[Cranelift] add transopt.isle to ISLE compilations#1
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bongjunj
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Apr 13, 2026
* Debugging: add builtin gdbstub component. This adds a debug component that makes use of the debug-main world defined in bytecodealliance#12756 and serves the gdbstub protocol, with Wasm extensions, compatible with LLDB. This component is built and included inside the Wasmtime binary, and is loaded using the lower-level `-D debugger=...` debug-main option; the user doesn't need to specify the `.wasm` adapter component. Instead, the user simply runs `wasmtime run -g <PORT> program.wasm ...` and Wasmtime will load and prepare to run `program.wasm` as the debuggee, waiting for a gdbstub connection on the given TCP port before continuing. The workflow is: ``` $ wasmtime run -g 1234 program.wasm [ wasmtime starts and waits for connection ] $ /opt/wasi-sdk/bin/lldb # use LLDB from wasi-sdk release 32 or later (lldb) process connect --plugin wasm connect://localhost:1234 Process 1 stopped * thread #1, stop reason = signal SIGTRAP frame #0: 0x40000000000001cc -> 0x40000000000001cc: unreachable 0x40000000000001cd: end 0x40000000000001ce: local.get 0 0x40000000000001d0: call 13 (lldb) si Process 1 stopped * thread #1, stop reason = instruction step into frame #0: 0x4000000000000184 -> 0x4000000000000184: block 0x4000000000000186: block 0x4000000000000188: global.get 1 0x400000000000018e: i32.const 3664 [ ... ] ``` This makes use of the `gdbstub` third-party crate, into which I've upstreamed support for the Wasm extensions in daniel5151/gdbstub#188, daniel5151/gdbstub#189, daniel5151/gdbstub#190, and daniel5151/gdbstub#192. (I'll add vets as part of this PR.) * cargo vets. * Handle Trap events as well as breakpoints. * Review feedback. * Fix gdbstub artifact build to make it publishable (by disabling it when isolated crates are used). * Review feedback. * fix published-crates list * For now, empty gdbstub data but no compile error when artifact crate is published. * add some more Cargo metadata: version for artifact crate dep
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src/opts/transopt.isleto the ISLE opt input list incranelift/codegen/meta/src/isle.rsv-transopt-onlyactually compiles and uses the transopt ruleset