compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp

   1 #include "LLVMWrapper.h"
   2 #include "llvm/ProfileData/Coverage/CoverageMapping.h"
   3 #include "llvm/ProfileData/Coverage/CoverageMappingWriter.h"
   4 #include "llvm/ProfileData/InstrProf.h"
   5 #include "llvm/ADT/ArrayRef.h"
   6
   7 #include <iostream>
   8
   9 using namespace llvm;
  10
  11 struct LLVMRustCounterMappingRegion {
  12   coverage::Counter Count;
  13   coverage::Counter FalseCount;
  14   uint32_t FileID;
  15   uint32_t ExpandedFileID;
  16   uint32_t LineStart;
  17   uint32_t ColumnStart;
  18   uint32_t LineEnd;
  19   uint32_t ColumnEnd;
  20   coverage::CounterMappingRegion::RegionKind Kind;
  21 };
  22
  23 extern "C" void LLVMRustCoverageWriteFilenamesSectionToBuffer(
  24     const char* const Filenames[],
  25     size_t FilenamesLen,
  26     RustStringRef BufferOut) {
  27   SmallVector<std::string,32> FilenameRefs;
  28   for (size_t i = 0; i < FilenamesLen; i++) {
  29     FilenameRefs.push_back(std::string(Filenames[i]));
  30   }
  31   auto FilenamesWriter =
  32       coverage::CoverageFilenamesSectionWriter(ArrayRef<std::string>(FilenameRefs));
  33   RawRustStringOstream OS(BufferOut);
  34   FilenamesWriter.write(OS);
  35 }
  36
  37 extern "C" void LLVMRustCoverageWriteMappingToBuffer(
  38     const unsigned *VirtualFileMappingIDs,
  39     unsigned NumVirtualFileMappingIDs,
  40     const coverage::CounterExpression *Expressions,
  41     unsigned NumExpressions,
  42     LLVMRustCounterMappingRegion *RustMappingRegions,
  43     unsigned NumMappingRegions,
  44     RustStringRef BufferOut) {
  45   // Convert from FFI representation to LLVM representation.
  46   SmallVector<coverage::CounterMappingRegion, 0> MappingRegions;
  47   MappingRegions.reserve(NumMappingRegions);
  48   for (const auto &Region : ArrayRef<LLVMRustCounterMappingRegion>(
  49            RustMappingRegions, NumMappingRegions)) {
  50     MappingRegions.emplace_back(
  51         Region.Count, Region.FalseCount, Region.FileID, Region.ExpandedFileID,
  52         Region.LineStart, Region.ColumnStart, Region.LineEnd, Region.ColumnEnd,
  53         Region.Kind);
  54   }
  55   auto CoverageMappingWriter = coverage::CoverageMappingWriter(
  56       ArrayRef<unsigned>(VirtualFileMappingIDs, NumVirtualFileMappingIDs),
  57       ArrayRef<coverage::CounterExpression>(Expressions, NumExpressions),
  58       MappingRegions);
  59   RawRustStringOstream OS(BufferOut);
  60   CoverageMappingWriter.write(OS);
  61 }
  62
  63 extern "C" LLVMValueRef LLVMRustCoverageCreatePGOFuncNameVar(LLVMValueRef F, const char *FuncName) {
  64   StringRef FuncNameRef(FuncName);
  65   return wrap(createPGOFuncNameVar(*cast<Function>(unwrap(F)), FuncNameRef));
  66 }
  67
  68 extern "C" uint64_t LLVMRustCoverageHashCString(const char *StrVal) {
  69   StringRef StrRef(StrVal);
  70   return IndexedInstrProf::ComputeHash(StrRef);
  71 }
  72
  73 extern "C" uint64_t LLVMRustCoverageHashByteArray(
  74     const char *Bytes,
  75     unsigned NumBytes) {
  76   StringRef StrRef(Bytes, NumBytes);
  77   return IndexedInstrProf::ComputeHash(StrRef);
  78 }
  79
  80 static void WriteSectionNameToString(LLVMModuleRef M,
  81                                      InstrProfSectKind SK,
  82                                      RustStringRef Str) {
  83   Triple TargetTriple(unwrap(M)->getTargetTriple());
  84   auto name = getInstrProfSectionName(SK, TargetTriple.getObjectFormat());
  85   RawRustStringOstream OS(Str);
  86   OS << name;
  87 }
  88
  89 extern "C" void LLVMRustCoverageWriteMapSectionNameToString(LLVMModuleRef M,
  90                                                             RustStringRef Str) {
  91   WriteSectionNameToString(M, IPSK_covmap, Str);
  92 }
  93
  94 extern "C" void LLVMRustCoverageWriteFuncSectionNameToString(LLVMModuleRef M,
  95                                                              RustStringRef Str) {
  96   WriteSectionNameToString(M, IPSK_covfun, Str);
  97 }
  98
  99 extern "C" void LLVMRustCoverageWriteMappingVarNameToString(RustStringRef Str) {
 100   auto name = getCoverageMappingVarName();
 101   RawRustStringOstream OS(Str);
 102   OS << name;
 103 }
 104
 105 extern "C" uint32_t LLVMRustCoverageMappingVersion() {
 106   return coverage::CovMapVersion::Version6;
 107 }