -538,7 +538,7 @@ pub fn get_raw_stdin() []byte {
 		unsafe {
 			block_bytes := 512
 			mut old_size := block_bytes
-			mut buf := malloc(block_bytes)
+			mut buf := malloc_noscan(block_bytes)
 			h_input := C.GetStdHandle(C.STD_INPUT_HANDLE)
 			mut bytes_read := 0
 			mut offset := 0
@@ -584,7 +584,7 @@ pub fn read_file_array<T>(path string) []T {
 	C.rewind(fp)
 	// read the actual data from the file
 	len := fsize / tsize
-	buf := unsafe { malloc(fsize) }
+	buf := unsafe { malloc_noscan(fsize) }
 	nread := C.fread(buf, tsize, len, fp)
 	C.fclose(fp)
 	return unsafe {
@@ -619,7 +619,7 @@ pub fn on_segfault(f voidptr) {
 [manualfree]
 pub fn executable() string {
 	$if linux {
-		mut xresult := vcalloc(max_path_len)
+		mut xresult := vcalloc_noscan(max_path_len)
 		count := C.readlink(c'/proc/self/exe', &char(xresult), max_path_len)
 		if count < 0 {
 			eprintln('os.executable() failed at reading /proc/self/exe to get exe path')
@@ -630,7 +630,7 @@ pub fn executable() string {
 	$if windows {
 		max := 512
 		size := max * 2 // max_path_len * sizeof(wchar_t)
-		mut result := unsafe { &u16(vcalloc(size)) }
+		mut result := unsafe { &u16(vcalloc_noscan(size)) }
 		len := C.GetModuleFileName(0, result, max)
 		// determine if the file is a windows symlink
 		attrs := C.GetFileAttributesW(result)
@@ -639,7 +639,7 @@ pub fn executable() string {
 			// gets handle with GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0
 			file := C.CreateFile(result, 0x80000000, 1, 0, 3, 0x80, 0)
 			if file != voidptr(-1) {
-				final_path := unsafe { &u16(vcalloc(size)) }
+				final_path := unsafe { &u16(vcalloc_noscan(size)) }
 				// https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getfinalpathnamebyhandlew
 				final_len := C.GetFinalPathNameByHandleW(file, final_path, size, 0)
 				if final_len < size {
@@ -655,7 +655,7 @@ pub fn executable() string {
 		return unsafe { string_from_wide2(result, len) }
 	}
 	$if macos {
-		mut result := vcalloc(max_path_len)
+		mut result := vcalloc_noscan(max_path_len)
 		pid := C.getpid()
 		ret := proc_pidpath(pid, result, max_path_len)
 		if ret <= 0 {
@@ -665,7 +665,7 @@ pub fn executable() string {
 		return unsafe { result.vstring() }
 	}
 	$if freebsd {
-		mut result := vcalloc(max_path_len)
+		mut result := vcalloc_noscan(max_path_len)
 		mib := [1 /* CTL_KERN */, 14 /* KERN_PROC */, 12 /* KERN_PROC_PATHNAME */, -1]
 		size := max_path_len
 		unsafe { C.sysctl(mib.data, 4, result, &size, 0, 0) }
@@ -679,7 +679,7 @@ pub fn executable() string {
 	$if haiku {
 	}
 	$if netbsd {
-		mut result := vcalloc(max_path_len)
+		mut result := vcalloc_noscan(max_path_len)
 		count := C.readlink(c'/proc/curproc/exe', &char(result), max_path_len)
 		if count < 0 {
 			eprintln('os.executable() failed at reading /proc/curproc/exe to get exe path')
@@ -688,7 +688,7 @@ pub fn executable() string {
 		return unsafe { result.vstring_with_len(count) }
 	}
 	$if dragonfly {
-		mut result := vcalloc(max_path_len)
+		mut result := vcalloc_noscan(max_path_len)
 		count := C.readlink(c'/proc/curproc/file', &char(result), max_path_len)
 		if count < 0 {
 			eprintln('os.executable() failed at reading /proc/curproc/file to get exe path')
@@ -751,7 +751,7 @@ pub fn getwd() string {
 	$if windows {
 		max := 512 // max_path_len * sizeof(wchar_t)
 		unsafe {
-			buf := &u16(vcalloc(max * 2))
+			buf := &u16(vcalloc_noscan(max * 2))
 			if C._wgetcwd(buf, max) == 0 {
 				free(buf)
 				return ''
@@ -759,7 +759,7 @@ pub fn getwd() string {
 			return string_from_wide(buf)
 		}
 	} $else {
-		buf := vcalloc(max_path_len)
+		buf := vcalloc_noscan(max_path_len)
 		unsafe {
 			if C.getcwd(&char(buf), max_path_len) == 0 {
 				free(buf)
@@ -782,7 +782,7 @@ pub fn real_path(fpath string) string {
 	$if windows {
 		// GetFullPathName doesn't work with symbolic links,
 		// so if it is not a file, get full path
-		fullpath = unsafe { &u16(vcalloc(max_path_len * 2)) }
+		fullpath = unsafe { &u16(vcalloc_noscan(max_path_len * 2)) }
 		// TODO: check errors if path len is not enough
 		ret := C.GetFullPathName(fpath.to_wide(), max_path_len, fullpath, 0)
 		if ret == 0 {
@@ -791,7 +791,7 @@ pub fn real_path(fpath string) string {
 		}
 		res = unsafe { string_from_wide(fullpath) }
 	} $else {
-		fullpath = vcalloc(max_path_len)
+		fullpath = vcalloc_noscan(max_path_len)
 		ret := &char(C.realpath(&char(fpath.str), &char(fullpath)))
 		if ret == 0 {
 			unsafe { free(fullpath) }
diff --git a/vlib/os/os_linux.c.v b/vlib/os/os_linux.c.v
index fb5e6eee50..e178795b63 100644
--- a/vlib/os/os_linux.c.v
+++ b/vlib/os/os_linux.c.v
@@ -17,30 +17,3 @@ pub const (
 	sys_mkdir = 83
 	sys_creat = 85
 )
-
-/*
-// TODO no pub => error
-pub fn write(fd int, data voidptr, nbytes int) int {
-	return syscall5(
-          1, // SYS_write
-          fd,
-          data,
-          nbytes,
-          0, // ignored
-          0  // ignored
-	)
-}
-
-pub fn println(s string) {
-	write(1, (s + '\n').str, s.len)
-}
-
-fn mmap(start voidptr, len, prot, flags, fd, off int) byteptr {
-	return syscall6(9, start, len, prot, flags, fd, off) // sys_mmap
-}
-
-pub fn malloc(n int) byteptr {
-	println('malloc($n)')
-	return mmap(0, n, 3, 		4098, //prot_read|prot_write,
-	 -1,0)			//map_private|map_anonymous,
-*/
diff --git a/vlib/os/os_nix.c.v b/vlib/os/os_nix.c.v
index ab5a855b7f..f70cf623c8 100644
--- a/vlib/os/os_nix.c.v
+++ b/vlib/os/os_nix.c.v
@@ -68,7 +68,7 @@ pub fn uname() Uname {
 	mut u := Uname{}
 	utsize := sizeof(C.utsname)
 	unsafe {
-		x := malloc(int(utsize))
+		x := malloc_noscan(int(utsize))
 		d := &C.utsname(x)
 		if C.uname(d) == 0 {
 			u.sysname = cstring_to_vstring(d.sysname)
@@ -85,7 +85,7 @@ pub fn uname() Uname {
 pub fn hostname() string {
 	mut hstnme := ''
 	size := 256
-	mut buf := unsafe { &char(malloc(size)) }
+	mut buf := unsafe { &char(malloc_noscan(size)) }
 	if C.gethostname(buf, size) == 0 {
 		hstnme = unsafe { cstring_to_vstring(buf) }
 		unsafe { free(buf) }
@@ -203,7 +203,7 @@ pub fn execute(cmd string) Result {
 			output: 'exec("$cmd") failed'
 		}
 	}
-	buf := unsafe { malloc(4096) }
+	buf := unsafe { malloc_noscan(4096) }
 	mut res := strings.new_builder(1024)
 	defer {
 		unsafe { res.free() }
diff --git a/vlib/os/os_windows.c.v b/vlib/os/os_windows.c.v
index 9e22976491..d187aff61d 100644
--- a/vlib/os/os_windows.c.v
+++ b/vlib/os/os_windows.c.v
@@ -167,7 +167,7 @@ pub fn get_file_handle(path string) HANDLE {
 pub fn get_module_filename(handle HANDLE) ?string {
 	unsafe {
 		mut sz := 4096 // Optimized length
-		mut buf := &u16(malloc(4096))
+		mut buf := &u16(malloc_noscan(4096))
 		for {
 			status := int(C.GetModuleFileNameW(handle, voidptr(&buf), sz))
 			match status {
diff --git a/vlib/picoev/picoev.v b/vlib/picoev/picoev.v
index b21c79a93e..7c11d03dbf 100644
--- a/vlib/picoev/picoev.v
+++ b/vlib/picoev/picoev.v
@@ -243,8 +243,8 @@ pub fn new(config Config) &Picoev {
 		timeout_secs: config.timeout_secs
 		max_headers: config.max_headers
 		date: C.get_date()
-		buf: unsafe { malloc(picoev.max_fds * picoev.max_read + 1) }
-		out: unsafe { malloc(picoev.max_fds * picoev.max_write + 1) }
+		buf: unsafe { malloc_noscan(picoev.max_fds * picoev.max_read + 1) }
+		out: unsafe { malloc_noscan(picoev.max_fds * picoev.max_write + 1) }
 	}
 	C.picoev_add(loop, fd, int(Event.read), 0, accept_callback, pv)
 	go update_date(mut pv)
diff --git a/vlib/rand/rand.v b/vlib/rand/rand.v
index 52dc0a3f86..ef832500da 100644
--- a/vlib/rand/rand.v
+++ b/vlib/rand/rand.v
@@ -197,7 +197,7 @@ pub fn string_from_set(charset string, len int) string {
 	if len == 0 {
 		return ''
 	}
-	mut buf := unsafe { malloc(len + 1) }
+	mut buf := unsafe { malloc_noscan(len + 1) }
 	for i in 0 .. len {
 		unsafe {
 			buf[i] = charset[intn(charset.len)]
@@ -228,7 +228,7 @@ pub fn ascii(len int) string {
 // See https://en.wikipedia.org/wiki/Universally_unique_identifier#Version_4_(random)
 pub fn uuid_v4() string {
 	buflen := 36
-	mut buf := unsafe { malloc(37) }
+	mut buf := unsafe { malloc_noscan(37) }
 	mut i_buf := 0
 	mut x := u64(0)
 	mut d := byte(0)
@@ -281,7 +281,7 @@ pub fn ulid() string {
 // ulid_at_millisecond does the same as `ulid` but takes a custom Unix millisecond timestamp via `unix_time_milli`.
 pub fn ulid_at_millisecond(unix_time_milli u64) string {
 	buflen := 26
-	mut buf := unsafe { malloc(27) }
+	mut buf := unsafe { malloc_noscan(27) }
 	mut t := unix_time_milli
 	mut i := 9
 	for i >= 0 {
diff --git a/vlib/strconv/format_mem.v b/vlib/strconv/format_mem.v
index 8b3804ff6f..61e9947b2c 100644
--- a/vlib/strconv/format_mem.v
+++ b/vlib/strconv/format_mem.v
@@ -440,7 +440,7 @@ pub fn format_es(f f64, p BF_param) string {
 [direct_array_access]
 pub fn remove_tail_zeros(s string) string {
 	unsafe{
-		mut buf := malloc(s.len + 1)
+		mut buf := malloc_noscan(s.len + 1)
 		mut i_d := 0
 		mut i_s := 0
 		
diff --git a/vlib/strings/strings.c.v b/vlib/strings/strings.c.v
index 9f7b0b6157..c020f5b402 100644
--- a/vlib/strings/strings.c.v
+++ b/vlib/strings/strings.c.v
@@ -5,7 +5,7 @@ pub fn repeat(c byte, n int) string {
 	if n <= 0 {
 		return ''
 	}
-	mut bytes := unsafe { malloc(n + 1) }
+	mut bytes := unsafe { malloc_noscan(n + 1) }
 	unsafe {
 		C.memset(bytes, c, n)
 		bytes[n] = `0`
@@ -22,7 +22,7 @@ pub fn repeat_string(s string, n int) string {
 	}
 	slen := s.len
 	blen := slen * n
-	mut bytes := unsafe { malloc(blen + 1) }
+	mut bytes := unsafe { malloc_noscan(blen + 1) }
 	for bi in 0 .. n {
 		bislen := bi * slen
 		for si in 0 .. slen {
diff --git a/vlib/term/ui/termios_nix.c.v b/vlib/term/ui/termios_nix.c.v
index 88f20de2ee..fb5ff76b25 100644
--- a/vlib/term/ui/termios_nix.c.v
+++ b/vlib/term/ui/termios_nix.c.v
@@ -173,7 +173,7 @@ fn get_cursor_position() (int, int) {
 	print('\033[6n')
 	mut s := ''
 	unsafe {
-		buf := malloc(25)
+		buf := malloc_noscan(25)
 		len := C.read(C.STDIN_FILENO, buf, 24)
 		buf[len] = 0
 		s = tos(buf, len)
@@ -196,7 +196,7 @@ fn supports_truecolor() bool {
 	print('\x1bP\$qm\x1b\\')
 	mut s := ''
 	unsafe {
-		buf := malloc(25)
+		buf := malloc_noscan(25)
 		len := C.read(C.STDIN_FILENO, buf, 24)
 		buf[len] = 0
 		s = tos(buf, len)
diff --git a/vlib/time/parse.v b/vlib/time/parse.v
index de9d928d0b..5233476ca5 100644
--- a/vlib/time/parse.v
+++ b/vlib/time/parse.v
@@ -36,7 +36,7 @@ pub fn parse_rfc2822(s string) ?Time {
 	pos := months_string.index(fields[2]) or { return error('Invalid time format: $s') }
 	mm := pos / 3 + 1
 	unsafe {
-		tmstr := malloc(s.len * 2)
+		tmstr := malloc_noscan(s.len * 2)
 		count := C.snprintf(&char(tmstr), (s.len * 2), c'%s-%02d-%s %s', fields[3].str,
 			mm, fields[1].str, fields[4].str)
 		return parse(tos(tmstr, count))
diff --git a/vlib/v/builder/msvc.v b/vlib/v/builder/msvc.v
index c8555237cd..903c0fb623 100644
--- a/vlib/v/builder/msvc.v
+++ b/vlib/v/builder/msvc.v
@@ -46,7 +46,7 @@ fn find_windows_kit_internal(key RegKey, versions []string) ?string {
 					continue
 				}
 				alloc_length := (required_bytes + 2)
-				mut value := &u16(malloc(int(alloc_length)))
+				mut value := &u16(malloc_noscan(int(alloc_length)))
 				if isnil(value) {
 					continue
 				}
diff --git a/vlib/v/scanner/scanner.v b/vlib/v/scanner/scanner.v
index f2c6148120..96dd6b14ed 100644
--- a/vlib/v/scanner/scanner.v
+++ b/vlib/v/scanner/scanner.v
@@ -237,7 +237,7 @@ fn (s Scanner) num_lit(start int, end int) string {
 	}
 	unsafe {
 		txt := s.text.str
-		mut b := malloc(end - start + 1) // add a byte for the endstring 0
+		mut b := malloc_noscan(end - start + 1) // add a byte for the endstring 0
 		mut i1 := 0
 		for i := start; i < end; i++ {
 			if txt[i] != scanner.num_sep {
diff --git a/vlib/x/ttf/common.v b/vlib/x/ttf/common.v
index 6fec0b76f5..ad88d33e3f 100644
--- a/vlib/x/ttf/common.v
+++ b/vlib/x/ttf/common.v
@@ -87,7 +87,7 @@ fn (mut bmp BitMap) format_texture() {
 // write out a .ppm file
 pub fn (mut bmp BitMap) save_as_ppm(file_name string) {
 	tmp_buf := bmp.buf
-	mut buf := unsafe { malloc(bmp.buf_size) }
+	mut buf := unsafe { malloc_noscan(bmp.buf_size) }
 	unsafe { C.memcpy(buf, tmp_buf, bmp.buf_size) }
 	bmp.buf = buf
 
diff --git a/vlib/x/ttf/render_sokol_cpu.v b/vlib/x/ttf/render_sokol_cpu.v
index 074842bc9b..c993250dba 100644
--- a/vlib/x/ttf/render_sokol_cpu.v
+++ b/vlib/x/ttf/render_sokol_cpu.v
@@ -56,7 +56,7 @@ pub fn (mut tf_skl TTF_render_Sokol) create_text(in_txt string, in_font_size f32
 			unsafe { free(tf_skl.bmp.buf) }
 		}
 		dprintln('create_text Alloc: $sz bytes')
-		tf_skl.bmp.buf = unsafe { malloc(sz) }
+		tf_skl.bmp.buf = unsafe { malloc_noscan(sz) }
 		tf_skl.bmp.buf_size = sz
 	}
 
@@ -94,7 +94,7 @@ pub fn (mut tf_skl TTF_render_Sokol) create_text_block(in_txt string, in_w int,
 			unsafe { free(tf_skl.bmp.buf) }
 		}
 		dprintln('Alloc: $sz bytes')
-		tf_skl.bmp.buf = unsafe { malloc(sz) }
+		tf_skl.bmp.buf = unsafe { malloc_noscan(sz) }
 		tf_skl.bmp.buf_size = sz
 	}