/* * 817_arr_cap_reject — a fixed-size array has NO capacity word; `.cap` on an * array is INVALID ww and BOTH stages must LOUDLY REJECT at check time * (GAP-A.cap, task #12; drew ruling .ai/drew-gapa-ptr-ruling.md). `.len` * (GAP-A.len, 7b0e09e) AND `.ptr` (≡ &A[0], the sanctioned ww backing- * pointer spelling, task #13 divergence-record) stay VALID on an array — * only `.cap` is rejected. * * The bug (each stage misbehaved DIFFERENTLY on the same invalid construct, * hence both-stage): * - cstage check.c typed `.cap` on a TY_ARRAY as i32 → cgen then hard- * rejected with a generic "unsupported field-read shape" (loud but at * the WRONG layer, vague message). * - wwstage check.ww stamped `.cap` → cgen link-error (def-global * `A.cap` → w6l undefined 'cap') or SILENT garbage (local `a.cap`→30). * * The fix (BOTH checkers, one `.cap`-on-array gate each, byte-identical * diagnostic body): reject early with "no field 'cap' on a fixed-size array * (arrays have no capacity; use .len)". Checker-only: the reject makes the * buggy cgen `.cap` array paths unreachable (close by construction). * * Mutation-sanity: the genuinely-silent pre-fix case is wwstage's LOCAL * .cap, which BUILT and returned garbage (30) — neg_local_cap is the row * with real mutation power (built-ok pre-fix → caught here). The other * neg rows were already loud pre-fix but at the WRONG layer (cstage cgen * vague-reject on use; wwstage global link-error); this commit converges * all of them onto one early checker diagnostic. * * neg row | shape | gate * -----------------+----------------------------------------+---------- * neg_local_cap | local [3]int, a.cap | build FAIL * neg_def_cap | def A:[3]int, A.cap | build FAIL * neg_let_glob_cap | let G:[3]int (module), G.cap | build FAIL * neg_infer_cap | def A:[_]int, A.cap (#11 infer path) | build FAIL * * pos row | shape | want * -----------------+----------------------------------------+------ * pos_local_len | local [3]int, a.len | 3 * pos_def_len | def A:[_]int, A.len | 3 * pos_local_ptr | local [3]int, *a.ptr (sanctioned idiom) | 10 * * The pos_local_ptr row pins that `.ptr`-on-array stays VALID (cgen * unchanged in this commit; the def-global `.ptr` cgen fix + its build+run * pin are task #11 / test 818, NOT here — so this control uses a LOCAL * array `.ptr`, which is correct in both stages today). */ #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; } struct row { const char *label; const char *src; int want; }; static const struct row rows[] = { { "pos_local_len", "package main;\n" "export fn main() i32 = {\n" "\tlet a: [3]int = [10, 20, 30];\n" "\treturn a.len: i32;\n" "};\n", 3 }, { "pos_def_len", "package main;\n" "def A: [_]int = [10, 20, 30];\n" "export fn main() i32 = {\n" "\treturn A.len: i32;\n" "};\n", 3 }, /* `.ptr`-on-array is the sanctioned ww spelling for &a[0] (task #13). * LOCAL array `.ptr` is correct in BOTH stages today (cgen unchanged * here); the def-global `.ptr` cgen fix is task #11 / test 818. */ { "pos_local_ptr", "package main;\n" "export fn main() i32 = {\n" "\tlet a: [3]int = [10, 20, 30];\n" "\tlet p: *int = a.ptr;\n" "\treturn (*p): i32;\n" "};\n", 10 }, }; /* `.cap` on a fixed array — both stages must FAIL the build (loud checker * diagnostic, not silent garbage / link-error). */ static const char *neg[] = { /* neg_local_cap */ "package main;\n" "export fn main() i32 = {\n" "\tlet a: [3]int = [1, 2, 3];\n" "\treturn a.cap: i32;\n" "};\n", /* neg_def_cap */ "package main;\n" "def A: [3]int = [1, 2, 3];\n" "export fn main() i32 = {\n" "\treturn A.cap: i32;\n" "};\n", /* neg_let_glob_cap */ "package main;\n" "let G: [3]int = [1, 2, 3];\n" "export fn main() i32 = {\n" "\treturn G.cap: i32;\n" "};\n", /* neg_infer_cap — the #11 [_] infer path */ "package main;\n" "def A: [_]int = [1, 2, 3];\n" "export fn main() i32 = {\n" "\treturn A.cap: i32;\n" "};\n", }; /* Per-neg expected diagnostic body (parallel to neg[]); all four rows hit * the same "no field 'cap' on a fixed-size array" path on both stages. */ static const char *neg_diag[] = { "no field 'cap' on a fixed-size array", "no field 'cap' on a fixed-size array", "no field 'cap' on a fixed-size array", "no field 'cap' on a fixed-size array", }; static int run_driver(const char *driver, const struct row *r, int i) { char src[64], tmpdir[64], cmd[1024]; snprintf(src, sizeof src, "/tmp/acr_%d_%d.ww", getpid(), i); snprintf(tmpdir, sizeof tmpdir, "/tmp/acr_%d_d_%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 2>/dev/null", tmpdir, driver, src); if (runwait(cmd) != 0) { fprintf(stderr, "row[%s]: build via %s failed\n", r->label, driver); unlink(src); rmdir(tmpdir); return -1; } const char *base = strrchr(src, '/'); base = base ? base + 1 : src; char outbin[128]; 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); rmdir(tmpdir); return got; } static int filehas(const char *path, const char *needle) { char buf[8192]; FILE *f = fopen(path, "rb"); if (!f) return 0; size_t n = fread(buf, 1, sizeof buf - 1, f); fclose(f); buf[n] = '\0'; return strstr(buf, needle) != NULL; } /* build_should_fail — `.cap` on an array must error on `driver`; returns 0 * when the build FAILS *and* emits `diag`. A crash (segfault) wraps as a * nonzero "w6c failed" with no diagnostic, so the substring distinguishes * it from a clean reject (#20). */ static int build_should_fail(const char *driver, const char *src, const char *diag, int i) { char s[64], tmpdir[64], cmd[1024], errf[64]; snprintf(s, sizeof s, "/tmp/acrn_%d_%d.ww", getpid(), i); snprintf(tmpdir, sizeof tmpdir, "/tmp/acrn_%d_d_%d", getpid(), i); snprintf(errf, sizeof errf, "/tmp/acrn_%d_e_%d.txt", getpid(), i); FILE *f = fopen(s, "wb"); if (!f) return -1; fputs(src, f); fclose(f); mkdir(tmpdir, 0755); snprintf(cmd, sizeof cmd, "cd %s && %s build %s >/dev/null 2>%s", tmpdir, driver, s, errf); int rc = runwait(cmd); int hasmsg = filehas(errf, diag); unlink(s); unlink(errf); /* clean any emitted binary */ const char *base = strrchr(s, '/'); base = base ? base + 1 : s; char outbin[128]; snprintf(outbin, sizeof outbin, "%s/%s", tmpdir, base); char *dot = strrchr(outbin, '.'); if (dot && strcmp(dot, ".ww") == 0) *dot = '\0'; unlink(outbin); rmdir(tmpdir); /* build must NOT succeed AND must emit its diagnostic. */ return (rc != 0 && hasmsg) ? 0 : -1; } /* asm_byte_identical — w6c vs w6c_ww .s for the same source must match. */ static int asm_byte_identical(const char *bin, const struct row *r, int i) { char src[64], cs[64], ws[64], cmd[1024]; snprintf(src, sizeof src, "/tmp/acr_asm_%d_%d.ww", getpid(), i); snprintf(cs, sizeof cs, "/tmp/acr_asm_%d_%d_c.s", getpid(), i); snprintf(ws, sizeof ws, "/tmp/acr_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; } FILE *fc = fopen(cs, "rb"); FILE *fw = fopen(ws, "rb"); int rc = 0; if (!fc || !fw) { rc = -1; } else { for (;;) { 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); 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[1024]; 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[1024]; snprintf(cdrv, sizeof cdrv, "%s/ww", bin); char wdrv[1024]; snprintf(wdrv, sizeof wdrv, "%s/ww_ww", bin); struct { const char *name; const char *path; int gated_on_existence; } drivers[] = { { "cstage", cdrv, 0 }, { "wwstage", wdrv, 1 }, { NULL, NULL, 0 }, }; int n = (int)(sizeof rows / sizeof rows[0]); int nn = (int)(sizeof neg / sizeof neg[0]); int total = 0, fail = 0; for (int d = 0; drivers[d].name; d++) { if (drivers[d].gated_on_existence && access(drivers[d].path, X_OK) != 0) { fprintf(stderr, "arr_cap_reject: skip %s (no %s)\n", drivers[d].name, drivers[d].path); continue; } for (int i = 0; i < n; i++) { int got = run_driver(drivers[d].path, &rows[i], i); total++; if (got != rows[i].want) { fprintf(stderr, "arr_cap_reject[%s][%s]: exit=%d want=%d\n", drivers[d].name, rows[i].label, got, rows[i].want); fail++; } } for (int i = 0; i < nn; i++) { total++; if (build_should_fail(drivers[d].path, neg[i], neg_diag[i], 100 + i) != 0) { fprintf(stderr, "arr_cap_reject[%s][neg%d]: built ok, " "expected a loud error\n", drivers[d].name, i); fail++; } } } if (access(wdrv, X_OK) == 0) { for (int i = 0; i < n; i++) { total++; if (asm_byte_identical(bin, &rows[i], i) != 0) fail++; } } if (fail) { fprintf(stderr, "arr_cap_reject: %d/%d fixtures failed\n", fail, total); return 1; } printf("arr_cap_reject: %d/%d ok\n", total, total); return 0; }