Weekly report-July 17,2023

1. Optimize some virtual machine function interfaces for easy external library access

- Add parameter validation for critical virtual machine interfaces to ensure valid inputs

- Provide interface documents with detailed comments on parameters, return values, functions, etc.

- Offer sample code to demonstrate proper interface usage

- Design unified error codes for easy exception handling by interface users

- Support asynchronous non-blocking interfaces to improve throughput

2. Fix byte code virtual machine stack data exceptions, add stack depth checks

- Add stack overflow checks to prevent out-of-bounds reads

- Catch exceptions during bytecode execution to prevent VM crashes

- Increase stack depth logging to ease debugging  

- Optimize stack expansion policy to reserve space in advance

- Use circular stack to reuse memory

- Add stack stress tests to evaluate performance

- Design stack data caching to reduce accesses