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Diffstat (limited to 'tests/run-coverage/uses_crate.coverage')
| -rw-r--r-- | tests/run-coverage/uses_crate.coverage | 170 |
1 files changed, 170 insertions, 0 deletions
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|} + |