diff options
| author | Zalathar <Zalathar@users.noreply.github.com> | 2023-08-14 13:00:28 +1000 |
|---|---|---|
| committer | Zalathar <Zalathar@users.noreply.github.com> | 2023-09-05 11:55:17 +1000 |
| commit | 004db4728bc6ccc62416f93ba6473b144def7fe8 (patch) | |
| tree | 93e40b740d55ec9ba1415c06df31af97da7e32ae /src/bootstrap | |
| parent | 1367104cb22ba5e9f8bc95c7bc719a12dc80d2c6 (diff) | |
Add test suite `coverage-map` to test coverage mappings emitted by LLVM
We compile each test file to LLVM IR assembly, and then pass that IR to a dedicated program that can decode LLVM coverage maps and print them in a more human-readable format. We can then check that output against known-good snapshots. This test suite has some advantages over the existing `run-coverage` tests: - We can test coverage instrumentation without needing to run target binaries. - We can observe subtle improvements/regressions in the underlying coverage mappings that don't make a visible difference to coverage reports.
Diffstat (limited to 'src/bootstrap')
| -rw-r--r-- | src/bootstrap/builder.rs | 1 | ||||
| -rw-r--r-- | src/bootstrap/test.rs | 14 |
2 files changed, 15 insertions, 0 deletions
diff --git a/src/bootstrap/builder.rs b/src/bootstrap/builder.rs index 73c0a192cef..a24a6a4636d 100644 --- a/src/bootstrap/builder.rs +++ b/src/bootstrap/builder.rs @@ -726,6 +726,7 @@ impl<'a> Builder<'a> { test::Tidy, test::Ui, test::RunPassValgrind, + test::CoverageMap, test::RunCoverage, test::MirOpt, test::Codegen, diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs index d1018978f78..d78e0deda69 100644 --- a/src/bootstrap/test.rs +++ b/src/bootstrap/test.rs @@ -1340,6 +1340,12 @@ host_test!(RunMakeFullDeps { default_test!(Assembly { path: "tests/assembly", mode: "assembly", suite: "assembly" }); +default_test!(CoverageMap { + path: "tests/coverage-map", + mode: "coverage-map", + suite: "coverage-map" +}); + host_test!(RunCoverage { path: "tests/run-coverage", mode: "run-coverage", suite: "run-coverage" }); host_test!(RunCoverageRustdoc { path: "tests/run-coverage-rustdoc", @@ -1545,6 +1551,14 @@ note: if you're sure you want to do this, please open an issue as to why. In the .arg(builder.ensure(tool::JsonDocLint { compiler: json_compiler, target })); } + if mode == "coverage-map" { + let coverage_dump = builder.ensure(tool::CoverageDump { + compiler: compiler.with_stage(0), + target: compiler.host, + }); + cmd.arg("--coverage-dump-path").arg(coverage_dump); + } + if mode == "run-make" || mode == "run-coverage" { let rust_demangler = builder .ensure(tool::RustDemangler { |