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Playground: Emscripten debugging infrastructure (DWARF, source maps, debug dumps) #238

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opened 2026-02-02 20:51:12 +00:00 by john · 0 comments
john commented 2026-02-02 20:51:12 +00:00
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Overview

Add comprehensive debugging infrastructure for the Emscripten/WASM builds to help developers troubleshoot issues in the playground and standalone game deployments.

Scope

Build Configuration

  • Add CMake options for debug WASM builds with DWARF symbols
  • Configure -gsource-map and --emit-symbol-map for source mapping
  • Add -sASSERTIONS=2 -sSAFE_HEAP=1 -sSTACK_OVERFLOW_CHECK=2 for debug builds
  • Keep -g2 for release builds (minimal debug info for stack traces)

Console Debug Functions

Expose C++ functions callable from browser console:

EMSCRIPTEN_KEEPALIVE void dump_python_globals();    // Print all Python globals
EMSCRIPTEN_KEEPALIVE void dump_loaded_modules();    // List loaded Python modules

With JavaScript wrappers:

window.dumpPythonGlobals();
window.dumpLoadedModules();

Documentation

  • Document Chrome DWARF extension installation
  • Explain how to use DevTools Sources panel with C++ source mapping
  • Add debug build instructions to CLAUDE.md

References

Related

Part of playground improvement initiative documented in docs/PLAYGROUND_IMPROVEMENT_PLAN.md (Phase 3)

## Overview Add comprehensive debugging infrastructure for the Emscripten/WASM builds to help developers troubleshoot issues in the playground and standalone game deployments. ## Scope ### Build Configuration - Add CMake options for debug WASM builds with DWARF symbols - Configure `-gsource-map` and `--emit-symbol-map` for source mapping - Add `-sASSERTIONS=2 -sSAFE_HEAP=1 -sSTACK_OVERFLOW_CHECK=2` for debug builds - Keep `-g2` for release builds (minimal debug info for stack traces) ### Console Debug Functions Expose C++ functions callable from browser console: ```cpp EMSCRIPTEN_KEEPALIVE void dump_python_globals(); // Print all Python globals EMSCRIPTEN_KEEPALIVE void dump_loaded_modules(); // List loaded Python modules ``` With JavaScript wrappers: ```javascript window.dumpPythonGlobals(); window.dumpLoadedModules(); ``` ### Documentation - Document Chrome DWARF extension installation - Explain how to use DevTools Sources panel with C++ source mapping - Add debug build instructions to CLAUDE.md ## References - [Emscripten Debugging Documentation](https://emscripten.org/docs/porting/Debugging.html) - [Chrome WASM Debugging](https://developer.chrome.com/docs/devtools/wasm) - [DWARF Chrome Extension](https://developer.chrome.com/blog/wasm-debugging-2020) ## Related Part of playground improvement initiative documented in `docs/PLAYGROUND_IMPROVEMENT_PLAN.md` (Phase 3)
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Alpha Release Requirement

This issue is a blocker to 0.1 Alpha release of McRogueFace.

  
Bugfix

   
Demo Target

Functionality to demonstrate; Depends on new features, but this issue isn't for writing them.

  
Documentation

   
Major Feature

Significant time and effort required.

  
Minor Feature

Some effort required to create or overhaul functionality.

  
priority:tier1-active

Current development focus - critical path to v1.0

  
priority:tier2-foundation

Important foundation work - not blocking v1.0

  
priority:tier3-future

Future features - deferred until after v1.0

  
priority:tier4-deferred

   
Refactoring & Cleanup

no new functionality, just improving the codebase.

  
system:animation

Animation and property interpolation

  
system:documentation

Documentation infrastructure

  
system:grid

Grid system and spatial containers

  
system:input

Input handling and events

  
system:performance

Performance optimization and profiling

  
system:procgen

Procedural Generation (Noise, BSP, Heightmap)

  
system:python-binding

Python/C++ binding layer

  
system:rendering

Rendering pipeline and visuals

  
system:ui-hierarchy

UI component hierarchy and composition

  
Tiny Feature

quick and easy - a few lines or with little interconnection around the codebase

  
workflow:blocked

Blocked by other work - waiting on dependencies

  
workflow:needs-benchmark

Needs performance testing and benchmarks

  
workflow:needs-documentation

Needs documentation before or after implementation

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priority:tier1-active
priority:tier2-foundation
priority:tier3-future
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Refactoring & Cleanup
system:animation
system:documentation
system:grid
system:input
system:performance
system:procgen
system:python-binding
system:rendering
system:ui-hierarchy
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workflow:blocked
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john/McRogueFace#238
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