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Cursor indicator + HB-ON/HB-OFF runtime DoE instrumentation toggle

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Cursor (Captain Bob: "the only thing we need is a cursor"):
vt100_draw_cursor() draws a solid block at the terminal's current
position, called from repl.c after the prompt prints and after every
keystroke/backspace. vt100_erase_cursor() cleans up the one gap a static
cursor has -- Enter/newline moves away from the cursor cell without a
character draw ever overwriting it, which left a stray block behind
until this fix.

HB-ON/HB-OFF (Captain Bob: run a program with or without instrumentation
without rebuilding):
Converted per-tick DoE logging from a build-time flag (HEARTBEAT_DOE_LOG)
to a runtime one. doe_log_tick_row() now self-gates on g_doe_log_enabled
(default 1, matching the old default) instead of being compiled out
entirely; the call site in vm_runtime.c is unconditional. Two new FORTH
words, HB-ON and HB-OFF, flip the flag live. Removed the now-dead
HEARTBEAT_DOE_LOG plumbing: the Kconfig symbol, and the -D forwarding in
both LOADER_CFLAGS and KERNEL_CFLAGS.

Verified: three-arch clean QEMU boot + logs; dictionary word count 466
(463 baseline + ALT+TAB + HB-ON + HB-OFF, exactly the three words added
across this session); amd64 screendump confirms the cursor renders
correctly after real interactive typing.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Robert Allan James
2026-08-12 16:22:09 -04:00
co-authored by Claude Sonnet 5
parent af20efaa15
commit 59458a0a16
26 changed files with 51642 additions and 23 deletions
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Makefile.starkernel
+2 -5
View File
@@ -228,9 +228,6 @@ else
LOADER_BASE_CFLAGS := $(COMMON_CFLAGS)
endif
# HEARTBEAT_DOE_LOG is blanket-forwarded (unlike the opt-in-only knobs
# below), so it's repointed through the Kconfig bridge (Phase 6).
$(eval $(call kconfig_bool,HEARTBEAT_DOE_LOG,1))
DOE_INJECT ?= 0
DOE_REPS ?= 3
DOE_SEED ?= 12345
@@ -238,8 +235,8 @@ DOE_SEED ?= 12345
# knobs below), so it's repointed through the Kconfig bridge the same way
# as the hosted Makefile's STRICT_PTR (Phase 3) -- Phase 4 heartbeat family.
$(eval $(call kconfig_bool,EMERGENCY_CONSOLE_ENABLED,1))
LOADER_CFLAGS := $(LOADER_BASE_CFLAGS) -I$(KERNEL_SRC)/vm -DHEARTBEAT_DOE_LOG=$(HEARTBEAT_DOE_LOG)
KERNEL_CFLAGS := $(COMMON_CFLAGS) -D__STARKERNEL__ -I$(KERNEL_SRC)/vm -DHEARTBEAT_DOE_LOG=$(HEARTBEAT_DOE_LOG)
LOADER_CFLAGS := $(LOADER_BASE_CFLAGS) -I$(KERNEL_SRC)/vm
KERNEL_CFLAGS := $(COMMON_CFLAGS) -D__STARKERNEL__ -I$(KERNEL_SRC)/vm
# Linker flags
ifeq ($(ARCH),aarch64)