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Diffstat (limited to 'tests/run-make/coverage/async.rs')
-rw-r--r-- | tests/run-make/coverage/async.rs | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/tests/run-make/coverage/async.rs b/tests/run-make/coverage/async.rs deleted file mode 100644 index efd9e62d6..000000000 --- a/tests/run-make/coverage/async.rs +++ /dev/null @@ -1,128 +0,0 @@ -#![allow(unused_assignments, dead_code)] - -// compile-flags: --edition=2018 -C opt-level=1 - -async fn c(x: u8) -> u8 { - if x == 8 { - 1 - } else { - 0 - } -} - -async fn d() -> u8 { 1 } - -async fn e() -> u8 { 1 } // unused function; executor does not block on `g()` - -async fn f() -> u8 { 1 } - -async fn foo() -> [bool; 10] { [false; 10] } // unused function; executor does not block on `h()` - -pub async fn g(x: u8) { - match x { - y if e().await == y => (), - y if f().await == y => (), - _ => (), - } -} - -async fn h(x: usize) { // The function signature is counted when called, but the body is not - // executed (not awaited) so the open brace has a `0` count (at least when - // displayed with `llvm-cov show` in color-mode). - match x { - y if foo().await[y] => (), - _ => (), - } -} - -async fn i(x: u8) { // line coverage is 1, but there are 2 regions: - // (a) the function signature, counted when the function is called; and - // (b) the open brace for the function body, counted once when the body is - // executed asynchronously. - match x { - y if c(x).await == y + 1 => { d().await; } - y if f().await == y + 1 => (), - _ => (), - } -} - -fn j(x: u8) { - // non-async versions of `c()`, `d()`, and `f()` to make it similar to async `i()`. - fn c(x: u8) -> u8 { - if x == 8 { - 1 // This line appears covered, but the 1-character expression span covering the `1` - // is not executed. (`llvm-cov show` displays a `^0` below the `1` ). This is because - // `fn j()` executes the open brace for the function body, followed by the function's - // first executable statement, `match x`. Inner function declarations are not - // "visible" to the MIR for `j()`, so the code region counts all lines between the - // open brace and the first statement as executed, which is, in a sense, true. - // `llvm-cov show` overcomes this kind of situation by showing the actual counts - // of the enclosed coverages, (that is, the `1` expression was not executed, and - // accurately displays a `0`). - } else { - 0 - } - } - fn d() -> u8 { 1 } // inner function is defined in-line, but the function is not executed - fn f() -> u8 { 1 } - match x { - y if c(x) == y + 1 => { d(); } - y if f() == y + 1 => (), - _ => (), - } -} - -fn k(x: u8) { // unused function - match x { - 1 => (), - 2 => (), - _ => (), - } -} - -fn l(x: u8) { - match x { - 1 => (), - 2 => (), - _ => (), - } -} - -async fn m(x: u8) -> u8 { x - 1 } - -fn main() { - let _ = g(10); - let _ = h(9); - let mut future = Box::pin(i(8)); - j(7); - l(6); - let _ = m(5); - executor::block_on(future.as_mut()); -} - -mod executor { - use core::{ - future::Future, - pin::Pin, - task::{Context, Poll, RawWaker, RawWakerVTable, Waker}, - }; - - pub fn block_on<F: Future>(mut future: F) -> F::Output { - let mut future = unsafe { Pin::new_unchecked(&mut future) }; - use std::hint::unreachable_unchecked; - static VTABLE: RawWakerVTable = RawWakerVTable::new( - |_| unsafe { unreachable_unchecked() }, // clone - |_| unsafe { unreachable_unchecked() }, // wake - |_| unsafe { unreachable_unchecked() }, // wake_by_ref - |_| (), - ); - let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) }; - let mut context = Context::from_waker(&waker); - - loop { - if let Poll::Ready(val) = future.as_mut().poll(&mut context) { - break val; - } - } - } -} |