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| author | Rich Kadel <richkadel@google.com> | 2021-04-25 13:34:03 -0700 |
|---|---|---|
| committer | Rich Kadel <richkadel@google.com> | 2021-04-27 11:11:56 -0700 |
| commit | 888d0b4c9691ffcba7cb326a1cd1fc73feb38f57 (patch) | |
| tree | f9fd7d1e8afa1f610aab6081b1bf06a1de3edf75 /compiler/rustc_mir/src/transform/coverage/debug.rs | |
| parent | 1919b3f22706fee0b2c6ac3d42316545900b7734 (diff) | |
| download | rust-888d0b4c9691ffcba7cb326a1cd1fc73feb38f57.tar.gz rust-888d0b4c9691ffcba7cb326a1cd1fc73feb38f57.zip | |
Derived Eq no longer shows uncovered
The Eq trait has a special hidden function. MIR `InstrumentCoverage` would add this function to the coverage map, but it is never called, so the `Eq` trait would always appear uncovered. Fixes: #83601 The fix required creating a new function attribute `no_coverage` to mark functions that should be ignored by `InstrumentCoverage` and the coverage `mapgen` (during codegen). While testing, I also noticed two other issues: * spanview debug file output ICEd on a function with no body. The workaround for this is included in this PR. * `assert_*!()` macro coverage can appear covered if followed by another `assert_*!()` macro. Normally they appear uncovered. I submitted a new Issue #84561, and added a coverage test to demonstrate this issue.
Diffstat (limited to 'compiler/rustc_mir/src/transform/coverage/debug.rs')
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