wasm-simulator/docs/linuxcnc-tooldata-source-map.md

LinuxCNC tooldata source map

This map records the source basis and boundaries for LinuxCNC tooldata coverage in native, source-link, switchkins, and WASM-safe build paths. It is a source-link/shim guard only; it must not add CNC behavior and must not expand the temporary smoke parser.

LinuxCNC Source Basis

• src/emc/tooldata/Submakefile selects tooldata_mmap.cc or tooldata_nml.cc, and always includes tooldata_common.cc, tooldata_db.cc, and tool_watch.cc.
• src/emc/tooldata/tooldata_common.cc provides tool table parsing, formatting, load/save, and database-mode entry points.
• src/emc/tooldata/tooldata_mmap.cc provides native mmap tool table storage.
• src/emc/tooldata/tooldata_nml.cc provides the NML tool table registration backend selected by TOOL_NML_FLAG.
• src/emc/tooldata/tooldata_db.cc provides external database entry points.
• src/emc/tooldata/tooldata_db.cc returns -1 from tooldata_db_getall() when the external DB is not live, and returns 0 from tooldata_db_notify() without side effects in that same state.
• src/emc/tooldata/tool_mmap_read.cc and src/emc/tooldata/tool_watch.cc are utility sources from the same LinuxCNC tooldata build metadata.
• src/emc/tooldata/tooldata.hh declares the tooldata API used by RS274 and WASM-safe shims.

Manifest And Shim Coverage

Coverage	Boundary
linuxcnc-rs274-source-files.txt	Tracks the full LinuxCNC src/emc/tooldata source directory and tooldata.hh.
linuxcnc-rs274-wasm-source-files.txt	Links tooldata_common.cc, blocks native tooldata_mmap.cc, and records runtime shim source bases for tooldata_db.cc and tooldata_nml.cc.
linuxcnc-kinematics-source-files.txt	Tracks 10 LinuxCNC TOOL_TABLE files referenced by covered M428/M429/M430 INI sources as tooldata source coverage only.
core/wasm_shims/tooldata/tooldata_mmap_backend.cc	Adapts LinuxCNC tooldata_mmap.cc exports to WASM-safe in-memory storage.
core/wasm_shims/tooldata/tooldata_runtime_stubs.cc	Adapts LinuxCNC tooldata_nml.cc and tooldata_db.cc runtime entry points without native services.
test-linuxcnc-wasm-tooldata-link.sh	Links the wasm-safe tooldata shim against LinuxCNC tooldata runtime expectations.
test-linuxcnc-wasm-tooldata-common-link.sh	Links LinuxCNC tooldata_common.cc through the wasm-safe standalone probe.
test-linuxcnc-wasm-tooldata-mmap-symbols.sh	Compares wasm mmap backend exports with LinuxCNC tooldata_mmap.cc.
test-linuxcnc-wasm-tooldata-runtime-symbols.sh	Compares runtime stub exports with LinuxCNC tooldata_db.cc and tooldata_nml.cc.

External DB Stub Boundaries

• core/wasm_shims/tooldata/tooldata_runtime_stubs.cc must keep external DB services unavailable for browser-safe probes; it must not fork, exec, poll, or keep a live external database process.
• tooldata_db_init() must preserve the LinuxCNC MAX_DB_PROGRAM_ARGS=10, strtok_r() argument splitting, and access(..., X_OK) rejection edges from src/emc/tooldata/tooldata_db.cc before returning -1.
• tooldata_db_getall() must return -1 while db_live is false, and tooldata_db_notify() must return 0 without side effects while db_live is false.

Boundaries

• Tool table files referenced by switchkins INI files are source coverage only; they must not become browser API fields or generated switchkins aliases.
• WASM-safe tooldata shims must preserve the LinuxCNC export surface checked by symbol probes.
• WASM-safe tooldata runtime stubs must keep external database services unavailable while preserving LinuxCNC inactive-DB return values.
• Native and source-link paths must keep the full LinuxCNC src/emc/tooldata source directory tracked in the native RS274 manifest.
• build-wasm.sh must run tooldata link and symbol probes before copying browser artifacts.
• test-native.sh, test-linuxcnc-source-link.sh, and build-wasm.sh must run ./check-linuxcnc-tooldata-source-map.sh before consuming tooldata-backed native objects, source-linked LinuxCNC objects, or browser artifacts.
• The tooldata source-map guard validates LinuxCNC source/shim ownership and manifest drift only; it does not interpret G-code.

Checks

Run:

./check-linuxcnc-tooldata-source-map.sh
./test-native.sh
./test-linuxcnc-source-link.sh
./build-wasm.sh

check-linuxcnc-tooldata-source-map.sh keeps this document, LinuxCNC tooldata source anchors, manifest coverage, WASM shim/probe boundaries, and switchkins TOOL_TABLE source-only policy synchronized.