crux-mir: Support cross-compiling libs to wasm32 target

crux-mir/README.md

@@ -28,12 +28,21 @@ Use 8.10.7, 9.2.7, or 9.4.4.  From the `crux-mir` directory, run:
 
     $ cabal v2-install exe:crux-mir --overwrite-policy=always
 
-Then translate the Rust libraries in `lib/`:
+Then translate the Rust libraries in `lib/` (requires
+[`jq`](https://jqlang.github.io/jq/)):
 
     $ ./translate_libs.sh
 
+If you want to cross-compile for a different target, you can pass a [target
+triple](https://doc.rust-lang.org/nightly/rustc/platform-support.html) as an
+optional argument to `./translate_libs.sh`. This is experimental and we have
+only tested `wasm32-unknown-unknown` to work; you might get build errors for
+other targets.
+
+    $ ./translate_libs.sh wasm32-unknown-unknown
+
 When upgrading from a previous version, first install the new `mir-json`
-version, then rerun both commands.
+version, then rerun the `cabal v2-install` and `./translate_libs.sh` commands.
 
 
 ## Usage

crux-mir/lib/dlmalloc/.gitignore

@@ -0,0 +1,3 @@
+/target/
+**/*.rs.bk
+Cargo.lock

crux-mir/lib/dlmalloc/Cargo.toml

@@ -0,0 +1,43 @@
+[package]
+name = "dlmalloc"
+version = "0.2.3"
+authors = ["Alex Crichton <alex@alexcrichton.com>"]
+license = "MIT/Apache-2.0"
+readme = "README.md"
+repository = "https://github.com/alexcrichton/dlmalloc-rs"
+homepage = "https://github.com/alexcrichton/dlmalloc-rs"
+documentation = "https://docs.rs/dlmalloc"
+description = """
+A Rust port of the dlmalloc allocator
+"""
+
+[package.metadata.docs.rs]
+features = ['global']
+
+[lib]
+doctest = false
+
+[target.'cfg(all(unix, not(target_arch = "wasm32")))'.dependencies]
+libc = { version = "0.2", default-features = false }
+
+[dependencies]
+# For more information on these dependencies see rust-lang/rust's
+# `src/tools/rustc-std-workspace` folder
+core = { version = '1.0.0', optional = true, package = 'rustc-std-workspace-core' }
+compiler_builtins = { version = '0.1.0', optional = true }
+
+[dev-dependencies]
+rand = "0.3"
+
+[profile.release]
+debug-assertions = true
+
+[features]
+# Enable implementations of the `GlobalAlloc` standard library API, exporting a
+# new `GlobalDlmalloc` as well which implements this trait.
+global = []
+
+# Enable very expensive debug checks in this crate
+debug = []
+
+rustc-dep-of-std = ['core', 'compiler_builtins/rustc-dep-of-std']

crux-mir/lib/dlmalloc/LICENSE-APACHE

@@ -0,0 +1,201 @@
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crux-mir/lib/dlmalloc/LICENSE-MIT

@@ -0,0 +1,25 @@
+Copyright (c) 2014 Alex Crichton
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
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+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

crux-mir/lib/dlmalloc/README.md

@@ -0,0 +1,40 @@
+# dlmalloc-rs
+
+A port of [dlmalloc] to Rust.
+
+[Documentation](https://docs.rs/dlmalloc)
+
+[dlmalloc]: http://gee.cs.oswego.edu/dl/html/malloc.html
+
+## Why dlmalloc?
+
+This crate is a port of [dlmalloc] to Rust, and doesn't rely on C. The primary
+purpose of this crate is to serve as the default allocator for Rust on the
+`wasm32-unknown-unknown` target. At the time this was written the wasm target
+didn't support C code, so it was required to have a Rust-only solution.
+
+This allocator is not the most performant by a longshot. It is primarily, I
+think, intended for being easy to port and easy to learn. I didn't dive too deep
+into the implementation when writing it, it's just a straight port of the C
+version.
+
+It's unlikely that Rust code needs to worry/interact with this allocator in
+general. Most of the time you'll be manually switching to a different allocator
+:)
+
+# License
+
+This project is licensed under either of
+
+ * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+   http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+   http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in this project by you, as defined in the Apache-2.0 license,
+shall be dual licensed as above, without any additional terms or conditions.

crux-mir/lib/dlmalloc/build.rs

@@ -0,0 +1,4 @@
+fn main() {
+    #[cfg(feature = "debug")]
+    println!("cargo:rustc-cfg=debug_assertions");
+}