Looking for a way to report unhandled c++ exceptions to 3rd party crash reporting system

[kurrak]

This is a question, not a bug.

We're trying to find a generic way to report stack traces for all exceptions unhandled in c++ (meaning: also for c++ exceptions that are handled in JS). We're using -fwasm-exceptions and -sEXCEPTION_STACK_TRACES.

We found out that Emscripten's ___throw_exception_with_stack_trace JS function is called whenever c++ exception is thrown. What we'd like to do is plug into this function, so we can get a stack trace and send it to 3rd party crash reporting system.

We've been trying different approaches, but had little to no success. We're looking for any guidance, or the reason for why it is bad/wrong idea in the first place.

Version of emscripten/emsdk:

emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.61 (67fa4c16496b157a7fc3377afd69ee0445e8a6e3)
clang version 19.0.0git (https:/github.com/llvm/llvm-project 7cfffe74eeb68fbb3fb9706ac7071f8caeeb6520)
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: /Users/kurak/Developer/emsdk/upstream/bin