llvm/llvm/lib/Transforms/IPO/CrossDSOCFI.cpp

//===-- CrossDSOCFI.cpp - Externalize this module's CFI checks ------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This pass exports all llvm.bitset's found in the module in the form of a
// __cfi_check function, which can be used to verify cross-DSO call targets.
//
//===----------------------------------------------------------------------===//

#include "llvm/Transforms/IPO/CrossDSOCFI.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalObject.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/IR/Module.h"
#include "llvm/TargetParser/Triple.h"
#include "llvm/Transforms/IPO.h"

usingnamespacellvm;

#define DEBUG_TYPE …

STATISTIC(NumTypeIds, "Number of unique type identifiers");

namespace {

struct CrossDSOCFI { … };

} // anonymous namespace

/// Extracts a numeric type identifier from an MDNode containing type metadata.
ConstantInt *CrossDSOCFI::extractNumericTypeId(MDNode *MD) { … }

/// buildCFICheck - emits __cfi_check for the current module.
void CrossDSOCFI::buildCFICheck(Module &M) { … }

bool CrossDSOCFI::runOnModule(Module &M) { … }

PreservedAnalyses CrossDSOCFIPass::run(Module &M, ModuleAnalysisManager &AM) { … }