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lib+test: add log over io.stream sink

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Hare-shaped lib/log v1: logger vtable carrying one println slot,
stdlogger forwarding to a *io.stream, plus *logger globals (silent
/ default / global), setlogger, lprintln / println, lfatal / fatal.
Default sink is stderr through a private rt_syscall write callback;
graduates with #17 (cgen mod-mangle for fn labels), at which point
the rt_syscall stub disappears the same way fmt's will.

Module-scope struct/pointer-literal init isn't constexpr in cstage
emit_lets, so silent/default/global are wired lazily by ensureinit
on the first exported-fn entry (lib/temp rnginit pattern). Callers
that read the globals directly must call some lib/log fn first.

Skipped this round: printfln / lprintfln / fatalf / lfatalf and the
matching printfln vtable slot — they need a fmt {n}-placeholder
parser that isn't shipped yet. fatal / lfatal's exit(255) arm has
no test fixture (needs fork+wait for WEXITSTATUS); left as TODO.

971_log_run wraps the @test fixture under `ww run`, mirroring
970_fmt_run. make test: 54/54; bootstrap fixed-point (990-997)
holds.
This commit is contained in:
Hojun-Cho
2026-05-15 14:05:55 +09:00
parent 9d85aa4142
commit e7f173cde0
4 changed files with 486 additions and 1 deletions
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6
Makefile
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@@ -230,7 +230,7 @@ TESTS = $(BIN)/test_smoke $(BIN)/test_lex $(BIN)/test_parse $(BIN)/test_check \
$(BIN)/test_selfhost $(BIN)/test_w6a_ww $(BIN)/test_w6l_ww \
$(BIN)/test_w6c_ww $(BIN)/test_ww_ww $(BIN)/test_self_rebuild \
$(BIN)/test_dyn_ww $(BIN)/test_selfcheck $(BIN)/test_at_test_ww \
$(BIN)/test_fmt_run \
$(BIN)/test_fmt_run $(BIN)/test_log_run \
$(BIN)/test_memio_run $(BIN)/test_temp_run $(BIN)/test_getopt_run \
$(BIN)/test_base32_run $(BIN)/test_base64_run \
$(BIN)/test_adler32_run $(BIN)/test_crc16_run \
@@ -415,6 +415,10 @@ $(BIN)/test_fmt_run: test/wcc/970_fmt_run.c $(BIN)/ww $(BIN)/w6c \
$(BIN)/w6a $(BIN)/w6l $(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_log_run: test/wcc/971_log_run.c $(BIN)/ww $(BIN)/w6c \
$(BIN)/w6a $(BIN)/w6l $(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_memio_run: test/wcc/980_memio_run.c $(BIN)/ww $(BIN)/w6c \
$(BIN)/w6a $(BIN)/w6l $(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<