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coverage. Generate Mappings of decisions and conditions for MC/DC

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This commit is contained in:
zhuyunxing 2024-04-19 10:53:04 +08:00
parent 68f86381ee
commit cf6b6cb2b4
10 changed files with 779 additions and 41 deletions
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94
compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp
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@ -4,8 +4,6 @@
#include "llvm/ProfileData/Coverage/CoverageMappingWriter.h"
#include "llvm/ProfileData/InstrProf.h"
#include <iostream>
using namespace llvm;
// FFI equivalent of enum `llvm::coverage::Counter::CounterKind`
@ -43,6 +41,8 @@ enum class LLVMRustCounterMappingRegionKind {
SkippedRegion = 2,
GapRegion = 3,
BranchRegion = 4,
MCDCDecisionRegion = 5,
MCDCBranchRegion = 6
};
static coverage::CounterMappingRegion::RegionKind
@ -58,15 +58,102 @@ fromRust(LLVMRustCounterMappingRegionKind Kind) {
return coverage::CounterMappingRegion::GapRegion;
case LLVMRustCounterMappingRegionKind::BranchRegion:
return coverage::CounterMappingRegion::BranchRegion;
#if LLVM_VERSION_GE(18, 0)
case LLVMRustCounterMappingRegionKind::MCDCDecisionRegion:
return coverage::CounterMappingRegion::MCDCDecisionRegion;
case LLVMRustCounterMappingRegionKind::MCDCBranchRegion:
return coverage::CounterMappingRegion::MCDCBranchRegion;
#else
case LLVMRustCounterMappingRegionKind::MCDCDecisionRegion:
break;
case LLVMRustCounterMappingRegionKind::MCDCBranchRegion:
break;
#endif
}
report_fatal_error("Bad LLVMRustCounterMappingRegionKind!");
}
enum LLVMRustMCDCParametersTag {
None = 0,
Decision = 1,
Branch = 2,
};
struct LLVMRustMCDCDecisionParameters {
uint32_t BitmapIdx;
uint16_t NumConditions;
};
struct LLVMRustMCDCBranchParameters {
int16_t ConditionID;
int16_t ConditionIDs[2];
};
struct LLVMRustMCDCParameters {
LLVMRustMCDCParametersTag Tag;
LLVMRustMCDCDecisionParameters DecisionParameters;
LLVMRustMCDCBranchParameters BranchParameters;
};
// LLVM representations for `MCDCParameters` evolved from LLVM 18 to 19.
// Look at representations in 18
// https://github.com/rust-lang/llvm-project/blob/66a2881a/llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h#L253-L263
// and representations in 19
// https://github.com/llvm/llvm-project/blob/843cc474faefad1d639f4c44c1cf3ad7dbda76c8/llvm/include/llvm/ProfileData/Coverage/MCDCTypes.h
#if LLVM_VERSION_GE(18, 0) && LLVM_VERSION_LT(19, 0)
static coverage::CounterMappingRegion::MCDCParameters
fromRust(LLVMRustMCDCParameters Params) {
auto parameter = coverage::CounterMappingRegion::MCDCParameters{};
switch (Params.Tag) {
case LLVMRustMCDCParametersTag::None:
return parameter;
case LLVMRustMCDCParametersTag::Decision:
parameter.BitmapIdx =
static_cast<unsigned>(Params.DecisionParameters.BitmapIdx),
parameter.NumConditions =
static_cast<unsigned>(Params.DecisionParameters.NumConditions);
return parameter;
case LLVMRustMCDCParametersTag::Branch:
parameter.ID = static_cast<coverage::CounterMappingRegion::MCDCConditionID>(
Params.BranchParameters.ConditionID),
parameter.FalseID =
static_cast<coverage::CounterMappingRegion::MCDCConditionID>(
Params.BranchParameters.ConditionIDs[0]),
parameter.TrueID =
static_cast<coverage::CounterMappingRegion::MCDCConditionID>(
Params.BranchParameters.ConditionIDs[1]);
return parameter;
}
report_fatal_error("Bad LLVMRustMCDCParametersTag!");
}
#elif LLVM_VERSION_GE(19, 0)
static coverage::mcdc::Parameters fromRust(LLVMRustMCDCParameters Params) {
switch (Params.Tag) {
case LLVMRustMCDCParametersTag::None:
return std::monostate();
case LLVMRustMCDCParametersTag::Decision:
return coverage::mcdc::DecisionParameters(
Params.DecisionParameters.BitmapIdx,
Params.DecisionParameters.NumConditions);
case LLVMRustMCDCParametersTag::Branch:
return coverage::mcdc::BranchParameters(
static_cast<coverage::mcdc::ConditionID>(
Params.BranchParameters.ConditionID),
{static_cast<coverage::mcdc::ConditionID>(
Params.BranchParameters.ConditionIDs[0]),
static_cast<coverage::mcdc::ConditionID>(
Params.BranchParameters.ConditionIDs[1])});
}
report_fatal_error("Bad LLVMRustMCDCParametersTag!");
}
#endif
// FFI equivalent of struct `llvm::coverage::CounterMappingRegion`
// https://github.com/rust-lang/llvm-project/blob/ea6fa9c2/llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h#L211-L304
struct LLVMRustCounterMappingRegion {
LLVMRustCounter Count;
LLVMRustCounter FalseCount;
LLVMRustMCDCParameters MCDCParameters;
uint32_t FileID;
uint32_t ExpandedFileID;
uint32_t LineStart;
@ -135,7 +222,8 @@ extern "C" void LLVMRustCoverageWriteMappingToBuffer(
MappingRegions.emplace_back(
fromRust(Region.Count), fromRust(Region.FalseCount),
#if LLVM_VERSION_GE(18, 0) && LLVM_VERSION_LT(19, 0)
coverage::CounterMappingRegion::MCDCParameters{},
// LLVM 19 may move this argument to last.
fromRust(Region.MCDCParameters),
#endif
Region.FileID, Region.ExpandedFileID, // File IDs, then region info.
Region.LineStart, Region.ColumnStart, Region.LineEnd, Region.ColumnEnd,