1 files changed, 306 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/Driver/Job.cpp b/contrib/llvm/tools/clang/lib/Driver/Job.cpp
new file mode 100644
index 0000000..6d18a41
--- /dev/null
+++ b/contrib/llvm/tools/clang/lib/Driver/Job.cpp
@@ -0,0 +1,306 @@
+//===--- Job.cpp - Command to Execute -------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Driver/Driver.h"
+#include "clang/Driver/DriverDiagnostic.h"
+#include "clang/Driver/Job.h"
+#include "clang/Driver/Tool.h"
+#include "clang/Driver/ToolChain.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSet.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/Support/Program.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cassert>
+using namespace clang::driver;
+using llvm::raw_ostream;
+using llvm::StringRef;
+using llvm::ArrayRef;
+
+Job::~Job() {}
+
+Command::Command(const Action &_Source, const Tool &_Creator,
+                 const char *_Executable,
+                 const ArgStringList &_Arguments)
+    : Job(CommandClass), Source(_Source), Creator(_Creator),
+      Executable(_Executable), Arguments(_Arguments),
+      ResponseFile(nullptr) {}
+
+static int skipArgs(const char *Flag, bool HaveCrashVFS) {
+  // These flags are all of the form -Flag <Arg> and are treated as two
+  // arguments.  Therefore, we need to skip the flag and the next argument.
+  bool Res = llvm::StringSwitch<bool>(Flag)
+    .Cases("-I", "-MF", "-MT", "-MQ", true)
+    .Cases("-o", "-coverage-file", "-dependency-file", true)
+    .Cases("-fdebug-compilation-dir", "-idirafter", true)
+    .Cases("-include", "-include-pch", "-internal-isystem", true)
+    .Cases("-internal-externc-isystem", "-iprefix", "-iwithprefix", true)
+    .Cases("-iwithprefixbefore", "-isystem", "-iquote", true)
+    .Cases("-resource-dir", "-serialize-diagnostic-file", true)
+    .Cases("-dwarf-debug-flags", "-ivfsoverlay", true)
+    // Some include flags shouldn't be skipped if we have a crash VFS
+    .Case("-isysroot", !HaveCrashVFS)
+    .Default(false);
+
+  // Match found.
+  if (Res)
+    return 2;
+
+  // The remaining flags are treated as a single argument.
+
+  // These flags are all of the form -Flag and have no second argument.
+  Res = llvm::StringSwitch<bool>(Flag)
+    .Cases("-M", "-MM", "-MG", "-MP", "-MD", true)
+    .Case("-MMD", true)
+    .Default(false);
+
+  // Match found.
+  if (Res)
+    return 1;
+
+  // These flags are treated as a single argument (e.g., -F<Dir>).
+  StringRef FlagRef(Flag);
+  if (FlagRef.startswith("-F") || FlagRef.startswith("-I") ||
+      FlagRef.startswith("-fmodules-cache-path="))
+    return 1;
+
+  return 0;
+}
+
+static void PrintArg(raw_ostream &OS, const char *Arg, bool Quote) {
+  const bool Escape = std::strpbrk(Arg, "\"\\$");
+
+  if (!Quote && !Escape) {
+    OS << Arg;
+    return;
+  }
+
+  // Quote and escape. This isn't really complete, but good enough.
+  OS << '"';
+  while (const char c = *Arg++) {
+    if (c == '"' || c == '\\' || c == '$')
+      OS << '\\';
+    OS << c;
+  }
+  OS << '"';
+}
+
+void Command::writeResponseFile(raw_ostream &OS) const {
+  // In a file list, we only write the set of inputs to the response file
+  if (Creator.getResponseFilesSupport() == Tool::RF_FileList) {
+    for (const char *Arg : InputFileList) {
+      OS << Arg << '\n';
+    }
+    return;
+  }
+
+  // In regular response files, we send all arguments to the response file
+  for (const char *Arg : Arguments) {
+    OS << '"';
+
+    for (; *Arg != '\0'; Arg++) {
+      if (*Arg == '\"' || *Arg == '\\') {
+        OS << '\\';
+      }
+      OS << *Arg;
+    }
+
+    OS << "\" ";
+  }
+}
+
+void Command::buildArgvForResponseFile(
+    llvm::SmallVectorImpl<const char *> &Out) const {
+  // When not a file list, all arguments are sent to the response file.
+  // This leaves us to set the argv to a single parameter, requesting the tool
+  // to read the response file.
+  if (Creator.getResponseFilesSupport() != Tool::RF_FileList) {
+    Out.push_back(Executable);
+    Out.push_back(ResponseFileFlag.c_str());
+    return;
+  }
+
+  llvm::StringSet<> Inputs;
+  for (const char *InputName : InputFileList)
+    Inputs.insert(InputName);
+  Out.push_back(Executable);
+  // In a file list, build args vector ignoring parameters that will go in the
+  // response file (elements of the InputFileList vector)
+  bool FirstInput = true;
+  for (const char *Arg : Arguments) {
+    if (Inputs.count(Arg) == 0) {
+      Out.push_back(Arg);
+    } else if (FirstInput) {
+      FirstInput = false;
+      Out.push_back(Creator.getResponseFileFlag());
+      Out.push_back(ResponseFile);
+    }
+  }
+}
+
+void Command::Print(raw_ostream &OS, const char *Terminator, bool Quote,
+                    CrashReportInfo *CrashInfo) const {
+  // Always quote the exe.
+  OS << ' ';
+  PrintArg(OS, Executable, /*Quote=*/true);
+
+  llvm::ArrayRef<const char *> Args = Arguments;
+  llvm::SmallVector<const char *, 128> ArgsRespFile;
+  if (ResponseFile != nullptr) {
+    buildArgvForResponseFile(ArgsRespFile);
+    Args = ArrayRef<const char *>(ArgsRespFile).slice(1); // no executable name
+  }
+
+  StringRef MainFilename;
+  // We'll need the argument to -main-file-name to find the input file name.
+  if (CrashInfo)
+    for (size_t I = 0, E = Args.size(); I + 1 < E; ++I)
+      if (StringRef(Args[I]).equals("-main-file-name"))
+        MainFilename = Args[I + 1];
+
+  bool HaveCrashVFS = CrashInfo && !CrashInfo->VFSPath.empty();
+  for (size_t i = 0, e = Args.size(); i < e; ++i) {
+    const char *const Arg = Args[i];
+
+    if (CrashInfo) {
+      if (int Skip = skipArgs(Arg, HaveCrashVFS)) {
+        i += Skip - 1;
+        continue;
+      } else if (llvm::sys::path::filename(Arg) == MainFilename &&
+                 (i == 0 || StringRef(Args[i - 1]) != "-main-file-name")) {
+        // Replace the input file name with the crashinfo's file name.
+        OS << ' ';
+        StringRef ShortName = llvm::sys::path::filename(CrashInfo->Filename);
+        PrintArg(OS, ShortName.str().c_str(), Quote);
+        continue;
+      }
+    }
+
+    OS << ' ';
+    PrintArg(OS, Arg, Quote);
+  }
+
+  if (CrashInfo && HaveCrashVFS) {
+    OS << ' ';
+    PrintArg(OS, "-ivfsoverlay", Quote);
+    OS << ' ';
+    PrintArg(OS, CrashInfo->VFSPath.str().c_str(), Quote);
+  }
+
+  if (ResponseFile != nullptr) {
+    OS << "\n Arguments passed via response file:\n";
+    writeResponseFile(OS);
+    // Avoiding duplicated newline terminator, since FileLists are
+    // newline-separated.
+    if (Creator.getResponseFilesSupport() != Tool::RF_FileList)
+      OS << "\n";
+    OS << " (end of response file)";
+  }
+
+  OS << Terminator;
+}
+
+void Command::setResponseFile(const char *FileName) {
+  ResponseFile = FileName;
+  ResponseFileFlag = Creator.getResponseFileFlag();
+  ResponseFileFlag += FileName;
+}
+
+int Command::Execute(const StringRef **Redirects, std::string *ErrMsg,
+                     bool *ExecutionFailed) const {
+  SmallVector<const char*, 128> Argv;
+
+  if (ResponseFile == nullptr) {
+    Argv.push_back(Executable);
+    Argv.append(Arguments.begin(), Arguments.end());
+    Argv.push_back(nullptr);
+
+    return llvm::sys::ExecuteAndWait(Executable, Argv.data(), /*env*/ nullptr,
+                                     Redirects, /*secondsToWait*/ 0,
+                                     /*memoryLimit*/ 0, ErrMsg,
+                                     ExecutionFailed);
+  }
+
+  // We need to put arguments in a response file (command is too large)
+  // Open stream to store the response file contents
+  std::string RespContents;
+  llvm::raw_string_ostream SS(RespContents);
+
+  // Write file contents and build the Argv vector
+  writeResponseFile(SS);
+  buildArgvForResponseFile(Argv);
+  Argv.push_back(nullptr);
+  SS.flush();
+
+  // Save the response file in the appropriate encoding
+  if (std::error_code EC = writeFileWithEncoding(
+          ResponseFile, RespContents, Creator.getResponseFileEncoding())) {
+    if (ErrMsg)
+      *ErrMsg = EC.message();
+    if (ExecutionFailed)
+      *ExecutionFailed = true;
+    return -1;
+  }
+
+  return llvm::sys::ExecuteAndWait(Executable, Argv.data(), /*env*/ nullptr,
+                                   Redirects, /*secondsToWait*/ 0,
+                                   /*memoryLimit*/ 0, ErrMsg, ExecutionFailed);
+}
+
+FallbackCommand::FallbackCommand(const Action &Source_, const Tool &Creator_,
+                                 const char *Executable_,
+                                 const ArgStringList &Arguments_,
+                                 std::unique_ptr<Command> Fallback_)
+    : Command(Source_, Creator_, Executable_, Arguments_),
+      Fallback(std::move(Fallback_)) {}
+
+void FallbackCommand::Print(raw_ostream &OS, const char *Terminator,
+                            bool Quote, CrashReportInfo *CrashInfo) const {
+  Command::Print(OS, "", Quote, CrashInfo);
+  OS << " ||";
+  Fallback->Print(OS, Terminator, Quote, CrashInfo);
+}
+
+static bool ShouldFallback(int ExitCode) {
+  // FIXME: We really just want to fall back for internal errors, such
+  // as when some symbol cannot be mangled, when we should be able to
+  // parse something but can't, etc.
+  return ExitCode != 0;
+}
+
+int FallbackCommand::Execute(const StringRef **Redirects, std::string *ErrMsg,
+                             bool *ExecutionFailed) const {
+  int PrimaryStatus = Command::Execute(Redirects, ErrMsg, ExecutionFailed);
+  if (!ShouldFallback(PrimaryStatus))
+    return PrimaryStatus;
+
+  // Clear ExecutionFailed and ErrMsg before falling back.
+  if (ErrMsg)
+    ErrMsg->clear();
+  if (ExecutionFailed)
+    *ExecutionFailed = false;
+
+  const Driver &D = getCreator().getToolChain().getDriver();
+  D.Diag(diag::warn_drv_invoking_fallback) << Fallback->getExecutable();
+
+  int SecondaryStatus = Fallback->Execute(Redirects, ErrMsg, ExecutionFailed);
+  return SecondaryStatus;
+}
+
+JobList::JobList() : Job(JobListClass) {}
+
+void JobList::Print(raw_ostream &OS, const char *Terminator, bool Quote,
+                    CrashReportInfo *CrashInfo) const {
+  for (const auto &Job : *this)
+    Job.Print(OS, Terminator, Quote, CrashInfo);
+}
+
+void JobList::clear() { Jobs.clear(); }