llvm/llvm/lib/CodeGen/CFGuardLongjmp.cpp

//===-- CFGuardLongjmp.cpp - Longjmp symbols for CFGuard --------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file contains a machine function pass to insert a symbol after each
/// call to _setjmp and store this in the MachineFunction's LongjmpTargets
/// vector. This will be used to emit the table of valid longjmp targets used
/// by Control Flow Guard.
///
//===----------------------------------------------------------------------===//

#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/IR/Module.h"
#include "llvm/InitializePasses.h"

usingnamespacellvm;

#define DEBUG_TYPE …

STATISTIC(CFGuardLongjmpTargets,
          "Number of Control Flow Guard longjmp targets");

namespace {

/// MachineFunction pass to insert a symbol after each call to _setjmp and store
/// this in the MachineFunction's LongjmpTargets vector.
class CFGuardLongjmp : public MachineFunctionPass { … };

} // end anonymous namespace

char CFGuardLongjmp::ID = …;

INITIALIZE_PASS(…)
FunctionPass *llvm::createCFGuardLongjmpPass() { … }

bool CFGuardLongjmp::runOnMachineFunction(MachineFunction &MF) { … }