Hojun-Cho
ce3a25a0b4
The wcc test drivers ran `ww build <bare-/tmp src>` with no -o, so the compiler's <stem>.sepwork scratch landed beside the source and was never cleaned: unbounded /tmp growth (2195 stale dirs observed) that fills tmpfs and fabricates phantom test failures + silent harness aborts, and for in-repo fixture builds leaked .sepwork into the tracked tree. Each leaking build now writes its source + output inside a per-invocation tmpdir, passes -o <tmpdir>/<stem> so the .sepwork lands inside it, and rm -rf's the tmpdir on every exit path -- including fopen-fail and the expected-fail reject builds (scratch is mkdir'd before the build can fail). `ww run` and explicit-`-o`/byte-id helpers are left as-is; the 990/993 byte-id comparison logic is byte-for-byte unchanged. Two items filed separately (this commit holds the no-Makefile / no-main.c rail): - #13: a stale <src>.s byte-id readback (749) silently no-ops since separate-compile emits .s to <ostem>.sepwork/__root.s; documented inline. - #14: build-system Makefile recipes build selfhost/cmd/*/main.ww with no -o and leak main.sepwork in-tree (bounded, gitignored; own commit). One concern -- sepwork leak hygiene -- across 228 drivers; uniform transform applied per-file and two-round reviewed. make test: all 402 passed, zero net-new /tmp scratch, zero test-driven in-repo .sepwork.
223 lines
6.2 KiB
C
223 lines
6.2 KiB
C
/*
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* 640_int_cast_signed — signed narrow `(i64): i8|i16|i32` must
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* sign-extend the narrowed value, not silently truncate. Each
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* fixture casts a high-bit-set source to a narrow signed type,
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* widens back to i64, and returns 42 on the expected match. A
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* cast that fails to sign-extend leaks the low bits and the
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* comparison falls through to the `0` arm.
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*
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* Exercises both stages via the user-facing `ww run` (cstage)
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* and `ww_ww run` (wwstage) when present; the loop runs each
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* driver in turn so a regression on either side is caught
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* here without spawning extra targets.
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*/
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#include <stdio.h>
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#include <stdlib.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 { const char *label; const char *src; int want; };
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static const struct row rows[] = {
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/* i8 ← 0xFFFF_FF80: low byte is 0x80, expect -128 after
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* narrow + widen-back round trip. */
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{ "i8_high_bits_set",
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"fn main() i32 = {\n"
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" let x: i64 = 0xFFFFFF80i64;\n"
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" let y: i8 = x: i8;\n"
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" let z: i64 = y: i64;\n"
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" if (z == -128i64) { return 42; };\n"
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" return 0;\n"
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"};\n",
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42 },
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/* i8 ← 0x80: bare low byte still encodes -128 once narrowed. */
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{ "i8_low_byte_negative",
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"fn main() i32 = {\n"
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" let x: i64 = 0x80i64;\n"
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" let y: i8 = x: i8;\n"
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" let z: i64 = y: i64;\n"
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" if (z == -128i64) { return 42; };\n"
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" return 0;\n"
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"};\n",
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42 },
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/* i8 ← 0x7F: positive, no sign-extend. */
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{ "i8_positive_max",
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"fn main() i32 = {\n"
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" let x: i64 = 0x7Fi64;\n"
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" let y: i8 = x: i8;\n"
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" let z: i64 = y: i64;\n"
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" if (z == 127i64) { return 42; };\n"
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" return 0;\n"
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"};\n",
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42 },
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/* i16 ← 0xFFFF_8000: low 16 bits encode -32768. */
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{ "i16_high_bits_set",
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"fn main() i32 = {\n"
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" let x: i64 = 0xFFFF8000i64;\n"
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" let y: i16 = x: i16;\n"
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" let z: i64 = y: i64;\n"
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" if (z == -32768i64) { return 42; };\n"
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" return 0;\n"
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"};\n",
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42 },
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/* i16 ← 0x8000: low half-word's sign bit alone. */
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{ "i16_low_word_negative",
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"fn main() i32 = {\n"
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" let x: i64 = 0x8000i64;\n"
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" let y: i16 = x: i16;\n"
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" let z: i64 = y: i64;\n"
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" if (z == -32768i64) { return 42; };\n"
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" return 0;\n"
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"};\n",
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42 },
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/* i32 ← 0xFFFFFFFF_80000000: low 32 bits encode INT32_MIN. */
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{ "i32_high_bits_set",
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"fn main() i32 = {\n"
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" let x: i64 = -2147483648i64;\n"
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" let y: i32 = x: i32;\n"
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" let z: i64 = y: i64;\n"
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" if (z == -2147483648i64) { return 42; };\n"
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" return 0;\n"
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"};\n",
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42 },
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/* i32 ← 0x0000_0000_8000_0000: low dword's sign bit alone. */
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{ "i32_low_dword_negative",
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"fn main() i32 = {\n"
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" let x: i64 = 0x80000000i64;\n"
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" let y: i32 = x: i32;\n"
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" let z: i64 = y: i64;\n"
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" if (z == -2147483648i64) { return 42; };\n"
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" return 0;\n"
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"};\n",
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42 },
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/* Compare against the narrow target's own range, not the
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* widened slot — i32 - 1 must roll over to INT32_MAX after
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* MOVSXD sign-extends the wrap-around value. */
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{ "i32_wrap_negative_to_positive",
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"fn main() i32 = {\n"
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" let x: i64 = 0x80000000i64;\n"
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" let y: i32 = (x - 1i64): i32;\n"
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" let z: i64 = y: i64;\n"
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" if (z == 2147483647i64) { return 42; };\n"
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" return 0;\n"
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"};\n",
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42 },
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/* `!T` error-flag wrapper must not block the narrow clamp.
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* Pins the wwstage N_TBANG peel in cgcast: without it, the
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* unsigned u8 mask was skipped and 0x1FF leaked through. */
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{ "u8bang_unsigned_narrow",
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"type u8x = !u8;\n"
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"fn main() i32 = {\n"
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" let y: u8x = 0x1FFu64: u8x;\n"
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" let z: u64 = y: u64;\n"
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" if (z == 0xFFu64) { return 42; };\n"
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" return 0;\n"
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"};\n",
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42 },
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/* Signed `!T` companion — sign-extend must fire through the
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* bang wrapper so `(0xFF80): !i8 → i64` reads back -128. */
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{ "i8bang_signed_narrow",
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"type i8x = !i8;\n"
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"fn main() i32 = {\n"
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" let y: i8x = 0xFF80i64: i8x;\n"
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" let z: i64 = y: i64;\n"
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" if (z == -128i64) { return 42; };\n"
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" return 0;\n"
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"};\n",
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42 },
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};
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static int
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run_driver(const char *driver, const struct row *r, int i)
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{
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char tmpdir[64], src[128], outbin[128], rmcmd[160], cmd[1024];
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snprintf(tmpdir, sizeof tmpdir, "/tmp/wwic_%d_d_%d", getpid(), i);
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mkdir(tmpdir, 0755);
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snprintf(src, sizeof src, "%s/wwic_%d_%d.ww", tmpdir, getpid(), i);
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snprintf(outbin, sizeof outbin, "%s/wwic_%d_%d", tmpdir, getpid(), i);
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snprintf(rmcmd, sizeof rmcmd, "rm -rf %s", tmpdir);
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FILE *f = fopen(src, "wb");
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if (!f) { runwait(rmcmd); return -1; }
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fputs(r->src, f);
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fclose(f);
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snprintf(cmd, sizeof cmd, "%s build -o %s %s", driver, outbin, src);
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if (runwait(cmd) != 0) {
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fprintf(stderr, "row[%s]: build via %s failed\n",
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r->label, driver);
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runwait(rmcmd);
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return -1;
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}
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int got = runwait(outbin);
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runwait(rmcmd);
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return got;
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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];
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snprintf(cdrv, sizeof cdrv, "%s/ww", bin);
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char wdrv[1024];
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snprintf(wdrv, sizeof wdrv, "%s/ww_ww", bin);
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struct { const char *name; const char *path; int gated_on_existence; }
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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_on_existence
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&& access(drivers[d].path, X_OK) != 0) {
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fprintf(stderr, "int_cast_signed: skip %s (no %s)\n",
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drivers[d].name, drivers[d].path);
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continue;
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}
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for (int i = 0; i < n; i++) {
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int got = run_driver(drivers[d].path, &rows[i], i);
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total++;
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if (got != rows[i].want) {
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fprintf(stderr,
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"int_cast_signed[%s][%s]: exit=%d want=%d\n",
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drivers[d].name, rows[i].label,
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got, rows[i].want);
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fail++;
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}
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}
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}
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if (fail) {
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fprintf(stderr,
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"int_cast_signed: %d/%d fixtures failed\n", fail, total);
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return 1;
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}
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printf("int_cast_signed: %d/%d ok\n", total, total);
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return 0;
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}
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