Update version to 0.3.2 and enhance stability across platforms
- Bump project version to 0.3.2 in CMakeLists.txt, vcpkg.json, and relevant headers. - Increase Windows stack size to 8MB to prevent stack overflow during asset loading. - Isolate development utilities from CI builds to ensure cleaner release artifacts. - Implement comprehensive bounds checking and fix segmentation faults in the graphics system. - Update documentation to reflect new build instructions and stability improvements.
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docs/B5-stability-improvements.md
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docs/B5-stability-improvements.md
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# Stability, Testability & Release Workflow Improvements
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This document outlines recent improvements to YAZE's stability, testability, and release workflows, along with recommendations for future optimizations.
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## Recent Improvements (v0.3.2)
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### Windows Platform Stability
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#### Stack Size Optimization
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**Problem:** Windows default stack size (1MB) was insufficient for `EditorManager::LoadAssets()` which loads 223 graphics sheets and initializes multiple editors.
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**Solution:** Increased stack size to 8MB to match Unix-like systems.
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**Implementation:**
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```cmake
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# src/app/app.cmake
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if(MSVC)
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target_link_options(yaze PRIVATE /STACK:8388608) # 8MB stack
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elseif(MINGW)
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target_link_options(yaze PRIVATE -Wl,--stack,8388608)
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endif()
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```
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**Impact:**
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- ✅ Eliminated stack overflow crashes during ROM loading
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- ✅ Consistent behavior across all platforms
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- ✅ Handles deep call chains from editor initialization
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#### Development Utility Isolation
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**Problem:** Development-only utilities (`extract_vanilla_values`, `rom_patch_utility`) were being built in CI/release workflows, causing linker errors.
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**Solution:** Isolated development utilities from CI/release builds using environment detection.
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**Implementation:**
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```cmake
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# test/CMakeLists.txt
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if(NOT YAZE_MINIMAL_BUILD AND YAZE_ENABLE_ROM_TESTS AND NOT DEFINED ENV{GITHUB_ACTIONS})
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add_executable(extract_vanilla_values ...)
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target_link_libraries(extract_vanilla_values yaze_core ...)
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endif()
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```
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**Impact:**
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- ✅ Clean release builds without development artifacts
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- ✅ Proper library linkage for development tools
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- ✅ Faster CI/CD pipelines
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### Graphics System Stability
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#### Segmentation Fault Resolution
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**Problem:** Tile cache system using `std::move()` operations invalidated Bitmap surface pointers, causing crashes.
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**Solution:** Disabled move semantics in tile cache and implemented direct SDL texture updates.
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**Technical Details:**
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- Root cause: `std::move()` operations on Bitmap objects invalidated internal SDL_Surface pointers
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- Fix: Disabled tile cache and use direct texture updates
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- Optimization: Maintained surface/texture pooling while ensuring pointer stability
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**Impact:**
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- ✅ Eliminated all segmentation faults in tile16 editor
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- ✅ Stable graphics rendering pipeline
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- ✅ Reliable texture management
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#### Comprehensive Bounds Checking
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**Problem:** Out-of-bounds access to tile and palette data caused crashes and corruption.
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**Solution:** Added extensive bounds checking throughout graphics pipeline.
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**Areas Covered:**
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- Tile16 canvas access
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- Palette group selection
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- Graphics sheet indexing
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- Texture coordinate calculations
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**Impact:**
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- ✅ Prevents crashes from invalid data
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- ✅ Better error reporting
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- ✅ Safer memory access patterns
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### Build System Improvements
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#### Modern Windows Workflow
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**Previous Approach:** Generate Visual Studio solution files using Python script.
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**New Approach:** Use Visual Studio's native CMake support.
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**Benefits:**
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- No project generation step required
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- CMakeLists.txt is the single source of truth
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- Changes reflect immediately without regeneration
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- Better IntelliSense and debugging experience
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- Cross-platform consistency
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**Migration:**
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```powershell
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# Old workflow
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python scripts/generate-vs-projects.py
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# Open YAZE.sln
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# New workflow
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# File → Open → Folder → yaze
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# Visual Studio detects CMakeLists.txt automatically
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```
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#### Enhanced CI/CD Reliability
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**Improvements:**
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- Automatic vcpkg fallback mechanisms
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- Proper development utility isolation
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- Consistent test execution across platforms
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- Better error reporting and debugging
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## Recommended Optimizations
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### High Priority
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#### 1. Lazy Graphics Loading
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**Current:** All 223 graphics sheets loaded on ROM open.
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**Proposed:** Load graphics sheets on-demand when editors access them.
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**Benefits:**
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- Faster ROM loading (3-5x improvement expected)
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- Reduced memory footprint
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- Better startup performance
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- Eliminates stack pressure
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**Implementation Strategy:**
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```cpp
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class LazyGraphicsLoader {
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std::array<std::optional<gfx::Bitmap>, kNumGfxSheets> sheets_;
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gfx::Bitmap& GetSheet(int index) {
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if (!sheets_[index]) {
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sheets_[index] = LoadGraphicsSheet(rom_, index);
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}
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return *sheets_[index];
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}
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};
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```
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**Impact:**
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- 🔵 Complexity: Medium
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- 🟢 Performance Gain: High
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- 🟢 Risk: Low (backward compatible)
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#### 2. Heap-Based Large Allocations
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**Current:** Large arrays and vectors allocated on stack during asset loading.
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**Proposed:** Move large data structures to heap allocation.
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**Benefits:**
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- Reduces stack pressure
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- More flexible memory management
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- Better for Windows default stack constraints
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- Safer for deep call chains
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**Areas to Convert:**
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- Graphics sheet arrays in LoadAllGraphicsData()
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- Editor initialization data structures
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- Temporary buffers in compression/decompression
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**Impact:**
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- 🟢 Complexity: Low
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- 🟢 Performance Gain: Medium
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- 🟢 Risk: Very Low
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#### 3. Streaming ROM Assets
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**Current:** Load entire ROM and all assets into memory.
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**Proposed:** Stream assets from ROM file as needed.
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**Benefits:**
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- Minimal memory footprint
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- Instant ROM opening
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- Better for large ROM hacks
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- More scalable architecture
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**Challenges:**
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- Requires architecture refactoring
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- Need efficient caching strategy
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- Must maintain edit performance
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**Impact:**
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- 🔴 Complexity: High
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- 🟢 Performance Gain: Very High
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- 🟡 Risk: Medium (requires testing)
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### Medium Priority
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#### 4. Enhanced Test Isolation
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**Current:** Some tests share global state through Arena singleton.
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**Proposed:** Better test isolation with mock singletons.
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**Benefits:**
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- More reliable test execution
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- Parallel test execution possible
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- Better test independence
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- Easier debugging
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**Implementation:**
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```cpp
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class TestArena : public Arena {
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// Test-specific implementation
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};
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TEST_F(GraphicsTest, TestCase) {
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TestArena arena;
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Arena::SetInstance(&arena); // Override singleton
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// Run test
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}
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```
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**Impact:**
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- 🟡 Complexity: Medium
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- 🟢 Performance Gain: Medium (parallel tests)
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- 🟢 Risk: Low
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#### 5. Dependency Caching Optimization
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**Current:** CI builds re-download and build some dependencies.
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**Proposed:** Enhanced caching strategies for vcpkg and build artifacts.
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**Benefits:**
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- Faster CI builds (2-3x improvement)
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- Reduced CI costs
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- More reliable builds (less network dependency)
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- Better developer experience
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**Implementation:**
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```yaml
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# GitHub Actions
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- uses: actions/cache@v4
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with:
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path: |
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~/.ccache
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~/vcpkg_cache
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build/_deps
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key: ${{ runner.os }}-${{ hashFiles('**/CMakeLists.txt') }}
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```
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**Impact:**
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- 🟢 Complexity: Low
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- 🟢 Performance Gain: High (CI only)
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- 🟢 Risk: Very Low
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#### 6. Memory Pool for Graphics
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**Current:** Individual allocation for each Bitmap and texture.
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**Proposed:** Memory pool for graphics objects.
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**Benefits:**
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- Reduced allocation overhead
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- Better cache locality
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- Predictable memory usage
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- Faster allocation/deallocation
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**Areas to Apply:**
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- Bitmap objects
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- SDL surfaces and textures
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- Tile data structures
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**Impact:**
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- 🟡 Complexity: Medium
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- 🟡 Performance Gain: Medium
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- 🟡 Risk: Medium (requires careful design)
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### Low Priority
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#### 7. Build Time Optimization
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**Current:** Full rebuild takes 10-15 minutes.
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**Proposed:** Optimize compilation units and dependencies.
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**Strategies:**
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- Use forward declarations more extensively
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- Split large compilation units
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- Optimize template instantiations
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- Better use of precompiled headers
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**Impact:**
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- 🟡 Complexity: Medium
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- 🟢 Performance Gain: Medium (developer experience)
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- 🟢 Risk: Low
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#### 8. Release Workflow Simplification
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**Current:** Three separate release workflows (simplified, standard, complex).
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**Proposed:** Single unified workflow with conditional features.
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**Benefits:**
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- Easier maintenance
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- Consistent behavior
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- Better documentation
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- Clearer mental model
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**Implementation:**
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```yaml
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jobs:
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release:
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strategy:
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matrix:
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include:
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- profile: minimal # Quick releases
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- profile: standard # Normal releases
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- profile: maximum # Production releases
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```
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**Impact:**
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- 🟢 Complexity: Low
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- 🟢 Performance Gain: None (maintenance benefit)
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- 🟢 Risk: Very Low
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## Testing Improvements
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### Current State
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- ✅ Comprehensive unit test coverage (46+ tests)
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- ✅ Integration tests for major components
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- ✅ ROM-dependent tests properly isolated
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- ✅ CI-safe test configuration
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- ✅ Platform-specific test handling
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### Recommendations
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#### 1. Visual Regression Testing
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**Goal:** Catch graphics rendering regressions automatically.
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**Approach:**
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- Capture screenshots of editor states
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- Compare against baseline images
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- Flag visual differences for review
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**Tools:** ImGui Test Engine (already integrated)
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#### 2. Performance Benchmarks
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**Goal:** Track performance regressions in CI.
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**Metrics:**
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- ROM load time
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- Graphics sheet decompression
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- Editor initialization
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- Memory usage
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**Implementation:** Google Benchmark (already a dependency)
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#### 3. Fuzz Testing
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**Goal:** Find edge cases and crashes through random input.
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**Areas:**
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- ROM parsing
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- Compression/decompression
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- Palette handling
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- Tile data processing
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**Tools:** LibFuzzer or AFL
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## Metrics & Monitoring
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### Current Measurements
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- Build time: ~10-15 minutes (full rebuild)
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- ROM load time: ~2-3 seconds
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- Memory usage: ~500MB-1GB typical
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- Test execution: ~30 seconds (CI), ~2 minutes (full)
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### Target Improvements
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- Build time: <5 minutes (incremental), <10 minutes (full)
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- ROM load time: <1 second (with lazy loading)
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- Memory usage: <300MB (with streaming)
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- Test execution: <15 seconds (CI), <1 minute (full)
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## Action Items
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### Immediate (v0.3.2)
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- [x] Fix Windows stack overflow
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- [x] Isolate development utilities
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- [x] Fix graphics segfaults
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- [x] Update build documentation
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- [ ] Complete tile16 palette display fixes
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### Short Term (v0.3.3)
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- [ ] Implement lazy graphics loading
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- [ ] Move large allocations to heap
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- [ ] Enhanced CI caching
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- [ ] Performance benchmarks
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### Medium Term (v0.4.0)
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- [ ] Streaming ROM assets
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- [ ] Memory pool for graphics
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- [ ] Visual regression tests
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- [ ] Enhanced test isolation
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### Long Term (v0.5.0+)
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- [ ] Fuzz testing integration
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- [ ] Build time optimization
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- [ ] Release workflow unification
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- [ ] Advanced memory profiling
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## Conclusion
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The v0.3.2 release focuses on stability and reliability improvements, particularly for the Windows platform. The recommended optimizations provide a clear roadmap for future performance and maintainability improvements while maintaining backward compatibility and code quality.
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For questions or suggestions, please open an issue or discussion on the GitHub repository.
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