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   uint32_t FileID;
  14   uint32_t ExpandedFileID;
  15   uint32_t LineStart;
  16   uint32_t ColumnStart;
  17   uint32_t LineEnd;
  18   uint32_t ColumnEnd;
  19   coverage::CounterMappingRegion::RegionKind Kind;
  20 };
  21
  22 extern "C" void LLVMRustCoverageWriteFilenamesSectionToBuffer(
  23     const char* const Filenames[],
  24     size_t FilenamesLen,
  25     RustStringRef BufferOut) {
  26 #if LLVM_VERSION_GE(13,0)
  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 #else
  32   SmallVector<StringRef,32> FilenameRefs;
  33   for (size_t i = 0; i < FilenamesLen; i++) {
  34     FilenameRefs.push_back(StringRef(Filenames[i]));
  35   }
  36 #endif
  37   auto FilenamesWriter = coverage::CoverageFilenamesSectionWriter(
  38     makeArrayRef(FilenameRefs));
  39   RawRustStringOstream OS(BufferOut);
  40   FilenamesWriter.write(OS);
  41 }
  42
  43 extern "C" void LLVMRustCoverageWriteMappingToBuffer(
  44     const unsigned *VirtualFileMappingIDs,
  45     unsigned NumVirtualFileMappingIDs,
  46     const coverage::CounterExpression *Expressions,
  47     unsigned NumExpressions,
  48     LLVMRustCounterMappingRegion *RustMappingRegions,
  49     unsigned NumMappingRegions,
  50     RustStringRef BufferOut) {
  51   // Convert from FFI representation to LLVM representation.
  52   SmallVector<coverage::CounterMappingRegion, 0> MappingRegions;
  53   MappingRegions.reserve(NumMappingRegions);
  54   for (const auto &Region : makeArrayRef(RustMappingRegions, NumMappingRegions)) {
  55     MappingRegions.emplace_back(
  56         Region.Count, Region.FileID, Region.ExpandedFileID,
  57         Region.LineStart, Region.ColumnStart, Region.LineEnd, Region.ColumnEnd,
  58         Region.Kind);
  59   }
  60   auto CoverageMappingWriter = coverage::CoverageMappingWriter(
  61       makeArrayRef(VirtualFileMappingIDs, NumVirtualFileMappingIDs),
  62       makeArrayRef(Expressions, NumExpressions),
  63       MappingRegions);
  64   RawRustStringOstream OS(BufferOut);
  65   CoverageMappingWriter.write(OS);
  66 }
  67
  68 extern "C" LLVMValueRef LLVMRustCoverageCreatePGOFuncNameVar(LLVMValueRef F, const char *FuncName) {
  69   StringRef FuncNameRef(FuncName);
  70   return wrap(createPGOFuncNameVar(*cast<Function>(unwrap(F)), FuncNameRef));
  71 }
  72
  73 extern "C" uint64_t LLVMRustCoverageHashCString(const char *StrVal) {
  74   StringRef StrRef(StrVal);
  75   return IndexedInstrProf::ComputeHash(StrRef);
  76 }
  77
  78 extern "C" uint64_t LLVMRustCoverageHashByteArray(
  79     const char *Bytes,
  80     unsigned NumBytes) {
  81   StringRef StrRef(Bytes, NumBytes);
  82   return IndexedInstrProf::ComputeHash(StrRef);
  83 }
  84
  85 static void WriteSectionNameToString(LLVMModuleRef M,
  86                                      InstrProfSectKind SK,
  87                                      RustStringRef Str) {
  88   Triple TargetTriple(unwrap(M)->getTargetTriple());
  89   auto name = getInstrProfSectionName(SK, TargetTriple.getObjectFormat());
  90   RawRustStringOstream OS(Str);
  91   OS << name;
  92 }
  93
  94 extern "C" void LLVMRustCoverageWriteMapSectionNameToString(LLVMModuleRef M,
  95                                                             RustStringRef Str) {
  96   WriteSectionNameToString(M, IPSK_covmap, Str);
  97 }
  98
  99 extern "C" void LLVMRustCoverageWriteFuncSectionNameToString(LLVMModuleRef M,
 100                                                              RustStringRef Str) {
 101   WriteSectionNameToString(M, IPSK_covfun, Str);
 102 }
 103
 104 extern "C" void LLVMRustCoverageWriteMappingVarNameToString(RustStringRef Str) {
 105   auto name = getCoverageMappingVarName();
 106   RawRustStringOstream OS(Str);
 107   OS << name;
 108 }
 109
 110 extern "C" uint32_t LLVMRustCoverageMappingVersion() {
 111   return coverage::CovMapVersion::Version4;
 112 }