Hojun-Cho
83f5956df2
Every section banner dies (103 -> 0) across test/lang, the observer suites, the C carriers, and the five comment-heavy corpus fixtures; banner provenance (#N cites, carrier numbers, repair-cluster labels) folded into headers or adjacent WHY comments. Narration deleted; row provenance, ref cites, divergence pins, and layout contracts kept (fwd-ref decl-order guards and bootstrap-gate corpus rationale restored where the sweep over-cut). Comment-only proven: all 3742 wwbuild workdir .s byte-identical before/after; test-commit and test-byteid (161 lang + 1399 data, 0 pinned-divergent) green.
368 lines
11 KiB
C
368 lines
11 KiB
C
/*
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* Explicit bootstrap gate: the C-built `ww` and the ww-built `ww_ww`
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* orchestrate the same w6c/w6a/w6l, so the resulting binaries must be
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* byte-identical for every program in the corpus. The corpus includes
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* a multi-import build (selfhost/cmd/wwdump/main.ww) exercising `use`
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* resolution, the -I search path, and the libwwrt.a link. Each build
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* runs from a per-driver scratch directory so the intermediate .s/.o
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* files don't collide.
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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 <errno.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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#include "wwtestpkg.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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static const char *
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absbin(void)
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{
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const char *b = getenv("BIN");
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if (!b) b = "out/bin";
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if (b[0] == '/') return b;
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static char buf[2048];
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char cwd[1024];
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if (getcwd(cwd, sizeof cwd) == NULL) return NULL;
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snprintf(buf, sizeof buf, "%s/%s", cwd, b);
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return buf;
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}
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static int
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slurp_eq(const char *a, const char *b)
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{
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FILE *fa = fopen(a, "rb");
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FILE *fb = fopen(b, "rb");
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if (!fa || !fb) { if (fa) fclose(fa); if (fb) fclose(fb); return -1; }
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int rc = 0;
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int any = 0;
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for (;;) {
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int ca = fgetc(fa);
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int cb = fgetc(fb);
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if (ca != cb) { rc = -1; break; }
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/* a produced executable can never be legitimately empty. */
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if (ca == EOF) { if (!any) rc = -1; break; }
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any = 1;
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}
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fclose(fa); fclose(fb);
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return rc;
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}
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/* `incs` may be a colon-separated list of include dirs (the ww driver
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* accepts -I path1:path2:path3). */
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static int
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build_via(const char *bin, const char *driver, const char *src,
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const char *workdir, const char *incs, const char *out_basename)
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{
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char cmd[4096];
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/* -o <workdir>/<out> keeps the binary where the diff expects it AND
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* routes the .s/.o intermediates into the workdir (T3) — no longer
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* next to the source, so concurrent driver builds never collide. */
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if (incs && incs[0]) {
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snprintf(cmd, sizeof cmd,
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"cd %s && timeout 180 %s/%s build -o %s/%s -I %s %s 2>/dev/null",
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workdir, bin, driver, workdir, out_basename, incs, src);
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} else {
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snprintf(cmd, sizeof cmd,
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"cd %s && timeout 180 %s/%s build -o %s/%s %s 2>/dev/null",
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workdir, bin, driver, workdir, out_basename, src);
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}
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return runwait(cmd);
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}
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static int
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diff_one(const char *bin, const char *cwd, const char *label,
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const char *src, const char *out_basename,
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const char *incs)
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{
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char dc[64], dw[64];
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snprintf(dc, sizeof dc, "/tmp/ww_d_%d_c", getpid());
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snprintf(dw, sizeof dw, "/tmp/ww_d_%d_w", getpid());
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char cmd[256];
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int rc = -1;
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snprintf(cmd, sizeof cmd, "rm -rf %s %s && mkdir -p %s %s", dc, dw, dc, dw);
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if (runwait(cmd) != 0) goto cleanup;
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if (build_via(bin, "ww", src, dc, incs, out_basename) != 0) {
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fprintf(stderr, "ww_ww FAIL: C ww errored on %s\n", label);
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goto cleanup;
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}
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if (build_via(bin, "ww_ww", src, dw, incs, out_basename) != 0) {
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fprintf(stderr, "ww_ww FAIL: ww ww errored on %s\n", label);
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goto cleanup;
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}
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char co[1024], wo[1024];
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snprintf(co, sizeof co, "%s/%s", dc, out_basename);
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snprintf(wo, sizeof wo, "%s/%s", dw, out_basename);
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if (slurp_eq(co, wo) != 0)
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fprintf(stderr, "ww_ww FAIL: %s — driver outputs differ\n", label);
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else
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rc = 0;
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cleanup:
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/* `ww build` retains the caller-owned .sepwork tree inside the
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* workdir; rm -rf of the exact pid-keyed pair covers it, and is
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* safe even after a partial mkdir. */
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snprintf(cmd, sizeof cmd, "rm -rf %s %s", dc, dw);
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if (runwait(cmd) != 0 && rc == 0)
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rc = -1;
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(void)cwd;
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return rc;
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}
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/* #16: `run` must report the child's real exit code, not collapse
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* every non-zero exit to 1. Returns -1 on staging/spawn failure. */
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static int
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run_exit_code(const char *bin, const char *driver, int code)
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{
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char src[64];
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snprintf(src, sizeof src, "/tmp/ww_rc_%d_%d.ww", getpid(), code);
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FILE *f = fopen(src, "w");
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if (!f) return -1;
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fprintf(f, "package main;\nexport fn main() i32 = {\n\treturn %d;\n};\n",
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code);
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if (fclose(f) != 0) {
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perror(src);
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if (unlink(src) != 0 && errno != ENOENT)
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perror(src);
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return -1;
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}
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char cmd[256];
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snprintf(cmd, sizeof cmd, "%s/%s run %s 2>/dev/null", bin, driver, src);
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int rc = runwait(cmd);
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if (unlink(src) != 0 && errno != ENOENT) {
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perror(src);
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if (rc == code)
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rc = -1;
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}
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return rc;
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}
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/* Pins the build-step caller contract: a failing build must still
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* report failure (non-zero). The process mechanism's exact exit-code
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* return must not regress this, since the w6c/w6a/w6l callers only
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* test `!= 0`. */
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static int
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run_build_fail(const char *bin, const char *driver)
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{
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char src[64];
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snprintf(src, sizeof src, "/tmp/ww_badbuild_%d.ww", getpid());
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FILE *f = fopen(src, "w");
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if (!f) {
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perror(src);
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return -1;
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}
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wwtest_fputs("export fn main() i32 = {\n\treturn 1\n", f); /* no ; no } */
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if (fclose(f) != 0) {
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perror(src);
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if (unlink(src) != 0 && errno != ENOENT)
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perror(src);
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return -1;
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}
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char cmd[256];
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snprintf(cmd, sizeof cmd, "%s/%s run %s 2>/dev/null", bin, driver, src);
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int rc = runwait(cmd);
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if (unlink(src) != 0 && errno != ENOENT) {
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perror(src);
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/* cleanup failure maps onto the -1 sentinel the caller rejects;
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* a real rc==0 (driver failed to fail) keeps its diagnostic. */
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if (rc != 0)
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rc = -1;
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}
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return rc;
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}
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/* #16 ENFORCE-driver: an unresolvable import is a hard error, not a silent
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* skip — the driver must exit nonzero AND print "ww: cannot find package
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* <name>". Both drivers must agree (rule-10 wording). Returns 0 if the
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* driver loud-fails as expected, 1 otherwise. (The ww_ww half is why this
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* lives in 993, the rule-14-safe wwstage-driver range.) */
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static int
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run_missing_pkg(const char *bin, const char *driver)
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{
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char tmpdir[80], src[160], errf[160], outbin[160], rmcmd[200];
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snprintf(tmpdir, sizeof tmpdir, "/tmp/ww_mp_%s_%d", driver, getpid());
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if (mkdir(tmpdir, 0755) != 0) {
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perror(tmpdir);
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return 1;
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}
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snprintf(src, sizeof src, "%s/mp.ww", tmpdir);
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snprintf(errf, sizeof errf, "%s/mp.err", tmpdir);
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snprintf(outbin, sizeof outbin, "%s/mp", tmpdir);
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snprintf(rmcmd, sizeof rmcmd, "rm -rf %s", tmpdir);
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FILE *f = fopen(src, "w");
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if (!f) {
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perror(src);
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if (runwait(rmcmd) != 0)
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fprintf(stderr, "ww_ww: cleanup of %s failed\n", tmpdir);
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return 1;
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}
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wwtest_fputs("import nosuchpkg;\nexport fn main() i32 = { return 0; };\n", f);
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fclose(f);
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/* #8: the sep scratch is mkdir'd before the import-resolution failure,
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* so a no-o build leaks /tmp/ww_mp_*.sepwork. -o routes it under tmpdir;
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* rm -rf clears it. The missing-pkg error wording is -o-independent. */
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char cmd[512];
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snprintf(cmd, sizeof cmd, "%s/%s build -o %s %s 2>%s",
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bin, driver, outbin, src, errf);
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int rc = runwait(cmd);
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int found = 0;
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FILE *e = fopen(errf, "rb");
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if (e) {
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char buf[4096];
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size_t n = fread(buf, 1, sizeof buf - 1, e);
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fclose(e);
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buf[n] = '\0';
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found = strstr(buf, "cannot find package nosuchpkg") != NULL;
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}
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int cleanfail = runwait(rmcmd) != 0;
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if (rc == 0 || !found) {
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fprintf(stderr, "ww_ww FAIL: %s missing-pkg rc=%d found=%d "
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"(want nonzero + 'cannot find package')\n", driver, rc, found);
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return 1;
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}
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if (cleanfail) {
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fprintf(stderr, "ww_ww: cleanup of %s failed\n", tmpdir);
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return 1;
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}
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return 0;
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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 = absbin();
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if (!bin) return 1;
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char cwd[1024];
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if (getcwd(cwd, sizeof cwd) == NULL) return 1;
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/* Stage a tiny program in a place both drivers can reach.
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* pid-keyed so concurrent runs of this test (or shards of it) don't
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* race on the staging file. */
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char hello_src[64], hello_out[64];
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snprintf(hello_src, sizeof hello_src, "/tmp/ww_d_hello_%d.ww", getpid());
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snprintf(hello_out, sizeof hello_out, "ww_d_hello_%d", getpid());
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{
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FILE *f = fopen(hello_src, "w");
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if (!f) return 1;
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wwtest_fputs("import os;\n\n"
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"export fn main() i32 = {\n"
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"\tos.write(1, \"hi\\n\".ptr, 3u64);\n"
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"\treturn 0;\n"
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"};\n", f);
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if (fclose(f) != 0) {
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perror(hello_src);
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if (unlink(hello_src) != 0 && errno != ENOENT)
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perror(hello_src);
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return 1;
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}
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}
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struct {
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const char *label;
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const char *src; /* may be relative to cwd */
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const char *out; /* basename of expected output */
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const char *incs; /* colon-separated -I list, may be NULL */
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} cases[] = {
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{ "hello", NULL, NULL, "" }, /* filled in below */
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{ "wwdump", NULL, "main", NULL }, /* filled in below */
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{ NULL, NULL, NULL, NULL },
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};
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cases[0].src = hello_src;
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cases[0].out = hello_out;
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/* wwdump case: absolute paths so the driver finds the imports
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* regardless of the per-driver workdir. */
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static char wwdump_src[2048], wwdump_incs[4096];
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snprintf(wwdump_src, sizeof wwdump_src, "%s/selfhost/cmd/wwdump/main.ww", cwd);
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snprintf(wwdump_incs, sizeof wwdump_incs,
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"%s/lib/ww:%s/lib/encoding/utf8:%s/selfhost/cmd/wcc",
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cwd, cwd, cwd);
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cases[1].src = wwdump_src;
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cases[1].incs = wwdump_incs;
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int fail = 0;
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int n = 0;
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int cleanfail = 0;
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for (int i = 0; cases[i].label; i++) {
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if (diff_one(bin, cwd, cases[i].label, cases[i].src,
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cases[i].out, cases[i].incs) != 0)
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fail++;
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n++;
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}
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if (unlink(hello_src) != 0 && errno != ENOENT) {
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perror(hello_src);
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cleanfail = 1;
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}
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/* #16: `ww_ww run` must propagate the child program's real exit code.
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* Table-driven; the non-zero rows fail under the old collapse-to-1.
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* 255 is the single-byte boundary (WEXITSTATUS max). The C ww driver
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* is the reference (do_run -> WEXITSTATUS); assert ww_ww matches it
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* row-for-row. */
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static const int exit_codes[] = { 0, 7, 42, 255 };
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int nrc = (int)(sizeof exit_codes / sizeof exit_codes[0]);
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int rcfail = 0;
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for (int i = 0; i < nrc; i++) {
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int want = exit_codes[i];
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int cww = run_exit_code(bin, "ww", want);
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int wwww = run_exit_code(bin, "ww_ww", want);
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if (cww != want) {
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fprintf(stderr, "ww_ww FAIL: C ww run returned %d, "
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"want %d\n", cww, want);
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rcfail++;
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}
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if (wwww != want) {
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fprintf(stderr, "ww_ww FAIL: ww_ww run returned %d, "
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"want %d (exit-code propagation, #16)\n", wwww, want);
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rcfail++;
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}
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}
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/* Build-step caller contract: a failing build must still report
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* failure (non-zero), and both drivers must agree. */
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int cbad = run_build_fail(bin, "ww");
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int wbad = run_build_fail(bin, "ww_ww");
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/* <= 0 rejects the -1 staging/cleanup sentinel: equal sentinels must
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* not pass as build-fail parity when neither driver ever ran. */
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if (cbad <= 0 || wbad <= 0 || cbad != wbad) {
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fprintf(stderr, "ww_ww FAIL: build-fail exit C ww=%d ww_ww=%d "
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"(want equal and non-zero)\n", cbad, wbad);
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rcfail++;
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}
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/* #16 ENFORCE-driver: a missing import package loud-fails (nonzero +
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* "cannot find package") on BOTH drivers — identical wording. */
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rcfail += run_missing_pkg(bin, "ww");
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rcfail += run_missing_pkg(bin, "ww_ww");
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if (fail || rcfail || cleanfail) {
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fprintf(stderr, "ww_ww: %d/%d diff(s) failed, %d exit-code "
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"row(s) failed\n", fail, n, rcfail);
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return 1;
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}
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printf("ww_ww: byte-identical to C ww on %d corpus builds "
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"(single-file + selfhost/wwdump multi-import); "
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"run exit-code propagated on %d rows + build-fail parity (#16)\n",
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n, nrc);
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return 0;
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}
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