en Copyright 2015 Java http://172.16.0.5:8080/history/wasmtime-44.0.1/crates/test-programs/src/bin/debugger_component.rs#133a0ef4 Debugging: add the debug-main world. (#12756)* Debugging: add the debug-main world.This PR "draws the rest of the owl" for the debug-mainworld (bytecodealliance/rfcs#45). This includes a WIT world that hostsdebug components that have access to "host debug powers" via adebugging API, and the ability to load such a debug-component and giveit control of the main program as a debuggee when using `wasmtimerun`.The WIT is namespaced to `bytecodealliance:wasmtime` and is slightlyaspirational in places: for example, the host does not yet implementinjection of early return values or exception-throws. I intend to fillout a series of TODO issues once this all lands to track followup("post-MVP") work.This PR does not include any debug components. I separately have agdbstub component, with which I tested and co-developed this host-sideimplementation. My plan is to land it in a followup PR as a componentthat will be embedded in/shipped with the Wasmtime CLI and availableunder an easy-to-use CLI option. Once we have that gdbstub component,we can also implement end-to-end integration tests that boot up LLDBand run through an expected interaction. (Separately, thoseintegration tests will require a release of wasi-sdk to ship an LLDBbinary that we can use.) As such, there are no real tests in this PR:interesting behaviors only really occur with a full end-to-end flow.The integration with the CLI is a little awkward (we internally buildanother `wasmtime run` command that invokes the debug component, andtie it together with the debuggee via a special `invoke_debugger` API;this seemed less bad than reworking all of the WASI setup to be morereusable). Happy to take more ideas here.* Review feedback.* Review feedback.* Review feedback: update vendor-wit.sh.* Review feedback: -Ddebugger-arg= -> -Darg=.* Review feedback.* Review feedback.* Review feedback: factor host.rs into several submodules.* Review feedback: rename Debugger to Debuggee on host side.* Review feedback: split inherit_stdin_stdout, and add corresponding options for the debug component.* Review feedback.* Review feedback.* Add simple debug-component tests.* Add wasm32-wasip2 target in a few places in CI* Cargo vets for wstd dependency.* Add wasm32-wasip2 in more places* fix debug-component test dependence on componentization byte offsets* Review feedback.* Fix cancel-safety of EventFuture.* Fix: Interrupted events should only occur after interrupt(), not on every epoch yield.* Review feedback.* Review feedback: strip down WASI imports in debugger world.* fold debugger test component back into wasip1 + adapter test artifact compilation flow List of files: /wasmtime-44.0.1/crates/test-programs/src/bin/debugger_component.rs Fri, 13 Mar 2026 18:58:17 +0000 Chris Fallin <chris@cfallin.org>