os-rust/src/test/ui/asm/named-asm-labels.rs

// only-x86_64

#![feature(asm, global_asm)]

#[no_mangle]
pub static FOO: usize = 42;

fn main() {
    unsafe {
        // Basic usage
        asm!("bar: nop"); //~ ERROR avoid using named labels

        // No following asm
        asm!("abcd:"); //~ ERROR avoid using named labels

        // Multiple labels on one line
        asm!("foo: bar1: nop");
        //~^ ERROR avoid using named labels
        //~| ERROR avoid using named labels

        // Multiple lines
        asm!("foo1: nop", "nop"); //~ ERROR avoid using named labels
        asm!("foo2: foo3: nop", "nop");
        //~^ ERROR avoid using named labels
        //~| ERROR avoid using named labels
        asm!("nop", "foo4: nop"); //~ ERROR avoid using named labels
        asm!("foo5: nop", "foo6: nop");
        //~^ ERROR avoid using named labels
        //~| ERROR avoid using named labels

        // Statement separator
        asm!("foo7: nop; foo8: nop");
        //~^ ERROR avoid using named labels
        //~| ERROR avoid using named labels
        asm!("foo9: nop; nop"); //~ ERROR avoid using named labels
        asm!("nop; foo10: nop"); //~ ERROR avoid using named labels

        // Escaped newline
        asm!("bar2: nop\n bar3: nop");
        //~^ ERROR avoid using named labels
        //~| ERROR avoid using named labels
        asm!("bar4: nop\n nop"); //~ ERROR avoid using named labels
        asm!("nop\n bar5: nop"); //~ ERROR avoid using named labels
        asm!("nop\n bar6: bar7: nop");
        //~^ ERROR avoid using named labels
        //~| ERROR avoid using named labels

        // Raw strings
        asm!(
            r"
            blah2: nop
            blah3: nop
            "
        );
        //~^^^^ ERROR avoid using named labels
        //~^^^^ ERROR avoid using named labels
        asm!(
            r###"
            nop
            nop ; blah4: nop
            "###
        );
        //~^^^ ERROR avoid using named labels

        // Non-labels
        // should not trigger lint, but may be invalid asm
        asm!("ab cd: nop");

        // `blah:` does not trigger because labels need to be at the start
        // of the statement, and there was already a non-label
        asm!("1bar: blah: nop");

        // Only `blah1:` should trigger
        asm!("blah1: 2bar: nop"); //~ ERROR avoid using named labels

        // Duplicate labels
        asm!("def: def: nop"); //~ ERROR avoid using named labels
        asm!("def: nop\ndef: nop"); //~ ERROR avoid using named labels
        asm!("def: nop; def: nop"); //~ ERROR avoid using named labels

        // Trying to break parsing
        asm!(":");
        asm!("\n:\n");
        asm!("::::");

        // 0x3A is a ':'
        asm!("fooo\u{003A} nop"); //~ ERROR avoid using named labels
        asm!("foooo\x3A nop"); //~ ERROR avoid using named labels

        // 0x0A is a newline
        asm!("fooooo:\u{000A} nop"); //~ ERROR avoid using named labels
        asm!("foooooo:\x0A nop"); //~ ERROR avoid using named labels

        // Intentionally breaking span finding
        // equivalent to "ABC: nop"
        asm!("\x41\x42\x43\x3A\x20\x6E\x6F\x70"); //~ ERROR avoid using named labels

        // Non-label colons - should pass
        // (most of these are stolen from other places)
        asm!("{:l}", in(reg) 0i64);
        asm!("{:e}", in(reg) 0f32);
        asm!("mov rax, qword ptr fs:[0]");

        // Comments
        asm!(
            r"
            ab: nop // ab: does foo
            // cd: nop
            "
        );
        //~^^^^ ERROR avoid using named labels

        // Tests usage of colons in non-label positions
        asm!(":lo12:FOO"); // this is apparently valid aarch64
        // is there an example that is valid x86 for this test?
        asm!(":bbb nop");

        // Test include_str in asm
        asm!(include_str!("named-asm-labels.s")); //~ ERROR avoid using named labels

        // Test allowing or warning on the lint instead
        #[allow(named_asm_labels)]
        {
            asm!("allowed: nop"); // Should not emit anything
        }

        #[warn(named_asm_labels)]
        {
            asm!("warned: nop"); //~ WARNING avoid using named labels
        }
    }
}

// Don't trigger on global asm
global_asm!("aaaaaaaa: nop");