SemverQuery(
id: "exported_function_abi_no_longer_unwind",
human_readable_name: "exported function ABI is no longer unwind-capable",
description: "An exported function switched from an unwind-capable ABI to a non-unwind version of the same ABI.",
required_update: Major,
lint_level: Deny,
reference_link: Some("https://rust-lang.github.io/rfcs/2945-c-unwind-abi.html"),
query: r#"
{
CrateDiff {
current {
ffi_exported_function {
name @output
export_name @output @tag
abi {
abi_name: name @tag
abi_new_raw_name: raw_name @output
unwind @filter(op: "!=", value: ["$true"])
}
span_: span @optional {
filename @output
begin_line @output
end_line @output
}
}
}
baseline {
ffi_exported_function {
export_name @filter(op: "=", value: ["%export_name"])
abi {
name @filter(op: "=", value: ["%abi_name"])
abi_old_raw_name: raw_name @output
unwind @filter(op: "=", value: ["$true"])
}
}
}
}
}"#,
arguments: {
"true": true,
},
error_message: "An exported function switched from an unwind-capable ABI to the non-unwind variant, making unwinding from that symbol undefined.",
per_result_error_template: Some("{{name}} (export_name {{export_name}}) changed ABI from {{abi_old_raw_name}} to {{abi_new_raw_name}} in {{span_filename}}:{{span_begin_line}}"),
witness: None,
)