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.
344 lines
10 KiB
C
344 lines
10 KiB
C
/*
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* 689_structlit_slice_field — cstage and wwstage agree, byte-for-byte
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* and at runtime, that a struct-LITERAL initializer `cl{ items = b, n =
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* .. }` with a SLICE field copies the FULL 24B { ptr, len, cap } header
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* of that field (task #24).
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*
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* The bug: cg_structlit_fill / cgstructlitfill had a TY_STR arm that
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* stored all three header words (ptr@+0, len@+8, cap@+16), but NO
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* TY_SLICE arm — a slice field fell through to the generic scalar tail
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* which stored only the ptr word, so the stored .len and .cap read 0.
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* str fields (same 24B shape) worked; slice fields silently dropped
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* two words. Both stages emitted IDENTICAL wrong asm (the 990-997
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* byte-id gate was green on both-wrong), so RUNTIME readback is the
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* correctness net. Same is_str/is_slice discrimination gap as #10
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* part-b, here in the struct-literal field-init path.
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*
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* The fix (BOTH stages, converged byte-identical): the str arm's guard
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* widens to `TY_STR || TY_SLICE` (cstage) / `isstrtype || isslicetype`
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* (wwstage) — a slice rides the existing, already-correct 3-word store.
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* The TAGGED arm stays ordered BEFORE it, so a nullable/tagged slice
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* (TY_TAGGED) still routes to the widener, not the 3-word store.
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*
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* Mutation-sanity: the .len and .cap rows fail if the store drops
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* either word (the pre-fix 1-word slice store), and the scalar-field
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* rows (y.n, y.head) pin that the field beside/before the slice is
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* untouched. The str_* rows are a regression pin on the untouched str
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* arm.
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*
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* row | shape | want
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* ---------------+------------------------------------------+------
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* slice_len | cl{items=b,n=9}; b.len=5; y.items.len | 5
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* slice_cap | cl{items=b,n=9}; b.cap=8; y.items.cap | 8
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* slice_n | cl{items=b,n=9}; y.n (scalar beside slice)| 9
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* slice_ptr | hb[0]=4; cl{items=b,..}; y.items[0] | 4
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* off_len | struct{head:i64,s:[]u8}; s @foff 8; | 7
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* | s.len=7; y.s.len (pins disp+foff+8 hdr) |
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* off_cap | same; s.cap=8; y.s.cap (disp+foff+16) | 8
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* off_head | same; head=1; y.head (scalar before slice)| 1
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* two_b_len | struct{a:[]u8,b:[]u8}; b @foff 24; | 6
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* | b.len=6; y.b.len (2nd slice, non-0 foff) |
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* two_b_cap | same; b.cap=8; y.b.cap | 8
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* str_name_len | struct{s:[]u8,name:str}; name="hello"; | 5
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* | y.name.len (str arm regression pin) |
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* str_s_len | same; s.len=3; y.s.len (slice beside str) | 3
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*
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* The asm-byte-id rows pin the symmetric fix (cstage == wwstage); a
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* non-empty diff means one stage missed the new slice arm.
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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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{ "slice_len",
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"package main;\n"
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"type cl = struct { items: []u8, n: i64 };\n"
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"export fn main() i32 = {\n"
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"\tlet hb: [8]u8;\n"
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"\tlet b: []u8; b.ptr = &hb[0]; b.len = 5; b.cap = 8;\n"
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"\tlet y: cl = cl { items = b, n = 9i64 };\n"
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"\treturn y.items.len: i32;\n"
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"};\n",
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5 },
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{ "slice_cap",
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"package main;\n"
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"type cl = struct { items: []u8, n: i64 };\n"
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"export fn main() i32 = {\n"
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"\tlet hb: [8]u8;\n"
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"\tlet b: []u8; b.ptr = &hb[0]; b.len = 5; b.cap = 8;\n"
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"\tlet y: cl = cl { items = b, n = 9i64 };\n"
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"\treturn y.items.cap: i32;\n"
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"};\n",
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8 },
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{ "slice_n",
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"package main;\n"
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"type cl = struct { items: []u8, n: i64 };\n"
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"export fn main() i32 = {\n"
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"\tlet hb: [8]u8;\n"
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"\tlet b: []u8; b.ptr = &hb[0]; b.len = 5; b.cap = 8;\n"
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"\tlet y: cl = cl { items = b, n = 9i64 };\n"
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"\treturn y.n: i32;\n"
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"};\n",
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9 },
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{ "slice_ptr",
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"package main;\n"
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"type cl = struct { items: []u8, n: i64 };\n"
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"export fn main() i32 = {\n"
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"\tlet hb: [8]u8; hb[0] = 4u8;\n"
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"\tlet b: []u8; b.ptr = &hb[0]; b.len = 5; b.cap = 8;\n"
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"\tlet y: cl = cl { items = b, n = 9i64 };\n"
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"\treturn y.items[0]: i32;\n"
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"};\n",
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4 },
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/* slice field at a NON-ZERO field offset (head: i64 @0, s @8).
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* Pins disp+foff+8/+16 in the stored header. */
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{ "off_len",
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"package main;\n"
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"type hs = struct { head: i64, s: []u8 };\n"
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"export fn main() i32 = {\n"
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"\tlet hb: [8]u8;\n"
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"\tlet b: []u8; b.ptr = &hb[0]; b.len = 7; b.cap = 8;\n"
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"\tlet y: hs = hs { head = 1i64, s = b };\n"
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"\treturn y.s.len: i32;\n"
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"};\n",
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7 },
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{ "off_cap",
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"package main;\n"
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"type hs = struct { head: i64, s: []u8 };\n"
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"export fn main() i32 = {\n"
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"\tlet hb: [8]u8;\n"
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"\tlet b: []u8; b.ptr = &hb[0]; b.len = 7; b.cap = 8;\n"
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"\tlet y: hs = hs { head = 1i64, s = b };\n"
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"\treturn y.s.cap: i32;\n"
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"};\n",
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8 },
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{ "off_head",
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"package main;\n"
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"type hs = struct { head: i64, s: []u8 };\n"
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"export fn main() i32 = {\n"
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"\tlet hb: [8]u8;\n"
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"\tlet b: []u8; b.ptr = &hb[0]; b.len = 7; b.cap = 8;\n"
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"\tlet y: hs = hs { head = 1i64, s = b };\n"
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"\treturn y.head: i32;\n"
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"};\n",
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1 },
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/* two slice fields: a @0, b @24. Pins the 2nd slice's header at a
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* non-zero field offset (the 24B stride). */
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{ "two_b_len",
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"package main;\n"
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"type tt = struct { a: []u8, b: []u8 };\n"
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"export fn main() i32 = {\n"
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"\tlet hb: [8]u8;\n"
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"\tlet p: []u8; p.ptr = &hb[0]; p.len = 3; p.cap = 8;\n"
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"\tlet q: []u8; q.ptr = &hb[0]; q.len = 6; q.cap = 8;\n"
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"\tlet y: tt = tt { a = p, b = q };\n"
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"\treturn y.b.len: i32;\n"
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"};\n",
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6 },
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{ "two_b_cap",
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"package main;\n"
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"type tt = struct { a: []u8, b: []u8 };\n"
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"export fn main() i32 = {\n"
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"\tlet hb: [8]u8;\n"
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"\tlet p: []u8; p.ptr = &hb[0]; p.len = 3; p.cap = 8;\n"
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"\tlet q: []u8; q.ptr = &hb[0]; q.len = 6; q.cap = 8;\n"
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"\tlet y: tt = tt { a = p, b = q };\n"
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"\treturn y.b.cap: i32;\n"
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"};\n",
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8 },
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/* str field beside a slice field — the untouched str arm must still
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* store its full header (regression pin). */
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{ "str_name_len",
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"package main;\n"
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"type sn = struct { s: []u8, name: str };\n"
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"export fn main() i32 = {\n"
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"\tlet hb: [8]u8;\n"
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"\tlet b: []u8; b.ptr = &hb[0]; b.len = 3; b.cap = 8;\n"
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"\tlet y: sn = sn { s = b, name = \"hello\" };\n"
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"\treturn y.name.len: i32;\n"
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"};\n",
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5 },
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{ "str_s_len",
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"package main;\n"
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"type sn = struct { s: []u8, name: str };\n"
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"export fn main() i32 = {\n"
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"\tlet hb: [8]u8;\n"
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"\tlet b: []u8; b.ptr = &hb[0]; b.len = 3; b.cap = 8;\n"
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"\tlet y: sn = sn { s = b, name = \"hello\" };\n"
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"\treturn y.s.len: i32;\n"
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"};\n",
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3 },
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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/slf_%d_d_%d", getpid(), i);
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mkdir(tmpdir, 0755);
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snprintf(src, sizeof src, "%s/slf_%d_%d.ww", tmpdir, getpid(), i);
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snprintf(outbin, sizeof outbin, "%s/slf_%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 2>/dev/null",
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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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/* asm_byte_identical — w6c vs w6c_ww .s for the same source must match.
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* Pre-fix BOTH stages dropped len+cap identically (byte-id green on
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* both-wrong); the symmetric fix keeps them byte-identical and correct. */
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static int
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asm_byte_identical(const char *bin, const struct row *r, int i)
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{
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char src[64], cs[64], ws[64], cmd[1024];
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snprintf(src, sizeof src, "/tmp/slf_asm_%d_%d.ww", getpid(), i);
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snprintf(cs, sizeof cs, "/tmp/slf_asm_%d_%d_c.s", getpid(), i);
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snprintf(ws, sizeof ws, "/tmp/slf_asm_%d_%d_w.s", getpid(), i);
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FILE *f = fopen(src, "wb");
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if (!f) 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/w6c -o %s %s 2>/dev/null", bin, cs, src);
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if (runwait(cmd) != 0) {
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fprintf(stderr, "row[%s]: w6c errored\n", r->label);
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unlink(src);
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return -1;
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}
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snprintf(cmd, sizeof cmd, "%s/w6c_ww -o %s %s 2>/dev/null",
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bin, ws, src);
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if (runwait(cmd) != 0) {
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fprintf(stderr, "row[%s]: w6c_ww errored\n", r->label);
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unlink(src); unlink(cs);
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return -1;
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}
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FILE *fc = fopen(cs, "rb");
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FILE *fw = fopen(ws, "rb");
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int rc = 0;
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if (!fc || !fw) {
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rc = -1;
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} else {
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for (;;) {
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int a = fgetc(fc);
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int b = fgetc(fw);
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if (a != b) { rc = -1; break; }
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if (a == EOF) break;
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}
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}
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if (fc) fclose(fc);
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if (fw) fclose(fw);
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if (rc != 0)
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fprintf(stderr, "row[%s]: cstage vs wwstage asm differs\n",
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r->label);
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unlink(src); unlink(cs); unlink(ws);
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return rc;
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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, "structlit_slice_field: 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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"structlit_slice_field[%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 (access(wdrv, X_OK) == 0) {
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for (int i = 0; i < n; i++) {
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total++;
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if (asm_byte_identical(bin, &rows[i], i) != 0)
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fail++;
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}
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}
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if (fail) {
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fprintf(stderr,
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"structlit_slice_field: %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("structlit_slice_field: %d/%d ok\n", total, total);
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return 0;
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}
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