RuntimeError: abort(Assertion failed: Missing signature argument to addFunction: ...) when building with -g

[ravisumit33]

I am trying to enable debugging for wasm in chrome. So, I compiled and linked my code with -g instead of -O3 which I was doing earlier. But I am facing this strange error below at runtime.

I also tried adding gettimeofday inside DEFAULT_LIBRARY_FUNCS_TO_INCLUDE and _gettimeofday in EXPORTED_FUNCTIONS but the issue still persists. It seems that this function is there in the generated js but its signature (sig) isn't.

[ravisumit33]

@kripken @sbc100 This seems to be the only blocker in enabling debugging support in my build. If I manually add gettimeofday.sig = 'ii' in the generated js everything works fine. Any idea why signature is not getting included automatically by emscripten ?

[sbc100]

We would need to add explicit signature to src/library.js. Something like gettimeofday__sig: 'ii', around like 1456.

These explicit signatures should only be needed in certain cases, and only IIRC when using dynamic linking. Can you confirm using are using dynamic linking (building with MAIN_MODULE)?

[ravisumit33]

@sbc100 Yes, we are using dynamic linking (building with MAIN_MODULE=2).

[sbc100]

Would you mind sending a PR to add __sig to gettimeofday?

[ravisumit33]

Sure, will send a PR adding line gettimeofday__sig: 'ii' to src/library.js.