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diff --git a/llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp b/llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp
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+//===- GCOVProfiling.cpp - Insert edge counters for gcov profiling --------===//
+//
+// 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 implements GCOV-style profiling. When this pass is run it emits
+// "gcno" files next to the existing source, and instruments the code that runs
+// to records the edges between blocks that run and emit a complementary "gcda"
+// file on exit.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/Hashing.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/Sequence.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/Analysis/EHPersonalities.h"
+#include "llvm/Analysis/TargetLibraryInfo.h"
+#include "llvm/IR/CFG.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/FileSystem.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/Regex.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Transforms/Instrumentation.h"
+#include "llvm/Transforms/Instrumentation/GCOVProfiler.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:
+ GCOVProfiler() : GCOVProfiler(GCOVOptions::getDefault()) {}
+ GCOVProfiler(const GCOVOptions &Opts) : 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';
+ }
+ bool
+ runOnModule(Module &M,
+ std::function<const TargetLibraryInfo &(Function &F)> GetTLI);
+
+private:
+ // 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.
+ bool emitProfileArcs();
+
+ bool isFunctionInstrumented(const Function &F);
+ std::vector<Regex> createRegexesFromString(StringRef RegexesStr);
+ static bool doesFilenameMatchARegex(StringRef Filename,
+ std::vector<Regex> &Regexes);
+
+ // Get pointers to the functions in the runtime library.
+ FunctionCallee getStartFileFunc(const TargetLibraryInfo *TLI);
+ FunctionCallee getEmitFunctionFunc(const TargetLibraryInfo *TLI);
+ FunctionCallee getEmitArcsFunc(const TargetLibraryInfo *TLI);
+ FunctionCallee getSummaryInfoFunc();
+ FunctionCallee getEndFileFunc();
+
+ // Add the function to write out all our counters to the global destructor
+ // list.
+ Function *
+ insertCounterWriteout(ArrayRef<std::pair<GlobalVariable *, MDNode *>>);
+ Function *insertFlush(ArrayRef<std::pair<GlobalVariable *, MDNode *>>);
+
+ void AddFlushBeforeForkAndExec();
+
+ enum class GCovFileType { GCNO, GCDA };
+ std::string mangleName(const DICompileUnit *CU, GCovFileType FileType);
+
+ GCOVOptions Options;
+
+ // Reversed, NUL-terminated copy of Options.Version.
+ char ReversedVersion[5];
+ // Checksum, produced by hash of EdgeDestinations
+ SmallVector<uint32_t, 4> FileChecksums;
+
+ Module *M;
+ std::function<const TargetLibraryInfo &(Function &F)> GetTLI;
+ LLVMContext *Ctx;
+ SmallVector<std::unique_ptr<GCOVFunction>, 16> Funcs;
+ std::vector<Regex> FilterRe;
+ std::vector<Regex> ExcludeRe;
+ StringMap<bool> InstrumentedFiles;
+};
+
+class GCOVProfilerLegacyPass : public ModulePass {
+public:
+ static char ID;
+ GCOVProfilerLegacyPass()
+ : GCOVProfilerLegacyPass(GCOVOptions::getDefault()) {}
+ GCOVProfilerLegacyPass(const GCOVOptions &Opts)
+ : ModulePass(ID), Profiler(Opts) {
+ initializeGCOVProfilerLegacyPassPass(*PassRegistry::getPassRegistry());
+ }
+ StringRef getPassName() const override { return "GCOV Profiler"; }
+
+ bool runOnModule(Module &M) override {
+ return Profiler.runOnModule(M, [this](Function &F) -> TargetLibraryInfo & {
+ return getAnalysis<TargetLibraryInfoWrapperPass>().getTLI(F);
+ });
+ }
+
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
+ AU.addRequired<TargetLibraryInfoWrapperPass>();
+ }
+
+private:
+ GCOVProfiler Profiler;
+};
+}
+
+char GCOVProfilerLegacyPass::ID = 0;
+INITIALIZE_PASS_BEGIN(
+ GCOVProfilerLegacyPass, "insert-gcov-profiling",
+ "Insert instrumentation for GCOV profiling", false, false)
+INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
+INITIALIZE_PASS_END(
+ GCOVProfilerLegacyPass, "insert-gcov-profiling",
+ "Insert instrumentation for GCOV profiling", false, false)
+
+ModulePass *llvm::createGCOVProfilerPass(const GCOVOptions &Options) {
+ return new GCOVProfilerLegacyPass(Options);
+}
+
+static StringRef getFunctionName(const DISubprogram *SP) {
+ if (!SP->getLinkageName().empty())
+ return SP->getLinkageName();
+ return SP->getName();
+}
+
+/// Extract a filename for a DISubprogram.
+///
+/// Prefer relative paths in the coverage notes. Clang also may split
+/// up absolute paths into a directory and filename component. When
+/// the relative path doesn't exist, reconstruct the absolute path.
+static SmallString<128> getFilename(const DISubprogram *SP) {
+ SmallString<128> Path;
+ StringRef RelPath = SP->getFilename();
+ if (sys::fs::exists(RelPath))
+ Path = RelPath;
+ else
+ sys::path::append(Path, SP->getDirectory(), SP->getFilename());
+ return Path;
+}
+
+namespace {
+ class GCOVRecord {
+ protected:
+ static const char *const LinesTag;
+ static const char *const FunctionTag;
+ static const char *const BlockTag;
+ static const char *const EdgeTag;
+
+ GCOVRecord() = default;
+
+ void writeBytes(const char *Bytes, int Size) {
+ os->write(Bytes, Size);
+ }
+
+ void write(uint32_t i) {
+ writeBytes(reinterpret_cast<char*>(&i), 4);
+ }
+
+ // Returns the length measured in 4-byte blocks that will be used to
+ // represent this string in a GCOV file
+ 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.
+ return (s.size() / 4) + 1;
+ }
+
+ void writeGCOVString(StringRef s) {
+ uint32_t Len = lengthOfGCOVString(s);
+ write(Len);
+ writeBytes(s.data(), s.size());
+
+ // Write 1 to 4 bytes of NUL padding.
+ assert((unsigned)(4 - (s.size() % 4)) > 0);
+ assert((unsigned)(4 - (s.size() % 4)) <= 4);
+ writeBytes("\0\0\0\0", 4 - (s.size() % 4));
+ }
+
+ raw_ostream *os;
+ };
+ 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;
+
+ // Constructed only by requesting it from a GCOVBlock, this object stores a
+ // list of line numbers and a single filename, representing lines that belong
+ // to the block.
+ 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() const {
+ // Here 2 = 1 for string length + 1 for '0' id#.
+ return lengthOfGCOVString(Filename) + 2 + Lines.size();
+ }
+
+ void writeOut() {
+ write(0);
+ writeGCOVString(Filename);
+ for (int i = 0, e = Lines.size(); i != e; ++i)
+ write(Lines[i]);
+ }
+
+ GCOVLines(StringRef F, raw_ostream *os)
+ : Filename(F) {
+ this->os = os;
+ }
+
+ private:
+ std::string Filename;
+ 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.
+ class GCOVBlock : public GCOVRecord {
+ public:
+ GCOVLines &getFile(StringRef Filename) {
+ return LinesByFile.try_emplace(Filename, Filename, os).first->second;
+ }
+
+ void addEdge(GCOVBlock &Successor) {
+ OutEdges.push_back(&Successor);
+ }
+
+ void writeOut() {
+ uint32_t Len = 3;
+ SmallVector<StringMapEntry<GCOVLines> *, 32> SortedLinesByFile;
+ for (auto &I : LinesByFile) {
+ Len += I.second.length();
+ SortedLinesByFile.push_back(&I);
+ }
+
+ writeBytes(LinesTag, 4);
+ write(Len);
+ write(Number);
+
+ llvm::sort(SortedLinesByFile, [](StringMapEntry<GCOVLines> *LHS,
+ StringMapEntry<GCOVLines> *RHS) {
+ return LHS->getKey() < RHS->getKey();
+ });
+ for (auto &I : SortedLinesByFile)
+ I->getValue().writeOut();
+ write(0);
+ write(0);
+ }
+
+ 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;
+
+ GCOVBlock(uint32_t Number, raw_ostream *os)
+ : Number(Number) {
+ this->os = os;
+ }
+
+ uint32_t Number;
+ StringMap<GCOVLines> LinesByFile;
+ SmallVector<GCOVBlock *, 4> OutEdges;
+ };
+
+ // A function has a unique identifier, a checksum (we leave as zero) and a
+ // set of blocks and a map of edges between blocks. This is the only GCOV
+ // object users can construct, the blocks and lines will be rooted here.
+ class GCOVFunction : public GCOVRecord {
+ public:
+ 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;
+
+ LLVM_DEBUG(dbgs() << "Function: " << getFunctionName(SP) << "\n");
+
+ uint32_t i = 0;
+ 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)));
+ }
+ if (!ExitBlockBeforeBody)
+ ReturnBlock.Number = i;
+
+ std::string FunctionNameAndLine;
+ raw_string_ostream FNLOS(FunctionNameAndLine);
+ FNLOS << getFunctionName(SP) << SP->getLine();
+ FNLOS.flush();
+ FuncChecksum = hash_value(FunctionNameAndLine);
+ }
+
+ GCOVBlock &getBlock(BasicBlock *BB) {
+ return Blocks.find(BB)->second;
+ }
+
+ GCOVBlock &getReturnBlock() {
+ return ReturnBlock;
+ }
+
+ 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;
+ }
+
+ uint32_t getFuncChecksum() {
+ return FuncChecksum;
+ }
+
+ void setCfgChecksum(uint32_t Checksum) {
+ CfgChecksum = Checksum;
+ }
+
+ void writeOut() {
+ writeBytes(FunctionTag, 4);
+ SmallString<128> Filename = getFilename(SP);
+ uint32_t BlockLen = 1 + 1 + 1 + lengthOfGCOVString(getFunctionName(SP)) +
+ 1 + lengthOfGCOVString(Filename) + 1;
+ if (UseCfgChecksum)
+ ++BlockLen;
+ write(BlockLen);
+ write(Ident);
+ write(FuncChecksum);
+ if (UseCfgChecksum)
+ write(CfgChecksum);
+ writeGCOVString(getFunctionName(SP));
+ writeGCOVString(Filename);
+ write(SP->getLine());
+
+ // Emit count of blocks.
+ writeBytes(BlockTag, 4);
+ write(Blocks.size() + 1);
+ for (int i = 0, e = Blocks.size() + 1; i != e; ++i) {
+ write(0); // No flags on our blocks.
+ }
+ LLVM_DEBUG(dbgs() << Blocks.size() << " blocks.\n");
+
+ // Emit edges between blocks.
+ 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);
+ write(Block.OutEdges.size() * 2 + 1);
+ write(Block.Number);
+ for (int i = 0, e = Block.OutEdges.size(); i != e; ++i) {
+ LLVM_DEBUG(dbgs() << Block.Number << " -> "
+ << Block.OutEdges[i]->Number << "\n");
+ write(Block.OutEdges[i]->Number);
+ write(0); // no flags
+ }
+ }
+
+ // Emit lines for each block.
+ for (BasicBlock &I : *F)
+ getBlock(&I).writeOut();
+ }
+
+ private:
+ const DISubprogram *SP;
+ uint32_t Ident;
+ uint32_t FuncChecksum;
+ bool UseCfgChecksum;
+ uint32_t CfgChecksum;
+ DenseMap<BasicBlock *, GCOVBlock> Blocks;
+ GCOVBlock ReturnBlock;
+ };
+}
+
+// RegexesStr is a string containing differents regex separated by a semi-colon.
+// For example "foo\..*$;bar\..*$".
+std::vector<Regex> GCOVProfiler::createRegexesFromString(StringRef RegexesStr) {
+ std::vector<Regex> Regexes;
+ while (!RegexesStr.empty()) {
+ std::pair<StringRef, StringRef> HeadTail = RegexesStr.split(';');
+ if (!HeadTail.first.empty()) {
+ Regex Re(HeadTail.first);
+ std::string Err;
+ if (!Re.isValid(Err)) {
+ Ctx->emitError(Twine("Regex ") + HeadTail.first +
+ " is not valid: " + Err);
+ }
+ Regexes.emplace_back(std::move(Re));
+ }
+ RegexesStr = HeadTail.second;
+ }
+ return Regexes;
+}
+
+bool GCOVProfiler::doesFilenameMatchARegex(StringRef Filename,
+ std::vector<Regex> &Regexes) {
+ for (Regex &Re : Regexes) {
+ if (Re.match(Filename)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+bool GCOVProfiler::isFunctionInstrumented(const Function &F) {
+ if (FilterRe.empty() && ExcludeRe.empty()) {
+ return true;
+ }
+ SmallString<128> Filename = getFilename(F.getSubprogram());
+ auto It = InstrumentedFiles.find(Filename);
+ if (It != InstrumentedFiles.end()) {
+ return It->second;
+ }
+
+ SmallString<256> RealPath;
+ StringRef RealFilename;
+
+ // Path can be
+ // /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/*.h so for
+ // such a case we must get the real_path.
+ if (sys::fs::real_path(Filename, RealPath)) {
+ // real_path can fail with path like "foo.c".
+ RealFilename = Filename;
+ } else {
+ RealFilename = RealPath;
+ }
+
+ bool ShouldInstrument;
+ if (FilterRe.empty()) {
+ ShouldInstrument = !doesFilenameMatchARegex(RealFilename, ExcludeRe);
+ } else if (ExcludeRe.empty()) {
+ ShouldInstrument = doesFilenameMatchARegex(RealFilename, FilterRe);
+ } else {
+ ShouldInstrument = doesFilenameMatchARegex(RealFilename, FilterRe) &&
+ !doesFilenameMatchARegex(RealFilename, ExcludeRe);
+ }
+ InstrumentedFiles[Filename] = ShouldInstrument;
+ return ShouldInstrument;
+}
+
+std::string GCOVProfiler::mangleName(const DICompileUnit *CU,
+ GCovFileType OutputType) {
+ bool Notes = OutputType == GCovFileType::GCNO;
+
+ if (NamedMDNode *GCov = M->getNamedMetadata("llvm.gcov")) {
+ for (int i = 0, e = GCov->getNumOperands(); i != e; ++i) {
+ MDNode *N = GCov->getOperand(i);
+ bool ThreeElement = N->getNumOperands() == 3;
+ if (!ThreeElement && N->getNumOperands() != 2)
+ continue;
+ if (dyn_cast<MDNode>(N->getOperand(ThreeElement ? 2 : 1)) != CU)
+ continue;
+
+ if (ThreeElement) {
+ // These nodes have no mangling to apply, it's stored mangled in the
+ // bitcode.
+ MDString *NotesFile = dyn_cast<MDString>(N->getOperand(0));
+ MDString *DataFile = dyn_cast<MDString>(N->getOperand(1));
+ if (!NotesFile || !DataFile)
+ continue;
+ return Notes ? NotesFile->getString() : DataFile->getString();
+ }
+
+ MDString *GCovFile = dyn_cast<MDString>(N->getOperand(0));
+ if (!GCovFile)
+ continue;
+
+ SmallString<128> Filename = GCovFile->getString();
+ sys::path::replace_extension(Filename, Notes ? "gcno" : "gcda");
+ return Filename.str();
+ }
+ }
+
+ SmallString<128> Filename = CU->getFilename();
+ sys::path::replace_extension(Filename, Notes ? "gcno" : "gcda");
+ 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, std::function<const TargetLibraryInfo &(Function &F)> GetTLI) {
+ this->M = &M;
+ this->GetTLI = std::move(GetTLI);
+ Ctx = &M.getContext();
+
+ AddFlushBeforeForkAndExec();
+
+ FilterRe = createRegexesFromString(Options.Filter);
+ ExcludeRe = createRegexesFromString(Options.Exclude);
+
+ if (Options.EmitNotes) emitProfileNotes();
+ if (Options.EmitData) return emitProfileArcs();
+ return false;
+}
+
+PreservedAnalyses GCOVProfilerPass::run(Module &M,
+ ModuleAnalysisManager &AM) {
+
+ GCOVProfiler Profiler(GCOVOpts);
+ FunctionAnalysisManager &FAM =
+ AM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
+
+ if (!Profiler.runOnModule(M, [&](Function &F) -> TargetLibraryInfo & {
+ return FAM.getResult<TargetLibraryAnalysis>(F);
+ }))
+ return PreservedAnalyses::all();
+
+ return PreservedAnalyses::none();
+}
+
+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 (auto &BB : F) {
+ for (auto &I : BB) {
+ // 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;
+}
+
+static bool isUsingScopeBasedEH(Function &F) {
+ if (!F.hasPersonalityFn()) return false;
+
+ EHPersonality Personality = classifyEHPersonality(F.getPersonalityFn());
+ return isScopedEHPersonality(Personality);
+}
+
+static bool shouldKeepInEntry(BasicBlock::iterator It) {
+ if (isa<AllocaInst>(*It)) return true;
+ if (isa<DbgInfoIntrinsic>(*It)) return true;
+ if (auto *II = dyn_cast<IntrinsicInst>(It)) {
+ if (II->getIntrinsicID() == llvm::Intrinsic::localescape) return true;
+ }
+
+ return false;
+}
+
+void GCOVProfiler::AddFlushBeforeForkAndExec() {
+ SmallVector<Instruction *, 2> ForkAndExecs;
+ for (auto &F : M->functions()) {
+ auto *TLI = &GetTLI(F);
+ for (auto &I : instructions(F)) {
+ if (CallInst *CI = dyn_cast<CallInst>(&I)) {
+ if (Function *Callee = CI->getCalledFunction()) {
+ LibFunc LF;
+ if (TLI->getLibFunc(*Callee, LF) &&
+ (LF == LibFunc_fork || LF == LibFunc_execl ||
+ LF == LibFunc_execle || LF == LibFunc_execlp ||
+ LF == LibFunc_execv || LF == LibFunc_execvp ||
+ LF == LibFunc_execve || LF == LibFunc_execvpe ||
+ LF == LibFunc_execvP)) {
+ ForkAndExecs.push_back(&I);
+ }
+ }
+ }
+ }
+ }
+
+ // We need to split the block after the fork/exec call
+ // because else the counters for the lines after will be
+ // the same as before the call.
+ for (auto I : ForkAndExecs) {
+ IRBuilder<> Builder(I);
+ FunctionType *FTy = FunctionType::get(Builder.getVoidTy(), {}, false);
+ FunctionCallee GCOVFlush = M->getOrInsertFunction("__gcov_flush", FTy);
+ Builder.CreateCall(GCOVFlush);
+ I->getParent()->splitBasicBlock(I);
+ }
+}
+
+void GCOVProfiler::emitProfileNotes() {
+ NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
+ if (!CU_Nodes) return;
+
+ for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
+ // Each compile unit gets its own .gcno file. This means that whether we run
+ // this pass over the original .o's as they're produced, or run it after
+ // LTO, we'll generate the same .gcno files.
+
+ auto *CU = cast<DICompileUnit>(CU_Nodes->getOperand(i));
+
+ // Skip module skeleton (and module) CUs.
+ if (CU->getDWOId())
+ continue;
+
+ std::error_code EC;
+ raw_fd_ostream out(mangleName(CU, GCovFileType::GCNO), EC,
+ sys::fs::OF_None);
+ if (EC) {
+ Ctx->emitError(Twine("failed to open coverage notes file for writing: ") +
+ EC.message());
+ continue;
+ }
+
+ std::string EdgeDestinations;
+
+ unsigned FunctionIdent = 0;
+ for (auto &F : M->functions()) {
+ DISubprogram *SP = F.getSubprogram();
+ if (!SP) continue;
+ if (!functionHasLines(F) || !isFunctionInstrumented(F))
+ continue;
+ // TODO: Functions using scope-based EH are currently not supported.
+ if (isUsingScopeBasedEH(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 (shouldKeepInEntry(It))
+ ++It;
+ EntryBlock.splitBasicBlock(It);
+
+ Funcs.push_back(std::make_unique<GCOVFunction>(SP, &F, &out, FunctionIdent++,
+ Options.UseCfgChecksum,
+ Options.ExitBlockBeforeBody));
+ GCOVFunction &Func = *Funcs.back();
+
+ // Add the function line number to the lines of the entry block
+ // to have a counter for the function definition.
+ uint32_t Line = SP->getLine();
+ auto Filename = getFilename(SP);
+ Func.getBlock(&EntryBlock).getFile(Filename).addLine(Line);
+
+ for (auto &BB : F) {
+ GCOVBlock &Block = Func.getBlock(&BB);
+ Instruction *TI = BB.getTerminator();
+ if (int successors = TI->getNumSuccessors()) {
+ for (int i = 0; i != successors; ++i) {
+ Block.addEdge(Func.getBlock(TI->getSuccessor(i)));
+ }
+ } else if (isa<ReturnInst>(TI)) {
+ Block.addEdge(Func.getReturnBlock());
+ }
+
+ for (auto &I : BB) {
+ // 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 || Loc.isImplicitCode())
+ continue;
+
+ if (Line == Loc.getLine()) continue;
+ Line = Loc.getLine();
+ if (SP != getDISubprogram(Loc.getScope()))
+ continue;
+
+ GCOVLines &Lines = Block.getFile(Filename);
+ Lines.addLine(Loc.getLine());
+ }
+ Line = 0;
+ }
+ 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();
+ }
+}
+
+bool GCOVProfiler::emitProfileArcs() {
+ NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
+ if (!CU_Nodes) return false;
+
+ bool Result = false;
+ for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
+ SmallVector<std::pair<GlobalVariable *, MDNode *>, 8> CountersBySP;
+ for (auto &F : M->functions()) {
+ DISubprogram *SP = F.getSubprogram();
+ if (!SP) continue;
+ if (!functionHasLines(F) || !isFunctionInstrumented(F))
+ continue;
+ // TODO: Functions using scope-based EH are currently not supported.
+ if (isUsingScopeBasedEH(F)) continue;
+ if (!Result) Result = true;
+
+ DenseMap<std::pair<BasicBlock *, BasicBlock *>, unsigned> EdgeToCounter;
+ unsigned Edges = 0;
+ for (auto &BB : F) {
+ Instruction *TI = BB.getTerminator();
+ if (isa<ReturnInst>(TI)) {
+ EdgeToCounter[{&BB, nullptr}] = Edges++;
+ } else {
+ for (BasicBlock *Succ : successors(TI)) {
+ EdgeToCounter[{&BB, Succ}] = Edges++;
+ }
+ }
+ }
+
+ ArrayType *CounterTy =
+ ArrayType::get(Type::getInt64Ty(*Ctx), Edges);
+ GlobalVariable *Counters =
+ new GlobalVariable(*M, CounterTy, false,
+ GlobalValue::InternalLinkage,
+ Constant::getNullValue(CounterTy),
+ "__llvm_gcov_ctr");
+ CountersBySP.push_back(std::make_pair(Counters, SP));
+
+ // If a BB has several predecessors, use a PHINode to select
+ // the correct counter.
+ for (auto &BB : F) {
+ const unsigned EdgeCount =
+ std::distance(pred_begin(&BB), pred_end(&BB));
+ if (EdgeCount) {
+ // The phi node must be at the begin of the BB.
+ IRBuilder<> BuilderForPhi(&*BB.begin());
+ Type *Int64PtrTy = Type::getInt64PtrTy(*Ctx);
+ PHINode *Phi = BuilderForPhi.CreatePHI(Int64PtrTy, EdgeCount);
+ for (BasicBlock *Pred : predecessors(&BB)) {
+ auto It = EdgeToCounter.find({Pred, &BB});
+ assert(It != EdgeToCounter.end());
+ const unsigned Edge = It->second;
+ Value *EdgeCounter = BuilderForPhi.CreateConstInBoundsGEP2_64(
+ Counters->getValueType(), Counters, 0, Edge);
+ Phi->addIncoming(EdgeCounter, Pred);
+ }
+
+ // Skip phis, landingpads.
+ IRBuilder<> Builder(&*BB.getFirstInsertionPt());
+ Value *Count = Builder.CreateLoad(Builder.getInt64Ty(), Phi);
+ Count = Builder.CreateAdd(Count, Builder.getInt64(1));
+ Builder.CreateStore(Count, Phi);
+
+ Instruction *TI = BB.getTerminator();
+ if (isa<ReturnInst>(TI)) {
+ auto It = EdgeToCounter.find({&BB, nullptr});
+ assert(It != EdgeToCounter.end());
+ const unsigned Edge = It->second;
+ Value *Counter = Builder.CreateConstInBoundsGEP2_64(
+ Counters->getValueType(), Counters, 0, Edge);
+ Value *Count = Builder.CreateLoad(Builder.getInt64Ty(), Counter);
+ Count = Builder.CreateAdd(Count, Builder.getInt64(1));
+ Builder.CreateStore(Count, Counter);
+ }
+ }
+ }
+ }
+
+ 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(GlobalValue::UnnamedAddr::Global);
+ 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.
+ FunctionCallee GCOVInit = M->getOrInsertFunction("llvm_gcov_init", FTy);
+ Builder.CreateCall(GCOVInit, {WriteoutF, FlushF});
+ Builder.CreateRetVoid();
+
+ appendToGlobalCtors(*M, F, 0);
+ }
+
+ return Result;
+}
+
+FunctionCallee GCOVProfiler::getStartFileFunc(const TargetLibraryInfo *TLI) {
+ 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);
+ AttributeList AL;
+ if (auto AK = TLI->getExtAttrForI32Param(false))
+ AL = AL.addParamAttribute(*Ctx, 2, AK);
+ FunctionCallee Res = M->getOrInsertFunction("llvm_gcda_start_file", FTy, AL);
+ return Res;
+}
+
+FunctionCallee GCOVProfiler::getEmitFunctionFunc(const TargetLibraryInfo *TLI) {
+ 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);
+ AttributeList AL;
+ if (auto AK = TLI->getExtAttrForI32Param(false)) {
+ AL = AL.addParamAttribute(*Ctx, 0, AK);
+ AL = AL.addParamAttribute(*Ctx, 2, AK);
+ AL = AL.addParamAttribute(*Ctx, 3, AK);
+ AL = AL.addParamAttribute(*Ctx, 4, AK);
+ }
+ return M->getOrInsertFunction("llvm_gcda_emit_function", FTy);
+}
+
+FunctionCallee GCOVProfiler::getEmitArcsFunc(const TargetLibraryInfo *TLI) {
+ Type *Args[] = {
+ Type::getInt32Ty(*Ctx), // uint32_t num_counters
+ Type::getInt64PtrTy(*Ctx), // uint64_t *counters
+ };
+ FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false);
+ AttributeList AL;
+ if (auto AK = TLI->getExtAttrForI32Param(false))
+ AL = AL.addParamAttribute(*Ctx, 0, AK);
+ return M->getOrInsertFunction("llvm_gcda_emit_arcs", FTy, AL);
+}
+
+FunctionCallee GCOVProfiler::getSummaryInfoFunc() {
+ FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+ return M->getOrInsertFunction("llvm_gcda_summary_info", FTy);
+}
+
+FunctionCallee GCOVProfiler::getEndFileFunc() {
+ FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+ return M->getOrInsertFunction("llvm_gcda_end_file", FTy);
+}
+
+Function *GCOVProfiler::insertCounterWriteout(
+ ArrayRef<std::pair<GlobalVariable *, MDNode *> > CountersBySP) {
+ FunctionType *WriteoutFTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+ Function *WriteoutF = M->getFunction("__llvm_gcov_writeout");
+ if (!WriteoutF)
+ WriteoutF = Function::Create(WriteoutFTy, GlobalValue::InternalLinkage,
+ "__llvm_gcov_writeout", M);
+ WriteoutF->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
+ WriteoutF->addFnAttr(Attribute::NoInline);
+ if (Options.NoRedZone)
+ WriteoutF->addFnAttr(Attribute::NoRedZone);
+
+ BasicBlock *BB = BasicBlock::Create(*Ctx, "entry", WriteoutF);
+ IRBuilder<> Builder(BB);
+
+ auto *TLI = &GetTLI(*WriteoutF);
+
+ FunctionCallee StartFile = getStartFileFunc(TLI);
+ FunctionCallee EmitFunction = getEmitFunctionFunc(TLI);
+ FunctionCallee EmitArcs = getEmitArcsFunc(TLI);
+ FunctionCallee SummaryInfo = getSummaryInfoFunc();
+ FunctionCallee EndFile = getEndFileFunc();
+
+ NamedMDNode *CUNodes = M->getNamedMetadata("llvm.dbg.cu");
+ if (!CUNodes) {
+ Builder.CreateRetVoid();
+ return WriteoutF;
+ }
+
+ // Collect the relevant data into a large constant data structure that we can
+ // walk to write out everything.
+ StructType *StartFileCallArgsTy = StructType::create(
+ {Builder.getInt8PtrTy(), Builder.getInt8PtrTy(), Builder.getInt32Ty()});
+ StructType *EmitFunctionCallArgsTy = StructType::create(
+ {Builder.getInt32Ty(), Builder.getInt8PtrTy(), Builder.getInt32Ty(),
+ Builder.getInt8Ty(), Builder.getInt32Ty()});
+ StructType *EmitArcsCallArgsTy = StructType::create(
+ {Builder.getInt32Ty(), Builder.getInt64Ty()->getPointerTo()});
+ StructType *FileInfoTy =
+ StructType::create({StartFileCallArgsTy, Builder.getInt32Ty(),
+ EmitFunctionCallArgsTy->getPointerTo(),
+ EmitArcsCallArgsTy->getPointerTo()});
+
+ Constant *Zero32 = Builder.getInt32(0);
+ // Build an explicit array of two zeros for use in ConstantExpr GEP building.
+ Constant *TwoZero32s[] = {Zero32, Zero32};
+
+ SmallVector<Constant *, 8> FileInfos;
+ for (int i : llvm::seq<int>(0, CUNodes->getNumOperands())) {
+ auto *CU = cast<DICompileUnit>(CUNodes->getOperand(i));
+
+ // Skip module skeleton (and module) CUs.
+ if (CU->getDWOId())
+ continue;
+
+ std::string FilenameGcda = mangleName(CU, GCovFileType::GCDA);
+ uint32_t CfgChecksum = FileChecksums.empty() ? 0 : FileChecksums[i];
+ auto *StartFileCallArgs = ConstantStruct::get(
+ StartFileCallArgsTy, {Builder.CreateGlobalStringPtr(FilenameGcda),
+ Builder.CreateGlobalStringPtr(ReversedVersion),
+ Builder.getInt32(CfgChecksum)});
+
+ SmallVector<Constant *, 8> EmitFunctionCallArgsArray;
+ SmallVector<Constant *, 8> EmitArcsCallArgsArray;
+ for (int j : llvm::seq<int>(0, CountersBySP.size())) {
+ auto *SP = cast_or_null<DISubprogram>(CountersBySP[j].second);
+ uint32_t FuncChecksum = Funcs.empty() ? 0 : Funcs[j]->getFuncChecksum();
+ EmitFunctionCallArgsArray.push_back(ConstantStruct::get(
+ EmitFunctionCallArgsTy,
+ {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->getValueType())->getNumElements();
+ EmitArcsCallArgsArray.push_back(ConstantStruct::get(
+ EmitArcsCallArgsTy,
+ {Builder.getInt32(Arcs), ConstantExpr::getInBoundsGetElementPtr(
+ GV->getValueType(), GV, TwoZero32s)}));
+ }
+ // Create global arrays for the two emit calls.
+ int CountersSize = CountersBySP.size();
+ assert(CountersSize == (int)EmitFunctionCallArgsArray.size() &&
+ "Mismatched array size!");
+ assert(CountersSize == (int)EmitArcsCallArgsArray.size() &&
+ "Mismatched array size!");
+ auto *EmitFunctionCallArgsArrayTy =
+ ArrayType::get(EmitFunctionCallArgsTy, CountersSize);
+ auto *EmitFunctionCallArgsArrayGV = new GlobalVariable(
+ *M, EmitFunctionCallArgsArrayTy, /*isConstant*/ true,
+ GlobalValue::InternalLinkage,
+ ConstantArray::get(EmitFunctionCallArgsArrayTy,
+ EmitFunctionCallArgsArray),
+ Twine("__llvm_internal_gcov_emit_function_args.") + Twine(i));
+ auto *EmitArcsCallArgsArrayTy =
+ ArrayType::get(EmitArcsCallArgsTy, CountersSize);
+ EmitFunctionCallArgsArrayGV->setUnnamedAddr(
+ GlobalValue::UnnamedAddr::Global);
+ auto *EmitArcsCallArgsArrayGV = new GlobalVariable(
+ *M, EmitArcsCallArgsArrayTy, /*isConstant*/ true,
+ GlobalValue::InternalLinkage,
+ ConstantArray::get(EmitArcsCallArgsArrayTy, EmitArcsCallArgsArray),
+ Twine("__llvm_internal_gcov_emit_arcs_args.") + Twine(i));
+ EmitArcsCallArgsArrayGV->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
+
+ FileInfos.push_back(ConstantStruct::get(
+ FileInfoTy,
+ {StartFileCallArgs, Builder.getInt32(CountersSize),
+ ConstantExpr::getInBoundsGetElementPtr(EmitFunctionCallArgsArrayTy,
+ EmitFunctionCallArgsArrayGV,
+ TwoZero32s),
+ ConstantExpr::getInBoundsGetElementPtr(
+ EmitArcsCallArgsArrayTy, EmitArcsCallArgsArrayGV, TwoZero32s)}));
+ }
+
+ // If we didn't find anything to actually emit, bail on out.
+ if (FileInfos.empty()) {
+ Builder.CreateRetVoid();
+ return WriteoutF;
+ }
+
+ // To simplify code, we cap the number of file infos we write out to fit
+ // easily in a 32-bit signed integer. This gives consistent behavior between
+ // 32-bit and 64-bit systems without requiring (potentially very slow) 64-bit
+ // operations on 32-bit systems. It also seems unreasonable to try to handle
+ // more than 2 billion files.
+ if ((int64_t)FileInfos.size() > (int64_t)INT_MAX)
+ FileInfos.resize(INT_MAX);
+
+ // Create a global for the entire data structure so we can walk it more
+ // easily.
+ auto *FileInfoArrayTy = ArrayType::get(FileInfoTy, FileInfos.size());
+ auto *FileInfoArrayGV = new GlobalVariable(
+ *M, FileInfoArrayTy, /*isConstant*/ true, GlobalValue::InternalLinkage,
+ ConstantArray::get(FileInfoArrayTy, FileInfos),
+ "__llvm_internal_gcov_emit_file_info");
+ FileInfoArrayGV->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
+
+ // Create the CFG for walking this data structure.
+ auto *FileLoopHeader =
+ BasicBlock::Create(*Ctx, "file.loop.header", WriteoutF);
+ auto *CounterLoopHeader =
+ BasicBlock::Create(*Ctx, "counter.loop.header", WriteoutF);
+ auto *FileLoopLatch = BasicBlock::Create(*Ctx, "file.loop.latch", WriteoutF);
+ auto *ExitBB = BasicBlock::Create(*Ctx, "exit", WriteoutF);
+
+ // We always have at least one file, so just branch to the header.
+ Builder.CreateBr(FileLoopHeader);
+
+ // The index into the files structure is our loop induction variable.
+ Builder.SetInsertPoint(FileLoopHeader);
+ PHINode *IV =
+ Builder.CreatePHI(Builder.getInt32Ty(), /*NumReservedValues*/ 2);
+ IV->addIncoming(Builder.getInt32(0), BB);
+ auto *FileInfoPtr = Builder.CreateInBoundsGEP(
+ FileInfoArrayTy, FileInfoArrayGV, {Builder.getInt32(0), IV});
+ auto *StartFileCallArgsPtr =
+ Builder.CreateStructGEP(FileInfoTy, FileInfoPtr, 0);
+ auto *StartFileCall = Builder.CreateCall(
+ StartFile,
+ {Builder.CreateLoad(StartFileCallArgsTy->getElementType(0),
+ Builder.CreateStructGEP(StartFileCallArgsTy,
+ StartFileCallArgsPtr, 0)),
+ Builder.CreateLoad(StartFileCallArgsTy->getElementType(1),
+ Builder.CreateStructGEP(StartFileCallArgsTy,
+ StartFileCallArgsPtr, 1)),
+ Builder.CreateLoad(StartFileCallArgsTy->getElementType(2),
+ Builder.CreateStructGEP(StartFileCallArgsTy,
+ StartFileCallArgsPtr, 2))});
+ if (auto AK = TLI->getExtAttrForI32Param(false))
+ StartFileCall->addParamAttr(2, AK);
+ auto *NumCounters =
+ Builder.CreateLoad(FileInfoTy->getElementType(1),
+ Builder.CreateStructGEP(FileInfoTy, FileInfoPtr, 1));
+ auto *EmitFunctionCallArgsArray =
+ Builder.CreateLoad(FileInfoTy->getElementType(2),
+ Builder.CreateStructGEP(FileInfoTy, FileInfoPtr, 2));
+ auto *EmitArcsCallArgsArray =
+ Builder.CreateLoad(FileInfoTy->getElementType(3),
+ Builder.CreateStructGEP(FileInfoTy, FileInfoPtr, 3));
+ auto *EnterCounterLoopCond =
+ Builder.CreateICmpSLT(Builder.getInt32(0), NumCounters);
+ Builder.CreateCondBr(EnterCounterLoopCond, CounterLoopHeader, FileLoopLatch);
+
+ Builder.SetInsertPoint(CounterLoopHeader);
+ auto *JV = Builder.CreatePHI(Builder.getInt32Ty(), /*NumReservedValues*/ 2);
+ JV->addIncoming(Builder.getInt32(0), FileLoopHeader);
+ auto *EmitFunctionCallArgsPtr = Builder.CreateInBoundsGEP(
+ EmitFunctionCallArgsTy, EmitFunctionCallArgsArray, JV);
+ auto *EmitFunctionCall = Builder.CreateCall(
+ EmitFunction,
+ {Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(0),
+ Builder.CreateStructGEP(EmitFunctionCallArgsTy,
+ EmitFunctionCallArgsPtr, 0)),
+ Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(1),
+ Builder.CreateStructGEP(EmitFunctionCallArgsTy,
+ EmitFunctionCallArgsPtr, 1)),
+ Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(2),
+ Builder.CreateStructGEP(EmitFunctionCallArgsTy,
+ EmitFunctionCallArgsPtr, 2)),
+ Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(3),
+ Builder.CreateStructGEP(EmitFunctionCallArgsTy,
+ EmitFunctionCallArgsPtr, 3)),
+ Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(4),
+ Builder.CreateStructGEP(EmitFunctionCallArgsTy,
+ EmitFunctionCallArgsPtr,
+ 4))});
+ if (auto AK = TLI->getExtAttrForI32Param(false)) {
+ EmitFunctionCall->addParamAttr(0, AK);
+ EmitFunctionCall->addParamAttr(2, AK);
+ EmitFunctionCall->addParamAttr(3, AK);
+ EmitFunctionCall->addParamAttr(4, AK);
+ }
+ auto *EmitArcsCallArgsPtr =
+ Builder.CreateInBoundsGEP(EmitArcsCallArgsTy, EmitArcsCallArgsArray, JV);
+ auto *EmitArcsCall = Builder.CreateCall(
+ EmitArcs,
+ {Builder.CreateLoad(
+ EmitArcsCallArgsTy->getElementType(0),
+ Builder.CreateStructGEP(EmitArcsCallArgsTy, EmitArcsCallArgsPtr, 0)),
+ Builder.CreateLoad(EmitArcsCallArgsTy->getElementType(1),
+ Builder.CreateStructGEP(EmitArcsCallArgsTy,
+ EmitArcsCallArgsPtr, 1))});
+ if (auto AK = TLI->getExtAttrForI32Param(false))
+ EmitArcsCall->addParamAttr(0, AK);
+ auto *NextJV = Builder.CreateAdd(JV, Builder.getInt32(1));
+ auto *CounterLoopCond = Builder.CreateICmpSLT(NextJV, NumCounters);
+ Builder.CreateCondBr(CounterLoopCond, CounterLoopHeader, FileLoopLatch);
+ JV->addIncoming(NextJV, CounterLoopHeader);
+
+ Builder.SetInsertPoint(FileLoopLatch);
+ Builder.CreateCall(SummaryInfo, {});
+ Builder.CreateCall(EndFile, {});
+ auto *NextIV = Builder.CreateAdd(IV, Builder.getInt32(1));
+ auto *FileLoopCond =
+ Builder.CreateICmpSLT(NextIV, Builder.getInt32(FileInfos.size()));
+ Builder.CreateCondBr(FileLoopCond, FileLoopHeader, ExitBB);
+ IV->addIncoming(NextIV, FileLoopLatch);
+
+ Builder.SetInsertPoint(ExitBB);
+ Builder.CreateRetVoid();
+
+ return WriteoutF;
+}
+
+Function *GCOVProfiler::
+insertFlush(ArrayRef<std::pair<GlobalVariable*, MDNode*> > CountersBySP) {
+ FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+ Function *FlushF = M->getFunction("__llvm_gcov_flush");
+ if (!FlushF)
+ FlushF = Function::Create(FTy, GlobalValue::InternalLinkage,
+ "__llvm_gcov_flush", M);
+ else
+ FlushF->setLinkage(GlobalValue::InternalLinkage);
+ FlushF->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
+ FlushF->addFnAttr(Attribute::NoInline);
+ if (Options.NoRedZone)
+ FlushF->addFnAttr(Attribute::NoRedZone);
+
+ BasicBlock *Entry = BasicBlock::Create(*Ctx, "entry", FlushF);
+
+ // Write out the current counters.
+ Function *WriteoutF = M->getFunction("__llvm_gcov_writeout");
+ assert(WriteoutF && "Need to create the writeout function first!");
+
+ IRBuilder<> Builder(Entry);
+ Builder.CreateCall(WriteoutF, {});
+
+ // Zero out the counters.
+ for (const auto &I : CountersBySP) {
+ GlobalVariable *GV = I.first;
+ Constant *Null = Constant::getNullValue(GV->getValueType());
+ Builder.CreateStore(Null, GV);
+ }
+
+ Type *RetTy = FlushF->getReturnType();
+ if (RetTy == Type::getVoidTy(*Ctx))
+ Builder.CreateRetVoid();
+ else if (RetTy->isIntegerTy())
+ // Used if __llvm_gcov_flush was implicitly declared.
+ Builder.CreateRet(ConstantInt::get(RetTy, 0));
+ else
+ report_fatal_error("invalid return type for __llvm_gcov_flush");
+
+ return FlushF;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-03 20:41:52 +0000