ww/test/wcc/944_alias_emit_b7_run.c

/*
 * 944_alias_emit_b7_run — #5 alias arc B7 (finale): the four cgen.c
 * static-DATA emitter ELEM-type chases. All four sites already chased
 * the OUTER type; the residual single peel was on the ELEMENT type
 * (u->sub), so a 2-level-elem-alias global missed the TY_STRUCT /
 * TY_STR / TY_TAGGED kind tests and fell off the foldable-literal
 * path. cs-only: every graduation is a cs-side flip onto ww's
 * already-correct emit (align cs UP); _ww binaries bit-identical
 * across the commit (comment-only ww annotation bytes are
 * codegen-inert).
 *
 * Sites (numbering at 05f7af7): emit_array_lit_bytes:14356 (struct
 * arm + raw-bytes path), emit_strarray_data:14574 (str DATAW+DATAR
 * rows), emit_slice_data:14788 (3-way slice-of-{str,slice,tagged}
 * fatal), let_pre_intern:15088 (the :14574 row's label-order leg —
 * MUST chase in the same commit or _S_ labels intern in emit order,
 * not decl order; strarr_2lvl's byte-id IS the coupling proof).
 *
 * Row sources: ken's B7 first-position oracle (/tmp/ken_b5/src/kb7_*,
 * .ai/ken-b7-oracle.md, matrix at 05f7af7) + impl pre-state probes.
 * NOTE: `type el = el0` where el0 is itself a type decl is ALREADY two
 * NAMED layers (NAMED(el)→NAMED(el0)→struct), so the "_1lvl" struct
 * spelling graduates with the 2-level rows; only a direct alias of a
 * primitive (type ms = str) is a true single layer.
 *
 *   row                | shape                                | cs/ww
 *   -------------------+--------------------------------------+------
 *   sarr_2lvl          | kb7_sarr [2]el 2-lvl alias struct    |
 *                      | elem: cs emitted NO DATA (eu peel    |
 *                      | missed TY_STRUCT → return 0 → caller |
 *                      | skipped the def) → link-loud. LIVE   |
 *                      | graduation → 0/0 byte-id             | 0/0
 *   sarr_1lvl          | [2]el, el = el0 — two NAMED layers   |
 *                      | by construction; same graduation     | 0/0
 *   sarr_plain_ctl     | kb7_sarr0 [2]el0 control             | 0/0
 *   sarr_unref_2lvl    | NEVER-REFERENCED 2-lvl-elem global:  |
 *                      | pre-B7 cs silently lacked DATA (no   |
 *                      | reference → no link error → latent   |
 *                      | silence, ken's caveat). Closure pin: |
 *                      | byte-id vs ww (which always emitted) | 0/0
 *   strarr_2lvl        | kb7_strarr [2]ms 2-lvl alias str:    |
 *                      | eu != TY_STR → generic path can't    |
 *                      | fold strlits → link-loud. Graduation |
 *                      | + the :15088 intern-order coupling   | 0/0
 *   strarr_1lvl_ctl    | type ms = str — TRUE 1-level; worked |
 *                      | pre-B7, byte-NEUTRAL regression net  | 0/0
 *   strarr_plain_ctl   | kb7_strarr0 [2]str control           | 0/0
 *   scalararr_2lvl     | [3]my64b raw-bytes path: scalar fold |
 *                      | never consulted eu — worked pre-B7,  |
 *                      | byte-NEUTRAL regression net          | 0/0
 *   slc_2lvl           | kb7_slc []my64b: cs ok (synthesized- |
 *                      | array choke-point + mirrored esz),   |
 *                      | ww checker-rejects ALL slice-literal |
 *                      | globals ("let: not assignable",      |
 *                      | pre-existing acceptance divergence,  |
 *                      | #66-R2/#29 kin) — ww cell MUST NOT   |
 *                      | move across B7                       | 0/err
 *   slc_plain_ctl      | kb7_slc0 []i64 — same split          | 0/err
 *   slcstr_2lvl        | kb7_slcstr []ms: pre-B7 the alias    |
 *                      | ESCAPED the 3-way fatal and hit the  |
 *                      | downstream "not a foldable constant" |
 *                      | — loud but WRONG DIAGNOSTIC. Post:   |
 *                      | the intended 3-way text (== control) | err/err
 *   slcstr_plain_ctl   | kb7_slcstr0 []str pins the 3-way     |
 *                      | text on the control                  | err/err
 *   slctag_2lvl        | []u1 2-lvl alias tagged elem: pre-B7 |
 *                      | the alias DODGED the 3-way fatal     |
 *                      | ENTIRELY — silent accept + run       |
 *                      | (wrong-DATA latency). DESIGNED       |
 *                      | NARROWING: post-B7 louds with the    |
 *                      | 3-way text ("widen what the gate     |
 *                      | SEES", B6-c2 fsarg2 precedent)       | err/err
 *   slcslc_2lvl        | []ms (ms = []i64): nested slice-lit  |
 *                      | rejected UPSTREAM by the cs checker  |
 *                      | ("let G init not assignable") — the  |
 *                      | TY_SLICE arm of the 3-way is not     |
 *                      | reachable via a literal; pin the     |
 *                      | checker bound (alias-independent)    | err/err
 *
 * K_RUN rows build+run BOTH drivers (exit==want) and assert cs/ww asm
 * byte-id. K_BUILDERR rows must FAIL with experr on BOTH drivers;
 * experr_ww overrides the ww text when the stages loud at different
 * sites. K_CSRUN_WWERR rows run on the cs driver and must FAIL with
 * experr_ww on the ww driver (ken's observation cells; byte-id N/A).
 * 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 */
#define K_CSRUN_WWERR  2	/* cs builds+runs (exit==cswant); ww must
				 * FAIL with experr_ww (pre-existing
				 * acceptance divergence cell); byte-id
				 * N/A — ww emits nothing */

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;
}

#define ERR_3WAY "slice-of-{str,slice,tagged} literal static-init unsupported"
#define ERR_WWLET "let: not assignable"

static const struct row rows[] = {
	/* ---- emit_array_lit_bytes struct arm (:14356) */
	{ "sarr_2lvl",
	  "package main;\n"
	  "type el0 = struct { a: i64, b: i64 };\n"
	  "type el1 = el0;\n"
	  "type el = el1;\n"
	  "let G: [2]el = [el0 { a = 1, b = 2 }, el0 { a = 3, b = 4 }];\n"
	  "export fn main() i32 = {\n"
	  "	if (G[0].a + G[0].b + G[1].a + G[1].b != 10) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
	{ "sarr_1lvl",
	  "package main;\n"
	  "type el0 = struct { a: i64, b: i64 };\n"
	  "type el = el0;\n"
	  "let G: [2]el = [el0 { a = 1, b = 2 }, el0 { a = 3, b = 4 }];\n"
	  "export fn main() i32 = {\n"
	  "	if (G[0].a + G[0].b + G[1].a + G[1].b != 10) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
	{ "sarr_plain_ctl",
	  "package main;\n"
	  "type el0 = struct { a: i64, b: i64 };\n"
	  "let G: [2]el0 = [el0 { a = 1, b = 2 }, el0 { a = 3, b = 4 }];\n"
	  "export fn main() i32 = {\n"
	  "	if (G[0].a + G[0].b + G[1].a + G[1].b != 10) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
	/* Zero-consumer latent silence (ken's caveat): unreferenced, so
	 * the pre-B7 missing DATA never linked-loud — the byte-id cell
	 * vs ww (which always emitted the row) is the closure pin. */
	{ "sarr_unref_2lvl",
	  "package main;\n"
	  "type el0 = struct { a: i64, b: i64 };\n"
	  "type el1 = el0;\n"
	  "type el = el1;\n"
	  "let G: [2]el = [el0 { a = 1, b = 2 }, el0 { a = 3, b = 4 }];\n"
	  "export fn main() i32 = {\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
	/* ---- emit_strarray_data (:14574) + let_pre_intern (:15088) */
	{ "strarr_2lvl",
	  "package main;\n"
	  "type ms0 = str;\n"
	  "type ms = ms0;\n"
	  "let G: [2]ms = [\"aa\", \"bbb\"];\n"
	  "export fn main() i32 = {\n"
	  "	if (len(G[0]) != 2) { return 1; };\n"
	  "	if (len(G[1]) != 3) { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
	{ "strarr_1lvl_ctl",
	  "package main;\n"
	  "type ms = str;\n"
	  "let G: [2]ms = [\"aa\", \"bbb\"];\n"
	  "export fn main() i32 = {\n"
	  "	if (len(G[0]) != 2) { return 1; };\n"
	  "	if (len(G[1]) != 3) { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
	{ "strarr_plain_ctl",
	  "package main;\n"
	  "let G: [2]str = [\"aa\", \"bbb\"];\n"
	  "export fn main() i32 = {\n"
	  "	if (len(G[0]) != 2) { return 1; };\n"
	  "	if (len(G[1]) != 3) { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
	/* Raw-bytes scalar fold never consulted eu — byte-NEUTRAL net. */
	{ "scalararr_2lvl",
	  "package main;\n"
	  "type my64 = i64;\n"
	  "type my64b = my64;\n"
	  "let G: [3]my64b = [5, 6, 7];\n"
	  "export fn main() i32 = {\n"
	  "	if (G[0] + G[1] + G[2] != 18) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, 0, K_RUN, NULL, NULL },
	/* ---- emit_slice_data (:14788) — ken's ww observation cells
	 * (checker-rejects every slice-literal global) MUST NOT move. */
	{ "slc_2lvl",
	  "package main;\n"
	  "type my64 = i64;\n"
	  "type my64b = my64;\n"
	  "let G: []my64b = [5, 6, 7];\n"
	  "export fn main() i32 = {\n"
	  "	if (G[0] + G[1] + G[2] != 18) { return 1; };\n"
	  "	if (len(G) != 3) { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, 1, K_CSRUN_WWERR, NULL, ERR_WWLET },
	{ "slc_plain_ctl",
	  "package main;\n"
	  "let G: []i64 = [5, 6, 7];\n"
	  "export fn main() i32 = {\n"
	  "	if (G[0] + G[1] + G[2] != 18) { return 1; };\n"
	  "	if (len(G) != 3) { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, 1, K_CSRUN_WWERR, NULL, ERR_WWLET },
	/* Diagnostic-routing fix: pre-B7 the 2-lvl alias escaped the
	 * 3-way fatal onto the downstream "not a foldable constant"
	 * text — loud either way, wrong message. Post: == control. */
	{ "slcstr_2lvl",
	  "package main;\n"
	  "type ms0 = str;\n"
	  "type ms = ms0;\n"
	  "let G: []ms = [\"aa\", \"bbb\"];\n"
	  "export fn main() i32 = {\n"
	  "	if (len(G[0]) != 2) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 1, 1, K_BUILDERR, ERR_3WAY, ERR_WWLET },
	/* ww cell observed: plain []str PASSES the ww checker and louds
	 * at ww's own emitslicedata 3-way — the shared needle pins both
	 * stages' texts (cs "emit_slice_data:", ww "emitslicedata:");
	 * only ALIAS slice spellings reject at the ww checker. */
	{ "slcstr_plain_ctl",
	  "package main;\n"
	  "let G: []str = [\"aa\", \"bbb\"];\n"
	  "export fn main() i32 = {\n"
	  "	if (len(G[0]) != 2) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 1, 1, K_BUILDERR, ERR_3WAY, NULL },
	/* DESIGNED NARROWING: pre-B7 the tagged-elem alias dodged the
	 * 3-way fatal entirely — cs silently accepted and ran (wrong-
	 * DATA latency). The chase widens what the gate SEES (B6-c2
	 * fsarg2 precedent); the loud stays loud for what it guards. */
	{ "slctag_2lvl",
	  "package main;\n"
	  "type u0 = (void | i64);\n"
	  "type u1 = u0;\n"
	  "let G: []u1 = [1i64, 2i64];\n"
	  "export fn main() i32 = {\n"
	  "	if (len(G) != 2) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 1, 1, K_BUILDERR, ERR_3WAY, ERR_WWLET },
	/* Slice-of-slice literal never reaches the emitter: the cs
	 * checker bounds it upstream, alias-independent. Pin the bound
	 * so a checker widening re-opens this row deliberately. */
	{ "slcslc_2lvl",
	  "package main;\n"
	  "type ms0 = []i64;\n"
	  "type ms = ms0;\n"
	  "let G: []ms = [[1, 2], [3]];\n"
	  "export fn main() i32 = {\n"
	  "	if (len(G) != 2) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 1, 1, K_BUILDERR, "let G init not assignable", ERR_WWLET },
};

static int
run_driver(const char *driver, const struct row *r, int i, int expect_err,
    int want, const char *experr)
{
	char tmpdir[96], src[160], outbin[160], errf[160], rmcmd[160], cmd[1024];
	snprintf(tmpdir, sizeof tmpdir, "/tmp/ab7_%d_d_%d", getpid(), i);
	mkdir(tmpdir, 0755);
	snprintf(src,    sizeof src,    "%s/ab7_%d_%d.ww", tmpdir, getpid(), i);
	snprintf(outbin, sizeof outbin, "%s/ab7_%d_%d",    tmpdir, getpid(), i);
	snprintf(errf,   sizeof errf,   "%s/err",          tmpdir);
	snprintf(rmcmd,  sizeof rmcmd,  "rm -rf %s", tmpdir);

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

	snprintf(cmd, sizeof cmd,
	    "timeout 20 %s build -o %s %s >/dev/null 2>%s",
	    driver, outbin, 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);
		runwait(rmcmd);
		return ok ? 0 : 1;
	}
	if (brc != 0) {
		fprintf(stderr, "row[%s]: build via %s failed\n",
		    r->label, driver);
		runwait(rmcmd);
		return -1;
	}

	int got = runwait(outbin);

	runwait(rmcmd);
	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/ab7_asm_%d_%d.ww", getpid(), i);
	snprintf(cs,  sizeof cs,  "/tmp/ab7_asm_%d_%d_c.s", getpid(), i);
	snprintf(ws,  sizeof ws,  "/tmp/ab7_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
			    || rows[i].kind == K_CSRUN_WWERR;
			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_emit_b7: %d/%d checks failed\n",
		    fail, total);
		return 1;
	}
	printf("alias_emit_b7: %d/%d ok\n", total, total);
	return 0;
}