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webassembly/api: Allocate code data on C heap when running Python code.

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Otherwise Emscripten allocates it on the Emscripten C stack, which will
overflow for large amounts of code.

Fixes issue #14307.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George
2024-04-17 14:25:48 +10:00
parent 45848f77ca
commit 9c7f0659e2
2 changed files with 16 additions and 8 deletions
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16
ports/webassembly/api.js
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@@ -127,23 +127,31 @@ export async function loadMicroPython(options) {
},
pyimport: pyimport,
runPython(code) {
const len = Module.lengthBytesUTF8(code);
const buf = Module._malloc(len + 1);
Module.stringToUTF8(code, buf, len + 1);
const value = Module._malloc(3 * 4);
Module.ccall(
"mp_js_do_exec",
"number",
["string", "pointer"],
[code, value],
["pointer", "number", "pointer"],
[buf, len, value],
);
Module._free(buf);
return proxy_convert_mp_to_js_obj_jsside_with_free(value);
},
runPythonAsync(code) {
const len = Module.lengthBytesUTF8(code);
const buf = Module._malloc(len + 1);
Module.stringToUTF8(code, buf, len + 1);
const value = Module._malloc(3 * 4);
Module.ccall(
"mp_js_do_exec_async",
"number",
["string", "pointer"],
[code, value],
["pointer", "number", "pointer"],
[buf, len, value],
);
Module._free(buf);
return proxy_convert_mp_to_js_obj_jsside_with_free(value);
},
replInit() {