libjdk is a comprehensive C++ implementation of the Java Development Kit (JDK), providing native C++ libraries that mirror the functionality of Java's core libraries and modules. While it provides Java-like APIs, it runs as native C++ code without requiring a Java Virtual Machine.
This project provides a complete C++ implementation of Java's instrumentation functionality, including:
- Class Instrumentation: Runtime class modification and monitoring
- Agent Support: Java agent framework
- Bytecode Manipulation: Runtime bytecode modification
- Performance Monitoring: Runtime performance monitoring
- Memory Tracking: Memory usage tracking and analysis
- Performance: High-performance instrumentation with minimal overhead
- ✅ Cross-platform Support: Windows, Linux, and macOS
- ✅ CMake Build System: Modern, portable build configuration
- ✅ Shared/Static Libraries: Flexible linking options
- ✅ Comprehensive Testing: Extensive test suite included
- ✅ OpenJDK Compatible: Based on OpenJDK 17.35
- ✅ GPL Licensed: Free software with Classpath exception
- java.base: Core Java functionality (required)
java.instrument/
├── main/ # Main source code
│ ├── classes/ # Java class implementations
│ ├── include/ # Header files
│ ├── native/ # Native implementations
│ └── dependencies.txt # Module dependencies
├── test/ # Test suite
├── legal/ # Legal notices and licenses
└── CMakeLists.txt # Build configuration
- Fork the repository
- Create a feature branch
- Make your changes
- Add tests for new functionality
- Ensure all tests pass
- Submit a pull request
This project is licensed under the GNU General Public License v2 with the Classpath exception, allowing linking with proprietary software. See the LICENSE file for details.
This project includes code from various open source projects. See the legal/ directory for detailed licensing information for each component.