Hojun-Cho
e8ef1e061c
Reject helpers checked only rc!=0, so a SEGFAULT (exit 139, or the driver's "w6c failed" exit 1) counted as a clean reject -- a wwstage crash could pass vacuously (it did, latently, on bodied bare-... pre #11). Every reject row now captures stderr and requires the actual diagnostic substring (rc!=0 AND strstr) across all 16 reject tests; a crash emits no diagnostic, so it now fails. This is the differential-reject backstop (#15): both stages must cleanly reject with the expected message. Two genuine cstage/wwstage diagnostic-body divergences are documented inline via per-stage substrings, not papered over (845 tuple parse, catA_f2 tuple arity); catalogued in #21.
239 lines
6.7 KiB
C
239 lines
6.7 KiB
C
/*
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* 989_intoverflow_reject — F14 #53: wwstage parseint dropped the u64
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* overflow guard the C twin carries (cmd/wcc/lex.c:156
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* `if (v > (u64)~0ULL / (u64)base)`), so any integer literal that
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* overflows u64 was silently accepted mod 2^64 by wwstage while cstage
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* loudly rejected with "bad integer literal". The fix ports the
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* pre-multiply guard into lib/ww/lex/lex.ww parseint, aligning wwstage
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* UP to cstage.
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*
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* Each REJECT row is a literal that exceeds u64 and must FAIL to build
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* on BOTH driver twins; each control fits in u64 and must build+run.
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* Edge rows: U64_MAX decimal and hex (the largest accepted), a 65-bit
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* hex (smallest-bit overflow), a 21-digit decimal, and a 2^128-1
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* decimal. The exact-2^64 boundary family is NOT a row here: cstage's
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* own cheap-check leaks it (report-item #54, a separate both-stages
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* item), so both stages accept it identically — outside #53's scope.
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*
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* Rule-10: every row runs on cstage `ww` and wwstage `ww_ww`; both must
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* agree. wwstage rows are gated on out/bin/ww_ww.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.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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struct row {
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const char *label;
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const char *src;
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int expect_build; /* 1 = build+run to want_exit; 0 = must FAIL */
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int want_exit;
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const char *diag; /* expected reject diagnostic (NULL for build rows) */
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};
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static const struct row rows[] = {
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/* REJECT — 21-digit decimal, well over u64. */
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{ "dec_overflow",
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"package main;\n"
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"export fn main() i32 = {\n"
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" let x: u64 = 99999999999999999999u64;\n"
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" return x: i32;\n"
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"};\n",
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0, 0, "bad integer literal" },
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/* REJECT — 65-bit hex (smallest overflow above U64_MAX). */
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{ "hex_overflow",
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"package main;\n"
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"export fn main() i32 = {\n"
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" let x: u64 = 0x1ffffffffffffffffu64;\n"
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" return x: i32;\n"
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"};\n",
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0, 0, "bad integer literal" },
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/* REJECT — 2^128-1 decimal, far over u64. */
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{ "dec_huge",
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"package main;\n"
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"export fn main() i32 = {\n"
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" let x: u64 = 340282366920938463463374607431768211455u64;\n"
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" return x: i32;\n"
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"};\n",
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0, 0, "bad integer literal" },
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/* control — U64_MAX decimal is the largest accepted literal. */
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{ "u64max_dec_ok",
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"package main;\n"
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"export fn main() i32 = {\n"
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" let x: u64 = 18446744073709551615u64;\n"
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" if (x == 18446744073709551615u64) { return 7; };\n"
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" return 0;\n"
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"};\n",
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1, 7 },
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/* control — U64_MAX hex, same value via the base-16 path. */
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{ "u64max_hex_ok",
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"package main;\n"
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"export fn main() i32 = {\n"
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" let x: u64 = 0xffffffffffffffffu64;\n"
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" if (x == 18446744073709551615u64) { return 9; };\n"
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" return 0;\n"
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"};\n",
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1, 9 },
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};
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static int
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run_build(const char *driver, const struct row *r, int i)
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{
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char src[64], tmpdir[64], cmd[1024];
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snprintf(src, sizeof src, "/tmp/iov_%d_%d.ww", getpid(), i);
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snprintf(tmpdir, sizeof tmpdir, "/tmp/iov_%d_d_%d", getpid(), i);
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FILE *f = fopen(src, "wb");
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if (!f) return -2;
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fputs(r->src, f);
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fclose(f);
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mkdir(tmpdir, 0755);
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snprintf(cmd, sizeof cmd, "cd %s && %s build %s 2>/dev/null",
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tmpdir, driver, src);
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int brc = runwait(cmd);
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const char *base = strrchr(src, '/');
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base = base ? base + 1 : src;
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char outbin[128];
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snprintf(outbin, sizeof outbin, "%s/%s", tmpdir, base);
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char *dot = strrchr(outbin, '.');
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if (dot && strcmp(dot, ".ww") == 0) *dot = '\0';
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int got = -1;
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if (brc == 0) got = runwait(outbin);
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unlink(src); unlink(outbin); rmdir(tmpdir);
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return brc == 0 ? got : -1;
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}
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static int
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filehas(const char *path, const char *needle)
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{
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char buf[8192];
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FILE *f = fopen(path, "rb");
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if (!f) return 0;
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size_t n = fread(buf, 1, sizeof buf - 1, f);
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fclose(f);
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buf[n] = '\0';
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return strstr(buf, needle) != NULL;
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}
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/* build_should_fail — the build must FAIL *and* emit `diag`. A crash
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* (segfault) wraps as a nonzero "w6c failed" with no diagnostic, so the
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* substring check distinguishes it from a clean reject (#20). cstage
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* quotes the literal ("bad integer literal '99...'"), wwstage does not;
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* "bad integer literal" is the shared core. */
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static int
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build_should_fail(const char *driver, const char *src, const char *diag,
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int i)
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{
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char s[64], tmpdir[64], cmd[1024], errf[64];
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snprintf(s, sizeof s, "/tmp/iovn_%d_%d.ww", getpid(), i);
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snprintf(tmpdir, sizeof tmpdir, "/tmp/iovn_%d_d_%d", getpid(), i);
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snprintf(errf, sizeof errf, "/tmp/iovn_%d_e_%d.txt", getpid(), i);
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FILE *f = fopen(s, "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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mkdir(tmpdir, 0755);
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snprintf(cmd, sizeof cmd, "cd %s && %s build %s >/dev/null 2>%s",
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tmpdir, driver, s, errf);
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int rc = runwait(cmd);
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int hasmsg = filehas(errf, diag);
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unlink(s);
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unlink(errf);
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const char *base = strrchr(s, '/');
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base = base ? base + 1 : s;
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char outbin[128];
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snprintf(outbin, sizeof outbin, "%s/%s", tmpdir, base);
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char *dot = strrchr(outbin, '.');
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if (dot && strcmp(dot, ".ww") == 0) *dot = '\0';
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unlink(outbin);
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rmdir(tmpdir);
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/* build must NOT succeed AND must emit its diagnostic. */
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return (rc != 0 && hasmsg) ? 0 : -1;
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}
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int
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main(void)
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{
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const char *bin = getenv("BIN");
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if (!bin) bin = "out/bin";
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char absbin[1024];
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if (bin[0] != '/') {
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char cwd[1024];
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if (getcwd(cwd, sizeof cwd) == NULL) return 1;
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snprintf(absbin, sizeof absbin, "%s/%s", cwd, bin);
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bin = absbin;
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}
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char cdrv[1024], wdrv[1024];
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snprintf(cdrv, sizeof cdrv, "%s/ww", bin);
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snprintf(wdrv, sizeof wdrv, "%s/ww_ww", bin);
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struct { const char *name; const char *drv; int gated; }
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drivers[] = {
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{ "cstage", cdrv, 0 },
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{ "wwstage", wdrv, 1 },
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{ NULL, NULL, 0 },
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};
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int n = (int)(sizeof rows / sizeof rows[0]);
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int total = 0, fail = 0;
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for (int d = 0; drivers[d].name; d++) {
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if (drivers[d].gated && access(drivers[d].drv, X_OK) != 0) {
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fprintf(stderr, "intoverflow_reject: skip %s (no %s)\n",
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drivers[d].name, drivers[d].drv);
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continue;
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}
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for (int i = 0; i < n; i++) {
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total++;
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if (rows[i].expect_build) {
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int got = run_build(drivers[d].drv, &rows[i], i);
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if (got != rows[i].want_exit) {
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fprintf(stderr, "intoverflow_reject[%s][%s]: "
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"exit=%d want=%d\n", drivers[d].name,
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rows[i].label, got, rows[i].want_exit);
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fail++;
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}
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} else {
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if (build_should_fail(drivers[d].drv, rows[i].src,
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rows[i].diag, 100 + i) != 0) {
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fprintf(stderr, "intoverflow_reject[%s][%s]: "
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"built ok, expected a loud reject\n",
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drivers[d].name, rows[i].label);
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fail++;
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}
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}
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}
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}
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if (fail) {
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fprintf(stderr, "intoverflow_reject: %d/%d fixtures failed\n",
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fail, total);
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return 1;
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}
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printf("intoverflow_reject: %d/%d ok\n", total, total);
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return 0;
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}
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