lib/fmt: add Option C parallel vstream API (#94 fold-e3)
Adds lib/fmt/vstream.ww with four new wrappers — fdprint_v / fdprintln_v / fdprintf_v / fdprintfln_v — that take a raw fd, stack- allocate an fd_ctx whose first field is `vt: io.vtable`, and dispatch through io.st_write on a vstream pointing at &c.vt (intrusive offset-0 cast — same shape as lib/memio/vstream.ww's fixed_ctx / dynamic_ctx in fold-e2). Coexists with the pre-vtable fdprint / fdprintln / fdprintf / fdprintfln in fmt.ww. ken's escape-risk discipline: every wrapper owns the fd_ctx slot for its frame only; the &c.vt vstream pointer is consumed inside the same function (passed through internal vfprint / vfprintf helpers) and never returned. Single tagged field (vt) lets the local default-zero plus chained `c.vt.X = …` assigns sidestep the multi-tagged-field copy drop (sibling #207) — no struct-lit init needed and c is a stack value, not an aliased pointer, so #195's chained-store carve-out doesn't bite either. Drew defer cited at the file head: io.handle (= file | int) is out-of-scope for this fold per fold-d/fold-e3 precedent; Hare's ref/hare/fmt/wrappers.ha:9-25 routes through the handle sum, and fdNNN_v collapses into bare fNNN_v once io fold-2 lands the port (filed inline as "io fold-2 handle port" backlog). Internal vfprint / vfprintf duplicate the per-arg and {n}- placeholder loops from fmt.ww (fprint:177, fprintf:676) because the OLD versions take *io.stream (the legacy struct) and fmt.ww stays UNCHANGED this fold. Shared bits — i64dec, modsinit, scandigits, scanmods, formattable, field, mods, fmtabort — are reused directly from fmt.ww. vformatfield mirrors the inline-per- arm dispatch shape OLD formatfield (fmt.ww:648) uses to dodge #18 silent miscompile of 24B return-by-value in for-loop context. Cast workaround per #206 at each vtable-fn-ptr-slot init (2 sites per wrapper, 8 total): bare `&fn_name` does not type-check as `(*<alias> | void)`. Same `(&fn): *io.<role>` cast shape that lib/memio/vstream.ww uses. Drops out wholesale when #206 closes. #173 workaround at fdsinkwrite_v: constructs nomem and widens to io.error explicitly rather than `os.trywrite(...)?` — same shape memio.vstream.ww line 71-74 note adopted. OLD fmt surface is UNCHANGED. fold-eFinal (task #50) atomically flips the package shape: deletes OLD wrappers + callbacks, renames _v suffix off, and migrates the few callers (with io fold-2's handle sum landing in the same flip). Probe test/wcc/777_fmt_vstream_run.c: 4 rows (fdprintf_v_int / fdprintln_v_multi / fdprint_v_raw / branched_fdprintf_v) open per-row /tmp output files, dispatch one V wrapper per row, reopen the file, read the bytes back, and assert both the exact byte content and a unique row-tagged exit constant. 4/4 fixtures total, all green via cstage. Cstage-only per row (no STAGE_WW, no byte_id) — pre-existing wwstage match-arm bug (sibling of #190, filed inline as #209): the wwstage checker bails `case: not a variant of scrutinee (X)` / `match: variant not handled (formattable)` on the OLD fmt.fdprint's match arms whenever any probe `import fmt;`s the package. The bug bites the OLD surface identically — even `fmt.errorln("hi")` from a probe trips the same trace. 970 fmttest dodges via cstage-only ww run; 995 self-rebuild dodges because no selfhost cmd transitively pulls fmt (err.ww imports fmt but no main.ww in cmd/{ww,w6c,w6a,w6l,wwdump} pulls err.ww in). Byte-id graduates when #209 closes — out-of-scope for the additive fold-e3. Combined.ww regen NO-OP: none of the five tracked combined.ww files (cmd/{ww,w6c,w6a,w6l,wwdump}/main.combined.ww) embed `package fmt;` — fmt is not in the dep graph of any selfhost binary. combined_ww_fresh stays green untouched. 210/210 tests passing (was 209; +1 for 777_fmt_vstream_run).
This commit is contained in:
397
test/wcc/777_fmt_vstream_run.c
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397
test/wcc/777_fmt_vstream_run.c
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@@ -0,0 +1,397 @@
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/*
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* 777_fmt_vstream_run — project #94 fold-e3 sentinel. Pins the
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* additive lib/fmt/vstream.ww Option C parallel API: stack-resident
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* fd_ctx with `vt: io.vtable` as the first field for the intrusive
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* vstream cast, four wrappers (fdprint_v / fdprintln_v / fdprintf_v /
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* fdprintfln_v) that take a raw fd, allocate fd_ctx on their own
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* frame (never escapes — ken's dispatcher-CONTAINED discipline), and
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* dispatch through io.st_write via the wired fdsinkwrite_v callback.
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* Coexists with the pre-vtable fdprint / fdprintln / fdprintf /
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* fdprintfln surface in fmt.ww (fold-eFinal, task #50, retires the
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* latter once io fold-2 ports `handle = (file | int)`).
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*
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* Each row imports fmt + os + io, opens a per-process /tmp output
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* file, calls one V wrapper to write through the fd, closes, re-
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* opens for read, reads the bytes back, and asserts both (a) the
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* exact byte content and (b) a unique row-tagged exit constant.
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*
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* Cstage-only per row (no STAGE_WW, no byte_id) — pre-existing
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* wwstage bug #209 (sibling of #190): the wwstage checker bails
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* `case: not a variant of scrutinee (X)` + `match: variant not
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* handled (formattable)` on the OLD fmt.fdprint / fdprintf's
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* match-on-formattable arms whenever a downstream probe `import
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* fmt;`s the package. The bug bites the OLD surface identically
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* — `fmt.errorln("hi")` from a probe trips the same trace. The
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* pre-existing surface (fmt.ww) is fine via cstage because every
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* other test that uses fmt is cstage-only (970 fmttest runs the
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* @test fixture under cstage `ww run` only). 995 self-rebuild
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* dodges it because no selfhost cmd imports fmt transitively —
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* fmt is consumed by selfhost/cmd/wcc/err.ww but no main.ww in
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* cmd/{ww,w6c,w6a,w6l,wwdump} pulls err.ww in. Fix-of-the-bug =
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* one-class checker repair, out-of-scope for the additive
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* fold-e3; closes the wwstage half here when it lands. Byte-id
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* graduates with #209 close.
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*
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* row | what it pins
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* --------------------------+--------------------------------------
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* fdprintf_v_int | fdprintf_v with `"v={}\n"`-style
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* | format + one i64 arg. Asserts the
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* | full intrusive shape (stack fd_ctx →
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* | &c.vt → io.st_write → fdsinkwrite_v
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* | → os.write) plus the {n}-placeholder
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* | parser routed through vformatfield.
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* fdprintln_v_multi | fdprintln_v with three positional
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* | args (i64 + str + bool). Asserts the
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* | space-separator + trailing newline
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* | shape mirrors OLD fdprintln (fmt.ww:
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* | 145), routed through io.st_write.
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* fdprint_v_raw | fdprint_v with one str arg, no
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* | format mods (zero-format raw). Pins
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* | the per-arg loop without the
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* | placeholder parser (vfprint code
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* | path, fmt/vstream.ww).
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* branched_fdprintf_v | branched callee per #105: two
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* | distinct format strings runtime-
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* | selected from a single fdprintf_v
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* | call site. Catches a constant-fold
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* | mistake in the format-string
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* | dispatch (mirror of 776's
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* | branched_fixed for the format-side).
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*
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* IMPORT-ORDER WORKAROUND (sibling task #208, pre-existing): every
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* row places `import os;` FIRST for the same reason 776 documents
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* (wwstage checker ordering-sensitivity on os.tryread/trywrite/
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* tryopen's bare `return r;` over a tagged return type).
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*
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* SIBLINGS (filed inline, NOT fixed here — fold-e3 is purely
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* additive over fold-e1/e2's frozen io.* + memio.* surface):
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*
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* - io fold-2 (handle port): drew-deferred per fold-d/fold-e3
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* precedent. Hare's ref/hare/fmt/wrappers.ha:9-25 routes through
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* io::handle; fdNNN_v collapses into bare fNNN_v once handle =
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* (file | int) lands. eFinal (#50) graduates.
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*
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* - #206 (bare &fn → (*alias|void)): 2 cast sites per wrapper
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* vtable wire-up; drop out wholesale on close.
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*
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* - #173 (TRY-on-tagged-return both-stages broken): fdsinkwrite_v
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* constructs nomem and widens to io.error explicitly rather
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* than using `os.trywrite(...)?`; same memio.vstream.ww shape.
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*
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* GATE POLARITY: must stay GREEN. A red here means vstream.ww
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* regressed, the stack fd_ctx → vstream cast miscomputed offsets,
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* the {n}-placeholder dispatch through vformatfield regressed, or
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* io.vtable's first-field embed lost its offset-0 invariant.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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static int
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runwait(const char *cmd)
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{
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int rc = system(cmd);
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if (rc == -1) return -1;
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if (WIFEXITED(rc)) return WEXITSTATUS(rc);
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return -1;
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}
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#define STAGE_CS 1
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#define STAGE_WW 2
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struct row {
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const char *label;
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const char *src;
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int want_exit;
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int stage_mask;
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int byte_id;
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};
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static const struct row rows[] = {
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{ "fdprintf_v_int",
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"package main;\n"
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"import os;\n"
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"import fmt;\n"
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"import io;\n"
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"export fn main() i32 = {\n"
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" let path: str = \"/tmp/wwfmtv_777_a\";\n"
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" let fd: i32 = os.open(path, os.flag.RDWR | os.flag.CREATE | os.flag.TRUNC, 0o644: i32);\n"
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" if (fd < 0) { return 90; };\n"
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" let wr = fmt.fdprintf_v(fd, \"v={}\\n\", 42i64);\n"
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" let nw: size = 0;\n"
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" match (wr) {\n"
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" case let n: size => { nw = n; };\n"
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" case io.error => { return 91; };\n"
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" };\n"
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" os.close(fd);\n"
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" let rd: i32 = os.open(path, os.flag.RDONLY, 0i32);\n"
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" if (rd < 0) { return 92; };\n"
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" let buf: [16]u8;\n"
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" let n: i64 = os.read(rd, &buf[0], 16u64);\n"
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" os.close(rd);\n"
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" if (n != 5i64) { return 93; };\n"
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" if (nw != 5: size) { return 94; };\n"
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" if (buf[0] != 118u8 || buf[1] != 61u8 || buf[2] != 52u8 || buf[3] != 50u8 || buf[4] != 10u8) { return 95; };\n"
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" return 42;\n"
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"};\n",
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42,
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STAGE_CS, 0 },
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{ "fdprintln_v_multi",
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"package main;\n"
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"import os;\n"
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"import fmt;\n"
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"import io;\n"
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"export fn main() i32 = {\n"
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" let path: str = \"/tmp/wwfmtv_777_b\";\n"
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" let fd: i32 = os.open(path, os.flag.RDWR | os.flag.CREATE | os.flag.TRUNC, 0o644: i32);\n"
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" if (fd < 0) { return 90; };\n"
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" let wr = fmt.fdprintln_v(fd, 7i64, \"hi\", true);\n"
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" let nw: size = 0;\n"
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" match (wr) {\n"
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" case let n: size => { nw = n; };\n"
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" case io.error => { return 91; };\n"
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" };\n"
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" os.close(fd);\n"
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" let rd: i32 = os.open(path, os.flag.RDONLY, 0i32);\n"
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" if (rd < 0) { return 92; };\n"
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" let buf: [16]u8;\n"
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" let n: i64 = os.read(rd, &buf[0], 16u64);\n"
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" os.close(rd);\n"
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" if (n != 10i64) { return 93; };\n"
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" if (nw != 10: size) { return 94; };\n"
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" if (buf[0] != 55u8 || buf[1] != 32u8 || buf[2] != 104u8 || buf[3] != 105u8 || buf[4] != 32u8 || buf[5] != 116u8 || buf[6] != 114u8 || buf[7] != 117u8 || buf[8] != 101u8 || buf[9] != 10u8) { return 95; };\n"
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" return 43;\n"
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"};\n",
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43,
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STAGE_CS, 0 },
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{ "fdprint_v_raw",
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"package main;\n"
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"import os;\n"
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"import fmt;\n"
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"import io;\n"
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"export fn main() i32 = {\n"
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" let path: str = \"/tmp/wwfmtv_777_c\";\n"
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" let fd: i32 = os.open(path, os.flag.RDWR | os.flag.CREATE | os.flag.TRUNC, 0o644: i32);\n"
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" if (fd < 0) { return 90; };\n"
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" let wr = fmt.fdprint_v(fd, \"raw\");\n"
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" let nw: size = 0;\n"
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" match (wr) {\n"
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" case let n: size => { nw = n; };\n"
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" case io.error => { return 91; };\n"
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" };\n"
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" os.close(fd);\n"
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" let rd: i32 = os.open(path, os.flag.RDONLY, 0i32);\n"
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" if (rd < 0) { return 92; };\n"
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" let buf: [8]u8;\n"
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" let n: i64 = os.read(rd, &buf[0], 8u64);\n"
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" os.close(rd);\n"
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" if (n != 3i64) { return 93; };\n"
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" if (nw != 3: size) { return 94; };\n"
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" if (buf[0] != 114u8 || buf[1] != 97u8 || buf[2] != 119u8) { return 95; };\n"
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" return 44;\n"
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"};\n",
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44,
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STAGE_CS, 0 },
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{ "branched_fdprintf_v",
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"package main;\n"
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"import os;\n"
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"import fmt;\n"
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"import io;\n"
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"export fn main() i32 = {\n"
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" let path: str = \"/tmp/wwfmtv_777_d\";\n"
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" let fd: i32 = os.open(path, os.flag.RDWR | os.flag.CREATE | os.flag.TRUNC, 0o644: i32);\n"
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" if (fd < 0) { return 90; };\n"
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" let sel: i32 = 1;\n"
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" let f1: str = \"A{}\";\n"
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" let f2: str = \"B{}\";\n"
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" let fmtstr: str = f1;\n"
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" if (sel == 0) { fmtstr = f2; };\n"
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" let wr = fmt.fdprintf_v(fd, fmtstr, 9i64);\n"
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" let nw: size = 0;\n"
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" match (wr) {\n"
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" case let n: size => { nw = n; };\n"
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" case io.error => { return 91; };\n"
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" };\n"
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" os.close(fd);\n"
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" let rd: i32 = os.open(path, os.flag.RDONLY, 0i32);\n"
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" if (rd < 0) { return 92; };\n"
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" let buf: [8]u8;\n"
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" let n: i64 = os.read(rd, &buf[0], 8u64);\n"
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" os.close(rd);\n"
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" if (n != 2i64) { return 93; };\n"
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" if (nw != 2: size) { return 94; };\n"
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" if (buf[0] != 65u8 || buf[1] != 57u8) { return 95; };\n"
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" return 45;\n"
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"};\n",
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45,
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STAGE_CS, 0 },
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};
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static int
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write_source(const char *path, const char *src)
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{
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FILE *f = fopen(path, "wb");
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if (!f) return -1;
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fputs(src, f);
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fclose(f);
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return 0;
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}
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/* Per-row tmpdir cleanup. ww_ww writes intermediates next to the
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* source (filed task #15), so each row's build leaves
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* <src>.{combined.ww,s,o} + bare exe alongside. Sweep all then
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* rmdir. Mirror of 776's cleanup_tmp. */
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static void
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cleanup_tmp(const char *tmpdir, const char *base)
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{
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char p[640];
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snprintf(p, sizeof p, "%s/%s.ww", tmpdir, base); unlink(p);
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snprintf(p, sizeof p, "%s/%s.s", tmpdir, base); unlink(p);
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snprintf(p, sizeof p, "%s/%s.o", tmpdir, base); unlink(p);
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snprintf(p, sizeof p, "%s/%s.combined.ww", tmpdir, base); unlink(p);
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snprintf(p, sizeof p, "%s/%s", tmpdir, base); unlink(p);
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rmdir(tmpdir);
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}
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static int
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build_via_driver(const char *driver, const char *tmpdir, const char *cwd,
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const char *src)
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{
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char cmd[2048];
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snprintf(cmd, sizeof cmd,
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"cd %s && timeout 180 %s build -I %s/lib %s 2>/dev/null",
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tmpdir, driver, cwd, src);
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return runwait(cmd);
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}
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static int
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run_row(const char *driver, const char *cwd, const struct row *r, int seq)
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{
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char tmpdir[256], src[512], base[64], outbin[768];
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snprintf(tmpdir, sizeof tmpdir, "/tmp/fvs_%d_d_%d", getpid(), seq);
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snprintf(base, sizeof base, "main777");
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snprintf(src, sizeof src, "%s/%s.ww", tmpdir, base);
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mkdir(tmpdir, 0755);
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if (write_source(src, r->src) != 0) { cleanup_tmp(tmpdir, base); return -1; }
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int rc;
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int br = build_via_driver(driver, tmpdir, cwd, src);
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if (br == 0) {
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snprintf(outbin, sizeof outbin, "%s/%s", tmpdir, base);
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rc = runwait(outbin);
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} else {
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rc = -1;
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}
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cleanup_tmp(tmpdir, base);
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return rc;
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}
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/* asm_byte_identical — diff cstage vs wwstage .s. Parallel trees so
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* ww_ww writing intermediates next to the source doesn't clobber the
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* cstage .s (CLAUDE.md rule 14 phase split). Mirror of 776's. */
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static int
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asm_byte_identical(const char *cdrv, const char *wdrv, const char *cwd,
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const struct row *r, int seq)
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{
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char src[512], tdc[256], tdw[256], base[64], cs[512], ws[512];
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snprintf(tdc, sizeof tdc, "/tmp/fvs_%d_c_%d", getpid(), seq);
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snprintf(tdw, sizeof tdw, "/tmp/fvs_%d_w_%d", getpid(), seq);
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snprintf(base, sizeof base, "main777");
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mkdir(tdc, 0755);
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mkdir(tdw, 0755);
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snprintf(src, sizeof src, "%s/%s.ww", tdc, base);
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if (write_source(src, r->src) != 0) { cleanup_tmp(tdc, base); cleanup_tmp(tdw, base); return -1; }
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int rc = -1;
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if (build_via_driver(cdrv, tdc, cwd, src) != 0) goto out;
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snprintf(cs, sizeof cs, "%s/%s.s", tdc, base);
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snprintf(src, sizeof src, "%s/%s.ww", tdw, base);
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if (write_source(src, r->src) != 0) goto out;
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if (build_via_driver(wdrv, tdw, cwd, src) != 0) goto out;
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snprintf(ws, sizeof ws, "%s/%s.s", tdw, base);
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FILE *fc = fopen(cs, "rb");
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FILE *fw = fopen(ws, "rb");
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if (fc && fw) {
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rc = 0;
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for (;;) {
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||||
int a = fgetc(fc);
|
||||
int b = fgetc(fw);
|
||||
if (a != b) { rc = -1; break; }
|
||||
if (a == EOF) break;
|
||||
}
|
||||
}
|
||||
if (fc) fclose(fc);
|
||||
if (fw) fclose(fw);
|
||||
out:
|
||||
cleanup_tmp(tdc, base);
|
||||
cleanup_tmp(tdw, base);
|
||||
return rc;
|
||||
}
|
||||
|
||||
int
|
||||
main(void)
|
||||
{
|
||||
const char *bin = getenv("BIN");
|
||||
if (!bin) bin = "out/bin";
|
||||
char cwd[256];
|
||||
if (getcwd(cwd, sizeof cwd) == NULL) return 1;
|
||||
char absbin[512];
|
||||
if (bin[0] != '/') {
|
||||
snprintf(absbin, sizeof absbin, "%s/%s", cwd, bin);
|
||||
bin = absbin;
|
||||
}
|
||||
|
||||
char cdrv[640], wdrv[640];
|
||||
snprintf(cdrv, sizeof cdrv, "%s/ww", bin);
|
||||
snprintf(wdrv, sizeof wdrv, "%s/ww_ww", bin);
|
||||
|
||||
int n = (int)(sizeof rows / sizeof rows[0]);
|
||||
int total = 0, fail = 0;
|
||||
int wwpresent = (access(wdrv, X_OK) == 0);
|
||||
int seq = 0;
|
||||
|
||||
for (int i = 0; i < n; i++) {
|
||||
if (rows[i].stage_mask & STAGE_CS) {
|
||||
total++;
|
||||
int got = run_row(cdrv, cwd, &rows[i], seq++);
|
||||
if (got != rows[i].want_exit) {
|
||||
fprintf(stderr,
|
||||
"fmt_vstream_run[cs][%s]: exit=%d want=%d\n",
|
||||
rows[i].label, got, rows[i].want_exit);
|
||||
fail++;
|
||||
}
|
||||
}
|
||||
if (wwpresent && (rows[i].stage_mask & STAGE_WW)) {
|
||||
total++;
|
||||
int got = run_row(wdrv, cwd, &rows[i], seq++);
|
||||
if (got != rows[i].want_exit) {
|
||||
fprintf(stderr,
|
||||
"fmt_vstream_run[ww][%s]: exit=%d want=%d\n",
|
||||
rows[i].label, got, rows[i].want_exit);
|
||||
fail++;
|
||||
}
|
||||
if (rows[i].byte_id) {
|
||||
total++;
|
||||
if (asm_byte_identical(cdrv, wdrv, cwd, &rows[i], seq++) != 0) {
|
||||
fprintf(stderr,
|
||||
"fmt_vstream_run[byte-id][%s]: cstage vs wwstage asm differs\n",
|
||||
rows[i].label);
|
||||
fail++;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (!wwpresent)
|
||||
fprintf(stderr, "fmt_vstream_run: skip wwstage (no %s)\n", wdrv);
|
||||
|
||||
if (fail) {
|
||||
fprintf(stderr, "fmt_vstream_run: %d/%d fixtures failed\n",
|
||||
fail, total);
|
||||
return 1;
|
||||
}
|
||||
printf("fmt_vstream_run: %d/%d ok\n", total, total);
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user