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46 lines
1.3 KiB
Markdown
46 lines
1.3 KiB
Markdown
# RJIT: Ruby JIT
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This document has some tips that might be useful when you work on RJIT.
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## Project purpose
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This project is for experimental purposes.
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For production deployment, consider using YJIT instead.
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## Supported platforms
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The following platforms are assumed to work. `linux-x86_64` is tested on CI.
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* OS: Linux, macOS, BSD
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* Arch: x86\_64
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## configure
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### --enable-rjit
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On supported platforms, `--enable-rjit` is set by default. You usually don't need to specify this.
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You may still manually pass `--enable-rjit` to try RJIT on unsupported platforms.
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### --enable-rjit=dev
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`--enable-rjit=dev` makes the interpreter slower, but enables `vm_insns_count` and `ratio_in_rjit`
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in `ruby --rjit-stats` to work.
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## make
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### rjit-bindgen
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If you see an "RJIT bindgen" GitHub Actions failure, please commit the `git diff` shown on the failed job.
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For doing the same thing locally, run `make rjit-bindgen` after installing libclang.
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macOS seems to have libclang by default. On Ubuntu, you can install it with `apt install libclang1`.
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## ruby
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### --rjit-stats
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This prints RJIT stats at exit. Some stats are available only with `--enable-rjit=dev` on configure.
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### --rjit-dump-disasm
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This dumps all JIT code. You need to install libcapstone before configure.
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* Ubuntu: `sudo apt-get install -y libcapstone-dev`
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* macOS: `brew install capstone`
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