//@ only-wasm32-wasip1 use run_make_support::{rustc, tmp_dir, wasmparser}; use std::collections::HashMap; fn main() { rustc().input("foo.rs").target("wasm32-wasip1").run(); rustc().input("bar.rs").target("wasm32-wasip1").arg("-Clto").opt().run(); let file = std::fs::read(&tmp_dir().join("bar.wasm")).unwrap(); let mut custom = HashMap::new(); for payload in wasmparser::Parser::new(0).parse_all(&file) { let payload = payload.unwrap(); if let wasmparser::Payload::CustomSection(s) = payload { let prev = custom.insert(s.name(), s.data()); assert!(prev.is_none()); } } assert_eq!(custom.remove("foo"), Some(&[5, 6, 1, 2][..])); assert_eq!(custom.remove("bar"), Some(&[3, 4][..])); assert_eq!(custom.remove("baz"), Some(&[7, 8][..])); }