forked from OSchip/llvm-project
183 lines
6.9 KiB
C
183 lines
6.9 KiB
C
/*===- InstrProfiling.h- Support library for PGO instrumentation ----------===*\
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|*
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|* The LLVM Compiler Infrastructure
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|*
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|* This file is distributed under the University of Illinois Open Source
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|* License. See LICENSE.TXT for details.
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|*
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\*===----------------------------------------------------------------------===*/
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#ifndef PROFILE_INSTRPROFILING_INTERNALH_
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#define PROFILE_INSTRPROFILING_INTERNALH_
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#include "InstrProfiling.h"
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#include "stddef.h"
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/*!
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* \brief Write instrumentation data to the given buffer, given explicit
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* pointers to the live data in memory. This function is probably not what you
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* want. Use __llvm_profile_get_size_for_buffer instead. Use this function if
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* your program has a custom memory layout.
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*/
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uint64_t __llvm_profile_get_size_for_buffer_internal(
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const __llvm_profile_data *DataBegin, const __llvm_profile_data *DataEnd,
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const uint64_t *CountersBegin, const uint64_t *CountersEnd,
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const char *NamesBegin, const char *NamesEnd);
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/*!
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* \brief Write instrumentation data to the given buffer, given explicit
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* pointers to the live data in memory. This function is probably not what you
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* want. Use __llvm_profile_write_buffer instead. Use this function if your
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* program has a custom memory layout.
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*
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* \pre \c Buffer is the start of a buffer at least as big as \a
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* __llvm_profile_get_size_for_buffer_internal().
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*/
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int __llvm_profile_write_buffer_internal(
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char *Buffer, const __llvm_profile_data *DataBegin,
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const __llvm_profile_data *DataEnd, const uint64_t *CountersBegin,
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const uint64_t *CountersEnd, const char *NamesBegin, const char *NamesEnd);
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/*!
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* The data structure describing the data to be written by the
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* low level writer callback function.
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*/
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typedef struct ProfDataIOVec {
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const void *Data;
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size_t ElmSize;
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size_t NumElm;
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} ProfDataIOVec;
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typedef uint32_t (*WriterCallback)(ProfDataIOVec *, uint32_t NumIOVecs,
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void **WriterCtx);
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/*!
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* The data structure for buffered IO of profile data.
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*/
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typedef struct ProfBufferIO {
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/* File handle. */
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void *File;
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/* Low level IO callback. */
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WriterCallback FileWriter;
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/* The start of the buffer. */
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uint8_t *BufferStart;
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/* Total size of the buffer. */
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uint32_t BufferSz;
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/* Current byte offset from the start of the buffer. */
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uint32_t CurOffset;
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} ProfBufferIO;
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/* The creator interface used by testing. */
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ProfBufferIO *lprofCreateBufferIOInternal(void *File, uint32_t BufferSz);
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/*!
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* This is the interface to create a handle for buffered IO.
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*/
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ProfBufferIO *lprofCreateBufferIO(WriterCallback FileWriter, void *File);
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/*!
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* The interface to destroy the bufferIO handle and reclaim
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* the memory.
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*/
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void lprofDeleteBufferIO(ProfBufferIO *BufferIO);
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/*!
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* This is the interface to write \c Data of \c Size bytes through
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* \c BufferIO. Returns 0 if successful, otherwise return -1.
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*/
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int lprofBufferIOWrite(ProfBufferIO *BufferIO, const uint8_t *Data,
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uint32_t Size);
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/*!
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* The interface to flush the remaining data in the buffer.
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* through the low level writer callback.
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*/
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int lprofBufferIOFlush(ProfBufferIO *BufferIO);
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/* The low level interface to write data into a buffer. It is used as the
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* callback by other high level writer methods such as buffered IO writer
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* and profile data writer. */
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uint32_t lprofBufferWriter(ProfDataIOVec *IOVecs, uint32_t NumIOVecs,
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void **WriterCtx);
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struct ValueProfData;
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struct ValueProfRecord;
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struct InstrProfValueData;
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struct ValueProfNode;
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/*!
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* The class that defines a set of methods to read value profile
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* data for streaming/serialization from the instrumentation runtime.
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*/
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typedef struct VPDataReaderType {
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uint32_t (*InitRTRecord)(const __llvm_profile_data *Data,
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uint8_t *SiteCountArray[]);
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/* Function pointer to getValueProfRecordHeader method. */
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uint32_t (*GetValueProfRecordHeaderSize)(uint32_t NumSites);
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/* Function pointer to getFristValueProfRecord method. */
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struct ValueProfRecord *(*GetFirstValueProfRecord)(struct ValueProfData *);
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/* Return the number of value data for site \p Site. */
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uint32_t (*GetNumValueDataForSite)(uint32_t VK, uint32_t Site);
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/* Return the total size of the value profile data of the
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* current function. */
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uint32_t (*GetValueProfDataSize)(void);
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/*!
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* Read the next \p N value data for site \p Site and store the data
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* in \p Dst. \p StartNode is the first value node to start with if
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* it is not null. The function returns the pointer to the value
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* node pointer to be used as the \p StartNode of the next batch reading.
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* If there is nothing left, it returns NULL.
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*/
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struct ValueProfNode *(*GetValueData)(uint32_t ValueKind, uint32_t Site,
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struct InstrProfValueData *Dst,
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struct ValueProfNode *StartNode,
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uint32_t N);
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} VPDataReaderType;
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int lprofWriteData(WriterCallback Writer, void *WriterCtx,
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VPDataReaderType *VPDataReader);
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int lprofWriteDataImpl(WriterCallback Writer, void *WriterCtx,
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const __llvm_profile_data *DataBegin,
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const __llvm_profile_data *DataEnd,
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const uint64_t *CountersBegin,
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const uint64_t *CountersEnd,
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VPDataReaderType *VPDataReader, const char *NamesBegin,
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const char *NamesEnd);
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/* Merge value profile data pointed to by SrcValueProfData into
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* in-memory profile counters pointed by to DstData. */
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void lprofMergeValueProfData(struct ValueProfData *SrcValueProfData,
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__llvm_profile_data *DstData);
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VPDataReaderType *lprofGetVPDataReader();
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/* Internal interface used by test to reset the max number of
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* tracked values per value site to be \p MaxVals.
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*/
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void lprofSetMaxValsPerSite(uint32_t MaxVals);
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void lprofSetupValueProfiler();
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/* Return the profile header 'signature' value associated with the current
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* executable or shared library. The signature value can be used to for
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* a profile name that is unique to this load module so that it does not
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* collide with profiles from other binaries. It also allows shared libraries
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* to dump merged profile data into its own profile file. */
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uint64_t lprofGetLoadModuleSignature();
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/*
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* Return non zero value if the profile data has already been
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* dumped to the file.
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*/
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unsigned lprofProfileDumped();
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void lprofSetProfileDumped();
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COMPILER_RT_VISIBILITY extern void (*FreeHook)(void *);
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COMPILER_RT_VISIBILITY extern uint8_t *DynamicBufferIOBuffer;
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COMPILER_RT_VISIBILITY extern uint32_t VPBufferSize;
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COMPILER_RT_VISIBILITY extern uint32_t VPMaxNumValsPerSite;
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/* Pointer to the start of static value counters to be allocted. */
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COMPILER_RT_VISIBILITY extern ValueProfNode *CurrentVNode;
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COMPILER_RT_VISIBILITY extern ValueProfNode *EndVNode;
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extern void (*VPMergeHook)(struct ValueProfData *, __llvm_profile_data *);
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#endif
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