Struct rustc_codegen_llvm::coverageinfo::CrateCoverageContext

pub(crate) struct CrateCoverageContext<'ll, 'tcx> {
    pub(crate) function_coverage_map: RefCell<FxIndexMap<Instance<'tcx>, FunctionCoverageCollector<'tcx>>>,
    pub(crate) pgo_func_name_var_map: RefCell<FxHashMap<Instance<'tcx>, &'ll Value>>,
    pub(crate) mcdc_condition_bitmap_map: RefCell<FxHashMap<Instance<'tcx>, Vec<&'ll Value>>>,
}

A context object for maintaining all state needed by the coverageinfo module.

Fields

function_coverage_map: RefCell<FxIndexMap<Instance<'tcx>, FunctionCoverageCollector<'tcx>>>

Coverage data for each instrumented function identified by DefId.

pgo_func_name_var_map: RefCell<FxHashMap<Instance<'tcx>, &'ll Value>>

mcdc_condition_bitmap_map: RefCell<FxHashMap<Instance<'tcx>, Vec<&'ll Value>>>

Implementations

impl<'ll, 'tcx> CrateCoverageContext<'ll, 'tcx>

pub(crate) fn new() -> Self

fn take_function_coverage_map( &self, ) -> FxIndexMap<Instance<'tcx>, FunctionCoverageCollector<'tcx>>

fn try_get_mcdc_condition_bitmap( &self, instance: &Instance<'tcx>, decision_depth: u16, ) -> Option<&'ll Value>

LLVM use a temp value to record evaluated mcdc test vector of each decision, which is called condition bitmap. In order to handle nested decisions, several condition bitmaps can be allocated for a function body. These values are named mcdc.addr.{i} and are a 32-bit integers. They respectively hold the condition bitmaps for decisions with a depth of i.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 144 bytes