#include "llvm/IR/Instructions.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/FileSystem.h"
#include "llvm/Support/InstIterator.h"
-#include "llvm/Support/PathV2.h"
+#include "llvm/Support/Path.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Utils/ModuleUtils.h"
+#include <algorithm>
#include <string>
#include <utility>
using namespace llvm;
+static cl::opt<std::string>
+DefaultGCOVVersion("default-gcov-version", cl::init("402*"), cl::Hidden,
+ cl::ValueRequired);
+
+GCOVOptions GCOVOptions::getDefault() {
+ GCOVOptions Options;
+ Options.EmitNotes = true;
+ Options.EmitData = true;
+ Options.UseCfgChecksum = false;
+ Options.NoRedZone = false;
+ Options.FunctionNamesInData = true;
+
+ 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 GCOVProfiler : public ModulePass {
public:
static char ID;
- GCOVProfiler()
- : ModulePass(ID), EmitNotes(true), EmitData(true),
- UseExtraChecksum(false), NoRedZone(false),
- NoFunctionNamesInData(false) {
- memcpy(Version, DefaultGCovVersion, 4);
+ GCOVProfiler() : ModulePass(ID), Options(GCOVOptions::getDefault()) {
+ 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());
}
- GCOVProfiler(bool EmitNotes, bool EmitData, const char (&Version)[4],
- bool UseExtraChecksum, bool NoRedZone,
- bool NoFunctionNamesInData)
- : ModulePass(ID), EmitNotes(EmitNotes), EmitData(EmitData),
- UseExtraChecksum(UseExtraChecksum), NoRedZone(NoRedZone),
- NoFunctionNamesInData(NoFunctionNamesInData) {
- memcpy(this->Version, Version, 4);
- assert((EmitNotes || EmitData) && "GCOVProfiler asked to do nothing?");
+ GCOVProfiler(const GCOVOptions &Options) : ModulePass(ID), Options(Options){
+ 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 {
return "GCOV Profiler";
}
+
private:
bool runOnModule(Module &M);
Constant *getIncrementIndirectCounterFunc();
Constant *getEmitFunctionFunc();
Constant *getEmitArcsFunc();
+ Constant *getDeleteWriteoutFunctionListFunc();
+ Constant *getDeleteFlushFunctionListFunc();
Constant *getEndFileFunc();
// Create or retrieve an i32 state value that is used to represent the
// 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);
- bool EmitNotes;
- bool EmitData;
- char Version[4]; // This is stored in reverse order for direct emission.
- bool UseExtraChecksum;
- bool NoRedZone;
- bool NoFunctionNamesInData;
+ GCOVOptions Options;
+
+ // Reversed, NUL-terminated copy of Options.Version.
+ char ReversedVersion[5];
Module *M;
LLVMContext *Ctx;
INITIALIZE_PASS(GCOVProfiler, "insert-gcov-profiling",
"Insert instrumentation for GCOV profiling", false, false)
-ModulePass *llvm::createGCOVProfilerPass(bool EmitNotes, bool EmitData,
- const char (&Version)[4],
- bool UseExtraChecksum,
- bool NoRedZone,
- bool NoFunctionNamesInData) {
- return new GCOVProfiler(EmitNotes, EmitData, Version, UseExtraChecksum,
- NoRedZone, NoFunctionNamesInData);
+ModulePass *llvm::createGCOVProfilerPass(const GCOVOptions &Options) {
+ return new GCOVProfiler(Options);
+}
+
+static std::string getFunctionName(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() {}
// 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;
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();
}
SmallVector<uint32_t, 32> Lines;
};
+
+ // Sorting function for deterministic behaviour in GCOVBlock::writeOut.
+ struct StringKeySort {
+ bool operator()(StringMapEntry<GCOVLines *> *LHS,
+ StringMapEntry<GCOVLines *> *RHS) const {
+ return LHS->getKey() < RHS->getKey();
+ }
+ };
+
// 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();
+
+ StringKeySort Sorter;
+ std::sort(SortedLinesByFile.begin(), SortedLinesByFile.end(), Sorter);
+ for (SmallVectorImpl<StringMapEntry<GCOVLines *> *>::iterator
+ I = SortedLinesByFile.begin(), E = SortedLinesByFile.end();
+ I != E; ++I)
+ (*I)->getValue()->writeOut();
write(0);
write(0);
}
class GCOVFunction : public GCOVRecord {
public:
GCOVFunction(DISubprogram SP, raw_ostream *os, uint32_t Ident,
- bool UseExtraChecksum) {
+ bool UseCfgChecksum) {
this->os = os;
Function *F = SP.getFunction();
ReturnBlock = new GCOVBlock(i++, os);
writeBytes(FunctionTag, 4);
- uint32_t BlockLen = 1 + 1 + 1 + lengthOfGCOVString(SP.getName()) +
+ uint32_t BlockLen = 1 + 1 + 1 + lengthOfGCOVString(getFunctionName(SP)) +
1 + lengthOfGCOVString(SP.getFilename()) + 1;
- if (UseExtraChecksum)
+ if (UseCfgChecksum)
++BlockLen;
write(BlockLen);
write(Ident);
write(0); // lineno checksum
- if (UseExtraChecksum)
+ if (UseCfgChecksum)
write(0); // cfg checksum
- writeGCOVString(SP.getName());
+ writeGCOVString(getFunctionName(SP));
writeGCOVString(SP.getFilename());
write(SP.getLineNumber());
}
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 (Function::iterator I = F->begin(), E = F->end(); I != E; ++I) {
+ GCOVBlock &Block = *Blocks[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 (Function::iterator I = F->begin(), E = F->end(); I != E; ++I) {
+ Blocks[I]->writeOut();
}
}
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.str());
+ return CurPath.str();
}
bool GCOVProfiler::runOnModule(Module &M) {
this->M = &M;
Ctx = &M.getContext();
- if (EmitNotes) emitProfileNotes();
- if (EmitData) return emitProfileArcs();
+ if (Options.EmitNotes) emitProfileNotes();
+ if (Options.EmitData) return emitProfileArcs();
return false;
}
DICompileUnit CU(CU_Nodes->getOperand(i));
std::string ErrorInfo;
raw_fd_ostream out(mangleName(CU, "gcno").c_str(), ErrorInfo,
- raw_fd_ostream::F_Binary);
+ sys::fs::F_Binary);
out.write("oncg", 4);
- out.write(Version, 4);
+ out.write(ReversedVersion, 4);
out.write("MVLL", 4);
DIArray SPs = CU.getSubprograms();
for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i) {
DISubprogram SP(SPs.getElement(i));
- if (!SP.Verify()) continue;
+ assert((!SP || SP.isSubprogram()) &&
+ "A MDNode in subprograms of a CU should be null or a DISubprogram.");
+ if (!SP)
+ continue;
Function *F = SP.getFunction();
if (!F) continue;
- GCOVFunction Func(SP, &out, i, UseExtraChecksum);
+ GCOVFunction Func(SP, &out, i, Options.UseCfgChecksum);
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
GCOVBlock &Block = Func.getBlock(BB);
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;
+ assert((!SP || SP.isSubprogram()) &&
+ "A MDNode in subprograms of a CU should be null or a DISubprogram.");
+ if (!SP)
+ continue;
Function *F = SP.getFunction();
if (!F) continue;
if (!Result) Result = true;
}
}
- 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);
+
+ // Inialize the environment and register the local writeout and flush
+ // functions.
+ Constant *GCOVInit = M->getOrInsertFunction("llvm_gcov_init", FTy);
+ Builder.CreateCall2(GCOVInit, WriteoutF, FlushF);
+ Builder.CreateRetVoid();
+
+ appendToGlobalCtors(*M, F, 0);
}
if (InsertIndCounterIncrCode)
return M->getOrInsertFunction("llvm_gcda_emit_arcs", 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);
std::string FilenameGcda = mangleName(CU, "gcda");
Builder.CreateCall2(StartFile,
Builder.CreateGlobalStringPtr(FilenameGcda),
- Builder.CreateGlobalStringPtr(Version));
+ Builder.CreateGlobalStringPtr(ReversedVersion));
for (unsigned j = 0, e = CountersBySP.size(); j != e; ++j) {
DISubprogram SP(CountersBySP[j].second);
- Builder.CreateCall3(EmitFunction,
- Builder.getInt32(j),
- NoFunctionNamesInData ?
- Constant::getNullValue(Builder.getInt8PtrTy()) :
- Builder.CreateGlobalStringPtr(SP.getName()),
- Builder.getInt8(UseExtraChecksum));
+ Builder.CreateCall3(
+ EmitFunction, Builder.getInt32(j),
+ Options.FunctionNamesInData ?
+ Builder.CreateGlobalStringPtr(getFunctionName(SP)) :
+ Constant::getNullValue(Builder.getInt8PtrTy()),
+ Builder.getInt8(Options.UseCfgChecksum));
GlobalVariable *GV = CountersBySP[j].first;
unsigned Arcs =
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.
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);
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;
}
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