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Auto merge of #84323 - richkadel:uncovered-functions, r=tmandry
coverage of async function bodies should match non-async This fixes some missing coverage within async function bodies. Commit 1 demonstrates the problem in the fixed issue, and commit 2 corrects it. Fixes: #83985
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commit
6af1e632a9
@ -11,7 +11,7 @@ use rustc_middle::mir::{
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use rustc_middle::ty::TyCtxt;
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use rustc_span::source_map::original_sp;
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use rustc_span::{BytePos, Span, SyntaxContext};
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use rustc_span::{BytePos, Span};
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use std::cmp::Ordering;
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@ -246,7 +246,7 @@ impl<'a, 'tcx> CoverageSpans<'a, 'tcx> {
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) -> Vec<CoverageSpan> {
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let mut coverage_spans = CoverageSpans {
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mir_body,
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fn_sig_span,
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fn_sig_span: fn_sig_source_span(fn_sig_span, body_span),
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body_span,
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basic_coverage_blocks,
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sorted_spans_iter: None,
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@ -731,8 +731,13 @@ pub(super) fn filtered_terminator_span(
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}
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}
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#[inline]
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fn fn_sig_source_span(fn_sig_span: Span, body_span: Span) -> Span {
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original_sp(fn_sig_span, body_span).with_ctxt(body_span.ctxt())
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}
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#[inline]
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fn function_source_span(span: Span, body_span: Span) -> Span {
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let span = original_sp(span, body_span).with_ctxt(SyntaxContext::root());
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let span = original_sp(span, body_span).with_ctxt(body_span.ctxt());
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if body_span.contains(span) { span } else { body_span }
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}
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@ -1,6 +1,6 @@
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1| |#![allow(unused_assignments, dead_code)]
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2| |
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3| |// compile-flags: --edition=2018 -C opt-level=1 # fix in rustc_mir/monomorphize/partitioning/mod.rs
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3| |// compile-flags: --edition=2018 -C opt-level=1
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4| |
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5| 1|async fn c(x: u8) -> u8 {
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6| 1| if x == 8 {
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@ -0,0 +1,115 @@
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1| |// compile-flags: --edition=2018
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2| |
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3| |use core::{
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4| | future::Future,
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5| | marker::Send,
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6| | pin::Pin,
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7| |};
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8| |
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9| 1|fn non_async_func() {
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10| 1| println!("non_async_func was covered");
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11| 1| let b = true;
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12| 1| if b {
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13| 1| println!("non_async_func println in block");
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14| 1| }
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15| 1|}
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16| |
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17| |// FIXME(#83985): The auto-generated closure in an async function is failing to include
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18| |// the println!() and `let` assignment lines in the coverage code region(s), as it does in the
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19| |// non-async function above, unless the `println!()` is inside a covered block.
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20| 1|async fn async_func() {
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21| 1| println!("async_func was covered");
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22| 1| let b = true;
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23| 1| if b {
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24| 1| println!("async_func println in block");
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25| 1| }
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^0
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26| 1|}
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27| |
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28| |// FIXME(#83985): As above, this async function only has the `println!()` macro call, which is not
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29| |// showing coverage, so the entire async closure _appears_ uncovered; but this is not exactly true.
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30| |// It's only certain kinds of lines and/or their context that results in missing coverage.
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31| 1|async fn async_func_just_println() {
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32| 1| println!("async_func_just_println was covered");
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33| 1|}
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34| |
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35| 1|fn main() {
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36| 1| println!("codecovsample::main");
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37| 1|
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38| 1| non_async_func();
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39| 1|
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40| 1| executor::block_on(async_func());
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41| 1| executor::block_on(async_func_just_println());
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42| 1|}
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43| |
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44| |mod executor {
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45| | use core::{
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46| | future::Future,
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47| | pin::Pin,
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48| | task::{Context, Poll, RawWaker, RawWakerVTable, Waker},
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49| | };
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50| |
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51| 2| pub fn block_on<F: Future>(mut future: F) -> F::Output {
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52| 2| let mut future = unsafe { Pin::new_unchecked(&mut future) };
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53| 2| use std::hint::unreachable_unchecked;
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54| 2| static VTABLE: RawWakerVTable = RawWakerVTable::new(
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55| 2| |_| unsafe { unreachable_unchecked() }, // clone
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^0
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56| 2| |_| unsafe { unreachable_unchecked() }, // wake
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^0
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57| 2| |_| unsafe { unreachable_unchecked() }, // wake_by_ref
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^0
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58| 2| |_| (),
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59| 2| );
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60| 2| let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
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61| 2| let mut context = Context::from_waker(&waker);
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62| |
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63| | loop {
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64| 2| if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
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65| 2| break val;
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66| 0| }
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67| | }
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68| 2| }
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------------------
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| async2::executor::block_on::<core::future::from_generator::GenFuture<async2::async_func::{closure#0}>>:
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| 51| 1| pub fn block_on<F: Future>(mut future: F) -> F::Output {
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| 52| 1| let mut future = unsafe { Pin::new_unchecked(&mut future) };
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| 53| 1| use std::hint::unreachable_unchecked;
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| 54| 1| static VTABLE: RawWakerVTable = RawWakerVTable::new(
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| 55| 1| |_| unsafe { unreachable_unchecked() }, // clone
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| 56| 1| |_| unsafe { unreachable_unchecked() }, // wake
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| 57| 1| |_| unsafe { unreachable_unchecked() }, // wake_by_ref
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| 58| 1| |_| (),
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| 59| 1| );
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| 60| 1| let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
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| 61| 1| let mut context = Context::from_waker(&waker);
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| 62| |
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| 63| | loop {
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| 64| 1| if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
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| 65| 1| break val;
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| 66| 0| }
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| 67| | }
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| 68| 1| }
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------------------
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| async2::executor::block_on::<core::future::from_generator::GenFuture<async2::async_func_just_println::{closure#0}>>:
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| 51| 1| pub fn block_on<F: Future>(mut future: F) -> F::Output {
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| 52| 1| let mut future = unsafe { Pin::new_unchecked(&mut future) };
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| 53| 1| use std::hint::unreachable_unchecked;
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| 54| 1| static VTABLE: RawWakerVTable = RawWakerVTable::new(
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| 55| 1| |_| unsafe { unreachable_unchecked() }, // clone
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| 56| 1| |_| unsafe { unreachable_unchecked() }, // wake
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| 57| 1| |_| unsafe { unreachable_unchecked() }, // wake_by_ref
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| 58| 1| |_| (),
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| 59| 1| );
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| 60| 1| let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
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| 61| 1| let mut context = Context::from_waker(&waker);
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| 62| |
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| 63| | loop {
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| 64| 1| if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
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| 65| 1| break val;
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| 66| 0| }
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| 67| | }
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| 68| 1| }
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------------------
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69| |}
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@ -1,6 +1,6 @@
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#![allow(unused_assignments, dead_code)]
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// compile-flags: --edition=2018 -C opt-level=1 # fix in rustc_mir/monomorphize/partitioning/mod.rs
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// compile-flags: --edition=2018 -C opt-level=1
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async fn c(x: u8) -> u8 {
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if x == 8 {
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69
src/test/run-make-fulldeps/coverage/async2.rs
Normal file
69
src/test/run-make-fulldeps/coverage/async2.rs
Normal file
@ -0,0 +1,69 @@
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// compile-flags: --edition=2018
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use core::{
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future::Future,
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marker::Send,
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pin::Pin,
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};
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fn non_async_func() {
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println!("non_async_func was covered");
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let b = true;
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if b {
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println!("non_async_func println in block");
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}
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}
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// FIXME(#83985): The auto-generated closure in an async function is failing to include
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// the println!() and `let` assignment lines in the coverage code region(s), as it does in the
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// non-async function above, unless the `println!()` is inside a covered block.
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async fn async_func() {
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println!("async_func was covered");
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let b = true;
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if b {
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println!("async_func println in block");
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}
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}
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// FIXME(#83985): As above, this async function only has the `println!()` macro call, which is not
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// showing coverage, so the entire async closure _appears_ uncovered; but this is not exactly true.
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// It's only certain kinds of lines and/or their context that results in missing coverage.
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async fn async_func_just_println() {
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println!("async_func_just_println was covered");
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}
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fn main() {
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println!("codecovsample::main");
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non_async_func();
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executor::block_on(async_func());
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executor::block_on(async_func_just_println());
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}
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mod executor {
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use core::{
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future::Future,
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pin::Pin,
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task::{Context, Poll, RawWaker, RawWakerVTable, Waker},
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};
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pub fn block_on<F: Future>(mut future: F) -> F::Output {
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let mut future = unsafe { Pin::new_unchecked(&mut future) };
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use std::hint::unreachable_unchecked;
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static VTABLE: RawWakerVTable = RawWakerVTable::new(
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|_| unsafe { unreachable_unchecked() }, // clone
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|_| unsafe { unreachable_unchecked() }, // wake
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|_| unsafe { unreachable_unchecked() }, // wake_by_ref
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|_| (),
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);
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let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
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let mut context = Context::from_waker(&waker);
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loop {
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if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
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break val;
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}
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}
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}
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}
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