Alex Crichton 203d86f343 Add tests for the interface types output of wasm-bindgen (#1898) ... * Add tests for the interface types output of wasm-bindgen This commit expands the test suite with assertions about the output of the interface types pass in wasm-bindgen. The goal here is to actually assert that we produce the right output and have a suite of reference files to show how the interface types output is changing over time. The `reference` test suite added in the previous PR has been updated to work for interface types as well, generating `*.wit` file assertions which are printed via the `wit-printer` crate on crates.io. Along the way a number of bugs were fixed with the interface types output, such as: * Non-determinism in output caused by iteration of a `HashMap` * Avoiding JS generation entirely in interface types mode, ensuring that we don't export extraneous intrinsics that aren't otherwise needed. * Fixing location of the stack pointer for modules where it's GC'd out. It's now rooted in the aux section of wasm-bindgen so it's available to later passes, like the multi-value pass. * Interface types emission now works in debug mode, meaning the `--release` flag is no longer required. This previously did not work because the `__wbindgen_throw` intrinsic was required in debug mode. This comes about because of the `malloc_failure` and `internal_error` functions in the anyref pass. The purpose of these functions is to signal fatal runtime errors, if any, in a way that's usable to the user. For wasm interface types though we can replace calls to these functions with `unreachable` to avoid needing to import the intrinsic. This has the accidental side effect of making `wasm_bindgen::throw_str` "just work" with wasm interface types by aborting the program, but that's not actually entirely intended. It's hoped that a split of a `wasm-bindgen-core` crate would solve this issue for the future. * Run the wasm interface types validator in tests * Add more gc roots for adapter gc * Improve stack pointer detection The stack pointer is never initialized to zero, but some other mutable globals are (TLS, thread ID, etc), so let's filter those out.		2019-12-04 15:19:48 -06:00
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src	Add tests for the interface types output of wasm-bindgen (#1898)	2019-12-04 15:19:48 -06:00
Cargo.toml	Rewrite wasm-bindgen with updated interface types proposal (#1882)	2019-12-03 11:16:44 -06:00