Imported Upstream version 5.18.0.179

Former-commit-id: 67aa10e65b237e1c4537630979ee99ebe1374215

external/llvm/tools/llvm-cov/TestingSupport.cpp

@@ -0,0 +1,95 @@
+//===- TestingSupport.cpp - Convert objects files into test files --------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/ProfileData/InstrProf.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/LEB128.h"
+#include "llvm/Support/raw_ostream.h"
+#include <functional>
+#include <system_error>
+
+using namespace llvm;
+using namespace object;
+
+int convertForTestingMain(int argc, const char *argv[]) {
+  cl::opt<std::string> InputSourceFile(cl::Positional, cl::Required,
+                                       cl::desc("<Source file>"));
+
+  cl::opt<std::string> OutputFilename(
+      "o", cl::Required,
+      cl::desc(
+          "File with the profile data obtained after an instrumented run"));
+
+  cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n");
+
+  auto ObjErr = llvm::object::ObjectFile::createObjectFile(InputSourceFile);
+  if (!ObjErr) {
+    std::string Buf;
+    raw_string_ostream OS(Buf);
+    logAllUnhandledErrors(ObjErr.takeError(), OS, "");
+    OS.flush();
+    errs() << "error: " << Buf;
+    return 1;
+  }
+  ObjectFile *OF = ObjErr.get().getBinary();
+  auto BytesInAddress = OF->getBytesInAddress();
+  if (BytesInAddress != 8) {
+    errs() << "error: 64 bit binary expected\n";
+    return 1;
+  }
+
+  // Look for the sections that we are interested in.
+  int FoundSectionCount = 0;
+  SectionRef ProfileNames, CoverageMapping;
+  auto ObjFormat = OF->getTripleObjectFormat();
+  for (const auto &Section : OF->sections()) {
+    StringRef Name;
+    if (Section.getName(Name))
+      return 1;
+    if (Name == llvm::getInstrProfSectionName(IPSK_name, ObjFormat,
+                                              /*AddSegmentInfo=*/false)) {
+      ProfileNames = Section;
+    } else if (Name == llvm::getInstrProfSectionName(
+                           IPSK_covmap, ObjFormat, /*AddSegmentInfo=*/false)) {
+      CoverageMapping = Section;
+    } else
+      continue;
+    ++FoundSectionCount;
+  }
+  if (FoundSectionCount != 2)
+    return 1;
+
+  // Get the contents of the given sections.
+  uint64_t ProfileNamesAddress = ProfileNames.getAddress();
+  StringRef CoverageMappingData;
+  StringRef ProfileNamesData;
+  if (CoverageMapping.getContents(CoverageMappingData) ||
+      ProfileNames.getContents(ProfileNamesData))
+    return 1;
+
+  int FD;
+  if (auto Err =
+          sys::fs::openFileForWrite(OutputFilename, FD, sys::fs::F_None)) {
+    errs() << "error: " << Err.message() << "\n";
+    return 1;
+  }
+
+  raw_fd_ostream OS(FD, true);
+  OS << "llvmcovmtestdata";
+  encodeULEB128(ProfileNamesData.size(), OS);
+  encodeULEB128(ProfileNamesAddress, OS);
+  OS << ProfileNamesData;
+  // Coverage mapping data is expected to have an alignment of 8.
+  for (unsigned Pad = OffsetToAlignment(OS.tell(), 8); Pad; --Pad)
+    OS.write(uint8_t(0));
+  OS << CoverageMappingData;
+
+  return 0;
+}