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-rw-r--r--tests/run-coverage/abort.coverage69
-rw-r--r--tests/run-coverage/abort.rs66
-rw-r--r--tests/run-coverage/assert.coverage34
-rw-r--r--tests/run-coverage/assert.rs32
-rw-r--r--tests/run-coverage/async.coverage139
-rw-r--r--tests/run-coverage/async.rs128
-rw-r--r--tests/run-coverage/async2.coverage116
-rw-r--r--tests/run-coverage/async2.rs69
-rw-r--r--tests/run-coverage/auxiliary/inline_always_with_dead_code.rs22
-rw-r--r--tests/run-coverage/auxiliary/unused_mod_helper.rs3
-rw-r--r--tests/run-coverage/auxiliary/used_crate.rs100
-rw-r--r--tests/run-coverage/auxiliary/used_inline_crate.rs90
-rw-r--r--tests/run-coverage/closure.coverage222
-rw-r--r--tests/run-coverage/closure.rs215
-rw-r--r--tests/run-coverage/closure_macro.coverage42
-rw-r--r--tests/run-coverage/closure_macro.rs40
-rw-r--r--tests/run-coverage/closure_macro_async.coverage83
-rw-r--r--tests/run-coverage/closure_macro_async.rs81
-rw-r--r--tests/run-coverage/conditions.coverage94
-rw-r--r--tests/run-coverage/conditions.rs87
-rw-r--r--tests/run-coverage/continue.coverage70
-rw-r--r--tests/run-coverage/continue.rs69
-rw-r--r--tests/run-coverage/dead_code.coverage39
-rw-r--r--tests/run-coverage/dead_code.rs37
-rw-r--r--tests/run-coverage/drop_trait.coverage34
-rw-r--r--tests/run-coverage/drop_trait.rs33
-rw-r--r--tests/run-coverage/generator.coverage32
-rw-r--r--tests/run-coverage/generator.rs30
-rw-r--r--tests/run-coverage/generics.coverage71
-rw-r--r--tests/run-coverage/generics.rs48
-rw-r--r--tests/run-coverage/if.coverage30
-rw-r--r--tests/run-coverage/if.rs28
-rw-r--r--tests/run-coverage/if_else.coverage41
-rw-r--r--tests/run-coverage/if_else.rs40
-rw-r--r--tests/run-coverage/inline-dead.coverage28
-rw-r--r--tests/run-coverage/inline-dead.rs27
-rw-r--r--tests/run-coverage/inline.coverage54
-rw-r--r--tests/run-coverage/inline.rs51
-rw-r--r--tests/run-coverage/inner_items.coverage60
-rw-r--r--tests/run-coverage/inner_items.rs57
-rw-r--r--tests/run-coverage/issue-83601.coverage16
-rw-r--r--tests/run-coverage/issue-83601.rs14
-rw-r--r--tests/run-coverage/issue-84561.coverage189
-rw-r--r--tests/run-coverage/issue-84561.rs182
-rw-r--r--tests/run-coverage/issue-85461.coverage36
-rw-r--r--tests/run-coverage/issue-85461.rs10
-rw-r--r--tests/run-coverage/issue-93054.coverage29
-rw-r--r--tests/run-coverage/issue-93054.rs28
-rw-r--r--tests/run-coverage/lazy_boolean.coverage64
-rw-r--r--tests/run-coverage/lazy_boolean.rs61
-rw-r--r--tests/run-coverage/loop_break_value.coverage14
-rw-r--r--tests/run-coverage/loop_break_value.rs13
-rw-r--r--tests/run-coverage/loops_branches.coverage68
-rw-r--r--tests/run-coverage/loops_branches.rs61
-rw-r--r--tests/run-coverage/match_or_pattern.coverage50
-rw-r--r--tests/run-coverage/match_or_pattern.rs45
-rw-r--r--tests/run-coverage/nested_loops.coverage26
-rw-r--r--tests/run-coverage/nested_loops.rs25
-rw-r--r--tests/run-coverage/no_cov_crate.coverage87
-rw-r--r--tests/run-coverage/no_cov_crate.rs86
-rw-r--r--tests/run-coverage/overflow.coverage64
-rw-r--r--tests/run-coverage/overflow.rs63
-rw-r--r--tests/run-coverage/panic_unwind.coverage32
-rw-r--r--tests/run-coverage/panic_unwind.rs31
-rw-r--r--tests/run-coverage/partial_eq.coverage48
-rw-r--r--tests/run-coverage/partial_eq.rs46
-rw-r--r--tests/run-coverage/simple_loop.coverage37
-rw-r--r--tests/run-coverage/simple_loop.rs35
-rw-r--r--tests/run-coverage/simple_match.coverage45
-rw-r--r--tests/run-coverage/simple_match.rs43
-rw-r--r--tests/run-coverage/sort_groups.coverage49
-rw-r--r--tests/run-coverage/sort_groups.rs23
-rw-r--r--tests/run-coverage/test_harness.coverage11
-rw-r--r--tests/run-coverage/test_harness.rs10
-rw-r--r--tests/run-coverage/tight_inf_loop.coverage6
-rw-r--r--tests/run-coverage/tight_inf_loop.rs5
-rw-r--r--tests/run-coverage/try_error_result.coverage125
-rw-r--r--tests/run-coverage/try_error_result.rs118
-rw-r--r--tests/run-coverage/unused.coverage62
-rw-r--r--tests/run-coverage/unused.rs39
-rw-r--r--tests/run-coverage/unused_mod.coverage13
-rw-r--r--tests/run-coverage/unused_mod.rs6
-rw-r--r--tests/run-coverage/uses_crate.coverage170
-rw-r--r--tests/run-coverage/uses_crate.rs19
-rw-r--r--tests/run-coverage/uses_inline_crate.coverage164
-rw-r--r--tests/run-coverage/uses_inline_crate.rs22
-rw-r--r--tests/run-coverage/while.coverage6
-rw-r--r--tests/run-coverage/while.rs5
-rw-r--r--tests/run-coverage/while_early_ret.coverage43
-rw-r--r--tests/run-coverage/while_early_ret.rs42
-rw-r--r--tests/run-coverage/yield.coverage38
-rw-r--r--tests/run-coverage/yield.rs37
92 files changed, 5172 insertions, 0 deletions
diff --git a/tests/run-coverage/abort.coverage b/tests/run-coverage/abort.coverage
new file mode 100644
index 000000000..a71c58d61
--- /dev/null
+++ b/tests/run-coverage/abort.coverage
@@ -0,0 +1,69 @@
+ 1| |#![feature(c_unwind)]
+ 2| |#![allow(unused_assignments)]
+ 3| |
+ 4| 12|extern "C" fn might_abort(should_abort: bool) {
+ 5| 12| if should_abort {
+ 6| 0| println!("aborting...");
+ 7| 0| panic!("panics and aborts");
+ 8| 12| } else {
+ 9| 12| println!("Don't Panic");
+ 10| 12| }
+ 11| 12|}
+ 12| |
+ 13| 1|fn main() -> Result<(), u8> {
+ 14| 1| let mut countdown = 10;
+ 15| 11| while countdown > 0 {
+ 16| 10| if countdown < 5 {
+ 17| 4| might_abort(false);
+ 18| 6| }
+ 19| | // See discussion (below the `Notes` section) on coverage results for the closing brace.
+ 20| 10| if countdown < 5 { might_abort(false); } // Counts for different regions on one line.
+ ^4 ^6
+ 21| | // For the following example, the closing brace is the last character on the line.
+ 22| | // This shows the character after the closing brace is highlighted, even if that next
+ 23| | // character is a newline.
+ 24| 10| if countdown < 5 { might_abort(false); }
+ ^4 ^6
+ 25| 10| countdown -= 1;
+ 26| | }
+ 27| 1| Ok(())
+ 28| 1|}
+ 29| |
+ 30| |// Notes:
+ 31| |// 1. Compare this program and its coverage results to those of the similar tests
+ 32| |// `panic_unwind.rs` and `try_error_result.rs`.
+ 33| |// 2. This test confirms the coverage generated when a program includes `UnwindAction::Terminate`.
+ 34| |// 3. The test does not invoke the abort. By executing to a successful completion, the coverage
+ 35| |// results show where the program did and did not execute.
+ 36| |// 4. If the program actually aborted, the coverage counters would not be saved (which "works as
+ 37| |// intended"). Coverage results would show no executed coverage regions.
+ 38| |// 6. If `should_abort` is `true` and the program aborts, the program exits with a `132` status
+ 39| |// (on Linux at least).
+ 40| |
+ 41| |/*
+ 42| |
+ 43| |Expect the following coverage results:
+ 44| |
+ 45| |```text
+ 46| | 16| 11| while countdown > 0 {
+ 47| | 17| 10| if countdown < 5 {
+ 48| | 18| 4| might_abort(false);
+ 49| | 19| 6| }
+ 50| |```
+ 51| |
+ 52| |This is actually correct.
+ 53| |
+ 54| |The condition `countdown < 5` executed 10 times (10 loop iterations).
+ 55| |
+ 56| |It evaluated to `true` 4 times, and executed the `might_abort()` call.
+ 57| |
+ 58| |It skipped the body of the `might_abort()` call 6 times. If an `if` does not include an explicit
+ 59| |`else`, the coverage implementation injects a counter, at the character immediately after the `if`s
+ 60| |closing brace, to count the "implicit" `else`. This is the only way to capture the coverage of the
+ 61| |non-true condition.
+ 62| |
+ 63| |As another example of why this is important, say the condition was `countdown < 50`, which is always
+ 64| |`true`. In that case, we wouldn't have a test for what happens if `might_abort()` is not called.
+ 65| |The closing brace would have a count of `0`, highlighting the missed coverage.
+ 66| |*/
+
diff --git a/tests/run-coverage/abort.rs b/tests/run-coverage/abort.rs
new file mode 100644
index 000000000..98264bdc1
--- /dev/null
+++ b/tests/run-coverage/abort.rs
@@ -0,0 +1,66 @@
+#![feature(c_unwind)]
+#![allow(unused_assignments)]
+
+extern "C" fn might_abort(should_abort: bool) {
+ if should_abort {
+ println!("aborting...");
+ panic!("panics and aborts");
+ } else {
+ println!("Don't Panic");
+ }
+}
+
+fn main() -> Result<(), u8> {
+ let mut countdown = 10;
+ while countdown > 0 {
+ if countdown < 5 {
+ might_abort(false);
+ }
+ // See discussion (below the `Notes` section) on coverage results for the closing brace.
+ if countdown < 5 { might_abort(false); } // Counts for different regions on one line.
+ // For the following example, the closing brace is the last character on the line.
+ // This shows the character after the closing brace is highlighted, even if that next
+ // character is a newline.
+ if countdown < 5 { might_abort(false); }
+ countdown -= 1;
+ }
+ Ok(())
+}
+
+// Notes:
+// 1. Compare this program and its coverage results to those of the similar tests
+// `panic_unwind.rs` and `try_error_result.rs`.
+// 2. This test confirms the coverage generated when a program includes `UnwindAction::Terminate`.
+// 3. The test does not invoke the abort. By executing to a successful completion, the coverage
+// results show where the program did and did not execute.
+// 4. If the program actually aborted, the coverage counters would not be saved (which "works as
+// intended"). Coverage results would show no executed coverage regions.
+// 6. If `should_abort` is `true` and the program aborts, the program exits with a `132` status
+// (on Linux at least).
+
+/*
+
+Expect the following coverage results:
+
+```text
+ 16| 11| while countdown > 0 {
+ 17| 10| if countdown < 5 {
+ 18| 4| might_abort(false);
+ 19| 6| }
+```
+
+This is actually correct.
+
+The condition `countdown < 5` executed 10 times (10 loop iterations).
+
+It evaluated to `true` 4 times, and executed the `might_abort()` call.
+
+It skipped the body of the `might_abort()` call 6 times. If an `if` does not include an explicit
+`else`, the coverage implementation injects a counter, at the character immediately after the `if`s
+closing brace, to count the "implicit" `else`. This is the only way to capture the coverage of the
+non-true condition.
+
+As another example of why this is important, say the condition was `countdown < 50`, which is always
+`true`. In that case, we wouldn't have a test for what happens if `might_abort()` is not called.
+The closing brace would have a count of `0`, highlighting the missed coverage.
+*/
diff --git a/tests/run-coverage/assert.coverage b/tests/run-coverage/assert.coverage
new file mode 100644
index 000000000..a7134a149
--- /dev/null
+++ b/tests/run-coverage/assert.coverage
@@ -0,0 +1,34 @@
+ 1| |#![allow(unused_assignments)]
+ 2| |// failure-status: 101
+ 3| |
+ 4| 4|fn might_fail_assert(one_plus_one: u32) {
+ 5| 4| println!("does 1 + 1 = {}?", one_plus_one);
+ 6| 4| assert_eq!(1 + 1, one_plus_one, "the argument was wrong");
+ ^1
+ 7| 3|}
+ 8| |
+ 9| 1|fn main() -> Result<(),u8> {
+ 10| 1| let mut countdown = 10;
+ 11| 11| while countdown > 0 {
+ 12| 11| if countdown == 1 {
+ 13| 1| might_fail_assert(3);
+ 14| 10| } else if countdown < 5 {
+ 15| 3| might_fail_assert(2);
+ 16| 6| }
+ 17| 10| countdown -= 1;
+ 18| | }
+ 19| 0| Ok(())
+ 20| 0|}
+ 21| |
+ 22| |// Notes:
+ 23| |// 1. Compare this program and its coverage results to those of the very similar test
+ 24| |// `panic_unwind.rs`, and similar tests `abort.rs` and `try_error_result.rs`.
+ 25| |// 2. This test confirms the coverage generated when a program passes or fails an `assert!()` or
+ 26| |// related `assert_*!()` macro.
+ 27| |// 3. Notably, the `assert` macros *do not* generate `TerminatorKind::Assert`. The macros produce
+ 28| |// conditional expressions, `TerminatorKind::SwitchInt` branches, and a possible call to
+ 29| |// `begin_panic_fmt()` (that begins a panic unwind, if the assertion test fails).
+ 30| |// 4. `TerminatoKind::Assert` is, however, also present in the MIR generated for this test
+ 31| |// (and in many other coverage tests). The `Assert` terminator is typically generated by the
+ 32| |// Rust compiler to check for runtime failures, such as numeric overflows.
+
diff --git a/tests/run-coverage/assert.rs b/tests/run-coverage/assert.rs
new file mode 100644
index 000000000..d32a37e07
--- /dev/null
+++ b/tests/run-coverage/assert.rs
@@ -0,0 +1,32 @@
+#![allow(unused_assignments)]
+// failure-status: 101
+
+fn might_fail_assert(one_plus_one: u32) {
+ println!("does 1 + 1 = {}?", one_plus_one);
+ assert_eq!(1 + 1, one_plus_one, "the argument was wrong");
+}
+
+fn main() -> Result<(),u8> {
+ let mut countdown = 10;
+ while countdown > 0 {
+ if countdown == 1 {
+ might_fail_assert(3);
+ } else if countdown < 5 {
+ might_fail_assert(2);
+ }
+ countdown -= 1;
+ }
+ Ok(())
+}
+
+// Notes:
+// 1. Compare this program and its coverage results to those of the very similar test
+// `panic_unwind.rs`, and similar tests `abort.rs` and `try_error_result.rs`.
+// 2. This test confirms the coverage generated when a program passes or fails an `assert!()` or
+// related `assert_*!()` macro.
+// 3. Notably, the `assert` macros *do not* generate `TerminatorKind::Assert`. The macros produce
+// conditional expressions, `TerminatorKind::SwitchInt` branches, and a possible call to
+// `begin_panic_fmt()` (that begins a panic unwind, if the assertion test fails).
+// 4. `TerminatoKind::Assert` is, however, also present in the MIR generated for this test
+// (and in many other coverage tests). The `Assert` terminator is typically generated by the
+// Rust compiler to check for runtime failures, such as numeric overflows.
diff --git a/tests/run-coverage/async.coverage b/tests/run-coverage/async.coverage
new file mode 100644
index 000000000..93c1535b0
--- /dev/null
+++ b/tests/run-coverage/async.coverage
@@ -0,0 +1,139 @@
+ 1| |#![allow(unused_assignments, dead_code)]
+ 2| |
+ 3| |// compile-flags: --edition=2018 -C opt-level=1
+ 4| |
+ 5| 1|async fn c(x: u8) -> u8 {
+ 6| 1| if x == 8 {
+ 7| 1| 1
+ 8| | } else {
+ 9| 0| 0
+ 10| | }
+ 11| 1|}
+ 12| |
+ 13| 0|async fn d() -> u8 { 1 }
+ 14| |
+ 15| 0|async fn e() -> u8 { 1 } // unused function; executor does not block on `g()`
+ 16| |
+ 17| 1|async fn f() -> u8 { 1 }
+ 18| |
+ 19| 0|async fn foo() -> [bool; 10] { [false; 10] } // unused function; executor does not block on `h()`
+ 20| |
+ 21| 1|pub async fn g(x: u8) {
+ 22| 0| match x {
+ 23| 0| y if e().await == y => (),
+ 24| 0| y if f().await == y => (),
+ 25| 0| _ => (),
+ 26| | }
+ 27| 0|}
+ 28| |
+ 29| 1|async fn h(x: usize) { // The function signature is counted when called, but the body is not
+ 30| 0| // executed (not awaited) so the open brace has a `0` count (at least when
+ 31| 0| // displayed with `llvm-cov show` in color-mode).
+ 32| 0| match x {
+ 33| 0| y if foo().await[y] => (),
+ 34| 0| _ => (),
+ 35| | }
+ 36| 0|}
+ 37| |
+ 38| 1|async fn i(x: u8) { // line coverage is 1, but there are 2 regions:
+ 39| 1| // (a) the function signature, counted when the function is called; and
+ 40| 1| // (b) the open brace for the function body, counted once when the body is
+ 41| 1| // executed asynchronously.
+ 42| 1| match x {
+ 43| 1| y if c(x).await == y + 1 => { d().await; }
+ ^0 ^0 ^0 ^0
+ 44| 1| y if f().await == y + 1 => (),
+ ^0 ^0 ^0
+ 45| 1| _ => (),
+ 46| | }
+ 47| 1|}
+ 48| |
+ 49| 1|fn j(x: u8) {
+ 50| 1| // non-async versions of `c()`, `d()`, and `f()` to make it similar to async `i()`.
+ 51| 1| fn c(x: u8) -> u8 {
+ 52| 1| if x == 8 {
+ 53| 1| 1 // This line appears covered, but the 1-character expression span covering the `1`
+ ^0
+ 54| 1| // is not executed. (`llvm-cov show` displays a `^0` below the `1` ). This is because
+ 55| 1| // `fn j()` executes the open brace for the function body, followed by the function's
+ 56| 1| // first executable statement, `match x`. Inner function declarations are not
+ 57| 1| // "visible" to the MIR for `j()`, so the code region counts all lines between the
+ 58| 1| // open brace and the first statement as executed, which is, in a sense, true.
+ 59| 1| // `llvm-cov show` overcomes this kind of situation by showing the actual counts
+ 60| 1| // of the enclosed coverages, (that is, the `1` expression was not executed, and
+ 61| 1| // accurately displays a `0`).
+ 62| 1| } else {
+ 63| 1| 0
+ 64| 1| }
+ 65| 1| }
+ 66| 1| fn d() -> u8 { 1 } // inner function is defined in-line, but the function is not executed
+ ^0
+ 67| 1| fn f() -> u8 { 1 }
+ 68| 1| match x {
+ 69| 1| y if c(x) == y + 1 => { d(); }
+ ^0 ^0
+ 70| 1| y if f() == y + 1 => (),
+ ^0 ^0
+ 71| 1| _ => (),
+ 72| | }
+ 73| 1|}
+ 74| |
+ 75| 0|fn k(x: u8) { // unused function
+ 76| 0| match x {
+ 77| 0| 1 => (),
+ 78| 0| 2 => (),
+ 79| 0| _ => (),
+ 80| | }
+ 81| 0|}
+ 82| |
+ 83| 1|fn l(x: u8) {
+ 84| 1| match x {
+ 85| 0| 1 => (),
+ 86| 0| 2 => (),
+ 87| 1| _ => (),
+ 88| | }
+ 89| 1|}
+ 90| |
+ 91| 1|async fn m(x: u8) -> u8 { x - 1 }
+ ^0
+ 92| |
+ 93| 1|fn main() {
+ 94| 1| let _ = g(10);
+ 95| 1| let _ = h(9);
+ 96| 1| let mut future = Box::pin(i(8));
+ 97| 1| j(7);
+ 98| 1| l(6);
+ 99| 1| let _ = m(5);
+ 100| 1| executor::block_on(future.as_mut());
+ 101| 1|}
+ 102| |
+ 103| |mod executor {
+ 104| | use core::{
+ 105| | future::Future,
+ 106| | pin::Pin,
+ 107| | task::{Context, Poll, RawWaker, RawWakerVTable, Waker},
+ 108| | };
+ 109| |
+ 110| 1| pub fn block_on<F: Future>(mut future: F) -> F::Output {
+ 111| 1| let mut future = unsafe { Pin::new_unchecked(&mut future) };
+ 112| 1| use std::hint::unreachable_unchecked;
+ 113| 1| static VTABLE: RawWakerVTable = RawWakerVTable::new(
+ 114| 1| |_| unsafe { unreachable_unchecked() }, // clone
+ ^0
+ 115| 1| |_| unsafe { unreachable_unchecked() }, // wake
+ ^0
+ 116| 1| |_| unsafe { unreachable_unchecked() }, // wake_by_ref
+ ^0
+ 117| 1| |_| (),
+ 118| 1| );
+ 119| 1| let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
+ 120| 1| let mut context = Context::from_waker(&waker);
+ 121| |
+ 122| | loop {
+ 123| 1| if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
+ 124| 1| break val;
+ 125| 0| }
+ 126| | }
+ 127| 1| }
+ 128| |}
+
diff --git a/tests/run-coverage/async.rs b/tests/run-coverage/async.rs
new file mode 100644
index 000000000..efd9e62d6
--- /dev/null
+++ b/tests/run-coverage/async.rs
@@ -0,0 +1,128 @@
+#![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;
+ }
+ }
+ }
+}
diff --git a/tests/run-coverage/async2.coverage b/tests/run-coverage/async2.coverage
new file mode 100644
index 000000000..500dde1f2
--- /dev/null
+++ b/tests/run-coverage/async2.coverage
@@ -0,0 +1,116 @@
+ 1| |// compile-flags: --edition=2018
+ 2| |
+ 3| |use core::{
+ 4| | future::Future,
+ 5| | marker::Send,
+ 6| | pin::Pin,
+ 7| |};
+ 8| |
+ 9| 1|fn non_async_func() {
+ 10| 1| println!("non_async_func was covered");
+ 11| 1| let b = true;
+ 12| 1| if b {
+ 13| 1| println!("non_async_func println in block");
+ 14| 1| }
+ ^0
+ 15| 1|}
+ 16| |
+ 17| |
+ 18| |
+ 19| |
+ 20| 1|async fn async_func() {
+ 21| 1| println!("async_func was covered");
+ 22| 1| let b = true;
+ 23| 1| if b {
+ 24| 1| println!("async_func println in block");
+ 25| 1| }
+ ^0
+ 26| 1|}
+ 27| |
+ 28| |
+ 29| |
+ 30| |
+ 31| 1|async fn async_func_just_println() {
+ 32| 1| println!("async_func_just_println was covered");
+ 33| 1|}
+ 34| |
+ 35| 1|fn main() {
+ 36| 1| println!("codecovsample::main");
+ 37| 1|
+ 38| 1| non_async_func();
+ 39| 1|
+ 40| 1| executor::block_on(async_func());
+ 41| 1| executor::block_on(async_func_just_println());
+ 42| 1|}
+ 43| |
+ 44| |mod executor {
+ 45| | use core::{
+ 46| | future::Future,
+ 47| | pin::Pin,
+ 48| | task::{Context, Poll, RawWaker, RawWakerVTable, Waker},
+ 49| | };
+ 50| |
+ 51| 2| pub fn block_on<F: Future>(mut future: F) -> F::Output {
+ 52| 2| let mut future = unsafe { Pin::new_unchecked(&mut future) };
+ 53| 2| use std::hint::unreachable_unchecked;
+ 54| 2| static VTABLE: RawWakerVTable = RawWakerVTable::new(
+ 55| 2| |_| unsafe { unreachable_unchecked() }, // clone
+ ^0
+ 56| 2| |_| unsafe { unreachable_unchecked() }, // wake
+ ^0
+ 57| 2| |_| unsafe { unreachable_unchecked() }, // wake_by_ref
+ ^0
+ 58| 2| |_| (),
+ 59| 2| );
+ 60| 2| let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
+ 61| 2| let mut context = Context::from_waker(&waker);
+ 62| |
+ 63| | loop {
+ 64| 2| if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
+ 65| 2| break val;
+ 66| 0| }
+ 67| | }
+ 68| 2| }
+ ------------------
+ | async2::executor::block_on::<async2::async_func::{closure#0}>:
+ | 51| 1| pub fn block_on<F: Future>(mut future: F) -> F::Output {
+ | 52| 1| let mut future = unsafe { Pin::new_unchecked(&mut future) };
+ | 53| 1| use std::hint::unreachable_unchecked;
+ | 54| 1| static VTABLE: RawWakerVTable = RawWakerVTable::new(
+ | 55| 1| |_| unsafe { unreachable_unchecked() }, // clone
+ | 56| 1| |_| unsafe { unreachable_unchecked() }, // wake
+ | 57| 1| |_| unsafe { unreachable_unchecked() }, // wake_by_ref
+ | 58| 1| |_| (),
+ | 59| 1| );
+ | 60| 1| let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
+ | 61| 1| let mut context = Context::from_waker(&waker);
+ | 62| |
+ | 63| | loop {
+ | 64| 1| if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
+ | 65| 1| break val;
+ | 66| 0| }
+ | 67| | }
+ | 68| 1| }
+ ------------------
+ | async2::executor::block_on::<async2::async_func_just_println::{closure#0}>:
+ | 51| 1| pub fn block_on<F: Future>(mut future: F) -> F::Output {
+ | 52| 1| let mut future = unsafe { Pin::new_unchecked(&mut future) };
+ | 53| 1| use std::hint::unreachable_unchecked;
+ | 54| 1| static VTABLE: RawWakerVTable = RawWakerVTable::new(
+ | 55| 1| |_| unsafe { unreachable_unchecked() }, // clone
+ | 56| 1| |_| unsafe { unreachable_unchecked() }, // wake
+ | 57| 1| |_| unsafe { unreachable_unchecked() }, // wake_by_ref
+ | 58| 1| |_| (),
+ | 59| 1| );
+ | 60| 1| let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
+ | 61| 1| let mut context = Context::from_waker(&waker);
+ | 62| |
+ | 63| | loop {
+ | 64| 1| if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
+ | 65| 1| break val;
+ | 66| 0| }
+ | 67| | }
+ | 68| 1| }
+ ------------------
+ 69| |}
+
diff --git a/tests/run-coverage/async2.rs b/tests/run-coverage/async2.rs
new file mode 100644
index 000000000..959d48ce9
--- /dev/null
+++ b/tests/run-coverage/async2.rs
@@ -0,0 +1,69 @@
+// compile-flags: --edition=2018
+
+use core::{
+ future::Future,
+ marker::Send,
+ pin::Pin,
+};
+
+fn non_async_func() {
+ println!("non_async_func was covered");
+ let b = true;
+ if b {
+ println!("non_async_func println in block");
+ }
+}
+
+
+
+
+async fn async_func() {
+ println!("async_func was covered");
+ let b = true;
+ if b {
+ println!("async_func println in block");
+ }
+}
+
+
+
+
+async fn async_func_just_println() {
+ println!("async_func_just_println was covered");
+}
+
+fn main() {
+ println!("codecovsample::main");
+
+ non_async_func();
+
+ executor::block_on(async_func());
+ executor::block_on(async_func_just_println());
+}
+
+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;
+ }
+ }
+ }
+}
diff --git a/tests/run-coverage/auxiliary/inline_always_with_dead_code.rs b/tests/run-coverage/auxiliary/inline_always_with_dead_code.rs
new file mode 100644
index 000000000..2b21dee6c
--- /dev/null
+++ b/tests/run-coverage/auxiliary/inline_always_with_dead_code.rs
@@ -0,0 +1,22 @@
+// compile-flags: -Cinstrument-coverage -Ccodegen-units=4 -Copt-level=0
+
+#![allow(dead_code)]
+
+mod foo {
+ #[inline(always)]
+ pub fn called() { }
+
+ fn uncalled() { }
+}
+
+pub mod bar {
+ pub fn call_me() {
+ super::foo::called();
+ }
+}
+
+pub mod baz {
+ pub fn call_me() {
+ super::foo::called();
+ }
+}
diff --git a/tests/run-coverage/auxiliary/unused_mod_helper.rs b/tests/run-coverage/auxiliary/unused_mod_helper.rs
new file mode 100644
index 000000000..ae1cc1531
--- /dev/null
+++ b/tests/run-coverage/auxiliary/unused_mod_helper.rs
@@ -0,0 +1,3 @@
+pub fn never_called_function() {
+ println!("I am never called");
+}
diff --git a/tests/run-coverage/auxiliary/used_crate.rs b/tests/run-coverage/auxiliary/used_crate.rs
new file mode 100644
index 000000000..16592d48d
--- /dev/null
+++ b/tests/run-coverage/auxiliary/used_crate.rs
@@ -0,0 +1,100 @@
+#![allow(unused_assignments, unused_variables)]
+// compile-flags: -C opt-level=3
+use std::fmt::Debug; // ^^ validates coverage now works with optimizations
+
+pub fn used_function() {
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let is_true = std::env::args().len() == 1;
+ let mut countdown = 0;
+ if is_true {
+ countdown = 10;
+ }
+ use_this_lib_crate();
+}
+
+pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) {
+ println!("used_only_from_bin_crate_generic_function with {:?}", arg);
+}
+// Expect for above function: `Unexecuted instantiation` (see below)
+pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) {
+ println!("used_only_from_this_lib_crate_generic_function with {:?}", arg);
+}
+
+pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ println!("used_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+}
+
+pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+}
+
+pub fn unused_generic_function<T: Debug>(arg: T) {
+ println!("unused_generic_function with {:?}", arg);
+}
+
+pub fn unused_function() {
+ let is_true = std::env::args().len() == 1;
+ let mut countdown = 2;
+ if !is_true {
+ countdown = 20;
+ }
+}
+
+fn unused_private_function() {
+ let is_true = std::env::args().len() == 1;
+ let mut countdown = 2;
+ if !is_true {
+ countdown = 20;
+ }
+}
+
+fn use_this_lib_crate() {
+ used_from_bin_crate_and_lib_crate_generic_function("used from library used_crate.rs");
+ used_with_same_type_from_bin_crate_and_lib_crate_generic_function(
+ "used from library used_crate.rs",
+ );
+ let some_vec = vec![5, 6, 7, 8];
+ used_only_from_this_lib_crate_generic_function(some_vec);
+ used_only_from_this_lib_crate_generic_function("used ONLY from library used_crate.rs");
+}
+
+// FIXME(#79651): "Unexecuted instantiation" errors appear in coverage results,
+// for example:
+//
+// | Unexecuted instantiation: used_crate::used_only_from_bin_crate_generic_function::<_>
+//
+// These notices appear when `llvm-cov` shows instantiations. This may be a
+// default option, but it can be suppressed with:
+//
+// ```shell
+// $ `llvm-cov show --show-instantiations=0 ...`
+// ```
+//
+// The notice is triggered because the function is unused by the library itself,
+// and when the library is compiled, a synthetic function is generated, so
+// unused function coverage can be reported. Coverage can be skipped for unused
+// generic functions with:
+//
+// ```shell
+// $ `rustc -Zunstable-options -C instrument-coverage=except-unused-generics ...`
+// ```
+//
+// Even though this function is used by `uses_crate.rs` (and
+// counted), with substitutions for `T`, those instantiations are only generated
+// when the generic function is actually used (from the binary, not from this
+// library crate). So the test result shows coverage for all instantiated
+// versions and their generic type substitutions, plus the `Unexecuted
+// instantiation` message for the non-substituted version. This is valid, but
+// unfortunately a little confusing.
+//
+// The library crate has its own coverage map, and the only way to show unused
+// coverage of a generic function is to include the generic function in the
+// coverage map, marked as an "unused function". If the library were used by
+// another binary that never used this generic function, then it would be valid
+// to show the unused generic, with unknown substitution (`_`).
+//
+// The alternative is to exclude all generics from being included in the "unused
+// functions" list, which would then omit coverage results for
+// `unused_generic_function<T>()`, below.
diff --git a/tests/run-coverage/auxiliary/used_inline_crate.rs b/tests/run-coverage/auxiliary/used_inline_crate.rs
new file mode 100644
index 000000000..8b8e9d548
--- /dev/null
+++ b/tests/run-coverage/auxiliary/used_inline_crate.rs
@@ -0,0 +1,90 @@
+#![allow(unused_assignments, unused_variables)]
+
+// compile-flags: -C opt-level=3
+// ^^ validates coverage now works with optimizations
+use std::fmt::Debug;
+
+pub fn used_function() {
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let is_true = std::env::args().len() == 1;
+ let mut countdown = 0;
+ if is_true {
+ countdown = 10;
+ }
+ use_this_lib_crate();
+}
+
+#[inline(always)]
+pub fn used_inline_function() {
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let is_true = std::env::args().len() == 1;
+ let mut countdown = 0;
+ if is_true {
+ countdown = 10;
+ }
+ use_this_lib_crate();
+}
+
+
+
+
+
+
+
+#[inline(always)]
+pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) {
+ println!("used_only_from_bin_crate_generic_function with {:?}", arg);
+}
+// Expect for above function: `Unexecuted instantiation` (see notes in `used_crate.rs`)
+
+#[inline(always)]
+pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) {
+ println!("used_only_from_this_lib_crate_generic_function with {:?}", arg);
+}
+
+#[inline(always)]
+pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ println!("used_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+}
+
+#[inline(always)]
+pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+}
+
+#[inline(always)]
+pub fn unused_generic_function<T: Debug>(arg: T) {
+ println!("unused_generic_function with {:?}", arg);
+}
+
+#[inline(always)]
+pub fn unused_function() {
+ let is_true = std::env::args().len() == 1;
+ let mut countdown = 2;
+ if !is_true {
+ countdown = 20;
+ }
+}
+
+#[inline(always)]
+fn unused_private_function() {
+ let is_true = std::env::args().len() == 1;
+ let mut countdown = 2;
+ if !is_true {
+ countdown = 20;
+ }
+}
+
+fn use_this_lib_crate() {
+ used_from_bin_crate_and_lib_crate_generic_function("used from library used_crate.rs");
+ used_with_same_type_from_bin_crate_and_lib_crate_generic_function(
+ "used from library used_crate.rs",
+ );
+ let some_vec = vec![5, 6, 7, 8];
+ used_only_from_this_lib_crate_generic_function(some_vec);
+ used_only_from_this_lib_crate_generic_function("used ONLY from library used_crate.rs");
+}
diff --git a/tests/run-coverage/closure.coverage b/tests/run-coverage/closure.coverage
new file mode 100644
index 000000000..45d36b72e
--- /dev/null
+++ b/tests/run-coverage/closure.coverage
@@ -0,0 +1,222 @@
+ 1| |#![allow(unused_assignments, unused_variables)]
+ 2| |// compile-flags: -C opt-level=2
+ 3| 1|fn main() { // ^^ fix described in rustc_middle/mir/mono.rs
+ 4| 1| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 5| 1| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 6| 1| // dependent conditions.
+ 7| 1| let is_true = std::env::args().len() == 1;
+ 8| 1| let is_false = ! is_true;
+ 9| 1|
+ 10| 1| let mut some_string = Some(String::from("the string content"));
+ 11| 1| println!(
+ 12| 1| "The string or alt: {}"
+ 13| 1| ,
+ 14| 1| some_string
+ 15| 1| .
+ 16| 1| unwrap_or_else
+ 17| 1| (
+ 18| 1| ||
+ 19| 0| {
+ 20| 0| let mut countdown = 0;
+ 21| 0| if is_false {
+ 22| 0| countdown = 10;
+ 23| 0| }
+ 24| 0| "alt string 1".to_owned()
+ 25| 1| }
+ 26| 1| )
+ 27| 1| );
+ 28| 1|
+ 29| 1| some_string = Some(String::from("the string content"));
+ 30| 1| let
+ 31| 1| a
+ 32| | =
+ 33| | ||
+ 34| 0| {
+ 35| 0| let mut countdown = 0;
+ 36| 0| if is_false {
+ 37| 0| countdown = 10;
+ 38| 0| }
+ 39| 0| "alt string 2".to_owned()
+ 40| 0| };
+ 41| 1| println!(
+ 42| 1| "The string or alt: {}"
+ 43| 1| ,
+ 44| 1| some_string
+ 45| 1| .
+ 46| 1| unwrap_or_else
+ 47| 1| (
+ 48| 1| a
+ 49| 1| )
+ 50| 1| );
+ 51| 1|
+ 52| 1| some_string = None;
+ 53| 1| println!(
+ 54| 1| "The string or alt: {}"
+ 55| 1| ,
+ 56| 1| some_string
+ 57| 1| .
+ 58| 1| unwrap_or_else
+ 59| 1| (
+ 60| 1| ||
+ 61| 1| {
+ 62| 1| let mut countdown = 0;
+ 63| 1| if is_false {
+ 64| 0| countdown = 10;
+ 65| 1| }
+ 66| 1| "alt string 3".to_owned()
+ 67| 1| }
+ 68| 1| )
+ 69| 1| );
+ 70| 1|
+ 71| 1| some_string = None;
+ 72| 1| let
+ 73| 1| a
+ 74| 1| =
+ 75| 1| ||
+ 76| 1| {
+ 77| 1| let mut countdown = 0;
+ 78| 1| if is_false {
+ 79| 0| countdown = 10;
+ 80| 1| }
+ 81| 1| "alt string 4".to_owned()
+ 82| 1| };
+ 83| 1| println!(
+ 84| 1| "The string or alt: {}"
+ 85| 1| ,
+ 86| 1| some_string
+ 87| 1| .
+ 88| 1| unwrap_or_else
+ 89| 1| (
+ 90| 1| a
+ 91| 1| )
+ 92| 1| );
+ 93| 1|
+ 94| 1| let
+ 95| 1| quote_closure
+ 96| 1| =
+ 97| 1| |val|
+ 98| 5| {
+ 99| 5| let mut countdown = 0;
+ 100| 5| if is_false {
+ 101| 0| countdown = 10;
+ 102| 5| }
+ 103| 5| format!("'{}'", val)
+ 104| 5| };
+ 105| 1| println!(
+ 106| 1| "Repeated, quoted string: {:?}"
+ 107| 1| ,
+ 108| 1| std::iter::repeat("repeat me")
+ 109| 1| .take(5)
+ 110| 1| .map
+ 111| 1| (
+ 112| 1| quote_closure
+ 113| 1| )
+ 114| 1| .collect::<Vec<_>>()
+ 115| 1| );
+ 116| 1|
+ 117| 1| let
+ 118| 1| _unused_closure
+ 119| | =
+ 120| | |
+ 121| | mut countdown
+ 122| | |
+ 123| 0| {
+ 124| 0| if is_false {
+ 125| 0| countdown = 10;
+ 126| 0| }
+ 127| 0| "closure should be unused".to_owned()
+ 128| 0| };
+ 129| |
+ 130| 1| let mut countdown = 10;
+ 131| 1| let _short_unused_closure = | _unused_arg: u8 | countdown += 1;
+ ^0
+ 132| |
+ 133| |
+ 134| 1| let short_used_covered_closure_macro = | used_arg: u8 | println!("called");
+ 135| 1| let short_used_not_covered_closure_macro = | used_arg: u8 | println!("not called");
+ ^0
+ 136| 1| let _short_unused_closure_macro = | _unused_arg: u8 | println!("not called");
+ ^0
+ 137| |
+ 138| |
+ 139| |
+ 140| |
+ 141| 1| let _short_unused_closure_block = | _unused_arg: u8 | { println!("not called") };
+ ^0
+ 142| |
+ 143| 1| let _shortish_unused_closure = | _unused_arg: u8 | {
+ 144| 0| println!("not called")
+ 145| 0| };
+ 146| |
+ 147| 1| let _as_short_unused_closure = |
+ 148| | _unused_arg: u8
+ 149| 0| | { println!("not called") };
+ 150| |
+ 151| 1| let _almost_as_short_unused_closure = |
+ 152| | _unused_arg: u8
+ 153| 0| | { println!("not called") }
+ 154| | ;
+ 155| |
+ 156| |
+ 157| |
+ 158| |
+ 159| |
+ 160| 1| let _short_unused_closure_line_break_no_block = | _unused_arg: u8 |
+ 161| 0|println!("not called")
+ 162| | ;
+ 163| |
+ 164| 1| let _short_unused_closure_line_break_no_block2 =
+ 165| | | _unused_arg: u8 |
+ 166| 0| println!(
+ 167| 0| "not called"
+ 168| 0| )
+ 169| | ;
+ 170| |
+ 171| 1| let short_used_not_covered_closure_line_break_no_block_embedded_branch =
+ 172| | | _unused_arg: u8 |
+ 173| 0| println!(
+ 174| 0| "not called: {}",
+ 175| 0| if is_true { "check" } else { "me" }
+ 176| 0| )
+ 177| | ;
+ 178| |
+ 179| 1| let short_used_not_covered_closure_line_break_block_embedded_branch =
+ 180| 1| | _unused_arg: u8 |
+ 181| 0| {
+ 182| 0| println!(
+ 183| 0| "not called: {}",
+ 184| 0| if is_true { "check" } else { "me" }
+ 185| | )
+ 186| 0| }
+ 187| | ;
+ 188| |
+ 189| 1| let short_used_covered_closure_line_break_no_block_embedded_branch =
+ 190| 1| | _unused_arg: u8 |
+ 191| 1| println!(
+ 192| 1| "not called: {}",
+ 193| 1| if is_true { "check" } else { "me" }
+ ^0
+ 194| 1| )
+ 195| | ;
+ 196| |
+ 197| 1| let short_used_covered_closure_line_break_block_embedded_branch =
+ 198| 1| | _unused_arg: u8 |
+ 199| 1| {
+ 200| 1| println!(
+ 201| 1| "not called: {}",
+ 202| 1| if is_true { "check" } else { "me" }
+ ^0
+ 203| | )
+ 204| 1| }
+ 205| | ;
+ 206| |
+ 207| 1| if is_false {
+ 208| 0| short_used_not_covered_closure_macro(0);
+ 209| 0| short_used_not_covered_closure_line_break_no_block_embedded_branch(0);
+ 210| 0| short_used_not_covered_closure_line_break_block_embedded_branch(0);
+ 211| 1| }
+ 212| 1| short_used_covered_closure_macro(0);
+ 213| 1| short_used_covered_closure_line_break_no_block_embedded_branch(0);
+ 214| 1| short_used_covered_closure_line_break_block_embedded_branch(0);
+ 215| 1|}
+
diff --git a/tests/run-coverage/closure.rs b/tests/run-coverage/closure.rs
new file mode 100644
index 000000000..eb3a1ebff
--- /dev/null
+++ b/tests/run-coverage/closure.rs
@@ -0,0 +1,215 @@
+#![allow(unused_assignments, unused_variables)]
+// compile-flags: -C opt-level=2
+fn main() { // ^^ fix described in rustc_middle/mir/mono.rs
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let is_true = std::env::args().len() == 1;
+ let is_false = ! is_true;
+
+ let mut some_string = Some(String::from("the string content"));
+ println!(
+ "The string or alt: {}"
+ ,
+ some_string
+ .
+ unwrap_or_else
+ (
+ ||
+ {
+ let mut countdown = 0;
+ if is_false {
+ countdown = 10;
+ }
+ "alt string 1".to_owned()
+ }
+ )
+ );
+
+ some_string = Some(String::from("the string content"));
+ let
+ a
+ =
+ ||
+ {
+ let mut countdown = 0;
+ if is_false {
+ countdown = 10;
+ }
+ "alt string 2".to_owned()
+ };
+ println!(
+ "The string or alt: {}"
+ ,
+ some_string
+ .
+ unwrap_or_else
+ (
+ a
+ )
+ );
+
+ some_string = None;
+ println!(
+ "The string or alt: {}"
+ ,
+ some_string
+ .
+ unwrap_or_else
+ (
+ ||
+ {
+ let mut countdown = 0;
+ if is_false {
+ countdown = 10;
+ }
+ "alt string 3".to_owned()
+ }
+ )
+ );
+
+ some_string = None;
+ let
+ a
+ =
+ ||
+ {
+ let mut countdown = 0;
+ if is_false {
+ countdown = 10;
+ }
+ "alt string 4".to_owned()
+ };
+ println!(
+ "The string or alt: {}"
+ ,
+ some_string
+ .
+ unwrap_or_else
+ (
+ a
+ )
+ );
+
+ let
+ quote_closure
+ =
+ |val|
+ {
+ let mut countdown = 0;
+ if is_false {
+ countdown = 10;
+ }
+ format!("'{}'", val)
+ };
+ println!(
+ "Repeated, quoted string: {:?}"
+ ,
+ std::iter::repeat("repeat me")
+ .take(5)
+ .map
+ (
+ quote_closure
+ )
+ .collect::<Vec<_>>()
+ );
+
+ let
+ _unused_closure
+ =
+ |
+ mut countdown
+ |
+ {
+ if is_false {
+ countdown = 10;
+ }
+ "closure should be unused".to_owned()
+ };
+
+ let mut countdown = 10;
+ let _short_unused_closure = | _unused_arg: u8 | countdown += 1;
+
+
+ let short_used_covered_closure_macro = | used_arg: u8 | println!("called");
+ let short_used_not_covered_closure_macro = | used_arg: u8 | println!("not called");
+ let _short_unused_closure_macro = | _unused_arg: u8 | println!("not called");
+
+
+
+
+ let _short_unused_closure_block = | _unused_arg: u8 | { println!("not called") };
+
+ let _shortish_unused_closure = | _unused_arg: u8 | {
+ println!("not called")
+ };
+
+ let _as_short_unused_closure = |
+ _unused_arg: u8
+ | { println!("not called") };
+
+ let _almost_as_short_unused_closure = |
+ _unused_arg: u8
+ | { println!("not called") }
+ ;
+
+
+
+
+
+ let _short_unused_closure_line_break_no_block = | _unused_arg: u8 |
+println!("not called")
+ ;
+
+ let _short_unused_closure_line_break_no_block2 =
+ | _unused_arg: u8 |
+ println!(
+ "not called"
+ )
+ ;
+
+ let short_used_not_covered_closure_line_break_no_block_embedded_branch =
+ | _unused_arg: u8 |
+ println!(
+ "not called: {}",
+ if is_true { "check" } else { "me" }
+ )
+ ;
+
+ let short_used_not_covered_closure_line_break_block_embedded_branch =
+ | _unused_arg: u8 |
+ {
+ println!(
+ "not called: {}",
+ if is_true { "check" } else { "me" }
+ )
+ }
+ ;
+
+ let short_used_covered_closure_line_break_no_block_embedded_branch =
+ | _unused_arg: u8 |
+ println!(
+ "not called: {}",
+ if is_true { "check" } else { "me" }
+ )
+ ;
+
+ let short_used_covered_closure_line_break_block_embedded_branch =
+ | _unused_arg: u8 |
+ {
+ println!(
+ "not called: {}",
+ if is_true { "check" } else { "me" }
+ )
+ }
+ ;
+
+ if is_false {
+ short_used_not_covered_closure_macro(0);
+ short_used_not_covered_closure_line_break_no_block_embedded_branch(0);
+ short_used_not_covered_closure_line_break_block_embedded_branch(0);
+ }
+ short_used_covered_closure_macro(0);
+ short_used_covered_closure_line_break_no_block_embedded_branch(0);
+ short_used_covered_closure_line_break_block_embedded_branch(0);
+}
diff --git a/tests/run-coverage/closure_macro.coverage b/tests/run-coverage/closure_macro.coverage
new file mode 100644
index 000000000..87f701476
--- /dev/null
+++ b/tests/run-coverage/closure_macro.coverage
@@ -0,0 +1,42 @@
+ 1| |// compile-flags: --edition=2018
+ 2| |#![feature(no_coverage)]
+ 3| |
+ 4| |macro_rules! bail {
+ 5| | ($msg:literal $(,)?) => {
+ 6| | if $msg.len() > 0 {
+ 7| | println!("no msg");
+ 8| | } else {
+ 9| | println!($msg);
+ 10| | }
+ 11| | return Err(String::from($msg));
+ 12| | };
+ 13| |}
+ 14| |
+ 15| |macro_rules! on_error {
+ 16| | ($value:expr, $error_message:expr) => {
+ 17| | $value.or_else(|e| { // FIXME(85000): no coverage in closure macros
+ 18| | let message = format!($error_message, e);
+ 19| | if message.len() > 0 {
+ 20| | println!("{}", message);
+ 21| | Ok(String::from("ok"))
+ 22| | } else {
+ 23| | bail!("error");
+ 24| | }
+ 25| | })
+ 26| | };
+ 27| |}
+ 28| |
+ 29| 1|fn load_configuration_files() -> Result<String, String> {
+ 30| 1| Ok(String::from("config"))
+ 31| 1|}
+ 32| |
+ 33| 1|pub fn main() -> Result<(), String> {
+ 34| 1| println!("Starting service");
+ 35| 1| let config = on_error!(load_configuration_files(), "Error loading configs: {}")?;
+ ^0
+ 36| |
+ 37| 1| let startup_delay_duration = String::from("arg");
+ 38| 1| let _ = (config, startup_delay_duration);
+ 39| 1| Ok(())
+ 40| 1|}
+
diff --git a/tests/run-coverage/closure_macro.rs b/tests/run-coverage/closure_macro.rs
new file mode 100644
index 000000000..5e3b00d1e
--- /dev/null
+++ b/tests/run-coverage/closure_macro.rs
@@ -0,0 +1,40 @@
+// compile-flags: --edition=2018
+#![feature(no_coverage)]
+
+macro_rules! bail {
+ ($msg:literal $(,)?) => {
+ if $msg.len() > 0 {
+ println!("no msg");
+ } else {
+ println!($msg);
+ }
+ return Err(String::from($msg));
+ };
+}
+
+macro_rules! on_error {
+ ($value:expr, $error_message:expr) => {
+ $value.or_else(|e| { // FIXME(85000): no coverage in closure macros
+ let message = format!($error_message, e);
+ if message.len() > 0 {
+ println!("{}", message);
+ Ok(String::from("ok"))
+ } else {
+ bail!("error");
+ }
+ })
+ };
+}
+
+fn load_configuration_files() -> Result<String, String> {
+ Ok(String::from("config"))
+}
+
+pub fn main() -> Result<(), String> {
+ println!("Starting service");
+ let config = on_error!(load_configuration_files(), "Error loading configs: {}")?;
+
+ let startup_delay_duration = String::from("arg");
+ let _ = (config, startup_delay_duration);
+ Ok(())
+}
diff --git a/tests/run-coverage/closure_macro_async.coverage b/tests/run-coverage/closure_macro_async.coverage
new file mode 100644
index 000000000..2b5418132
--- /dev/null
+++ b/tests/run-coverage/closure_macro_async.coverage
@@ -0,0 +1,83 @@
+ 1| |// compile-flags: --edition=2018
+ 2| |#![feature(no_coverage)]
+ 3| |
+ 4| |macro_rules! bail {
+ 5| | ($msg:literal $(,)?) => {
+ 6| | if $msg.len() > 0 {
+ 7| | println!("no msg");
+ 8| | } else {
+ 9| | println!($msg);
+ 10| | }
+ 11| | return Err(String::from($msg));
+ 12| | };
+ 13| |}
+ 14| |
+ 15| |macro_rules! on_error {
+ 16| | ($value:expr, $error_message:expr) => {
+ 17| | $value.or_else(|e| { // FIXME(85000): no coverage in closure macros
+ 18| | let message = format!($error_message, e);
+ 19| | if message.len() > 0 {
+ 20| | println!("{}", message);
+ 21| | Ok(String::from("ok"))
+ 22| | } else {
+ 23| | bail!("error");
+ 24| | }
+ 25| | })
+ 26| | };
+ 27| |}
+ 28| |
+ 29| 1|fn load_configuration_files() -> Result<String, String> {
+ 30| 1| Ok(String::from("config"))
+ 31| 1|}
+ 32| |
+ 33| 1|pub async fn test() -> Result<(), String> {
+ 34| 1| println!("Starting service");
+ 35| 1| let config = on_error!(load_configuration_files(), "Error loading configs: {}")?;
+ ^0
+ 36| |
+ 37| 1| let startup_delay_duration = String::from("arg");
+ 38| 1| let _ = (config, startup_delay_duration);
+ 39| 1| Ok(())
+ 40| 1|}
+ 41| |
+ 42| |#[no_coverage]
+ 43| |fn main() {
+ 44| | executor::block_on(test());
+ 45| |}
+ 46| |
+ 47| |mod executor {
+ 48| | use core::{
+ 49| | future::Future,
+ 50| | pin::Pin,
+ 51| | task::{Context, Poll, RawWaker, RawWakerVTable, Waker},
+ 52| | };
+ 53| |
+ 54| | #[no_coverage]
+ 55| | pub fn block_on<F: Future>(mut future: F) -> F::Output {
+ 56| | let mut future = unsafe { Pin::new_unchecked(&mut future) };
+ 57| | use std::hint::unreachable_unchecked;
+ 58| | static VTABLE: RawWakerVTable = RawWakerVTable::new(
+ 59| |
+ 60| | #[no_coverage]
+ 61| | |_| unsafe { unreachable_unchecked() }, // clone
+ 62| |
+ 63| | #[no_coverage]
+ 64| | |_| unsafe { unreachable_unchecked() }, // wake
+ 65| |
+ 66| | #[no_coverage]
+ 67| | |_| unsafe { unreachable_unchecked() }, // wake_by_ref
+ 68| |
+ 69| | #[no_coverage]
+ 70| | |_| (),
+ 71| | );
+ 72| | let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
+ 73| | let mut context = Context::from_waker(&waker);
+ 74| |
+ 75| | loop {
+ 76| | if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
+ 77| | break val;
+ 78| | }
+ 79| | }
+ 80| | }
+ 81| |}
+
diff --git a/tests/run-coverage/closure_macro_async.rs b/tests/run-coverage/closure_macro_async.rs
new file mode 100644
index 000000000..e3e89e9c8
--- /dev/null
+++ b/tests/run-coverage/closure_macro_async.rs
@@ -0,0 +1,81 @@
+// compile-flags: --edition=2018
+#![feature(no_coverage)]
+
+macro_rules! bail {
+ ($msg:literal $(,)?) => {
+ if $msg.len() > 0 {
+ println!("no msg");
+ } else {
+ println!($msg);
+ }
+ return Err(String::from($msg));
+ };
+}
+
+macro_rules! on_error {
+ ($value:expr, $error_message:expr) => {
+ $value.or_else(|e| { // FIXME(85000): no coverage in closure macros
+ let message = format!($error_message, e);
+ if message.len() > 0 {
+ println!("{}", message);
+ Ok(String::from("ok"))
+ } else {
+ bail!("error");
+ }
+ })
+ };
+}
+
+fn load_configuration_files() -> Result<String, String> {
+ Ok(String::from("config"))
+}
+
+pub async fn test() -> Result<(), String> {
+ println!("Starting service");
+ let config = on_error!(load_configuration_files(), "Error loading configs: {}")?;
+
+ let startup_delay_duration = String::from("arg");
+ let _ = (config, startup_delay_duration);
+ Ok(())
+}
+
+#[no_coverage]
+fn main() {
+ executor::block_on(test());
+}
+
+mod executor {
+ use core::{
+ future::Future,
+ pin::Pin,
+ task::{Context, Poll, RawWaker, RawWakerVTable, Waker},
+ };
+
+ #[no_coverage]
+ 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(
+
+ #[no_coverage]
+ |_| unsafe { unreachable_unchecked() }, // clone
+
+ #[no_coverage]
+ |_| unsafe { unreachable_unchecked() }, // wake
+
+ #[no_coverage]
+ |_| unsafe { unreachable_unchecked() }, // wake_by_ref
+
+ #[no_coverage]
+ |_| (),
+ );
+ 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;
+ }
+ }
+ }
+}
diff --git a/tests/run-coverage/conditions.coverage b/tests/run-coverage/conditions.coverage
new file mode 100644
index 000000000..2d8a98a5d
--- /dev/null
+++ b/tests/run-coverage/conditions.coverage
@@ -0,0 +1,94 @@
+ 1| |#![allow(unused_assignments, unused_variables)]
+ 2| |
+ 3| 1|fn main() {
+ 4| 1| let mut countdown = 0;
+ 5| 1| if true {
+ 6| 1| countdown = 10;
+ 7| 1| }
+ ^0
+ 8| |
+ 9| | const B: u32 = 100;
+ 10| 1| let x = if countdown > 7 {
+ 11| 1| countdown -= 4;
+ 12| 1| B
+ 13| 0| } else if countdown > 2 {
+ 14| 0| if countdown < 1 || countdown > 5 || countdown != 9 {
+ 15| 0| countdown = 0;
+ 16| 0| }
+ 17| 0| countdown -= 5;
+ 18| 0| countdown
+ 19| | } else {
+ 20| 0| return;
+ 21| | };
+ 22| |
+ 23| 1| let mut countdown = 0;
+ 24| 1| if true {
+ 25| 1| countdown = 10;
+ 26| 1| }
+ ^0
+ 27| |
+ 28| 1| if countdown > 7 {
+ 29| 1| countdown -= 4;
+ 30| 1| } else if countdown > 2 {
+ ^0
+ 31| 0| if countdown < 1 || countdown > 5 || countdown != 9 {
+ 32| 0| countdown = 0;
+ 33| 0| }
+ 34| 0| countdown -= 5;
+ 35| | } else {
+ 36| 0| return;
+ 37| | }
+ 38| |
+ 39| 1| if true {
+ 40| 1| let mut countdown = 0;
+ 41| 1| if true {
+ 42| 1| countdown = 10;
+ 43| 1| }
+ ^0
+ 44| |
+ 45| 1| if countdown > 7 {
+ 46| 1| countdown -= 4;
+ 47| 1| }
+ 48| 0| else if countdown > 2 {
+ 49| 0| if countdown < 1 || countdown > 5 || countdown != 9 {
+ 50| 0| countdown = 0;
+ 51| 0| }
+ 52| 0| countdown -= 5;
+ 53| | } else {
+ 54| 0| return;
+ 55| | }
+ 56| 0| }
+ 57| |
+ 58| |
+ 59| 1| let mut countdown = 0;
+ 60| 1| if true {
+ 61| 1| countdown = 1;
+ 62| 1| }
+ ^0
+ 63| |
+ 64| 1| let z = if countdown > 7 {
+ ^0
+ 65| 0| countdown -= 4;
+ 66| 1| } else if countdown > 2 {
+ 67| 0| if countdown < 1 || countdown > 5 || countdown != 9 {
+ 68| 0| countdown = 0;
+ 69| 0| }
+ 70| 0| countdown -= 5;
+ 71| | } else {
+ 72| 1| let should_be_reachable = countdown;
+ 73| 1| println!("reached");
+ 74| 1| return;
+ 75| | };
+ 76| |
+ 77| 0| let w = if countdown > 7 {
+ 78| 0| countdown -= 4;
+ 79| 0| } else if countdown > 2 {
+ 80| 0| if countdown < 1 || countdown > 5 || countdown != 9 {
+ 81| 0| countdown = 0;
+ 82| 0| }
+ 83| 0| countdown -= 5;
+ 84| | } else {
+ 85| 0| return;
+ 86| | };
+ 87| 1|}
+
diff --git a/tests/run-coverage/conditions.rs b/tests/run-coverage/conditions.rs
new file mode 100644
index 000000000..057599d1b
--- /dev/null
+++ b/tests/run-coverage/conditions.rs
@@ -0,0 +1,87 @@
+#![allow(unused_assignments, unused_variables)]
+
+fn main() {
+ let mut countdown = 0;
+ if true {
+ countdown = 10;
+ }
+
+ const B: u32 = 100;
+ let x = if countdown > 7 {
+ countdown -= 4;
+ B
+ } else if countdown > 2 {
+ if countdown < 1 || countdown > 5 || countdown != 9 {
+ countdown = 0;
+ }
+ countdown -= 5;
+ countdown
+ } else {
+ return;
+ };
+
+ let mut countdown = 0;
+ if true {
+ countdown = 10;
+ }
+
+ if countdown > 7 {
+ countdown -= 4;
+ } else if countdown > 2 {
+ if countdown < 1 || countdown > 5 || countdown != 9 {
+ countdown = 0;
+ }
+ countdown -= 5;
+ } else {
+ return;
+ }
+
+ if true {
+ let mut countdown = 0;
+ if true {
+ countdown = 10;
+ }
+
+ if countdown > 7 {
+ countdown -= 4;
+ }
+ else if countdown > 2 {
+ if countdown < 1 || countdown > 5 || countdown != 9 {
+ countdown = 0;
+ }
+ countdown -= 5;
+ } else {
+ return;
+ }
+ }
+
+
+ let mut countdown = 0;
+ if true {
+ countdown = 1;
+ }
+
+ let z = if countdown > 7 {
+ countdown -= 4;
+ } else if countdown > 2 {
+ if countdown < 1 || countdown > 5 || countdown != 9 {
+ countdown = 0;
+ }
+ countdown -= 5;
+ } else {
+ let should_be_reachable = countdown;
+ println!("reached");
+ return;
+ };
+
+ let w = if countdown > 7 {
+ countdown -= 4;
+ } else if countdown > 2 {
+ if countdown < 1 || countdown > 5 || countdown != 9 {
+ countdown = 0;
+ }
+ countdown -= 5;
+ } else {
+ return;
+ };
+}
diff --git a/tests/run-coverage/continue.coverage b/tests/run-coverage/continue.coverage
new file mode 100644
index 000000000..bf42924b1
--- /dev/null
+++ b/tests/run-coverage/continue.coverage
@@ -0,0 +1,70 @@
+ 1| |#![allow(unused_assignments, unused_variables)]
+ 2| |
+ 3| 1|fn main() {
+ 4| 1| let is_true = std::env::args().len() == 1;
+ 5| 1|
+ 6| 1| let mut x = 0;
+ 7| 11| for _ in 0..10 {
+ 8| 10| match is_true {
+ 9| | true => {
+ 10| 10| continue;
+ 11| | }
+ 12| 0| _ => {
+ 13| 0| x = 1;
+ 14| 0| }
+ 15| 0| }
+ 16| 0| x = 3;
+ 17| | }
+ 18| 11| for _ in 0..10 {
+ 19| 10| match is_true {
+ 20| 0| false => {
+ 21| 0| x = 1;
+ 22| 0| }
+ 23| | _ => {
+ 24| 10| continue;
+ 25| | }
+ 26| | }
+ 27| 0| x = 3;
+ 28| | }
+ 29| 11| for _ in 0..10 {
+ 30| 10| match is_true {
+ 31| 10| true => {
+ 32| 10| x = 1;
+ 33| 10| }
+ 34| | _ => {
+ 35| 0| continue;
+ 36| | }
+ 37| | }
+ 38| 10| x = 3;
+ 39| | }
+ 40| 11| for _ in 0..10 {
+ 41| 10| if is_true {
+ 42| 10| continue;
+ 43| 0| }
+ 44| 0| x = 3;
+ 45| | }
+ 46| 11| for _ in 0..10 {
+ 47| 10| match is_true {
+ 48| 0| false => {
+ 49| 0| x = 1;
+ 50| 0| }
+ 51| 10| _ => {
+ 52| 10| let _ = x;
+ 53| 10| }
+ 54| | }
+ 55| 10| x = 3;
+ 56| | }
+ 57| 1| for _ in 0..10 {
+ 58| 1| match is_true {
+ 59| 0| false => {
+ 60| 0| x = 1;
+ 61| 0| }
+ 62| | _ => {
+ 63| 1| break;
+ 64| | }
+ 65| | }
+ 66| 0| x = 3;
+ 67| | }
+ 68| 1| let _ = x;
+ 69| 1|}
+
diff --git a/tests/run-coverage/continue.rs b/tests/run-coverage/continue.rs
new file mode 100644
index 000000000..624aa9834
--- /dev/null
+++ b/tests/run-coverage/continue.rs
@@ -0,0 +1,69 @@
+#![allow(unused_assignments, unused_variables)]
+
+fn main() {
+ let is_true = std::env::args().len() == 1;
+
+ let mut x = 0;
+ for _ in 0..10 {
+ match is_true {
+ true => {
+ continue;
+ }
+ _ => {
+ x = 1;
+ }
+ }
+ x = 3;
+ }
+ for _ in 0..10 {
+ match is_true {
+ false => {
+ x = 1;
+ }
+ _ => {
+ continue;
+ }
+ }
+ x = 3;
+ }
+ for _ in 0..10 {
+ match is_true {
+ true => {
+ x = 1;
+ }
+ _ => {
+ continue;
+ }
+ }
+ x = 3;
+ }
+ for _ in 0..10 {
+ if is_true {
+ continue;
+ }
+ x = 3;
+ }
+ for _ in 0..10 {
+ match is_true {
+ false => {
+ x = 1;
+ }
+ _ => {
+ let _ = x;
+ }
+ }
+ x = 3;
+ }
+ for _ in 0..10 {
+ match is_true {
+ false => {
+ x = 1;
+ }
+ _ => {
+ break;
+ }
+ }
+ x = 3;
+ }
+ let _ = x;
+}
diff --git a/tests/run-coverage/dead_code.coverage b/tests/run-coverage/dead_code.coverage
new file mode 100644
index 000000000..09ff14c6f
--- /dev/null
+++ b/tests/run-coverage/dead_code.coverage
@@ -0,0 +1,39 @@
+ 1| |#![allow(unused_assignments, unused_variables)]
+ 2| |
+ 3| 0|pub fn unused_pub_fn_not_in_library() {
+ 4| 0| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 5| 0| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 6| 0| // dependent conditions.
+ 7| 0| let is_true = std::env::args().len() == 1;
+ 8| 0|
+ 9| 0| let mut countdown = 0;
+ 10| 0| if is_true {
+ 11| 0| countdown = 10;
+ 12| 0| }
+ 13| 0|}
+ 14| |
+ 15| 0|fn unused_fn() {
+ 16| 0| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 17| 0| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 18| 0| // dependent conditions.
+ 19| 0| let is_true = std::env::args().len() == 1;
+ 20| 0|
+ 21| 0| let mut countdown = 0;
+ 22| 0| if is_true {
+ 23| 0| countdown = 10;
+ 24| 0| }
+ 25| 0|}
+ 26| |
+ 27| 1|fn main() {
+ 28| 1| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 29| 1| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 30| 1| // dependent conditions.
+ 31| 1| let is_true = std::env::args().len() == 1;
+ 32| 1|
+ 33| 1| let mut countdown = 0;
+ 34| 1| if is_true {
+ 35| 1| countdown = 10;
+ 36| 1| }
+ ^0
+ 37| 1|}
+
diff --git a/tests/run-coverage/dead_code.rs b/tests/run-coverage/dead_code.rs
new file mode 100644
index 000000000..a1285df0e
--- /dev/null
+++ b/tests/run-coverage/dead_code.rs
@@ -0,0 +1,37 @@
+#![allow(unused_assignments, unused_variables)]
+
+pub fn unused_pub_fn_not_in_library() {
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let is_true = std::env::args().len() == 1;
+
+ let mut countdown = 0;
+ if is_true {
+ countdown = 10;
+ }
+}
+
+fn unused_fn() {
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let is_true = std::env::args().len() == 1;
+
+ let mut countdown = 0;
+ if is_true {
+ countdown = 10;
+ }
+}
+
+fn main() {
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let is_true = std::env::args().len() == 1;
+
+ let mut countdown = 0;
+ if is_true {
+ countdown = 10;
+ }
+}
diff --git a/tests/run-coverage/drop_trait.coverage b/tests/run-coverage/drop_trait.coverage
new file mode 100644
index 000000000..293001e95
--- /dev/null
+++ b/tests/run-coverage/drop_trait.coverage
@@ -0,0 +1,34 @@
+ 1| |#![allow(unused_assignments)]
+ 2| |// failure-status: 1
+ 3| |
+ 4| |struct Firework {
+ 5| | strength: i32,
+ 6| |}
+ 7| |
+ 8| |impl Drop for Firework {
+ 9| 2| fn drop(&mut self) {
+ 10| 2| println!("BOOM times {}!!!", self.strength);
+ 11| 2| }
+ 12| |}
+ 13| |
+ 14| 1|fn main() -> Result<(),u8> {
+ 15| 1| let _firecracker = Firework { strength: 1 };
+ 16| 1|
+ 17| 1| let _tnt = Firework { strength: 100 };
+ 18| 1|
+ 19| 1| if true {
+ 20| 1| println!("Exiting with error...");
+ 21| 1| return Err(1);
+ 22| 0| }
+ 23| 0|
+ 24| 0| let _ = Firework { strength: 1000 };
+ 25| 0|
+ 26| 0| Ok(())
+ 27| 1|}
+ 28| |
+ 29| |// Expected program output:
+ 30| |// Exiting with error...
+ 31| |// BOOM times 100!!!
+ 32| |// BOOM times 1!!!
+ 33| |// Error: 1
+
diff --git a/tests/run-coverage/drop_trait.rs b/tests/run-coverage/drop_trait.rs
new file mode 100644
index 000000000..a9b5d1d1e
--- /dev/null
+++ b/tests/run-coverage/drop_trait.rs
@@ -0,0 +1,33 @@
+#![allow(unused_assignments)]
+// failure-status: 1
+
+struct Firework {
+ strength: i32,
+}
+
+impl Drop for Firework {
+ fn drop(&mut self) {
+ println!("BOOM times {}!!!", self.strength);
+ }
+}
+
+fn main() -> Result<(),u8> {
+ let _firecracker = Firework { strength: 1 };
+
+ let _tnt = Firework { strength: 100 };
+
+ if true {
+ println!("Exiting with error...");
+ return Err(1);
+ }
+
+ let _ = Firework { strength: 1000 };
+
+ Ok(())
+}
+
+// Expected program output:
+// Exiting with error...
+// BOOM times 100!!!
+// BOOM times 1!!!
+// Error: 1
diff --git a/tests/run-coverage/generator.coverage b/tests/run-coverage/generator.coverage
new file mode 100644
index 000000000..0fb3808ff
--- /dev/null
+++ b/tests/run-coverage/generator.coverage
@@ -0,0 +1,32 @@
+ 1| |#![feature(generators, generator_trait)]
+ 2| |
+ 3| |use std::ops::{Generator, GeneratorState};
+ 4| |use std::pin::Pin;
+ 5| |
+ 6| |// The following implementation of a function called from a `yield` statement
+ 7| |// (apparently requiring the Result and the `String` type or constructor)
+ 8| |// creates conditions where the `generator::StateTransform` MIR transform will
+ 9| |// drop all `Counter` `Coverage` statements from a MIR. `simplify.rs` has logic
+ 10| |// to handle this condition, and still report dead block coverage.
+ 11| 1|fn get_u32(val: bool) -> Result<u32, String> {
+ 12| 1| if val { Ok(1) } else { Err(String::from("some error")) }
+ ^0
+ 13| 1|}
+ 14| |
+ 15| 1|fn main() {
+ 16| 1| let is_true = std::env::args().len() == 1;
+ 17| 1| let mut generator = || {
+ 18| 1| yield get_u32(is_true);
+ 19| 1| return "foo";
+ 20| 1| };
+ 21| |
+ 22| 1| match Pin::new(&mut generator).resume(()) {
+ 23| 1| GeneratorState::Yielded(Ok(1)) => {}
+ 24| 0| _ => panic!("unexpected return from resume"),
+ 25| | }
+ 26| 1| match Pin::new(&mut generator).resume(()) {
+ 27| 1| GeneratorState::Complete("foo") => {}
+ 28| 0| _ => panic!("unexpected return from resume"),
+ 29| | }
+ 30| 1|}
+
diff --git a/tests/run-coverage/generator.rs b/tests/run-coverage/generator.rs
new file mode 100644
index 000000000..431999102
--- /dev/null
+++ b/tests/run-coverage/generator.rs
@@ -0,0 +1,30 @@
+#![feature(generators, generator_trait)]
+
+use std::ops::{Generator, GeneratorState};
+use std::pin::Pin;
+
+// The following implementation of a function called from a `yield` statement
+// (apparently requiring the Result and the `String` type or constructor)
+// creates conditions where the `generator::StateTransform` MIR transform will
+// drop all `Counter` `Coverage` statements from a MIR. `simplify.rs` has logic
+// to handle this condition, and still report dead block coverage.
+fn get_u32(val: bool) -> Result<u32, String> {
+ if val { Ok(1) } else { Err(String::from("some error")) }
+}
+
+fn main() {
+ let is_true = std::env::args().len() == 1;
+ let mut generator = || {
+ yield get_u32(is_true);
+ return "foo";
+ };
+
+ match Pin::new(&mut generator).resume(()) {
+ GeneratorState::Yielded(Ok(1)) => {}
+ _ => panic!("unexpected return from resume"),
+ }
+ match Pin::new(&mut generator).resume(()) {
+ GeneratorState::Complete("foo") => {}
+ _ => panic!("unexpected return from resume"),
+ }
+}
diff --git a/tests/run-coverage/generics.coverage b/tests/run-coverage/generics.coverage
new file mode 100644
index 000000000..7a7649674
--- /dev/null
+++ b/tests/run-coverage/generics.coverage
@@ -0,0 +1,71 @@
+ 1| |#![allow(unused_assignments)]
+ 2| |// failure-status: 1
+ 3| |
+ 4| |struct Firework<T> where T: Copy + std::fmt::Display {
+ 5| | strength: T,
+ 6| |}
+ 7| |
+ 8| |impl<T> Firework<T> where T: Copy + std::fmt::Display {
+ 9| | #[inline(always)]
+ 10| 3| fn set_strength(&mut self, new_strength: T) {
+ 11| 3| self.strength = new_strength;
+ 12| 3| }
+ ------------------
+ | <generics::Firework<f64>>::set_strength:
+ | 10| 2| fn set_strength(&mut self, new_strength: T) {
+ | 11| 2| self.strength = new_strength;
+ | 12| 2| }
+ ------------------
+ | <generics::Firework<i32>>::set_strength:
+ | 10| 1| fn set_strength(&mut self, new_strength: T) {
+ | 11| 1| self.strength = new_strength;
+ | 12| 1| }
+ ------------------
+ 13| |}
+ 14| |
+ 15| |impl<T> Drop for Firework<T> where T: Copy + std::fmt::Display {
+ 16| | #[inline(always)]
+ 17| 2| fn drop(&mut self) {
+ 18| 2| println!("BOOM times {}!!!", self.strength);
+ 19| 2| }
+ ------------------
+ | <generics::Firework<f64> as core::ops::drop::Drop>::drop:
+ | 17| 1| fn drop(&mut self) {
+ | 18| 1| println!("BOOM times {}!!!", self.strength);
+ | 19| 1| }
+ ------------------
+ | <generics::Firework<i32> as core::ops::drop::Drop>::drop:
+ | 17| 1| fn drop(&mut self) {
+ | 18| 1| println!("BOOM times {}!!!", self.strength);
+ | 19| 1| }
+ ------------------
+ 20| |}
+ 21| |
+ 22| 1|fn main() -> Result<(),u8> {
+ 23| 1| let mut firecracker = Firework { strength: 1 };
+ 24| 1| firecracker.set_strength(2);
+ 25| 1|
+ 26| 1| let mut tnt = Firework { strength: 100.1 };
+ 27| 1| tnt.set_strength(200.1);
+ 28| 1| tnt.set_strength(300.3);
+ 29| 1|
+ 30| 1| if true {
+ 31| 1| println!("Exiting with error...");
+ 32| 1| return Err(1);
+ 33| 0| }
+ 34| 0|
+ 35| 0|
+ 36| 0|
+ 37| 0|
+ 38| 0|
+ 39| 0| let _ = Firework { strength: 1000 };
+ 40| 0|
+ 41| 0| Ok(())
+ 42| 1|}
+ 43| |
+ 44| |// Expected program output:
+ 45| |// Exiting with error...
+ 46| |// BOOM times 100!!!
+ 47| |// BOOM times 1!!!
+ 48| |// Error: 1
+
diff --git a/tests/run-coverage/generics.rs b/tests/run-coverage/generics.rs
new file mode 100644
index 000000000..150ffb9db
--- /dev/null
+++ b/tests/run-coverage/generics.rs
@@ -0,0 +1,48 @@
+#![allow(unused_assignments)]
+// failure-status: 1
+
+struct Firework<T> where T: Copy + std::fmt::Display {
+ strength: T,
+}
+
+impl<T> Firework<T> where T: Copy + std::fmt::Display {
+ #[inline(always)]
+ fn set_strength(&mut self, new_strength: T) {
+ self.strength = new_strength;
+ }
+}
+
+impl<T> Drop for Firework<T> where T: Copy + std::fmt::Display {
+ #[inline(always)]
+ fn drop(&mut self) {
+ println!("BOOM times {}!!!", self.strength);
+ }
+}
+
+fn main() -> Result<(),u8> {
+ let mut firecracker = Firework { strength: 1 };
+ firecracker.set_strength(2);
+
+ let mut tnt = Firework { strength: 100.1 };
+ tnt.set_strength(200.1);
+ tnt.set_strength(300.3);
+
+ if true {
+ println!("Exiting with error...");
+ return Err(1);
+ }
+
+
+
+
+
+ let _ = Firework { strength: 1000 };
+
+ Ok(())
+}
+
+// Expected program output:
+// Exiting with error...
+// BOOM times 100!!!
+// BOOM times 1!!!
+// Error: 1
diff --git a/tests/run-coverage/if.coverage b/tests/run-coverage/if.coverage
new file mode 100644
index 000000000..0c9eff227
--- /dev/null
+++ b/tests/run-coverage/if.coverage
@@ -0,0 +1,30 @@
+ 1| |#![allow(unused_assignments, unused_variables)]
+ 2| |
+ 3| 1|fn main() {
+ 4| 1| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 5| 1| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 6| 1| // dependent conditions.
+ 7| 1| let
+ 8| 1| is_true
+ 9| 1| =
+ 10| 1| std::env::args().len()
+ 11| 1| ==
+ 12| 1| 1
+ 13| 1| ;
+ 14| 1| let
+ 15| 1| mut
+ 16| 1| countdown
+ 17| 1| =
+ 18| 1| 0
+ 19| 1| ;
+ 20| 1| if
+ 21| 1| is_true
+ 22| 1| {
+ 23| 1| countdown
+ 24| 1| =
+ 25| 1| 10
+ 26| 1| ;
+ 27| 1| }
+ ^0
+ 28| 1|}
+
diff --git a/tests/run-coverage/if.rs b/tests/run-coverage/if.rs
new file mode 100644
index 000000000..8ad5042ff
--- /dev/null
+++ b/tests/run-coverage/if.rs
@@ -0,0 +1,28 @@
+#![allow(unused_assignments, unused_variables)]
+
+fn main() {
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let
+ is_true
+ =
+ std::env::args().len()
+ ==
+ 1
+ ;
+ let
+ mut
+ countdown
+ =
+ 0
+ ;
+ if
+ is_true
+ {
+ countdown
+ =
+ 10
+ ;
+ }
+}
diff --git a/tests/run-coverage/if_else.coverage b/tests/run-coverage/if_else.coverage
new file mode 100644
index 000000000..4285d3186
--- /dev/null
+++ b/tests/run-coverage/if_else.coverage
@@ -0,0 +1,41 @@
+ 1| |#![allow(unused_assignments, unused_variables)]
+ 2| |
+ 3| 1|fn main() {
+ 4| 1| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 5| 1| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 6| 1| // dependent conditions.
+ 7| 1| let is_true = std::env::args().len() == 1;
+ 8| 1|
+ 9| 1| let mut countdown = 0;
+ 10| 1| if
+ 11| 1| is_true
+ 12| 1| {
+ 13| 1| countdown
+ 14| 1| =
+ 15| 1| 10
+ 16| 1| ;
+ 17| 1| }
+ 18| | else // Note coverage region difference without semicolon
+ 19| | {
+ 20| 0| countdown
+ 21| 0| =
+ 22| 0| 100
+ 23| | }
+ 24| |
+ 25| | if
+ 26| 1| is_true
+ 27| 1| {
+ 28| 1| countdown
+ 29| 1| =
+ 30| 1| 10
+ 31| 1| ;
+ 32| 1| }
+ 33| | else
+ 34| 0| {
+ 35| 0| countdown
+ 36| 0| =
+ 37| 0| 100
+ 38| 0| ;
+ 39| 0| }
+ 40| 1|}
+
diff --git a/tests/run-coverage/if_else.rs b/tests/run-coverage/if_else.rs
new file mode 100644
index 000000000..3244e1e3a
--- /dev/null
+++ b/tests/run-coverage/if_else.rs
@@ -0,0 +1,40 @@
+#![allow(unused_assignments, unused_variables)]
+
+fn main() {
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let is_true = std::env::args().len() == 1;
+
+ let mut countdown = 0;
+ if
+ is_true
+ {
+ countdown
+ =
+ 10
+ ;
+ }
+ else // Note coverage region difference without semicolon
+ {
+ countdown
+ =
+ 100
+ }
+
+ if
+ is_true
+ {
+ countdown
+ =
+ 10
+ ;
+ }
+ else
+ {
+ countdown
+ =
+ 100
+ ;
+ }
+}
diff --git a/tests/run-coverage/inline-dead.coverage b/tests/run-coverage/inline-dead.coverage
new file mode 100644
index 000000000..a59fe1146
--- /dev/null
+++ b/tests/run-coverage/inline-dead.coverage
@@ -0,0 +1,28 @@
+ 1| |// Regression test for issue #98833.
+ 2| |// compile-flags: -Zinline-mir -Cdebug-assertions=off
+ 3| |
+ 4| 1|fn main() {
+ 5| 1| println!("{}", live::<false>());
+ 6| 1|
+ 7| 1| let f = |x: bool| {
+ 8| | debug_assert!(
+ 9| 0| x
+ 10| | );
+ 11| 1| };
+ 12| 1| f(false);
+ 13| 1|}
+ 14| |
+ 15| |#[inline]
+ 16| 1|fn live<const B: bool>() -> u32 {
+ 17| 1| if B {
+ 18| 0| dead()
+ 19| | } else {
+ 20| 1| 0
+ 21| | }
+ 22| 1|}
+ 23| |
+ 24| |#[inline]
+ 25| 0|fn dead() -> u32 {
+ 26| 0| 42
+ 27| 0|}
+
diff --git a/tests/run-coverage/inline-dead.rs b/tests/run-coverage/inline-dead.rs
new file mode 100644
index 000000000..854fa0629
--- /dev/null
+++ b/tests/run-coverage/inline-dead.rs
@@ -0,0 +1,27 @@
+// Regression test for issue #98833.
+// compile-flags: -Zinline-mir -Cdebug-assertions=off
+
+fn main() {
+ println!("{}", live::<false>());
+
+ let f = |x: bool| {
+ debug_assert!(
+ x
+ );
+ };
+ f(false);
+}
+
+#[inline]
+fn live<const B: bool>() -> u32 {
+ if B {
+ dead()
+ } else {
+ 0
+ }
+}
+
+#[inline]
+fn dead() -> u32 {
+ 42
+}
diff --git a/tests/run-coverage/inline.coverage b/tests/run-coverage/inline.coverage
new file mode 100644
index 000000000..6f5d1544f
--- /dev/null
+++ b/tests/run-coverage/inline.coverage
@@ -0,0 +1,54 @@
+ 1| |// compile-flags: -Zinline-mir
+ 2| |
+ 3| |use std::fmt::Display;
+ 4| |
+ 5| 1|fn main() {
+ 6| 1| permutations(&['a', 'b', 'c']);
+ 7| 1|}
+ 8| |
+ 9| |#[inline(always)]
+ 10| 1|fn permutations<T: Copy + Display>(xs: &[T]) {
+ 11| 1| let mut ys = xs.to_owned();
+ 12| 1| permutate(&mut ys, 0);
+ 13| 1|}
+ 14| |
+ 15| 16|fn permutate<T: Copy + Display>(xs: &mut [T], k: usize) {
+ 16| 16| let n = length(xs);
+ 17| 16| if k == n {
+ 18| 6| display(xs);
+ 19| 10| } else if k < n {
+ 20| 15| for i in k..n {
+ ^10
+ 21| 15| swap(xs, i, k);
+ 22| 15| permutate(xs, k + 1);
+ 23| 15| swap(xs, i, k);
+ 24| 15| }
+ 25| 0| } else {
+ 26| 0| error();
+ 27| 0| }
+ 28| 16|}
+ 29| |
+ 30| 16|fn length<T>(xs: &[T]) -> usize {
+ 31| 16| xs.len()
+ 32| 16|}
+ 33| |
+ 34| |#[inline]
+ 35| 30|fn swap<T: Copy>(xs: &mut [T], i: usize, j: usize) {
+ 36| 30| let t = xs[i];
+ 37| 30| xs[i] = xs[j];
+ 38| 30| xs[j] = t;
+ 39| 30|}
+ 40| |
+ 41| 6|fn display<T: Display>(xs: &[T]) {
+ 42| 24| for x in xs {
+ ^18
+ 43| 18| print!("{}", x);
+ 44| 18| }
+ 45| 6| println!();
+ 46| 6|}
+ 47| |
+ 48| |#[inline(always)]
+ 49| 0|fn error() {
+ 50| 0| panic!("error");
+ 51| 0|}
+
diff --git a/tests/run-coverage/inline.rs b/tests/run-coverage/inline.rs
new file mode 100644
index 000000000..9cfab9ddb
--- /dev/null
+++ b/tests/run-coverage/inline.rs
@@ -0,0 +1,51 @@
+// compile-flags: -Zinline-mir
+
+use std::fmt::Display;
+
+fn main() {
+ permutations(&['a', 'b', 'c']);
+}
+
+#[inline(always)]
+fn permutations<T: Copy + Display>(xs: &[T]) {
+ let mut ys = xs.to_owned();
+ permutate(&mut ys, 0);
+}
+
+fn permutate<T: Copy + Display>(xs: &mut [T], k: usize) {
+ let n = length(xs);
+ if k == n {
+ display(xs);
+ } else if k < n {
+ for i in k..n {
+ swap(xs, i, k);
+ permutate(xs, k + 1);
+ swap(xs, i, k);
+ }
+ } else {
+ error();
+ }
+}
+
+fn length<T>(xs: &[T]) -> usize {
+ xs.len()
+}
+
+#[inline]
+fn swap<T: Copy>(xs: &mut [T], i: usize, j: usize) {
+ let t = xs[i];
+ xs[i] = xs[j];
+ xs[j] = t;
+}
+
+fn display<T: Display>(xs: &[T]) {
+ for x in xs {
+ print!("{}", x);
+ }
+ println!();
+}
+
+#[inline(always)]
+fn error() {
+ panic!("error");
+}
diff --git a/tests/run-coverage/inner_items.coverage b/tests/run-coverage/inner_items.coverage
new file mode 100644
index 000000000..883254a09
--- /dev/null
+++ b/tests/run-coverage/inner_items.coverage
@@ -0,0 +1,60 @@
+ 1| |#![allow(unused_assignments, unused_variables, dead_code)]
+ 2| |
+ 3| 1|fn main() {
+ 4| 1| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 5| 1| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 6| 1| // dependent conditions.
+ 7| 1| let is_true = std::env::args().len() == 1;
+ 8| 1|
+ 9| 1| let mut countdown = 0;
+ 10| 1| if is_true {
+ 11| 1| countdown = 10;
+ 12| 1| }
+ ^0
+ 13| |
+ 14| | mod in_mod {
+ 15| | const IN_MOD_CONST: u32 = 1000;
+ 16| | }
+ 17| |
+ 18| 3| fn in_func(a: u32) {
+ 19| 3| let b = 1;
+ 20| 3| let c = a + b;
+ 21| 3| println!("c = {}", c)
+ 22| 3| }
+ 23| |
+ 24| | struct InStruct {
+ 25| | in_struct_field: u32,
+ 26| | }
+ 27| |
+ 28| | const IN_CONST: u32 = 1234;
+ 29| |
+ 30| | trait InTrait {
+ 31| | fn trait_func(&mut self, incr: u32);
+ 32| |
+ 33| 1| fn default_trait_func(&mut self) {
+ 34| 1| in_func(IN_CONST);
+ 35| 1| self.trait_func(IN_CONST);
+ 36| 1| }
+ 37| | }
+ 38| |
+ 39| | impl InTrait for InStruct {
+ 40| 1| fn trait_func(&mut self, incr: u32) {
+ 41| 1| self.in_struct_field += incr;
+ 42| 1| in_func(self.in_struct_field);
+ 43| 1| }
+ 44| | }
+ 45| |
+ 46| | type InType = String;
+ 47| |
+ 48| 1| if is_true {
+ 49| 1| in_func(countdown);
+ 50| 1| }
+ ^0
+ 51| |
+ 52| 1| let mut val = InStruct {
+ 53| 1| in_struct_field: 101,
+ 54| 1| };
+ 55| 1|
+ 56| 1| val.default_trait_func();
+ 57| 1|}
+
diff --git a/tests/run-coverage/inner_items.rs b/tests/run-coverage/inner_items.rs
new file mode 100644
index 000000000..bcb62b303
--- /dev/null
+++ b/tests/run-coverage/inner_items.rs
@@ -0,0 +1,57 @@
+#![allow(unused_assignments, unused_variables, dead_code)]
+
+fn main() {
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let is_true = std::env::args().len() == 1;
+
+ let mut countdown = 0;
+ if is_true {
+ countdown = 10;
+ }
+
+ mod in_mod {
+ const IN_MOD_CONST: u32 = 1000;
+ }
+
+ fn in_func(a: u32) {
+ let b = 1;
+ let c = a + b;
+ println!("c = {}", c)
+ }
+
+ struct InStruct {
+ in_struct_field: u32,
+ }
+
+ const IN_CONST: u32 = 1234;
+
+ trait InTrait {
+ fn trait_func(&mut self, incr: u32);
+
+ fn default_trait_func(&mut self) {
+ in_func(IN_CONST);
+ self.trait_func(IN_CONST);
+ }
+ }
+
+ impl InTrait for InStruct {
+ fn trait_func(&mut self, incr: u32) {
+ self.in_struct_field += incr;
+ in_func(self.in_struct_field);
+ }
+ }
+
+ type InType = String;
+
+ if is_true {
+ in_func(countdown);
+ }
+
+ let mut val = InStruct {
+ in_struct_field: 101,
+ };
+
+ val.default_trait_func();
+}
diff --git a/tests/run-coverage/issue-83601.coverage b/tests/run-coverage/issue-83601.coverage
new file mode 100644
index 000000000..25c74ab2e
--- /dev/null
+++ b/tests/run-coverage/issue-83601.coverage
@@ -0,0 +1,16 @@
+ 1| |// Shows that rust-lang/rust/83601 is resolved
+ 2| |
+ 3| 3|#[derive(Debug, PartialEq, Eq)]
+ ^2
+ 4| |struct Foo(u32);
+ 5| |
+ 6| 1|fn main() {
+ 7| 1| let bar = Foo(1);
+ 8| 1| assert_eq!(bar, Foo(1));
+ 9| 1| let baz = Foo(0);
+ 10| 1| assert_ne!(baz, Foo(1));
+ 11| 1| println!("{:?}", Foo(1));
+ 12| 1| println!("{:?}", bar);
+ 13| 1| println!("{:?}", baz);
+ 14| 1|}
+
diff --git a/tests/run-coverage/issue-83601.rs b/tests/run-coverage/issue-83601.rs
new file mode 100644
index 000000000..0b72a8194
--- /dev/null
+++ b/tests/run-coverage/issue-83601.rs
@@ -0,0 +1,14 @@
+// Shows that rust-lang/rust/83601 is resolved
+
+#[derive(Debug, PartialEq, Eq)]
+struct Foo(u32);
+
+fn main() {
+ let bar = Foo(1);
+ assert_eq!(bar, Foo(1));
+ let baz = Foo(0);
+ assert_ne!(baz, Foo(1));
+ println!("{:?}", Foo(1));
+ println!("{:?}", bar);
+ println!("{:?}", baz);
+}
diff --git a/tests/run-coverage/issue-84561.coverage b/tests/run-coverage/issue-84561.coverage
new file mode 100644
index 000000000..7a97e3532
--- /dev/null
+++ b/tests/run-coverage/issue-84561.coverage
@@ -0,0 +1,189 @@
+ 1| |// This demonstrated Issue #84561: function-like macros produce unintuitive coverage results.
+ 2| |
+ 3| |// failure-status: 101
+ 4| 21|#[derive(PartialEq, Eq)]
+ 5| |struct Foo(u32);
+ 6| 1|fn test3() {
+ 7| 1| let is_true = std::env::args().len() == 1;
+ 8| 1| let bar = Foo(1);
+ 9| 1| assert_eq!(bar, Foo(1));
+ 10| 1| let baz = Foo(0);
+ 11| 1| assert_ne!(baz, Foo(1));
+ 12| 1| println!("{:?}", Foo(1));
+ 13| 1| println!("{:?}", bar);
+ 14| 1| println!("{:?}", baz);
+ 15| 1|
+ 16| 1| assert_eq!(Foo(1), Foo(1));
+ 17| 1| assert_ne!(Foo(0), Foo(1));
+ 18| 1| assert_eq!(Foo(2), Foo(2));
+ 19| 1| let bar = Foo(0);
+ 20| 1| assert_ne!(bar, Foo(3));
+ 21| 1| assert_ne!(Foo(0), Foo(4));
+ 22| 1| assert_eq!(Foo(3), Foo(3), "with a message");
+ ^0
+ 23| 1| println!("{:?}", bar);
+ 24| 1| println!("{:?}", Foo(1));
+ 25| 1|
+ 26| 1| assert_ne!(Foo(0), Foo(5), "{}", if is_true { "true message" } else { "false message" });
+ ^0 ^0 ^0
+ 27| 1| assert_ne!(
+ 28| | Foo(0)
+ 29| | ,
+ 30| | Foo(5)
+ 31| | ,
+ 32| 0| "{}"
+ 33| 0| ,
+ 34| 0| if
+ 35| 0| is_true
+ 36| | {
+ 37| 0| "true message"
+ 38| | } else {
+ 39| 0| "false message"
+ 40| | }
+ 41| | );
+ 42| |
+ 43| 1| let is_true = std::env::args().len() == 1;
+ 44| 1|
+ 45| 1| assert_eq!(
+ 46| 1| Foo(1),
+ 47| 1| Foo(1)
+ 48| 1| );
+ 49| 1| assert_ne!(
+ 50| 1| Foo(0),
+ 51| 1| Foo(1)
+ 52| 1| );
+ 53| 1| assert_eq!(
+ 54| 1| Foo(2),
+ 55| 1| Foo(2)
+ 56| 1| );
+ 57| 1| let bar = Foo(1);
+ 58| 1| assert_ne!(
+ 59| 1| bar,
+ 60| 1| Foo(3)
+ 61| 1| );
+ 62| 1| if is_true {
+ 63| 1| assert_ne!(
+ 64| 1| Foo(0),
+ 65| 1| Foo(4)
+ 66| 1| );
+ 67| | } else {
+ 68| 0| assert_eq!(
+ 69| 0| Foo(3),
+ 70| 0| Foo(3)
+ 71| 0| );
+ 72| | }
+ 73| 1| if is_true {
+ 74| 1| assert_ne!(
+ 75| | Foo(0),
+ 76| | Foo(4),
+ 77| 0| "with a message"
+ 78| | );
+ 79| | } else {
+ 80| 0| assert_eq!(
+ 81| | Foo(3),
+ 82| | Foo(3),
+ 83| 0| "with a message"
+ 84| | );
+ 85| | }
+ 86| 1| assert_ne!(
+ 87| 1| if is_true {
+ 88| 1| Foo(0)
+ 89| | } else {
+ 90| 0| Foo(1)
+ 91| | },
+ 92| | Foo(5)
+ 93| | );
+ 94| 1| assert_ne!(
+ 95| 1| Foo(5),
+ 96| 1| if is_true {
+ 97| 1| Foo(0)
+ 98| | } else {
+ 99| 0| Foo(1)
+ 100| | }
+ 101| | );
+ 102| 1| assert_ne!(
+ 103| 1| if is_true {
+ 104| 1| assert_eq!(
+ 105| 1| Foo(3),
+ 106| 1| Foo(3)
+ 107| 1| );
+ 108| 1| Foo(0)
+ 109| | } else {
+ 110| 0| assert_ne!(
+ 111| 0| if is_true {
+ 112| 0| Foo(0)
+ 113| | } else {
+ 114| 0| Foo(1)
+ 115| | },
+ 116| | Foo(5)
+ 117| | );
+ 118| 0| Foo(1)
+ 119| | },
+ 120| | Foo(5),
+ 121| 0| "with a message"
+ 122| | );
+ 123| 1| assert_eq!(
+ 124| | Foo(1),
+ 125| | Foo(3),
+ 126| 1| "this assert should fail"
+ 127| | );
+ 128| 0| assert_eq!(
+ 129| | Foo(3),
+ 130| | Foo(3),
+ 131| 0| "this assert should not be reached"
+ 132| | );
+ 133| 0|}
+ 134| |
+ 135| |impl std::fmt::Debug for Foo {
+ 136| | fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+ 137| 7| write!(f, "try and succeed")?;
+ ^0
+ 138| 7| Ok(())
+ 139| 7| }
+ 140| |}
+ 141| |
+ 142| |static mut DEBUG_LEVEL_ENABLED: bool = false;
+ 143| |
+ 144| |macro_rules! debug {
+ 145| | ($($arg:tt)+) => (
+ 146| | if unsafe { DEBUG_LEVEL_ENABLED } {
+ 147| | println!($($arg)+);
+ 148| | }
+ 149| | );
+ 150| |}
+ 151| |
+ 152| 1|fn test1() {
+ 153| 1| debug!("debug is enabled");
+ ^0
+ 154| 1| debug!("debug is enabled");
+ ^0
+ 155| 1| let _ = 0;
+ 156| 1| debug!("debug is enabled");
+ ^0
+ 157| 1| unsafe {
+ 158| 1| DEBUG_LEVEL_ENABLED = true;
+ 159| 1| }
+ 160| 1| debug!("debug is enabled");
+ 161| 1|}
+ 162| |
+ 163| |macro_rules! call_debug {
+ 164| | ($($arg:tt)+) => (
+ 165| 1| fn call_print(s: &str) {
+ 166| 1| print!("{}", s);
+ 167| 1| }
+ 168| |
+ 169| | call_print("called from call_debug: ");
+ 170| | debug!($($arg)+);
+ 171| | );
+ 172| |}
+ 173| |
+ 174| 1|fn test2() {
+ 175| 1| call_debug!("debug is enabled");
+ 176| 1|}
+ 177| |
+ 178| 1|fn main() {
+ 179| 1| test1();
+ 180| 1| test2();
+ 181| 1| test3();
+ 182| 1|}
+
diff --git a/tests/run-coverage/issue-84561.rs b/tests/run-coverage/issue-84561.rs
new file mode 100644
index 000000000..facf5b5b4
--- /dev/null
+++ b/tests/run-coverage/issue-84561.rs
@@ -0,0 +1,182 @@
+// This demonstrated Issue #84561: function-like macros produce unintuitive coverage results.
+
+// failure-status: 101
+#[derive(PartialEq, Eq)]
+struct Foo(u32);
+fn test3() {
+ let is_true = std::env::args().len() == 1;
+ let bar = Foo(1);
+ assert_eq!(bar, Foo(1));
+ let baz = Foo(0);
+ assert_ne!(baz, Foo(1));
+ println!("{:?}", Foo(1));
+ println!("{:?}", bar);
+ println!("{:?}", baz);
+
+ assert_eq!(Foo(1), Foo(1));
+ assert_ne!(Foo(0), Foo(1));
+ assert_eq!(Foo(2), Foo(2));
+ let bar = Foo(0);
+ assert_ne!(bar, Foo(3));
+ assert_ne!(Foo(0), Foo(4));
+ assert_eq!(Foo(3), Foo(3), "with a message");
+ println!("{:?}", bar);
+ println!("{:?}", Foo(1));
+
+ assert_ne!(Foo(0), Foo(5), "{}", if is_true { "true message" } else { "false message" });
+ assert_ne!(
+ Foo(0)
+ ,
+ Foo(5)
+ ,
+ "{}"
+ ,
+ if
+ is_true
+ {
+ "true message"
+ } else {
+ "false message"
+ }
+ );
+
+ let is_true = std::env::args().len() == 1;
+
+ assert_eq!(
+ Foo(1),
+ Foo(1)
+ );
+ assert_ne!(
+ Foo(0),
+ Foo(1)
+ );
+ assert_eq!(
+ Foo(2),
+ Foo(2)
+ );
+ let bar = Foo(1);
+ assert_ne!(
+ bar,
+ Foo(3)
+ );
+ if is_true {
+ assert_ne!(
+ Foo(0),
+ Foo(4)
+ );
+ } else {
+ assert_eq!(
+ Foo(3),
+ Foo(3)
+ );
+ }
+ if is_true {
+ assert_ne!(
+ Foo(0),
+ Foo(4),
+ "with a message"
+ );
+ } else {
+ assert_eq!(
+ Foo(3),
+ Foo(3),
+ "with a message"
+ );
+ }
+ assert_ne!(
+ if is_true {
+ Foo(0)
+ } else {
+ Foo(1)
+ },
+ Foo(5)
+ );
+ assert_ne!(
+ Foo(5),
+ if is_true {
+ Foo(0)
+ } else {
+ Foo(1)
+ }
+ );
+ assert_ne!(
+ if is_true {
+ assert_eq!(
+ Foo(3),
+ Foo(3)
+ );
+ Foo(0)
+ } else {
+ assert_ne!(
+ if is_true {
+ Foo(0)
+ } else {
+ Foo(1)
+ },
+ Foo(5)
+ );
+ Foo(1)
+ },
+ Foo(5),
+ "with a message"
+ );
+ assert_eq!(
+ Foo(1),
+ Foo(3),
+ "this assert should fail"
+ );
+ assert_eq!(
+ Foo(3),
+ Foo(3),
+ "this assert should not be reached"
+ );
+}
+
+impl std::fmt::Debug for Foo {
+ fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+ write!(f, "try and succeed")?;
+ Ok(())
+ }
+}
+
+static mut DEBUG_LEVEL_ENABLED: bool = false;
+
+macro_rules! debug {
+ ($($arg:tt)+) => (
+ if unsafe { DEBUG_LEVEL_ENABLED } {
+ println!($($arg)+);
+ }
+ );
+}
+
+fn test1() {
+ debug!("debug is enabled");
+ debug!("debug is enabled");
+ let _ = 0;
+ debug!("debug is enabled");
+ unsafe {
+ DEBUG_LEVEL_ENABLED = true;
+ }
+ debug!("debug is enabled");
+}
+
+macro_rules! call_debug {
+ ($($arg:tt)+) => (
+ fn call_print(s: &str) {
+ print!("{}", s);
+ }
+
+ call_print("called from call_debug: ");
+ debug!($($arg)+);
+ );
+}
+
+fn test2() {
+ call_debug!("debug is enabled");
+}
+
+fn main() {
+ test1();
+ test2();
+ test3();
+}
diff --git a/tests/run-coverage/issue-85461.coverage b/tests/run-coverage/issue-85461.coverage
new file mode 100644
index 000000000..d78a4a112
--- /dev/null
+++ b/tests/run-coverage/issue-85461.coverage
@@ -0,0 +1,36 @@
+$DIR/auxiliary/inline_always_with_dead_code.rs:
+ 1| |// compile-flags: -Cinstrument-coverage -Ccodegen-units=4 -Copt-level=0
+ 2| |
+ 3| |#![allow(dead_code)]
+ 4| |
+ 5| |mod foo {
+ 6| | #[inline(always)]
+ 7| 2| pub fn called() { }
+ 8| |
+ 9| 0| fn uncalled() { }
+ 10| |}
+ 11| |
+ 12| |pub mod bar {
+ 13| 1| pub fn call_me() {
+ 14| 1| super::foo::called();
+ 15| 1| }
+ 16| |}
+ 17| |
+ 18| |pub mod baz {
+ 19| 1| pub fn call_me() {
+ 20| 1| super::foo::called();
+ 21| 1| }
+ 22| |}
+
+$DIR/issue-85461.rs:
+ 1| |// Regression test for #85461: MSVC sometimes fail to link with dead code and #[inline(always)]
+ 2| |// aux-build:inline_always_with_dead_code.rs
+ 3| |extern crate inline_always_with_dead_code;
+ 4| |
+ 5| |use inline_always_with_dead_code::{bar, baz};
+ 6| |
+ 7| 1|fn main() {
+ 8| 1| bar::call_me();
+ 9| 1| baz::call_me();
+ 10| 1|}
+
diff --git a/tests/run-coverage/issue-85461.rs b/tests/run-coverage/issue-85461.rs
new file mode 100644
index 000000000..6f626b4a6
--- /dev/null
+++ b/tests/run-coverage/issue-85461.rs
@@ -0,0 +1,10 @@
+// Regression test for #85461: MSVC sometimes fail to link with dead code and #[inline(always)]
+// aux-build:inline_always_with_dead_code.rs
+extern crate inline_always_with_dead_code;
+
+use inline_always_with_dead_code::{bar, baz};
+
+fn main() {
+ bar::call_me();
+ baz::call_me();
+}
diff --git a/tests/run-coverage/issue-93054.coverage b/tests/run-coverage/issue-93054.coverage
new file mode 100644
index 000000000..a1655aded
--- /dev/null
+++ b/tests/run-coverage/issue-93054.coverage
@@ -0,0 +1,29 @@
+ 1| |// Regression test for #93054: Functions using uninhabited types often only have a single,
+ 2| |// unreachable basic block which doesn't get instrumented. This should not cause llvm-cov to fail.
+ 3| |// Since these kinds functions can't be invoked anyway, it's ok to not have coverage data for them.
+ 4| |
+ 5| |// compile-flags: --edition=2021
+ 6| |
+ 7| |enum Never { }
+ 8| |
+ 9| |impl Never {
+ 10| | fn foo(self) {
+ 11| | match self { }
+ 12| | make().map(|never| match never { });
+ 13| | }
+ 14| |
+ 15| | fn bar(&self) {
+ 16| | match *self { }
+ 17| | }
+ 18| |}
+ 19| |
+ 20| 0|async fn foo2(never: Never) {
+ 21| | match never { }
+ 22| |}
+ 23| |
+ 24| 0|fn make() -> Option<Never> {
+ 25| 0| None
+ 26| 0|}
+ 27| |
+ 28| 1|fn main() { }
+
diff --git a/tests/run-coverage/issue-93054.rs b/tests/run-coverage/issue-93054.rs
new file mode 100644
index 000000000..c160b3db0
--- /dev/null
+++ b/tests/run-coverage/issue-93054.rs
@@ -0,0 +1,28 @@
+// Regression test for #93054: Functions using uninhabited types often only have a single,
+// unreachable basic block which doesn't get instrumented. This should not cause llvm-cov to fail.
+// Since these kinds functions can't be invoked anyway, it's ok to not have coverage data for them.
+
+// compile-flags: --edition=2021
+
+enum Never { }
+
+impl Never {
+ fn foo(self) {
+ match self { }
+ make().map(|never| match never { });
+ }
+
+ fn bar(&self) {
+ match *self { }
+ }
+}
+
+async fn foo2(never: Never) {
+ match never { }
+}
+
+fn make() -> Option<Never> {
+ None
+}
+
+fn main() { }
diff --git a/tests/run-coverage/lazy_boolean.coverage b/tests/run-coverage/lazy_boolean.coverage
new file mode 100644
index 000000000..bd349df2f
--- /dev/null
+++ b/tests/run-coverage/lazy_boolean.coverage
@@ -0,0 +1,64 @@
+ 1| |#![allow(unused_assignments, unused_variables)]
+ 2| |
+ 3| 1|fn main() {
+ 4| 1| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 5| 1| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 6| 1| // dependent conditions.
+ 7| 1| let is_true = std::env::args().len() == 1;
+ 8| 1|
+ 9| 1| let (mut a, mut b, mut c) = (0, 0, 0);
+ 10| 1| if is_true {
+ 11| 1| a = 1;
+ 12| 1| b = 10;
+ 13| 1| c = 100;
+ 14| 1| }
+ ^0
+ 15| | let
+ 16| 1| somebool
+ 17| | =
+ 18| 1| a < b
+ 19| | ||
+ 20| 0| b < c
+ 21| | ;
+ 22| | let
+ 23| 1| somebool
+ 24| | =
+ 25| 1| b < a
+ 26| | ||
+ 27| 1| b < c
+ 28| | ;
+ 29| 1| let somebool = a < b && b < c;
+ 30| 1| let somebool = b < a && b < c;
+ ^0
+ 31| |
+ 32| | if
+ 33| 1| !
+ 34| 1| is_true
+ 35| 0| {
+ 36| 0| a = 2
+ 37| 0| ;
+ 38| 1| }
+ 39| |
+ 40| | if
+ 41| 1| is_true
+ 42| 1| {
+ 43| 1| b = 30
+ 44| 1| ;
+ 45| 1| }
+ 46| | else
+ 47| 0| {
+ 48| 0| c = 400
+ 49| 0| ;
+ 50| 0| }
+ 51| |
+ 52| 1| if !is_true {
+ 53| 0| a = 2;
+ 54| 1| }
+ 55| |
+ 56| 1| if is_true {
+ 57| 1| b = 30;
+ 58| 1| } else {
+ 59| 0| c = 400;
+ 60| 0| }
+ 61| 1|}
+
diff --git a/tests/run-coverage/lazy_boolean.rs b/tests/run-coverage/lazy_boolean.rs
new file mode 100644
index 000000000..bb6219e85
--- /dev/null
+++ b/tests/run-coverage/lazy_boolean.rs
@@ -0,0 +1,61 @@
+#![allow(unused_assignments, unused_variables)]
+
+fn main() {
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let is_true = std::env::args().len() == 1;
+
+ let (mut a, mut b, mut c) = (0, 0, 0);
+ if is_true {
+ a = 1;
+ b = 10;
+ c = 100;
+ }
+ let
+ somebool
+ =
+ a < b
+ ||
+ b < c
+ ;
+ let
+ somebool
+ =
+ b < a
+ ||
+ b < c
+ ;
+ let somebool = a < b && b < c;
+ let somebool = b < a && b < c;
+
+ if
+ !
+ is_true
+ {
+ a = 2
+ ;
+ }
+
+ if
+ is_true
+ {
+ b = 30
+ ;
+ }
+ else
+ {
+ c = 400
+ ;
+ }
+
+ if !is_true {
+ a = 2;
+ }
+
+ if is_true {
+ b = 30;
+ } else {
+ c = 400;
+ }
+}
diff --git a/tests/run-coverage/loop_break_value.coverage b/tests/run-coverage/loop_break_value.coverage
new file mode 100644
index 000000000..022fe4c59
--- /dev/null
+++ b/tests/run-coverage/loop_break_value.coverage
@@ -0,0 +1,14 @@
+ 1| |#![allow(unused_assignments, unused_variables)]
+ 2| |
+ 3| 1|fn main() {
+ 4| 1| let result
+ 5| 1| =
+ 6| 1| loop
+ 7| 1| {
+ 8| 1| break
+ 9| 1| 10
+ 10| 1| ;
+ 11| 1| }
+ 12| 1| ;
+ 13| 1|}
+
diff --git a/tests/run-coverage/loop_break_value.rs b/tests/run-coverage/loop_break_value.rs
new file mode 100644
index 000000000..dbc4fad7a
--- /dev/null
+++ b/tests/run-coverage/loop_break_value.rs
@@ -0,0 +1,13 @@
+#![allow(unused_assignments, unused_variables)]
+
+fn main() {
+ let result
+ =
+ loop
+ {
+ break
+ 10
+ ;
+ }
+ ;
+}
diff --git a/tests/run-coverage/loops_branches.coverage b/tests/run-coverage/loops_branches.coverage
new file mode 100644
index 000000000..b7ad79a24
--- /dev/null
+++ b/tests/run-coverage/loops_branches.coverage
@@ -0,0 +1,68 @@
+ 1| |#![allow(unused_assignments, unused_variables, while_true)]
+ 2| |
+ 3| |// This test confirms that (1) unexecuted infinite loops are handled correctly by the
+ 4| |// InstrumentCoverage MIR pass; and (2) Counter Expressions that subtract from zero can be dropped.
+ 5| |
+ 6| |struct DebugTest;
+ 7| |
+ 8| |impl std::fmt::Debug for DebugTest {
+ 9| 1| fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+ 10| 1| if true {
+ 11| 1| if false {
+ 12| 0| while true {
+ 13| 0| }
+ 14| 1| }
+ 15| 1| write!(f, "cool")?;
+ ^0
+ 16| 0| } else {
+ 17| 0| }
+ 18| |
+ 19| 11| for i in 0..10 {
+ ^10
+ 20| 10| if true {
+ 21| 10| if false {
+ 22| 0| while true {}
+ 23| 10| }
+ 24| 10| write!(f, "cool")?;
+ ^0
+ 25| 0| } else {
+ 26| 0| }
+ 27| | }
+ 28| 1| Ok(())
+ 29| 1| }
+ 30| |}
+ 31| |
+ 32| |struct DisplayTest;
+ 33| |
+ 34| |impl std::fmt::Display for DisplayTest {
+ 35| 1| fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+ 36| 1| if false {
+ 37| 0| } else {
+ 38| 1| if false {
+ 39| 0| while true {}
+ 40| 1| }
+ 41| 1| write!(f, "cool")?;
+ ^0
+ 42| | }
+ 43| 11| for i in 0..10 {
+ ^10
+ 44| 10| if false {
+ 45| 0| } else {
+ 46| 10| if false {
+ 47| 0| while true {}
+ 48| 10| }
+ 49| 10| write!(f, "cool")?;
+ ^0
+ 50| | }
+ 51| | }
+ 52| 1| Ok(())
+ 53| 1| }
+ 54| |}
+ 55| |
+ 56| 1|fn main() {
+ 57| 1| let debug_test = DebugTest;
+ 58| 1| println!("{:?}", debug_test);
+ 59| 1| let display_test = DisplayTest;
+ 60| 1| println!("{}", display_test);
+ 61| 1|}
+
diff --git a/tests/run-coverage/loops_branches.rs b/tests/run-coverage/loops_branches.rs
new file mode 100644
index 000000000..7116ce47f
--- /dev/null
+++ b/tests/run-coverage/loops_branches.rs
@@ -0,0 +1,61 @@
+#![allow(unused_assignments, unused_variables, while_true)]
+
+// This test confirms that (1) unexecuted infinite loops are handled correctly by the
+// InstrumentCoverage MIR pass; and (2) Counter Expressions that subtract from zero can be dropped.
+
+struct DebugTest;
+
+impl std::fmt::Debug for DebugTest {
+ fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+ if true {
+ if false {
+ while true {
+ }
+ }
+ write!(f, "cool")?;
+ } else {
+ }
+
+ for i in 0..10 {
+ if true {
+ if false {
+ while true {}
+ }
+ write!(f, "cool")?;
+ } else {
+ }
+ }
+ Ok(())
+ }
+}
+
+struct DisplayTest;
+
+impl std::fmt::Display for DisplayTest {
+ fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+ if false {
+ } else {
+ if false {
+ while true {}
+ }
+ write!(f, "cool")?;
+ }
+ for i in 0..10 {
+ if false {
+ } else {
+ if false {
+ while true {}
+ }
+ write!(f, "cool")?;
+ }
+ }
+ Ok(())
+ }
+}
+
+fn main() {
+ let debug_test = DebugTest;
+ println!("{:?}", debug_test);
+ let display_test = DisplayTest;
+ println!("{}", display_test);
+}
diff --git a/tests/run-coverage/match_or_pattern.coverage b/tests/run-coverage/match_or_pattern.coverage
new file mode 100644
index 000000000..a0fccb24f
--- /dev/null
+++ b/tests/run-coverage/match_or_pattern.coverage
@@ -0,0 +1,50 @@
+ 1| |#![feature(or_patterns)]
+ 2| |
+ 3| 1|fn main() {
+ 4| 1| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 5| 1| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 6| 1| // dependent conditions.
+ 7| 1| let is_true = std::env::args().len() == 1;
+ 8| 1|
+ 9| 1| let mut a: u8 = 0;
+ 10| 1| let mut b: u8 = 0;
+ 11| 1| if is_true {
+ 12| 1| a = 2;
+ 13| 1| b = 0;
+ 14| 1| }
+ ^0
+ 15| 1| match (a, b) {
+ 16| | // Or patterns generate MIR `SwitchInt` with multiple targets to the same `BasicBlock`.
+ 17| | // This test confirms a fix for Issue #79569.
+ 18| 0| (0 | 1, 2 | 3) => {}
+ 19| 1| _ => {}
+ 20| | }
+ 21| 1| if is_true {
+ 22| 1| a = 0;
+ 23| 1| b = 0;
+ 24| 1| }
+ ^0
+ 25| 1| match (a, b) {
+ 26| 0| (0 | 1, 2 | 3) => {}
+ 27| 1| _ => {}
+ 28| | }
+ 29| 1| if is_true {
+ 30| 1| a = 2;
+ 31| 1| b = 2;
+ 32| 1| }
+ ^0
+ 33| 1| match (a, b) {
+ 34| 0| (0 | 1, 2 | 3) => {}
+ 35| 1| _ => {}
+ 36| | }
+ 37| 1| if is_true {
+ 38| 1| a = 0;
+ 39| 1| b = 2;
+ 40| 1| }
+ ^0
+ 41| 1| match (a, b) {
+ 42| 1| (0 | 1, 2 | 3) => {}
+ 43| 0| _ => {}
+ 44| | }
+ 45| 1|}
+
diff --git a/tests/run-coverage/match_or_pattern.rs b/tests/run-coverage/match_or_pattern.rs
new file mode 100644
index 000000000..4c6a8a9b7
--- /dev/null
+++ b/tests/run-coverage/match_or_pattern.rs
@@ -0,0 +1,45 @@
+#![feature(or_patterns)]
+
+fn main() {
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let is_true = std::env::args().len() == 1;
+
+ let mut a: u8 = 0;
+ let mut b: u8 = 0;
+ if is_true {
+ a = 2;
+ b = 0;
+ }
+ match (a, b) {
+ // Or patterns generate MIR `SwitchInt` with multiple targets to the same `BasicBlock`.
+ // This test confirms a fix for Issue #79569.
+ (0 | 1, 2 | 3) => {}
+ _ => {}
+ }
+ if is_true {
+ a = 0;
+ b = 0;
+ }
+ match (a, b) {
+ (0 | 1, 2 | 3) => {}
+ _ => {}
+ }
+ if is_true {
+ a = 2;
+ b = 2;
+ }
+ match (a, b) {
+ (0 | 1, 2 | 3) => {}
+ _ => {}
+ }
+ if is_true {
+ a = 0;
+ b = 2;
+ }
+ match (a, b) {
+ (0 | 1, 2 | 3) => {}
+ _ => {}
+ }
+}
diff --git a/tests/run-coverage/nested_loops.coverage b/tests/run-coverage/nested_loops.coverage
new file mode 100644
index 000000000..0dbd6bcf3
--- /dev/null
+++ b/tests/run-coverage/nested_loops.coverage
@@ -0,0 +1,26 @@
+ 1| 1|fn main() {
+ 2| 1| let is_true = std::env::args().len() == 1;
+ 3| 1| let mut countdown = 10;
+ 4| |
+ 5| 1| 'outer: while countdown > 0 {
+ 6| 1| let mut a = 100;
+ 7| 1| let mut b = 100;
+ 8| 3| for _ in 0..50 {
+ 9| 3| if a < 30 {
+ 10| 0| break;
+ 11| 3| }
+ 12| 3| a -= 5;
+ 13| 3| b -= 5;
+ 14| 3| if b < 90 {
+ 15| 1| a -= 10;
+ 16| 1| if is_true {
+ 17| 1| break 'outer;
+ 18| 0| } else {
+ 19| 0| a -= 2;
+ 20| 0| }
+ 21| 2| }
+ 22| | }
+ 23| 0| countdown -= 1;
+ 24| | }
+ 25| 1|}
+
diff --git a/tests/run-coverage/nested_loops.rs b/tests/run-coverage/nested_loops.rs
new file mode 100644
index 000000000..4c7c78427
--- /dev/null
+++ b/tests/run-coverage/nested_loops.rs
@@ -0,0 +1,25 @@
+fn main() {
+ let is_true = std::env::args().len() == 1;
+ let mut countdown = 10;
+
+ 'outer: while countdown > 0 {
+ let mut a = 100;
+ let mut b = 100;
+ for _ in 0..50 {
+ if a < 30 {
+ break;
+ }
+ a -= 5;
+ b -= 5;
+ if b < 90 {
+ a -= 10;
+ if is_true {
+ break 'outer;
+ } else {
+ a -= 2;
+ }
+ }
+ }
+ countdown -= 1;
+ }
+}
diff --git a/tests/run-coverage/no_cov_crate.coverage b/tests/run-coverage/no_cov_crate.coverage
new file mode 100644
index 000000000..83a920413
--- /dev/null
+++ b/tests/run-coverage/no_cov_crate.coverage
@@ -0,0 +1,87 @@
+ 1| |// Enables `no_coverage` on the entire crate
+ 2| |#![feature(no_coverage)]
+ 3| |
+ 4| |#[no_coverage]
+ 5| |fn do_not_add_coverage_1() {
+ 6| | println!("called but not covered");
+ 7| |}
+ 8| |
+ 9| |fn do_not_add_coverage_2() {
+ 10| | #![no_coverage]
+ 11| | println!("called but not covered");
+ 12| |}
+ 13| |
+ 14| |#[no_coverage]
+ 15| |fn do_not_add_coverage_not_called() {
+ 16| | println!("not called and not covered");
+ 17| |}
+ 18| |
+ 19| 1|fn add_coverage_1() {
+ 20| 1| println!("called and covered");
+ 21| 1|}
+ 22| |
+ 23| 1|fn add_coverage_2() {
+ 24| 1| println!("called and covered");
+ 25| 1|}
+ 26| |
+ 27| 0|fn add_coverage_not_called() {
+ 28| 0| println!("not called but covered");
+ 29| 0|}
+ 30| |
+ 31| |// FIXME: These test-cases illustrate confusing results of nested functions.
+ 32| |// See https://github.com/rust-lang/rust/issues/93319
+ 33| |mod nested_fns {
+ 34| | #[no_coverage]
+ 35| | pub fn outer_not_covered(is_true: bool) {
+ 36| 1| fn inner(is_true: bool) {
+ 37| 1| if is_true {
+ 38| 1| println!("called and covered");
+ 39| 1| } else {
+ 40| 0| println!("absolutely not covered");
+ 41| 0| }
+ 42| 1| }
+ 43| | println!("called but not covered");
+ 44| | inner(is_true);
+ 45| | }
+ 46| |
+ 47| 1| pub fn outer(is_true: bool) {
+ 48| 1| println!("called and covered");
+ 49| 1| inner_not_covered(is_true);
+ 50| 1|
+ 51| 1| #[no_coverage]
+ 52| 1| fn inner_not_covered(is_true: bool) {
+ 53| 1| if is_true {
+ 54| 1| println!("called but not covered");
+ 55| 1| } else {
+ 56| 1| println!("absolutely not covered");
+ 57| 1| }
+ 58| 1| }
+ 59| 1| }
+ 60| |
+ 61| 1| pub fn outer_both_covered(is_true: bool) {
+ 62| 1| println!("called and covered");
+ 63| 1| inner(is_true);
+ 64| 1|
+ 65| 1| fn inner(is_true: bool) {
+ 66| 1| if is_true {
+ 67| 1| println!("called and covered");
+ 68| 1| } else {
+ 69| 0| println!("absolutely not covered");
+ 70| 0| }
+ 71| 1| }
+ 72| 1| }
+ 73| |}
+ 74| |
+ 75| 1|fn main() {
+ 76| 1| let is_true = std::env::args().len() == 1;
+ 77| 1|
+ 78| 1| do_not_add_coverage_1();
+ 79| 1| do_not_add_coverage_2();
+ 80| 1| add_coverage_1();
+ 81| 1| add_coverage_2();
+ 82| 1|
+ 83| 1| nested_fns::outer_not_covered(is_true);
+ 84| 1| nested_fns::outer(is_true);
+ 85| 1| nested_fns::outer_both_covered(is_true);
+ 86| 1|}
+
diff --git a/tests/run-coverage/no_cov_crate.rs b/tests/run-coverage/no_cov_crate.rs
new file mode 100644
index 000000000..0bfbdda2c
--- /dev/null
+++ b/tests/run-coverage/no_cov_crate.rs
@@ -0,0 +1,86 @@
+// Enables `no_coverage` on the entire crate
+#![feature(no_coverage)]
+
+#[no_coverage]
+fn do_not_add_coverage_1() {
+ println!("called but not covered");
+}
+
+fn do_not_add_coverage_2() {
+ #![no_coverage]
+ println!("called but not covered");
+}
+
+#[no_coverage]
+fn do_not_add_coverage_not_called() {
+ println!("not called and not covered");
+}
+
+fn add_coverage_1() {
+ println!("called and covered");
+}
+
+fn add_coverage_2() {
+ println!("called and covered");
+}
+
+fn add_coverage_not_called() {
+ println!("not called but covered");
+}
+
+// FIXME: These test-cases illustrate confusing results of nested functions.
+// See https://github.com/rust-lang/rust/issues/93319
+mod nested_fns {
+ #[no_coverage]
+ pub fn outer_not_covered(is_true: bool) {
+ fn inner(is_true: bool) {
+ if is_true {
+ println!("called and covered");
+ } else {
+ println!("absolutely not covered");
+ }
+ }
+ println!("called but not covered");
+ inner(is_true);
+ }
+
+ pub fn outer(is_true: bool) {
+ println!("called and covered");
+ inner_not_covered(is_true);
+
+ #[no_coverage]
+ fn inner_not_covered(is_true: bool) {
+ if is_true {
+ println!("called but not covered");
+ } else {
+ println!("absolutely not covered");
+ }
+ }
+ }
+
+ pub fn outer_both_covered(is_true: bool) {
+ println!("called and covered");
+ inner(is_true);
+
+ fn inner(is_true: bool) {
+ if is_true {
+ println!("called and covered");
+ } else {
+ println!("absolutely not covered");
+ }
+ }
+ }
+}
+
+fn main() {
+ let is_true = std::env::args().len() == 1;
+
+ do_not_add_coverage_1();
+ do_not_add_coverage_2();
+ add_coverage_1();
+ add_coverage_2();
+
+ nested_fns::outer_not_covered(is_true);
+ nested_fns::outer(is_true);
+ nested_fns::outer_both_covered(is_true);
+}
diff --git a/tests/run-coverage/overflow.coverage b/tests/run-coverage/overflow.coverage
new file mode 100644
index 000000000..950437591
--- /dev/null
+++ b/tests/run-coverage/overflow.coverage
@@ -0,0 +1,64 @@
+ 1| |#![allow(unused_assignments)]
+ 2| |// failure-status: 101
+ 3| |
+ 4| 4|fn might_overflow(to_add: u32) -> u32 {
+ 5| 4| if to_add > 5 {
+ 6| 1| println!("this will probably overflow");
+ 7| 3| }
+ 8| 4| let add_to = u32::MAX - 5;
+ 9| 4| println!("does {} + {} overflow?", add_to, to_add);
+ 10| 4| let result = to_add + add_to;
+ 11| 4| println!("continuing after overflow check");
+ 12| 4| result
+ 13| 4|}
+ 14| |
+ 15| 1|fn main() -> Result<(),u8> {
+ 16| 1| let mut countdown = 10;
+ 17| 11| while countdown > 0 {
+ 18| 11| if countdown == 1 {
+ 19| 1| let result = might_overflow(10);
+ 20| 1| println!("Result: {}", result);
+ 21| 10| } else if countdown < 5 {
+ 22| 3| let result = might_overflow(1);
+ 23| 3| println!("Result: {}", result);
+ 24| 6| }
+ 25| 10| countdown -= 1;
+ 26| | }
+ 27| 0| Ok(())
+ 28| 0|}
+ 29| |
+ 30| |// Notes:
+ 31| |// 1. Compare this program and its coverage results to those of the very similar test `assert.rs`,
+ 32| |// and similar tests `panic_unwind.rs`, abort.rs` and `try_error_result.rs`.
+ 33| |// 2. This test confirms the coverage generated when a program passes or fails a
+ 34| |// compiler-generated `TerminatorKind::Assert` (based on an overflow check, in this case).
+ 35| |// 3. Similar to how the coverage instrumentation handles `TerminatorKind::Call`,
+ 36| |// compiler-generated assertion failures are assumed to be a symptom of a program bug, not
+ 37| |// expected behavior. To simplify the coverage graphs and keep instrumented programs as
+ 38| |// small and fast as possible, `Assert` terminators are assumed to always succeed, and
+ 39| |// therefore are considered "non-branching" terminators. So, an `Assert` terminator does not
+ 40| |// get its own coverage counter.
+ 41| |// 4. After an unhandled panic or failed Assert, coverage results may not always be intuitive.
+ 42| |// In this test, the final count for the statements after the `if` block in `might_overflow()`
+ 43| |// is 4, even though the lines after `to_add + add_to` were executed only 3 times. Depending
+ 44| |// on the MIR graph and the structure of the code, this count could have been 3 (which might
+ 45| |// have been valid for the overflowed add `+`, but should have been 4 for the lines before
+ 46| |// the overflow. The reason for this potential uncertainty is, a `CounterKind` is incremented
+ 47| |// via StatementKind::Counter at the end of the block, but (as in the case in this test),
+ 48| |// a CounterKind::Expression is always evaluated. In this case, the expression was based on
+ 49| |// a `Counter` incremented as part of the evaluation of the `if` expression, which was
+ 50| |// executed, and counted, 4 times, before reaching the overflow add.
+ 51| |
+ 52| |// If the program did not overflow, the coverage for `might_overflow()` would look like this:
+ 53| |//
+ 54| |// 4| |fn might_overflow(to_add: u32) -> u32 {
+ 55| |// 5| 4| if to_add > 5 {
+ 56| |// 6| 0| println!("this will probably overflow");
+ 57| |// 7| 4| }
+ 58| |// 8| 4| let add_to = u32::MAX - 5;
+ 59| |// 9| 4| println!("does {} + {} overflow?", add_to, to_add);
+ 60| |// 10| 4| let result = to_add + add_to;
+ 61| |// 11| 4| println!("continuing after overflow check");
+ 62| |// 12| 4| result
+ 63| |// 13| 4|}
+
diff --git a/tests/run-coverage/overflow.rs b/tests/run-coverage/overflow.rs
new file mode 100644
index 000000000..7df8de6f3
--- /dev/null
+++ b/tests/run-coverage/overflow.rs
@@ -0,0 +1,63 @@
+#![allow(unused_assignments)]
+// failure-status: 101
+
+fn might_overflow(to_add: u32) -> u32 {
+ if to_add > 5 {
+ println!("this will probably overflow");
+ }
+ let add_to = u32::MAX - 5;
+ println!("does {} + {} overflow?", add_to, to_add);
+ let result = to_add + add_to;
+ println!("continuing after overflow check");
+ result
+}
+
+fn main() -> Result<(),u8> {
+ let mut countdown = 10;
+ while countdown > 0 {
+ if countdown == 1 {
+ let result = might_overflow(10);
+ println!("Result: {}", result);
+ } else if countdown < 5 {
+ let result = might_overflow(1);
+ println!("Result: {}", result);
+ }
+ countdown -= 1;
+ }
+ Ok(())
+}
+
+// Notes:
+// 1. Compare this program and its coverage results to those of the very similar test `assert.rs`,
+// and similar tests `panic_unwind.rs`, abort.rs` and `try_error_result.rs`.
+// 2. This test confirms the coverage generated when a program passes or fails a
+// compiler-generated `TerminatorKind::Assert` (based on an overflow check, in this case).
+// 3. Similar to how the coverage instrumentation handles `TerminatorKind::Call`,
+// compiler-generated assertion failures are assumed to be a symptom of a program bug, not
+// expected behavior. To simplify the coverage graphs and keep instrumented programs as
+// small and fast as possible, `Assert` terminators are assumed to always succeed, and
+// therefore are considered "non-branching" terminators. So, an `Assert` terminator does not
+// get its own coverage counter.
+// 4. After an unhandled panic or failed Assert, coverage results may not always be intuitive.
+// In this test, the final count for the statements after the `if` block in `might_overflow()`
+// is 4, even though the lines after `to_add + add_to` were executed only 3 times. Depending
+// on the MIR graph and the structure of the code, this count could have been 3 (which might
+// have been valid for the overflowed add `+`, but should have been 4 for the lines before
+// the overflow. The reason for this potential uncertainty is, a `CounterKind` is incremented
+// via StatementKind::Counter at the end of the block, but (as in the case in this test),
+// a CounterKind::Expression is always evaluated. In this case, the expression was based on
+// a `Counter` incremented as part of the evaluation of the `if` expression, which was
+// executed, and counted, 4 times, before reaching the overflow add.
+
+// If the program did not overflow, the coverage for `might_overflow()` would look like this:
+//
+// 4| |fn might_overflow(to_add: u32) -> u32 {
+// 5| 4| if to_add > 5 {
+// 6| 0| println!("this will probably overflow");
+// 7| 4| }
+// 8| 4| let add_to = u32::MAX - 5;
+// 9| 4| println!("does {} + {} overflow?", add_to, to_add);
+// 10| 4| let result = to_add + add_to;
+// 11| 4| println!("continuing after overflow check");
+// 12| 4| result
+// 13| 4|}
diff --git a/tests/run-coverage/panic_unwind.coverage b/tests/run-coverage/panic_unwind.coverage
new file mode 100644
index 000000000..58b9ba448
--- /dev/null
+++ b/tests/run-coverage/panic_unwind.coverage
@@ -0,0 +1,32 @@
+ 1| |#![allow(unused_assignments)]
+ 2| |// failure-status: 101
+ 3| |
+ 4| 4|fn might_panic(should_panic: bool) {
+ 5| 4| if should_panic {
+ 6| 1| println!("panicking...");
+ 7| 1| panic!("panics");
+ 8| 3| } else {
+ 9| 3| println!("Don't Panic");
+ 10| 3| }
+ 11| 3|}
+ 12| |
+ 13| 1|fn main() -> Result<(), u8> {
+ 14| 1| let mut countdown = 10;
+ 15| 11| while countdown > 0 {
+ 16| 11| if countdown == 1 {
+ 17| 1| might_panic(true);
+ 18| 10| } else if countdown < 5 {
+ 19| 3| might_panic(false);
+ 20| 6| }
+ 21| 10| countdown -= 1;
+ 22| | }
+ 23| 0| Ok(())
+ 24| 0|}
+ 25| |
+ 26| |// Notes:
+ 27| |// 1. Compare this program and its coverage results to those of the similar tests `abort.rs` and
+ 28| |// `try_error_result.rs`.
+ 29| |// 2. Since the `panic_unwind.rs` test is allowed to unwind, it is also allowed to execute the
+ 30| |// normal program exit cleanup, including writing out the current values of the coverage
+ 31| |// counters.
+
diff --git a/tests/run-coverage/panic_unwind.rs b/tests/run-coverage/panic_unwind.rs
new file mode 100644
index 000000000..638d2eb6a
--- /dev/null
+++ b/tests/run-coverage/panic_unwind.rs
@@ -0,0 +1,31 @@
+#![allow(unused_assignments)]
+// failure-status: 101
+
+fn might_panic(should_panic: bool) {
+ if should_panic {
+ println!("panicking...");
+ panic!("panics");
+ } else {
+ println!("Don't Panic");
+ }
+}
+
+fn main() -> Result<(), u8> {
+ let mut countdown = 10;
+ while countdown > 0 {
+ if countdown == 1 {
+ might_panic(true);
+ } else if countdown < 5 {
+ might_panic(false);
+ }
+ countdown -= 1;
+ }
+ Ok(())
+}
+
+// Notes:
+// 1. Compare this program and its coverage results to those of the similar tests `abort.rs` and
+// `try_error_result.rs`.
+// 2. Since the `panic_unwind.rs` test is allowed to unwind, it is also allowed to execute the
+// normal program exit cleanup, including writing out the current values of the coverage
+// counters.
diff --git a/tests/run-coverage/partial_eq.coverage b/tests/run-coverage/partial_eq.coverage
new file mode 100644
index 000000000..a77175af6
--- /dev/null
+++ b/tests/run-coverage/partial_eq.coverage
@@ -0,0 +1,48 @@
+ 1| |// This test confirms an earlier problem was resolved, supporting the MIR graph generated by the
+ 2| |// structure of this test.
+ 3| |
+ 4| 2|#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
+ ^0 ^0 ^0 ^1 ^1 ^0^0
+ 5| |pub struct Version {
+ 6| | major: usize,
+ 7| | minor: usize,
+ 8| | patch: usize,
+ 9| |}
+ 10| |
+ 11| |impl Version {
+ 12| 2| pub fn new(major: usize, minor: usize, patch: usize) -> Self {
+ 13| 2| Self {
+ 14| 2| major,
+ 15| 2| minor,
+ 16| 2| patch,
+ 17| 2| }
+ 18| 2| }
+ 19| |}
+ 20| |
+ 21| 1|fn main() {
+ 22| 1| let version_3_2_1 = Version::new(3, 2, 1);
+ 23| 1| let version_3_3_0 = Version::new(3, 3, 0);
+ 24| 1|
+ 25| 1| println!("{:?} < {:?} = {}", version_3_2_1, version_3_3_0, version_3_2_1 < version_3_3_0);
+ 26| 1|}
+ 27| |
+ 28| |/*
+ 29| |
+ 30| |This test verifies a bug was fixed that otherwise generated this error:
+ 31| |
+ 32| |thread 'rustc' panicked at 'No counters provided the source_hash for function:
+ 33| | Instance {
+ 34| | def: Item(WithOptConstParam {
+ 35| | did: DefId(0:101 ~ autocfg[c44a]::version::{impl#2}::partial_cmp),
+ 36| | const_param_did: None
+ 37| | }),
+ 38| | substs: []
+ 39| | }'
+ 40| |The `PartialOrd` derived by `Version` happened to generate a MIR that generated coverage
+ 41| |without a code region associated with any `Counter`. Code regions were associated with at least
+ 42| |one expression, which is allowed, but the `function_source_hash` was only passed to the codegen
+ 43| |(coverage mapgen) phase from a `Counter`s code region. A new method was added to pass the
+ 44| |`function_source_hash` without a code region, if necessary.
+ 45| |
+ 46| |*/
+
diff --git a/tests/run-coverage/partial_eq.rs b/tests/run-coverage/partial_eq.rs
new file mode 100644
index 000000000..4ceaba9b1
--- /dev/null
+++ b/tests/run-coverage/partial_eq.rs
@@ -0,0 +1,46 @@
+// This test confirms an earlier problem was resolved, supporting the MIR graph generated by the
+// structure of this test.
+
+#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Version {
+ major: usize,
+ minor: usize,
+ patch: usize,
+}
+
+impl Version {
+ pub fn new(major: usize, minor: usize, patch: usize) -> Self {
+ Self {
+ major,
+ minor,
+ patch,
+ }
+ }
+}
+
+fn main() {
+ let version_3_2_1 = Version::new(3, 2, 1);
+ let version_3_3_0 = Version::new(3, 3, 0);
+
+ println!("{:?} < {:?} = {}", version_3_2_1, version_3_3_0, version_3_2_1 < version_3_3_0);
+}
+
+/*
+
+This test verifies a bug was fixed that otherwise generated this error:
+
+thread 'rustc' panicked at 'No counters provided the source_hash for function:
+ Instance {
+ def: Item(WithOptConstParam {
+ did: DefId(0:101 ~ autocfg[c44a]::version::{impl#2}::partial_cmp),
+ const_param_did: None
+ }),
+ substs: []
+ }'
+The `PartialOrd` derived by `Version` happened to generate a MIR that generated coverage
+without a code region associated with any `Counter`. Code regions were associated with at least
+one expression, which is allowed, but the `function_source_hash` was only passed to the codegen
+(coverage mapgen) phase from a `Counter`s code region. A new method was added to pass the
+`function_source_hash` without a code region, if necessary.
+
+*/
diff --git a/tests/run-coverage/simple_loop.coverage b/tests/run-coverage/simple_loop.coverage
new file mode 100644
index 000000000..feb83bad6
--- /dev/null
+++ b/tests/run-coverage/simple_loop.coverage
@@ -0,0 +1,37 @@
+ 1| |#![allow(unused_assignments)]
+ 2| |
+ 3| 1|fn main() {
+ 4| 1| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 5| 1| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 6| 1| // dependent conditions.
+ 7| 1| let is_true = std::env::args().len() == 1;
+ 8| 1|
+ 9| 1| let mut countdown = 0;
+ 10| 1|
+ 11| 1| if
+ 12| 1| is_true
+ 13| 1| {
+ 14| 1| countdown
+ 15| 1| =
+ 16| 1| 10
+ 17| 1| ;
+ 18| 1| }
+ ^0
+ 19| |
+ 20| | loop
+ 21| | {
+ 22| | if
+ 23| 11| countdown
+ 24| 11| ==
+ 25| 11| 0
+ 26| | {
+ 27| 1| break
+ 28| | ;
+ 29| 10| }
+ 30| 10| countdown
+ 31| 10| -=
+ 32| 10| 1
+ 33| | ;
+ 34| | }
+ 35| 1|}
+
diff --git a/tests/run-coverage/simple_loop.rs b/tests/run-coverage/simple_loop.rs
new file mode 100644
index 000000000..6f7f23475
--- /dev/null
+++ b/tests/run-coverage/simple_loop.rs
@@ -0,0 +1,35 @@
+#![allow(unused_assignments)]
+
+fn main() {
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let is_true = std::env::args().len() == 1;
+
+ let mut countdown = 0;
+
+ if
+ is_true
+ {
+ countdown
+ =
+ 10
+ ;
+ }
+
+ loop
+ {
+ if
+ countdown
+ ==
+ 0
+ {
+ break
+ ;
+ }
+ countdown
+ -=
+ 1
+ ;
+ }
+}
diff --git a/tests/run-coverage/simple_match.coverage b/tests/run-coverage/simple_match.coverage
new file mode 100644
index 000000000..b92982131
--- /dev/null
+++ b/tests/run-coverage/simple_match.coverage
@@ -0,0 +1,45 @@
+ 1| |#![allow(unused_assignments, unused_variables)]
+ 2| |
+ 3| 1|fn main() {
+ 4| 1| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 5| 1| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 6| 1| // dependent conditions.
+ 7| 1| let is_true = std::env::args().len() == 1;
+ 8| 1|
+ 9| 1| let mut countdown = 1;
+ 10| 1| if is_true {
+ 11| 1| countdown = 0;
+ 12| 1| }
+ ^0
+ 13| |
+ 14| | for
+ 15| | _
+ 16| | in
+ 17| 3| 0..2
+ 18| | {
+ 19| | let z
+ 20| | ;
+ 21| | match
+ 22| 2| countdown
+ 23| | {
+ 24| 1| x
+ 25| | if
+ 26| 2| x
+ 27| 2| <
+ 28| 2| 1
+ 29| | =>
+ 30| 1| {
+ 31| 1| z = countdown
+ 32| 1| ;
+ 33| 1| let y = countdown
+ 34| 1| ;
+ 35| 1| countdown = 10
+ 36| 1| ;
+ 37| 1| }
+ 38| | _
+ 39| | =>
+ 40| 1| {}
+ 41| | }
+ 42| | }
+ 43| 1|}
+
diff --git a/tests/run-coverage/simple_match.rs b/tests/run-coverage/simple_match.rs
new file mode 100644
index 000000000..be99e59a8
--- /dev/null
+++ b/tests/run-coverage/simple_match.rs
@@ -0,0 +1,43 @@
+#![allow(unused_assignments, unused_variables)]
+
+fn main() {
+ // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ // dependent conditions.
+ let is_true = std::env::args().len() == 1;
+
+ let mut countdown = 1;
+ if is_true {
+ countdown = 0;
+ }
+
+ for
+ _
+ in
+ 0..2
+ {
+ let z
+ ;
+ match
+ countdown
+ {
+ x
+ if
+ x
+ <
+ 1
+ =>
+ {
+ z = countdown
+ ;
+ let y = countdown
+ ;
+ countdown = 10
+ ;
+ }
+ _
+ =>
+ {}
+ }
+ }
+}
diff --git a/tests/run-coverage/sort_groups.coverage b/tests/run-coverage/sort_groups.coverage
new file mode 100644
index 000000000..81468cb35
--- /dev/null
+++ b/tests/run-coverage/sort_groups.coverage
@@ -0,0 +1,49 @@
+ 1| |// compile-flags: --edition=2021
+ 2| |
+ 3| |// Demonstrate that `sort_subviews.py` can sort instantiation groups into a
+ 4| |// predictable order, while preserving their heterogeneous contents.
+ 5| |
+ 6| 1|fn main() {
+ 7| 1| let cond = std::env::args().len() > 1;
+ 8| 1| generic_fn::<()>(cond);
+ 9| 1| generic_fn::<&'static str>(!cond);
+ 10| 1| if false {
+ 11| 0| generic_fn::<char>(cond);
+ 12| 1| }
+ 13| 1| generic_fn::<i32>(cond);
+ 14| 1| other_fn();
+ 15| 1|}
+ 16| |
+ 17| 3|fn generic_fn<T>(cond: bool) {
+ 18| 3| if cond {
+ 19| 1| println!("{}", std::any::type_name::<T>());
+ 20| 2| }
+ 21| 3|}
+ ------------------
+ | Unexecuted instantiation: sort_groups::generic_fn::<char>
+ ------------------
+ | sort_groups::generic_fn::<&str>:
+ | 17| 1|fn generic_fn<T>(cond: bool) {
+ | 18| 1| if cond {
+ | 19| 1| println!("{}", std::any::type_name::<T>());
+ | 20| 1| }
+ | ^0
+ | 21| 1|}
+ ------------------
+ | sort_groups::generic_fn::<()>:
+ | 17| 1|fn generic_fn<T>(cond: bool) {
+ | 18| 1| if cond {
+ | 19| 0| println!("{}", std::any::type_name::<T>());
+ | 20| 1| }
+ | 21| 1|}
+ ------------------
+ | sort_groups::generic_fn::<i32>:
+ | 17| 1|fn generic_fn<T>(cond: bool) {
+ | 18| 1| if cond {
+ | 19| 0| println!("{}", std::any::type_name::<T>());
+ | 20| 1| }
+ | 21| 1|}
+ ------------------
+ 22| |
+ 23| 1|fn other_fn() {}
+
diff --git a/tests/run-coverage/sort_groups.rs b/tests/run-coverage/sort_groups.rs
new file mode 100644
index 000000000..f89f9f3ec
--- /dev/null
+++ b/tests/run-coverage/sort_groups.rs
@@ -0,0 +1,23 @@
+// compile-flags: --edition=2021
+
+// Demonstrate that `sort_subviews.py` can sort instantiation groups into a
+// predictable order, while preserving their heterogeneous contents.
+
+fn main() {
+ let cond = std::env::args().len() > 1;
+ generic_fn::<()>(cond);
+ generic_fn::<&'static str>(!cond);
+ if false {
+ generic_fn::<char>(cond);
+ }
+ generic_fn::<i32>(cond);
+ other_fn();
+}
+
+fn generic_fn<T>(cond: bool) {
+ if cond {
+ println!("{}", std::any::type_name::<T>());
+ }
+}
+
+fn other_fn() {}
diff --git a/tests/run-coverage/test_harness.coverage b/tests/run-coverage/test_harness.coverage
new file mode 100644
index 000000000..93bd1cfcb
--- /dev/null
+++ b/tests/run-coverage/test_harness.coverage
@@ -0,0 +1,11 @@
+ 1| |// Verify that the entry point injected by the test harness doesn't cause
+ 2| |// weird artifacts in the coverage report (e.g. issue #10749).
+ 3| |
+ 4| |// compile-flags: --test
+ 5| |
+ 6| |#[allow(dead_code)]
+ 7| 0|fn unused() {}
+ 8| |
+ 9| 1|#[test]
+ 10| 1|fn my_test() {}
+
diff --git a/tests/run-coverage/test_harness.rs b/tests/run-coverage/test_harness.rs
new file mode 100644
index 000000000..12a755734
--- /dev/null
+++ b/tests/run-coverage/test_harness.rs
@@ -0,0 +1,10 @@
+// Verify that the entry point injected by the test harness doesn't cause
+// weird artifacts in the coverage report (e.g. issue #10749).
+
+// compile-flags: --test
+
+#[allow(dead_code)]
+fn unused() {}
+
+#[test]
+fn my_test() {}
diff --git a/tests/run-coverage/tight_inf_loop.coverage b/tests/run-coverage/tight_inf_loop.coverage
new file mode 100644
index 000000000..2d4c57f45
--- /dev/null
+++ b/tests/run-coverage/tight_inf_loop.coverage
@@ -0,0 +1,6 @@
+ 1| 1|fn main() {
+ 2| 1| if false {
+ 3| 0| loop {}
+ 4| 1| }
+ 5| 1|}
+
diff --git a/tests/run-coverage/tight_inf_loop.rs b/tests/run-coverage/tight_inf_loop.rs
new file mode 100644
index 000000000..cef99027a
--- /dev/null
+++ b/tests/run-coverage/tight_inf_loop.rs
@@ -0,0 +1,5 @@
+fn main() {
+ if false {
+ loop {}
+ }
+}
diff --git a/tests/run-coverage/try_error_result.coverage b/tests/run-coverage/try_error_result.coverage
new file mode 100644
index 000000000..efe573a56
--- /dev/null
+++ b/tests/run-coverage/try_error_result.coverage
@@ -0,0 +1,125 @@
+ 1| |#![allow(unused_assignments)]
+ 2| |// failure-status: 1
+ 3| |
+ 4| 6|fn call(return_error: bool) -> Result<(),()> {
+ 5| 6| if return_error {
+ 6| 1| Err(())
+ 7| | } else {
+ 8| 5| Ok(())
+ 9| | }
+ 10| 6|}
+ 11| |
+ 12| 1|fn test1() -> Result<(),()> {
+ 13| 1| let mut
+ 14| 1| countdown = 10
+ 15| | ;
+ 16| | for
+ 17| | _
+ 18| | in
+ 19| 6| 0..10
+ 20| | {
+ 21| 6| countdown
+ 22| 6| -= 1
+ 23| 6| ;
+ 24| 6| if
+ 25| 6| countdown < 5
+ 26| | {
+ 27| 1| call(/*return_error=*/ true)?;
+ 28| 0| call(/*return_error=*/ false)?;
+ 29| | }
+ 30| | else
+ 31| | {
+ 32| 5| call(/*return_error=*/ false)?;
+ ^0
+ 33| | }
+ 34| | }
+ 35| 0| Ok(())
+ 36| 1|}
+ 37| |
+ 38| |struct Thing1;
+ 39| |impl Thing1 {
+ 40| 18| fn get_thing_2(&self, return_error: bool) -> Result<Thing2,()> {
+ 41| 18| if return_error {
+ 42| 1| Err(())
+ 43| | } else {
+ 44| 17| Ok(Thing2{})
+ 45| | }
+ 46| 18| }
+ 47| |}
+ 48| |
+ 49| |struct Thing2;
+ 50| |impl Thing2 {
+ 51| 17| fn call(&self, return_error: bool) -> Result<u32,()> {
+ 52| 17| if return_error {
+ 53| 2| Err(())
+ 54| | } else {
+ 55| 15| Ok(57)
+ 56| | }
+ 57| 17| }
+ 58| |}
+ 59| |
+ 60| 1|fn test2() -> Result<(),()> {
+ 61| 1| let thing1 = Thing1{};
+ 62| 1| let mut
+ 63| 1| countdown = 10
+ 64| | ;
+ 65| | for
+ 66| | _
+ 67| | in
+ 68| 6| 0..10
+ 69| | {
+ 70| 6| countdown
+ 71| 6| -= 1
+ 72| 6| ;
+ 73| 6| if
+ 74| 6| countdown < 5
+ 75| | {
+ 76| 1| thing1.get_thing_2(/*err=*/ false)?.call(/*err=*/ true).expect_err("call should fail");
+ ^0
+ 77| 1| thing1
+ 78| 1| .
+ 79| 1| get_thing_2(/*return_error=*/ false)
+ 80| 0| ?
+ 81| | .
+ 82| 1| call(/*return_error=*/ true)
+ 83| 1| .
+ 84| 1| expect_err(
+ 85| 1| "call should fail"
+ 86| 1| );
+ 87| 1| let val = thing1.get_thing_2(/*return_error=*/ true)?.call(/*return_error=*/ true)?;
+ ^0 ^0 ^0
+ 88| 0| assert_eq!(val, 57);
+ 89| 0| let val = thing1.get_thing_2(/*return_error=*/ true)?.call(/*return_error=*/ false)?;
+ 90| 0| assert_eq!(val, 57);
+ 91| | }
+ 92| | else
+ 93| | {
+ 94| 5| let val = thing1.get_thing_2(/*return_error=*/ false)?.call(/*return_error=*/ false)?;
+ ^0 ^0
+ 95| 5| assert_eq!(val, 57);
+ 96| 5| let val = thing1
+ 97| 5| .get_thing_2(/*return_error=*/ false)?
+ ^0
+ 98| 5| .call(/*return_error=*/ false)?;
+ ^0
+ 99| 5| assert_eq!(val, 57);
+ 100| 5| let val = thing1
+ 101| 5| .get_thing_2(/*return_error=*/ false)
+ 102| 0| ?
+ 103| 5| .call(/*return_error=*/ false)
+ 104| 0| ?
+ 105| | ;
+ 106| 5| assert_eq!(val, 57);
+ 107| | }
+ 108| | }
+ 109| 0| Ok(())
+ 110| 1|}
+ 111| |
+ 112| 1|fn main() -> Result<(),()> {
+ 113| 1| test1().expect_err("test1 should fail");
+ 114| 1| test2()
+ 115| 1| ?
+ 116| | ;
+ 117| 0| Ok(())
+ 118| 1|}
+
diff --git a/tests/run-coverage/try_error_result.rs b/tests/run-coverage/try_error_result.rs
new file mode 100644
index 000000000..9eb1d2db2
--- /dev/null
+++ b/tests/run-coverage/try_error_result.rs
@@ -0,0 +1,118 @@
+#![allow(unused_assignments)]
+// failure-status: 1
+
+fn call(return_error: bool) -> Result<(),()> {
+ if return_error {
+ Err(())
+ } else {
+ Ok(())
+ }
+}
+
+fn test1() -> Result<(),()> {
+ let mut
+ countdown = 10
+ ;
+ for
+ _
+ in
+ 0..10
+ {
+ countdown
+ -= 1
+ ;
+ if
+ countdown < 5
+ {
+ call(/*return_error=*/ true)?;
+ call(/*return_error=*/ false)?;
+ }
+ else
+ {
+ call(/*return_error=*/ false)?;
+ }
+ }
+ Ok(())
+}
+
+struct Thing1;
+impl Thing1 {
+ fn get_thing_2(&self, return_error: bool) -> Result<Thing2,()> {
+ if return_error {
+ Err(())
+ } else {
+ Ok(Thing2{})
+ }
+ }
+}
+
+struct Thing2;
+impl Thing2 {
+ fn call(&self, return_error: bool) -> Result<u32,()> {
+ if return_error {
+ Err(())
+ } else {
+ Ok(57)
+ }
+ }
+}
+
+fn test2() -> Result<(),()> {
+ let thing1 = Thing1{};
+ let mut
+ countdown = 10
+ ;
+ for
+ _
+ in
+ 0..10
+ {
+ countdown
+ -= 1
+ ;
+ if
+ countdown < 5
+ {
+ thing1.get_thing_2(/*err=*/ false)?.call(/*err=*/ true).expect_err("call should fail");
+ thing1
+ .
+ get_thing_2(/*return_error=*/ false)
+ ?
+ .
+ call(/*return_error=*/ true)
+ .
+ expect_err(
+ "call should fail"
+ );
+ let val = thing1.get_thing_2(/*return_error=*/ true)?.call(/*return_error=*/ true)?;
+ assert_eq!(val, 57);
+ let val = thing1.get_thing_2(/*return_error=*/ true)?.call(/*return_error=*/ false)?;
+ assert_eq!(val, 57);
+ }
+ else
+ {
+ let val = thing1.get_thing_2(/*return_error=*/ false)?.call(/*return_error=*/ false)?;
+ assert_eq!(val, 57);
+ let val = thing1
+ .get_thing_2(/*return_error=*/ false)?
+ .call(/*return_error=*/ false)?;
+ assert_eq!(val, 57);
+ let val = thing1
+ .get_thing_2(/*return_error=*/ false)
+ ?
+ .call(/*return_error=*/ false)
+ ?
+ ;
+ assert_eq!(val, 57);
+ }
+ }
+ Ok(())
+}
+
+fn main() -> Result<(),()> {
+ test1().expect_err("test1 should fail");
+ test2()
+ ?
+ ;
+ Ok(())
+}
diff --git a/tests/run-coverage/unused.coverage b/tests/run-coverage/unused.coverage
new file mode 100644
index 000000000..15fcf21c0
--- /dev/null
+++ b/tests/run-coverage/unused.coverage
@@ -0,0 +1,62 @@
+ 1| 2|fn foo<T>(x: T) {
+ 2| 2| let mut i = 0;
+ 3| 22| while i < 10 {
+ 4| 20| i != 0 || i != 0;
+ ^2
+ 5| 20| i += 1;
+ 6| | }
+ 7| 2|}
+ ------------------
+ | unused::foo::<f32>:
+ | 1| 1|fn foo<T>(x: T) {
+ | 2| 1| let mut i = 0;
+ | 3| 11| while i < 10 {
+ | 4| 10| i != 0 || i != 0;
+ | ^1
+ | 5| 10| i += 1;
+ | 6| | }
+ | 7| 1|}
+ ------------------
+ | unused::foo::<u32>:
+ | 1| 1|fn foo<T>(x: T) {
+ | 2| 1| let mut i = 0;
+ | 3| 11| while i < 10 {
+ | 4| 10| i != 0 || i != 0;
+ | ^1
+ | 5| 10| i += 1;
+ | 6| | }
+ | 7| 1|}
+ ------------------
+ 8| |
+ 9| 0|fn unused_template_func<T>(x: T) {
+ 10| 0| let mut i = 0;
+ 11| 0| while i < 10 {
+ 12| 0| i != 0 || i != 0;
+ 13| 0| i += 1;
+ 14| | }
+ 15| 0|}
+ 16| |
+ 17| 0|fn unused_func(mut a: u32) {
+ 18| 0| if a != 0 {
+ 19| 0| a += 1;
+ 20| 0| }
+ 21| 0|}
+ 22| |
+ 23| 0|fn unused_func2(mut a: u32) {
+ 24| 0| if a != 0 {
+ 25| 0| a += 1;
+ 26| 0| }
+ 27| 0|}
+ 28| |
+ 29| 0|fn unused_func3(mut a: u32) {
+ 30| 0| if a != 0 {
+ 31| 0| a += 1;
+ 32| 0| }
+ 33| 0|}
+ 34| |
+ 35| 1|fn main() -> Result<(), u8> {
+ 36| 1| foo::<u32>(0);
+ 37| 1| foo::<f32>(0.0);
+ 38| 1| Ok(())
+ 39| 1|}
+
diff --git a/tests/run-coverage/unused.rs b/tests/run-coverage/unused.rs
new file mode 100644
index 000000000..fb6113eb0
--- /dev/null
+++ b/tests/run-coverage/unused.rs
@@ -0,0 +1,39 @@
+fn foo<T>(x: T) {
+ let mut i = 0;
+ while i < 10 {
+ i != 0 || i != 0;
+ i += 1;
+ }
+}
+
+fn unused_template_func<T>(x: T) {
+ let mut i = 0;
+ while i < 10 {
+ i != 0 || i != 0;
+ i += 1;
+ }
+}
+
+fn unused_func(mut a: u32) {
+ if a != 0 {
+ a += 1;
+ }
+}
+
+fn unused_func2(mut a: u32) {
+ if a != 0 {
+ a += 1;
+ }
+}
+
+fn unused_func3(mut a: u32) {
+ if a != 0 {
+ a += 1;
+ }
+}
+
+fn main() -> Result<(), u8> {
+ foo::<u32>(0);
+ foo::<f32>(0.0);
+ Ok(())
+}
diff --git a/tests/run-coverage/unused_mod.coverage b/tests/run-coverage/unused_mod.coverage
new file mode 100644
index 000000000..e1d82f66f
--- /dev/null
+++ b/tests/run-coverage/unused_mod.coverage
@@ -0,0 +1,13 @@
+$DIR/auxiliary/unused_mod_helper.rs:
+ 1| 0|pub fn never_called_function() {
+ 2| 0| println!("I am never called");
+ 3| 0|}
+
+$DIR/unused_mod.rs:
+ 1| |#[path = "auxiliary/unused_mod_helper.rs"]
+ 2| |mod unused_module;
+ 3| |
+ 4| 1|fn main() {
+ 5| 1| println!("hello world!");
+ 6| 1|}
+
diff --git a/tests/run-coverage/unused_mod.rs b/tests/run-coverage/unused_mod.rs
new file mode 100644
index 000000000..6e62839c9
--- /dev/null
+++ b/tests/run-coverage/unused_mod.rs
@@ -0,0 +1,6 @@
+#[path = "auxiliary/unused_mod_helper.rs"]
+mod unused_module;
+
+fn main() {
+ println!("hello world!");
+}
diff --git a/tests/run-coverage/uses_crate.coverage b/tests/run-coverage/uses_crate.coverage
new file mode 100644
index 000000000..a3b78e214
--- /dev/null
+++ b/tests/run-coverage/uses_crate.coverage
@@ -0,0 +1,170 @@
+$DIR/auxiliary/used_crate.rs:
+ 1| |#![allow(unused_assignments, unused_variables)]
+ 2| |// compile-flags: -C opt-level=3
+ 3| |use std::fmt::Debug; // ^^ validates coverage now works with optimizations
+ 4| |
+ 5| 1|pub fn used_function() {
+ 6| 1| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 7| 1| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 8| 1| // dependent conditions.
+ 9| 1| let is_true = std::env::args().len() == 1;
+ 10| 1| let mut countdown = 0;
+ 11| 1| if is_true {
+ 12| 1| countdown = 10;
+ 13| 1| }
+ ^0
+ 14| 1| use_this_lib_crate();
+ 15| 1|}
+ 16| |
+ 17| 2|pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) {
+ 18| 2| println!("used_only_from_bin_crate_generic_function with {:?}", arg);
+ 19| 2|}
+ ------------------
+ | Unexecuted instantiation: used_crate::used_only_from_bin_crate_generic_function::<_>
+ ------------------
+ | used_crate::used_only_from_bin_crate_generic_function::<&alloc::vec::Vec<i32>>:
+ | 17| 1|pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) {
+ | 18| 1| println!("used_only_from_bin_crate_generic_function with {:?}", arg);
+ | 19| 1|}
+ ------------------
+ | used_crate::used_only_from_bin_crate_generic_function::<&str>:
+ | 17| 1|pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) {
+ | 18| 1| println!("used_only_from_bin_crate_generic_function with {:?}", arg);
+ | 19| 1|}
+ ------------------
+ 20| |// Expect for above function: `Unexecuted instantiation` (see below)
+ 21| 2|pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) {
+ 22| 2| println!("used_only_from_this_lib_crate_generic_function with {:?}", arg);
+ 23| 2|}
+ ------------------
+ | used_crate::used_only_from_this_lib_crate_generic_function::<&str>:
+ | 21| 1|pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) {
+ | 22| 1| println!("used_only_from_this_lib_crate_generic_function with {:?}", arg);
+ | 23| 1|}
+ ------------------
+ | used_crate::used_only_from_this_lib_crate_generic_function::<alloc::vec::Vec<i32>>:
+ | 21| 1|pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) {
+ | 22| 1| println!("used_only_from_this_lib_crate_generic_function with {:?}", arg);
+ | 23| 1|}
+ ------------------
+ 24| |
+ 25| 2|pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ 26| 2| println!("used_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+ 27| 2|}
+ ------------------
+ | used_crate::used_from_bin_crate_and_lib_crate_generic_function::<&str>:
+ | 25| 1|pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ | 26| 1| println!("used_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+ | 27| 1|}
+ ------------------
+ | used_crate::used_from_bin_crate_and_lib_crate_generic_function::<alloc::vec::Vec<i32>>:
+ | 25| 1|pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ | 26| 1| println!("used_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+ | 27| 1|}
+ ------------------
+ 28| |
+ 29| 2|pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ 30| 2| println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+ 31| 2|}
+ ------------------
+ | used_crate::used_with_same_type_from_bin_crate_and_lib_crate_generic_function::<&str>:
+ | 29| 1|pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ | 30| 1| println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+ | 31| 1|}
+ ------------------
+ | used_crate::used_with_same_type_from_bin_crate_and_lib_crate_generic_function::<&str>:
+ | 29| 1|pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ | 30| 1| println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+ | 31| 1|}
+ ------------------
+ 32| |
+ 33| 0|pub fn unused_generic_function<T: Debug>(arg: T) {
+ 34| 0| println!("unused_generic_function with {:?}", arg);
+ 35| 0|}
+ 36| |
+ 37| 0|pub fn unused_function() {
+ 38| 0| let is_true = std::env::args().len() == 1;
+ 39| 0| let mut countdown = 2;
+ 40| 0| if !is_true {
+ 41| 0| countdown = 20;
+ 42| 0| }
+ 43| 0|}
+ 44| |
+ 45| 0|fn unused_private_function() {
+ 46| 0| let is_true = std::env::args().len() == 1;
+ 47| 0| let mut countdown = 2;
+ 48| 0| if !is_true {
+ 49| 0| countdown = 20;
+ 50| 0| }
+ 51| 0|}
+ 52| |
+ 53| 1|fn use_this_lib_crate() {
+ 54| 1| used_from_bin_crate_and_lib_crate_generic_function("used from library used_crate.rs");
+ 55| 1| used_with_same_type_from_bin_crate_and_lib_crate_generic_function(
+ 56| 1| "used from library used_crate.rs",
+ 57| 1| );
+ 58| 1| let some_vec = vec![5, 6, 7, 8];
+ 59| 1| used_only_from_this_lib_crate_generic_function(some_vec);
+ 60| 1| used_only_from_this_lib_crate_generic_function("used ONLY from library used_crate.rs");
+ 61| 1|}
+ 62| |
+ 63| |// FIXME(#79651): "Unexecuted instantiation" errors appear in coverage results,
+ 64| |// for example:
+ 65| |//
+ 66| |// | Unexecuted instantiation: used_crate::used_only_from_bin_crate_generic_function::<_>
+ 67| |//
+ 68| |// These notices appear when `llvm-cov` shows instantiations. This may be a
+ 69| |// default option, but it can be suppressed with:
+ 70| |//
+ 71| |// ```shell
+ 72| |// $ `llvm-cov show --show-instantiations=0 ...`
+ 73| |// ```
+ 74| |//
+ 75| |// The notice is triggered because the function is unused by the library itself,
+ 76| |// and when the library is compiled, a synthetic function is generated, so
+ 77| |// unused function coverage can be reported. Coverage can be skipped for unused
+ 78| |// generic functions with:
+ 79| |//
+ 80| |// ```shell
+ 81| |// $ `rustc -Zunstable-options -C instrument-coverage=except-unused-generics ...`
+ 82| |// ```
+ 83| |//
+ 84| |// Even though this function is used by `uses_crate.rs` (and
+ 85| |// counted), with substitutions for `T`, those instantiations are only generated
+ 86| |// when the generic function is actually used (from the binary, not from this
+ 87| |// library crate). So the test result shows coverage for all instantiated
+ 88| |// versions and their generic type substitutions, plus the `Unexecuted
+ 89| |// instantiation` message for the non-substituted version. This is valid, but
+ 90| |// unfortunately a little confusing.
+ 91| |//
+ 92| |// The library crate has its own coverage map, and the only way to show unused
+ 93| |// coverage of a generic function is to include the generic function in the
+ 94| |// coverage map, marked as an "unused function". If the library were used by
+ 95| |// another binary that never used this generic function, then it would be valid
+ 96| |// to show the unused generic, with unknown substitution (`_`).
+ 97| |//
+ 98| |// The alternative is to exclude all generics from being included in the "unused
+ 99| |// functions" list, which would then omit coverage results for
+ 100| |// `unused_generic_function<T>()`, below.
+
+$DIR/uses_crate.rs:
+ 1| |// FIXME #110395
+ 2| |// ignore-linux
+ 3| |
+ 4| |// Validates coverage now works with optimizations
+ 5| |// compile-flags: -C opt-level=3
+ 6| |
+ 7| |#![allow(unused_assignments, unused_variables)]
+ 8| |
+ 9| |// aux-build:used_crate.rs
+ 10| |extern crate used_crate;
+ 11| |
+ 12| 1|fn main() {
+ 13| 1| used_crate::used_function();
+ 14| 1| let some_vec = vec![1, 2, 3, 4];
+ 15| 1| used_crate::used_only_from_bin_crate_generic_function(&some_vec);
+ 16| 1| used_crate::used_only_from_bin_crate_generic_function("used from bin uses_crate.rs");
+ 17| 1| used_crate::used_from_bin_crate_and_lib_crate_generic_function(some_vec);
+ 18| 1| used_crate::used_with_same_type_from_bin_crate_and_lib_crate_generic_function("interesting?");
+ 19| 1|}
+
diff --git a/tests/run-coverage/uses_crate.rs b/tests/run-coverage/uses_crate.rs
new file mode 100644
index 000000000..ab466970f
--- /dev/null
+++ b/tests/run-coverage/uses_crate.rs
@@ -0,0 +1,19 @@
+// FIXME #110395
+// ignore-linux
+
+// Validates coverage now works with optimizations
+// compile-flags: -C opt-level=3
+
+#![allow(unused_assignments, unused_variables)]
+
+// aux-build:used_crate.rs
+extern crate used_crate;
+
+fn main() {
+ used_crate::used_function();
+ let some_vec = vec![1, 2, 3, 4];
+ used_crate::used_only_from_bin_crate_generic_function(&some_vec);
+ used_crate::used_only_from_bin_crate_generic_function("used from bin uses_crate.rs");
+ used_crate::used_from_bin_crate_and_lib_crate_generic_function(some_vec);
+ used_crate::used_with_same_type_from_bin_crate_and_lib_crate_generic_function("interesting?");
+}
diff --git a/tests/run-coverage/uses_inline_crate.coverage b/tests/run-coverage/uses_inline_crate.coverage
new file mode 100644
index 000000000..f878d8107
--- /dev/null
+++ b/tests/run-coverage/uses_inline_crate.coverage
@@ -0,0 +1,164 @@
+$DIR/auxiliary/used_inline_crate.rs:
+ 1| |#![allow(unused_assignments, unused_variables)]
+ 2| |
+ 3| |// compile-flags: -C opt-level=3
+ 4| |// ^^ validates coverage now works with optimizations
+ 5| |use std::fmt::Debug;
+ 6| |
+ 7| 1|pub fn used_function() {
+ 8| 1| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 9| 1| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 10| 1| // dependent conditions.
+ 11| 1| let is_true = std::env::args().len() == 1;
+ 12| 1| let mut countdown = 0;
+ 13| 1| if is_true {
+ 14| 1| countdown = 10;
+ 15| 1| }
+ ^0
+ 16| 1| use_this_lib_crate();
+ 17| 1|}
+ 18| |
+ 19| |#[inline(always)]
+ 20| 1|pub fn used_inline_function() {
+ 21| 1| // Initialize test constants in a way that cannot be determined at compile time, to ensure
+ 22| 1| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
+ 23| 1| // dependent conditions.
+ 24| 1| let is_true = std::env::args().len() == 1;
+ 25| 1| let mut countdown = 0;
+ 26| 1| if is_true {
+ 27| 1| countdown = 10;
+ 28| 1| }
+ ^0
+ 29| 1| use_this_lib_crate();
+ 30| 1|}
+ 31| |
+ 32| |
+ 33| |
+ 34| |
+ 35| |
+ 36| |
+ 37| |
+ 38| |#[inline(always)]
+ 39| 2|pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) {
+ 40| 2| println!("used_only_from_bin_crate_generic_function with {:?}", arg);
+ 41| 2|}
+ ------------------
+ | Unexecuted instantiation: used_inline_crate::used_only_from_bin_crate_generic_function::<_>
+ ------------------
+ | used_inline_crate::used_only_from_bin_crate_generic_function::<&alloc::vec::Vec<i32>>:
+ | 39| 1|pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) {
+ | 40| 1| println!("used_only_from_bin_crate_generic_function with {:?}", arg);
+ | 41| 1|}
+ ------------------
+ | used_inline_crate::used_only_from_bin_crate_generic_function::<&str>:
+ | 39| 1|pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) {
+ | 40| 1| println!("used_only_from_bin_crate_generic_function with {:?}", arg);
+ | 41| 1|}
+ ------------------
+ 42| |// Expect for above function: `Unexecuted instantiation` (see notes in `used_crate.rs`)
+ 43| |
+ 44| |#[inline(always)]
+ 45| 4|pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) {
+ 46| 4| println!("used_only_from_this_lib_crate_generic_function with {:?}", arg);
+ 47| 4|}
+ ------------------
+ | used_inline_crate::used_only_from_this_lib_crate_generic_function::<&str>:
+ | 45| 2|pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) {
+ | 46| 2| println!("used_only_from_this_lib_crate_generic_function with {:?}", arg);
+ | 47| 2|}
+ ------------------
+ | used_inline_crate::used_only_from_this_lib_crate_generic_function::<alloc::vec::Vec<i32>>:
+ | 45| 2|pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) {
+ | 46| 2| println!("used_only_from_this_lib_crate_generic_function with {:?}", arg);
+ | 47| 2|}
+ ------------------
+ 48| |
+ 49| |#[inline(always)]
+ 50| 3|pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ 51| 3| println!("used_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+ 52| 3|}
+ ------------------
+ | used_inline_crate::used_from_bin_crate_and_lib_crate_generic_function::<&str>:
+ | 50| 2|pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ | 51| 2| println!("used_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+ | 52| 2|}
+ ------------------
+ | used_inline_crate::used_from_bin_crate_and_lib_crate_generic_function::<alloc::vec::Vec<i32>>:
+ | 50| 1|pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ | 51| 1| println!("used_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+ | 52| 1|}
+ ------------------
+ 53| |
+ 54| |#[inline(always)]
+ 55| 3|pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ 56| 3| println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+ 57| 3|}
+ ------------------
+ | used_inline_crate::used_with_same_type_from_bin_crate_and_lib_crate_generic_function::<&str>:
+ | 55| 1|pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ | 56| 1| println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+ | 57| 1|}
+ ------------------
+ | used_inline_crate::used_with_same_type_from_bin_crate_and_lib_crate_generic_function::<&str>:
+ | 55| 2|pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
+ | 56| 2| println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
+ | 57| 2|}
+ ------------------
+ 58| |
+ 59| |#[inline(always)]
+ 60| 0|pub fn unused_generic_function<T: Debug>(arg: T) {
+ 61| 0| println!("unused_generic_function with {:?}", arg);
+ 62| 0|}
+ 63| |
+ 64| |#[inline(always)]
+ 65| 0|pub fn unused_function() {
+ 66| 0| let is_true = std::env::args().len() == 1;
+ 67| 0| let mut countdown = 2;
+ 68| 0| if !is_true {
+ 69| 0| countdown = 20;
+ 70| 0| }
+ 71| 0|}
+ 72| |
+ 73| |#[inline(always)]
+ 74| 0|fn unused_private_function() {
+ 75| 0| let is_true = std::env::args().len() == 1;
+ 76| 0| let mut countdown = 2;
+ 77| 0| if !is_true {
+ 78| 0| countdown = 20;
+ 79| 0| }
+ 80| 0|}
+ 81| |
+ 82| 2|fn use_this_lib_crate() {
+ 83| 2| used_from_bin_crate_and_lib_crate_generic_function("used from library used_crate.rs");
+ 84| 2| used_with_same_type_from_bin_crate_and_lib_crate_generic_function(
+ 85| 2| "used from library used_crate.rs",
+ 86| 2| );
+ 87| 2| let some_vec = vec![5, 6, 7, 8];
+ 88| 2| used_only_from_this_lib_crate_generic_function(some_vec);
+ 89| 2| used_only_from_this_lib_crate_generic_function("used ONLY from library used_crate.rs");
+ 90| 2|}
+
+$DIR/uses_inline_crate.rs:
+ 1| |// FIXME #110395
+ 2| |// ignore-linux
+ 3| |
+ 4| |// Validates coverage now works with optimizations
+ 5| |// compile-flags: -C opt-level=3
+ 6| |
+ 7| |#![allow(unused_assignments, unused_variables)]
+ 8| |
+ 9| |// aux-build:used_inline_crate.rs
+ 10| |extern crate used_inline_crate;
+ 11| |
+ 12| 1|fn main() {
+ 13| 1| used_inline_crate::used_function();
+ 14| 1| used_inline_crate::used_inline_function();
+ 15| 1| let some_vec = vec![1, 2, 3, 4];
+ 16| 1| used_inline_crate::used_only_from_bin_crate_generic_function(&some_vec);
+ 17| 1| used_inline_crate::used_only_from_bin_crate_generic_function("used from bin uses_crate.rs");
+ 18| 1| used_inline_crate::used_from_bin_crate_and_lib_crate_generic_function(some_vec);
+ 19| 1| used_inline_crate::used_with_same_type_from_bin_crate_and_lib_crate_generic_function(
+ 20| 1| "interesting?",
+ 21| 1| );
+ 22| 1|}
+
diff --git a/tests/run-coverage/uses_inline_crate.rs b/tests/run-coverage/uses_inline_crate.rs
new file mode 100644
index 000000000..4bd66d2f8
--- /dev/null
+++ b/tests/run-coverage/uses_inline_crate.rs
@@ -0,0 +1,22 @@
+// FIXME #110395
+// ignore-linux
+
+// Validates coverage now works with optimizations
+// compile-flags: -C opt-level=3
+
+#![allow(unused_assignments, unused_variables)]
+
+// aux-build:used_inline_crate.rs
+extern crate used_inline_crate;
+
+fn main() {
+ used_inline_crate::used_function();
+ used_inline_crate::used_inline_function();
+ let some_vec = vec![1, 2, 3, 4];
+ used_inline_crate::used_only_from_bin_crate_generic_function(&some_vec);
+ used_inline_crate::used_only_from_bin_crate_generic_function("used from bin uses_crate.rs");
+ used_inline_crate::used_from_bin_crate_and_lib_crate_generic_function(some_vec);
+ used_inline_crate::used_with_same_type_from_bin_crate_and_lib_crate_generic_function(
+ "interesting?",
+ );
+}
diff --git a/tests/run-coverage/while.coverage b/tests/run-coverage/while.coverage
new file mode 100644
index 000000000..efa7d083f
--- /dev/null
+++ b/tests/run-coverage/while.coverage
@@ -0,0 +1,6 @@
+ 1| 1|fn main() {
+ 2| 1| let num = 9;
+ 3| 1| while num >= 10 {
+ 4| 0| }
+ 5| 1|}
+
diff --git a/tests/run-coverage/while.rs b/tests/run-coverage/while.rs
new file mode 100644
index 000000000..781b90b35
--- /dev/null
+++ b/tests/run-coverage/while.rs
@@ -0,0 +1,5 @@
+fn main() {
+ let num = 9;
+ while num >= 10 {
+ }
+}
diff --git a/tests/run-coverage/while_early_ret.coverage b/tests/run-coverage/while_early_ret.coverage
new file mode 100644
index 000000000..2ce94e013
--- /dev/null
+++ b/tests/run-coverage/while_early_ret.coverage
@@ -0,0 +1,43 @@
+ 1| |#![allow(unused_assignments)]
+ 2| |// failure-status: 1
+ 3| |
+ 4| 1|fn main() -> Result<(),u8> {
+ 5| 1| let mut countdown = 10;
+ 6| | while
+ 7| 7| countdown
+ 8| 7| >
+ 9| 7| 0
+ 10| | {
+ 11| | if
+ 12| 7| countdown
+ 13| 7| <
+ 14| 7| 5
+ 15| | {
+ 16| | return
+ 17| | if
+ 18| 1| countdown
+ 19| 1| >
+ 20| 1| 8
+ 21| | {
+ 22| 0| Ok(())
+ 23| | }
+ 24| | else
+ 25| | {
+ 26| 1| Err(1)
+ 27| | }
+ 28| | ;
+ 29| 6| }
+ 30| 6| countdown
+ 31| 6| -=
+ 32| 6| 1
+ 33| | ;
+ 34| | }
+ 35| 0| Ok(())
+ 36| 1|}
+ 37| |
+ 38| |// ISSUE(77553): Originally, this test had `Err(1)` on line 22 (instead of `Ok(())`) and
+ 39| |// `std::process::exit(2)` on line 26 (instead of `Err(1)`); and this worked as expected on Linux
+ 40| |// and MacOS. But on Windows (MSVC, at least), the call to `std::process::exit()` exits the program
+ 41| |// without saving the InstrProf coverage counters. The use of `std::process:exit()` is not critical
+ 42| |// to the coverage test for early returns, but this is a limitation that should be fixed.
+
diff --git a/tests/run-coverage/while_early_ret.rs b/tests/run-coverage/while_early_ret.rs
new file mode 100644
index 000000000..1c83c8fc7
--- /dev/null
+++ b/tests/run-coverage/while_early_ret.rs
@@ -0,0 +1,42 @@
+#![allow(unused_assignments)]
+// failure-status: 1
+
+fn main() -> Result<(),u8> {
+ let mut countdown = 10;
+ while
+ countdown
+ >
+ 0
+ {
+ if
+ countdown
+ <
+ 5
+ {
+ return
+ if
+ countdown
+ >
+ 8
+ {
+ Ok(())
+ }
+ else
+ {
+ Err(1)
+ }
+ ;
+ }
+ countdown
+ -=
+ 1
+ ;
+ }
+ Ok(())
+}
+
+// ISSUE(77553): Originally, this test had `Err(1)` on line 22 (instead of `Ok(())`) and
+// `std::process::exit(2)` on line 26 (instead of `Err(1)`); and this worked as expected on Linux
+// and MacOS. But on Windows (MSVC, at least), the call to `std::process::exit()` exits the program
+// without saving the InstrProf coverage counters. The use of `std::process:exit()` is not critical
+// to the coverage test for early returns, but this is a limitation that should be fixed.
diff --git a/tests/run-coverage/yield.coverage b/tests/run-coverage/yield.coverage
new file mode 100644
index 000000000..6e2f23ee7
--- /dev/null
+++ b/tests/run-coverage/yield.coverage
@@ -0,0 +1,38 @@
+ 1| |#![feature(generators, generator_trait)]
+ 2| |#![allow(unused_assignments)]
+ 3| |
+ 4| |use std::ops::{Generator, GeneratorState};
+ 5| |use std::pin::Pin;
+ 6| |
+ 7| 1|fn main() {
+ 8| 1| let mut generator = || {
+ 9| 1| yield 1;
+ 10| 1| return "foo"
+ 11| 1| };
+ 12| |
+ 13| 1| match Pin::new(&mut generator).resume(()) {
+ 14| 1| GeneratorState::Yielded(1) => {}
+ 15| 0| _ => panic!("unexpected value from resume"),
+ 16| | }
+ 17| 1| match Pin::new(&mut generator).resume(()) {
+ 18| 1| GeneratorState::Complete("foo") => {}
+ 19| 0| _ => panic!("unexpected value from resume"),
+ 20| | }
+ 21| |
+ 22| 1| let mut generator = || {
+ 23| 1| yield 1;
+ 24| 1| yield 2;
+ 25| 0| yield 3;
+ 26| 0| return "foo"
+ 27| 0| };
+ 28| |
+ 29| 1| match Pin::new(&mut generator).resume(()) {
+ 30| 1| GeneratorState::Yielded(1) => {}
+ 31| 0| _ => panic!("unexpected value from resume"),
+ 32| | }
+ 33| 1| match Pin::new(&mut generator).resume(()) {
+ 34| 1| GeneratorState::Yielded(2) => {}
+ 35| 0| _ => panic!("unexpected value from resume"),
+ 36| | }
+ 37| 1|}
+
diff --git a/tests/run-coverage/yield.rs b/tests/run-coverage/yield.rs
new file mode 100644
index 000000000..ff7616656
--- /dev/null
+++ b/tests/run-coverage/yield.rs
@@ -0,0 +1,37 @@
+#![feature(generators, generator_trait)]
+#![allow(unused_assignments)]
+
+use std::ops::{Generator, GeneratorState};
+use std::pin::Pin;
+
+fn main() {
+ let mut generator = || {
+ yield 1;
+ return "foo"
+ };
+
+ match Pin::new(&mut generator).resume(()) {
+ GeneratorState::Yielded(1) => {}
+ _ => panic!("unexpected value from resume"),
+ }
+ match Pin::new(&mut generator).resume(()) {
+ GeneratorState::Complete("foo") => {}
+ _ => panic!("unexpected value from resume"),
+ }
+
+ let mut generator = || {
+ yield 1;
+ yield 2;
+ yield 3;
+ return "foo"
+ };
+
+ match Pin::new(&mut generator).resume(()) {
+ GeneratorState::Yielded(1) => {}
+ _ => panic!("unexpected value from resume"),
+ }
+ match Pin::new(&mut generator).resume(()) {
+ GeneratorState::Yielded(2) => {}
+ _ => panic!("unexpected value from resume"),
+ }
+}