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llvm-cov: Added support for function checksums.
The function checksums are hashed from the concatenation of the function name and line number. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196358 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -250,6 +250,7 @@ public:
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private:
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GCOVFile &Parent;
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uint32_t Ident;
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uint32_t Checksum;
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uint32_t LineNumber;
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StringRef Name;
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StringRef Filename;
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@ -125,7 +125,7 @@ bool GCOVFunction::readGCNO(GCOVBuffer &Buff, GCOV::GCOVVersion Version) {
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uint32_t Dummy;
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if (!Buff.readInt(Dummy)) return false; // Function header length
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if (!Buff.readInt(Ident)) return false;
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if (!Buff.readInt(Dummy)) return false; // Checksum #1
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if (!Buff.readInt(Checksum)) return false;
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if (Version != GCOV::V402) {
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uint32_t CfgChecksum;
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if (!Buff.readInt(CfgChecksum)) return false;
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@ -212,6 +212,7 @@ bool GCOVFunction::readGCNO(GCOVBuffer &Buff, GCOV::GCOVVersion Version) {
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bool GCOVFunction::readGCDA(GCOVBuffer &Buff, GCOV::GCOVVersion Version) {
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uint32_t Dummy;
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if (!Buff.readInt(Dummy)) return false; // Function header length
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uint32_t GCDAIdent;
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if (!Buff.readInt(GCDAIdent)) return false;
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if (Ident != GCDAIdent) {
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@ -220,8 +221,13 @@ bool GCOVFunction::readGCDA(GCOVBuffer &Buff, GCOV::GCOVVersion Version) {
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return false;
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}
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if (!Buff.readInt(Dummy)) return false; // Checksum #1
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uint32_t GCDAChecksum;
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if (!Buff.readInt(GCDAChecksum)) return false;
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if (Checksum != GCDAChecksum) {
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errs() << "Function checksums do not match: " << Checksum << " != "
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<< GCDAChecksum << " (in " << Name << ").\n";
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return false;
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}
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uint32_t CfgChecksum;
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if (Version != GCOV::V402) {
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@ -314,12 +314,18 @@ namespace {
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this->os = os;
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Function *F = SP.getFunction();
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DEBUG(dbgs() << "Function: " << F->getName() << "\n");
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DEBUG(dbgs() << "Function: " << getFunctionName(SP) << "\n");
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uint32_t i = 0;
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for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
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Blocks[BB] = new GCOVBlock(i++, os);
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}
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ReturnBlock = new GCOVBlock(i++, os);
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std::string FunctionNameAndLine;
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raw_string_ostream FNLOS(FunctionNameAndLine);
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FNLOS << getFunctionName(SP) << SP.getLineNumber();
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FNLOS.flush();
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FuncChecksum = hash_value(FunctionNameAndLine);
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}
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~GCOVFunction() {
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@ -347,6 +353,10 @@ namespace {
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return EdgeDestinations;
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}
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uint32_t getFuncChecksum() {
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return FuncChecksum;
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}
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void setCfgChecksum(uint32_t Checksum) {
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CfgChecksum = Checksum;
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}
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@ -359,7 +369,7 @@ namespace {
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++BlockLen;
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write(BlockLen);
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write(Ident);
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write(0); // lineno checksum
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write(FuncChecksum);
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if (UseCfgChecksum)
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write(CfgChecksum);
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writeGCOVString(getFunctionName(SP));
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@ -401,6 +411,7 @@ namespace {
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private:
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DISubprogram SP;
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uint32_t Ident;
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uint32_t FuncChecksum;
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bool UseCfgChecksum;
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uint32_t CfgChecksum;
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DenseMap<BasicBlock *, GCOVBlock *> Blocks;
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@ -731,6 +742,7 @@ Constant *GCOVProfiler::getEmitFunctionFunc() {
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Type *Args[] = {
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Type::getInt32Ty(*Ctx), // uint32_t ident
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Type::getInt8PtrTy(*Ctx), // const char *function_name
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Type::getInt32Ty(*Ctx), // uint32_t func_checksum
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Type::getInt8Ty(*Ctx), // uint8_t use_extra_checksum
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Type::getInt32Ty(*Ctx), // uint32_t cfg_checksum
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};
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@ -813,11 +825,12 @@ Function *GCOVProfiler::insertCounterWriteout(
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Builder.getInt32(CfgChecksum));
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for (unsigned j = 0, e = CountersBySP.size(); j != e; ++j) {
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DISubprogram SP(CountersBySP[j].second);
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Builder.CreateCall4(
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Builder.CreateCall5(
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EmitFunction, Builder.getInt32(j),
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Options.FunctionNamesInData ?
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Builder.CreateGlobalStringPtr(getFunctionName(SP)) :
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Constant::getNullValue(Builder.getInt8PtrTy()),
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Builder.getInt32(Funcs[j]->getFuncChecksum()),
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Builder.getInt8(Options.UseCfgChecksum),
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Builder.getInt32(CfgChecksum));
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BIN
test/tools/llvm-cov/Inputs/test_file_checksum_fail.gcda
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test/tools/llvm-cov/Inputs/test_file_checksum_fail.gcda
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test/tools/llvm-cov/Inputs/test_func_checksum_fail.gcda
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test/tools/llvm-cov/Inputs/test_func_checksum_fail.gcda
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@ -11,6 +11,8 @@ RUN: rm test.cpp.llcov
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RUN: not llvm-cov -gcno=test_read_fail.gcno -gcda=test.gcda
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RUN: not llvm-cov -gcno=test.gcno -gcda=test_checksum_mismatch.gcda
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RUN: not llvm-cov -gcno=test.gcno -gcda=test_file_checksum_fail.gcda
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RUN: not llvm-cov -gcno=test.gcno -gcda=test_func_checksum_fail.gcda
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XFAIL: powerpc64, s390x, mips
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