The directory should change from "src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/risv64" to "src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/riscv64"
https://github.com/openjdk/riscv-port-jdk11u/tree/riscv-port/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/risv64
https://github.com/openjdk/riscv-port-jdk11u/tree/riscv-port/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/risv64