//
//===----------------------------------------------------------------------===//
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/GlobalVariable.h"
#include "llvm/ProfileData/InstrProf.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ManagedStatic.h"
return "Success";
case instrprof_error::eof:
return "End of File";
+ case instrprof_error::unrecognized_format:
+ return "Unrecognized instrumentation profile encoding format";
case instrprof_error::bad_magic:
- return "Invalid file format (bad magic)";
+ return "Invalid instrumentation profile data (bad magic)";
case instrprof_error::bad_header:
- return "Invalid header";
+ return "Invalid instrumentation profile data (file header is corrupt)";
case instrprof_error::unsupported_version:
- return "Unsupported format version";
+ return "Unsupported instrumentation profile format version";
case instrprof_error::unsupported_hash_type:
- return "Unsupported hash function";
+ return "Unsupported instrumentation profile hash type";
case instrprof_error::too_large:
return "Too much profile data";
case instrprof_error::truncated:
return "Truncated profile data";
case instrprof_error::malformed:
- return "Malformed profile data";
+ return "Malformed instrumentation profile data";
case instrprof_error::unknown_function:
return "No profile data available for function";
case instrprof_error::hash_mismatch:
- return "Function hash mismatch";
+ return "Function control flow change detected (hash mismatch)";
case instrprof_error::count_mismatch:
- return "Function count mismatch";
+ return "Function basic block count change detected (counter mismatch)";
case instrprof_error::counter_overflow:
return "Counter overflow";
+ case instrprof_error::value_site_count_mismatch:
+ return "Function value site count change detected (counter mismatch)";
}
llvm_unreachable("A value of instrprof_error has no message.");
}
const std::error_category &llvm::instrprof_category() {
return *ErrorCategory;
}
+
+namespace llvm {
+
+std::string getPGOFuncName(StringRef RawFuncName,
+ GlobalValue::LinkageTypes Linkage,
+ StringRef FileName,
+ uint64_t Version LLVM_ATTRIBUTE_UNUSED) {
+
+ // Function names may be prefixed with a binary '1' to indicate
+ // that the backend should not modify the symbols due to any platform
+ // naming convention. Do not include that '1' in the PGO profile name.
+ if (RawFuncName[0] == '\1')
+ RawFuncName = RawFuncName.substr(1);
+
+ std::string FuncName = RawFuncName;
+ if (llvm::GlobalValue::isLocalLinkage(Linkage)) {
+ // For local symbols, prepend the main file name to distinguish them.
+ // Do not include the full path in the file name since there's no guarantee
+ // that it will stay the same, e.g., if the files are checked out from
+ // version control in different locations.
+ if (FileName.empty())
+ FuncName = FuncName.insert(0, "<unknown>:");
+ else
+ FuncName = FuncName.insert(0, FileName.str() + ":");
+ }
+ return FuncName;
+}
+
+std::string getPGOFuncName(const Function &F, uint64_t Version) {
+ return getPGOFuncName(F.getName(), F.getLinkage(), F.getParent()->getName(),
+ Version);
+}
+
+StringRef getFuncNameWithoutPrefix(StringRef PGOFuncName, StringRef FileName) {
+ if (FileName.empty())
+ return PGOFuncName;
+ // Drop the file name including ':'. See also getPGOFuncName.
+ if (PGOFuncName.startswith(FileName))
+ PGOFuncName = PGOFuncName.drop_front(FileName.size() + 1);
+ return PGOFuncName;
+}
+
+// \p FuncName is the string used as profile lookup key for the function. A
+// symbol is created to hold the name. Return the legalized symbol name.
+static std::string getPGOFuncNameVarName(StringRef FuncName,
+ GlobalValue::LinkageTypes Linkage) {
+ std::string VarName = getInstrProfNameVarPrefix();
+ VarName += FuncName;
+
+ if (!GlobalValue::isLocalLinkage(Linkage))
+ return VarName;
+
+ // Now fix up illegal chars in local VarName that may upset the assembler.
+ const char *InvalidChars = "-:<>\"'";
+ size_t found = VarName.find_first_of(InvalidChars);
+ while (found != std::string::npos) {
+ VarName[found] = '_';
+ found = VarName.find_first_of(InvalidChars, found + 1);
+ }
+ return VarName;
+}
+
+GlobalVariable *createPGOFuncNameVar(Module &M,
+ GlobalValue::LinkageTypes Linkage,
+ StringRef FuncName) {
+
+ // We generally want to match the function's linkage, but available_externally
+ // and extern_weak both have the wrong semantics, and anything that doesn't
+ // need to link across compilation units doesn't need to be visible at all.
+ if (Linkage == GlobalValue::ExternalWeakLinkage)
+ Linkage = GlobalValue::LinkOnceAnyLinkage;
+ else if (Linkage == GlobalValue::AvailableExternallyLinkage)
+ Linkage = GlobalValue::LinkOnceODRLinkage;
+ else if (Linkage == GlobalValue::InternalLinkage ||
+ Linkage == GlobalValue::ExternalLinkage)
+ Linkage = GlobalValue::PrivateLinkage;
+
+ auto *Value = ConstantDataArray::getString(M.getContext(), FuncName, false);
+ auto FuncNameVar =
+ new GlobalVariable(M, Value->getType(), true, Linkage, Value,
+ getPGOFuncNameVarName(FuncName, Linkage));
+
+ // Hide the symbol so that we correctly get a copy for each executable.
+ if (!GlobalValue::isLocalLinkage(FuncNameVar->getLinkage()))
+ FuncNameVar->setVisibility(GlobalValue::HiddenVisibility);
+
+ return FuncNameVar;
+}
+
+GlobalVariable *createPGOFuncNameVar(Function &F, StringRef FuncName) {
+ return createPGOFuncNameVar(*F.getParent(), F.getLinkage(), FuncName);
+}
+
+#define INSTR_PROF_COMMON_API_IMPL
+#include "llvm/ProfileData/InstrProfData.inc"
+
+
+/*!
+ * \brief ValueProfRecordClosure Interface implementation for InstrProfRecord
+ * class. These C wrappers are used as adaptors so that C++ code can be
+ * invoked as callbacks.
+ */
+uint32_t getNumValueKindsInstrProf(const void *Record) {
+ return reinterpret_cast<const InstrProfRecord *>(Record)->getNumValueKinds();
+}
+
+uint32_t getNumValueSitesInstrProf(const void *Record, uint32_t VKind) {
+ return reinterpret_cast<const InstrProfRecord *>(Record)
+ ->getNumValueSites(VKind);
+}
+
+uint32_t getNumValueDataInstrProf(const void *Record, uint32_t VKind) {
+ return reinterpret_cast<const InstrProfRecord *>(Record)
+ ->getNumValueData(VKind);
+}
+
+uint32_t getNumValueDataForSiteInstrProf(const void *R, uint32_t VK,
+ uint32_t S) {
+ return reinterpret_cast<const InstrProfRecord *>(R)
+ ->getNumValueDataForSite(VK, S);
+}
+
+void getValueForSiteInstrProf(const void *R, InstrProfValueData *Dst,
+ uint32_t K, uint32_t S,
+ uint64_t (*Mapper)(uint32_t, uint64_t)) {
+ return reinterpret_cast<const InstrProfRecord *>(R)
+ ->getValueForSite(Dst, K, S, Mapper);
+}
+
+uint64_t stringToHash(uint32_t ValueKind, uint64_t Value) {
+ switch (ValueKind) {
+ case IPVK_IndirectCallTarget:
+ return IndexedInstrProf::ComputeHash((const char *)Value);
+ break;
+ default:
+ llvm_unreachable("value kind not handled !");
+ }
+ return Value;
+}
+
+ValueProfData *allocValueProfDataInstrProf(size_t TotalSizeInBytes) {
+ ValueProfData *VD =
+ (ValueProfData *)(new (::operator new(TotalSizeInBytes)) ValueProfData());
+ memset(VD, 0, TotalSizeInBytes);
+ return VD;
+}
+
+static ValueProfRecordClosure InstrProfRecordClosure = {
+ 0,
+ getNumValueKindsInstrProf,
+ getNumValueSitesInstrProf,
+ getNumValueDataInstrProf,
+ getNumValueDataForSiteInstrProf,
+ stringToHash,
+ getValueForSiteInstrProf,
+ allocValueProfDataInstrProf};
+
+// Wrapper implementation using the closure mechanism.
+uint32_t ValueProfData::getSize(const InstrProfRecord &Record) {
+ InstrProfRecordClosure.Record = &Record;
+ return getValueProfDataSize(&InstrProfRecordClosure);
+}
+
+// Wrapper implementation using the closure mechanism.
+std::unique_ptr<ValueProfData>
+ValueProfData::serializeFrom(const InstrProfRecord &Record) {
+ InstrProfRecordClosure.Record = &Record;
+
+ std::unique_ptr<ValueProfData> VPD(
+ serializeValueProfDataFrom(&InstrProfRecordClosure, nullptr));
+ return VPD;
+}
+
+void ValueProfRecord::deserializeTo(InstrProfRecord &Record,
+ InstrProfRecord::ValueMapType *VMap) {
+ Record.reserveSites(Kind, NumValueSites);
+
+ InstrProfValueData *ValueData = getValueProfRecordValueData(this);
+ for (uint64_t VSite = 0; VSite < NumValueSites; ++VSite) {
+ uint8_t ValueDataCount = this->SiteCountArray[VSite];
+ Record.addValueData(Kind, VSite, ValueData, ValueDataCount, VMap);
+ ValueData += ValueDataCount;
+ }
+}
+
+// For writing/serializing, Old is the host endianness, and New is
+// byte order intended on disk. For Reading/deserialization, Old
+// is the on-disk source endianness, and New is the host endianness.
+void ValueProfRecord::swapBytes(support::endianness Old,
+ support::endianness New) {
+ using namespace support;
+ if (Old == New)
+ return;
+
+ if (getHostEndianness() != Old) {
+ sys::swapByteOrder<uint32_t>(NumValueSites);
+ sys::swapByteOrder<uint32_t>(Kind);
+ }
+ uint32_t ND = getValueProfRecordNumValueData(this);
+ InstrProfValueData *VD = getValueProfRecordValueData(this);
+
+ // No need to swap byte array: SiteCountArrray.
+ for (uint32_t I = 0; I < ND; I++) {
+ sys::swapByteOrder<uint64_t>(VD[I].Value);
+ sys::swapByteOrder<uint64_t>(VD[I].Count);
+ }
+ if (getHostEndianness() == Old) {
+ sys::swapByteOrder<uint32_t>(NumValueSites);
+ sys::swapByteOrder<uint32_t>(Kind);
+ }
+}
+
+void ValueProfData::deserializeTo(InstrProfRecord &Record,
+ InstrProfRecord::ValueMapType *VMap) {
+ if (NumValueKinds == 0)
+ return;
+
+ ValueProfRecord *VR = getFirstValueProfRecord(this);
+ for (uint32_t K = 0; K < NumValueKinds; K++) {
+ VR->deserializeTo(Record, VMap);
+ VR = getValueProfRecordNext(VR);
+ }
+}
+
+template <class T>
+static T swapToHostOrder(const unsigned char *&D, support::endianness Orig) {
+ using namespace support;
+ if (Orig == little)
+ return endian::readNext<T, little, unaligned>(D);
+ else
+ return endian::readNext<T, big, unaligned>(D);
+}
+
+static std::unique_ptr<ValueProfData> allocValueProfData(uint32_t TotalSize) {
+ return std::unique_ptr<ValueProfData>(new (::operator new(TotalSize))
+ ValueProfData());
+}
+
+instrprof_error ValueProfData::checkIntegrity() {
+ if (NumValueKinds > IPVK_Last + 1)
+ return instrprof_error::malformed;
+ // Total size needs to be mulltiple of quadword size.
+ if (TotalSize % sizeof(uint64_t))
+ return instrprof_error::malformed;
+
+ ValueProfRecord *VR = getFirstValueProfRecord(this);
+ for (uint32_t K = 0; K < this->NumValueKinds; K++) {
+ if (VR->Kind > IPVK_Last)
+ return instrprof_error::malformed;
+ VR = getValueProfRecordNext(VR);
+ if ((char *)VR - (char *)this > (ptrdiff_t)TotalSize)
+ return instrprof_error::malformed;
+ }
+ return instrprof_error::success;
+}
+
+ErrorOr<std::unique_ptr<ValueProfData>>
+ValueProfData::getValueProfData(const unsigned char *D,
+ const unsigned char *const BufferEnd,
+ support::endianness Endianness) {
+ using namespace support;
+ if (D + sizeof(ValueProfData) > BufferEnd)
+ return instrprof_error::truncated;
+
+ const unsigned char *Header = D;
+ uint32_t TotalSize = swapToHostOrder<uint32_t>(Header, Endianness);
+ if (D + TotalSize > BufferEnd)
+ return instrprof_error::too_large;
+
+ std::unique_ptr<ValueProfData> VPD = allocValueProfData(TotalSize);
+ memcpy(VPD.get(), D, TotalSize);
+ // Byte swap.
+ VPD->swapBytesToHost(Endianness);
+
+ instrprof_error EC = VPD->checkIntegrity();
+ if (EC != instrprof_error::success)
+ return EC;
+
+ return std::move(VPD);
+}
+
+void ValueProfData::swapBytesToHost(support::endianness Endianness) {
+ using namespace support;
+ if (Endianness == getHostEndianness())
+ return;
+
+ sys::swapByteOrder<uint32_t>(TotalSize);
+ sys::swapByteOrder<uint32_t>(NumValueKinds);
+
+ ValueProfRecord *VR = getFirstValueProfRecord(this);
+ for (uint32_t K = 0; K < NumValueKinds; K++) {
+ VR->swapBytes(Endianness, getHostEndianness());
+ VR = getValueProfRecordNext(VR);
+ }
+}
+
+void ValueProfData::swapBytesFromHost(support::endianness Endianness) {
+ using namespace support;
+ if (Endianness == getHostEndianness())
+ return;
+
+ ValueProfRecord *VR = getFirstValueProfRecord(this);
+ for (uint32_t K = 0; K < NumValueKinds; K++) {
+ ValueProfRecord *NVR = getValueProfRecordNext(VR);
+ VR->swapBytes(getHostEndianness(), Endianness);
+ VR = NVR;
+ }
+ sys::swapByteOrder<uint32_t>(TotalSize);
+ sys::swapByteOrder<uint32_t>(NumValueKinds);
+}
+
+}
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