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02da814a94
This provides a library to work with the instrumentation based profiling format that is used by clang's -fprofile-instr-* options and by the llvm-profdata tool. This is a binary format, rather than the textual one that's currently in use. The tests are in the subsequent commits that use this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203703 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
//=-- ProfileDataWriter.h - Instrumented profiling writer ---------*- C++ -*-=//
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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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//
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// This file contains support for writing profiling data for instrumentation
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// based PGO and coverage.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_PROFILE_PROFILEDATA_WRITER_H__
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#define LLVM_PROFILE_PROFILEDATA_WRITER_H__
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#include "llvm/ADT/StringMap.h"
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/raw_ostream.h"
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#include <vector>
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namespace llvm {
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struct __attribute__((packed)) ProfileDataHeader {
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char Magic[4];
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uint32_t Version;
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uint32_t DataStart;
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uint32_t Padding;
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uint64_t MaxFunctionCount;
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};
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/// Writer for instrumentation based profile data
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class ProfileDataWriter {
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StringMap<size_t> FunctionOffsets;
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std::vector<uint64_t> FunctionData;
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uint32_t DataStart;
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uint64_t MaxFunctionCount;
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void write32(raw_ostream &OS, uint32_t Value);
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void write64(raw_ostream &OS, uint64_t Value);
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public:
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ProfileDataWriter()
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: DataStart(sizeof(ProfileDataHeader)), MaxFunctionCount(0) {}
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void addFunctionCounts(StringRef FuncName, uint64_t FunctionHash,
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uint64_t NumCounters, const uint64_t *Counters);
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void write(raw_ostream &OS);
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};
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} // end namespace llvm
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#endif // LLVM_PROFILE_PROFILEDATA_WRITER_H__
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