subagent transcript

session 17f09f89 · workflow wf_4f35050d

delegated task

Rebuilding the FreeCAD-wasm PySide binding stack with NATIVE wasm exceptions (new-EH / try_table, -fwasm-exceptions -sWASM_LEGACY_EXCEPTIONS=0) to mat

▸ Magik

Rebuilding the FreeCAD-wasm PySide binding stack with NATIVE wasm exceptions (new-EH / try_table, -fwasm-exceptions -sWASM_LEGACY_EXCEPTIONS=0) to match the JSPI + wasm-EH toolchain (qt-jspi is try_table). Mixed EH => invalid module, so EVERY C++ archive must be new-EH with ZERO 'U invoke_' symbols. Env: source /opt/toolchains/emsdk/emsdk_env.sh AND export LD_LIBRARY_PATH=/home/magik6k/lcad-wasm/pyside-port/libshim (host shiboken6 needs the libclang shim). Working dir /home/magik6k/lcad-wasm/pyside-port. The build scripts there ALREADY have the new-EH flags applied. QtCore was already rebuilt new-EH (build/m2-qtcore/, validated). VERIFY each output archive: (a) it exists + has its PyInit symbol; (b) new-EH: emnm <archive> | grep -c 'U invoke_' MUST be 0 (invoke_ = JS-EH leftover = fail); (c) optional: extract one .o, link 'int main(){}' + the .o with 'em++ -fwasm-exceptions -sWASM_LEGACY_EXCEPTIONS=0 -sJSPI -sERROR_ON_UNDEFINED_SYMBOLS=0' and node -e 'WebAssembly.validate(...)' == true. Report the archive path, PyInit symbol presence, invoke_ count (must be 0), and pass/fail. BUILD the shiboken RUNTIME lib new-EH. Run: cd /home/magik6k/lcad-wasm/pyside-port && bash m0-build.sh (it rebuilds build/m0-minimal/libshiboken_wasm.a; a trailing browser probe against the old asyncify FreeCAD may fail — IGNORE that, you only care about the .a). VERIFY /home/magik6k/lcad-wasm/pyside-port/build/m0-minimal/libshiboken_wasm.a has 0 'U invoke_'. If m0-build.sh does more than build libshiboken and errors before producing it, isolate + run just the libshiboken compile+archive step (the script's compile of libshiboken .cpp -> libshiboken_wasm.a). Report.

Fable

thinking

I'm starting by examining the build script and environment to understand how to build the shiboken runtime library with new exception handling enabled.

Fable

I'll start by examining the build script and environment.

Fable

⚙ Bash

{"command": "cd /home/magik6k/lcad-wasm/pyside-port && ls -la && echo \"---M0 SCRIPT---\" && cat m0-build.sh", "description": "List pyside-port dir and show m0-build.sh"}

tool result

total 56
drwxr-xr-x 1 magik6k magik6k   560 Jul  6 01:59 [0m[01;34m.[0m
drwxr-xr-x 1 magik6k magik6k  2910 Jul  6 01:07 [01;34m..[0m
drwxr-xr-x 1 magik6k magik6k   314 Jul  6 02:00 [01;34mbuild[0m
-rw-r--r-- 1 magik6k magik6k  5984 Jul  6 01:59 build-module.sh
-rw-r--r-- 1 magik6k magik6k 26041 Jul  5 12:54 BUILD-PLAN.md
drwxr-xr-x 1 magik6k magik6k   230 Jul  5 12:45 [01;34memscripten-crossbuild[0m
drwxr-xr-x 1 magik6k magik6k   154 Jul  5 12:43 [01;34mfc-pyside-usage[0m
drwxr-xr-x 1  …[truncated]

Fable

⚙ Bash

{"command": "ls -la /home/magik6k/lcad-wasm/pyside-port/build/m0-minimal/ 2>/dev/null; echo \"---libshim---\"; ls -la /home/magik6k/lcad-wasm/pyside-port/libshim 2>/dev/null", "description": "Check existing m0 build output and libshim"}

tool result

total 1432
drwxr-xr-x 1 magik6k magik6k    656 Jul  5 13:25 [0m[01;34m.[0m
drwxr-xr-x 1 magik6k magik6k    314 Jul  6 02:00 [01;34m..[0m
-rw-r--r-- 1 magik6k magik6k   3438 Jul  5 13:25 containeruser.o
-rw-r--r-- 1 magik6k magik6k  22979 Jul  5 13:25 containeruser_wrapper.o
drwxr-xr-x 1 magik6k magik6k    236 Jul  5 13:25 [01;34mgen[0m
-rw-r--r-- 1 magik6k magik6k  13854 Jul  5 13:25 invisiblenamespace_visiblenamespace_valuetype_wrapper.o
-rw-r--r-- 1 magik6k magik6k   3568 Jul  5 13:25 i  …[truncated]

Fable

thinking

The script is there, though I notice the task mentions a trailing browser probe that doesn't appear in this m0-build.sh file — it just ends at the archives section. Let me run it and set up the environment to see what happens.

Fable

The script builds libshiboken and libminimal, then just lists archives (no browser probe in this version, so no issue). Let me run it with the proper environment.

Fable

⚙ Bash

{"command": "cd /home/magik6k/lcad-wasm/pyside-port && source /opt/toolchains/emsdk/emsdk_env.sh 2>/dev/null && export LD_LIBRARY_PATH=/home/magik6k/lcad-wasm/pyside-port/libshim && bash m0-build.sh 2>&1 | tail -40", "description": "Run m0-…

tool result

qt.shiboken: (minimal) CLANG v21/0.64 targeting "x86_64-pc-linux-gnu"/gnu, 64bit.
(minimal)  [104ms] Generated class model (7).                                  [[0;32mOK[0m]
(minimal)  [104ms] Generated enum model (0).                                   [[0;32mOK[0m]
(minimal)  [104ms] Generated namespace model (1).                              [[0;32mOK[0m]
(minimal)  [105ms] Resolved typedefs (2).                                      [[0;32mOK[0m]
(minimal)  [105ms] Fixed class inherit  …[truncated]

Fable

The build succeeded. Now let me verify the shiboken runtime archive: check the PyInit symbol and the invoke_ count.

Fable

⚙ Bash

{"command": "cd /home/magik6k/lcad-wasm/pyside-port && source /opt/toolchains/emsdk/emsdk_env.sh 2>/dev/null\nA=build/m0-minimal/libshiboken_wasm.a\necho \"== archive exists:\"; ls -la \"$A\"\necho \"== invoke_ count (must be 0):\"; emnm \"…

tool result

== archive exists:
-rw-r--r-- 1 magik6k magik6k 641828 Jul  6 02:03 build/m0-minimal/libshiboken_wasm.a
== invoke_ count (must be 0):
0
== sample of any invoke_ lines (should be empty):
== shiboken PyInit-ish / key runtime symbols:
000001f0 d .L__FUNCTION__._ZN8Shiboken10ObjectType20introduceWrapperTypeEP7_objectPKcS4_P11PyType_SpecPFvPvES2_j
00000140 d .L__func__._ZN8Shiboken19initShibokenSupportEP7_object
000000f7 d .L__func__._ZN8Shiboken4initEv
000018f3 T _Z17Sbk_GetPyOverridePKvP11_typeobje  …[truncated]

Fable

thinking

The libshiboken archive compiled successfully with no invoke_ symbols present, and the Shiboken runtime symbols are there as expected. I'm doing a thorough validation check now—extracting an object file to link with main and verify it works, counting the total object files in the archive, and checking for the module initialization symbol. Since libshiboken is a runtime library rather than a Python module, I need to look for the shiboken module init specifically.

Fable

Clean: 0 invoke_ symbols and Shiboken runtime symbols present. Let me check for the module init symbol and do the optional link+validate check.

Fable

⚙ Bash

{"command": "cd /home/magik6k/lcad-wasm/pyside-port && source /opt/toolchains/emsdk/emsdk_env.sh 2>/dev/null\nA=build/m0-minimal/libshiboken_wasm.a\necho \"== PyInit in libshiboken:\"; emnm \"$A\" 2>/dev/null | grep -i 'PyInit' || echo \"(n…

tool result

== PyInit in libshiboken:
(none - runtime lib, expected)
== object count:
29
== validate probe using minimal module (has PyInit_minimal), links libshiboken:
LINK FAIL
em++: error: helpers.o: No such file or directory ("helpers.o" was expected to be an input file, based on the commandline arguments provided)
node validate skipped
zshexit:1: parameter HISTDB_FD does not contain a file descriptor

Fable

thinking

I need to check what object files are available since helpers.o isn't there.

Fable

⚙ Bash

{"command": "cd /home/magik6k/lcad-wasm/pyside-port && source /opt/toolchains/emsdk/emsdk_env.sh 2>/dev/null\nA=/home/magik6k/lcad-wasm/pyside-port/build/m0-minimal/libshiboken_wasm.a\necho \"== objects:\"; emar t \"$A\"\nTMP=/tmp/claude-10…

tool result

== objects:
basewrapper.o
bindingmanager.o
bufferprocs_py37.o
debugfreehook.o
gilstate.o
helper.o
pep384ext.o
pep384impl.o
sbkarrayconverter.o
sbkbindingutils.o
sbkcontainer.o
sbkconverter.o
sbkcppstring.o
sbkenum.o
sbkerrors.o
sbkfeature_base.o
sbkmodule.o
sbknumpy.o
sbksmartpointer.o
sbkstaticstrings.o
sbkstring.o
sbktypefactory.o
shibokenbuffer.o
signature_extend.o
signature_globals.o
signature_helper.o
signature.o
threadstatesaver.o
voidptr.o
== picking: basewrapper.o
LINK OK
validate: true
  …[truncated]

Fable

All checks pass. The link+validate probe returns `true`. Summary: The shiboken runtime lib was rebuilt new-EH successfully. - Archive: `/home/magik6k/lcad-wasm/pyside-port/build/m0-minimal/libshiboken_wasm.a` (641828 bytes, 29 objects) - `U invoke_` count: 0 (no JS-EH leftovers) - Shiboken runtime symbols present (no PyInit — expected, it's a runtime lib not a Python module; the sibling `libminimal_wasm.a` carries `PyInit_minimal`) - Optional validation: extracted `basewrapper.o`, linked with `int main(){}` under `-fwasm-exceptions -sWASM_LEGACY_EXCEPTIONS=0 -sJSPI`, and `WebAssembly.validate` returned `true`

Fable

⚙ StructuredOutput

{"component": "shiboken-runtime (libshiboken_wasm.a)", "ok": true, "invokeCount": 0, "archivePath": "/home/magik6k/lcad-wasm/pyside-port/build/m0-minimal/libshiboken_wasm.a", "pyinitPresent": false, "validated": true, "notes": "Ran m0-build…

tool result

Structured output provided successfully