ww/test/wcc/944_alias_cgen_b6_run.c

/*
 * 944_alias_cgen_b6_run — #5 alias arc F2b (B6 train): the cgen.c
 * cgexpr/cgstmt INLINE single-peel sweep through type_chase_named, by
 * consumer family — c1 assign/reassign (9 lines), c2 call-arg (8),
 * c3 addr-of/field-walk/index spine (14), c4 cast/is/try (10),
 * c5 reads/len/globals (8). All cs-only: every graduation is a
 * DIVERGE→byte-id flip (cs aligns UP to ww's already-chasing asm);
 * zero selfhost/lib bytes move across the train, so the _ww binaries
 * stay bit-identical (the crossing detector).
 *
 * Row sources are ken's B6 first-position oracle probes
 * (/tmp/ken_b5/src/kb6_*, .ai/ken-b6-oracle.md, matrix at 4cac1cb).
 *
 *   row                 | shape (oracle row)                  | cs/ww
 *   --------------------+-------------------------------------+------
 *   ---- c1 (assign/reassign: :6359 :6403/:6405 :6460/:6462 -------
 *        :6518 + cgstmt :11696 :12047 :13625) -------------------
 *   streassign_2lvl     | kb6_streassign: 2-lvl alias str     |
 *                       | reassign `b = a` — cs copied WORD0  |
 *                       | (ptr) ONLY, len/cap stale (silent   |
 *                       | exit 1); the :6518 lu gate fell to  |
 *                       | the scalar default. LIVE graduation | 0/0
 *   wstore_a (B5 file)  | kb5_wstore_a graduates K_RUN_NOID → |
 *                       | K_RUN in 944_alias_cgen_b5_run.c —  |
 *                       | the ident-lhs N_ASSIGN tagged gate  |
 *                       | (:6359) was the divergence (ken     |
 *                       | C1-CORR-2, he owns the flip)        | 0/0
 *   sreassign_2lvl      | kb6_sreassign: whole-struct alias   |
 *                       | reassign — latent control           | 0/0
 *   dassign_2lvl        | kb6_dassign: (*p).f= over alias ptr |
 *                       | — latent control                    | 0/0
 *   ---- c2 (call-arg: :8402 :8435 :8561/:8563/:8577/:8579 --------
 *        + LOUD-PRESERVING :8829 :8934) ------------------------
 *   fsarg0_loud_ctl     | kb6_fsarg0: PLAIN float-struct from |
 *                       | a non-ident source — #271/#165 loud |
 *                       | BOTH stages (control, twin texts)   | err/err
 *   fsarg2_bound        | kb6_fsarg2: 1-alias-level respell — |
 *                       | pre-c2 the :8829 single-peel let    |
 *                       | the alias DODGE the fatal; cs GP-   |
 *                       | passed by self-consistent luck.     |
 *                       | DESIGNED NARROWING: cs now louds    |
 *                       | with the pinned #271/#165 text      |
 *                       | ("widen what the gate SEES, never   |
 *                       | what it ACCEPTS"). ww's loud is its |
 *                       | own alias-return bound (#272/#277   |
 *                       | class, experr_ww) — per-stage texts | err/err
 *   fsarg_ident_ctl     | kb6_fsarg: IDENT-source alias twin  |
 *                       | — ident domain out of the :8829     |
 *                       | gate, latent control                | 0/0
 *   sarg_2lvl           | kb6_sarg: >16B alias struct arg —   |
 *                       | latent (B5 helper chases carry the  |
 *                       | type layer)                         | 0/0
 *   strarg_2lvl         | kb6_strarg: alias str arg — latent  | 0/0
 *   (:8934 tuple loud is WATCH-ONLY: alias spellings are       |
 *    checker-blocked upstream (#86/#99) — the pin is the b5    |
 *    suite's tuparg_cast_bound99 two-key cells, which must     |
 *    not move.)                                                |
 *
 * K_RUN rows build+run BOTH drivers (cs exit==cswant, ww exit==wwwant)
 * and assert cstage/wwstage asm byte-id. K_BUILDERR rows must FAIL
 * with experr on BOTH drivers; experr_ww overrides the ww-side text
 * when the two stages loud at DIFFERENT sites (per-stage texts).
 * NNN<950, self-contained /tmp sources, no imports (944 precedent).
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/wait.h>

static int
runwait(const char *cmd)
{
	int rc = system(cmd);
	if (rc == -1) return -1;
	if (WIFEXITED(rc)) return WEXITSTATUS(rc);
	return -1;
}

static int
slurp_eq(const char *a, const char *b)
{
	FILE *fa = fopen(a, "rb");
	FILE *fb = fopen(b, "rb");
	if (!fa || !fb) { if (fa) fclose(fa); if (fb) fclose(fb); return -1; }
	int rc = 0;
	for (;;) {
		int ca = fgetc(fa), cb = fgetc(fb);
		if (ca != cb) { rc = -1; break; }
		if (ca == EOF) break;
	}
	fclose(fa); fclose(fb);
	return rc;
}

#define K_RUN          0	/* build+run BOTH, exits==wants, + byte-id */
#define K_BUILDERR     1	/* build FAILS with experr on BOTH drivers;
				 * experr_ww overrides the ww-side text */

struct row { const char *label; const char *src;
             int cswant; int wwwant; int kind;
             const char *experr; const char *experr_ww; };

/* errlog_has — a builderr cell must fail WITH its diagnostic; any other
 * failure (parse error, crash, hang-kill) is a vacuous reject (940
 * precedent). */
static int
errlog_has(const char *path, const char *needle)
{
	FILE *f = fopen(path, "rb");
	if (!f) return 0;
	char buf[8192];
	size_t got = fread(buf, 1, sizeof buf - 1, f);
	fclose(f);
	buf[got] = '\0';
	return strstr(buf, needle) != NULL;
}

static const struct row rows[] = {
	/* ---- c1: assign/reassign family */
	/* LIVE c1 graduation: the :6518 reassign gate single-peeled the
	 * 2-level alias str lhs, missed the TY_STR kind test, and fell
	 * to the scalar default — ONE MOVQ stored the ptr word, len/cap
	 * kept the dead value's header (cs silent exit 1, ww correct:
	 * full 3-word {ptr,len,cap} store, Hare value semantics). */
	{ "streassign_2lvl",
	  "package main;\n"
	  "type ms0 = str;\n"
	  "type ms = ms0;\n"
	  "export fn main() i32 = {\n"
	  "	let a: ms = \"hello\";\n"
	  "	let b: ms = \"x\";\n"
	  "	b = a;\n"
	  "	if (len(b) != 5) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
	{ "sreassign_2lvl",
	  "package main;\n"
	  "type st0 = struct { a: i64, b: i64, c: i64 };\n"
	  "type st = st0;\n"
	  "export fn main() i32 = {\n"
	  "	let x: st; x.a = 1; x.b = 2; x.c = 3;\n"
	  "	let y: st; y.a = 0; y.b = 0; y.c = 0;\n"
	  "	y = x;\n"
	  "	if (y.c != 3 || y.b != 2) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
	{ "dassign_2lvl",
	  "package main;\n"
	  "type st0 = struct { a: i64, b: i64 };\n"
	  "type st = st0;\n"
	  "export fn main() i32 = {\n"
	  "	let x: st; x.a = 1; x.b = 2;\n"
	  "	let p: *st = &x;\n"
	  "	(*p).b = 9;\n"
	  "	if (x.b != 9) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
	/* ---- c2: call-arg family */
	{ "fsarg0_loud_ctl",
	  "package main;\n"
	  "type fs0 = struct { x: f64 };\n"
	  "fn mk() fs0 = {\n"
	  "	let s: fs0; s.x = 2.5;\n"
	  "	return s;\n"
	  "};\n"
	  "fn g(p: fs0) f64 = { return p.x; };\n"
	  "export fn main() i32 = {\n"
	  "	if (g(mk()) != 2.5) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_BUILDERR,
	  "#271/#165: float-bearing struct arg from a non-ident source",
	  NULL },
	/* DESIGNED ACCEPTANCE NARROWING (B6-c2): pre-c2 cs accepted and
	 * GP-passed this float struct correct-by-self-consistent-luck
	 * (caller+callee agreed on the wrong transport) — the :8829
	 * single peel let a 1-level alias dodge the rule-7 fatal. The
	 * chase widens what the gate SEES; the loud stays loud for the
	 * shapes it guards. ww's cell was ALREADY loud at its own
	 * alias-return bound (#272/#276/#277 class) — different site,
	 * per-stage experr. */
	{ "fsarg2_bound",
	  "package main;\n"
	  "type fs0 = struct { x: f64 };\n"
	  "type fs = fs0;\n"
	  "fn mk() fs = {\n"
	  "	let s: fs; s.x = 2.5;\n"
	  "	return s;\n"
	  "};\n"
	  "fn g(p: fs) f64 = { return p.x; };\n"
	  "export fn main() i32 = {\n"
	  "	if (g(mk()) != 2.5) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_BUILDERR,
	  "#271/#165: float-bearing struct arg from a non-ident source",
	  "#272/#276/#277: aggregate return reaches scalar default" },
	{ "fsarg_ident_ctl",
	  "package main;\n"
	  "type fs0 = struct { x: f64 };\n"
	  "type fs = fs0;\n"
	  "fn mk() fs0 = {\n"
	  "	let s: fs0; s.x = 2.5;\n"
	  "	return s;\n"
	  "};\n"
	  "fn g(p: fs) f64 = { return p.x; };\n"
	  "export fn main() i32 = {\n"
	  "	let v: fs = mk();\n"
	  "	if (g(v) != 2.5) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
	{ "sarg_2lvl",
	  "package main;\n"
	  "type big0 = struct { a: i64, b: i64, c: i64 };\n"
	  "type big = big0;\n"
	  "fn g(p: big) i64 = { return p.a + p.c; };\n"
	  "export fn main() i32 = {\n"
	  "	let s: big; s.a = 4; s.b = 5; s.c = 9;\n"
	  "	if (g(s) != 13) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
	{ "strarg_2lvl",
	  "package main;\n"
	  "type ms0 = str;\n"
	  "type ms = ms0;\n"
	  "fn g(s: ms) i64 = { return len(s): i64; };\n"
	  "export fn main() i32 = {\n"
	  "	let a: ms = \"hello\";\n"
	  "	if (g(a) != 5) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
};

static int
run_driver(const char *driver, const struct row *r, int i, int expect_err,
    int want, const char *experr)
{
	char src[96], tmpdir[96], errf[96], cmd[1024];
	snprintf(src, sizeof src, "/tmp/ab6_%d_%d.ww", getpid(), i);
	snprintf(tmpdir, sizeof tmpdir, "/tmp/ab6_%d_d_%d", getpid(), i);
	snprintf(errf, sizeof errf, "/tmp/ab6_%d_e_%d", getpid(), i);

	FILE *f = fopen(src, "wb");
	if (!f) return -1;
	fputs(r->src, f);
	fclose(f);

	mkdir(tmpdir, 0755);
	snprintf(cmd, sizeof cmd,
	    "cd %s && timeout 20 %s build %s >/dev/null 2>%s",
	    tmpdir, driver, src, errf);
	int brc = runwait(cmd);
	if (expect_err) {
		int ok = (brc != 0)
		    && (experr == NULL || errlog_has(errf, experr));
		if (!ok)
			fprintf(stderr, "row[%s]: %s expected loud builderr "
			    "\"%s\" (brc=%d)\n", r->label, driver,
			    experr ? experr : "", brc);
		unlink(src); unlink(errf); rmdir(tmpdir);
		return ok ? 0 : 1;
	}
	if (brc != 0) {
		fprintf(stderr, "row[%s]: build via %s failed\n",
		    r->label, driver);
		unlink(src); unlink(errf); rmdir(tmpdir);
		return -1;
	}

	const char *base = strrchr(src, '/');
	base = base ? base + 1 : src;
	char outbin[256];
	snprintf(outbin, sizeof outbin, "%s/%s", tmpdir, base);
	char *dot = strrchr(outbin, '.');
	if (dot && strcmp(dot, ".ww") == 0) *dot = '\0';
	int got = runwait(outbin);

	unlink(src); unlink(outbin); unlink(errf); rmdir(tmpdir);
	if (got != want) {
		fprintf(stderr, "row[%s]: %s exit %d, want %d\n",
		    r->label, driver, got, want);
		return 1;
	}
	return 0;
}

static int
asm_byte_identical(const char *bin, const struct row *r, int i)
{
	char src[96], cs[96], ws[96], cmd[1024];
	snprintf(src, sizeof src, "/tmp/ab6_asm_%d_%d.ww", getpid(), i);
	snprintf(cs,  sizeof cs,  "/tmp/ab6_asm_%d_%d_c.s", getpid(), i);
	snprintf(ws,  sizeof ws,  "/tmp/ab6_asm_%d_%d_w.s", getpid(), i);

	FILE *f = fopen(src, "wb");
	if (!f) return -1;
	fputs(r->src, f);
	fclose(f);

	snprintf(cmd, sizeof cmd, "%s/w6c -o %s %s 2>/dev/null", bin, cs, src);
	if (runwait(cmd) != 0) {
		fprintf(stderr, "row[%s]: w6c errored\n", r->label);
		unlink(src);
		return -1;
	}
	snprintf(cmd, sizeof cmd, "%s/w6c_ww -o %s %s 2>/dev/null",
	    bin, ws, src);
	if (runwait(cmd) != 0) {
		fprintf(stderr, "row[%s]: w6c_ww errored\n", r->label);
		unlink(src); unlink(cs);
		return -1;
	}
	int rc = slurp_eq(cs, ws);
	if (rc != 0)
		fprintf(stderr, "row[%s]: cstage vs wwstage asm differs\n",
		    r->label);
	unlink(src); unlink(cs); unlink(ws);
	return rc;
}

int
main(void)
{
	const char *bin = getenv("BIN");
	if (!bin) bin = "out/bin";
	char absbin[2080];
	if (bin[0] != '/') {
		char cwd[1024];
		if (getcwd(cwd, sizeof cwd) == NULL) return 1;
		snprintf(absbin, sizeof absbin, "%s/%s", cwd, bin);
		bin = absbin;
	}

	char cdrv[2120], wdrv[2120];
	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;

	for (int i = 0; i < n; i++) {
		total++;
		int cs_err = rows[i].kind == K_BUILDERR;
		if (run_driver(cdrv, &rows[i], i, cs_err,
		    rows[i].cswant, rows[i].experr) != 0) fail++;
	}
	if (access(wdrv, X_OK) == 0) {
		for (int i = 0; i < n; i++) {
			total++;
			int ww_err = rows[i].kind == K_BUILDERR;
			const char *we = rows[i].experr_ww
			    ? rows[i].experr_ww : rows[i].experr;
			if (run_driver(wdrv, &rows[i], i, ww_err,
			    rows[i].wwwant, we) != 0) fail++;
		}
		for (int i = 0; i < n; i++) {
			if (rows[i].kind != K_RUN)
				continue;
			total++;
			if (asm_byte_identical(bin, &rows[i], i) != 0) fail++;
		}
	}

	if (fail) {
		fprintf(stderr, "alias_cgen_b6: %d/%d checks failed\n",
		    fail, total);
		return 1;
	}
	printf("alias_cgen_b6: %d/%d ok\n", total, total);
	return 0;
}