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