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lib: extract rt module from os, sweep imports

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Hare puts runtime allocation in rt::, not os:: (ref/hare/rt/malloc.ha:27,
README). ww's `@symbol("rt_alloc") fn alloc(n: u64) *void;` lived at
lib/os/os.ww as a historical bootstrap shortcut; this commit relocates
it to a new lib/rt/malloc.ww and sweeps every site that depended on
`import os` for the alloc decl over to `import rt`.

This is commit 1 of 3 in the lib/rt extraction (#35):
  1. (this) move decl, sweep imports — preserves shape
  2. rename rt_alloc → rt_malloc (#38)
  3. nullable return type + OOM-propagating builtin lowering (#39)

No rename here. Symbol stays rt_alloc, function stays `alloc`, return
stays *void. Behavior identical — same ffi resolution outcome, just
sourced from a different module file. The rt::ensure runtime helper at
selfhost/rt/ensure.ww is its own compilation unit with a local decl and
is untouched.

Side effect: every wcc cgen file used `rt` as a local *node variable
name for "return type." `import rt;` shadows the module, so each
selfhost/cmd/wcc/{check,cgenstmt,cgenexpr,cgenutil}.ww site renamed
to `rtyp`. Mechanical follow-through; only the wcc module-import was
forced to do this rename.

Verified 132/132 + 995_self_rebuild byte-identity (5 wwstage tools
round-trip byte-identical).
This commit is contained in:
Hojun-Cho
2026-05-20 20:39:52 +09:00
parent a1ee817906
commit d68d3c7eb4
34 changed files with 530 additions and 488 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
selfhost/cmd/wcc/check.ww
View File

@@ -812,15 +812,15 @@ fn astoffset(c: *checker, dot: *node) i64 = {
if (dot.kind != nkind.N_DOT) { return -1i64; };
let recv: *node = scruttype(c, dot.lhs);
if (recv == nil) { return -1i64; };
let rt: *node = resolvealias(c, unwrapbang(recv));
if (rt == nil) { return -1i64; };
if (rt.kind == nkind.N_TPTR) {
rt = resolvealias(c, unwrapbang(rt.lhs));
let rtyp: *node = resolvealias(c, unwrapbang(recv));
if (rtyp == nil) { return -1i64; };
if (rtyp.kind == nkind.N_TPTR) {
rtyp = resolvealias(c, unwrapbang(rtyp.lhs));
};
if (rt == nil) { return -1i64; };
if (rt.kind != nkind.N_TSTRUCT) { return -1i64; };
if (rtyp == nil) { return -1i64; };
if (rtyp.kind != nkind.N_TSTRUCT) { return -1i64; };
let off: i64 = 0i64;
let f: *node = rt.list;
let f: *node = rtyp.list;
for (f != nil) {
if (f.kind == nkind.N_TFIELD) {
let fa: i64 = astalign(c, f.lhs);