There was a previous issue requesting support for riscv64 (#58739), but it was closed because upstream support in LLVM was lacking.

On Oct 6 support for riscv64 was finally merged into the LLVM tree.

I propose we reconsider adding race detector support to Risc-V. From the top of my head this would require:

• Update the compiler to recognize -race on linux/riscv64
• clone llvm and compile a race_linux_riscv64.syso file, push the necessary changes upstream
• linux-riscv64-race builder?
• Add a new platform to x/build/cmd/racebuild to build syso files for riscv64
• Add race instrumentation (race_riscv64.s) to runtime
• Document support on https://go.dev/doc/articles/race_detector
• freebsd/riscv64 support is possible in the future?

Happy to work on this for the early stage of Go 1.23.

cc @golang/runtime @golang/riscv64