Coverage Report

Created: 2018-07-19 20:53

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/clang/tools/driver/cc1gen_reproducer_main.cpp
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//===-- cc1gen_reproducer_main.cpp - Clang reproducer generator  ----------===//
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//
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//                     The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This is the entry point to the clang -cc1gen-reproducer functionality, which
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// generates reproducers for invocations for clang-based tools.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Basic/LLVM.h"
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#include "clang/Basic/VirtualFileSystem.h"
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#include "clang/Driver/Compilation.h"
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#include "clang/Driver/Driver.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Support/YAMLTraits.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace clang;
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namespace {
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struct UnsavedFileHash {
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  std::string Name;
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  std::string MD5;
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};
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struct ClangInvocationInfo {
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  std::string Toolchain;
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  std::string LibclangOperation;
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  std::string LibclangOptions;
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  std::vector<std::string> Arguments;
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  std::vector<std::string> InvocationArguments;
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  std::vector<UnsavedFileHash> UnsavedFileHashes;
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  bool Dump = false;
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};
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} // end anonymous namespace
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LLVM_YAML_IS_SEQUENCE_VECTOR(UnsavedFileHash)
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namespace llvm {
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namespace yaml {
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template <> struct MappingTraits<UnsavedFileHash> {
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  static void mapping(IO &IO, UnsavedFileHash &Info) {
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    IO.mapRequired("name", Info.Name);
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    IO.mapRequired("md5", Info.MD5);
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  }
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};
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template <> struct MappingTraits<ClangInvocationInfo> {
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  static void mapping(IO &IO, ClangInvocationInfo &Info) {
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    IO.mapRequired("toolchain", Info.Toolchain);
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    IO.mapOptional("libclang.operation", Info.LibclangOperation);
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    IO.mapOptional("libclang.opts", Info.LibclangOptions);
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    IO.mapRequired("args", Info.Arguments);
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    IO.mapOptional("invocation-args", Info.InvocationArguments);
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    IO.mapOptional("unsaved_file_hashes", Info.UnsavedFileHashes);
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  }
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};
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} // end namespace yaml
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} // end namespace llvm
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static std::string generateReproducerMetaInfo(const ClangInvocationInfo &Info) {
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  std::string Result;
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  llvm::raw_string_ostream OS(Result);
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  OS << '{';
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  bool NeedComma = false;
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  auto EmitKey = [&](StringRef Key) {
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    if (NeedComma)
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      OS << ", ";
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    NeedComma = true;
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    OS << '"' << Key << "\": ";
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  };
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  auto EmitStringKey = [&](StringRef Key, StringRef Value) {
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    if (Value.empty())
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      return;
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    EmitKey(Key);
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    OS << '"' << Value << '"';
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  };
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  EmitStringKey("libclang.operation", Info.LibclangOperation);
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  EmitStringKey("libclang.opts", Info.LibclangOptions);
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  if (!Info.InvocationArguments.empty()) {
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    EmitKey("invocation-args");
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    OS << '[';
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    for (const auto &Arg : llvm::enumerate(Info.InvocationArguments)) {
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      if (Arg.index())
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        OS << ',';
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      OS << '"' << Arg.value() << '"';
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    }
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    OS << ']';
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  }
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  OS << '}';
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  // FIXME: Compare unsaved file hashes and report mismatch in the reproducer.
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  if (Info.Dump)
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    llvm::outs() << "REPRODUCER METAINFO: " << OS.str() << "\n";
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  return std::move(OS.str());
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}
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/// Generates a reproducer for a set of arguments from a specific invocation.
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static llvm::Optional<driver::Driver::CompilationDiagnosticReport>
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generateReproducerForInvocationArguments(ArrayRef<const char *> Argv,
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                                         const ClangInvocationInfo &Info) {
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  using namespace driver;
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  auto TargetAndMode = ToolChain::getTargetAndModeFromProgramName(Argv[0]);
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  IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions;
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  IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
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  DiagnosticsEngine Diags(DiagID, &*DiagOpts, new IgnoringDiagConsumer());
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  ProcessWarningOptions(Diags, *DiagOpts, /*ReportDiags=*/false);
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  Driver TheDriver(Argv[0], llvm::sys::getDefaultTargetTriple(), Diags);
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  TheDriver.setTargetAndMode(TargetAndMode);
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  std::unique_ptr<Compilation> C(TheDriver.BuildCompilation(Argv));
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  if (C && !C->containsError()) {
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    for (const auto &J : C->getJobs()) {
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      if (const Command *Cmd = dyn_cast<Command>(&J)) {
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        Driver::CompilationDiagnosticReport Report;
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        TheDriver.generateCompilationDiagnostics(
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            *C, *Cmd, generateReproducerMetaInfo(Info), &Report);
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        return Report;
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      }
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    }
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  }
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return None0
;
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}
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std::string GetExecutablePath(const char *Argv0, bool CanonicalPrefixes);
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static void printReproducerInformation(
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    llvm::raw_ostream &OS, const ClangInvocationInfo &Info,
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    const driver::Driver::CompilationDiagnosticReport &Report) {
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  OS << "REPRODUCER:\n";
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  OS << "{\n";
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  OS << R"("files":[)";
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  for (const auto &File : llvm::enumerate(Report.TemporaryFiles)) {
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    if (File.index())
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      OS << ',';
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    OS << '"' << File.value() << '"';
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  }
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  OS << "]\n}\n";
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}
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int cc1gen_reproducer_main(ArrayRef<const char *> Argv, const char *Argv0,
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                           void *MainAddr) {
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  if (Argv.size() < 1) {
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    llvm::errs() << "error: missing invocation file\n";
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    return 1;
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  }
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  // Parse the invocation descriptor.
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  StringRef Input = Argv[0];
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  llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
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      llvm::MemoryBuffer::getFile(Input);
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  if (!Buffer) {
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    llvm::errs() << "error: failed to read " << Input << ": "
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                 << Buffer.getError().message() << "\n";
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    return 1;
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  }
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  llvm::yaml::Input YAML(Buffer.get()->getBuffer());
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  ClangInvocationInfo InvocationInfo;
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  YAML >> InvocationInfo;
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  if (Argv.size() > 1 && Argv[1] == StringRef("-v"))
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    InvocationInfo.Dump = true;
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  // Create an invocation that will produce the reproducer.
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  std::vector<const char *> DriverArgs;
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  for (const auto &Arg : InvocationInfo.Arguments)
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    DriverArgs.push_back(Arg.c_str());
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  std::string Path = GetExecutablePath(Argv0, /*CanonicalPrefixes=*/true);
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  DriverArgs[0] = Path.c_str();
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  llvm::Optional<driver::Driver::CompilationDiagnosticReport> Report =
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      generateReproducerForInvocationArguments(DriverArgs, InvocationInfo);
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  // Emit the information about the reproduce files to stdout.
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  int Result = 1;
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  if (Report) {
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    printReproducerInformation(llvm::outs(), InvocationInfo, *Report);
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    Result = 0;
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  }
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  // Remove the input file.
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  llvm::sys::fs::remove(Input);
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  return Result;
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}