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rust/tests/coverage
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Zalathar eb2d4cb541 coverage: Skip spans that can't be un-expanded back to the function body 
When we extract coverage spans from MIR, we try to "un-expand" them back to
spans that are inside the function's body span.

In cases where that doesn't succeed, the current code just swaps in the entire
body span instead. But that tends to result in coverage spans that are
completely unrelated to the control flow of the affected code, so it's better
to just discard those spans.
2023-12-03 12:35:33 +11:00
..
auxiliary coverage: Regression test for #117788 2023-11-13 12:31:44 +11:00
abort.cov-map
abort.coverage
abort.rs
assert.cov-map
assert.coverage
assert.rs
async2.cov-map coverage: Skip spans that can't be un-expanded back to the function body 2023-12-03 12:35:33 +11:00
async2.coverage
async2.rs
async.cov-map coverage: Skip spans that can't be un-expanded back to the function body 2023-12-03 12:35:33 +11:00
async.coverage
async.rs
bad_counter_ids.cov-map
bad_counter_ids.coverage
bad_counter_ids.rs
closure_bug.cov-map
closure_bug.coverage
closure_bug.rs
closure_macro_async.cov-map
closure_macro_async.coverage
closure_macro_async.rs
closure_macro.cov-map
closure_macro.coverage
closure_macro.rs
closure.cov-map
closure.coverage
closure.rs
conditions.cov-map coverage: Simplify building coverage expressions based on sums 2023-11-25 12:29:20 +11:00
conditions.coverage
conditions.rs
continue.cov-map coverage: Simplify building coverage expressions based on sums 2023-11-25 12:29:20 +11:00
continue.coverage
continue.rs
coroutine.cov-map coverage: Simplify building coverage expressions based on sums 2023-11-25 12:29:20 +11:00
coroutine.coverage
coroutine.rs
dead_code.cov-map
dead_code.coverage
dead_code.rs
drop_trait.cov-map
drop_trait.coverage
drop_trait.rs
fn_sig_into_try.cov-map
fn_sig_into_try.coverage
fn_sig_into_try.rs
generics.cov-map
generics.coverage
generics.rs
if_else.cov-map
if_else.coverage
if_else.rs
if.cov-map
if.coverage
if.rs
inline-dead.cov-map
inline-dead.coverage
inline-dead.rs
inline.cov-map coverage: Skip spans that can't be un-expanded back to the function body 2023-12-03 12:35:33 +11:00
inline.coverage coverage: Skip spans that can't be un-expanded back to the function body 2023-12-03 12:35:33 +11:00
inline.rs
inner_items.cov-map
inner_items.coverage
inner_items.rs
issue-83601.cov-map
issue-83601.coverage
issue-83601.rs
issue-84561.cov-map
issue-84561.coverage
issue-84561.rs
issue-85461.cov-map
issue-85461.coverage
issue-85461.rs
issue-93054.cov-map
issue-93054.coverage
issue-93054.rs
lazy_boolean.cov-map
lazy_boolean.coverage
lazy_boolean.rs
long_and_wide.cov-map
long_and_wide.coverage
long_and_wide.rs
loop_break_value.cov-map
loop_break_value.coverage
loop_break_value.rs
loops_branches.cov-map coverage: Simplify building coverage expressions based on sums 2023-11-25 12:29:20 +11:00
loops_branches.coverage
loops_branches.rs
macro_name_span.cov-map coverage: Regression test for #117788 2023-11-13 12:31:44 +11:00
macro_name_span.coverage coverage: Regression test for #117788 2023-11-13 12:31:44 +11:00
macro_name_span.rs coverage: Regression test for #117788 2023-11-13 12:31:44 +11:00
match_or_pattern.cov-map
match_or_pattern.coverage
match_or_pattern.rs
nested_loops.cov-map
nested_loops.coverage
nested_loops.rs
no_cov_crate.cov-map
no_cov_crate.coverage
no_cov_crate.rs
overflow.cov-map
overflow.coverage
overflow.rs
panic_unwind.cov-map
panic_unwind.coverage
panic_unwind.rs
partial_eq.cov-map
partial_eq.coverage
partial_eq.rs
README.md coverage: Rename the run-coverage test mode to coverage-run 2023-11-08 16:41:24 +11:00
simple_loop.cov-map
simple_loop.coverage
simple_loop.rs
simple_match.cov-map
simple_match.coverage
simple_match.rs
sort_groups.cov-map
sort_groups.coverage
sort_groups.rs
test_harness.cov-map
test_harness.coverage
test_harness.rs
thin-lto.cov-map Add thinlto support to codegen, assembly and coverage tests 2023-11-30 18:48:03 +08:00
thin-lto.coverage Add thinlto support to codegen, assembly and coverage tests 2023-11-30 18:48:03 +08:00
thin-lto.rs Add thinlto support to codegen, assembly and coverage tests 2023-11-30 18:48:03 +08:00
tight_inf_loop.cov-map
tight_inf_loop.coverage
tight_inf_loop.rs
trivial.cov-map
trivial.coverage
trivial.rs
try_error_result.cov-map coverage: Simplify building coverage expressions based on sums 2023-11-25 12:29:20 +11:00
try_error_result.coverage
try_error_result.rs
unreachable.cov-map coverage: Skip spans that can't be un-expanded back to the function body 2023-12-03 12:35:33 +11:00
unreachable.coverage coverage: Skip spans that can't be un-expanded back to the function body 2023-12-03 12:35:33 +11:00
unreachable.rs
unused_mod.cov-map
unused_mod.coverage
unused_mod.rs
unused.cov-map
unused.coverage
unused.rs
uses_crate.cov-map
uses_crate.coverage
uses_crate.rs
uses_inline_crate.cov-map
uses_inline_crate.coverage
uses_inline_crate.rs
while_early_ret.cov-map
while_early_ret.coverage
while_early_ret.rs
while.cov-map
while.coverage
while.rs
yield.cov-map
yield.coverage
yield.rs

README.md

The tests in this directory are shared by two different test modes, and can be run in multiple different ways:

  • ./x.py test coverage-map (compiles to LLVM IR and checks coverage mappings)
  • ./x.py test coverage-run (runs a test binary and checks its coverage report)
  • ./x.py test coverage (runs both coverage-map and coverage-run)

Maintenance note

These tests can be sensitive to small changes in MIR spans or MIR control flow, especially in HIR-to-MIR lowering or MIR optimizations.

If you haven't touched the coverage code directly, and the tests still pass in coverage-run mode, then it should usually be OK to just re-bless the mappings as necessary with ./x.py test coverage-map --bless, without worrying too much about the exact changes.