Instrumentation.cpp revision 303975
1//===-- Instrumentation.cpp - TransformUtils Infrastructure ---------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the common initialization infrastructure for the 11// Instrumentation library. 12// 13//===----------------------------------------------------------------------===// 14 15#include "llvm/Transforms/Instrumentation.h" 16#include "llvm-c/Initialization.h" 17#include "llvm/IR/IntrinsicInst.h" 18#include "llvm/InitializePasses.h" 19#include "llvm/PassRegistry.h" 20 21using namespace llvm; 22 23/// Moves I before IP. Returns new insert point. 24static BasicBlock::iterator moveBeforeInsertPoint(BasicBlock::iterator I, BasicBlock::iterator IP) { 25 // If I is IP, move the insert point down. 26 if (I == IP) 27 return ++IP; 28 // Otherwise, move I before IP and return IP. 29 I->moveBefore(&*IP); 30 return IP; 31} 32 33/// Instrumentation passes often insert conditional checks into entry blocks. 34/// Call this function before splitting the entry block to move instructions 35/// that must remain in the entry block up before the split point. Static 36/// allocas and llvm.localescape calls, for example, must remain in the entry 37/// block. 38BasicBlock::iterator llvm::PrepareToSplitEntryBlock(BasicBlock &BB, 39 BasicBlock::iterator IP) { 40 assert(&BB.getParent()->getEntryBlock() == &BB); 41 for (auto I = IP, E = BB.end(); I != E; ++I) { 42 bool KeepInEntry = false; 43 if (auto *AI = dyn_cast<AllocaInst>(I)) { 44 if (AI->isStaticAlloca()) 45 KeepInEntry = true; 46 } else if (auto *II = dyn_cast<IntrinsicInst>(I)) { 47 if (II->getIntrinsicID() == llvm::Intrinsic::localescape) 48 KeepInEntry = true; 49 } 50 if (KeepInEntry) 51 IP = moveBeforeInsertPoint(I, IP); 52 } 53 return IP; 54} 55 56/// initializeInstrumentation - Initialize all passes in the TransformUtils 57/// library. 58void llvm::initializeInstrumentation(PassRegistry &Registry) { 59 initializeAddressSanitizerPass(Registry); 60 initializeAddressSanitizerModulePass(Registry); 61 initializeBoundsCheckingPass(Registry); 62 initializeGCOVProfilerPass(Registry); 63 initializePGOInstrumentationGenPass(Registry); 64 initializePGOInstrumentationUsePass(Registry); 65 initializeInstrProfilingPass(Registry); 66 initializeMemorySanitizerPass(Registry); 67 initializeThreadSanitizerPass(Registry); 68 initializeSanitizerCoverageModulePass(Registry); 69 initializeDataFlowSanitizerPass(Registry); 70 initializeSafeStackPass(Registry); 71} 72 73/// LLVMInitializeInstrumentation - C binding for 74/// initializeInstrumentation. 75void LLVMInitializeInstrumentation(LLVMPassRegistryRef R) { 76 initializeInstrumentation(*unwrap(R)); 77} 78