Goal

Improve debugging

Overview

• WebAssembly has a nifty custom section for Names http://webassembly.org/docs/binary-encoding/#name-section
• Chrome can debug wasm pretty well, it's possible to set breakpoints and even examine the stack.
• Runtime exceptions are hard to deal with, stack traces show plain indexes in the binary.

I'm pretty sure that encoding the names, would improve the DX here. Mainly improving runtime exceptions to actually point to correct functions/variable names which are broken. Also debugging a wasm module in the browser is kind of difficult without original names for locals/variables/functions.

Acceptance Criteria

• Add Name section to the emitter
• Name output should be enabled by default but could be disabled via some flag
• Unit tests. A test ensuring a named section is encoded would be ideal.