StillHammer
aefd7921b2
fix: Critical race conditions in ThreadedModuleSystem and logger
Fixed two critical race conditions that prevented multi-threaded module execution:
## Bug #1: ThreadedModuleSystem::registerModule() race condition
**Symptom:** Deadlock on first processModules() call
**Root Cause:** Worker thread started before being added to workers vector
**Fix:** Add worker to vector BEFORE spawning thread (src/ThreadedModuleSystem.cpp:102-108)
Before:
- Create worker → Start thread → Add to vector (RACE!)
- Thread accesses workers[index] before push_back completes
After:
- Create worker → Add to vector → Start thread (SAFE)
- Thread guaranteed to find worker in vector
## Bug #2: stillhammer::createLogger() race condition
**Symptom:** Deadlock when multiple threads create loggers simultaneously
**Root Cause:** Check-then-register pattern without mutex protection
**Fix:** Added static mutex around spdlog::get() + register_logger() (external/StillHammer/logger/src/Logger.cpp:94-96)
Before:
- Thread 1: check → create → register
- Thread 2: check → create → register (RACE on spdlog registry!)
After:
- Mutex protects entire check-then-register critical section
## Validation & Testing
Added comprehensive test suite:
- test_threaded_module_system.cpp (6 unit tests)
- test_threaded_stress.cpp (5 stress tests: 50 modules × 1000 frames)
- test_logger_threadsafe.cpp (concurrent logger creation)
- benchmark_threaded_vs_sequential.cpp (performance comparison)
- docs/THREADED_MODULE_SYSTEM_VALIDATION.md (full validation report)
All tests passing (100%):
- ThreadedModuleSystem: ✅ 0.15s
- ThreadedStress: ✅ 7.64s
- LoggerThreadSafe: ✅ 0.13s
## Impact
ThreadedModuleSystem now PRODUCTION READY:
- Thread-safe module registration
- Stable parallel execution (validated with 50,000+ operations)
- Hot-reload working (100 cycles tested)
- Logger thread-safe for concurrent module initialization
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>