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 #if LLVM_VERSION_GE(13,0)
  28   SmallVector<std::string,32> FilenameRefs;
  29   for (size_t i = 0; i < FilenamesLen; i++) {
  30     FilenameRefs.push_back(std::string(Filenames[i]));
  31   }
  32 #else
  33   SmallVector<StringRef,32> FilenameRefs;
  34   for (size_t i = 0; i < FilenamesLen; i++) {
  35     FilenameRefs.push_back(StringRef(Filenames[i]));
  36   }
  37 #endif
  38   auto FilenamesWriter = coverage::CoverageFilenamesSectionWriter(
  39     makeArrayRef(FilenameRefs));
  40   RawRustStringOstream OS(BufferOut);
  41   FilenamesWriter.write(OS);
  42 }
  43
  44 extern "C" void LLVMRustCoverageWriteMappingToBuffer(
  45     const unsigned *VirtualFileMappingIDs,
  46     unsigned NumVirtualFileMappingIDs,
  47     const coverage::CounterExpression *Expressions,
  48     unsigned NumExpressions,
  49     LLVMRustCounterMappingRegion *RustMappingRegions,
  50     unsigned NumMappingRegions,
  51     RustStringRef BufferOut) {
  52   // Convert from FFI representation to LLVM representation.
  53   SmallVector<coverage::CounterMappingRegion, 0> MappingRegions;
  54   MappingRegions.reserve(NumMappingRegions);
  55   for (const auto &Region : makeArrayRef(RustMappingRegions, NumMappingRegions)) {
  56     MappingRegions.emplace_back(
  57         Region.Count, Region.FalseCount, Region.FileID, Region.ExpandedFileID,
  58         Region.LineStart, Region.ColumnStart, Region.LineEnd, Region.ColumnEnd,
  59         Region.Kind);
  60   }
  61   auto CoverageMappingWriter = coverage::CoverageMappingWriter(
  62       makeArrayRef(VirtualFileMappingIDs, NumVirtualFileMappingIDs),
  63       makeArrayRef(Expressions, NumExpressions),
  64       MappingRegions);
  65   RawRustStringOstream OS(BufferOut);
  66   CoverageMappingWriter.write(OS);
  67 }
  68
  69 extern "C" LLVMValueRef LLVMRustCoverageCreatePGOFuncNameVar(LLVMValueRef F, const char *FuncName) {
  70   StringRef FuncNameRef(FuncName);
  71   return wrap(createPGOFuncNameVar(*cast<Function>(unwrap(F)), FuncNameRef));
  72 }
  73
  74 extern "C" uint64_t LLVMRustCoverageHashCString(const char *StrVal) {
  75   StringRef StrRef(StrVal);
  76   return IndexedInstrProf::ComputeHash(StrRef);
  77 }
  78
  79 extern "C" uint64_t LLVMRustCoverageHashByteArray(
  80     const char *Bytes,
  81     unsigned NumBytes) {
  82   StringRef StrRef(Bytes, NumBytes);
  83   return IndexedInstrProf::ComputeHash(StrRef);
  84 }
  85
  86 static void WriteSectionNameToString(LLVMModuleRef M,
  87                                      InstrProfSectKind SK,
  88                                      RustStringRef Str) {
  89   Triple TargetTriple(unwrap(M)->getTargetTriple());
  90   auto name = getInstrProfSectionName(SK, TargetTriple.getObjectFormat());
  91   RawRustStringOstream OS(Str);
  92   OS << name;
  93 }
  94
  95 extern "C" void LLVMRustCoverageWriteMapSectionNameToString(LLVMModuleRef M,
  96                                                             RustStringRef Str) {
  97   WriteSectionNameToString(M, IPSK_covmap, Str);
  98 }
  99
 100 extern "C" void LLVMRustCoverageWriteFuncSectionNameToString(LLVMModuleRef M,
 101                                                              RustStringRef Str) {
 102   WriteSectionNameToString(M, IPSK_covfun, Str);
 103 }
 104
 105 extern "C" void LLVMRustCoverageWriteMappingVarNameToString(RustStringRef Str) {
 106   auto name = getCoverageMappingVarName();
 107   RawRustStringOstream OS(Str);
 108   OS << name;
 109 }
 110
 111 extern "C" uint32_t LLVMRustCoverageMappingVersion() {
 112 #if LLVM_VERSION_GE(13, 0)
 113   return coverage::CovMapVersion::Version6;
 114 #else
 115   return coverage::CovMapVersion::Version5;
 116 #endif
 117 }