Talk details

One of the recurrent themes from my other compiler workshops is “can you debug it ?” , so in an attempt at getting that sorted I simply ended up running and writing tests , therefore closing the loop on that OpenJDK compiler dev-loop.
So in my series of hacking on the Java compiler, we will focus this session on adding simple syntax updates and explore Jtreg the unit/regression test harness for OpenJDK.
Steps

• Task 0 : setup environment and IDE for
• JTreg
• OpenJDK
• Task 1 : run an existing test suite
• Task 2 : syntax sugar support and testing it

for example, enhanced map syntax

Map capitals = { 
  "norway" : "oslo", 
  "sweden": "stockholm", 
  "morocco": "rabat", 
  "australia": "canberra, 
}

• Task 3 : run the tests inside the IDE
• Task 4 : run the tests with a debugger attached

Full documentation will be provided
Necessary Tools

• GitHub account
• Java 20 / Java 21
• Docker (which would provide the required Java and Maven environment dependencies)

Takeaways

• Get some exposure to OpenJDK development loop
• Learn to navigate around OpenJDK project