47 lines
1.7 KiB
Rust
47 lines
1.7 KiB
Rust
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//! Smoke test to check that that symbols of `extern "C"` functions and `#[no_mangle]` rust
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//! functions:
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//!
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//! 1. Are externally visible in the dylib produced.
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//! 2. That the symbol visibility is orthogonal to the Rust nameres visibility of the functions
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//! involved.
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//@ ignore-cross-compile
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use std::collections::BTreeSet;
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use run_make_support::object::{self, Object};
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use run_make_support::{dynamic_lib_name, is_darwin, path, rfs, rustc};
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fn main() {
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let dylib = dynamic_lib_name("dylib");
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rustc().input("dylib.rs").output(&dylib).arg("-Cprefer-dynamic").run();
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let expected_symbols = if is_darwin() {
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// Mach-O states that all exported symbols should have an underscore as prefix. At the
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// same time dlsym will implicitly add it, so outside of compilers, linkers and people
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// writing assembly, nobody needs to be aware of this.
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BTreeSet::from(["_fun1", "_fun2", "_fun3", "_fun4", "_fun5", "_fun6"])
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} else {
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BTreeSet::from(["fun1", "fun2", "fun3", "fun4", "fun5", "fun6"])
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};
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let mut found_symbols = BTreeSet::new();
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let blob = rfs::read(path(dylib));
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let file = object::File::parse(&*blob).unwrap();
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for export in file.exports().unwrap() {
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let sym_name = export.name();
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let sym_name = std::str::from_utf8(sym_name).unwrap();
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found_symbols.insert(sym_name);
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}
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println!("expected_symbols = {:?}", expected_symbols);
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println!("found_symbols = {:?}", found_symbols);
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if !found_symbols.is_superset(&expected_symbols) {
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for diff in expected_symbols.difference(&found_symbols) {
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eprintln!("missing symbol: {}", diff);
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}
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panic!("missing expected symbols");
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}
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}
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