//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "insert-gcov-profiling"
-
#include "llvm/Transforms/Instrumentation.h"
-#include "ProfilingUtils.h"
#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/UniqueVector.h"
-#include "llvm/DebugInfo.h"
+#include "llvm/IR/DebugInfo.h"
+#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/InstIterator.h"
#include "llvm/IR/Instructions.h"
+#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Module.h"
#include "llvm/Pass.h"
+#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
-#include "llvm/Support/DebugLoc.h"
-#include "llvm/Support/InstIterator.h"
-#include "llvm/Support/PathV2.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Path.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Utils/ModuleUtils.h"
+#include <algorithm>
+#include <memory>
#include <string>
#include <utility>
using namespace llvm;
+#define DEBUG_TYPE "insert-gcov-profiling"
+
+static cl::opt<std::string>
+DefaultGCOVVersion("default-gcov-version", cl::init("402*"), cl::Hidden,
+ cl::ValueRequired);
+static cl::opt<bool> DefaultExitBlockBeforeBody("gcov-exit-block-before-body",
+ cl::init(false), cl::Hidden);
+
+GCOVOptions GCOVOptions::getDefault() {
+ GCOVOptions Options;
+ Options.EmitNotes = true;
+ Options.EmitData = true;
+ Options.UseCfgChecksum = false;
+ Options.NoRedZone = false;
+ Options.FunctionNamesInData = true;
+ Options.ExitBlockBeforeBody = DefaultExitBlockBeforeBody;
+
+ if (DefaultGCOVVersion.size() != 4) {
+ llvm::report_fatal_error(std::string("Invalid -default-gcov-version: ") +
+ DefaultGCOVVersion);
+ }
+ memcpy(Options.Version, DefaultGCOVVersion.c_str(), 4);
+ return Options;
+}
+
namespace {
+ class GCOVFunction;
+
class GCOVProfiler : public ModulePass {
public:
static char ID;
- GCOVProfiler()
- : ModulePass(ID), EmitNotes(true), EmitData(true), Use402Format(false),
- UseExtraChecksum(false), NoRedZone(false),
- NoFunctionNamesInData(false) {
- initializeGCOVProfilerPass(*PassRegistry::getPassRegistry());
- }
- GCOVProfiler(bool EmitNotes, bool EmitData, bool Use402Format,
- bool UseExtraChecksum, bool NoRedZone,
- bool NoFunctionNamesInData)
- : ModulePass(ID), EmitNotes(EmitNotes), EmitData(EmitData),
- Use402Format(Use402Format), UseExtraChecksum(UseExtraChecksum),
- NoRedZone(NoRedZone), NoFunctionNamesInData(NoFunctionNamesInData) {
- assert((EmitNotes || EmitData) && "GCOVProfiler asked to do nothing?");
+ GCOVProfiler() : GCOVProfiler(GCOVOptions::getDefault()) {}
+ GCOVProfiler(const GCOVOptions &Opts) : ModulePass(ID), Options(Opts) {
+ assert((Options.EmitNotes || Options.EmitData) &&
+ "GCOVProfiler asked to do nothing?");
+ ReversedVersion[0] = Options.Version[3];
+ ReversedVersion[1] = Options.Version[2];
+ ReversedVersion[2] = Options.Version[1];
+ ReversedVersion[3] = Options.Version[0];
+ ReversedVersion[4] = '\0';
initializeGCOVProfilerPass(*PassRegistry::getPassRegistry());
}
- virtual const char *getPassName() const {
+ const char *getPassName() const override {
return "GCOV Profiler";
}
+
private:
- bool runOnModule(Module &M);
+ bool runOnModule(Module &M) override;
- // Create the GCNO files for the Module based on DebugInfo.
- void emitGCNO();
+ // Create the .gcno files for the Module based on DebugInfo.
+ void emitProfileNotes();
// Modify the program to track transitions along edges and call into the
// profiling runtime to emit .gcda files when run.
Constant *getIncrementIndirectCounterFunc();
Constant *getEmitFunctionFunc();
Constant *getEmitArcsFunc();
+ Constant *getSummaryInfoFunc();
+ Constant *getDeleteWriteoutFunctionListFunc();
+ Constant *getDeleteFlushFunctionListFunc();
Constant *getEndFileFunc();
// Create or retrieve an i32 state value that is used to represent the
// block number.
GlobalVariable *buildEdgeLookupTable(Function *F,
GlobalVariable *Counter,
- const UniqueVector<BasicBlock *> &Preds,
- const UniqueVector<BasicBlock *> &Succs);
+ const UniqueVector<BasicBlock *>&Preds,
+ const UniqueVector<BasicBlock*>&Succs);
// Add the function to write out all our counters to the global destructor
// list.
- void insertCounterWriteout(ArrayRef<std::pair<GlobalVariable*, MDNode*> >);
+ Function *insertCounterWriteout(ArrayRef<std::pair<GlobalVariable*,
+ MDNode*> >);
+ Function *insertFlush(ArrayRef<std::pair<GlobalVariable*, MDNode*> >);
void insertIndirectCounterIncrement();
- void insertFlush(ArrayRef<std::pair<GlobalVariable*, MDNode*> >);
- std::string mangleName(DICompileUnit CU, const char *NewStem);
+ std::string mangleName(const DICompileUnit *CU, const char *NewStem);
+
+ GCOVOptions Options;
- bool EmitNotes;
- bool EmitData;
- bool Use402Format;
- bool UseExtraChecksum;
- bool NoRedZone;
- bool NoFunctionNamesInData;
+ // Reversed, NUL-terminated copy of Options.Version.
+ char ReversedVersion[5];
+ // Checksum, produced by hash of EdgeDestinations
+ SmallVector<uint32_t, 4> FileChecksums;
Module *M;
LLVMContext *Ctx;
+ SmallVector<std::unique_ptr<GCOVFunction>, 16> Funcs;
+ DenseMap<DISubprogram *, Function *> FnMap;
};
}
INITIALIZE_PASS(GCOVProfiler, "insert-gcov-profiling",
"Insert instrumentation for GCOV profiling", false, false)
-ModulePass *llvm::createGCOVProfilerPass(bool EmitNotes, bool EmitData,
- bool Use402Format,
- bool UseExtraChecksum,
- bool NoRedZone,
- bool NoFunctionNamesInData) {
- return new GCOVProfiler(EmitNotes, EmitData, Use402Format, UseExtraChecksum,
- NoRedZone, NoFunctionNamesInData);
+ModulePass *llvm::createGCOVProfilerPass(const GCOVOptions &Options) {
+ return new GCOVProfiler(Options);
+}
+
+static StringRef getFunctionName(const DISubprogram *SP) {
+ if (!SP->getLinkageName().empty())
+ return SP->getLinkageName();
+ return SP->getName();
}
namespace {
class GCOVRecord {
protected:
- static const char *LinesTag;
- static const char *FunctionTag;
- static const char *BlockTag;
- static const char *EdgeTag;
+ static const char *const LinesTag;
+ static const char *const FunctionTag;
+ static const char *const BlockTag;
+ static const char *const EdgeTag;
- GCOVRecord() {}
+ GCOVRecord() = default;
void writeBytes(const char *Bytes, int Size) {
os->write(Bytes, Size);
// Returns the length measured in 4-byte blocks that will be used to
// represent this string in a GCOV file
- unsigned lengthOfGCOVString(StringRef s) {
+ static unsigned lengthOfGCOVString(StringRef s) {
// A GCOV string is a length, followed by a NUL, then between 0 and 3 NULs
// padding out to the next 4-byte word. The length is measured in 4-byte
// words including padding, not bytes of actual string.
raw_ostream *os;
};
- const char *GCOVRecord::LinesTag = "\0\0\x45\x01";
- const char *GCOVRecord::FunctionTag = "\0\0\0\1";
- const char *GCOVRecord::BlockTag = "\0\0\x41\x01";
- const char *GCOVRecord::EdgeTag = "\0\0\x43\x01";
+ const char *const GCOVRecord::LinesTag = "\0\0\x45\x01";
+ const char *const GCOVRecord::FunctionTag = "\0\0\0\1";
+ const char *const GCOVRecord::BlockTag = "\0\0\x41\x01";
+ const char *const GCOVRecord::EdgeTag = "\0\0\x43\x01";
class GCOVFunction;
class GCOVBlock;
class GCOVLines : public GCOVRecord {
public:
void addLine(uint32_t Line) {
+ assert(Line != 0 && "Line zero is not a valid real line number.");
Lines.push_back(Line);
}
- uint32_t length() {
+ uint32_t length() const {
// Here 2 = 1 for string length + 1 for '0' id#.
return lengthOfGCOVString(Filename) + 2 + Lines.size();
}
write(Lines[i]);
}
- GCOVLines(StringRef F, raw_ostream *os)
+ GCOVLines(StringRef F, raw_ostream *os)
: Filename(F) {
this->os = os;
}
SmallVector<uint32_t, 32> Lines;
};
+
// Represent a basic block in GCOV. Each block has a unique number in the
// function, number of lines belonging to each block, and a set of edges to
// other blocks.
void writeOut() {
uint32_t Len = 3;
+ SmallVector<StringMapEntry<GCOVLines *> *, 32> SortedLinesByFile;
for (StringMap<GCOVLines *>::iterator I = LinesByFile.begin(),
E = LinesByFile.end(); I != E; ++I) {
Len += I->second->length();
+ SortedLinesByFile.push_back(&*I);
}
writeBytes(LinesTag, 4);
write(Len);
write(Number);
- for (StringMap<GCOVLines *>::iterator I = LinesByFile.begin(),
- E = LinesByFile.end(); I != E; ++I)
- I->second->writeOut();
+
+ std::sort(SortedLinesByFile.begin(), SortedLinesByFile.end(),
+ [](StringMapEntry<GCOVLines *> *LHS,
+ StringMapEntry<GCOVLines *> *RHS) {
+ return LHS->getKey() < RHS->getKey();
+ });
+ for (SmallVectorImpl<StringMapEntry<GCOVLines *> *>::iterator
+ I = SortedLinesByFile.begin(), E = SortedLinesByFile.end();
+ I != E; ++I)
+ (*I)->getValue()->writeOut();
write(0);
write(0);
}
DeleteContainerSeconds(LinesByFile);
}
+ GCOVBlock(const GCOVBlock &RHS) : GCOVRecord(RHS), Number(RHS.Number) {
+ // Only allow copy before edges and lines have been added. After that,
+ // there are inter-block pointers (eg: edges) that won't take kindly to
+ // blocks being copied or moved around.
+ assert(LinesByFile.empty());
+ assert(OutEdges.empty());
+ }
+
private:
friend class GCOVFunction;
// object users can construct, the blocks and lines will be rooted here.
class GCOVFunction : public GCOVRecord {
public:
- GCOVFunction(DISubprogram SP, raw_ostream *os,
- bool Use402Format, bool UseExtraChecksum) {
+ GCOVFunction(const DISubprogram *SP, Function *F, raw_ostream *os,
+ uint32_t Ident, bool UseCfgChecksum, bool ExitBlockBeforeBody)
+ : SP(SP), Ident(Ident), UseCfgChecksum(UseCfgChecksum), CfgChecksum(0),
+ ReturnBlock(1, os) {
this->os = os;
- Function *F = SP.getFunction();
- DEBUG(dbgs() << "Function: " << F->getName() << "\n");
+ DEBUG(dbgs() << "Function: " << getFunctionName(SP) << "\n");
+
uint32_t i = 0;
- for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
- Blocks[BB] = new GCOVBlock(i++, os);
+ for (auto &BB : *F) {
+ // Skip index 1 if it's assigned to the ReturnBlock.
+ if (i == 1 && ExitBlockBeforeBody)
+ ++i;
+ Blocks.insert(std::make_pair(&BB, GCOVBlock(i++, os)));
}
- ReturnBlock = new GCOVBlock(i++, os);
+ if (!ExitBlockBeforeBody)
+ ReturnBlock.Number = i;
+
+ std::string FunctionNameAndLine;
+ raw_string_ostream FNLOS(FunctionNameAndLine);
+ FNLOS << getFunctionName(SP) << SP->getLine();
+ FNLOS.flush();
+ FuncChecksum = hash_value(FunctionNameAndLine);
+ }
- writeBytes(FunctionTag, 4);
- uint32_t BlockLen = 1 + 1 + 1 + lengthOfGCOVString(SP.getName()) +
- 1 + lengthOfGCOVString(SP.getFilename()) + 1;
- if (UseExtraChecksum)
- ++BlockLen;
- write(BlockLen);
- uint32_t Ident = reinterpret_cast<intptr_t>((MDNode*)SP);
- write(Ident);
- write(0); // lineno checksum
- if (UseExtraChecksum)
- write(0); // cfg checksum
- writeGCOVString(SP.getName());
- writeGCOVString(SP.getFilename());
- write(SP.getLineNumber());
+ GCOVBlock &getBlock(BasicBlock *BB) {
+ return Blocks.find(BB)->second;
}
- ~GCOVFunction() {
- DeleteContainerSeconds(Blocks);
- delete ReturnBlock;
+ GCOVBlock &getReturnBlock() {
+ return ReturnBlock;
}
- GCOVBlock &getBlock(BasicBlock *BB) {
- return *Blocks[BB];
+ std::string getEdgeDestinations() {
+ std::string EdgeDestinations;
+ raw_string_ostream EDOS(EdgeDestinations);
+ Function *F = Blocks.begin()->first->getParent();
+ for (BasicBlock &I : *F) {
+ GCOVBlock &Block = getBlock(&I);
+ for (int i = 0, e = Block.OutEdges.size(); i != e; ++i)
+ EDOS << Block.OutEdges[i]->Number;
+ }
+ return EdgeDestinations;
}
- GCOVBlock &getReturnBlock() {
- return *ReturnBlock;
+ uint32_t getFuncChecksum() {
+ return FuncChecksum;
+ }
+
+ void setCfgChecksum(uint32_t Checksum) {
+ CfgChecksum = Checksum;
}
void writeOut() {
+ writeBytes(FunctionTag, 4);
+ uint32_t BlockLen = 1 + 1 + 1 + lengthOfGCOVString(getFunctionName(SP)) +
+ 1 + lengthOfGCOVString(SP->getFilename()) + 1;
+ if (UseCfgChecksum)
+ ++BlockLen;
+ write(BlockLen);
+ write(Ident);
+ write(FuncChecksum);
+ if (UseCfgChecksum)
+ write(CfgChecksum);
+ writeGCOVString(getFunctionName(SP));
+ writeGCOVString(SP->getFilename());
+ write(SP->getLine());
+
// Emit count of blocks.
writeBytes(BlockTag, 4);
write(Blocks.size() + 1);
DEBUG(dbgs() << Blocks.size() << " blocks.\n");
// Emit edges between blocks.
- for (DenseMap<BasicBlock *, GCOVBlock *>::iterator I = Blocks.begin(),
- E = Blocks.end(); I != E; ++I) {
- GCOVBlock &Block = *I->second;
+ if (Blocks.empty()) return;
+ Function *F = Blocks.begin()->first->getParent();
+ for (BasicBlock &I : *F) {
+ GCOVBlock &Block = getBlock(&I);
if (Block.OutEdges.empty()) continue;
writeBytes(EdgeTag, 4);
}
// Emit lines for each block.
- for (DenseMap<BasicBlock *, GCOVBlock *>::iterator I = Blocks.begin(),
- E = Blocks.end(); I != E; ++I) {
- I->second->writeOut();
- }
+ for (BasicBlock &I : *F)
+ getBlock(&I).writeOut();
}
private:
- DenseMap<BasicBlock *, GCOVBlock *> Blocks;
- GCOVBlock *ReturnBlock;
+ const DISubprogram *SP;
+ uint32_t Ident;
+ uint32_t FuncChecksum;
+ bool UseCfgChecksum;
+ uint32_t CfgChecksum;
+ DenseMap<BasicBlock *, GCOVBlock> Blocks;
+ GCOVBlock ReturnBlock;
};
}
-std::string GCOVProfiler::mangleName(DICompileUnit CU, const char *NewStem) {
+std::string GCOVProfiler::mangleName(const DICompileUnit *CU,
+ const char *NewStem) {
if (NamedMDNode *GCov = M->getNamedMetadata("llvm.gcov")) {
for (int i = 0, e = GCov->getNumOperands(); i != e; ++i) {
MDNode *N = GCov->getOperand(i);
}
}
- SmallString<128> Filename = CU.getFilename();
+ SmallString<128> Filename = CU->getFilename();
sys::path::replace_extension(Filename, NewStem);
- return sys::path::filename(Filename.str());
+ StringRef FName = sys::path::filename(Filename);
+ SmallString<128> CurPath;
+ if (sys::fs::current_path(CurPath)) return FName;
+ sys::path::append(CurPath, FName);
+ return CurPath.str();
}
bool GCOVProfiler::runOnModule(Module &M) {
this->M = &M;
Ctx = &M.getContext();
- if (EmitNotes) emitGCNO();
- if (EmitData) return emitProfileArcs();
+ FnMap.clear();
+ for (Function &F : M) {
+ if (DISubprogram *SP = F.getSubprogram())
+ FnMap[SP] = &F;
+ }
+
+ if (Options.EmitNotes) emitProfileNotes();
+ if (Options.EmitData) return emitProfileArcs();
+ return false;
+}
+
+static bool functionHasLines(Function *F) {
+ // Check whether this function actually has any source lines. Not only
+ // do these waste space, they also can crash gcov.
+ for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
+ for (BasicBlock::iterator I = BB->begin(), IE = BB->end();
+ I != IE; ++I) {
+ // Debug intrinsic locations correspond to the location of the
+ // declaration, not necessarily any statements or expressions.
+ if (isa<DbgInfoIntrinsic>(I)) continue;
+
+ const DebugLoc &Loc = I->getDebugLoc();
+ if (!Loc)
+ continue;
+
+ // Artificial lines such as calls to the global constructors.
+ if (Loc.getLine() == 0) continue;
+
+ return true;
+ }
+ }
return false;
}
-void GCOVProfiler::emitGCNO() {
+void GCOVProfiler::emitProfileNotes() {
NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
if (!CU_Nodes) return;
// this pass over the original .o's as they're produced, or run it after
// LTO, we'll generate the same .gcno files.
- DICompileUnit CU(CU_Nodes->getOperand(i));
- std::string ErrorInfo;
- raw_fd_ostream out(mangleName(CU, "gcno").c_str(), ErrorInfo,
- raw_fd_ostream::F_Binary);
- if (!Use402Format)
- out.write("oncg*404MVLL", 12);
- else
- out.write("oncg*204MVLL", 12);
-
- DIArray SPs = CU.getSubprograms();
- for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i) {
- DISubprogram SP(SPs.getElement(i));
- if (!SP.Verify()) continue;
-
- Function *F = SP.getFunction();
+ auto *CU = cast<DICompileUnit>(CU_Nodes->getOperand(i));
+ std::error_code EC;
+ raw_fd_ostream out(mangleName(CU, "gcno"), EC, sys::fs::F_None);
+ std::string EdgeDestinations;
+
+ unsigned FunctionIdent = 0;
+ for (auto *SP : CU->getSubprograms()) {
+ Function *F = FnMap[SP];
if (!F) continue;
- GCOVFunction Func(SP, &out, Use402Format, UseExtraChecksum);
+ if (!functionHasLines(F)) continue;
+
+ // gcov expects every function to start with an entry block that has a
+ // single successor, so split the entry block to make sure of that.
+ BasicBlock &EntryBlock = F->getEntryBlock();
+ BasicBlock::iterator It = EntryBlock.begin();
+ while (isa<AllocaInst>(*It) || isa<DbgInfoIntrinsic>(*It))
+ ++It;
+ EntryBlock.splitBasicBlock(It);
+
+ Funcs.push_back(make_unique<GCOVFunction>(SP, F, &out, FunctionIdent++,
+ Options.UseCfgChecksum,
+ Options.ExitBlockBeforeBody));
+ GCOVFunction &Func = *Funcs.back();
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
- GCOVBlock &Block = Func.getBlock(BB);
+ GCOVBlock &Block = Func.getBlock(&*BB);
TerminatorInst *TI = BB->getTerminator();
if (int successors = TI->getNumSuccessors()) {
for (int i = 0; i != successors; ++i) {
uint32_t Line = 0;
for (BasicBlock::iterator I = BB->begin(), IE = BB->end();
I != IE; ++I) {
+ // Debug intrinsic locations correspond to the location of the
+ // declaration, not necessarily any statements or expressions.
+ if (isa<DbgInfoIntrinsic>(I)) continue;
+
const DebugLoc &Loc = I->getDebugLoc();
- if (Loc.isUnknown()) continue;
+ if (!Loc)
+ continue;
+
+ // Artificial lines such as calls to the global constructors.
+ if (Loc.getLine() == 0) continue;
+
if (Line == Loc.getLine()) continue;
Line = Loc.getLine();
- if (SP != getDISubprogram(Loc.getScope(*Ctx))) continue;
+ if (SP != getDISubprogram(Loc.getScope()))
+ continue;
- GCOVLines &Lines = Block.getFile(SP.getFilename());
+ GCOVLines &Lines = Block.getFile(SP->getFilename());
Lines.addLine(Loc.getLine());
}
}
- Func.writeOut();
+ EdgeDestinations += Func.getEdgeDestinations();
+ }
+
+ FileChecksums.push_back(hash_value(EdgeDestinations));
+ out.write("oncg", 4);
+ out.write(ReversedVersion, 4);
+ out.write(reinterpret_cast<char*>(&FileChecksums.back()), 4);
+
+ for (auto &Func : Funcs) {
+ Func->setCfgChecksum(FileChecksums.back());
+ Func->writeOut();
}
+
out.write("\0\0\0\0\0\0\0\0", 8); // EOF
out.close();
}
NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
if (!CU_Nodes) return false;
- bool Result = false;
+ bool Result = false;
bool InsertIndCounterIncrCode = false;
for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
- DICompileUnit CU(CU_Nodes->getOperand(i));
- DIArray SPs = CU.getSubprograms();
+ auto *CU = cast<DICompileUnit>(CU_Nodes->getOperand(i));
SmallVector<std::pair<GlobalVariable *, MDNode *>, 8> CountersBySP;
- for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i) {
- DISubprogram SP(SPs.getElement(i));
- if (!SP.Verify()) continue;
- Function *F = SP.getFunction();
+ for (auto *SP : CU->getSubprograms()) {
+ Function *F = FnMap[SP];
if (!F) continue;
+ if (!functionHasLines(F)) continue;
if (!Result) Result = true;
unsigned Edges = 0;
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
else
Edges += TI->getNumSuccessors();
}
-
+
ArrayType *CounterTy =
ArrayType::get(Type::getInt64Ty(*Ctx), Edges);
GlobalVariable *Counters =
GlobalValue::InternalLinkage,
Constant::getNullValue(CounterTy),
"__llvm_gcov_ctr");
- CountersBySP.push_back(std::make_pair(Counters, (MDNode*)SP));
-
+ CountersBySP.push_back(std::make_pair(Counters, SP));
+
UniqueVector<BasicBlock *> ComplexEdgePreds;
UniqueVector<BasicBlock *> ComplexEdgeSuccs;
-
+
unsigned Edge = 0;
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
TerminatorInst *TI = BB->getTerminator();
int Successors = isa<ReturnInst>(TI) ? 1 : TI->getNumSuccessors();
if (Successors) {
- IRBuilder<> Builder(TI);
-
if (Successors == 1) {
+ IRBuilder<> Builder(&*BB->getFirstInsertionPt());
Value *Counter = Builder.CreateConstInBoundsGEP2_64(Counters, 0,
Edge);
Value *Count = Builder.CreateLoad(Counter);
Count = Builder.CreateAdd(Count, Builder.getInt64(1));
Builder.CreateStore(Count, Counter);
} else if (BranchInst *BI = dyn_cast<BranchInst>(TI)) {
+ IRBuilder<> Builder(BI);
Value *Sel = Builder.CreateSelect(BI->getCondition(),
Builder.getInt64(Edge),
Builder.getInt64(Edge + 1));
SmallVector<Value *, 2> Idx;
Idx.push_back(Builder.getInt64(0));
Idx.push_back(Sel);
- Value *Counter = Builder.CreateInBoundsGEP(Counters, Idx);
+ Value *Counter = Builder.CreateInBoundsGEP(Counters->getValueType(),
+ Counters, Idx);
Value *Count = Builder.CreateLoad(Counter);
Count = Builder.CreateAdd(Count, Builder.getInt64(1));
Builder.CreateStore(Count, Counter);
} else {
- ComplexEdgePreds.insert(BB);
+ ComplexEdgePreds.insert(&*BB);
for (int i = 0; i != Successors; ++i)
ComplexEdgeSuccs.insert(TI->getSuccessor(i));
}
+
Edge += Successors;
}
}
-
+
if (!ComplexEdgePreds.empty()) {
GlobalVariable *EdgeTable =
buildEdgeLookupTable(F, Counters,
ComplexEdgePreds, ComplexEdgeSuccs);
GlobalVariable *EdgeState = getEdgeStateValue();
-
+
for (int i = 0, e = ComplexEdgePreds.size(); i != e; ++i) {
- IRBuilder<> Builder(ComplexEdgePreds[i+1]->getTerminator());
+ IRBuilder<> Builder(&*ComplexEdgePreds[i + 1]->getFirstInsertionPt());
Builder.CreateStore(Builder.getInt32(i), EdgeState);
}
+
for (int i = 0, e = ComplexEdgeSuccs.size(); i != e; ++i) {
- // call runtime to perform increment
- BasicBlock::iterator InsertPt =
- ComplexEdgeSuccs[i+1]->getFirstInsertionPt();
- IRBuilder<> Builder(InsertPt);
+ // Call runtime to perform increment.
+ IRBuilder<> Builder(&*ComplexEdgeSuccs[i + 1]->getFirstInsertionPt());
Value *CounterPtrArray =
Builder.CreateConstInBoundsGEP2_64(EdgeTable, 0,
i * ComplexEdgePreds.size());
// Build code to increment the counter.
InsertIndCounterIncrCode = true;
- Builder.CreateCall2(getIncrementIndirectCounterFunc(),
- EdgeState, CounterPtrArray);
+ Builder.CreateCall(getIncrementIndirectCounterFunc(),
+ {EdgeState, CounterPtrArray});
}
}
}
- insertCounterWriteout(CountersBySP);
- insertFlush(CountersBySP);
+ Function *WriteoutF = insertCounterWriteout(CountersBySP);
+ Function *FlushF = insertFlush(CountersBySP);
+
+ // Create a small bit of code that registers the "__llvm_gcov_writeout" to
+ // be executed at exit and the "__llvm_gcov_flush" function to be executed
+ // when "__gcov_flush" is called.
+ FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+ Function *F = Function::Create(FTy, GlobalValue::InternalLinkage,
+ "__llvm_gcov_init", M);
+ F->setUnnamedAddr(true);
+ F->setLinkage(GlobalValue::InternalLinkage);
+ F->addFnAttr(Attribute::NoInline);
+ if (Options.NoRedZone)
+ F->addFnAttr(Attribute::NoRedZone);
+
+ BasicBlock *BB = BasicBlock::Create(*Ctx, "entry", F);
+ IRBuilder<> Builder(BB);
+
+ FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+ Type *Params[] = {
+ PointerType::get(FTy, 0),
+ PointerType::get(FTy, 0)
+ };
+ FTy = FunctionType::get(Builder.getVoidTy(), Params, false);
+
+ // Initialize the environment and register the local writeout and flush
+ // functions.
+ Constant *GCOVInit = M->getOrInsertFunction("llvm_gcov_init", FTy);
+ Builder.CreateCall(GCOVInit, {WriteoutF, FlushF});
+ Builder.CreateRetVoid();
+
+ appendToGlobalCtors(*M, F, 0);
}
if (InsertIndCounterIncrCode)
Type *Int64PtrTy = Type::getInt64PtrTy(*Ctx);
ArrayType *EdgeTableTy = ArrayType::get(Int64PtrTy, TableSize);
- OwningArrayPtr<Constant *> EdgeTable(new Constant*[TableSize]);
+ std::unique_ptr<Constant * []> EdgeTable(new Constant *[TableSize]);
Constant *NullValue = Constant::getNullValue(Int64PtrTy);
for (size_t i = 0; i != TableSize; ++i)
EdgeTable[i] = NullValue;
IRBuilder<> Builder(Succ);
Value *Counter = Builder.CreateConstInBoundsGEP2_64(Counters, 0,
Edge + i);
- EdgeTable[((Succs.idFor(Succ)-1) * Preds.size()) +
- (Preds.idFor(BB)-1)] = cast<Constant>(Counter);
+ EdgeTable[((Succs.idFor(Succ) - 1) * Preds.size()) +
+ (Preds.idFor(&*BB) - 1)] = cast<Constant>(Counter);
}
}
Edge += Successors;
}
- ArrayRef<Constant*> V(&EdgeTable[0], TableSize);
GlobalVariable *EdgeTableGV =
new GlobalVariable(
*M, EdgeTableTy, true, GlobalValue::InternalLinkage,
- ConstantArray::get(EdgeTableTy, V),
+ ConstantArray::get(EdgeTableTy,
+ makeArrayRef(&EdgeTable[0],TableSize)),
"__llvm_gcda_edge_table");
EdgeTableGV->setUnnamedAddr(true);
return EdgeTableGV;
}
Constant *GCOVProfiler::getStartFileFunc() {
- FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx),
- Type::getInt8PtrTy(*Ctx), false);
+ Type *Args[] = {
+ Type::getInt8PtrTy(*Ctx), // const char *orig_filename
+ Type::getInt8PtrTy(*Ctx), // const char version[4]
+ Type::getInt32Ty(*Ctx), // uint32_t checksum
+ };
+ FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false);
return M->getOrInsertFunction("llvm_gcda_start_file", FTy);
}
}
Constant *GCOVProfiler::getEmitFunctionFunc() {
- Type *Args[2] = {
+ Type *Args[] = {
Type::getInt32Ty(*Ctx), // uint32_t ident
Type::getInt8PtrTy(*Ctx), // const char *function_name
+ Type::getInt32Ty(*Ctx), // uint32_t func_checksum
+ Type::getInt8Ty(*Ctx), // uint8_t use_extra_checksum
+ Type::getInt32Ty(*Ctx), // uint32_t cfg_checksum
};
FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false);
return M->getOrInsertFunction("llvm_gcda_emit_function", FTy);
Type::getInt32Ty(*Ctx), // uint32_t num_counters
Type::getInt64PtrTy(*Ctx), // uint64_t *counters
};
- FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx),
- Args, false);
+ FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false);
return M->getOrInsertFunction("llvm_gcda_emit_arcs", FTy);
}
+Constant *GCOVProfiler::getSummaryInfoFunc() {
+ FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+ return M->getOrInsertFunction("llvm_gcda_summary_info", FTy);
+}
+
+Constant *GCOVProfiler::getDeleteWriteoutFunctionListFunc() {
+ FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+ return M->getOrInsertFunction("llvm_delete_writeout_function_list", FTy);
+}
+
+Constant *GCOVProfiler::getDeleteFlushFunctionListFunc() {
+ FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+ return M->getOrInsertFunction("llvm_delete_flush_function_list", FTy);
+}
+
Constant *GCOVProfiler::getEndFileFunc() {
FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
return M->getOrInsertFunction("llvm_gcda_end_file", FTy);
return GV;
}
-void GCOVProfiler::insertCounterWriteout(
+Function *GCOVProfiler::insertCounterWriteout(
ArrayRef<std::pair<GlobalVariable *, MDNode *> > CountersBySP) {
FunctionType *WriteoutFTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
Function *WriteoutF = M->getFunction("__llvm_gcov_writeout");
"__llvm_gcov_writeout", M);
WriteoutF->setUnnamedAddr(true);
WriteoutF->addFnAttr(Attribute::NoInline);
- if (NoRedZone)
+ if (Options.NoRedZone)
WriteoutF->addFnAttr(Attribute::NoRedZone);
BasicBlock *BB = BasicBlock::Create(*Ctx, "entry", WriteoutF);
Constant *StartFile = getStartFileFunc();
Constant *EmitFunction = getEmitFunctionFunc();
Constant *EmitArcs = getEmitArcsFunc();
+ Constant *SummaryInfo = getSummaryInfoFunc();
Constant *EndFile = getEndFileFunc();
NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
if (CU_Nodes) {
for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
- DICompileUnit CU(CU_Nodes->getOperand(i));
+ auto *CU = cast<DICompileUnit>(CU_Nodes->getOperand(i));
std::string FilenameGcda = mangleName(CU, "gcda");
+ uint32_t CfgChecksum = FileChecksums.empty() ? 0 : FileChecksums[i];
Builder.CreateCall(StartFile,
- Builder.CreateGlobalStringPtr(FilenameGcda));
- for (ArrayRef<std::pair<GlobalVariable *, MDNode *> >::iterator
- I = CountersBySP.begin(), E = CountersBySP.end();
- I != E; ++I) {
- DISubprogram SP(I->second);
- intptr_t ident = reinterpret_cast<intptr_t>(I->second);
- Builder.CreateCall2(EmitFunction,
- Builder.getInt32(ident),
- NoFunctionNamesInData ?
- Constant::getNullValue(Builder.getInt8PtrTy()) :
- Builder.CreateGlobalStringPtr(SP.getName()));
-
- GlobalVariable *GV = I->first;
+ {Builder.CreateGlobalStringPtr(FilenameGcda),
+ Builder.CreateGlobalStringPtr(ReversedVersion),
+ Builder.getInt32(CfgChecksum)});
+ for (unsigned j = 0, e = CountersBySP.size(); j != e; ++j) {
+ auto *SP = cast_or_null<DISubprogram>(CountersBySP[j].second);
+ uint32_t FuncChecksum = Funcs.empty() ? 0 : Funcs[j]->getFuncChecksum();
+ Builder.CreateCall(
+ EmitFunction,
+ {Builder.getInt32(j),
+ Options.FunctionNamesInData
+ ? Builder.CreateGlobalStringPtr(getFunctionName(SP))
+ : Constant::getNullValue(Builder.getInt8PtrTy()),
+ Builder.getInt32(FuncChecksum),
+ Builder.getInt8(Options.UseCfgChecksum),
+ Builder.getInt32(CfgChecksum)});
+
+ GlobalVariable *GV = CountersBySP[j].first;
unsigned Arcs =
cast<ArrayType>(GV->getType()->getElementType())->getNumElements();
- Builder.CreateCall2(EmitArcs,
- Builder.getInt32(Arcs),
- Builder.CreateConstGEP2_64(GV, 0, 0));
+ Builder.CreateCall(EmitArcs, {Builder.getInt32(Arcs),
+ Builder.CreateConstGEP2_64(GV, 0, 0)});
}
- Builder.CreateCall(EndFile);
+ Builder.CreateCall(SummaryInfo, {});
+ Builder.CreateCall(EndFile, {});
}
}
- Builder.CreateRetVoid();
- // Create a small bit of code that registers the "__llvm_gcov_writeout"
- // function to be executed at exit.
- FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
- Function *F = Function::Create(FTy, GlobalValue::InternalLinkage,
- "__llvm_gcov_init", M);
- F->setUnnamedAddr(true);
- F->setLinkage(GlobalValue::InternalLinkage);
- F->addFnAttr(Attribute::NoInline);
- if (NoRedZone)
- F->addFnAttr(Attribute::NoRedZone);
-
- BB = BasicBlock::Create(*Ctx, "entry", F);
- Builder.SetInsertPoint(BB);
-
- FTy = FunctionType::get(Builder.getInt32Ty(),
- PointerType::get(FTy, 0), false);
- Constant *AtExitFn = M->getOrInsertFunction("atexit", FTy);
- Builder.CreateCall(AtExitFn, WriteoutF);
Builder.CreateRetVoid();
-
- appendToGlobalCtors(*M, F, 0);
+ return WriteoutF;
}
void GCOVProfiler::insertIndirectCounterIncrement() {
Fn->setUnnamedAddr(true);
Fn->setLinkage(GlobalValue::InternalLinkage);
Fn->addFnAttr(Attribute::NoInline);
- if (NoRedZone)
+ if (Options.NoRedZone)
Fn->addFnAttr(Attribute::NoRedZone);
// Create basic blocks for function.
// uint32_t pred = *predecessor;
// if (pred == 0xffffffff) return;
- Argument *Arg = Fn->arg_begin();
+ Argument *Arg = &*Fn->arg_begin();
Arg->setName("predecessor");
Value *Pred = Builder.CreateLoad(Arg, "pred");
Value *Cond = Builder.CreateICmpEQ(Pred, Builder.getInt32(0xffffffff));
// uint64_t *counter = counters[pred];
// if (!counter) return;
Value *ZExtPred = Builder.CreateZExt(Pred, Builder.getInt64Ty());
- Arg = llvm::next(Fn->arg_begin());
+ Arg = &*std::next(Fn->arg_begin());
Arg->setName("counters");
- Value *GEP = Builder.CreateGEP(Arg, ZExtPred);
+ Value *GEP = Builder.CreateGEP(Type::getInt64PtrTy(*Ctx), Arg, ZExtPred);
Value *Counter = Builder.CreateLoad(GEP, "counter");
Cond = Builder.CreateICmpEQ(Counter,
Constant::getNullValue(
Builder.CreateRetVoid();
}
-void GCOVProfiler::
+Function *GCOVProfiler::
insertFlush(ArrayRef<std::pair<GlobalVariable*, MDNode*> > CountersBySP) {
FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
- Function *FlushF = M->getFunction("__gcov_flush");
+ Function *FlushF = M->getFunction("__llvm_gcov_flush");
if (!FlushF)
FlushF = Function::Create(FTy, GlobalValue::InternalLinkage,
- "__gcov_flush", M);
+ "__llvm_gcov_flush", M);
else
FlushF->setLinkage(GlobalValue::InternalLinkage);
FlushF->setUnnamedAddr(true);
FlushF->addFnAttr(Attribute::NoInline);
- if (NoRedZone)
+ if (Options.NoRedZone)
FlushF->addFnAttr(Attribute::NoRedZone);
BasicBlock *Entry = BasicBlock::Create(*Ctx, "entry", FlushF);
assert(WriteoutF && "Need to create the writeout function first!");
IRBuilder<> Builder(Entry);
- Builder.CreateCall(WriteoutF);
+ Builder.CreateCall(WriteoutF, {});
// Zero out the counters.
for (ArrayRef<std::pair<GlobalVariable *, MDNode *> >::iterator
if (RetTy == Type::getVoidTy(*Ctx))
Builder.CreateRetVoid();
else if (RetTy->isIntegerTy())
- // Used if __gcov_flush was implicitly declared.
+ // Used if __llvm_gcov_flush was implicitly declared.
Builder.CreateRet(ConstantInt::get(RetTy, 0));
else
- report_fatal_error("invalid return type for __gcov_flush");
+ report_fatal_error("invalid return type for __llvm_gcov_flush");
+
+ return FlushF;
}