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[llvm-cov] Export decision coverage to output json #144335

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Merged
merged 2 commits into from
Jun 18, 2025
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[llvm-cov] Export decision coverage to output json #144335

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cb87084
[llvm-cov] Export decision coverage to output json
Jun 16, 2025
75cef15
Move getDecisions to MCDCRecord
Jun 17, 2025
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12 changes: 12 additions & 0 deletions llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@
#include "llvm/Support/Endian.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <iterator>
Expand Down Expand Up @@ -494,6 +495,17 @@ struct MCDCRecord {
return TV[TestVectorIndex].first[PosToID[Condition]];
}

/// Return the number of True and False decisions for all executed test
/// vectors.
std::pair<unsigned, unsigned> getDecisions() const {
const unsigned TrueDecisions =
std::count_if(TV.begin(), TV.end(), [](const auto &TestVec) {
return TestVec.second == CondState::MCDC_True;
});

return {TrueDecisions, TV.size() - TrueDecisions};
}

/// Return the Result evaluation for an executed test vector.
/// See MCDCRecordProcessor::RecordTestVector().
CondState getTVResult(unsigned TestVectorIndex) {
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6 changes: 4 additions & 2 deletions llvm/tools/llvm-cov/CoverageExporterJson.cpp
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Expand Up @@ -62,7 +62,7 @@
#include <utility>

/// The semantic version combined as a string.
#define LLVM_COVERAGE_EXPORT_JSON_STR "2.0.1"
#define LLVM_COVERAGE_EXPORT_JSON_STR "3.0.0"
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Thank you for updating this. We have not been good about moving the version forward.

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This is actually very important to me, as I check this value to see whether the subsequent processing is still correct.


/// Unique type identifier for JSON coverage export.
#define LLVM_COVERAGE_EXPORT_JSON_TYPE_STR "llvm.coverage.json.export"
Expand Down Expand Up @@ -110,8 +110,10 @@ json::Array gatherConditions(const coverage::MCDCRecord &Record) {

json::Array renderMCDCRecord(const coverage::MCDCRecord &Record) {
const llvm::coverage::CounterMappingRegion &CMR = Record.getDecisionRegion();
const auto [TrueDecisions, FalseDecisions] = Record.getDecisions();
return json::Array({CMR.LineStart, CMR.ColumnStart, CMR.LineEnd,
CMR.ColumnEnd, CMR.ExpandedFileID, int64_t(CMR.Kind),
CMR.ColumnEnd, TrueDecisions, FalseDecisions,
CMR.ExpandedFileID, int64_t(CMR.Kind),
gatherConditions(Record)});
}

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