I have successfully compiled CPython 2.7 with Emscripten to a good enough
state that I can run basic Python computations and prints. However I am
encountering an unusual issue when performing a more advanced Python
computation.
Consider the following Python code:
* import pydoc*
* pydoc.help()*
Running that code inside the Emscripten-compiled CPython interpreter
results in at least 24 different Python modules being imported as a side
effect. Some of these Python modules are implemented by *.so files that are
dynamically loaded from the web server via synchronous XHR and passed to
C's *dlopen*.
In particular when CPython tries to load the *token.py* module (or perhaps
the unknown module after it), I receive what appears to be an internal
Emscripten error:
* Error in loading dynamic library: TypeError:
Runtime.alignFunctionTables is not a function*
I've traced this error down to *emscripten-master/src/library.js*:
* dlopen: function(filename, flag) {*
* ...*
* try {*
* var lib_module = eval(lib_data)(*
* Runtime.alignFunctionTables(),*
* Module*
* );*
* } catch (e) {*
*#if ASSERTIONS*
* Module.printErr('Error in loading dynamic library: ' + e);*
*#endif*
* DLFCN.errorMsg = 'Could not evaluate dynamic lib: ' + filename;*
* return 0;*
* }*
* ...*
I'm wondering if this kind of error might be related to all of the compile
options I am using. For reference I'm compiling with:
*$ emcc -O0 python.bc -s INVOKE_RUN=0 --pre-js fs.js -s
EXPORTED_FUNCTIONS=... -s ASSERTIONS=2 -s SAFE_HEAP=1 -s
ALIASING_FUNCTION_POINTERS=0 -s EMULATE_FUNCTION_POINTER_CASTS=1 -o
dist/python.js*
Any insight as to what "Runtime.alignFunctionTables is not a function"
could be caused by?
- David
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