if (Counts.size() != Other.Counts.size())
return instrprof_error::count_mismatch;
+ instrprof_error Result = instrprof_error::success;
+
for (size_t I = 0, E = Other.Counts.size(); I < E; ++I) {
- if (Counts[I] + Other.Counts[I] < Counts[I])
- return instrprof_error::counter_overflow;
- Counts[I] += Other.Counts[I];
+ bool ResultOverflowed;
+ Counts[I] = SaturatingAdd(Counts[I], Other.Counts[I], ResultOverflowed);
+ if (ResultOverflowed)
+ Result = instrprof_error::counter_overflow;
}
for (uint32_t Kind = IPVK_First; Kind <= IPVK_Last; ++Kind) {
- instrprof_error result = mergeValueProfData(Kind, Other);
- if (result != instrprof_error::success)
- return result;
+ instrprof_error MergeValueResult = mergeValueProfData(Kind, Other);
+ if (MergeValueResult != instrprof_error::success)
+ Result = MergeValueResult;
}
- return instrprof_error::success;
+ return Result;
}
inline support::endianness getHostEndianness() {
return sys::IsLittleEndianHost ? support::little : support::big;
}
-/// This is the header of the data structure that defines the on-disk
-/// layout of the value profile data of a particular kind for one function.
-typedef struct ValueProfRecord {
- // The kind of the value profile record.
- uint32_t Kind;
- // The number of value profile sites. It is guaranteed to be non-zero;
- // otherwise the record for this kind won't be emitted.
- uint32_t NumValueSites;
- // The first element of the array that stores the number of profiled
- // values for each value site. The size of the array is NumValueSites.
- // Since NumValueSites is greater than zero, there is at least one
- // element in the array.
- uint8_t SiteCountArray[1];
-
- // The fake declaration is for documentation purpose only.
- // Align the start of next field to be on 8 byte boundaries.
- // uint8_t Padding[X];
-
- // The array of value profile data. The size of the array is the sum
- // of all elements in SiteCountArray[].
- // InstrProfValueData ValueData[];
-
- /// Return the number of value sites.
- uint32_t getNumValueSites() const { return NumValueSites; }
- /// Read data from this record and save it to Record.
- void deserializeTo(InstrProfRecord &Record,
- InstrProfRecord::ValueMapType *VMap);
- /// In-place byte swap:
- /// Do byte swap for this instance. \c Old is the original order before
- /// the swap, and \c New is the New byte order.
- void swapBytes(support::endianness Old, support::endianness New);
-} ValueProfRecord;
-
-/// Per-function header/control data structure for value profiling
-/// data in indexed format.
-typedef struct ValueProfData {
- // Total size in bytes including this field. It must be a multiple
- // of sizeof(uint64_t).
- uint32_t TotalSize;
- // The number of value profile kinds that has value profile data.
- // In this implementation, a value profile kind is considered to
- // have profile data if the number of value profile sites for the
- // kind is not zero. More aggressively, the implementation can
- // choose to check the actual data value: if none of the value sites
- // has any profiled values, the kind can be skipped.
- uint32_t NumValueKinds;
-
- // Following are a sequence of variable length records. The prefix/header
- // of each record is defined by ValueProfRecord type. The number of
- // records is NumValueKinds.
- // ValueProfRecord Record_1;
- // ValueProfRecord Record_N;
-
- /// Return the total size in bytes of the on-disk value profile data
- /// given the data stored in Record.
- static uint32_t getSize(const InstrProfRecord &Record);
- /// Return a pointer to \c ValueProfData instance ready to be streamed.
- static std::unique_ptr<ValueProfData>
- serializeFrom(const InstrProfRecord &Record);
- /// Return a pointer to \c ValueProfileData instance ready to be read.
- /// All data in the instance are properly byte swapped. The input
- /// data is assumed to be in little endian order.
- static ErrorOr<std::unique_ptr<ValueProfData>>
- getValueProfData(const unsigned char *D, const unsigned char *const BufferEnd,
- support::endianness SrcDataEndianness);
- /// Swap byte order from \c Endianness order to host byte order.
- void swapBytesToHost(support::endianness Endianness);
- /// Swap byte order from host byte order to \c Endianness order.
- void swapBytesFromHost(support::endianness Endianness);
- /// Return the total size of \c ValueProfileData.
- uint32_t getSize() const { return TotalSize; }
- /// Read data from this data and save it to \c Record.
- void deserializeTo(InstrProfRecord &Record,
- InstrProfRecord::ValueMapType *VMap);
-} ValueProfData;
-
-/* The closure is designed to abstact away two types of value profile data:
- * - InstrProfRecord which is the primary data structure used to
- * represent profile data in host tools (reader, writer, and profile-use)
- * - value profile runtime data structure suitable to be used by C
- * runtime library.
- *
- * Both sources of data need to serialize to disk/memory-buffer in common
- * format: ValueProfData. The abstraction allows compiler-rt's raw profiler
- * writer to share * the same code with indexed profile writer.
- *
- * For documentation of the member methods below, refer to corresponding methods
- * in class InstrProfRecord.
- */
-typedef struct ValueProfRecordClosure {
- const void *Record;
- uint32_t (*GetNumValueKinds)(const void *Record);
- uint32_t (*GetNumValueSites)(const void *Record, uint32_t VKind);
- uint32_t (*GetNumValueData)(const void *Record, uint32_t VKind);
- uint32_t (*GetNumValueDataForSite)(const void *R, uint32_t VK, uint32_t S);
-
- /* After extracting the value profile data from the value profile record,
- * this method is used to map the in-memory value to on-disk value. If
- * the method is null, value will be written out untranslated.
- */
- uint64_t (*RemapValueData)(uint32_t, uint64_t Value);
- void (*GetValueForSite)(const void *R, InstrProfValueData *Dst, uint32_t K,
- uint32_t S, uint64_t (*Mapper)(uint32_t, uint64_t));
- ValueProfData *(*AllocValueProfData)(size_t TotalSizeInBytes);
-} ValueProfRecordClosure;
-
-/// Return the \c ValueProfRecord header size including the padding bytes.
-inline uint32_t getValueProfRecordHeaderSize(uint32_t NumValueSites) {
- uint32_t Size = offsetof(ValueProfRecord, SiteCountArray) +
- sizeof(uint8_t) * NumValueSites;
- // Round the size to multiple of 8 bytes.
- Size = (Size + 7) & ~7;
- return Size;
-}
-/// Return the total size of the value profile record including the
-/// header and the value data.
-inline uint32_t getValueProfRecordSize(uint32_t NumValueSites,
- uint32_t NumValueData) {
- return getValueProfRecordHeaderSize(NumValueSites) +
- sizeof(InstrProfValueData) * NumValueData;
-}
+// Include definitions for value profile data
+#define INSTR_PROF_VALUE_PROF_DATA
+#include "llvm/ProfileData/InstrProfData.inc"
-/// Return the pointer to the start of value data array.
-inline InstrProfValueData *getValueProfRecordValueData(ValueProfRecord *This) {
- return (InstrProfValueData *)((char *)This + getValueProfRecordHeaderSize(
- This->NumValueSites));
-}
+ /*
+ * Initialize the record for runtime value profile data.
+ * Return 0 if the initialization is successful, otherwise
+ * return 1.
+ */
+int initializeValueProfRuntimeRecord(ValueProfRuntimeRecord *RuntimeRecord,
+ const uint16_t *NumValueSites,
+ ValueProfNode **Nodes);
-/// Return the total number of value data for \c This record.
-inline uint32_t getValueProfRecordNumValueData(ValueProfRecord *This) {
- uint32_t NumValueData = 0;
- uint32_t I;
- for (I = 0; I < This->NumValueSites; I++)
- NumValueData += This->SiteCountArray[I];
- return NumValueData;
-}
+/* Release memory allocated for the runtime record. */
+void finalizeValueProfRuntimeRecord(ValueProfRuntimeRecord *RuntimeRecord);
-/// Use this method to advance to the next \c This \c ValueProfRecord.
-inline ValueProfRecord *getValueProfRecordNext(ValueProfRecord *This) {
- uint32_t NumValueData = getValueProfRecordNumValueData(This);
- return (ValueProfRecord *)((char *)This +
- getValueProfRecordSize(This->NumValueSites,
- NumValueData));
-}
+/* Return the size of ValueProfData structure that can be used to store
+ the value profile data collected at runtime. */
+uint32_t getValueProfDataSizeRT(const ValueProfRuntimeRecord *Record);
-/// Return the first \c ValueProfRecord instance.
-inline ValueProfRecord *getFirstValueProfRecord(ValueProfData *This) {
- return (ValueProfRecord *)((char *)This + sizeof(ValueProfData));
-}
+/* Return a ValueProfData instance that stores the data collected at runtime. */
+ValueProfData *
+serializeValueProfDataFromRT(const ValueProfRuntimeRecord *Record,
+ ValueProfData *Dst);
namespace IndexedInstrProf {
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