mirror of https://github.com/rust-lang/rust
41 lines
1.7 KiB
Rust
41 lines
1.7 KiB
Rust
// ignore-tidy-tab
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// Staticlibs don't include Rust object files from upstream crates if the same
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// code was already pulled into the lib via LTO. However, the bug described in
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// https://github.com/rust-lang/rust/issues/64153 lead to this exclusion not
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// working properly if the upstream crate was compiled with an explicit filename
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// (via `-o`).
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// This test makes sure that functions defined in the upstream crates do not
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// appear twice in the final staticlib when listing all the symbols from it.
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//@ ignore-windows
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// Reason: `llvm-objdump`'s output looks different on windows than on other platforms.
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// Only checking on Unix platforms should suffice.
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//FIXME(Oneirical): This could be adapted to work on Windows by checking how
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// that output differs.
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use run_make_support::{llvm_objdump, regex, rust_lib_name, rustc, static_lib_name};
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fn main() {
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rustc()
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.crate_type("rlib")
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.input("upstream.rs")
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.output(rust_lib_name("upstream"))
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.codegen_units(1)
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.run();
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rustc()
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.crate_type("staticlib")
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.input("downstream.rs")
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.arg("-Clto")
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.output(static_lib_name("downstream"))
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.codegen_units(1)
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.run();
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let syms = llvm_objdump().arg("-t").input(static_lib_name("downstream")).run().stdout_utf8();
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let re = regex::Regex::new(r#"\s*g\s*F\s.*issue64153_test_function"#).unwrap();
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// Count the global instances of `issue64153_test_function`. There'll be 2
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// if the `upstream` object file got erroneously included twice.
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// The line we are testing for with the regex looks something like:
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// 0000000000000000 g F .text.issue64153_test_function 00000023 issue64153_test_function
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assert_eq!(re.find_iter(syms.as_str()).count(), 1);
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}
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