forked from OSchip/llvm-project
61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
//=-- InstrProfWriter.cpp - Instrumented profiling writer -------------------=//
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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 clang's
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// instrumentation based PGO and coverage.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ProfileData/InstrProfWriter.h"
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#include "llvm/Support/Endian.h"
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using namespace llvm;
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error_code InstrProfWriter::addFunctionCounts(StringRef FunctionName,
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uint64_t FunctionHash,
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ArrayRef<uint64_t> Counters) {
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auto Where = FunctionData.find(FunctionName);
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if (Where == FunctionData.end()) {
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// If this is the first time we've seen this function, just add it.
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auto &Data = FunctionData[FunctionName];
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Data.Hash = FunctionHash;
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Data.Counts = Counters;
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return instrprof_error::success;;
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}
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auto &Data = Where->getValue();
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// We can only add to existing functions if they match, so we check the hash
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// and number of counters.
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if (Data.Hash != FunctionHash)
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return instrprof_error::hash_mismatch;
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if (Data.Counts.size() != Counters.size())
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return instrprof_error::count_mismatch;
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// These match, add up the counters.
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for (size_t I = 0, E = Counters.size(); I < E; ++I) {
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if (Data.Counts[I] + Counters[I] < Data.Counts[I])
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return instrprof_error::counter_overflow;
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Data.Counts[I] += Counters[I];
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}
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return instrprof_error::success;
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}
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void InstrProfWriter::write(raw_ostream &OS) {
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// Write out the counts for each function.
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for (const auto &I : FunctionData) {
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StringRef Name = I.getKey();
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uint64_t Hash = I.getValue().Hash;
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const std::vector<uint64_t> &Counts = I.getValue().Counts;
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OS << Name << "\n" << Hash << "\n" << Counts.size() << "\n";
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for (uint64_t Count : Counts)
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OS << Count << "\n";
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OS << "\n";
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}
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}
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