d93df5775c
Add support for LLVM coverage mapping format versions 5 and 6 This PR cherry-pick's Swatinem's initial commit in unsubmitted PR #90047. My additional commit augments Swatinem's great starting point, but adds full support for LLVM Coverage Mapping Format version 6, conditionally, if compiling with LLVM 13. Version 6 requires adding the compilation directory when file paths are relative, and since Rustc coverage maps use relative paths, we should add the expected compilation directory entry. Note, however, that with the compilation directory, coverage reports from `llvm-cov show` can now report file names (when the report includes more than one file) with the full absolute path to the file. This would be a problem for test results, but the workaround (for the rust coverage tests) is to include an additional `llvm-cov show` parameter: `--compilation-dir=.` |
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| .. | ||
| .editorconfig | ||
| ArchiveWrapper.cpp | ||
| CoverageMappingWrapper.cpp | ||
| Linker.cpp | ||
| LLVMWrapper.h | ||
| PassWrapper.cpp | ||
| README | ||
| RustWrapper.cpp | ||
This directory currently contains some LLVM support code. This will generally be sent upstream to LLVM in time; for now it lives here. NOTE: the LLVM C++ ABI is subject to between-version breakage and must *never* be exposed to Rust. To allow for easy auditing of that, all Rust-exposed types must be typedef-ed as "LLVMXyz", or "LLVMRustXyz" if they were defined here. Functions that return a failure status and leave the error in the LLVM last error should return an LLVMRustResult rather than an int or anything to avoid confusion. When translating enums, add a single `Other` variant as the first one to allow for new variants to be added. It should abort when used as an input. All other types must not be typedef-ed as such.