Revert "Introduce the llvm-cfi-verify tool (resubmission of D37937)."

This reverts commit r313798, it's causing buildbot failures.

llvm-svn: 313804

1 files changed, 0 insertions, 241 deletions

diff --git a/llvm/tools/llvm-cfi-verify/llvm-cfi-verify.cpp b/llvm/tools/llvm-cfi-verify/llvm-cfi-verify.cpp
deleted file mode 100644
index 63dc6f128e1..00000000000
--- a/llvm/tools/llvm-cfi-verify/llvm-cfi-verify.cpp
+++ /dev/null
@@ -1,241 +0,0 @@
-//===-- llvm-cfi-verify.cpp - CFI Verification tool for LLVM --------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This tool verifies Control Flow Integrity (CFI) instrumentation by static
-// binary anaylsis. See the design document in /docs/CFIVerify.rst for more
-// information.
-//
-// This tool is currently incomplete. It currently only does disassembly for
-// object files, and searches through the code for indirect control flow
-// instructions, printing them once found.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCDisassembler/MCDisassembler.h"
-#include "llvm/MC/MCInst.h"
-#include "llvm/MC/MCInstPrinter.h"
-#include "llvm/MC/MCInstrAnalysis.h"
-#include "llvm/MC/MCInstrDesc.h"
-#include "llvm/MC/MCInstrInfo.h"
-#include "llvm/MC/MCObjectFileInfo.h"
-#include "llvm/MC/MCRegisterInfo.h"
-#include "llvm/MC/MCSubtargetInfo.h"
-#include "llvm/Object/Binary.h"
-#include "llvm/Object/COFF.h"
-#include "llvm/Object/ObjectFile.h"
-#include "llvm/Support/Casting.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/TargetRegistry.h"
-#include "llvm/Support/TargetSelect.h"
-#include "llvm/Support/raw_ostream.h"
-
-#include <cassert>
-#include <cstdlib>
-
-using namespace llvm;
-using namespace llvm::object;
-
-cl::opt<bool> ArgDumpSymbols("sym", cl::desc("Dump the symbol table."));
-cl::opt<std::string> InputFilename(cl::Positional, cl::desc("<input file>"),
-                                   cl::Required);
-
-static void printSymbols(const ObjectFile *Object) {
-  for (const SymbolRef &Symbol : Object->symbols()) {
-    outs() << "Symbol [" << format_hex_no_prefix(Symbol.getValue(), 2)
-           << "] = ";
-
-    auto SymbolName = Symbol.getName();
-    if (SymbolName)
-      outs() << *SymbolName;
-    else
-      outs() << "UNKNOWN";
-
-    if (Symbol.getFlags() & SymbolRef::SF_Hidden)
-      outs() << " .hidden";
-
-    outs() << " (Section = ";
-
-    auto SymbolSection = Symbol.getSection();
-    if (SymbolSection) {
-      StringRef SymbolSectionName;
-      if ((*SymbolSection)->getName(SymbolSectionName))
-        outs() << "UNKNOWN)";
-      else
-        outs() << SymbolSectionName << ")";
-    } else {
-      outs() << "N/A)";
-    }
-
-    outs() << "\n";
-  }
-}
-
-int main(int argc, char **argv) {
-  cl::ParseCommandLineOptions(argc, argv);
-
-  InitializeAllTargetInfos();
-  InitializeAllTargetMCs();
-  InitializeAllAsmParsers();
-  InitializeAllDisassemblers();
-
-  Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(InputFilename);
-  if (!BinaryOrErr) {
-    errs() << "Failed to open file.\n";
-    return EXIT_FAILURE;
-  }
-
-  Binary &Binary = *BinaryOrErr.get().getBinary();
-  ObjectFile *Object = dyn_cast<ObjectFile>(&Binary);
-  if (!Object) {
-    errs() << "Disassembling of non-objects not currently supported.\n";
-    return EXIT_FAILURE;
-  }
-
-  Triple TheTriple = Object->makeTriple();
-  std::string TripleName = TheTriple.getTriple();
-  std::string ArchName = "";
-  std::string ErrorString;
-
-  const Target *TheTarget =
-      TargetRegistry::lookupTarget(ArchName, TheTriple, ErrorString);
-
-  if (!TheTarget) {
-    errs() << "Couldn't find target \"" << TheTriple.getTriple()
-           << "\", failed with error: " << ErrorString << ".\n";
-    return EXIT_FAILURE;
-  }
-
-  SubtargetFeatures Features = Object->getFeatures();
-
-  std::unique_ptr<const MCRegisterInfo> RegisterInfo(
-      TheTarget->createMCRegInfo(TripleName));
-  if (!RegisterInfo) {
-    errs() << "Failed to initialise RegisterInfo.\n";
-    return EXIT_FAILURE;
-  }
-
-  std::unique_ptr<const MCAsmInfo> AsmInfo(
-      TheTarget->createMCAsmInfo(*RegisterInfo, TripleName));
-  if (!AsmInfo) {
-    errs() << "Failed to initialise AsmInfo.\n";
-    return EXIT_FAILURE;
-  }
-
-  std::string MCPU = "";
-  std::unique_ptr<MCSubtargetInfo> SubtargetInfo(
-      TheTarget->createMCSubtargetInfo(TripleName, MCPU, Features.getString()));
-  if (!SubtargetInfo) {
-    errs() << "Failed to initialise SubtargetInfo.\n";
-    return EXIT_FAILURE;
-  }
-
-  std::unique_ptr<const MCInstrInfo> MII(TheTarget->createMCInstrInfo());
-  if (!MII) {
-    errs() << "Failed to initialise MII.\n";
-    return EXIT_FAILURE;
-  }
-
-  MCObjectFileInfo MOFI;
-  MCContext Context(AsmInfo.get(), RegisterInfo.get(), &MOFI);
-
-  std::unique_ptr<const MCDisassembler> Disassembler(
-      TheTarget->createMCDisassembler(*SubtargetInfo, Context));
-
-  if (!Disassembler) {
-    errs() << "No disassembler available for target.";
-    return EXIT_FAILURE;
-  }
-
-  std::unique_ptr<const MCInstrAnalysis> MIA(
-      TheTarget->createMCInstrAnalysis(MII.get()));
-
-  std::unique_ptr<MCInstPrinter> Printer(
-      TheTarget->createMCInstPrinter(TheTriple, AsmInfo->getAssemblerDialect(),
-                                     *AsmInfo, *MII, *RegisterInfo));
-
-  if (ArgDumpSymbols)
-    printSymbols(Object);
-
-  for (const SectionRef &Section : Object->sections()) {
-    outs() << "Section [" << format_hex_no_prefix(Section.getAddress(), 2)
-           << "] = ";
-    StringRef SectionName;
-
-    if (Section.getName(SectionName))
-      outs() << "UNKNOWN.\n";
-    else
-      outs() << SectionName << "\n";
-
-    StringRef SectionContents;
-    if (Section.getContents(SectionContents)) {
-      errs() << "Failed to retrieve section contents.\n";
-      return EXIT_FAILURE;
-    }
-
-    MCInst Instruction;
-    uint64_t InstructionSize;
-
-    ArrayRef<uint8_t> SectionBytes((const uint8_t *)SectionContents.data(),
-                                   Section.getSize());
-
-    for (uint64_t Byte = 0; Byte < Section.getSize();) {
-      bool BadInstruction = false;
-
-      // Disassemble the instruction.
-      if (Disassembler->getInstruction(
-              Instruction, InstructionSize, SectionBytes.drop_front(Byte), 0,
-              nulls(), outs()) != MCDisassembler::Success) {
-        BadInstruction = true;
-      }
-
-      Byte += InstructionSize;
-
-      if (BadInstruction)
-        continue;
-
-      // Skip instructions that do not affect the control flow.
-      const auto &InstrDesc = MII->get(Instruction.getOpcode());
-      if (!InstrDesc.mayAffectControlFlow(Instruction, *RegisterInfo))
-        continue;
-
-      // Skip instructions that do not operate on register operands.
-      bool UsesRegisterOperand = false;
-      for (const auto &Operand : Instruction) {
-        if (Operand.isReg())
-          UsesRegisterOperand = true;
-      }
-
-      if (!UsesRegisterOperand)
-        continue;
-
-      // Print the instruction address.
-      outs() << "    "
-             << format_hex(Section.getAddress() + Byte - InstructionSize, 2)
-             << ": ";
-
-      // Print the instruction bytes.
-      for (uint64_t i = 0; i < InstructionSize; ++i) {
-        outs() << format_hex_no_prefix(SectionBytes[Byte - InstructionSize + i],
-                                       2)
-               << " ";
-      }
-
-      // Print the instruction.
-      outs() << " | " << MII->getName(Instruction.getOpcode()) << " ";
-      Instruction.dump_pretty(outs(), Printer.get());
-
-      outs() << "\n";
-    }
-  }
-
-  return EXIT_SUCCESS;
-}