1 files changed, 107 insertions, 0 deletions
diff --git a/compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp
new file mode 100644
index 00000000000..03e6d2149e9
--- /dev/null
+++ b/compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp
@@ -0,0 +1,107 @@
+#include "LLVMWrapper.h"
+#include "llvm/ProfileData/Coverage/CoverageMapping.h"
+#include "llvm/ProfileData/Coverage/CoverageMappingWriter.h"
+#include "llvm/ProfileData/InstrProf.h"
+#include "llvm/ADT/ArrayRef.h"
+
+#include <iostream>
+
+using namespace llvm;
+
+struct LLVMRustCounterMappingRegion {
+  coverage::Counter Count;
+  coverage::Counter FalseCount;
+  uint32_t FileID;
+  uint32_t ExpandedFileID;
+  uint32_t LineStart;
+  uint32_t ColumnStart;
+  uint32_t LineEnd;
+  uint32_t ColumnEnd;
+  coverage::CounterMappingRegion::RegionKind Kind;
+};
+
+extern "C" void LLVMRustCoverageWriteFilenamesSectionToBuffer(
+    const char* const Filenames[],
+    size_t FilenamesLen,
+    RustStringRef BufferOut) {
+  SmallVector<std::string,32> FilenameRefs;
+  for (size_t i = 0; i < FilenamesLen; i++) {
+    FilenameRefs.push_back(std::string(Filenames[i]));
+  }
+  auto FilenamesWriter =
+      coverage::CoverageFilenamesSectionWriter(ArrayRef<std::string>(FilenameRefs));
+  RawRustStringOstream OS(BufferOut);
+  FilenamesWriter.write(OS);
+}
+
+extern "C" void LLVMRustCoverageWriteMappingToBuffer(
+    const unsigned *VirtualFileMappingIDs,
+    unsigned NumVirtualFileMappingIDs,
+    const coverage::CounterExpression *Expressions,
+    unsigned NumExpressions,
+    LLVMRustCounterMappingRegion *RustMappingRegions,
+    unsigned NumMappingRegions,
+    RustStringRef BufferOut) {
+  // Convert from FFI representation to LLVM representation.
+  SmallVector<coverage::CounterMappingRegion, 0> MappingRegions;
+  MappingRegions.reserve(NumMappingRegions);
+  for (const auto &Region : ArrayRef<LLVMRustCounterMappingRegion>(
+           RustMappingRegions, NumMappingRegions)) {
+    MappingRegions.emplace_back(
+        Region.Count, Region.FalseCount, Region.FileID, Region.ExpandedFileID,
+        Region.LineStart, Region.ColumnStart, Region.LineEnd, Region.ColumnEnd,
+        Region.Kind);
+  }
+  auto CoverageMappingWriter = coverage::CoverageMappingWriter(
+      ArrayRef<unsigned>(VirtualFileMappingIDs, NumVirtualFileMappingIDs),
+      ArrayRef<coverage::CounterExpression>(Expressions, NumExpressions),
+      MappingRegions);
+  RawRustStringOstream OS(BufferOut);
+  CoverageMappingWriter.write(OS);
+}
+
+extern "C" LLVMValueRef LLVMRustCoverageCreatePGOFuncNameVar(LLVMValueRef F, const char *FuncName) {
+  StringRef FuncNameRef(FuncName);
+  return wrap(createPGOFuncNameVar(*cast<Function>(unwrap(F)), FuncNameRef));
+}
+
+extern "C" uint64_t LLVMRustCoverageHashCString(const char *StrVal) {
+  StringRef StrRef(StrVal);
+  return IndexedInstrProf::ComputeHash(StrRef);
+}
+
+extern "C" uint64_t LLVMRustCoverageHashByteArray(
+    const char *Bytes,
+    unsigned NumBytes) {
+  StringRef StrRef(Bytes, NumBytes);
+  return IndexedInstrProf::ComputeHash(StrRef);
+}
+
+static void WriteSectionNameToString(LLVMModuleRef M,
+                                     InstrProfSectKind SK,
+                                     RustStringRef Str) {
+  Triple TargetTriple(unwrap(M)->getTargetTriple());
+  auto name = getInstrProfSectionName(SK, TargetTriple.getObjectFormat());
+  RawRustStringOstream OS(Str);
+  OS << name;
+}
+
+extern "C" void LLVMRustCoverageWriteMapSectionNameToString(LLVMModuleRef M,
+                                                            RustStringRef Str) {
+  WriteSectionNameToString(M, IPSK_covmap, Str);
+}
+
+extern "C" void LLVMRustCoverageWriteFuncSectionNameToString(LLVMModuleRef M,
+                                                             RustStringRef Str) {
+  WriteSectionNameToString(M, IPSK_covfun, Str);
+}
+
+extern "C" void LLVMRustCoverageWriteMappingVarNameToString(RustStringRef Str) {
+  auto name = getCoverageMappingVarName();
+  RawRustStringOstream OS(Str);
+  OS << name;
+}
+
+extern "C" uint32_t LLVMRustCoverageMappingVersion() {
+  return coverage::CovMapVersion::Version6;
+}