| $DIR/auxiliary/used_crate.rs: |
| LL| |#![allow(unused_assignments, unused_variables)] |
| LL| |// Verify that coverage works with optimizations: |
| LL| |//@ compile-flags: -C opt-level=3 |
| LL| | |
| LL| |use std::fmt::Debug; |
| LL| | |
| LL| 1|pub fn used_function() { |
| LL| 1| // Initialize test constants in a way that cannot be determined at compile time, to ensure |
| LL| 1| // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from |
| LL| 1| // dependent conditions. |
| LL| 1| let is_true = std::env::args().len() == 1; |
| LL| 1| let mut countdown = 0; |
| LL| 1| if is_true { |
| LL| 1| countdown = 10; |
| LL| 1| } |
| ^0 |
| LL| 1| use_this_lib_crate(); |
| LL| 1|} |
| LL| | |
| LL| 2|pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) { |
| LL| 2| println!("used_only_from_bin_crate_generic_function with {arg:?}"); |
| LL| 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>>: |
| | LL| 1|pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) { |
| | LL| 1| println!("used_only_from_bin_crate_generic_function with {arg:?}"); |
| | LL| 1|} |
| ------------------ |
| | used_crate::used_only_from_bin_crate_generic_function::<&str>: |
| | LL| 1|pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) { |
| | LL| 1| println!("used_only_from_bin_crate_generic_function with {arg:?}"); |
| | LL| 1|} |
| ------------------ |
| LL| |// Expect for above function: `Unexecuted instantiation` (see below) |
| LL| 2|pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) { |
| LL| 2| println!("used_only_from_this_lib_crate_generic_function with {arg:?}"); |
| LL| 2|} |
| ------------------ |
| | used_crate::used_only_from_this_lib_crate_generic_function::<&str>: |
| | LL| 1|pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) { |
| | LL| 1| println!("used_only_from_this_lib_crate_generic_function with {arg:?}"); |
| | LL| 1|} |
| ------------------ |
| | used_crate::used_only_from_this_lib_crate_generic_function::<alloc::vec::Vec<i32>>: |
| | LL| 1|pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) { |
| | LL| 1| println!("used_only_from_this_lib_crate_generic_function with {arg:?}"); |
| | LL| 1|} |
| ------------------ |
| LL| | |
| LL| 2|pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) { |
| LL| 2| println!("used_from_bin_crate_and_lib_crate_generic_function with {arg:?}"); |
| LL| 2|} |
| ------------------ |
| | used_crate::used_from_bin_crate_and_lib_crate_generic_function::<&str>: |
| | LL| 1|pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) { |
| | LL| 1| println!("used_from_bin_crate_and_lib_crate_generic_function with {arg:?}"); |
| | LL| 1|} |
| ------------------ |
| | used_crate::used_from_bin_crate_and_lib_crate_generic_function::<alloc::vec::Vec<i32>>: |
| | LL| 1|pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) { |
| | LL| 1| println!("used_from_bin_crate_and_lib_crate_generic_function with {arg:?}"); |
| | LL| 1|} |
| ------------------ |
| LL| | |
| LL| 2|pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) { |
| LL| 2| println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {arg:?}"); |
| LL| 2|} |
| ------------------ |
| | used_crate::used_with_same_type_from_bin_crate_and_lib_crate_generic_function::<&str>: |
| | LL| 1|pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) { |
| | LL| 1| println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {arg:?}"); |
| | LL| 1|} |
| ------------------ |
| | used_crate::used_with_same_type_from_bin_crate_and_lib_crate_generic_function::<&str>: |
| | LL| 1|pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) { |
| | LL| 1| println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {arg:?}"); |
| | LL| 1|} |
| ------------------ |
| LL| | |
| LL| 0|pub fn unused_generic_function<T: Debug>(arg: T) { |
| LL| 0| println!("unused_generic_function with {arg:?}"); |
| LL| 0|} |
| LL| | |
| LL| 0|pub fn unused_function() { |
| LL| 0| let is_true = std::env::args().len() == 1; |
| LL| 0| let mut countdown = 2; |
| LL| 0| if !is_true { |
| LL| 0| countdown = 20; |
| LL| 0| } |
| LL| 0|} |
| LL| | |
| LL| |#[allow(dead_code)] |
| LL| 0|fn unused_private_function() { |
| LL| 0| let is_true = std::env::args().len() == 1; |
| LL| 0| let mut countdown = 2; |
| LL| 0| if !is_true { |
| LL| 0| countdown = 20; |
| LL| 0| } |
| LL| 0|} |
| LL| | |
| LL| 1|fn use_this_lib_crate() { |
| LL| 1| used_from_bin_crate_and_lib_crate_generic_function("used from library used_crate.rs"); |
| LL| 1| used_with_same_type_from_bin_crate_and_lib_crate_generic_function( |
| LL| 1| "used from library used_crate.rs", |
| LL| 1| ); |
| LL| 1| let some_vec = vec![5, 6, 7, 8]; |
| LL| 1| used_only_from_this_lib_crate_generic_function(some_vec); |
| LL| 1| used_only_from_this_lib_crate_generic_function("used ONLY from library used_crate.rs"); |
| LL| 1|} |
| LL| | |
| LL| |// FIXME(#79651): "Unexecuted instantiation" errors appear in coverage results, |
| LL| |// for example: |
| LL| |// |
| LL| |// | Unexecuted instantiation: used_crate::used_only_from_bin_crate_generic_function::<_> |
| LL| |// |
| LL| |// These notices appear when `llvm-cov` shows instantiations. This may be a |
| LL| |// default option, but it can be suppressed with: |
| LL| |// |
| LL| |// ```shell |
| LL| |// $ `llvm-cov show --show-instantiations=0 ...` |
| LL| |// ``` |
| LL| |// |
| LL| |// The notice is triggered because the function is unused by the library itself, |
| LL| |// so when the library is compiled, an "unused" set of mappings for that function |
| LL| |// is included in the library's coverage metadata. |
| LL| |// |
| LL| |// Even though this function is used by `uses_crate.rs` (and |
| LL| |// counted), with substitutions for `T`, those instantiations are only generated |
| LL| |// when the generic function is actually used (from the binary, not from this |
| LL| |// library crate). So the test result shows coverage for all instantiated |
| LL| |// versions and their generic type substitutions, plus the `Unexecuted |
| LL| |// instantiation` message for the non-substituted version. This is valid, but |
| LL| |// unfortunately a little confusing. |
| LL| |// |
| LL| |// The library crate has its own coverage map, and the only way to show unused |
| LL| |// coverage of a generic function is to include the generic function in the |
| LL| |// coverage map, marked as an "unused function". If the library were used by |
| LL| |// another binary that never used this generic function, then it would be valid |
| LL| |// to show the unused generic, with unknown substitution (`_`). |
| LL| |// |
| LL| |// The alternative would be to exclude all generics from being included in the |
| LL| |// "unused functions" list, which would then omit coverage results for |
| LL| |// `unused_generic_function<T>()`. |
| |
| $DIR/uses_crate.rs: |
| LL| |// This test was failing on Linux for a while due to #110393 somehow making |
| LL| |// the unused functions not instrumented, but it seems to be fine now. |
| LL| | |
| LL| |// Validates coverage now works with optimizations |
| LL| |//@ compile-flags: -C opt-level=3 |
| LL| | |
| LL| |#![allow(unused_assignments, unused_variables)] |
| LL| | |
| LL| |//@ aux-build:used_crate.rs |
| LL| |extern crate used_crate; |
| LL| | |
| LL| 1|fn main() { |
| LL| 1| used_crate::used_function(); |
| LL| 1| let some_vec = vec![1, 2, 3, 4]; |
| LL| 1| used_crate::used_only_from_bin_crate_generic_function(&some_vec); |
| LL| 1| used_crate::used_only_from_bin_crate_generic_function("used from bin uses_crate.rs"); |
| LL| 1| used_crate::used_from_bin_crate_and_lib_crate_generic_function(some_vec); |
| LL| 1| used_crate::used_with_same_type_from_bin_crate_and_lib_crate_generic_function("interesting?"); |
| LL| 1|} |
| |
