Module mapgen 

Re-exports

use std::assert_matches; 🔒

use itertools::Itertools; 🔒

use rustc_abi::Align; 🔒

use rustc_codegen_ssa::traits::BaseTypeCodegenMethods; 🔒

use rustc_codegen_ssa::traits::ConstCodegenMethods; 🔒

use rustc_data_structures::fx::FxIndexMap; 🔒

use rustc_middle::ty::TyCtxt; 🔒

use rustc_span::FileName; 🔒

use rustc_span::RemapPathScopeComponents; 🔒

use rustc_span::SourceFile; 🔒

use rustc_span::StableSourceFileId; 🔒

use tracing::debug; 🔒

use crate::common::CodegenCx; 🔒

use crate::coverageinfo::llvm_cov; 🔒

use crate::coverageinfo::mapgen::covfun::prepare_covfun_record; 🔒

use crate::llvm; 🔒

use crate::macros::TryFromU32; 🔒

Modules

covfun 🔒

For each function that was instrumented for coverage, we need to embed its corresponding coverage mapping metadata inside the __llvm_covfun linker section of the final binary.

spans 🔒

unused 🔒

Structs

GlobalFileId 🔒

An index into the CGU’s overall list of file paths. The underlying paths will be embedded in the __llvm_covmap linker section.

GlobalFileTable 🔒

Maps “global” (per-CGU) file ID numbers to their underlying source file paths.

LocalFileId 🔒

An index into a function’s list of global file IDs. That underlying list of local-to-global mappings will be embedded in the function’s record in the __llvm_covfun linker section.

Enums

CovmapVersion 🔒

Version number that will be included the __llvm_covmap section header. Corresponds to LLVM’s llvm::coverage::CovMapVersion (in CoverageMapping.h), or at least the subset that we know and care about.

Functions

emit_covmap_record 🔒

Generates and emits the covmap record for this CGU, which mostly consists of a header and a list of filenames. The record is emitted as a global variable in the __llvm_covmap section.

finalize 🔒

Generates and exports the coverage map, which is embedded in special linker sections in the final binary.