/* * 937_forrange_fieldbase_run — #70: by-value for-range over a NON-IDENT * slice/str base (field chain, indexed element, call result). Pre-#70 * the range header stored cgexpr's AX — the DATA POINTER (slice cgexpr * leaves AX=ptr, BX=len, CX=cap) — into the single bound temp, and the * per-iteration code had no non-ident base arm, so the bound reload * doubled as the base: i was compared against the POINTER and the loop * walked off the end (regex.finish, SEGV on the first non-empty * charsets; empty slices coincidentally exited on ptr==0 — latent since * fold 1, BYTE-ID both stages, so the 989 M_ID gate held on * both-wrong-identical). Now: bound = len, base ptr spilled to its own * .rgb slot. Deref bases (*p — the #11 family, cgexpr does NOT deliver * the header) and non-ident ARRAY bases stay LOUD. * * row | shape | want * -------------------+----------------------------------------+----- * field_base | h.xs ([]i64) value + ptr root | 0 * field_base_24B | p.names ([]str) — the finish() shape | 0 * indexed_base | m[0] ([][]i64 element) | 0 * call_base | mk() ([]i64 call result) | 0 * empty_field | zero header field exits cleanly | 0 * eval_once | base reassigned INSIDE the loop — | * | header captured once (a per-iteration | * | re-read of the field would mis-sum) | 0 * reject_deref | *q base stays loud (#11) | err * reject_arr_field | h.arr ([3]i64 field) stays loud | err * * Every K_RUN row also asserts cstage/wwstage asm byte-id. NNN<950, * self-contained (/tmp, no imports). */ #include #include #include #include #include #include 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 drivers, exit==want, + cs==ww byte-id */ #define K_BUILDERR 1 /* build must FAIL with experr on BOTH drivers (rule 7) */ struct row { const char *label; const char *src; int want; int kind; const char *experr; }; /* errlog_has — a BUILDERR row must fail WITH its diagnostic; any other * failure (parse error, crash) 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[] = { { "field_base", "package main;\n" "type holder = struct { xs: []i64, name: str };\n" "fn mk() []i64 = {\n" " let xs: []i64;\n" " append(xs, 7);\n" " append(xs, 8);\n" " return xs;\n" "};\n" "export fn main() i32 = {\n" " let h: holder = holder { xs = mk(), name = \"h\" };\n" " let s1: i64 = 0;\n" " for (let v .. h.xs) { s1 += v; };\n" " if (s1 != 15) { return 1; };\n" " let p: *holder = &h;\n" " let s2: i64 = 0;\n" " for (let v .. p.xs) { s2 += v; };\n" " if (s2 != 15) { return 2; };\n" " return 0;\n" "};\n", 0, K_RUN, NULL }, /* 24B str-header elements through a ptr field — regex.finish's * exact shape (the live SEGV repro). */ { "field_base_24B", "package main;\n" "type bag = struct { names: []str, n: i64 };\n" "export fn main() i32 = {\n" " let names: []str;\n" " append(names, \"ab\");\n" " append(names, \"cde\");\n" " let b: bag = bag { names = names, n = 2 };\n" " let p: *bag = &b;\n" " let total: i64 = 0;\n" " for (let nm .. p.names) {\n" " total += (len(nm): i64);\n" " };\n" " if (total != 5) { return 1; };\n" " return 0;\n" "};\n", 0, K_RUN, NULL }, /* indexed element base — the task-#57 shape, graduated by #70 */ { "indexed_base", "package main;\n" "fn mk() []i64 = {\n" " let xs: []i64;\n" " append(xs, 7);\n" " append(xs, 8);\n" " return xs;\n" "};\n" "export fn main() i32 = {\n" " let m: [][]i64;\n" " append(m, mk());\n" " let s: i64 = 0;\n" " for (let v .. m[0]) { s += v; };\n" " if (s != 15) { return 1; };\n" " return 0;\n" "};\n", 0, K_RUN, NULL }, { "call_base", "package main;\n" "fn mk() []i64 = {\n" " let xs: []i64;\n" " append(xs, 7);\n" " append(xs, 8);\n" " return xs;\n" "};\n" "export fn main() i32 = {\n" " let s: i64 = 0;\n" " for (let v .. mk()) { s += v; };\n" " if (s != 15) { return 1; };\n" " return 0;\n" "};\n", 0, K_RUN, NULL }, /* zero header: the pre-#70 code exited only because ptr==0; the * fixed code must exit because len==0. */ { "empty_field", "package main;\n" "type holder = struct { xs: []i64, name: str };\n" "export fn main() i32 = {\n" " let h: holder = holder { name = \"e\", ... };\n" " for (let v .. h.xs) { return 1; };\n" " return 0;\n" "};\n", 0, K_RUN, NULL }, /* the range header (base ptr + len) is captured ONCE at loop * entry — Hare evaluates the range operand once. A fix that * re-read the field per iteration would walk b (sum 7+100) and * never see the reassign-then-original discipline. */ { "eval_once", "package main;\n" "type holder = struct { xs: []i64, n: i64 };\n" "export fn main() i32 = {\n" " let a: []i64;\n" " append(a, 7);\n" " append(a, 8);\n" " let b: []i64;\n" " append(b, 100);\n" " let h: holder = holder { xs = a, n = 0 };\n" " let s: i64 = 0;\n" " for (let v .. h.xs) {\n" " s += v;\n" " h.xs = b;\n" " };\n" " if (s != 15) { return 1; };\n" " if (len(h.xs) != 1) { return 2; };\n" " return 0;\n" "};\n", 0, K_RUN, NULL }, /* deref base: cgexpr on *p does not deliver the AX/BX/CX header * (the #11 deref-spine family) — pre-#70 it crashed or mis-summed * SILENTLY; now loud both stages. */ { "reject_deref", "package main;\n" "export fn main() i32 = {\n" " let xs: []i64;\n" " append(xs, 1);\n" " let q: *[]i64 = &xs;\n" " let s: i64 = 0;\n" " for (let v .. *q) { s += v; };\n" " return (s: i32);\n" "};\n", 0, K_BUILDERR, "for-range over a deref base unwired (#11)" }, /* non-ident ARRAY base: no base spill and a different cgexpr * register shape — loud (rule 7) until a consumer wires it. */ { "reject_arr_field", "package main;\n" "type holder = struct { arr: [3]i64, n: i64 };\n" "export fn main() i32 = {\n" " let h: holder = holder { arr = [1, 2, 3], n = 0 };\n" " let s: i64 = 0;\n" " for (let v .. h.arr) { s += v; };\n" " return (s: i32);\n" "};\n", 0, K_BUILDERR, "for-range over a non-ident array base unwired (#70)" }, }; /* build+run via a driver (ww / ww_ww); returns 0 pass, nonzero fail. */ static int run_driver(const char *driver, const struct row *r, int i) { char src[96], tmpdir[96], errf[96], cmd[1024]; snprintf(src, sizeof src, "/tmp/tfr_%d_%d.ww", getpid(), i); snprintf(tmpdir, sizeof tmpdir, "/tmp/tfr_%d_d_%d", getpid(), i); snprintf(errf, sizeof errf, "/tmp/tfr_%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 && %s build %s >/dev/null 2>%s", tmpdir, driver, src, errf); int brc = runwait(cmd); if (r->kind == K_BUILDERR) { int ok = (brc != 0) && (r->experr == NULL || errlog_has(errf, r->experr)); if (!ok) fprintf(stderr, "row[%s]: %s expected loud builderr " "\"%s\" (brc=%d)\n", r->label, driver, r->experr ? r->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 != r->want) { fprintf(stderr, "row[%s]: %s exit %d, want %d\n", r->label, driver, got, r->want); return 1; } return 0; } /* cs==ww .s byte-id (rule 10). */ 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/tfr_asm_%d_%d.ww", getpid(), i); snprintf(cs, sizeof cs, "/tmp/tfr_asm_%d_%d_c.s", getpid(), i); snprintf(ws, sizeof ws, "/tmp/tfr_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++; if (run_driver(cdrv, &rows[i], i) != 0) fail++; } if (access(wdrv, X_OK) == 0) { for (int i = 0; i < n; i++) { total++; if (run_driver(wdrv, &rows[i], i) != 0) fail++; } for (int i = 0; i < n; i++) { if (rows[i].kind == K_BUILDERR) continue; total++; if (asm_byte_identical(bin, &rows[i], i) != 0) fail++; } } if (fail) { fprintf(stderr, "forrange_fieldbase: %d/%d checks failed\n", fail, total); return 1; } printf("forrange_fieldbase: %d/%d ok\n", total, total); return 0; }