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_stackalloc

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This commit is contained in:
Antoni Piasecki
2026-05-30 21:01:01 +02:00
parent f181cfe675
commit 31b71a5e19
8 changed files with 46 additions and 37 deletions
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2
examples/chip8.zr
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@@ -36,7 +36,7 @@ func chip8_create[] : CHIP8
fonts := [0xf0, 0x90, 0x90, 0x90, 0xf0, 0x20, 0x60, 0x20, 0x20, 0x70, 0xf0, 0x10, 0xf0, 0x80, 0xf0, 0xf0, 0x10, 0xf0, 0x10, 0xf0, 0x90, 0x90, 0xf0, 0x10, 0x10, 0xf0, 0x80, 0xf0, 0x10, 0xf0, 0xf0, 0x80, 0xf0, 0x90, 0xf0, 0xf0, 0x10, 0x20, 0x40, 0x40, 0xf0, 0x90, 0xf0, 0x90, 0xf0, 0xf0, 0x90, 0xf0, 0x10, 0xf0, 0xf0, 0x90, 0xf0, 0x90, 0x90, 0xe0, 0x90, 0xe0, 0x90, 0xe0, 0xf0, 0x80, 0x80, 0x80, 0xf0, 0xe0, 0x90, 0x90, 0x90, 0xe0, 0xf0, 0x80, 0xf0, 0x80, 0xf0, 0xf0, 0x80, 0xf0, 0x80, 0x80]
for i in 0..80
c->memory[i] = array.nth(fonts, i)
mem.free(fonts)
array.free(fonts)
c->pc = 0x200

2
examples/puzzles/aoc2024_04.zr
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@@ -43,7 +43,7 @@ func part2[lines: Array] : void
for x in 1..lines->size-1
for y in 1..str.len(array.nth(lines, x))-1
if array.nth(lines, x)[y] == 'A'
s := mem.alloc(5) as str
s := _stackalloc(5) as str
s[0] = array.nth(lines, x - 1)[y - 1]
s[1] = array.nth(lines, x + 1)[y - 1]
s[2] = array.nth(lines, x + 1)[y + 1]

2
examples/puzzles/aoc2025_03.zr
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@@ -7,7 +7,7 @@ func part1[lines: Array] : void
largest := 0
for j in 0..str.len(line)
for k in (j+1)..str.len(line)
s := mem.alloc(3) as str
s := _stackalloc(3) as str
s[0] = line[j]
s[1] = line[k]
s[2] = 0

2
examples/tcp_server.zr
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@@ -6,7 +6,7 @@ func main[] : i64
io.println("Listening on port 8000...")
resp := mem.alloc(60000)
addr := mem.alloc(16)
addr := _stackalloc(16)
while true
conn := net.accept(s, addr)
if conn < 0

11
src/codegen_x86_64.rs
View File

@@ -645,6 +645,17 @@ _builtin_environ:
return self.emit_var_arg(env, &args[0]);
}
if let ExprKind::Variable(callee_name) = &callee.kind
&& callee_name.lexeme == "_stackalloc"
{
self.compile_expr(env, &args[0])?;
emit!(&mut self.output, " add rax, 15");
emit!(&mut self.output, " and rax, -16");
emit!(&mut self.output, " sub rsp, rax");
emit!(&mut self.output, " mov rax, rsp");
return Ok(());
}
for arg in args {
self.compile_expr(env, arg)?;
emit!(&mut self.output, " push rax");

16
src/std/net.zr
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@@ -4,6 +4,10 @@ const SOCK_DGRAM = 2
const SOL_SOCKET = 1
const SO_REUSEADDR = 2
const DNS_TYPE_A = 1
const DNS_CLASS_IN = 1
const DNS_RECURSION_DESIRED = 256
func net.listen[packed_host: i64, port: i64] : i64, bool
s := _builtin_syscall(SYS_socket, AF_INET, SOCK_STREAM, 0)
if s < 0
@@ -14,7 +18,7 @@ func net.listen[packed_host: i64, port: i64] : i64, bool
_builtin_syscall(SYS_close, s)
return -1, false
sa := mem.alloc(16)
sa := _stackalloc(16)
mem.zero(sa, 16)
sa[0] = 2
sa[1] = 0
@@ -27,9 +31,7 @@ func net.listen[packed_host: i64, port: i64] : i64, bool
if _builtin_syscall(SYS_bind, s, sa, 16) < 0
_builtin_syscall(SYS_close, s)
mem.free(sa)
return -1, false
mem.free(sa)
if _builtin_syscall(SYS_listen, s, 128) < 0
_builtin_syscall(SYS_close, s)
@@ -42,7 +44,7 @@ func net.connect[packed_host: i64, port: i64] : i64, bool
if s < 0
return -1, false
sa := mem.alloc(16)
sa := _stackalloc(16)
mem.zero(sa, 16)
sa[0] = AF_INET
sa[1] = 0
@@ -54,11 +56,9 @@ func net.connect[packed_host: i64, port: i64] : i64, bool
sa[7] = packed_host & 255
if _builtin_syscall(SYS_connect, s, sa, 16) < 0
mem.free(sa)
_builtin_syscall(SYS_close, s)
return -1, false
mem.free(sa)
return s, true
func net.accept[s: i64, addr: ptr] : i64
@@ -140,10 +140,6 @@ func net.UDPSocket.close_and_free[s: net.UDPSocket] : void
mem.free(s->addr)
mem.free(s)
const DNS_TYPE_A = 1
const DNS_CLASS_IN = 1
const DNS_RECURSION_DESIRED = 256
func net.encode_dns_name[domain: str] : Blob
domain_len := str.len(domain)
buf := Blob.alloc(domain_len + 2)

47
src/std/std.zr
View File

@@ -1,3 +1,16 @@
const S_IFDIR = 0o040000
const S_IFMT = 0o170000
const PROT_READ = 1
const PROT_WRITE = 2
const MAP_PRIVATE = 2
const MAP_ANONYMOUS = 32
const O_RDONLY = 0
const O_WRONLY = 1
const O_CREAT = 64
const O_TRUNC = 512
const SEEK_SET = 0
const SEEK_END = 2
func panic[msg: str] : void
io.print("PANIC: ")
io.println(msg)
@@ -36,10 +49,7 @@ func mem._request_space[size: i64] : mem.Block
needed := size + MEM_BLOCK_SIZE
alloc_size := (needed + 4095) & -4096
// PROT_READ | PROT_WRITE = 3
// MAP_PRIVATE | MAP_ANONYMOUS = 34
// fd = -1, offset = 0
blk := _builtin_syscall(SYS_mmap, 0, alloc_size, 3, 34, -1, 0) as mem.Block
blk := _builtin_syscall(SYS_mmap, 0, alloc_size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) as mem.Block
if (blk as ptr as i64) == -1
panic("mem._request_space: failed to mmap")
@@ -310,29 +320,22 @@ func Blob.free[buf: Blob] : void
func io.file_exists[path: str] : bool
return _builtin_syscall(SYS_faccessat, -100, path, 0, 0) == 0
const S_IFDIR = 0o040000
const S_IFMT = 0o170000
func io.is_a_directory[path: str] : bool
st := mem.alloc(256) // it has 21 mixed-size fields so no struct for now
st := _stackalloc(256) // it has 21 mixed-size fields so no struct for now
rc := _builtin_syscall(SYS_newfstatat, -100, path, st, 0)
if rc != 0
mem.free(st)
return false
out : bool = (mem.read32(st + 24) & S_IFMT) == S_IFDIR
mem.free(st)
return out
return (mem.read32(st + 24) & S_IFMT) == S_IFDIR
func io.read_text_file[path: str] : str, bool
fd := _builtin_syscall(SYS_openat, -100, path, 0, 0)
fd := _builtin_syscall(SYS_openat, -100, path, O_RDONLY, 0)
if fd < 0
return 0 as str, false
size := _builtin_syscall(SYS_lseek, fd, 0, 2)
_builtin_syscall(SYS_lseek, fd, 0, 0)
size := _builtin_syscall(SYS_lseek, fd, 0, SEEK_END)
_builtin_syscall(SYS_lseek, fd, 0, SEEK_SET)
buffer := mem.alloc(size + 1)
n := _builtin_syscall(SYS_read, fd, buffer, size)
@@ -369,7 +372,7 @@ func io.write_file[path: str, content: str] : bool
return io.write_binary_file(path, content as ptr, str.len(content))
func io.write_binary_file[path: str, content: ptr, size: i64] : bool
fd := _builtin_syscall(SYS_openat, -100, path, 0x241, 0o644)
fd := _builtin_syscall(SYS_openat, -100, path, O_WRONLY|O_CREAT|O_TRUNC, 0o644)
if fd < 0
return false
@@ -533,7 +536,7 @@ func str.from_i64[n: i64] : str
if n == -9223372036854775808
return str.make_copy("-9223372036854775808")
n = -n
buf := mem.alloc(21) as str // enough to fit -MAX_I64
buf := _stackalloc(21) as str // enough to fit -MAX_I64
end := 20
buf[end] = 0
end = end - 1
@@ -545,7 +548,6 @@ func str.from_i64[n: i64] : str
buf[end] = '-'
end = end - 1
s := str.make_copy((buf as ptr + end + 1) as str)
mem.free(buf)
return s
func str.hex_from_i64[n: i64] : str
@@ -558,7 +560,7 @@ func str.hex_from_i64[n: i64] : str
return out
mask := (1 << 60) - 1
buf := mem.alloc(17) as str
buf := _stackalloc(17) as str
len := 0
while n != 0
@@ -573,7 +575,6 @@ func str.hex_from_i64[n: i64] : str
j = j + 1
out[len] = 0
mem.free(buf)
return out
func str.from_char[c: u8] : str
@@ -928,7 +929,7 @@ func os.sleep[ms: i64] : void
func os.urandom[n: i64]: ptr
buffer := mem.alloc(n)
fd := _builtin_syscall(SYS_openat, -100, "/dev/urandom", 0, 0)
fd := _builtin_syscall(SYS_openat, -100, "/dev/urandom", O_RDONLY, 0)
if fd < 0
panic("os.urandom: failed to open /dev/urandom")
@@ -979,7 +980,7 @@ func os.run_shell_command[command: str] : i64, bool
return -(st & 0x7f), true
func os.list_directory[path: str] : Array, bool
fd := _builtin_syscall(SYS_openat, -100, path, 0, 0)
fd := _builtin_syscall(SYS_openat, -100, path, O_RDONLY, 0)
if fd < 0
return 0 as Array, false

1
src/symbol_table.rs
View File

@@ -54,6 +54,7 @@ impl SymbolTable {
("_builtin_syscall".into(), FnType::new_variadic("i64")),
("_builtin_environ".into(), FnType::new("ptr", vec![])),
("_var_arg".into(), FnType::new("any", vec!["i64"])),
("_stackalloc".into(), FnType::new("ptr", vec!["i64"])),
]),
constants: HashMap::new(),
structs: HashMap::new(),