80 lines
2.3 KiB
C++
80 lines
2.3 KiB
C++
//===- ExtractRanges.cpp ----------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DebugInfo/GSYM/ExtractRanges.h"
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#include "llvm/DebugInfo/GSYM/FileWriter.h"
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#include "llvm/Support/DataExtractor.h"
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#include <algorithm>
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#include <inttypes.h>
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namespace llvm {
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namespace gsym {
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void encodeRange(const AddressRange &Range, FileWriter &O, uint64_t BaseAddr) {
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assert(Range.start() >= BaseAddr);
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O.writeULEB(Range.start() - BaseAddr);
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O.writeULEB(Range.size());
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}
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AddressRange decodeRange(DataExtractor &Data, uint64_t BaseAddr,
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uint64_t &Offset) {
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const uint64_t AddrOffset = Data.getULEB128(&Offset);
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const uint64_t Size = Data.getULEB128(&Offset);
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const uint64_t StartAddr = BaseAddr + AddrOffset;
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return {StartAddr, StartAddr + Size};
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}
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void encodeRanges(const AddressRanges &Ranges, FileWriter &O,
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uint64_t BaseAddr) {
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O.writeULEB(Ranges.size());
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if (Ranges.empty())
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return;
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for (auto Range : Ranges)
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encodeRange(Range, O, BaseAddr);
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}
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void decodeRanges(AddressRanges &Ranges, DataExtractor &Data, uint64_t BaseAddr,
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uint64_t &Offset) {
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Ranges.clear();
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uint64_t NumRanges = Data.getULEB128(&Offset);
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Ranges.reserve(NumRanges);
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for (uint64_t RangeIdx = 0; RangeIdx < NumRanges; RangeIdx++)
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Ranges.insert(decodeRange(Data, BaseAddr, Offset));
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}
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void skipRange(DataExtractor &Data, uint64_t &Offset) {
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Data.getULEB128(&Offset);
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Data.getULEB128(&Offset);
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}
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uint64_t skipRanges(DataExtractor &Data, uint64_t &Offset) {
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uint64_t NumRanges = Data.getULEB128(&Offset);
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for (uint64_t I = 0; I < NumRanges; ++I)
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skipRange(Data, Offset);
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return NumRanges;
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}
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} // namespace gsym
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raw_ostream &operator<<(raw_ostream &OS, const AddressRange &R) {
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return OS << '[' << HEX64(R.start()) << " - " << HEX64(R.end()) << ")";
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}
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raw_ostream &operator<<(raw_ostream &OS, const AddressRanges &AR) {
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size_t Size = AR.size();
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for (size_t I = 0; I < Size; ++I) {
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if (I)
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OS << ' ';
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OS << AR[I];
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}
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return OS;
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}
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} // namespace llvm
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