mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-25 16:29:20 +00:00
aacc919bfd
If we have multiple coverage counts for the same segment, we need to add them up rather than arbitrarily choosing one. This fixes that and adds a test with template instantiations to exercise it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218432 91177308-0d34-0410-b5e6-96231b3b80d8
446 lines
15 KiB
C++
446 lines
15 KiB
C++
//=-- CoverageMapping.cpp - Code coverage mapping support ---------*- C++ -*-=//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains support for clang's and llvm's instrumentation based
|
|
// code coverage.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ProfileData/CoverageMapping.h"
|
|
|
|
#include "llvm/ADT/DenseMap.h"
|
|
#include "llvm/ADT/Optional.h"
|
|
#include "llvm/ADT/SmallSet.h"
|
|
#include "llvm/ProfileData/CoverageMappingReader.h"
|
|
#include "llvm/ProfileData/InstrProfReader.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
|
|
using namespace llvm;
|
|
using namespace coverage;
|
|
|
|
#define DEBUG_TYPE "coverage-mapping"
|
|
|
|
CounterExpressionBuilder::CounterExpressionBuilder(unsigned NumCounterValues) {
|
|
Terms.resize(NumCounterValues);
|
|
}
|
|
|
|
Counter CounterExpressionBuilder::get(const CounterExpression &E) {
|
|
for (unsigned I = 0, S = Expressions.size(); I < S; ++I) {
|
|
if (Expressions[I] == E)
|
|
return Counter::getExpression(I);
|
|
}
|
|
Expressions.push_back(E);
|
|
return Counter::getExpression(Expressions.size() - 1);
|
|
}
|
|
|
|
void CounterExpressionBuilder::extractTerms(Counter C, int Sign) {
|
|
switch (C.getKind()) {
|
|
case Counter::Zero:
|
|
break;
|
|
case Counter::CounterValueReference:
|
|
Terms[C.getCounterID()] += Sign;
|
|
break;
|
|
case Counter::Expression:
|
|
const auto &E = Expressions[C.getExpressionID()];
|
|
extractTerms(E.LHS, Sign);
|
|
extractTerms(E.RHS, E.Kind == CounterExpression::Subtract ? -Sign : Sign);
|
|
break;
|
|
}
|
|
}
|
|
|
|
Counter CounterExpressionBuilder::simplify(Counter ExpressionTree) {
|
|
// Gather constant terms.
|
|
for (auto &I : Terms)
|
|
I = 0;
|
|
extractTerms(ExpressionTree);
|
|
|
|
Counter C;
|
|
// Create additions.
|
|
// Note: the additions are created first
|
|
// to avoid creation of a tree like ((0 - X) + Y) instead of (Y - X).
|
|
for (unsigned I = 0, S = Terms.size(); I < S; ++I) {
|
|
if (Terms[I] <= 0)
|
|
continue;
|
|
for (int J = 0; J < Terms[I]; ++J) {
|
|
if (C.isZero())
|
|
C = Counter::getCounter(I);
|
|
else
|
|
C = get(CounterExpression(CounterExpression::Add, C,
|
|
Counter::getCounter(I)));
|
|
}
|
|
}
|
|
|
|
// Create subtractions.
|
|
for (unsigned I = 0, S = Terms.size(); I < S; ++I) {
|
|
if (Terms[I] >= 0)
|
|
continue;
|
|
for (int J = 0; J < (-Terms[I]); ++J)
|
|
C = get(CounterExpression(CounterExpression::Subtract, C,
|
|
Counter::getCounter(I)));
|
|
}
|
|
return C;
|
|
}
|
|
|
|
Counter CounterExpressionBuilder::add(Counter LHS, Counter RHS) {
|
|
return simplify(get(CounterExpression(CounterExpression::Add, LHS, RHS)));
|
|
}
|
|
|
|
Counter CounterExpressionBuilder::subtract(Counter LHS, Counter RHS) {
|
|
return simplify(
|
|
get(CounterExpression(CounterExpression::Subtract, LHS, RHS)));
|
|
}
|
|
|
|
void CounterMappingContext::dump(const Counter &C,
|
|
llvm::raw_ostream &OS) const {
|
|
switch (C.getKind()) {
|
|
case Counter::Zero:
|
|
OS << '0';
|
|
return;
|
|
case Counter::CounterValueReference:
|
|
OS << '#' << C.getCounterID();
|
|
break;
|
|
case Counter::Expression: {
|
|
if (C.getExpressionID() >= Expressions.size())
|
|
return;
|
|
const auto &E = Expressions[C.getExpressionID()];
|
|
OS << '(';
|
|
dump(E.LHS, OS);
|
|
OS << (E.Kind == CounterExpression::Subtract ? " - " : " + ");
|
|
dump(E.RHS, OS);
|
|
OS << ')';
|
|
break;
|
|
}
|
|
}
|
|
if (CounterValues.empty())
|
|
return;
|
|
ErrorOr<int64_t> Value = evaluate(C);
|
|
if (!Value)
|
|
return;
|
|
OS << '[' << *Value << ']';
|
|
}
|
|
|
|
ErrorOr<int64_t> CounterMappingContext::evaluate(const Counter &C) const {
|
|
switch (C.getKind()) {
|
|
case Counter::Zero:
|
|
return 0;
|
|
case Counter::CounterValueReference:
|
|
if (C.getCounterID() >= CounterValues.size())
|
|
return std::make_error_code(std::errc::argument_out_of_domain);
|
|
return CounterValues[C.getCounterID()];
|
|
case Counter::Expression: {
|
|
if (C.getExpressionID() >= Expressions.size())
|
|
return std::make_error_code(std::errc::argument_out_of_domain);
|
|
const auto &E = Expressions[C.getExpressionID()];
|
|
ErrorOr<int64_t> LHS = evaluate(E.LHS);
|
|
if (!LHS)
|
|
return LHS;
|
|
ErrorOr<int64_t> RHS = evaluate(E.RHS);
|
|
if (!RHS)
|
|
return RHS;
|
|
return E.Kind == CounterExpression::Subtract ? *LHS - *RHS : *LHS + *RHS;
|
|
}
|
|
}
|
|
llvm_unreachable("Unhandled CounterKind");
|
|
}
|
|
|
|
ErrorOr<std::unique_ptr<CoverageMapping>>
|
|
CoverageMapping::load(ObjectFileCoverageMappingReader &CoverageReader,
|
|
IndexedInstrProfReader &ProfileReader) {
|
|
auto Coverage = std::unique_ptr<CoverageMapping>(new CoverageMapping());
|
|
|
|
std::vector<uint64_t> Counts;
|
|
for (const auto &Record : CoverageReader) {
|
|
Counts.clear();
|
|
if (std::error_code EC = ProfileReader.getFunctionCounts(
|
|
Record.FunctionName, Record.FunctionHash, Counts)) {
|
|
if (EC != instrprof_error::hash_mismatch &&
|
|
EC != instrprof_error::unknown_function)
|
|
return EC;
|
|
Coverage->MismatchedFunctionCount++;
|
|
continue;
|
|
}
|
|
|
|
FunctionRecord Function(Record.FunctionName, Record.Filenames);
|
|
CounterMappingContext Ctx(Record.Expressions, Counts);
|
|
for (const auto &Region : Record.MappingRegions) {
|
|
ErrorOr<int64_t> ExecutionCount = Ctx.evaluate(Region.Count);
|
|
if (!ExecutionCount)
|
|
break;
|
|
Function.CountedRegions.push_back(CountedRegion(Region, *ExecutionCount));
|
|
}
|
|
if (Function.CountedRegions.size() != Record.MappingRegions.size()) {
|
|
Coverage->MismatchedFunctionCount++;
|
|
continue;
|
|
}
|
|
|
|
Coverage->Functions.push_back(Function);
|
|
}
|
|
|
|
return std::move(Coverage);
|
|
}
|
|
|
|
ErrorOr<std::unique_ptr<CoverageMapping>>
|
|
CoverageMapping::load(StringRef ObjectFilename, StringRef ProfileFilename) {
|
|
auto CounterMappingBuff = MemoryBuffer::getFileOrSTDIN(ObjectFilename);
|
|
if (auto EC = CounterMappingBuff.getError())
|
|
return EC;
|
|
ObjectFileCoverageMappingReader CoverageReader(CounterMappingBuff.get());
|
|
if (auto EC = CoverageReader.readHeader())
|
|
return EC;
|
|
std::unique_ptr<IndexedInstrProfReader> ProfileReader;
|
|
if (auto EC = IndexedInstrProfReader::create(ProfileFilename, ProfileReader))
|
|
return EC;
|
|
return load(CoverageReader, *ProfileReader);
|
|
}
|
|
|
|
namespace {
|
|
/// \brief Distributes functions into instantiation sets.
|
|
///
|
|
/// An instantiation set is a collection of functions that have the same source
|
|
/// code, ie, template functions specializations.
|
|
class FunctionInstantiationSetCollector {
|
|
typedef DenseMap<std::pair<unsigned, unsigned>,
|
|
std::vector<const FunctionRecord *>> MapT;
|
|
MapT InstantiatedFunctions;
|
|
|
|
public:
|
|
void insert(const FunctionRecord &Function, unsigned FileID) {
|
|
auto I = Function.CountedRegions.begin(), E = Function.CountedRegions.end();
|
|
while (I != E && I->FileID != FileID)
|
|
++I;
|
|
assert(I != E && "function does not cover the given file");
|
|
auto &Functions = InstantiatedFunctions[I->startLoc()];
|
|
Functions.push_back(&Function);
|
|
}
|
|
|
|
MapT::iterator begin() { return InstantiatedFunctions.begin(); }
|
|
|
|
MapT::iterator end() { return InstantiatedFunctions.end(); }
|
|
};
|
|
|
|
class SegmentBuilder {
|
|
std::vector<CoverageSegment> Segments;
|
|
SmallVector<const CountedRegion *, 8> ActiveRegions;
|
|
|
|
/// Start a segment with no count specified.
|
|
void startSegment(unsigned Line, unsigned Col) {
|
|
DEBUG(dbgs() << "Top level segment at " << Line << ":" << Col << "\n");
|
|
Segments.emplace_back(Line, Col, /*IsRegionEntry=*/false);
|
|
}
|
|
|
|
/// Start a segment with the given Region's count.
|
|
void startSegment(unsigned Line, unsigned Col, bool IsRegionEntry,
|
|
const CountedRegion &Region) {
|
|
if (Segments.empty())
|
|
Segments.emplace_back(Line, Col, IsRegionEntry);
|
|
CoverageSegment S = Segments.back();
|
|
// Avoid creating empty regions.
|
|
if (S.Line != Line || S.Col != Col) {
|
|
Segments.emplace_back(Line, Col, IsRegionEntry);
|
|
S = Segments.back();
|
|
}
|
|
DEBUG(dbgs() << "Segment at " << Line << ":" << Col);
|
|
// Set this region's count.
|
|
if (Region.Kind != coverage::CounterMappingRegion::SkippedRegion) {
|
|
DEBUG(dbgs() << " with count " << Region.ExecutionCount);
|
|
Segments.back().setCount(Region.ExecutionCount);
|
|
}
|
|
DEBUG(dbgs() << "\n");
|
|
}
|
|
|
|
/// Start a segment for the given region.
|
|
void startSegment(const CountedRegion &Region) {
|
|
startSegment(Region.LineStart, Region.ColumnStart, true, Region);
|
|
}
|
|
|
|
/// Pop the top region off of the active stack, starting a new segment with
|
|
/// the containing Region's count.
|
|
void popRegion() {
|
|
const CountedRegion *Active = ActiveRegions.back();
|
|
unsigned Line = Active->LineEnd, Col = Active->ColumnEnd;
|
|
ActiveRegions.pop_back();
|
|
if (ActiveRegions.empty())
|
|
startSegment(Line, Col);
|
|
else
|
|
startSegment(Line, Col, false, *ActiveRegions.back());
|
|
}
|
|
|
|
public:
|
|
/// Build a list of CoverageSegments from a sorted list of Regions.
|
|
std::vector<CoverageSegment> buildSegments(ArrayRef<CountedRegion> Regions) {
|
|
for (const auto &Region : Regions) {
|
|
// Pop any regions that end before this one starts.
|
|
while (!ActiveRegions.empty() &&
|
|
ActiveRegions.back()->endLoc() <= Region.startLoc())
|
|
popRegion();
|
|
if (Segments.size() && Segments.back().Line == Region.LineStart &&
|
|
Segments.back().Col == Region.ColumnStart) {
|
|
if (Region.Kind != coverage::CounterMappingRegion::SkippedRegion)
|
|
Segments.back().addCount(Region.ExecutionCount);
|
|
} else {
|
|
// Add this region to the stack.
|
|
ActiveRegions.push_back(&Region);
|
|
startSegment(Region);
|
|
}
|
|
}
|
|
// Pop any regions that are left in the stack.
|
|
while (!ActiveRegions.empty())
|
|
popRegion();
|
|
return Segments;
|
|
}
|
|
};
|
|
}
|
|
|
|
std::vector<StringRef> CoverageMapping::getUniqueSourceFiles() {
|
|
std::vector<StringRef> Filenames;
|
|
for (const auto &Function : getCoveredFunctions())
|
|
for (const auto &Filename : Function.Filenames)
|
|
Filenames.push_back(Filename);
|
|
std::sort(Filenames.begin(), Filenames.end());
|
|
auto Last = std::unique(Filenames.begin(), Filenames.end());
|
|
Filenames.erase(Last, Filenames.end());
|
|
return Filenames;
|
|
}
|
|
|
|
static Optional<unsigned> findMainViewFileID(StringRef SourceFile,
|
|
const FunctionRecord &Function) {
|
|
llvm::SmallVector<bool, 8> IsExpandedFile(Function.Filenames.size(), false);
|
|
llvm::SmallVector<bool, 8> FilenameEquivalence(Function.Filenames.size(),
|
|
false);
|
|
for (unsigned I = 0, E = Function.Filenames.size(); I < E; ++I)
|
|
if (SourceFile == Function.Filenames[I])
|
|
FilenameEquivalence[I] = true;
|
|
for (const auto &CR : Function.CountedRegions)
|
|
if (CR.Kind == CounterMappingRegion::ExpansionRegion &&
|
|
FilenameEquivalence[CR.FileID])
|
|
IsExpandedFile[CR.ExpandedFileID] = true;
|
|
for (unsigned I = 0, E = Function.Filenames.size(); I < E; ++I)
|
|
if (FilenameEquivalence[I] && !IsExpandedFile[I])
|
|
return I;
|
|
return None;
|
|
}
|
|
|
|
static Optional<unsigned> findMainViewFileID(const FunctionRecord &Function) {
|
|
llvm::SmallVector<bool, 8> IsExpandedFile(Function.Filenames.size(), false);
|
|
for (const auto &CR : Function.CountedRegions)
|
|
if (CR.Kind == CounterMappingRegion::ExpansionRegion)
|
|
IsExpandedFile[CR.ExpandedFileID] = true;
|
|
for (unsigned I = 0, E = Function.Filenames.size(); I < E; ++I)
|
|
if (!IsExpandedFile[I])
|
|
return I;
|
|
return None;
|
|
}
|
|
|
|
static SmallSet<unsigned, 8> gatherFileIDs(StringRef SourceFile,
|
|
const FunctionRecord &Function) {
|
|
SmallSet<unsigned, 8> IDs;
|
|
for (unsigned I = 0, E = Function.Filenames.size(); I < E; ++I)
|
|
if (SourceFile == Function.Filenames[I])
|
|
IDs.insert(I);
|
|
return IDs;
|
|
}
|
|
|
|
/// Sort a nested sequence of regions from a single file.
|
|
template <class It> static void sortNestedRegions(It First, It Last) {
|
|
std::sort(First, Last,
|
|
[](const CountedRegion &LHS, const CountedRegion &RHS) {
|
|
if (LHS.startLoc() == RHS.startLoc())
|
|
// When LHS completely contains RHS, we sort LHS first.
|
|
return RHS.endLoc() < LHS.endLoc();
|
|
return LHS.startLoc() < RHS.startLoc();
|
|
});
|
|
}
|
|
|
|
static bool isExpansion(const CountedRegion &R, unsigned FileID) {
|
|
return R.Kind == CounterMappingRegion::ExpansionRegion && R.FileID == FileID;
|
|
}
|
|
|
|
CoverageData CoverageMapping::getCoverageForFile(StringRef Filename) {
|
|
CoverageData FileCoverage(Filename);
|
|
std::vector<coverage::CountedRegion> Regions;
|
|
|
|
for (const auto &Function : Functions) {
|
|
auto MainFileID = findMainViewFileID(Filename, Function);
|
|
if (!MainFileID)
|
|
continue;
|
|
auto FileIDs = gatherFileIDs(Filename, Function);
|
|
for (const auto &CR : Function.CountedRegions)
|
|
if (FileIDs.count(CR.FileID)) {
|
|
Regions.push_back(CR);
|
|
if (isExpansion(CR, *MainFileID))
|
|
FileCoverage.Expansions.emplace_back(CR, Function);
|
|
}
|
|
}
|
|
|
|
sortNestedRegions(Regions.begin(), Regions.end());
|
|
FileCoverage.Segments = SegmentBuilder().buildSegments(Regions);
|
|
|
|
return FileCoverage;
|
|
}
|
|
|
|
std::vector<const FunctionRecord *>
|
|
CoverageMapping::getInstantiations(StringRef Filename) {
|
|
FunctionInstantiationSetCollector InstantiationSetCollector;
|
|
for (const auto &Function : Functions) {
|
|
auto MainFileID = findMainViewFileID(Filename, Function);
|
|
if (!MainFileID)
|
|
continue;
|
|
InstantiationSetCollector.insert(Function, *MainFileID);
|
|
}
|
|
|
|
std::vector<const FunctionRecord *> Result;
|
|
for (const auto &InstantiationSet : InstantiationSetCollector) {
|
|
if (InstantiationSet.second.size() < 2)
|
|
continue;
|
|
for (auto Function : InstantiationSet.second)
|
|
Result.push_back(Function);
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
CoverageData
|
|
CoverageMapping::getCoverageForFunction(const FunctionRecord &Function) {
|
|
auto MainFileID = findMainViewFileID(Function);
|
|
if (!MainFileID)
|
|
return CoverageData();
|
|
|
|
CoverageData FunctionCoverage(Function.Filenames[*MainFileID]);
|
|
std::vector<coverage::CountedRegion> Regions;
|
|
for (const auto &CR : Function.CountedRegions)
|
|
if (CR.FileID == *MainFileID) {
|
|
Regions.push_back(CR);
|
|
if (isExpansion(CR, *MainFileID))
|
|
FunctionCoverage.Expansions.emplace_back(CR, Function);
|
|
}
|
|
|
|
sortNestedRegions(Regions.begin(), Regions.end());
|
|
FunctionCoverage.Segments = SegmentBuilder().buildSegments(Regions);
|
|
|
|
return FunctionCoverage;
|
|
}
|
|
|
|
CoverageData
|
|
CoverageMapping::getCoverageForExpansion(const ExpansionRecord &Expansion) {
|
|
CoverageData ExpansionCoverage(
|
|
Expansion.Function.Filenames[Expansion.FileID]);
|
|
std::vector<coverage::CountedRegion> Regions;
|
|
for (const auto &CR : Expansion.Function.CountedRegions)
|
|
if (CR.FileID == Expansion.FileID) {
|
|
Regions.push_back(CR);
|
|
if (isExpansion(CR, Expansion.FileID))
|
|
ExpansionCoverage.Expansions.emplace_back(CR, Expansion.Function);
|
|
}
|
|
|
|
sortNestedRegions(Regions.begin(), Regions.end());
|
|
ExpansionCoverage.Segments = SegmentBuilder().buildSegments(Regions);
|
|
|
|
return ExpansionCoverage;
|
|
}
|